RLC PROTECTION RELAY
A high performance protection relay for capacitor banksand harmonic filter circuits
A comprehensive, numeric protection relay, featuring:
• Compact draw-out design• Panel or 19 inch rack mounting• Four configurable measuring elements• Five configurable output relays• One self-supervision output relay• An RS232 or RS485 serial data port option
For technical capability, back up and support, contact STRIKE Technologies
RLC RELAY – COMPREHENSIVE, ECONOMICAL AND EASY–TO–USE
P O Box 1810 987 Richards DriveHalfway House, 1685 Halfway HouseGauteng GautengRepublic of South Africa Republic of South Africa
Tel.: +27 11 315-0815 Fax.: +27 11 315-2559
E-Mail:[email protected]
RLC RELAY (Rev.01.26.09.97) Page 1 of 140
OPERATING AND INSTRUCTION MANUAL
FOR THE
RLC RELAY
These instructions do not purport to cover all details or variations in equipment, nor to provide forevery possible contingency to be met during installation, operation and maintenance. Shouldfurther information be required, or should particular issues arise that are not covered sufficiently forthe purchasers purpose, the matter should be referred to:
RLC RELAY (Rev.01.26.09.97) Page 2 of 140
RLC RELAY
DOCUMENT HISTORY
REVISION DATE DESCRIPTION
01.26.09.97 26 September 1997 First issue
______________________________________________________________________________APPROVALS:
_____________________ _____________________ _____________________Managing Director Development Manager Project Manager
______________________________________________________________________________OPERATING AND INSTRUCTION MANUAL FOR THE RLC RELAY
FOR PROTECTION OF CAPACITOR BANKS AND HARMONIC FILTER CIRCUITS
RLC RELAY (Rev.01.26.09.97) Page 3 of 140
SAFETY SYMBOL LEGEND
WARNING Draws attention to an operating procedure, practice, condition orstatement, which, if not strictly observed, could result in injury or death.
CAUTION Draws attention to an essential operating procedure, practice orstatement, which, if not observed, could result in damage to, ordestruction of, equipment.
NOTE Draws attention to an essential operating or maintenance procedure, orstatement, that must be observed.
WARNING
This equipment is potentially hazardous in respect of electrical shock or electrical burn.
Only personnel, who are adequately trained and thoroughly familiar with the RLC Relay,and these instructions, should install, operate or maintain this equipment.
To minimize the hazard of electrical shock or burn, the user should adhere to approvedprotection and safety procedures.
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TABLE OF CONTENTS
1 INTRODUCTION.....................................................................................................................................12
2 OVERVIEW OF THE RLC RELAY .......................................................................................................13
2.1 INTRODUCTION.................................................................................................................................13
2.2 APPLICATION.....................................................................................................................................13
2.3 PROTECTIVE FUNCTIONS PROVIDED BY THE RLC RELAY..................................................13
2.3.1 Peak repetitive overvoltage protection (Refer to Fig. 21) ............................................................13
2.3.2 Thermal overcurrent protection (Refer to Fig. 21) .......................................................................14
2.3.3 Fundamental frequency star point unbalance protection (Refer to Fig. 22).................................15
2.3.4 Fundamental frequency “H” CONFIGURATION capacitor bank unbalance protection
(Refer to Fig. 24)............................................................................................................................16
2.3.5 Fundamental frequency line current unbalance protection (Refer to Fig. 23) .............................16
2.3.6 Fundamental frequency earth fault protection (Refer to Fig.23)..................................................17
2.3.7 Fundamental frequency overvoltage and overcurrent protection (Refer to Fig. 21)....................17
2.3.8 Fundamental frequency undercurrent protection (Refer to Fig. 21).............................................18
2.3.9 Breaker fail protection (Refer to Fig. 21) .....................................................................................18
2.3.10 Capacitor bank re-switching protection (Refer to Fig 23)............................................................18
2.4 MEASURING AND PROTECTION ELEMENTS..............................................................................................19
2.5 RELAY OUTPUTS .....................................................................................................................................20
2.6 CONTACT FORMS ....................................................................................................................................20
2.7 AUXILIARY POWER SUPPLY ....................................................................................................................20
2.8 LED INDICATORS ...................................................................................................................................21
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2.9 LCD DISPLAY.........................................................................................................................................21
2.10 HOUSING AND TERMINALS .................................................................................................................22
2.11 KEYPAD..............................................................................................................................................22
2.12 DIGITAL INPUT....................................................................................................................................22
2.13 TEST FACILITIES .................................................................................................................................23
2.14 SERIAL DATA INPUT / OUTPUT PORT ...................................................................................................23
2.15 PC BASED SOFTWARE PACKAGE.........................................................................................................24
2.16 AVAILABLE TYPES..............................................................................................................................24
2.17 GENERAL CHARACTERISTICS..............................................................................................................26
2.18 TECHNICAL SPECIFICATIONS ..............................................................................................................26
2.19 SETTABLE PARAMETERS AND SETTING RANGES .................................................................................26
2.20 DIMENSIONS AND CUT-OUT DETAILS..................................................................................................26
2.21 TERMINAL DIAGRAM AND CONNECTIONS...........................................................................................26
3 RLC RELAY HARDWARE DETAILS...................................................................................................27
3.1 INTRODUCTION.................................................................................................................................27
3.2 NOMENCLATURE AND IDENTIFICATION OF EXTERNAL COMPONENTS.........................27
3.3 ENCLOSURE AND DRAW-OUT UNIT............................................................................................27
3.4 TERMINALS ........................................................................................................................................28
3.5 MEASURING ELEMENTS.................................................................................................................28
3.6 RELAY OUTPUTS...............................................................................................................................29
4 KEYPAD OPERATIONS.........................................................................................................................30
4.1 INTRODUCTION.................................................................................................................................30
4.2 ACCESSING THE NORMAL OPERATION SCREEN DISPLAYS................................................30
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4.3 ACCESSING THE MAIN MENU FUNCTION .................................................................................30
4.4 EXECUTING ANY MAIN MENU OR SUB-MENU FUNCTIONS ................................................33
4.5 REVERTING BACK FROM THE MAIN MENU FUNCTIONS TO THE DEFAULT
NORMAL OPERATION SCREEN DISPLAY ...................................................................................33
4.6 ACCESS PARAMETER SETUP MENU (OPTIONAL PASSWORD PROTECTION) ................................33
4.6.1 Setting of “ELEMENT” variables ................................................................................................35
4.6.2 Setting of “OTHER” variables......................................................................................................35
4.6.3 The COMPENSATE functions.....................................................................................................36
4.7 ACCESS OUTPUT RELAY MENU (OPTIONAL PASSWORD PROTECTION).......................................38
4.8 RUN DIAGNOSTIC TEST SEQUENCE............................................................................................40
4.9 BROWSE TRIP HISTORY LIST..............................................................................................................43
4.10 ACCESS SERIAL PORT OPTIONS (OPTIONAL PASSWORD PROTECTION) .........................................44
4.11 ACCESS PASSWORD SETUP MENU................................................................................................45
4.12 ACCESS MODE SETUP SELECTOR ...................................................................................................46
5 DISPLAY ANNUNCIATION AND SCREEN NAVIGATION.............................................................48
5.1 INTRODUCTION.................................................................................................................................48
5.2 THE LCD SCREEN DISPLAYS DURING NORMAL OPERATION..............................................48
5.2.1 Normal Mode ................................................................................................................................49
5.2.2 “H” CONFIGURATION MODE normal operation screen displays...........................................51
5.3 THE LED INDICATORS.....................................................................................................................52
5.4 THE LCD SCREEN DISPLAY DURING OVERLOAD OR FAULT CONDITION.......................52
5.5 THE LCD POST-TRIP FAULT ANNUNCIATION AND TRIP HISTORY SCREEN DISPLAYS .53
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6 INSTALLATION......................................................................................................................................56
6.1 INTRODUCTION.................................................................................................................................56
6.2 UNPACKING, STORAGE AND HANDLING ..................................................................................56
6.3 MOUNTING .........................................................................................................................................57
6.4 WIRING ................................................................................................................................................57
6.4.1 Auxiliary Power Supply................................................................................................................58
6.4.2 Current Transformer Circuits........................................................................................................58
6.4.3 Output Relay Circuits....................................................................................................................59
6.4.4 Digital Input ..................................................................................................................................60
6.4.5 Earth Connection...........................................................................................................................60
6.5 NOISE ISOLATION.............................................................................................................................61
7 STEP-BY-STEP INSTRUCTIONS FOR INSTALLING, CONFIGURING, TESTING
AND PUTTING INTO SERVICE ...........................................................................................................62
7.1 INTRODUCTION.................................................................................................................................62
7.2 STEP-BY-STEP INSTRUCTIONS......................................................................................................62
8 TROUBLE SHOOTING...........................................................................................................................66
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TABLE OF FIGURES
FIGURE 1: FRONT VIEW AND IDENTIFICATION OF EXTERNAL COMPONENTS .........................67
FIGURE 2: REAR VIEW AND IDENTIFICATION OF EXTERNAL COMPONENTS............................68
FIGURE 3: DIMENSIOINS AND CUTOUT DETAILS ...............................................................................69
FIGURE 4: TERMINAL AND CONNECTION DIAGRAM ........................................................................70
FIGURE 5: ELEMENT RATED CURRENT CONFIGURATION DIAGRAM ..........................................71
FIGURE 6: OUTPUT RELAY CONTACT FORM CONFIGURATION DIAGRAM ................................72
FIGURE 7: PEAK REPETITIVE OVERVOLTAGE vs TIME TRIP CURVES ..........................................73
FIGURE 8: THERMAL OVERLOAD VS TRIP TIME CURVE FOR VARIOUS PRIOR THERMAL
LOADING CONDITIONS..........................................................................................................74
FIGURE 9: APPLICATION EXAMPLE 1 - PROTECTION OF A SINGLE STAR OR DELTA
CONNECTED CAPACITOR BANK, WITH SERIES DAMPING OR FILTER
REACTORS.................................................................................................................................75
FIGURE 10: APPLICATION EXAMPLE 2 - PROTECTION OF A DOUBLE STAR CONNECTED
CAPACITOR BANK, WITH SERIES DAMPING OR FILTER REACTORS........................76
FIGURE 11: APPLICATION EXAMPLE 3: PROTECTION OF AN “H” CONFIGURATION SINGLE
STAR CONNECTED CAPACITOR BANK, WITH SERIES DAMPING OR FILTER
REACTORS.................................................................................................................................77
FIGURE 12: APPLICATION EXAMPLE 4 - PROTECTION OF A HIGH PASS FILTER CIRCUIT
WITH A DOUBLE STAR CONNECTED CAPACITOR BANK ............................................78
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FIGURE 13: APPLICATION EXAMPLE 5 - PROTECTION OF A “C” TYPE HARMONIC FILTER
CIRCUIT WITH A DOUBLE STAR CONNECTED MAIN CAPACITOR BANK, A
FUNDAMENTAL FREQUENCY TUNING SUBSIDIARY CAPACITOR BANK, FILTER
REACTORS AND FILTER RESISTORS..................................................................................79
FIGURE 14: APPLICATION EXAMPLE 6 - PROTECTION OF A “C” TYPE HARMONIC FILTER
CIRCUIT WITH AN “H” CONFIGURATION MAIN CAPACITOR BANK, A
FUNDAMENTAL FREQUENCY TUNING SUBSIDIARY CAPACITOR BANK, AND
STAR CONNECTED FILTER REACTORS AND RESISTORS.............................................80
FIGURE 15: TYPICAL CONNECTION DIAGRAM FOR THE PROTECTION OF A SERIES TUNED
HARMONIC FILTER CIRCUIT WITH A DOUBLE STAR ...................................................81
FIGURE 16: TYPICAL CONNECTION DIAGRAM FOR THE PROTECTION OF AN “H”
CONFIGURATION MODE CAPACITOR BANK WITH DAMPING REACTORS.............82
FIGURE 17: ELEMENT FAILURE ON INTERNALLY OR EXTERNALLY FUSED CAPACITOR
UNITS (DOUBLE STAR)...........................................................................................................83
FIGURE 18: ELEMENT FAILURE ON UNFUSED CAPACITOR UNITS (DOUBLE STAR) ................84
FIGURE 19: ELEMENT FAILURE ON INTERNALLY OR EXTERNALLY FUSED CAPACITOR
UNITS (“H” CONFIGURATION)..............................................................................................85
FIGURE 20: ELEMENT FAILURE ON UNFUSED CAPACITOR UNITS (“H” CONFIGURATION) ...86
FIGURE 21: LOGIC DIAGRAM FOR ELEMENTS 1, 2 AND 3 (NORMAL MODE)...............................87
FIGURE 22: LOGIC DIAGRAM FOR ELEMENT 4 (NORMAL MODE)..................................................88
FIGURE 23: LOGIC DIAGRAM FOR ELEMENT 5 (NORMAL MODE)..................................................89
FIGURE 24: LOGIC DIAGRAM FOR ELEMENTS 2, 3 AND 4 (“H” CONFIGURATION MODE) .......90
FIGURE 25: EFFECT OF PEAK REPETITIVE OVER VOLTAGE RESET TIMER, vc>reset:xt, DURING
INTERMITTANT PEAK REPETITIVE OVER VOLTAGES..................................................91
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FIGURE 26: CONFIGURATION OF OUTPUT RELAYS #1 TO #5 (NORMAL MODE) ........................92
FIGURE 27: CONFIGURATION OF OUTPUT RELAYS #1 TO #5 (“H” CONFIGURATION MODE).93
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TABLE OF APPENDICES
APPENDIX 1: NOMENCLATURE AND DEFINITIONS............................................................................94
APPENDIX 2: GENERAL CHARACTERISTICS.......................................................................................103
APPENDIX 3: TECHNICAL SPECIFICATIONS .......................................................................................104
APPENDIX 4: SETTABLE PARAMETERS AND SETTING RANGES ..................................................106
APPENDIX 5: COMMISSIONING TEST RECORD..................................................................................109
APPENDIX 6: FAULT REPORT..................................................................................................................115
APPENDIX 7: DIAGNOSTIC ERRORS......................................................................................................122
APPENDIX 8: NORMAL MODE CALCULATION OF CHECKSUMS FOR OUTPUT
RELAYS #1 TO #5...............................................................................................................123
APPENDIX 9: “H” CONFIGURATION MODE CALCULATION OF CHECKSUMS FOR OUTPUT
RELAYS #1 TO #5..............................................................................................................124
APPENDIX 10: DEFAULT HARDWARE AND SOFTWARE CONFIGURATION ON DELIVERY:..125
APPENDIX 11: INJECTION TESTING.......................................................................................................128
APPENDIX 12: SETTING EXAMPLE 1 .....................................................................................................129
APPENDIX 13: SETTING EXAMPLE 2 .....................................................................................................133
APPENDIX 14: CALCULATION OF THE REACTOR HEATING AND COOLING TIME
CONSTANT (τ) ...................................................................................................................138
APPENDIX 15: MENU NAVIGATION CHART (NORMAL MODE)......................................................139
APPENDIX 16: MENU NAVIGATION CHART (“H” CONFIGURATION MODE) ..............................140
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1 INTRODUCTION
This manual contains an overview and specification of the RLC Relay for the protection ofcapacitor banks and harmonic filter circuits, as well as detailed installation, setting up,operating, commissioning and maintenance instructions.
As further enhancements are developed, this manual will be expanded and revised toinclude full details of these options.
The user of this manual should have a prior knowledge of capacitor banks and harmonicfilter circuits, power system protection, power system measurements, and power systemsafety procedures.
Before installing, setting up or operating the RLC Relay, the user should study theapplicable sections of this manual, taking particular note of WARNINGS, CAUTIONS andNOTES included for personnel and equipment protection.
Before attempting to trouble-shoot the equipment, the user should thoroughly understandthe entire manual.
For trouble-shooting and commissioning the following equipment is required:
• Digital multi-meter with clip-on current tong for measuring 1A or 5A current transformer(CT) secondaries
• A single phase primary or secondary injection test set.
Due to the nature of the RLC Relay, it is not recommended that the user should attemptrepairs other than the removal and replacement of the drawout unit, which houses allelectrical and electronic parts. Refer to Section 8 for further details.
Faulty RLC Relays should be returned to STRIKE Technologies (Pty) Ltd for testing, and ifnecessary, for repair or replacement of faulty parts, re-calibration and re-testing.
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2 OVERVIEW OF THE RLC RELAY
2.1 INTRODUCTION
The RLC Relay is a numeric, microprocessor based, integrated, and multi-function relay forthe comprehensive protection of medium voltage and high voltage capacitor banks andharmonic filter circuits. In many aspects, the relay is user configurable to cater for a widerange of applications and relay settings and to minimize the number of different relaymodels.
In this way the RLC Relay provides flexibility of application, while remaining botheconomical and easy-to-use.
2.2 APPLICATION
The RLC Relay provides comprehensive protection for the capacitive, inductive andresistive elements of three phase medium voltage and high voltage shunt capacitor banksand harmonic filter circuits. The capacitor banks may have a single star, double star, deltaor “H” CONFIGURATION, with internally fused, externally fused or unfused capacitor units.
The RLC Relay prevents unnecessary trip-outs, only operating when absolutely necessaryto protect the capacitor bank from damage due to fundamental and harmonic overcurrentand overvoltage conditions, and thereby preventing unnecessary financial losses and otherdetrimental consequences due to a trip out of the capacitor bank. In addition, after asystem fault or equipment failure, the RLC Relay trips the associated circuit breakertimeously, to ensure maximum personnel safety, and to minimize further equipment andother consequential damage.
2.3 PROTECTIVE FUNCTIONS PROVIDED BY THE RLC RELAY
2.3.1 Peak repetitive overvoltage protection (Refer to Fig. 21)
The dielectric of a capacitor bank is stressed by the peak repetitive voltage applied to thecapacitor bank. According to the standards, a capacitor bank must be able to withstand arms sinusoidal voltage of 110% of its rated voltage at rated frequency for extended periods.
Thus a capacitor can withstand a peak repetitive voltage of ⋅⋅ 21,1 UN for extended periods.
For peak repetitive voltages above this value, an inverse time capacitor temporaryovervoltage withstand curve defines the time the capacitor can withstand the peak repetitivevoltage before failure. This curve has been derived from the relevant ANSI and IECrecommendations.
In service the peak repetitive voltage is determined by the actual fundamental frequencyvoltage applied to the capacitor, as well as any harmonic voltages superimposed on thefundamental.
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Filter reactors in series with the capacitor bank cause the fundamental frequency voltage atthe capacitor bank terminals to be higher than the fundamental frequency supply voltage.Also, harmonic currents flowing in the capacitor bank cause harmonic voltagessuperimposed on the fundamental voltage, which further increases the peak repetitivevoltage applied to the capacitor bank.
For each phase, the RLC Relay determines the peak repetitive capacitor voltage, vc, usingadvanced digital signal processing techniques, by integrating the measured line currentwaveform, to give a signal representing the voltage waveform applied to the capacitor bank.The peak repetitive voltage of this signal, vc, is then extracted, and compared to anadjustable low-set peak repetitive voltage withstand threshold, vc>. For calculated peakrepetitive voltages above this threshold, a starter signal, vc> start, is output, and the inversetime ANSI capacitor temporary overvoltage withstand curve defines the time before the low-set peak repetitive overvoltage trip signal, vc>trip, is output. In addition, vc is compared toan adjustable high-set threshold, vc>>, with an associated adjustable definite timer, vc>>:xt,to provide a high-set trip output, vc>>trip, if the associated threshold is exceeded for thedefinite time set.
2.3.2 Thermal overcurrent protection (Refer to Fig. 21)
The connections and current paths within a capacitor bank / harmonic filter circuit arestressed thermally by the total rms heating current, Irms, including both the fundamental andharmonic components, flowing in these connections and current paths.
According to the standards, a capacitor bank, and the capacitor units making up the bank,must be rated to withstand continuously a rms current of 130% of rated current. Forcurrents above this threshold, the resulting temperature rise may cause damage to thecapacitor bank and capacitor units.
Similarly, each of the other elements making up the capacitor bank / harmonic filter circuit,including the circuit breaker, feed cable, series damping or filter reactors, and filter resistors,also have an associated continuous rms heating current limit, above which excessivetemperature rise and damage may occur.
For each phase, the RLC Relay protects a capacitor bank / harmonic filter circuit fromexcess rms current stressing, by modeling the thermal response of the circuit to the rmsheating current, Irms. Using advanced digital signal processing techniques; Irms iscontinuously calculated from the measured line currents. A first order exponential thermalmodel and associated adjustable heating / cooling time constant, τ, is then used tocontinuously calculate the thermal current response, Ith, to the rms heating current, Irms.This parameter, Irms as well as Ith are then continuously compared to an adjustablethreshold, Ith>, which is set as the lowest continuous rms heating current rating of the serieselements making up the capacitor bank / harmonic filter circuit. When Irms exceeds thethreshold, Ith>, the thermal overload starter signal, Ith>start, is output, When Ith exceedsthe threshold, Ith>, the thermal overload trip signal, Ith>trip, is output.
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NOTE
Irms reflects the instantaneous value of the Irms heating current, while Ith lags Irmsdepending on τ as set.
2.3.3 Fundamental frequency star point unbalance protection (Refer to Fig. 22)
In a double star connected capacitor bank, the failure of internal capacitor elements, andthe subsequent blowing of internal capacitor element fuses or external capacitor unit fuses,is detected by sensitive monitoring of the star point unbalance current flowing between thetwo star points.
Capacitor banks may be designed to operate for extended periods with a certain number ofblown internal or external fuses. However, once a certain number of fuses have blown, theincrease in voltage across the healthy elements dictates that the capacitor bank should beimmediately disconnected to avoid further progressive element failures and catastrophicdamage.
Even though efforts may be taken to balance a double star connected capacitor bank, byoptimum selection and positioning of the capacitor units making up the bank, the tolerancein capacitance is such that a “natural” fundamental frequency star point unbalance currentflows under normal conditions.
The RLC Relay measures the star point unbalance current and calculates the fundamentalfrequency component, Iub. This is then compensated, in magnitude and phase angle, tozero, to enable further changes, in both magnitude and phase angle, ∆Iub, from the initialuncompensated value, to be determined. The magnitude of ∆Iub is a measure of thechange in capacitance in any leg of a double star capacitor bank arrangement, whereas thephase angle of ∆Iub indicates the leg in which the change in capacitance has occurred.
The magnitude of ∆Iub is continuously compared to an adjustable low-set threshold, Iub>,and high-set threshold, Iub>>, each with an associated adjustable definite timer, Iub:xt andIub>>:xt. For ∆Iub greater than Iub>, a starter signal, Iub>start, is output. In addition,low-set and high-set trip signals, Iub>trip and Iub>>trip, are output, if the associatedthresholds are exceeded for the definite times set.
The advantage of star point unbalance protection is that, unlike line current unbalance, themagnitude and phase angle of ∆Iub is not influenced by unbalanced supply voltageconditions. Therefore the sensitivity of star point unbalance current measurement can bemuch higher than line current unbalance measurement, without spurious tripping caused byunbalanced supply voltages. This sensitivity is often essential for adequate protection oflarger capacitor banks with both internal, external and unfused capacitor arrangements. Inaddition, the star point unbalance protection function provided by the RLC Relay indicates
RLC RELAY (Rev.01.26.09.97) Page 16 of 140
the leg of the double star bank in which the change in capacitance has occurred. This isparticularly convenient for larger capacitor banks with internally fused or unfused capacitorarrangements, to speed up the identification of faulty capacitor units.
2.3.4 Fundamental frequency “H” CONFIGURATION capacitor bank unbalance protection(Refer to Fig. 24)
Similarly, but in an alternative user-configurable operating mode, the RLC Relay providesfundamental frequency “H” CONFIGURATION capacitor bank unbalance protection only.This provides sensitive unbalance protection independently for each phase of a capacitorbank.
For each phase of an “H” CONFIGURATION capacitor bank, the changes in magnitudesand phase angles ∆aIub, ∆bIub and ∆cIub are calculated from the initial “natural”fundamental frequency star point unbalance currents, aIub, bIub and cIub, by digital signalprocessing of the three measured “H” CONFIGURATION unbalance currents.
The magnitudes of ∆aIub, ∆bIub and ∆cIub are continuously compared to adjustable lowsetthresholds aIub>, bIub> and cIub>, and high-set thresholds aIub>>, bIub>> and cIub>>respectively. Each of the low-set thresholds and high-set thresholds has an associatedadjustable low set and high-set definite timer, namely aIub>:xt, bIub>:xt and cIub>:xt andaIub>>:xt, bIub>>:xt and cIub>>:xt. For ∆aIub, ∆bIub and ∆cIub greater than aIub>, bIub>and cIub> respectively, the corresponding starter signal, aIub>start, bIub>start andcIub>start, is output. In addition, low-set trip signals aIub>trip, bIub>trip and cIub>trip, andhigh-set trip signals aIub>>trip, bIub>>trip and cIub>>trip, are output, if the associatedthresholds are exceeded for the definite times set.
The advantage of “H” CONFIGURATION capacitor bank unbalance protection is that,similar to star point unbalance protection, the magnitudes and phase angles of ∆aIub, ∆bIuband ∆cIub are not influenced by unbalanced supply voltage conditions. Therefore thesensitivity of “H” CONFIGURATION unbalance current measurement can be much higherthan line current unbalance measurement, without spurious tripping caused by unbalancedsupply voltages. In addition, this sensitive unbalance protection is now providedindependently for each phase of the capacitor bank, thus making it possible to immediatelyand independently identify the phase and branch in which a change in capacitance hasoccurred. This is particularly convenient for larger capacitor banks with internally fused orunfused capacitor arrangements, to speed up the identification of faulty capacitor units.
2.3.5 Fundamental frequency line current unbalance protection (Refer to Fig. 23)
The monitoring of fundamental frequency line current unbalance provides a means ofdetecting changes in impedance resulting from failures and faults within the capacitive,inductive and resistive elements of a capacitor bank / harmonic filter circuit. These faults orfailures invariably result in an unbalance in the fundamental frequency component of theline currents.
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The RLC Relay calculates the fundamental frequency line current unbalance, Ilub, from thefundamental frequency components of the three phase line currents. Ilub is continuouslycompared with two adjustable thresholds, Ilub> and Ilub>>, each with an associatedadjustable definite timer, Ilub>:xt and Ilub>>:xt. For Ilub greater than Ilub>, a starter signal,Ilub>start, is output. In addition, low-set and high-set trip signals, Ilub>trip and Ilub>>trip,are output if the associated thresholds are exceeded for the definite times set.
The sensitivity of line current unbalance protection is limited by the effect of supply voltageunbalance on the line currents. Nevertheless, line current unbalance protection is useful asback-up protection to star point unbalance protection, as well as for early detection of filterresistor and reactor faults, and for early detection of capacitor element failures in smallercapacitor banks, in single star or delta connected arrangements, where star pointunbalance protection is not provided.
2.3.6 Fundamental frequency earth fault protection (Refer to Fig.23)
The RLC Relay calculates the fundamental frequency residual or earth fault current, Io, asthe magnitude of the vector sum of the three fundamental frequency components of thethree phase line currents. Io is compared with two adjustable thresholds, Io> and lo>>,each with an associated adjustable definite timer, Io>:xt and Io>>:xt. For Io greater thanIo>, a starter signal, Io>start, is output. In addition, low-set and high-set trip signals, Io>tripand Io>>trip, are output if the associated thresholds are exceeded for the definite times set.
2.3.7 Fundamental frequency overvoltage and overcurrent protection (Refer to Fig. 21)
For each phase, the RLC Relay calculates the fundamental frequency component, I1, of theline current. I1 is continuously compared with two adjustable thresholds, I1> and I1>>, eachwith an associated adjustable definite timer, I1>:xt and I1>>:xt. For I1 greater than I1>, astarter signal, I1>start, is output. In addition, low-set and high-set trip signals, I1>trip andI1>>trip, are output if the associated thresholds are exceeded for the definite times set.
In the absence of any equipment failures or system faults, the fundamental frequency linecurrents flowing in a shunt connected capacitor bank / harmonic filter circuit is proportionalto the fundamental frequency supply voltage.
The low-set fundamental frequency overcurrent threshold is typically set a little higher thanthe current that would flow at the maximum system voltage, e.g. at say 107,5% of nominal,with a fairly long definite time setting of, say 300 seconds. This protects the capacitorbank/harmonic filter circuit from an abnormally high supply voltage, in excess of thedeclared maximum system voltage.
A fundamental frequency line current much higher than that which would normally flow atthe maximum system voltage, indicates a catastrophic phase-to-phase, three phase orphase-to-earth fault, or major equipment failure, requiring immediate disconnection of thecapacitor bank / harmonic filter circuit. Therefore the high-set fundamental frequencyovercurrent threshold is typically set at, say 150% of nominal, with a definite time delaysetting of zero (no intentional delay).
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2.3.8 Fundamental frequency undercurrent protection (Refer to Fig. 21)
If the mains power supply should fail, while the capacitor bank / harmonic filter circuitbreaker is on, then it is prudent to trip the capacitor bank / filter circuit breaker. Afterrestoration of the mains supply, the capacitor bank can then be re-energized undercontrolled conditions, after the system load has been re-established. In certain cases thiscan help to avoid over correction and excessive system voltage rise, due to load rejectionduring the mains power dip.
For each phase, the RLC Relay calculates I1, the fundamental frequency component of theline current. I1 is continuously compared with an adjustable undercurrent threshold, I1<,and associated adjustable definite timer, I1<:xt. With the capacitor bank / harmonic filtercircuit breaker on, if the mains power supply fails, as indicated by a drop in I1 below I1< forlonger than the definite time set, then the undercurrent trip signal, I1<trip, is output.
2.3.9 Breaker fail protection (Refer to Fig. 21)
If I1 remains above 10% of rated In, for longer than the adjustable definite time, Bfail1<:xt,after a trip output signal has been given by the RLC Relay (regardless of the digital input),then this indicates a major failure of the capacitor bank / harmonic filter circuit breaker, andthe breaker fail signal, Bfail1, is output.
In addition to the above, if I1 remains above 10% of rated In, for longer than the adjustabledefinite time, Bfail2<:xt, after the breaker switches off (digital input indicates the breakeropen/close status), then this indicates a major failure of the capacitor bank / harmonic filtercircuit breaker, and the breaker fail signal, Bfail2, is output.
Both signals can be used trip to an upstream breaker.
2.3.10 Capacitor bank re-switching protection (Refer to Fig 23)
When a capacitor bank / harmonic filter circuit breaker switches off for any reason, it shouldnot be re-energized until the capacitor bank has discharged, to prevent severe and stressfulvoltage and current transients due to the application of mains supply voltage onto a chargedcapacitor bank.
In most cases, after de-energization, discharge resistors built into the capacitor units willdischarge the stored capacitor voltage to less than 50 V within 5 minutes ofde-energization. Alternatively, external rapid discharge chokes may be fitted for fasterdischarge.
The RLC Relay provides the necessary logic, and a breaker enable output signal, Bena, toinhibit the re-energization of the capacitor bank / harmonic filter circuit breaker, for anadjustable definite time, Bena:xt, since de-energization. Bena is normally at logic 1 (high),goes to logic 0 (low) when the circuit breaker switches off, and reverts to logic 1 (high) adefinite time (typically set as 5 minutes) thereafter.
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2.4 Measuring and protection elements
Four dual 1A/5A current measuring elements are provided within the RLC Relay.
Elements 1,2 and 3 are normally used to measure the three phase line currents of thecapacitor bank and series reactors, via three line current transformers, with 1A or 5Asecondaries.
In addition, where applicable, elements 1, 2 and 3 of a separate RLC Relay may be used tomeasure the three phase line currents of the filter resistors, via three resistor line currenttransformers, with 1A or 5A secondaries.
Element 4 is normally used to measure the star point unbalance current of a three phase,double star connected capacitor bank, via a star point unbalance current transformer, with a1A or 5A secondary, connected between the two star points.
The functionality, settings, and binary output signals of elements 1, 2 and 3 are identical,and provide peak repetitive overvoltage protection, thermal overcurrent protection,fundamental frequency overvoltage and overcurrent protection, fundamental frequencyundercurrent protection, and breaker fail protection.
The functionality of element 4 provides fundamental frequency star point unbalanceprotection for a double star connected capacitor bank.
In addition, from the three phase fundamental frequency line current vectors, calculated byelements 1, 2 and 3, a software element 5 further calculates and provides fundamentalfrequency earth fault protection and fundamental frequency line unbalance currentprotection.
Furthermore, software element 5 provides discharge timer logic to inhibit the re-energizationof the capacitor bank / harmonic filter circuit breaker, for an adjustable definite time afterde-energization.
In an alternative user-configurable operating mode, the RLC Relay provides fundamentalfrequency “H” CONFIGURATION capacitor bank unbalance protection only. This providessensitive unbalance protection independently for each phase of a capacitor bank.
In this mode, element 1 measure the “a” phase line current of the capacitor bank (as areference phase), while elements 2, 3 and 4 measure the “H” CONFIGURATION unbalancecurrents of phases “a”, “b” and “c”, respectively.
Refer to Appendix 3 and Section 3.5 for further details.
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2.5 Relay outputs
The RLC Relay has six relay outputs.
The functionality of output relays 1 to 5 is user configurable. The user may program therelay contacts to be latching or non-latching and the output relays to be normally energizedor normally de-energized during the power-up healthy condition. In addition, the user maydirect any of the binary output signals of elements 1 to 5 to output relays 1 to 5.
Output relay 6 is the self-supervision relay for the RLC Relay, and its functionality is notuser configurable. Output relay 6 is energized in the power-up, normal condition, andde-energizes on loss of auxiliary power supply, or on failure of the RLC Relay internalpower supply, microprocessor hardware, software or memory.
Refer to Appendix 3 and Section 3.6 for further details.
2.6 Contact forms
Output relays 1 to 6 each have one changeover (form C) contact. As default, output relays1 to 6 are supplied with the normally open (relay de-energized) contacts wired to theterminal block. However, the user may easily change any or all of the contacts of outputrelays 1 to 6 wired to the terminal block to be normally closed, as required by theapplication. (The full changeover contact of an output relay cannot be wired to the terminalblock, only the N/O or N/C contact.)
Refer to Appendix 3 and Section 3.6 for further details.
2.7 Auxiliary power supply
A high efficiency, low loss, wide range ac/dc auxiliary power supply is provided within theRLC Relay. Special care has been taken to minimize the overall standing load of the RLCRelay on the dc station batteries or ac busbar voltage transformers.
The RLC Relay caters for auxiliary supply voltages of nominal values between 30 V and250 V ac/dc.
Other power supply voltages may be available. Please consult STRIKE Technologies (Pty)Ltd for further details.
Refer to Appendix 3 for further details.
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2.8 LED indicators
Three LED indicators are provided on the front panel of the RLC Relay:
• Green LED: POWER ON / HEALTHY – This indicates that the auxiliary power supply ison, and the self-supervision output relay is energized, indicating that the protection relayis healthy.
• Yellow LED: ALARM – This indicates that one (or more) of the “starter” binary outputsignals of elements 1 to 5 is at logic 1 (high), and that the protection relay may trip if thefault condition persists.
• Red LED: TRIP – This indicates that a trip condition has occurred that has not yet beenreset and / or acknowledged.
Refer to Appendix 3 and Section 5.3 for further details.
2.9 LCD display
A two line, 16 character, full alpha-numeric, back-lit, Liquid Crystal Display (LCD) isprovided on the front panel of the RLC Relay for the following purposes:
• During normal relay operation – the display of various measured and calculatedparameters, together with the low-set thresholds associated with these parameters, forelements 1 to 5, including the peak repetitive capacitor voltages, the rms heating linecurrents, the thermal response line currents, the fundamental frequency components ofthe line currents, the fundamental frequency star point unbalance current, thefundamental frequency line current unbalance, and the fundamental frequency residual(earth fault) current.
• After a relay trip condition – annunciation of all the fault conditions after a trip, includingthe value of the fault currents and voltages at the instant of trip, and the relay trip timeafter commencement of the fault condition.
• During relay configuration and normal relay operation – display of the current andvoltage thresholds and timer settings for each element, and display of each output relayconfiguration and checksum.
• During relay configuration – interactive configuration of the protection relay.
• During testing of the protection relay – interactive self-testing of the protection relay.
• In the event of the RLC Relay failure – annunciation of any protection relay hardware,software or memory failures detected during self-testing of the RLC Relay, by displayingthe relevant error codes. Refer to Appendix 3 and Section 5 for further details.
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2.10 Housing and terminals
The RLC Relay is housed in a draw-out chassis within a fixed case. This housing isparticularly suitable for both flush mounting and 19 inch rack mounting. The cases aredesigned for use indoors, in tropical climates, and are designed to withstand shock,vibration and the ingress of dust and moisture.
A terminal block, with 28 recessed terminals, is provided on the fixed case. Standard screwterminals, or fast-on connectors, can be used, for external connections.
Withdrawing the protection relay module automatically short-circuits the current transformerterminals.
Two phosphor bronze earth continuity strips are riveted to the draw-out chassis and makecontact with the earth strips in the fixed case.
Refer to Section 3.3 and 3.4 for further details.
2.11 Keypad
A five-button keypad is provided on the front panel of the RLC Relay for the followingpurposes:
• Interactive configuration of the protection relay
• Acknowledgement and resetting of trip conditions
• Hardware diagnostic testing
Refer to Appendix 3 and Section 4 for further details.
2.12 Digital input
The RLC Relay is provided with an optically isolated, binary (on / off), voltage input channel,to receive an external contact signal. Any voltage from 24 – 250 V ac/dc applied to thisinput channel will cause the digital input to be on (logic 1).
Depending on the RLC Relay configuration the digital input can be used either as:
• A breaker on (Bon) signal from a normally open auxiliary contact on the associatedcircuit breaker, to signal whether the breaker is open or closed. This signal is used bythe undercurrent protection, breaker fail protection and discharge timer logic functions ofthe RLC Relay.
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• or a remote reset signal from a normally open reset push button, to acknowledge a tripcondition and / or reset any latched trip relays after a fault trip. Refer to Appendix 3 andSection 4.6.2 for further details.
2.13 Test facilities
While the RLC Relay is in service, it continuously performs various self-testing functions,and if any errors or failures are detected, the corresponding error code(s) will be displayed,and the self-supervision output relay will de-energize, to signal the malfunction. Theseself-tests include tests of the processors, RAM, EPROM and EEPROM.
In addition, a further set of hardware diagnostic tests may be performed on the RLC Relayby the user, to test and check the functionality of the digital input, relay outputs, keypad,LCD display and LED’s.
Refer to Section 4.8 for further details.
2.14 Serial data input / output port
The RLC Relay is provided with an RS232 or RS485 serial data port for datacommunications between an intelligent host device and the RLC Relay.
The RS232 port enables point-to-point communications between a host and a single RLCRelay, either directly over a distance of about 10m, or via MODEM.
The RS485 port enables multipoint communications between a host and up to 32 RLCRelays, multi-dropped on a 2 wire fieldbus, over a distance of about 1km.
The serial data port is used for the following purposes:
• Downloading to the RLC Relay of a set-up, including all threshold settings, timer settingsand output relay configuration settings for the RLC Relay.
• Uploading from the RLC Relay of the set-up currently active within the RLC Relay.
• Uploading from the RLC Relay of alarm and trip annunciation messages, including thevalue of the fault currents and voltages at the instant of trip, and the relay trip time aftercommencement of the fault condition, for the last five trip sessions.
• The uploading from the RLC Relay of various instantaneous parameters, measured andcalculated by the relay during normal operation, including the peak repetitive capacitorvoltages, the rms heating line currents, the thermal response line currents, thefundamental frequency components of the line currents, the fundamental frequency starpoint unbalance current, the fundamental frequency line current unbalance, and thefundamental frequency residual (earth fault) current.
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• Other functions, such as remote acknowledgement/resetting of trip conditions andcompensation of residual unbalances.
2.15 PC based software package
A WINDOWS based software package is available for the RLC Relay to exploit itscommunications facilities. This software package enables the user to create, edit, save,open and print any number of the RLC Relay set-up files on a PC, and to download orupload a set-up file to or from the RLC Relay, either directly or via MODEM. In addition, allthe other facilities and functions of the serial data port, as detailed above, can be exploitedusing this software package.
2.16 Available types
Due to the user configurable and flexible nature of the RLC Relay, the model options areminimized. This reduces stockholding requirements, minimizes lead times and reducesspares requirements.
When ordering the RLC Relay it is not necessary to know the final output relay functionalityand contact form, or the rated currents (1A or 5A) of measuring elements 1 to 4.
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RLC Relay types:
NOTE
Not all the RLC Relay types may be in production or available atshort notice. Please contact STRIKE Technologies (Pty) Ltd for
further details and to obtain a confirmed delivery date.
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2.17 General characteristics
Refer to Appendix 2 for the general characteristics of the RLC Relay.
2.18 Technical specifications
Refer to Appendix 3 for the Technical specifications of the RLC Relay.
2.19 Settable parameters and setting ranges
Refer to Appendix 4 for the settable parameters and setting ranges of the RLC Relay.
2.20 Dimensions and cut-out details
Refer to Fig. 3 for dimensions and cutout details of the RLC Relay.
2.21 Terminal diagram and connections
Refer to Fig. 4 for the terminal and connection diagram applicable to the RLC Relay.
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3 RLC RELAY HARDWARE DETAILS
3.1 INTRODUCTION
This section provides various hardware and mechanical details of the RLC Relay relevant tothe user. These include various mechanical details as well as various details relating toconfiguration by the user of the measuring element rated currents (1A or 5A), and theoutput relay contact forms (normally open or normally closed).
3.2 NOMENCLATURE AND IDENTIFICATION OF EXTERNAL COMPONENTS
Refer to Fig. 1 and Fig. 2 for front and rear views of the RLC Relay and for identification ofexternal components.
3.3 ENCLOSURE AND DRAW-OUT UNIT
The RLC Relay is housed in a draw-out chassis within a fixed case. This housing isparticularly suitable for both flush mounting or 19 inch rack mounting. The cases aredesigned for use in tropical climates, and are designed to withstand shock, vibration and theingress of dust and moisture.
Two phosphor bronze earth continuity strips are riveted to the draw-out chassis and makecontact with the earthing strips in the fixed case.
In order to remove the draw-out chassis, unscrew by a quarter turn the bottom catch of theremovable front cover and remove. Then firmly and slowly pull the draw-out handle on thefront fascia plate to remove the draw-out chassis of the RLC Relay.
In order to insert the draw-out chassis into the fixed case carefully align the guide rails onthe draw-out chassis with the corners of the fixed case. Then firmly and slowly push thehandle on the front fascia plate to insert the draw-out chassis into the fixed case. When thechassis is almost fully inserted, an extra resistance will be felt as the moving contacts on thedraw-out chassis mate with the fixed contacts of the fixed case. At this point, press thehandle very firmly to fully insert the draw-out chassis. Then replace the front cover byhooking the top catch over the clip on the fixed case. Align the front cover and refasten thebottom catch by a quarter turn.
CAUTION
The RLC Relay incorporates static sensitive devices. However the electronic circuitsare well protected by the fixed metal case. Therefore do not withdraw the draw-out
chassis unnecessarily. Refer to Section 6.2 for further details on handling of thedraw-out chassis when removed from the fixed case.
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3.4 TERMINALS
A terminal block, with 28 recessed terminals, are provided on the fixed case. Standard M4screw terminals, or fast-on connectors, can be used on the terminal block for connections tothe protection relay.
Removing the draw-out chassis from the fixed case automatically short circuits the currenttransformer field terminals, before breaking contact with the draw-out chassis, and ensuresthat the current transformer circuits are not open circuited during and after removal.
Refer to Fig. 2 and Fig. 4 for details of the terminal layout and terminal connection diagram.
3.5 MEASURING ELEMENTS
Four user configurable dual 1A/5A current measuring elements are provided within the RLCRelay.
As default, the RLC Relay is supplied with each measuring element pre-configured for a 5Anominal rated current (In = 5A).
However the user may easily change any or all elements to have a 1A nominal ratedcurrent, as required by the application.
To do this, withdraw the draw-out chassis from the fixed case as detailed in Section 3.3,taking note of the handling requirements of Section 6.2. Then, referring to Fig. 5, identifythe 1A and 5A selection links for elements 1, 2, 3 and 4, on the Analog / Power supplyprinted circuit board. Move the link to the desired position for each element, to select arated current of 1A or 5A for each element.
WARNING
Extremely hazardous high voltages can appear across the CT secondaries if the CTsecondary current is open circuited. Therefore carefully ensure that the selection
links are properly in place for each measuring element before re-inserting the draw-out chassis into the fixed case, otherwise the CT circuits will be open circuited as the
draw-out chassis is inserted.
CAUTION
Be absolutely sure that the rated currents selected for each element correspond tothe CT secondary rated current.
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NOTE
After changing the rated current selection terminals for one or more elements, besure to change the rating plate details of the RLC Relay to reflect the changed
nominal rated current, In, for the affected elements.
3.6 RELAY OUTPUTS
The RLC Relay has six relay outputs.
The power up normal state of output relays #1 to #5 is user configurable i.e. normallyenergized or normally de-energized.
The reset state of output relays #1 to #5 are also user configurable i.e. self reset or handreset (latched).
Output relay #6 is the RLC Relay self-supervision relay, and is energized in the power-upnormal condition, and de-generizes on loss of auxiliary power supply, or on failure of theRLC Relay internal power supply, microprocessor hardware, software or memory.
Output relays #1 to #6 have one-changeover contact each. As default the RLC Relays aresupplied with the normally open contacts wired to the terminal block. However the usermay easily change any or all of the output contacts of output relays #1 to #6 wired to theterminal block to be normally closed, as required by the application.
To change the contact forms of output relays #1 to #6, withdraw the draw-out chassis fromthe fixed case as detailed in Section 3.3, taking note of the handling requirements ofSection 6.2.
Then, referring to Fig. 6, identify the output relay contact form selection links for relays #1 to#6. Move the links to the desired position for each output relay contact, to select a contactform of N/O or N/C for each output relay contact.
WARNING
Be absolutely sure that the contact forms selected for the output relay contacts arecorrect for the application, and that the links are properly in place for each output
relay contact before re-inserting the draw-out chassis into the fixed case, otherwisethe desired protection may not be provided. Confirm that the contact forms selected
are correct by performing the diagnostic test function.
Refer to Section 4.4 and Section 4.7 for further details.
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4 KEYPAD OPERATIONS
4.1 INTRODUCTION
This section provides details of user keypad operations and the interactive relay screendisplays, when executing the various relay functions, including:
• Accessing the normal operation screen displays
• Executing any main menu or sub-menu functions
• Reverting back from the main menu functions to the default normal operation screendisplay
• Access PARAMETER SETUP menu
• Setting of element variables
• Setting of OTHER variables
• Compensating of unbalance currents
• Access output relay menu
• Run DIAGNOSTIC TEST sequence
• Browse TRIP HISTORY list
• Access SERIAL PORT options
• Access PASSWORD SETUP menu
• Access MODE SETUP selector
4.2 ACCESSING THE NORMAL OPERATION SCREEN DISPLAYS
After power-up, pressing the Á, Â, ¿, À keys allows the user to access all the normaloperation screen displays. Refer also to section 6.2 for further details.
4.3 ACCESSING THE MAIN MENU FUNCTION
During normal relay operation, press the ¿ & À keys simultaneously for 5 seconds.
Any trip condition must first be cleared before the operator can access the main menu. If atrip occurred while the operator is busy in the setup or any other menu, the trip condition willbe logged and on returning from the menu, the trip display will activate.
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If the RLC Relay password code has not been changed from the default code (000000),then the user will now have access to the main menu, and the first of the main menufunctions will be displayed.
However if the user has changed the default password code to any number other than000000, then at this point the following screen will be displayed:
Type Password000000
Pressing the ¿ or À key moves the cursor to the left or right.
Pressing the Á or  key increments or decrements the digit at the cursor.
Therefore using the Á, Â, ¿, À keys, the correct password code can be entered by theuser.
Once the correct password has been entered, press the red ACCEPT key to return to themain menu.
NOTE
Only the correct password code will allow access to the settable parameters in thesub menu’s.
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Pressing the ¿ or À key will scroll through the other main menu functions as shown:
MAIN MENU FUNCTION KEYPAD OPERATION
Access PARAMETERSETUP menu
Press ¿ or À key
Access OUTPUTRELAY menu
Press ¿ or À key
Run DIAGNOSTICTEST sequence
Press ¿ or À key
Browse TRIPHISTORY list
Press ¿ or À key
Access SERIALPORT options
Press ¿ or À key
Access PASSWORDSETUP menu
Press ¿ or À key
Access MODESETUP selector
Press ¿ or À key
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4.4 EXECUTING ANY MAIN MENU OR SUB-MENU FUNCTIONS
After selecting and displaying the desired main or sub-menu function as detailed in Section4.3 using the ¿ or À key will select the desired main or sub-menu function. Then press the key to access the selected function.
4.5 REVERTING BACK FROM THE MAIN MENU FUNCTIONS TO THE DEFAULT NORMALOPERATION SCREEN DISPLAY
When any one of the main menu function screen displays is being shown (refer to Section4.3) the user can revert back to the default normal operation screen display by pressing the¿ and À keys simultaneously.
4.6 ACCESS PARAMETER SETUP MENU (Optional password protection)
From the main menu, select the “Access PARAMETER SETUP menu” using the ¿ or Àkeys (Refer to Section 4.3). Then execute this function by pressing the  key (Refer toSection 4.4).
The first of the PARAMETER SETUP sub-menu functions will be displayed.
Pressing the ¿ or À key will scroll through the other sub-menu functions, which dependingon the operation mode of the RLC Relay, will be displayed as follows:
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NORMAL MODE OPERATION “H” CONFIGURATION OPERATION
Set ELEMENT1, 2, 3 variables
Press ¿ or À key Set ELEMENT2, 3, 4 variables
Press¿ or À key
Set ELEMENT4 variables
Press ¿ or À key COMPENSATE foraIub
Press ¿ or À key
Set ELEMENT5 variables
Press ¿ or À key COMPENSATE forbIub
Press ¿ or À key
Set OTHERfunctions
Press ¿ or À key COMPENSATE forcIub
Press ¿ or À key
COMPENSATE forstar unbalance
Press ¿ or À key
To execute any of the above sub-menu functions, select the desired sub-menu functionusing the ¿ or À key, and then execute using the  key.
After accessing any of the parameter set-up functions and making any element setting,other setting or compensation of the unbalance currents, press the red ACCEPT key torevert back to the main menu.
The user will be presented with 3 choices:
• Resume
• Save
• Cancel
Press the Á or  key to select one of the above.
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If Resume is selected, then pressing the red ACCEPT key will return the relay to the set-upmode, to allow the user to further modify the set-up parameters.
If Save is selected, then pressing the red ACCEPT key will save the new settings andchange the old settings to the new settings, and return to the main menu.
If Cancel is selected, then pressing the red ACCEPT key will abort and return to the mainmenu without saving the new settings or changing the old settings to the new settings (ie.the new settings will be discarded).
NOTE
It should be noted that while the RLC Relay is in the set-up mode, all the protectivefunctions are still active and thus full protection is still provided, using the
previously saved set-up parameters.
4.6.1 Setting of “ELEMENT” variables
After selecting any of the “Set ELEMENT (1, 2, 3, or 4) Variables” functions, press the Âkey to access the relevant element’s variables.
Then press ¿ or À to scroll through the list of element variables. Once the desired elementvariable is displayed, press the Á or  key to increment or decrement the setting value.
When set as desired press the ¿ or À key to select the next element variable.
Proceed as previous until all the element variables have been set as desired.
Refer to Appendix 4 for a complete list of settable element variables and the relevant settingranges.
To disable an element variable, scroll the setting value until the mnemonic changes to “N/A”(not available).
When all the “element” variables have been set as desired, press the red ACCEPT buttonto revert back to the PARAMETER SET UP sub-menu.
4.6.2 Setting of “OTHER” variables
After selecting “Set OTHER functions”, press the  key to access a list of the four “OTHER”settings. Pressing the ¿ or À key scrolls through these four “OTHER” setting variables.When the selected “OTHER” variable is being displayed, pressing the Á or  keyincrements or decrements the setting value or scrolls through the available setting options.
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The four “OTHER” setting variables are:
• The functionality of the digital input to the RLC Relay. This can be either “Disabled” ifthe digital input is not being used, or set as a Breaker on, Bon, signal or as a “Remote-Reset”.
• The breaker fail timer, Bfail1 can be set from 0.05 to 2 seconds to provide breaker failprotection if a trip has occurred and the fault condition has not been removed within theBfail1 timer setting.
• The breaker fail timer, Bfail2 can be set from 0.05 to 2 seconds to provide breaker failprotection. If the digital input is used to detect the open/close status of a breaker andthe input shows the breaker is open and the I1 current has not fallen below 10% of Intrip signal will be generated.
• The breaker enable timer, Bena:xt, can be set from 0 to 600 seconds to providecapacitor bank re-switching protection when the digital input is set as a Breaker on, Bon,signal. This function may be disabled if desired.
When the “OTHER” variables have been set as desired, press the red ACCEPT button torevert back to the PARAMETER SETUP sub-menu.
4.6.3 The COMPENSATE functions
Compensation of the star point unbalance current, or the “H” CONFIGURATION unbalancecurrents, should only be done after the relevant capacitor bank or filter circuit is in service.
The RLC Relay measures the fundamental frequency star point unbalance current or the“H” CONFIGURATION unbalance currents, depending on the mode settings.
The natural unbalance currents (which flow as a result of normal capacitance tolerances)can be compensated, in magnitude and phase angle, to zero. This enables any furtherchanges, in both magnitude and phase angle, ∆Iub, from the initial uncompensated value,to be determined.
After selecting and displaying the COMPENSATE function press the  key to execute. Atthis point the compensation vector is displayed.
When the unbalance current is uncompensated the compensation vector is the null vectoras shown below:
comp. vector0% ∠ 0.0°
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When the unbalance circuit is compensated the compensation vector is typically shown as:
comp. vector2% ∠ 32.3°
After compensation, the compensation vector has the same magnitude as the initialmeasured fundamental frequency unbalance current at the instant of compensation, buthas the opposite polarity (i.e. is 180° out of phase).
Pressing the À key then displays the calculated unbalance current either in absolute terms,(if uncompensated) or in relative terms, ∆Iub, if compensated.
Iub 2% ∠ 112.3°Compensate? No
Pressing the  or Á key toggles between “No” and “Yes”.
When “No” is selected, pressing the red ACCEPT key again, reverts back to thePARAMETER SETUP sub-menu.
If “Yes” is selected, pressing the red ACCEPT key again, executes the COMPENSATIONfunction.
Immediately after compensation ∆Iub will always be the null vector.
However, after compensation any subsequent change in capacitance will cause ∆Iub toassume a non-zero magnitude and some phase angle ranging from 0° to 360°.
The magnitude of ∆Iub is a measure of the change in capacitance in any leg of the doublestar or “H” CONFIGURATION capacitor bank arrangement. The phase angle of ∆Iubindicates he leg in which the change in capacitance has occurred.(Refer to Fig. 17 to Fig. 20).
Pressing the À key again displays
UncompensateNo
Pressing the  or Á key toggles between “No” and “Yes”.
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When “No” is selected, pressing the red ACCEPT key again reverts back to thePARAMETER SETUP sub-menu.
If “Yes” is selected, pressing the red ACCEPT key again, executes the UNCOMPENSATEfunction and reverts to the previous “Compensate?” display.
4.7 ACCESS OUTPUT RELAY MENU (Optional Password Protection)
From the main menu, select the “Access OUTPUT RELAY menu” using the ¿ or À key(Refer to Section 4.3). Then execute this function by pressing the  key (Refer to Section4.4).
Pressing the ¿ or À key now scrolls a cursor back or forward through a series of settingoptions and screens. At each cursor position, the user can select the relevant settingoptions to be “0” or “1”, using the Á or  key.
These setting options are used to configure each of the output relays #1 to #5 in terms of:
• whether a software output signal is directed (select “1”) or not directed (select “0”) tooutput relays #1 to #5.
Example:
Relay : #12345I1>>trip 11000
The I1>>trip software output signal is directed to operate relay #1 and #2
• whether output relays #1 to #5 energize (select “1”) or de-energize (select “0”) to trip.
Example:
Energise #12345To trip 11000
Output relay #1 and #2 energize to trip and relays #3 to #5 de-energize to trip
• whether output relays #1 to #5 latch on tripping (Select “1”), or are self-resetting (Select“0”).
Example :
Latch #12345On trip 11000
Output relay #1 and #2 latch on tripping, and relays #3 to #5 are self-resetting
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• after setting all of the output relay options, pressing the À key displays the relaychecksums, calculated for the particular output relay settings selected for relays #1 to#5.
Example:
Relay #2 Checksum200002
For each possible configuration of output relay #1, #2, #3, #4, and #5 a unique 6 digithexadecimal check sum is calculated by the RLC Relay as shown in Appendix 8 andAppendix 9.
By comparing the check-sums calculated by the RLC Relay, with the correct checksumscalculated by the user for the desired output relay configuration, the user can confirm thatthe relay has been configured correctly.
After configuring the output relays and viewing the check-sums to verify that they have beenconfigured correctly, press the red ACCEPT key to revert back to the main menu.
The user will be presented with 3 choices:
• Resume
• Save
• Cancel
Press the Á or  key to select one of the above.
If Resume is selected, then pressing the red ACCEPT key will return the relay to the set-upmode, to allow the user to further modify the set-up parameters.
If Save is selected, then pressing the red ACCEPT key will save the new settings andchange the old settings to the new settings, and return to the main menu.
If Cancel is selected, then pressing the red ACCEPT key will abort and return to the mainmenu without saving the new settings or changing the old settings to the new settings (ie.the new settings will be discarded).
NOTE
It should be noted that while the RLC Relay is in the set-up mode, all the protectivefunctions are still active and thus full protection is still provided, using the
previously saved set-up parameters.
RLC RELAY (Rev.01.26.09.97) Page 40 of 140
4.8 RUN DIAGNOSTIC TEST SEQUENCE
On application of auxiliary supply voltage, and at regular intervals during normal operation,the RLC Relay performs a number of diagnostic checks of the:
• EEPROM• Calibration factors• Configuration set-up• EPROM• RAM• Processors
Any errors detected will cause the RLC Relay to suspend protective functions, de-energizethe self-supervision relay and display an error message as detailed in Appendix 7.
In addition, during commissioning, while in normal service, or in the test laboratory, a seriesof diagnostic tests may be performed by the user.
These tests enable the user to check:
• The serial number• The software version• The production pre-test status• The LCD screen• The LED’s• The digital input• The output relays
It is deemed unnecessary to do a specific test of the RLC Relay keypad, because theoperation of the keypad is implicitly checked by the user in performing this series ofdiagnostic tests.
All protective functions are fully operational while performing the above series of diagnostictests, except during the testing of the output relays.
NOTE
Also, testing of the output relays while the RLC Relay is in normal service, with theassociated circuit breaker energized, may cause the breaker to trip. This is because
the output relays sequentially energize for 1 second during the output relay test.
Therefore, before performing the output relay test, the user is given the option to skip thistest.
RLC RELAY (Rev.01.26.09.97) Page 41 of 140
From the main menu, select the “Run DIAGNOSTIC TEST sequence” using the ¿ or Àkeys (Refer to Section 4.3) then execute this function by pressing the  key (Refer toSection 4.4)
Pressing the ¿ or À key now scrolls through various diagnostic test screens as follows:
Serial Number97120045
Press the À key
This screen enables the user to verify that the serial number embedded in the RLC Relaycorresponds with that engraved on the fascia plate
Software Version1.05 06-04-02
Press the À key
The first 3 digits indicate the software version number.
The next 3 digits refer to changes made, to either the User Interface, the Protectionsoftware module, or the DSP code.
Pretest CodePassed
Press the À key
This screen shows the results of a series of factory tests by STRIKE Technologies (Pty) Ltdprior to dispatch. The pre-test results are stored in EEPROM in the RLC Relay. If theabove screen displays anything other than that shown above, this indicates a faultcondition, and the RLC Relay should be returned at once to STRIKE. Technologies (Pty)Ltd.
g g g g g g g g g g g g g g g g
g g g g g g g g g g g g g g g g
Press the À key
This screen causes every pixel of the LCD display to operate, allowing the user to identifyany faulty lines or segments on the LCD screen.
RLC RELAY (Rev.01.26.09.97) Page 42 of 140
Test: : LED’s(Check flashing)
Press the À key
This screen enables the user to check that the LED indicators work by checking that theyflash during this diagnostic test.
Test: : InputInput = OFF
Press the À key
This screen enables the user to check that the digital input is functional. When a voltagewithin the range 24 – 250 V ac/dc is applied to the digital input terminals, the above displayshould change from OFF to ON.
Test Relays ? NoCAUTION ! !
Press the ¿, À, Á, Â key
WARNING
Performing the diagnostic test on the output relays, while the associated circuitbreaker is energized may cause the circuit breaker to trip, with consequent systemdisruption. Therefore the greatest care should be exercised when performing this
function under live conditions.
If the user wishes to skip the output relay test, simply press the ¿ or À key to move back orforward through the other diagnostic tests.
If the user wishes to perform the output relay tests, press the Á or  key to toggle the “No”to “Yes”, then press the red ACCEPT key.
A screen as shown below will be displayed:
Test Relay #1No
Press the ¿ or À key to select the desired relay to test (relays #1 to #5).
RLC RELAY (Rev.01.26.09.97) Page 43 of 140
Then press the Á or  key to toggle the “No” to “Yes”.
Then press the red ACCEPT key. The selected output relay will then energize for 1second.
Press the ¿ or À key to select the next relay to test.
Repeat as above until all the relays have been tested.
Then press the ¿ or À key until the following screen is displayed:
Return to MENUNo
Press the Á or  key to toggle the “No” to “Yes”.
Then press the red ACCEPT key.
The first screen in the DIAGNOSTIC TEST MENU is now displayed again.
Press the red ACCEPT key again to revert back to the main menu.
4.9 Browse TRIP HISTORY list
When the fault has been cleared after a trip event, a set of post-trip annunciation data isrecorded in the TRIP HISTORY list.
The TRIP HISTORY list records the post-trip annunciation data for the last 5 trip events,with No. 1 being the most recent.
Refer to Section 5.5 for further details.
From the main menu, select: “Browse TRIP HISTORY list” using the ¿ or À keys (Refer tosection 4.3).
Then execute this function by pressing the  key (Refer to Section 4.4).
Pressing the ¿ or À key now scrolls through the last 5 TRIP HISTORY lists.
When the desired trip history (No. 1 to No. 5) is displayed, press the  key to enter this list.
Then press the  or Á key to scroll through the post trip annunciation data for the particularTRIP HISTORY list selected.
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Then press the red ACCEPT key to revert back and enable the user to select another TRIPHISTORY.
When all the desired TRIP HISTORY lists have been viewed, press the red ACCEPT key torevert back to the main menu.
4.10 Access SERIAL PORT options (Optional Password Protection)
From the main menu, select “Access SERIAL PORT options” using the ¿ or À key (Referto Section 4.3).
Then execute this function by pressing the  key (Refer to Section 4.4).
Then press the Á or  key to increment or decrement the baud rate of the SERIAL PORTas desired.
Then press the red ACCEPT key to confirm the selected setting.
The user will be presented with 3 choices:
• Resume
• Save
• Cancel
Press the Á or  key to select one of the above.
If Resume is selected, then pressing the red ACCEPT key will return the relay to the set-upmode, to allow the user to further modify the set-up parameters.
If Save is selected, then pressing the red ACCEPT key will save the new settings andchange the old settings to the new settings, and return to the main menu.
If Cancel is selected, then pressing the red ACCEPT key will abort and return to the mainmenu without saving the new settings or changing the old settings to the new settings (ie.the new settings will be discarded).
NOTE
It should be noted that while the RLC Relay is in the set-up mode, all the protectivefunctions are still active and thus full protection is still provided, using the
previously saved set-up parameters.
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4.11 Access PASSWORD SETUP menu
This function is used to change the password code from the initial default password code(000000) on delivery, to a new user selectable password code.
In addition this function is used to change the password code from when the user sowishes.
In order to change the password code to a new password code, the user will have to knowthe existing password code, except when changing from the default password code, inwhich case the user may proceed directly.
From the main menu, select “Access PASSWORD SETUP menu” using the ¿ or À key(Refer to Section 4.3)
Then execute this function by pressing the  key (Refer to Section 4.4)
The following screen will be displayed:
Old Password000000
Press the ¿ or À key to move the cursor, and press the Á or  key to increment ordecrement the selected digit.
In this way the Old Password code is entered. When the correct Password code isdisplayed, press the red ACCEPT key to confirm.
The following screen will be displayed:
New Password000000
In a similar manner to that detailed above, set a New Password code.
When the desired New Password code is displayed, press the red ACCEPT key to acceptthe New Password code.
If an incorrect password is entered, pressing the red ACCEPT key will revert back to themain menu. The user now has the option to repeat this function.
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The user will be presented with 3 choices:
• Resume
• Save
• Cancel
Press the Á or  key to select one of the above.
If Resume is selected, then pressing the red ACCEPT key will return the relay to the set-upmode, to allow the user to further modify the set-up parameters.
If Save is selected, then pressing the red ACCEPT key will save the new settings andchange the old settings to the new settings, and return to the main menu.
If Cancel is selected, then pressing the red ACCEPT key will abort and return to the mainmenu without saving the new settings or changing the old settings to the new settings (ie.the new settings will be discarded).
NOTE
It should be noted that while the RLC Relay is in the set-up mode, all the protectivefunctions are still active and thus full protection is still provided, using the
previously saved set-up parameters.
4.12 Access MODE SETUP selector
This function is used to select between Normal Mode and the “H” CONFIGURATION Mode.
In general this selection will only be made once, during installation, to suit the application.
On delivery the RLC Relay will be set to Normal Mode.
When the mode is changed, the default normal running display changes, the compensationvalues reset, new DSP code is installed, all DSP start up values are reset, and the triphistory list is cleared.
CAUTION
Never change the mode of the RLC Relay while the relay is in service protecting acapacitor bank or filter circuit.
RLC RELAY (Rev.01.26.09.97) Page 47 of 140
All protective functions would be compromised and operation of the RLC Relay would beundefined for that particular installation because the default settings of the new mode couldbe irrelevant. The associated circuit breaker could trip which could cause severe systemdisruption.
From the main menu, select “Access MODE SETUP selector” using the ¿ or À key (Referto Section 4.3)
Then execute this function by pressing the  key (Refer to Section 4.4).
Then press the Á or  key to select the desired mode.
Then press the red ACCEPT key to confirm the selected mode.
The user will be presented with 3 choices:
• Resume
• Save
• Cancel
Press the Á or  key to select one of the above.
If Resume is selected, then pressing the red ACCEPT key will return the relay to the set-upmode, to allow the user to further modify the set-up parameters.
If Save is selected, then pressing the red ACCEPT key will save the new settings andchange the old settings to the new settings, and return to the main menu.
If Cancel is selected, then pressing the red ACCEPT key will abort and return to the mainmenu without saving the new settings or changing the old settings to the new settings (ie.the new settings will be discarded).
NOTE
It should be noted that while the RLC Relay is in the set-up mode, all the protectivefunctions are still active and thus full protection is still provided, using the
previously saved set-up parameters.
RLC RELAY (Rev.01.26.09.97) Page 48 of 140
5 DISPLAY ANNUNCIATION AND SCREEN NAVIGATION
5.1 INTRODUCTION
This section provides details of the display indications and annunciation provided on theRLC Relay during normal and fault conditions. These include:
• The LCD screen display during normal operation• The LED indicators• The LCD screen display during overload or fault conditions• The LCD post trip fault annunciation and TRIP HISTORY screen displays
5.2 THE LCD SCREEN DISPLAYS DURING NORMAL OPERATION
After auxiliary power-up, and during normal operation, the LCD screen displays show theinstantaneous values of various measured and calculated parameters of the RLC Relay.
As delivered, the default LCD screen display during normal operation is the a, b & c phasepeak repetitive capacitor voltage, vc.
Cap Voltage vc82% 80% 83%
The other LCD screen displays during normal operation may be accessed by pressing theÁ, Â, ¿, À keys.
This will scroll through the various other normal operation screen displays enabling the userto view the instantaneous values of the various measured and calculated parameters of theRLC Relay.
If, after accessing any normal operation screen display, the Á, Â, ¿, À keys have not beenpressed for a period of about 1 minute, the back lightning will switch off. The existingdisplay becomes the “Power-up” default display.
The various normal operation screen displays depend on the mode configured for the RLCRelay (i.e. Normal Mode or “H” CONFIGURATION MODE) and are shown hereafter:
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5.2.1 Normal Mode
TYPICAL NORMAL OPERATION KEYPAD OPERATIONSCREEN DISPLAY
Phase a, b & c peak repetitive capacitor voltage, vc
Cap voltage vc82% 80% 83%
Press Á or  key
Phase a, b & c fundamental frequency line currents, I1
50Hz current I170% 71% 69%
Press Á or  key
Phase a, b & c thermal line currents, Ith
Thermal Ith65% 68% 64%
Press Á or  key
Phase a, b & c rms line currents, Irms
RMS current Irms72% 74% 71%
Press Á or  key
Star point unbalance current and phase angle, Iub
Star unbalance1% ∠ 60.0°
Press Á or  key
or, if compensated
Star unbalance∆ 1% ∠ 60.0°
Press Á or  key
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Earth fault current, Io
Earth fault Io0%
Press Á or  key
Line unbalance current, Ilub
Line unbalance1%
Press Á or  key
The phase peak maximum of the a, b & c repetitive capacitor overvoltage, vc, together withthe associated low-set threshold.
vc max 83%vc>vcr = 90%
Press ¿ or À key
The phase peak maximum of the a, b & c fundamental frequency line currents, I1, togetherwith the associated low-set threshold.
I1 max 71%I1>/In = 0.80
Press ¿ or À key
The phase peak maximum of the a, b & c thermal response line currents, Ith, together withthe associated low-set threshold.
Ith max 68%Ith>/In = 70%
Press ¿ or À key
The star point unbalance current, Iub together with the associated low-set threshold.
Iub 1%Iub>/In = 0.20
Press ¿ or À key
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The earth fault current, Io, together with the associated low-set threshold.
Io 0%Io>/In = 0.10
Press ¿ or À key
The line unbalance current, Ilub, together with the associated low-set threshold.
Ilub 1%Ilub>/In = 0.05
Press ¿ or À key
5.2.2 “H” CONFIGURATION MODE normal operation screen displays
Phase a, b & c unbalance currents, Iub.
aIub bIub cIub1% 2% 1%
Press Á or  key
a Phase unbalance current and phase angle, aIu.
Unbalance aIub1% ∠ 0.0°
Press Á or  key
b Phase unbalance current and phase angle, bIub.
Unbalance bIub2% ∠ 300.2°
Press Á or  key
c Phase unbalance current and phase angle, cIub.
Unbalance cIub1% ∠ 60.4°
Press Á or  key
RLC RELAY (Rev.01.26.09.97) Page 52 of 140
a Phase unbalance current, aIub, together with the associated low-set threshold.
aIub 1%aIub>/In = 0.20
Press ¿ or À key
b Phase unbalance current, bIub, together with the associated low-set threshold.
bIub 2%bIub>/In = 0.20
Press ¿ or À key
c Phase unbalance current, cIub, together with the associated low-set threshold.
cIub 1%cIub>/In = 0.20
Press ¿ or À key
5.3 THE LED INDICATORS
The following three LED indicators are provided on the front panel of the RLC Relay:
• Green LED: POWER ON/HEALTHY – This indicates that the auxiliary power supply isON, and the self-supervision output relay is energized, indicating that the protectionrelay is healthy.
• Yellow LED: ALARM – This indicates that one or more of the overcurrent startersoftware logic outputs of measuring elements 1,2 3 or 4 is “high”, and that the protectionrelay may trip if the fault condition persists.
• Red LED: TRIP – This indicates that a trip condition has occurred that has not yet beenacknowledged. Only when all the post trip fault annunciation screen displays have beenacknowledged will this LED go off. (Refer to Appendix 1 : Trip session)
5.4 THE LCD SCREEN DISPLAY DURING OVERLOAD OR FAULT CONDITION
During an overload or fault condition the normal operation screens simply display thevarious measured and/or calculated parameters prevailing.
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5.5 THE LCD POST-TRIP FAULT ANNUNCIATION and TRIP HISTORY SCREEN DISPLAYS
POST-TRIP FAULT ANNUNCIATION SCREEN DISPLAYS
The post-trip annunciation data for each trip event comprises up to 14 post-trip faultannunciation screens (for Normal Mode operation) or up to 6 post-trip fault annunciationscreens (for “H” CONFIGURATION MODE operation).
The set of post trip annunciation data for each trip event indicates which software tripsignals were output during the trip event. The magnitude of parameter causing thecorresponding software trip signal is recorded at the instant of output, as well as the timetaken from the moment the relevant trip threshold was exceeded, until the software signalwas output. In addition, in the case of the star-point or “H” CONFIGURATION MODE tripsignals, the relevant phase angle of the unbalance current is recorded, to indicate in whichleg of the capacitor bank, capacitor failure has occurred (Refer to Fig. 11 and 12).
After a trip event, the first-up of the post-trip fault annunciation screens of the event isdisplayed on the LCD screen.
Under normal circumstances, after a trip condition, an operator would investigate the tripcondition, inspect the relevant RLC Relay, note and record the post trip annunciation screendisplay, and then acknowledge (i.e. reset) the relay post trip fault annunciation, by pressingthe red ACCEPT key. At this point, the other trip conditions that may have occurred afterthe first-up trip condition, will be displayed. Again the user can acknowledge (i.e. reset) thisindication, by pressing the red ACCEPT key.
After all the post trip fault annunciation screens have been acknowledged, then the normaloperation screen is displayed again.
After investigating and rectifying the fault condition, the operator would normally only thenre-energize the tripped circuit breaker, after which the normal operation screen would bedisplayed.
If, however, the tripped circuit breaker is re-energized before the post trip fault annunciationscreens have been acknowledged, then the post trip annunciation screens will continue tobe displayed until they are acknowledged, as previously detailed, after which the normaloperation screen, will be displayed.
If a further fault condition were to occur, causing the circuit breaker to trip again, before theprevious post trip fault annunciation screens have been acknowledged, then the previousfault trip annunciation data is replaced with the latest fault trip annunciation data.
RLC RELAY (Rev.01.26.09.97) Page 54 of 140
NOTE
It is only possible to acknowledge a trip once the fault has been cleared, otherwiseyou will only be able to scroll through the post trip data.
TRIP HISTORY SCREEN DISPLAYS
When the fault has been cleared after a trip event, a set of post-trip annunciation data isrecorded in the TRIP HISTORY list.
The TRIP HISTORY list records the post-trip annunciation data for the last 5 trip events,with No. 1 being the most recent.
The complete TRIP HISTORY LIST comprising the post-trip annunciation data for the last 5trip events can be accessed by the user with the RLC Relay in normal operation (Refer toSection 5.10).
TYPICAL POST-TRIP FAULT ANNUNCIATION AND TRIP HISTORY DISPLAYSFOR NORMAL MODE
vc>trip 105% 1312s
Iub>trip 20%∠60.2° 10s
vc>>trip 542% 0.05s
Iub>>trip 40%∠60.2° 1s
I1>trip 110% 600s
Io>trip 11% 1s
I1>>trip 422% 0.05s
Io>>trip 82% 0.02s
RLC RELAY (Rev.01.26.09.97) Page 55 of 140
Ith>trip 125% 1810s
Ilub>>trip 5% 0.02s
Bfail 10% 0.10s
Ilub>>trip 8% 10s
TYPICAL POST-TRIP FAULT ANNUNCIATION AND TRIP HISTORY DISPLAYSFOR “H” CONFIGURATION MODE
aIub> 25%∠60.1° 10s
aIub>> 25%∠60.4° 1s
bIub> 24%∠120.0° 10s
bIub>> 40%∠121.0° 1s
cIub> 27%∠240.0° 10s
RLC RELAY (Rev.01.26.09.97) Page 56 of 140
6 INSTALLATION
6.1 INTRODUCTION
This section provides details regarding unpacking, storage, handling, mounting, wiring andnoise isolation of RLC Relays.
6.2 UNPACKING, STORAGE AND HANDLING
Upon receipt, the RLC Relay should be examined to ensure no obvious damage occurredduring transit. Care must be taken when unpacking so that none of the parts are damaged.Check that the RLC Relay delivered corresponds with that ordered, particularly in respect ofthe rated auxiliary voltage.
If the RLC Relay is not to be installed immediately upon receipt, it should be stored in alocation free of dust and moisture in their original cartons. The allowable storagetemperature range is -20°C to +70°C.
The relays use components that are sensitive to electrostatic discharges. However, theelectronic circuits are well protected by the fixed metal case of the RLC Relay. Thereforedo not withdraw the draw-out chassis unnecessarily.
However, when handling the draw-out module outside the fixed metal case, care should betaken to avoid contact with the electronic components and electrical connections. Ifremoved from the case for storage and/or transport, the draw-out module should be placedin an anti-static bag.
If it becomes necessary to withdraw the draw-out module, the following precautions shouldbe taken:
• Before removing the draw-out module, ensure that you are at the same electrostaticpotential as the equipment, by touching the fixed metal case.
• Handle the draw-out module by the metal fascia plate, frame or edges of the printedcircuit boards. Avoid touching the electronic components, printed circuit board tracks orconnectors.
• If the equipment is to be passed to another person, first ensure you are both at thesame electrostatic potential, such as, by shaking hands.
• Place the draw-out module on an anti-static surface, or on a conducting surface, whichis at the same potential as you.
• Store or transport the draw-out module in an anti-static bag.
Further information on safe working procedures for electronic equipment can be found inthe relevant national and international standards.
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6.3 MOUNTING
The RLC Relay can be mounted anywhere that meets the environmental specifications asdetailed in Appendix 2, and in particular it should be mounted indoors, in a clean, dryatmosphere, out of direct sunlight, and free from excessive dust and vibration.
Refer to Fig.3 for details of outline dimensions, cutout details and mounting holes.
CAUTION
Heat producing devices must be located at sufficient distances to ensure that themaximum operating temperature of the RLC Relay is not exceeded.
The RLC Relay is normally used as a flush mounted or 19 inch rack mountedinstrument, for fitting on or within switchgear or relay panels. The relay should bemounted at a convenient height above floor level to facilitate optimum visibility and
operator interaction.
CAUTION
The mounting holes of the fixed metal casing of RLC Relay are accessible withoutremoving the front cover and/or the draw-out module. Therefore it is strongly
recommended that the draw-out module should remain protected by the fixed metalcase during mounting and assembly of a RLC Relay into a panel or 19 inch rack
(Refer to Section 6.2).
6.4 WIRING
All current transformer, auxiliary voltage, output relay and input signal wiring connects to aterminal block with 28 recessed terminals on the rear of the fixed casing. Standard screwterminals or fast-on connectors can be used on the terminal block for the externalconnections to the protection relay.
Refer to Fig. 4 for a terminal and connection diagram showing terminal numbers.
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6.4.1 Auxiliary Power Supply
Connect the auxiliary power supply to terminals 5 and 7.
NOTE
The auxiliary power supply is not polarity sensitive and can accept ac or dc inputvoltages.
CAUTION
Check carefully, before energizing, that the auxiliary voltage is correct, and fallswithin the range indicated on the RLC Relay.
Refer to Fig. 9 to Fig. 16 for typical application drawings.
Refer also to the connection diagram of Fig. 4.
WARNING
Ensure that the auxiliary supply to the RLC Relay is adequately protected by meansof fuses or miniature circuit breakers to suit the fault level and wire size used. High
rupturing capacity fuses (2A) are recommended.
6.4.2 Current Transformer Circuits
Connect the current transformer connections for elements 1, 2, 3 and 4 to terminals 21 and22, 23 and 24, 25 and 26 and 27 and 28, respectively.
Refer to Fig. 9 to Fig. 16 for typical application drawings.
Refer also to the connection diagram of Fig. 4.
CAUTION
One side of each CT circuit should be earthed, and multiple earth connections andearth loops should be avoided.
RLC RELAY (Rev.01.26.09.97) Page 59 of 140
CAUTION
Check carefully, before applying current transformer inputs, that the currenttransformer rated currents are correct and correspond with the nominal rated
currents of the relevant measuring elements. Refer to Section 3.5 for details on howto configure the nominal rated current of an element for 1A or 5A.
Refer to Appendix 3 for the acceptable current range, the short-time overcurrent, and theVA burden of the measuring elements.
WARNING
Extremely hazardous voltages can appear across the CT secondaries if the CTsecondary current is open circuited. Do not attempt to connect, disconnect, service
or insert other devices in the CT secondary current loops without positivelyswitching off the primary circuit, and thus ensuring that the secondary current is
zero.
The draw-out module of a RLC Relay may be safely withdrawn on-load, becausewithdrawing the draw-out module automatically short circuits the current transformerterminals, and prevents the possibility of CT open circuits during the process.
6.4.3 Output Relay Circuits
Connect the applicable output relay circuits to the terminals of output relays #1, #2, #3, #4,#5, and #6.
Refer to Fig. 9 to Fig. 16 for typical application drawings.
Refer also to the connection diagrams of Fig. 4.
CAUTION
Check carefully before applying voltage to the output relay contacts that the loadsand voltages to be applied are within the ratings of the relay contacts. Refer toAppendix 3 for the continuous thermal rating, the short time current rating, the
making capacity, the breaking capacity, the maximum switching voltage and themaximum switching current of the output relays.
RLC RELAY (Rev.01.26.09.97) Page 60 of 140
WARNING
Ensure that the voltages applied to the output relay contacts are adequatelyprotected by means of fuses or miniature circuit breakers to suit the fault-level, wire
size and contact rating.
6.4.4 Digital Input
If applicable, connect the digital input circuits to terminal numbers 9 and 11.
Refer to Fig. 9 to Fig. 16 for typical application drawings.
Refer to the connection diagrams of Fig. 4.
The digital input terminals can accept ac or dc input voltages and are not polarity sensitive.
CAUTION
Check carefully before applying voltage to the blocking input terminals that thevoltage applied is correct and falls within the range detailed in Appendix 3.
WARNING
Ensure that the voltage applied to the blocking input is adequately protected bymeans of fuses or miniature circuit breakers to suit the fault level and wire size used.
High rupturing capacity fuses (2A) are recommended.
6.4.5 Earth Connection
It is recommended that a 4mm² earth conductor be installed from the RLC Relay earthterminal to the panel earth bar. In addition, ensure that the panel is properly earthed inaccordance with local regulations.
CAUTION
In order for the RLC Relay not to be adversely affected by surges, transients andother electrical and electro-magnetic noise, it is essential that the relay is properly
earthed as detailed above.
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WARNING
For personnel safety it is essential that the RLC Relay is properly earthed as detailedabove.
6.5 NOISE ISOLATION
Refer to Section 6.4.5.
When properly connected and earthed, RLC Relays are highly tolerant of electrical andelectro-magnetic noise. Refer to Appendix 2 for the withstand ability. However, as withother micro-processor based measurement and protection equipment, the RLC Relay mustbe installed, wired and located with some degree of concern for electrical and electro-magnetic noise which could cause erratic operation. The relay should be wired,mounted and isolated from sources of potential noise and disturbances in excess of thoseprescribed in Appendix 2. In extreme cases this may require that filters or surgesuppressors be applied to electro-magnetic devices operating in close proximity to the RLCRelay.
To avoid possible problems from electrical and electro-magnetic noise and disturbances, orif specific problems are experienced in this regard, obtain specialist advice regardingcounter measures and solutions.
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7 STEP-BY-STEP INSTRUCTIONS FOR INSTALLING, CONFIGURING, TESTING ANDPUTTING INTO SERVICE
7.1 INTRODUCTION
This section provides step-by-step instructions for installing, configuration, testing andputting into service the RLC Relay. Please refer to the relevant sections of this manual forfurther details.
7.2 STEP-BY-STEP INSTRUCTIONS
1. Unpack the relay, and check for obvious damage.Check that the type supplied corresponds with that ordered, especially in respect ofauxiliary voltage.
2. If the nominal rated current of any measuring element is to be changed from thedefault value of 5A to 1A to suit the application, remove the front cover of the relay,withdraw the draw-out module and reconfigure the appropriate elements.
Ensure that the rating plate details of the RLC Relay reflect the nominal ratedcurrents of each element.
3. If the contact form (normally open or normally closed) of any of output relays #1, #2,#3, #4, #5 or #6 is to be changed from the default settings of normally open tonormally closed, withdraw the draw-out module and reconfigure the appropriatecontacts.
4. Insert the draw-out module back into the fixed casing and affix the front cover of therelay.
5. Mount the RLC Relay within a cut-out on the switchgear or relay panel, or within anappropriate 19 inch rack.
Ensure that the fixed housing is securely screwed to the panel or 19 inch rack, usingthe mounting holes on the fixed housing. These are accessible from the frontwithout removing the front cover of the relay.
6. Wire the auxiliary power supply to the relay, (Do not apply voltage yet).
7. Wire the current transformer circuits to the relay. (Do not apply current to the inputsyet.)
8. Wire the appropriate output relay circuits to suit the application. (Do not applyvoltage yet.)
9. If applicable, wire the digital input circuits. (Do not apply voltage yet.)
RLC RELAY (Rev.01.26.09.97) Page 63 of 140
10. Measure the auxiliary power supply voltage, the voltages for the output relays andthe voltage for the digital input. Confirm that these voltages are correct and withinthe acceptable range in accordance with the RLC Relay specifications. Only thenapply these voltages to the RLC Relay.
Measure the voltages at the terminals of the RLC Relay to confirm that the voltagesat the relay terminals are correct.
Check that with auxiliary power applied, the self-supervision relay #6 is energizedand that its contacts are in the correct state.
11. Check that the LCD screen of the RLC Relay is displaying the normal operationscreen display, that the green POWER ON / HEALTHY LED is ON, and that the redALARM and TRIP LED’s are off.
12. Access the main menu.
13. If the RLC Relay is to be used in the “H” CONFIGURATION MODE access theMODE SELECTION function and select this mode (the default mode on delivery isthe ‘NORMAL MODE”).
14. If the RLC Relay is to be configured for ‘NORMAL” mode:
• Configure the parameter settings for elements 1,2 and 3 to suit the application.
• Configure the parameter settings for element 4, to suit the application.
• Configure the parameter settings for element 5 to suit the application.
• Configure the OTHER settings to suit the application.
ALTERNATIVELY
If the RLC Relay is to be configured for the “H” CONFIGURATION MODE.
• Configure the parameter settings for elements 2, 3 and 4 to suit the application.
15. Save the parameter settings configured.
16. From the main menu, access the OUTPUT RELAY SETUP function.
17. Configure the functionality of output relays #1, #2, #3, #4, and #5 to suit theapplication.
18. Check that the output relay check-sums are correct for the desired output relayconfiguration.
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19. Save the output relay functionality configured.
20. From the main menu, access the DIAGNOSTIC TEST sequence, and execute thediagnostic test. Confirm that all diagnostic tests produce satisfactory results.
21. From the main menu, access the SERIAL PORT options, and select the appropriatebaud rate for the serial port.
22. Save the baud rate setting.
23. Revert back to the normal running screen displays.
24. Perform primary or secondary injection tests, to inject current into the secondarycircuits and the RLC Relay current input terminals. Confirm that the normal runningparameters displayed are correct, and that the protective functions are operational.Perform any other relevant commissioning checks and tests.
25. Once any other commissioning tests associated with the complete installation arecompleted, and the associated circuit breaker is energized, check that theparameters displayed on the normal running screen are sensible and correct.
26. Compensate the unbalance currents.
27. Document all the commissioning tests and the RLC Relay settings carefully by fillingin the Commissioning Test Record of Appendix 5.
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28. Whilst a RLC Relay is in service, the following functions may be performed on line:
• The normal operation screen displays may be accessed.
• The main menu may be accessed.
• The parameter set up menu may be accessed and any setting variables viewedor modified.
• The unbalance currents may be uncompensated or
• re-compensated.
• The output relay menu may be accessed and the configuration of any outputrelay may be viewed or modified.
• The diagnostic test sequence may be run.
• The trip history list may be browsed.
• The password set-up menu may be accessed in order to modify the passwordcode.
CAUTION
Performing any changes to element variable or other settings, changes tooutput relay configurations, or running the diagnostic test sequence to test
the output relays, may cause the associated circuit breaker to trip. This couldcause serious system disruption. Therefore the greatest care should be
exercised when performing these functions on-line, and the user should havea thorough knowledge of this entire manual as well as the particular
application and system.
Never change the mode of the RLC Relay while the relay is in serviceprotecting a capacitor bank or filter circuit.
All protective functions would be compromised and operation of theRLC Relay would be undefined for that particular installation because
the default settings of the new mode could be irrelevant. Theassociated circuit breaker could trip which could cause severe system
disruption.
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8 TROUBLE SHOOTING
Before attempting to trouble-shoot the equipment, the user should thoroughly understandthis entire manual, and should have a prior knowledge of power system protection, powersystem measurements, and power system safety procedures. The user should studycarefully the applicable sections of this manual, taking particular note of WARNINGS,CAUTIONS and NOTES included for personnel and equipment protection.
For trouble-shooting and commissioning, the following equipment is required:
• Digital multimeter with clip-on current tong for measuring 1A or 5A current transformersecondaries.
• A single phase primary or secondary injection test set to enable injection of the CTnominal rated secondary currents into the RLC Relay measuring elements.
Due to the nature of the RLC Relay, it is not recommended that the user should attemptrepairs other than the removal and replacement of the draw-out unit which houses allelectrical and electronic parts.
If erroneous, inconsistent or nonsensical data is displayed on the RLC Relay, or if erraticfaulty operation is experienced by the user, check the various points listed on the FaultReport Check List of Appendix 6.
If the user has performed all the above checks, and is satisfied that no external or setting-upproblems exist which are causing the problems experienced, then return the RLC Relay toSTRIKE Technologies (Pty) Ltd together with the Fault Report of Appendix 6, documentingthe results of the Fault Report Check List, the details of the problem experienced, the RLCRelay front plate details, configuration set-up details, installation details, etc.
The user may elect to withdraw the draw-out unit from the fixed case and send this toSTRIKE Technologies (Pty) Ltd for checking, repair, testing and calibration. In this caseattention should be paid to the handling requirements, as detailed in Section 6.2.
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FIGURE 1: FRONT VIEW AND IDENTIFICATION OF EXTERNAL COMPONENTS
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FIGURE 2: REAR VIEW AND IDENTIFICATION OF EXTERNAL COMPONENTS
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FIGURE 3: DIMENSIOINS AND CUTOUT DETAILS
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FIGURE 4: TERMINAL AND CONNECTION DIAGRAM
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FIGURE 5: ELEMENT RATED CURRENT CONFIGURATION DIAGRAM
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FIGURE 6: OUTPUT RELAY CONTACT FORM CONFIGURATION DIAGRAM
RLC
RE
LAY
(Rev.01.26.09.97)
Page 73 of 140
FIGU
RE
7: PE
AK
RE
PE
TITIVE
OV
ER
VO
LTAG
E vs TIM
E TR
IP C
UR
VE
S
10-1 100 101 102 103
1
1.5
2
2.5
3
Vc>/ vcr : =1.1
Vc>/ vcr : =0.8
Vc>v cr : =0.9Vc>/ vcr : =1.0Vc>/ vcr : =1.25
Vc>/ vcr : =1.5
Time (s)
ANSI C URVE POIN TS
10-1
100
101
102
103
1
1.5
2
2.5
3
VC>/V CR =1.1
VC>/V CR =0.8
VC>/V CR =0.9
VC>/V CR =1.0
VC>/V CR =1.25
VC>/V CR =1.5
vc
/vc
r (p
u)
Tim e (s)
.
RLC RELAY (Rev.01.26.09.97) Page 74 of 140
FIGURE 8: THERMAL OVERLOAD VS TRIP TIME CURVE FOR VARIOUS PRIOR THERMALLOADING CONDITIONS
0
0.5
1
1.5
2
2.5
3
1 1.5 2 2.5 3 3.5
Overload current : I / Ith> (pu)
Tri
p ti
mes
for
τ =
1
(sec
onds
)
0,0 . Ith>
0,70 . Ith>0,80 . Ith>0,85 . Ith>0,90 . Ith>0,95 . Ith>
Prior ThermalLoading:
RLC RELAY (Rev.01.26.09.97) Page 75 of 140
FIGURE 9: APPLICATION EXAMPLE 1 - PROTECTION OF A SINGLE STAR OR DELTACONNECTED CAPACITOR BANK, WITH SERIES DAMPING OR FILTER REACTORS
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FIGURE 10: APPLICATION EXAMPLE 2 - PROTECTION OF A DOUBLE STAR CONNECTEDCAPACITOR BANK, WITH SERIES DAMPING OR FILTER REACTORS
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FIGURE 11: APPLICATION EXAMPLE 3: PROTECTION OF AN “H” CONFIGURATIONSINGLE STAR CONNECTED CAPACITOR BANK, WITH SERIES DAMPING OR FILTERREACTORS
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FIGURE 12: APPLICATION EXAMPLE 4 - PROTECTION OF A HIGH PASS FILTER CIRCUITWITH A DOUBLE STAR CONNECTED CAPACITOR BANK
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FIGURE 13: APPLICATION EXAMPLE 5 - PROTECTION OF A “C” TYPE HARMONIC FILTERCIRCUIT WITH A DOUBLE STAR CONNECTED MAIN CAPACITOR BANK, AFUNDAMENTAL FREQUENCY TUNING SUBSIDIARY CAPACITOR BANK, FILTERREACTORS AND FILTER RESISTORS
RLC RELAY (Rev.01.26.09.97) Page 80 of 140
FIGURE 14: APPLICATION EXAMPLE 6 - PROTECTION OF A “C” TYPE HARMONIC FILTERCIRCUIT WITH AN “H” CONFIGURATION MAIN CAPACITOR BANK, A FUNDAMENTALFREQUENCY TUNING SUBSIDIARY CAPACITOR BANK, AND STAR CONNECTED FILTERREACTORS AND RESISTORS
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FIGURE 15: TYPICAL CONNECTION DIAGRAM FOR THE PROTECTION OF A SERIESTUNED HARMONIC FILTER CIRCUIT WITH A DOUBLE STAR
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FIGURE 16: TYPICAL CONNECTION DIAGRAM FOR THE PROTECTION OF AN “H”CONFIGURATION MODE CAPACITOR BANK WITH DAMPING REACTORS
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FIGURE 17: ELEMENT FAILURE ON INTERNALLY OR EXTERNALLY FUSED CAPACITORUNITS (DOUBLE STAR)
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FIGURE 18: ELEMENT FAILURE ON UNFUSED CAPACITOR UNITS (DOUBLE STAR)
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FIGURE 19: ELEMENT FAILURE ON INTERNALLY OR EXTERNALLY FUSED CAPACITORUNITS (“H” CONFIGURATION)
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FIGURE 20: ELEMENT FAILURE ON UNFUSED CAPACITOR UNITS (“H” CONFIGURATION)
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FIGURE 21: LOGIC DIAGRAM FOR ELEMENTS 1, 2 AND 3 (NORMAL MODE)
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FIGURE 22: LOGIC DIAGRAM FOR ELEMENT 4 (NORMAL MODE)
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FIGURE 23: LOGIC DIAGRAM FOR ELEMENT 5 (NORMAL MODE)
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FIGURE 24: LOGIC DIAGRAM FOR ELEMENTS 2, 3 AND 4 (“H” CONFIGURATION MODE)
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FIGURE 25: EFFECT OF PEAK REPETITIVE OVER VOLTAGE RESET TIMER, vc>reset:xt,DURING INTERMITTANT PEAK REPETITIVE OVER VOLTAGES
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FIGURE 26: CONFIGURATION OF OUTPUT RELAYS #1 TO #5 (NORMAL MODE)
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FIGURE 27: CONFIGURATION OF OUTPUT RELAYS #1 TO #5 (“H” CONFIGURATIONMODE)
RLC RELAY (Rev.01.26.09.97) Page 94 of 140
APPENDIX 1: NOMENCLATURE AND DEFINITIONS
SYMBOL DEFINITION
1: Element 1
2: Element 2
3: Element 3
4: Element 4
5: Element 5
Icr The capacitor rated current.
In The current transformer nominal primary current.
Icr/In The capacitor rated current per unit of current transformer nominal primarycurrent.
vc The calculated capacitor peak repetitive voltage.
vcr The capacitor rated peak repetitive voltage.
vc/vcr The calculated capacitor peak repetitive voltage per unit of capacitor rated peakrepetitive voltage.
vc> The capacitor continuous peak repetitive withstand ability threshold.
vc>/vcr The capacitor continuous peak repetitive withstand ability threshold per unit ofcapacitor rated peak repetitive voltage.
vc>reset Reset timer for overvoltage vc>/vcr timer
vc>> The capacitor peak repetitive highset overvoltage threshold.
vc>>/vcr The capacitor peak repetitive highset overvoltage threshold per unit of capacitorrated peak repetitive voltage.
vc>>:xt The time multiplier for the definite timer associated with the capacitor highsetovervoltage threshold.
vc>start A software output signal indicating that the calculated capacitor peak repetitivevoltage has exceeded the capacitor continuous peak repetitive voltage withstandability threshold, and that the associated inverse timer is timing out.
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vc>trip A software output signal indicating that the inverse timer associated with thecapacitor continuous peak repetitive voltage withstand ability threshold has timedout.
vc>>trip A software output signal indicating that the definite timer associated with thecapacitor peak repetitive highset overvoltage threshold has timed out.
Irms The calculated rms heating current.
Irms/In The rms heating current per unit of current transformer nominal primary current.
τ The heating / cooling time constant for the calculation of the thermal response tothe rms heating current.
Ith The calculated thermal current response to the rms heating current.
Ith/In The thermal response to the rms heating current per unit of current transformernominal primary current.
Ith> The thermal response overcurrent threshold.
Ith>/In The thermal response overcurrent threshold per unit of current transformernominal primary current.
Ith>start A software output signal indicating that the calculated rms heating current hasexceeded the thermal response overcurrent threshold, and that in due course thecalculated thermal response will exceed the thermal response overcurrentthreshold.
Ith>trip A software output signal indicating that the calculated thermal response hasexceeded the thermal response overcurrent threshold.
I1 The calculated fundamental frequency rms current.
I1/In The calculated fundamental frequency rms current per unit of current transformernominal primary current.
I1> The low set fundamental frequency overcurrent threshold.
I1>/In The low set fundamental frequency overcurrent threshold per unit of currenttransformer nominal primary current.
I1>:xt The time multiplier for the definite timer associated with the low set fundamentalfrequency overcurrent threshold.
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I1>> The high set fundamental frequency overcurrent threshold.
I1>>/In The high set fundamental frequency overcurrent threshold per unit of currenttransformer nominal primary current.
I1>>:xt The time multiplier for the definite timer associated with the high set fundamentalfrequency overcurrent threshold.
I1>start A software output signal indicating that the calculated fundamental frequency rmscurrent has exceeded the low set fundamental frequency overcurrent threshold,and that the associated definite timer is timing out.
I1>trip A software output signal indicating that the timer associated with the low setfundamental frequency overcurrent threshold has timed out.
I1>> trip A software output signal indicating that the definite timer associated with the highset fundamental frequency overcurrent threshold has timed out.
Iub The calculated uncompensated fundamental frequency rms star point unbalancecurrent.
Iub/In The calculated uncompensated fundamental frequency rms star point unbalancecurrent per unit of current transformer nominal primary current.
Iub> The low set fundamental frequency star point unbalance overcurrent threshold.
Iub>/In The low set fundamental frequency star point unbalance overcurrent thresholdper unit of current transformer nominal primary current.
Iub>:xt The time multiplier for the definite timer associated with the low set fundamentalfrequency star point unbalance overcurrent threshold.
Iub>> The high set fundamental frequency star point unbalance overcurrent threshold.
Iub>>/In The high set fundamental frequency star point unbalance overcurrent thresholdper unit of current transformer nominal primary current.
Iub>>:xt The time multiplier for the definite timer associated with the high set fundamentalfrequency star point unbalance overcurrent threshold.
Iub>start A software output signal indicating that the calculated fundamental frequency rmsstar point unbalance current has exceeded the low set fundamental frequencystar point unbalance overcurrent threshold, and that the associated definite timeris timing out.
RLC RELAY (Rev.01.26.09.97) Page 97 of 140
Iub>trip A software output signal indicating that the definite timer associated with the lowset fundamental frequency star point unbalance overcurrent threshold has timedout.
Iub>>trip A software output signal indicating that the definite timer associated with the highset fundamental frequency star point unbalance overcurrent threshold has timedout.
∆Iub The calculated compensated fundamental frequency rms star point unbalancecurrent, i.e. the change in fundamental frequency rms current from the initialuncompensated fundamental frequency rms current at the instant ofcompensation.
∆Iub/In The calculated compensated fundamental frequency rms star point unbalancecurrent per unit of current transformer nominal primary current.
Ilub The calculated fundamental frequency line unbalance current.
Ilub/In The calculated fundamental frequency line unbalance current per unit of currenttransformer nominal primary current.
Ilub> The low set fundamental frequency line unbalance current threshold.
Ilub>/In The low set fundamental frequency line unbalance current threshold per unit ofcurrent transformer nominal primary current.
Ilub>:xt The time multiplier for the definite timer associated with the low set fundamentalfrequency line unbalance current threshold.
Ilub>> The high set fundamental frequency line unbalance current threshold.
Ilub>>/In The high set fundamental frequency line unbalance current threshold per unit ofcurrent transformer nominal primary current.
Ilub>>:xt The time multiplier for the definite timer associated with the high set fundamentalfrequency line unbalance current threshold.
Ilub>start A software output signal indicating that the calculated fundamental frequency lineunbalance current has exceeded the low set fundamental frequency lineunbalance overcurrent threshold, and that the associated definite timer is timingout.
Ilub>trip A software output signal indicating that the definite timer associated with the lowset fundamental frequency line unbalance overcurrent threshold has timed out.
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Ilub>>trip A software output signal indicating that the definite timer associated with the highset fundamental frequency line unbalance overcurrent threshold has timed out.
Io The calculated fundamental frequency earth fault current.
Io/In The calculated fundamental frequency earth fault current per unit of currenttransformer nominal primary current.
Io> The low set fundamental frequency earth fault current threshold.
Io>/In The low set fundamental frequency earth fault current threshold per unit ofcurrent transformer nominal primary current.
Io>:xt The time multiplier for the definite timer associated with the low set fundamentalfrequency earth fault current threshold.
Io>> The high set fundamental frequency earth fault current threshold.
Io>>/In The high set fundamental frequency earth fault current threshold per unit ofcurrent transformer nominal primary current.
Io>>:xt The time multiplier for the definite timer associated with the high set fundamentalfrequency earth fault current threshold.
Io>start A software output signal indicating that the calculated fundamental frequencyearth fault current has exceeded the low set fundamental frequency earth faultovercurrent threshold, and that the associated definite timer is timing out.
Io>trip A software output signal indicating that the definite timer associated with the lowset fundamental frequency earth fault overcurrent threshold has timed out.
Io>>trip A software output signal indicating that the definite timer associated with the highset fundamental frequency earth fault overcurrent threshold has timed out.
I1< The fundamental frequency undercurrent threshold.
I1</In The fundamental frequency undercurrent threshold per unit of currenttransformer nominal primary current.
I1<:xt The time multiplier for the definite timer associated with the fundamentalfrequency undercurrent threshold.
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I1<trip A software output signal indicating that while the circuit breaker feeding thecapacitor bank / harmonic filter circuit was on, the fundamental frequency currentdripped below the undercurrent threshold for a definite time, indicating a loss ofsupply voltage.
Bon An input signal indicating that the circuit breaker controlling the capacitor bank /harmonic filter circuit is on.
Bfail1 A software output signal indicating that when a trip occurred, the fundamentalfrequency current remained above the undercurrent threshold for a definite time,indicating the failure of the circuit breaker to interrupt the capacitor bank /harmonic filter circuit current.
Bfail2 A software output signal indicating that while the circuit breaker feeding thecapacitor bank / harmonic filter circuit was off, the fundamental frequency currentremained above the undercurrent threshold for a definite time, indicating thefailure of the circuit breaker to interrupt the capacitor bank / harmonic filter circuitcurrent.
Bena A software output signal that can be used to inhibit the switching on of the circuitbreaker controlling the capacitor bank / harmonic filter circuit for a definite timeafter the circuit breaker switches off, to allow the capacitor bank to dischargebefore re-energization. This signal is normally at logic 1 (high), goes to logic 0(low) when the circuit breaker switches off, and reverts to logic 1 (high) a definitetime (typically set as 5 minutes) thereafter.
Bena:xt The time multiplier for the definite timer associated with Bena logic. This timer isalso referred to as the capacitor bank discharge timer.
aIub The calculated a phase uncompensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current.
aIub/In The calculated a phase uncompensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current per unit of current transformernominal primary current.
aIub> The a phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold.
aIub>/In The a phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold per unit of current transformer nominal primarycurrent.
aIub>:xt The a phase time multiplier for the definite timer associated with the a phase lowset fundamental frequency “H” CONFIGURATION MODE unbalance overcurrentthreshold.
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aIub>> The a phase high set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold.
aIub>>/In The a phase high set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold per unit of current transformer nominal primarycurrent.
aIub>>:xt The a phase time multiplier for the definite timer associated with the a phase highset fundamental frequency “H” CONFIGURATION MODE unbalance overcurrentthreshold.
aIub>start A software output signal indicating that the calculated a phase fundamentalfrequency rms “H” CONFIGURATION MODE unbalance current has exceededthe a phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold, and that the definite timer associated with the aphase is timing out.
aIub>trip A software output signal indicating that the a phase definite timer associated withthe a phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold has timed out.
aIub>>trip A software output signal indicating that the a phase definite timer associated withthe a phase high set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold has timed out.
∆aIub The calculated a phase compensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current, i.e. the change in a phasefundamental frequency rms current from the initial a phase uncompensatedfundamental frequency rms current at the instant of compensation.
∆aIub/In The calculated a phase compensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current per unit of current transformernominal primary current.
bIub The calculated b phase uncompensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current.
bIub/In The calculated b phase uncompensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current per unit of current transformernominal primary current.
bIub> The b phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold.
bIub>/In The b phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold per unit of current transformer nominal primarycurrent.
RLC RELAY (Rev.01.26.09.97) Page 101 of 140
bIub>:xt The b phase time multiplier for the definite timer associated with the b phase lowset fundamental frequency “H” CONFIGURATION MODE unbalance overcurrentthreshold.
bIub>> The b phase high set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold.
bIub>>/In The b phase high set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold per unit of current transformer nominal primarycurrent.
bIub>>:xt The b phase time multiplier for the definite timer associated with the b phase highset fundamental frequency “H” CONFIGURATION MODE unbalance overcurrentthreshold.
bIub>start A software output signal indicating that the calculated b phase fundamentalfrequency rms “H” CONFIGURATION MODE unbalance current has exceededthe b phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold, and that the associated b phase definite timeris timing out.
bIub>trip A software output signal indicating that the b phase definite timer associated withthe b phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold has timed out.
bIub>>trip A software output signal indicating that the b phase definite timer associated withthe b phase high set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold has timed out.
∆bIub The calculated b phase compensated fundamental frequency rms ”H”CONFIGURATION MODE unbalance current, i.e. the change in b phasefundamental frequency rms current from the initial b phase uncompensatedfundamental frequency rms current at the instant of compensation.
∆bIub/In The calculated b phase compensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current per unit of current transformernominal primary current.
cIub The calculated c phase uncompensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current.
cIub/In The calculated c phase uncompensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current per unit of current transformernominal primary current.
cIub> The c phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold.
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cIub>/In The c phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold per unit of current transformer nominal primarycurrent.
cIub>:xt The c phase time multiplier for the definite timer associated with the c phase lowset fundamental frequency “H” CONFIGURATION MODE unbalance overcurrentthreshold.
cIub>> The c phase high set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold.
cIub>>/In The c phase high set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold per unit of current transformer nominal primarycurrent.
cIub>>:xt The c phase time multiplier for the definite timer associated with the c phase highset fundamental frequency “H” CONFIGURATION MODE unbalance overcurrentthreshold.
cIub>start A software output signal indicating that the calculated c phase fundamentalfrequency rms “H” CONFIGURATION MODE unbalance current has exceededthe c phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold, and that the associated b phase definite timeris timing out.
cIub>trip A software output signal indicating that the c phase definite timer associated withthe c phase low set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold has timed out.
cIub>>trip A software output signal indicating that the c phase definite timer associated withthe c phase high set fundamental frequency “H” CONFIGURATION MODEunbalance overcurrent threshold has timed out.
∆cIub The calculated c phase compensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current, i.e. the change in c phasefundamental frequency rms current from the initial c phase uncompensatedfundamental frequency rms current at the instant of compensation.
∆cIub/In The calculated c phase compensated fundamental frequency rms “H”CONFIGURATION MODE unbalance current per unit of current transformernominal primary current.
Trip session A trip session starts from the first active trip condition until the last trip conditionhas been cleared. The visible observation of this session is defined by the timewhen the trip LED lights up to the time when the alarm LED goes off. During thistime the red ACCEPT key may be used to scroll through the different trips, butwill not acknowledge any trip events that may have occured.
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APPENDIX 2: GENERAL CHARACTERISTICS
Applicable standard IEC 255Operating temperature -10 to +55°C to IEC 68-2-2Storage temperature range -20 to +70°C to IEC 68-2-2Humidity 4 days, 95% RH, with temperature cycled between +25°C and + 45°C, to IEC 68-2-3Enclosure degree ofprotection
IP50 (dust protected) to IEC 529
Shock and bump Shock: 15G, 3 pulses per direction, per axis. (total 18 times).Bump : 10G, 1000 pulses per direction, per axis (total 6000 times).To IEC 255-21-2
Vibration 9,8ms-ð (1G) constant frequency from 10 to 500 Hz per axis.To IEC 255-21-1
Power frequency voltagewithstand
2kV rms 50Hz for 1 minute, from all terminals to case (earth), and between terminalsof independent circuits.1,5 kV rms across open contacts of output relays.To IEC 255-5
Impulse voltage withstand 5kV peak, 1,2/50µs waveshape, 0,5J energy content, 10 shots in each polarity,between all terminals and case (earth), and between terminals of independentcircuits.To IEC 255-5
Insulation resistance 50MΩ minimum at 500V dc, to IEC 255-5Immunity to high frequencydisturbances(1MHz burst disturbancetest)
2,5kV peak between independent circuits, and to case (earth).1kV peak across terminals of the same circuit.To IEC 255-22-1
Immunity to electrostaticdischarges(Electrostatic discharge test)
8kV discharge in air with cover in place.4kV point contact discharge with cover removed.To IEC 255-22-2
Immunity to fast transientbursts(Fast transient burst test)
Class 3 (2kV).To IEC 255-22-4
Immunity to high frequencyelectromagnetic fields
10V/m from 27 to 500Mhz, to IEC 255-22-3
Conducted disturbancesinduced by radio-frequencyfields immunity test
To ENV 50141
Immunity to high frequencyelectromagnetic field (Pulsemodulated, simulation of theeffect of cell phones)
To ENV 50204
Conducted emissions To EN 50081-2, from 150kHz to 30MHz.Radiated emissions To EN 50081-2, from 30kHz to 1000MHz.Nett Mass 3.1kgOverall RLC Relaydimensions
103(w) x 177(h) x 248(d)
RLC RELAY (Rev.01.26.09.97) Page 104 of 140
APPENDIX 3: TECHNICAL SPECIFICATIONS
Measuring elements QuantityNominal rated current, InContinuous currentShort time currentBurden 1ABurden 5A
41A / 5A3A / 15A100A for 1s/300A for 1s<50mΩ<20mΩ
Auxiliary power supply Nominal rated voltage, VxOperative range (dc)Operative range (ac)Burden with dc supplyBurden with ac supply
30 - 250V ac/dc24 - 300V dc40 - 250V ac<14W with all relays and back-light ON<24VA with all relays and back-light ON
Output relays QuantityContact form (per relay)
Alarm/trip relays: 5 Self-supervision relay: 11 – changeover contact (form C), user configurableas N/O or N/C
Load Resistive load:(cosφ = 1)
Inductive load:(cosφ = 0,4 L/R = 7 ms)
Rated load 5A at 250 VAC:5A at 30 VDC
3,5A at 250 VAC:2,5A at 30 VDC
Rated carry current 5AMax. operating voltage 380VAC, 125 VDCMax. operating current 5AMax. switching power 1,250 VA, 150W 875 VA, 75WMin. permissible load 100mA at 5 VDC
Digital input channel QuantityFunction
IsolationTypeResponse time
1Circuit breaker ON/OFF signal, via breaker auxiliarycontact.Optically isolated24 – 250V ac/dc voltage input10ms
Pushbuttons QuantityFunctionType
5À, ¿, Á, Â, and ACCEPT (red)Miniature spring loaded manual pushbuttons
Display QuantityType
Screen SizeCharacter height
1Back-lit Liquid Crystal Display (LCD), with full alpha-numeric character set16 character x 2 line4mm
Indicators QuantityTypeFunction
3Light Emitting Diodes (LEDs)Green : POWER ON / HEALTHYYellow : ALARMRed : TRIP
Serial data port QuantityIsolationType
1Optically isolatedRS232 or RS485
RLC RELAY (Rev.01.26.09.97) Page 105 of 140
Normal Functions Peak repetitive overvoltage protectionThermal overcurrent protectionFundamental frequency star point unbalanceprotectionFundamental frequency line current unbalanceprotectionFundamental frequency overvoltage and overcurrentprotectionFundamental frequency undercurrent protectionBreaker fail protectionDischarge timer protection
Protection
“H” CONFIGURATION Functions Fundamental frequency “H” CONFIGURATIONcapacitor bank unbalance protection
ACCURACYParameter Level Measurement error (25°C) Trip time errorI1, Ilub 0.25In to 10In ±2% ±2% + (10 to 40)msIo 0.05In to 10In ±3% ±3% + (10 to 40)msIub 0.1In to 2In ±2% ±2% + (10 to 40)ms∠Iub 0.1In to 2In ±2° 660msvc 0.25Vn to 10Vn ±2% ±4% + (10 to 40)msIth 0.25In to 10In
1fn to 5fn 5fn to 25fn
+2%+5%
±5% + 1s
RLC RELAY (Rev.01.26.09.97) Page 106 of 140
APPENDIX 4: SETTABLE PARAMETERS AND SETTING RANGES
PARAMETER DESCRIPTION SETTINGRANGE
SETTINGRESOLUTION
Icr/In The capacitor rated current per unit of line currenttransformer nominal primary current,
0,25 to 1,50 0,01
vc>/vcr The low-set peak repetitive voltage threshold per unit ofcapacitor rated peak repetitive voltage.
0,80 to 1,50 0,01
vc>>/vcr The high-set peak repetitive voltage threshold per unit ofcapacitor rated peak repetitive voltage.
0,80 to 1,501,6 to 10,0
0,010,1
vc>>:xt The definite timer setting (in seconds) associated with thehigh-set peak repetitive voltage threshold.
0,00 to 1,001,1 to 10,0
0,010,1
vc>reset:xt Reset timer for overvoltage vc>/vcr timer 1 to 60 1Ith>/In The thermal response overcurrent threshold per unit of line
current transformer nominal primary current.0,25 to 1,50 0,01
τ The heating / cooling time constant (in seconds) for thecalculation of the thermal current response to the rmsheating current
6 to 120130 to 7200
110
I1>/In The low-set fundamental frequency overcurrent thresholdper unit of line current transformer nominal primarycurrent.
0,25 to 1,50 0,01
I1>:xt The definite timer setting (in seconds) associated with thelow-set fundamental frequency overcurrent threshold.
1 to 120130 to 1200
110
I1>>/In The high-set fundamental frequency overcurrent thresholdper unit of line current transformer nominal primarycurrent.
0,5 to 10,0 0,1
I1>>:xt The definite timer setting (in seconds) associated with thehigh-set fundamental frequency undercurrent threshold.
0,00 to 1,001,1 to 10,0
0,010,1
I1</In The low-set fundamental frequency undercurrent thresholdper unit of line current transformer nominal primarycurrent.
0,10 to 1,00 0,01
I1<:xt The definite timer setting (in seconds) associated with thelow-set fundamental frequency star point unbalancecurrent threshold.
0,1 to 10,0 0,1
Iub>/In The low-set fundamental frequency star point unbalancecurrent threshold, per unit of star point unbalance currenttransformer nominal primary current.
0,05 to 1,00 0,01
Iub>:xt The definite timer setting (in seconds) associated with thelow-set fundamental frequency star point unbalancecurrent threshold.
0,1 to 10,011 to 60
0,11
Iub>>/In The high-set fundamental frequency star point unbalancecurrent threshold, per unit of star point unbalance currenttransformer nominal primary current.
0,05 to 2,00 0,01
Iub>>:xt The definite timer setting (in seconds) associated with thehigh-set fundamental frequency star point unbalancecurrent threshold.
0,0 to 10,011 to 60
0,11
Io>/In The low-set fundamental frequency earth fault currentthreshold per unit of line current transformer nominalprimary current.
0,05 to 1,00 0,01
Io>:xt The definite timer setting (in seconds) associated with thelow-set fundamental frequency earth fault currentthreshold.
0,1 to 10,011 to 60
0,011
RLC RELAY (Rev.01.26.09.97) Page 107 of 140
Io>>/In The high-set fundamental frequency earth fault currentthreshold per unit of line current transformer nominalprimary current.
0,05 to 1,001,1 to 10,0
0,010,1
Io>>:xt The definite timer setting (in seconds) associated with thehigh-set fundamental frequency earth fault currentthreshold.
0,0 to 10,0 0,1
Ilub>/In The low-set fundamental frequency line unbalance currentthreshold per unit of line current transformer nominalprimary current.
0,05 to 1,00 0,01
Ilub>:xt The definite timer setting (in seconds) associated with thelow-set fundamental frequency line unbalance currentthreshold.
0,1 to 10,011 to 60
0,11
Ilub>>/In The high-set fundamental frequency line unbalancecurrent threshold per unit of line current transformernominal primary current.
0,01 to 1,00 0,01
Ilub>>:xt The definite timer setting (in seconds) associated with thehigh-set fundamental frequency line unbalance currentthreshold.
0,0 to 10,0 0,11
Bfail1:xt The definite timer setting (in seconds) associated with thebreaker fail detection after a trip, in the event that the faulthas not been cleared by the breaker.
0,05 to 2,0 0,01
Bfail2:xt The definite timer setting (in seconds) associated with thebreaker fail detection and the Bon input signal.
0,05 to 2,0 0,01
Bena:xt The definite timer setting (in seconds) associated with thebreaker enable / capacitor bank discharge timer logic.
1 to 6070 to 600
110
Bon Multi-function opto-isolated digital input Breaker-BonOR
Remote ResetOR
DisabledaIub>/In The “a” phase low-set fundamental frequency “H”
CONFIGURATION MODE unbalance current thresholdper unit of unbalance current transformer nominal primarycurrent.
0,05 to 1,00 0,01
bIub>/In The “b” phase low-set fundamental frequency “H”CONFIGURATION MODE unbalance current thresholdper unit of unbalance current transformer nominal primarycurrent.
0,05 to 1,00 0,01
cIub>/In The “c” phase low-set fundamental frequency “H”CONFIGURATION MODE unbalance current thresholdper unit of unbalance current transformer nominal primarycurrent.
0,05 to 1,00 0,01
aIub>>/In The “a” phase high-set fundamental frequency “H”CONFIGURATION MODE unbalance current thresholdper unit of unbalance current transformer nominal primarycurrent.
0,05 to 2,00 0,01
bIub>>/In The “b” phase high-set fundamental frequency “H”CONFIGURATION MODE unbalance current thresholdper unit of unbalance current transformer nominal primarycurrent.
0,05 to 2,00 0,01
cIub>>/In The “c” phase high-set fundamental frequency “H”CONFIGURATION MODE unbalance current thresholdper unit of unbalance current transformer nominal primarycurrent.
0,05 to 2,00 0,01
RLC RELAY (Rev.01.26.09.97) Page 108 of 140
aIub>:xt The definite timer setting (in seconds) associated with the“a” phase low-set fundamental frequency “H”CONFIGURATION MODE unbalance current threshold.
0,1 to 10,011 to 60
0,11
bIub>:xt The definite timer setting (in seconds) associated with the“b” phase low-set fundamental frequency “H”CONFIGURATION MODE unbalance current threshold.
0,1 to 10,011 to 60
0,11
cIub>:xt The definite timer setting (in seconds) associated with the“c” phase low-set fundamental frequency “H”CONFIGURATION MODE unbalance current threshold.
0,1 to 10,011 to 60
0,11
aIub>>:xt The definite timer setting (in seconds) associated with the“a” phase high-set fundamental frequency “H”CONFIGURATION MODE unbalance current threshold.
0,0 to 10,011 to 60
0,11
bIub>>:xt The definite timer setting (in seconds) associated with the“b” phase high-set fundamental frequency “H”CONFIGURATION MODE unbalance current threshold.
0,0 to 10,011 to 60
0,11
cIub>>:xt The definite timer setting (in seconds) associated with the“c” phase high-set fundamental frequency “H”CONFIGURATION MODE unbalance current threshold.
0,0 to 10,011 to 60
0,11
RLC RELAY (Rev.01.26.09.97) Page 109 of 140
APPENDIX 5: COMMISSIONING TEST RECORD
SITE:End User Address/Site__________________________________________________________________________________________________________________________________________
Substation, Switchboard and Circuit:__________________________________________________________________________________________________________________________________________
Contact :Phone :Phone :Fax :E-Mail :
________________________________________________________________________________________________________________________________________________________________
Contact :Phone :Phone :Fax :E-Mail :
___________________________________________________________________________________________________________________________________________________________
CT DETAILS:Element 1 2 3 4Ratio ______________ ______________ ______________ ______________Burden ______________ ______________ ______________ ______________Class ______________ ______________ ______________ ______________Voltage ______________ ______________ ______________ ______________
COMMISSIONED BY:Name :Signature :Company :Phone :Fax :Date :
________________________________________________________________________________________________________________________________________________________________________________________________
Address :______________________________________________________________________________________________________________________________________________________________________________________________________________________________________
RLC FRONT PLATE INFORMATION:ModelVersionSerial Number
: : :
____________________________________________________________________________________________________________________________________________________________________________________________________________
Rated current, In 1:2:
__________________________
AA
3:4:
________________________
AA
Rated frequency, fnAuxiliary voltage
: :
__________________________________________________________________
HzV
RLC CONFIGURATION SETTINGS – HARDWARE:Element Nominal Rated Current configuration (1A/5A):ElementElement
1 :2 :
__________________________________________
AA
ElementElement
3 :4 :
__________________________________________
AA
Output Relay Contact Form configuration (NO/NC) in auxiliary power off condition:RelayRelayRelay
#1:#2:#3:
_______________________________________________________________
RelayRelayRelay
#4:#5:#6:
_______________________________________________________________
RLC RELAY (Rev.01.26.09.97) Page 110 of 140
RLC RELAY CONFIGURATION SETTINGS – SOFTWARE:
NORMAL MODE:Elements 1, 2 and 3: Element 4:Icr/Invc>/vcrvc>>/vcrvc>>:xtvc>reset:xtIth>/InτI1>InI1>:xtI1>>/InI1>>:xtI1</InI1<:xtBfail1:xtBfail2:xtBena:xt
________________________________________________________________________________________________________________________________________________________________________________
Iub>/InIub>:xtIub>>/InIub>>:xt
Element 5:Io>/InIo>:xtIo>>/InIo>>:xtIlub/InIlub:xtIlub/InIlub:xt
____________________________________________
________________________________________________________________________________________
Function selected for digital input :
RLC RELAY (Rev.01.26.09.97) Page 111 of 140
Software outputs directed to output relays:
Relay # 1 2 3 4 5vc>startvc>tripvc>>tripI1>startI1>tripI1>>tripIth>startIth>tripI1<tripIub>startIub>tripIub>>tripIo>startIo>tripIo>>tripIlub>startIlub>tripIlub>>tripBfail1Bfail2BenaEnergize totripLatch on trip
________________________________________________________________________________________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________________________________________________________________________________________
RelayChecksums _________ _________ _________ _________ _________
RLC RELAY (Rev.01.26.09.97) Page 112 of 140
“H”-CONFIGURATION MODE
Elements 2, 3 and 4aIub>InaIub>:xtaIub>>/InaIub>>:xt
____________________________________________
bIub>/InbIub>:xtbIub>>/InbIub>>:xt
____________________________________________
cIub>/IncIub>:xtcIub>>/IncIub>>:xt
____________________________________________________________
Software outputs directed to output relaysRelay # 1 2 3 4 5aIub>startaIub>tripaIub>>tripbIub>startbIub>tripbIub>>tripcIub>startcIub>tripcIub>>tripEnergize totripLatch on trip
________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________________________
RelayChecksums: _________ _________ _________ _________ ___________
DIAGNOSTIC TEST FUNCTION:
Serial Number : __________________________________________________Software Version : __________________________________________________Pretest Code : __________________________________________________LCD display test : __________________________________________________LED test : __________________________________________________“Breaker on” signal input test : __________________________________________________Relay test: Relay #1 : __________________________________________________
Relay #2 : __________________________________________________Relay #3 : __________________________________________________Relay #4 : __________________________________________________Relay #5 : __________________________________________________
RLC RELAY (Rev.01.26.09.97) Page 113 of 140
PRIMARY / SECONDARY INJECTION TEST RESULTS(Refer to Appendix 11)
RLC RELAY (Rev.01.26.09.97) Page 114 of 140
COMMISSIONING CHECKLIST
Check for obvious physical damage⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check configuration of element rated currents⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check rating plate reflects correct element rated currents⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check configuration of output relay contact forms⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check mounting of relay⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check auxiliary power supply wiring⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check auxiliary power supply voltage at relay terminals⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check CT details and ratios⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check CT wiring⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check output relay voltage at relay terminals⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check output relay wiring⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check “breaker on” input signal voltage at relay terminals⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check “breaker on” input signal wiring⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check and record running screen displays⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Configure elements 1, 2, 3 ,4 and 5⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Configure output relays #1, #2 ,#3, #4 and #5⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Ensure the actual output relay check-sums correspond with the theoretical check-sums⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Record the complete protection relay configuration after saving the finalconfiguration⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Execute the diagnostic test function and record the results⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check correct operation of LED indicators⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check correct operation of post trip annunciation and resetting functions⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check output relays are tripping the circuit breaker, and other output relay functions⋅⋅⋅⋅⋅⋅Check operation of self-supervision relay⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Perform primary or secondary injection tests at CT terminals⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check that each CT is connected to the correct element⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅After energizing the associated circuit breaker, note the running displays and confirmthat they are correct. ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Ensure the relay’s front cover is fitted⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅
::::::::::::::::::::::::::::
:::
Yes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/No
Yes/No
Yes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/No
Yes/NoYes/No
RLC RELAY (Rev.01.26.09.97) Page 115 of 140
APPENDIX 6: FAULT REPORT
Date: _________________
TO: FROM:
STRIKE Technologies (Pty) Ltd ______________________________________
POSTAL ADDRESS: POSTAL ADDRESS:
P O Box 1810 ______________________________________Halfway House, 1685 ______________________________________Gauteng Province ______________________________________Republic of South Africa ______________________________________
PHYSICAL ADDRESS: PHYSICAL ADDRESS:
987 Richards Drive ______________________________________Halfway House, 1685 ______________________________________Gauteng Province ______________________________________Republic of South Africa ______________________________________
PHONE : +27 11 315-0815 PHONE : __________________FAX : +27 11 315-2559 FAX : __________________ATTENTION : Service/Repair ATTENTION : __________________
SITE:End User Address/Site: Substation, Switchboard and Circuit:______________________________________ ____________________________________________________________________________ ____________________________________________________________________________ ______________________________________
Contact : __________________________ Contact : __________________________Phone : __________________________ Phone : __________________________Fax : __________________________ Fax : __________________________
RLC RELAY (Rev.01.26.09.97) Page 116 of 140
RLC RELAY FRONT PLATE INFORMATION:
Model : _______________________________________________________Version : _______________________________________________________Serial Number : _______________________________________________________Rated current, In 1: ______________ A 3: _____________ A
2: ______________ A 4: _____________ ARated frequency, fn : ______________ HzAuxiliary voltage : ______________ V
DETAILS OF PROBLEM EXPERIENCED:__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
DETAILS OF RLC RELAY CONFIGURATION SETTINGS – HARDWARE:
Element nominal rated current configuration:Element 1: ________________ A Element 3: _________________ AElement 2: ________________ A Element 4: _________________ AOutput relay contact form configuration (in auxiliary power off condition):Relay #1: _______________________ Relay #4: __________________________Relay #2: _______________________ Relay #5: __________________________Relay #3: _______________________ Relay #6: __________________________
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RLC RELAY CONFIGURATION SETTINGS:
NORMAL MODE:
Elements 1, 2 and 3: Element 4:Icr/In __________ Iub>/In ___________vc>/vcr __________ Iub>:xt ___________vc>>/vcr __________ Iub>>/In ___________vc>>:xt __________ Iub>>:xt ___________vc>reset:xt __________Ith>In __________ Element 5τ __________ Io>/In ___________I1>/In __________ Io>:xt ___________I1>:xt __________ Io>>/In ___________I1>>/In __________ Io>>:xt ___________I1>>:xt __________ Ilub/In ___________I1</In __________ Ilub:xt ___________I1<:xt __________ Ilub/In ___________Bfail1:xt __________ Ilub:xt ___________Bfail2:xt __________Bena:xt __________Function selected for digital input:___________________________
Software outputs directed to output relays:
Relay # 1 2 3 4 5
vc>start __________ ___________ ___________ ___________ ___________vc>trip __________ ___________ ___________ ___________ ___________vc>>trip __________ ___________ ___________ ___________ ___________I1>start __________ ___________ ___________ ___________ ___________I1>trip __________ ___________ ___________ ___________ ___________I1>>trip __________ ___________ ___________ ___________ ___________Ith>start __________ ___________ ___________ ___________ ___________Ith>trip __________ ___________ ___________ ___________ ___________I1<trip __________ ___________ ___________ ___________ ___________Iub>start __________ ___________ ___________ ___________ ___________Iub>trip __________ ___________ ___________ ___________ ___________Iub>>trip __________ ___________ ___________ ___________ ___________Io>start __________ ___________ ___________ ___________ ___________Io>trip __________ ___________ ___________ ___________ ___________Io>>trip __________ ___________ ___________ ___________ ___________Ilub>start __________ ___________ ___________ ___________ ___________Ilub>trip __________ ___________ ___________ ___________ ___________Ilub>>trip __________ ___________ ___________ ___________ ___________
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Bfail1 __________ ___________ ___________ ___________ ___________Bfail2 __________ ___________ __________ __________ __________Bena __________ ___________ ___________ ___________ ___________Energize to trip __________ ___________ ___________ ___________ ___________Latch on trip __________ ___________ ___________ ___________ ___________RelayChecksums _________ ___________ ___________ ___________ ___________
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H-CONFIGURATION MODE:
Elements 2, 3 and 4aIub>InaIub>:xtaIub>>/InaIub>>:xt
____________________________________________
bIub>/InbIub>:xtbIub>>/InbIub>>:xt
____________________________________________
cIub>/IncIub>:xtcIub>>/IncIub>>:xt
____________________________________________
Software outputs directed to output relaysRelay # 1 2 3 4 5aIub>startaIub>tripaIub>>tripaIub>startaIub>tripbIub>>tripcIub>startcIub>tripcIub>>tripEnergize to tripLatch on trip
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________
RelayCheck sums: ___________ ___________ ___________ ___________ ___________
DIAGNOSTIC TEST FUNCTION:Serial Number : __________________________________________________Software Version : __________________________________________________Pretest Code : __________________________________________________LCD display test : __________________________________________________LED test : __________________________________________________“Breaker on” signal input test : __________________________________________________Relay test: Relay #1 : __________________________________________________
Relay #2 : __________________________________________________Relay #3 : __________________________________________________Relay #4 : __________________________________________________Relay #5 : __________________________________________________
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PRIMARY / SECONDARY INJECTION TEST RESULTS(Refer to Appendix 11)
RLC RELAY (Rev.01.26.09.97) Page 121 of 140
FAULT REPORT CHECKLIST
Check for obvious physical damage⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check configuration of element rated currents⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check rating plate reflects correct element rated currents⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check configuration of output relay contact forms⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check mounting of relay⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check auxiliary power supply wiring⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check auxiliary power supply voltage at relay terminals⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check and record the CT ratios and ratings⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check CT wiring⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check output relay voltage at relay terminals⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check output relay wiring⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check “breaker on” input signal voltage at relay terminals⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check “breaker on” input signal wiring⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check and record running screen displays⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check and record configuration of elements 1, 2, 3, 4 and 5⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check and record configuration of relays #1, #2, #3, #4 and #5⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check and record the checksums of relays #1, #2, #3, #4, and #5⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Execute the diagnostic test function and record the results⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check the correct operation of LED indicators⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check the correct operation of the post trip fault annunciation and resetting functionsCheck the output relays are tripping the circuit breaker, and the other output relayfunctions⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check the operation of the self-supervision relay⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Perform primary or secondary injection tests at the CT terminals⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅Check that each CT is connected to the correct element⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅
:::::::::::::::::::::
::::
Yes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/NoYes/No
Yes/NoYes/NoYes/NoYes/No
RLC RELAY (Rev.01.26.09.97) Page 122 of 140
APPENDIX 7: DIAGNOSTIC ERRORS
On application of auxiliary supply voltage to a RLC Relay, and at regular intervals duringnormal operation, the relay performs a number of self-test diagnostic functions. Any errorsdetected will cause the RLC Relay to suspend all protective functions, continuously togglethe self-supervision relay at approximately 1 second intervals and display an error messageas follows:
ONLINE DIAGNOSTICS:
RLC MESSAGE DISPLAY ERROR DESCRIPTION
EPROM error EPROM checksumEEPROM error Serial EEPROM checksumRAM error RAM failureDSP stopped DSP watchdog failure
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APPENDIX 8: NORMAL MODE CALCULATION OF CHECKSUMS FOR OUTPUT RELAYS #1TO #5
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APPENDIX 9: “H” CONFIGURATION MODE CALCULATION OF CHECKSUMS FOR OUTPUTRELAYS #1 TO #5
RLC RELAY (Rev.01.26.09.97) Page 125 of 140
APPENDIX 10: DEFAULT HARDWARE AND SOFTWARE CONFIGURATION ON DELIVERY:
ElementElementElementElement
1234
5555
AAAA
RelayRelayRelayRelayRelay
#1#2#3#4#5
N/ON/ON/ON/ON/O
NORMAL MODE:
Elements 1, 2 and 3: Element 4:Icr/In 1,0 Iub>/In 0,5vc>/vcr 1,1 Iub>:xt 10,0vc>>/vcr 3,0 Iub>>/In 1,0vc>>:xt 0,0 Iub>>:xt 1,0vc>reset:xt 60Ith>In 1,0 Element 5τ 60 Io>/In 0,1I1>/In 1,1 Io>:xt 1,0I1>:xt 600 Io>>/In 0,3I1>>/In 1,5 Io>>:xt 0,0I1>>:xt 0,0 Ilub/In 0,05I1</In 0,2 Ilub:xt 10,0I1<:xt 0,2 Ilub/In 0,10Bfail1:xt 0,1 Ilub:xt 1,0Bfail2:xt 0,1Bena:xt 300Function selected for digital input:Disabled
Software outputs directed to output relays:
Relay # 1 2 3 4 5
vc>start 1 0 0 0 0vc>trip 0 0 1 0 0vc>>trip 0 0 1 0 0I1>start 1 0 0 0 0I1>trip 0 0 1 0 0I1>>trip 0 0 1 0 0Ith>start 1 0 0 0 0Ith>trip 0 0 1 0 0I1<trip 0 0 1 0 0Iub>start 0 0 0 0 0
RLC RELAY (Rev.01.26.09.97) Page 126 of 140
Iub>trip 1 1 0 0 0Iub>>trip 0 0 1 0 0Io>start 1 0 0 0 0Io>trip 0 0 1 0 0Io>>trip 0 0 1 0 0Ilub>start 0 0 0 0 0Ilub>trip 0 1 0 0 0Ilub>>trip 0 0 1 0 0Bfail1 0 0 0 0 1Bfail2 0 0 0 0 1Bena 0 0 0 1 0Energize to trip 1 1 1 1 1Latch on trip 0 0 1 0 1RelayCheck sums: 491402 001042 36CB23 000006 00001B
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PLEASE NOTE: THE RLC RELAY IS DELIVERED CONFIGURED FOR NORMAL MODE. THEFOLLOWING “H” CONFIGURATION DEFAULT SETTINGS WILL BECOME ACTIVE ONLY IFTHE USER CHANGES THE RLC RELAY TO “H” CONFIGURATION MODE.
“H”-CONFIGURATION MODE:Elements 2, 3 and 4aIub>In 0,5 bIub>/In 0,5 cIub>/In 0,5aIub>:xt 10,0 bIub>:xt 10,0 cIub>:xt 10,0aIub>>/In 1,0 bIub>>/In 1,0 cIub>>/In 1,0aIub>>:xt 1,0 bIub>>:xt 1,0 cIub>>:xt 1,0
Software outputs directed to output relays
Relay # 1 2 3 4 5
aIub>start 1 0 0 0 0aIub>trip 0 1 0 0 0aIub>>trip 0 0 0 0 1bIub>start 1 0 0 0 0bIub>trip 0 0 1 0 0bIub>>trip 0 0 0 0 1cIub>start 1 0 0 0 0cIub>trip 0 0 0 1 0cIub>>trip 0 0 0 0 1Energize to trip 1 1 1 1 1Latch on trip 0 0 0 0 1RelayCheck sums: 492 202 042 00A 127
RLC RELAY (Rev.01.26.09.97) Page 128 of 140
APPENDIX 11: INJECTION TESTING
The RLC Relay is a complex device with many sophisticated protective functions. It is beyond thescope of this manual to fully detail how to comprehensively injection test the RLC Relay. Howeverthe following points should be noted.
Ideally to properly test the RLC Relay, one would require a 3 phase secondary injection test setwith the ability to inject not only mains frequency currents, but also complex 3 phase waveformswith harmonic currents superimposed or the fundamental currents. In this way one can properlytest and confirm the peak repetitive overvoltage protective functions, the rms thermal overcurrentprotective functions, and the mains frequency current protective functions including the star or “H”CONFIGURATION unbalance, line unbalance, earth fault, fundamental frequency over and undercurrent, breaker fail and breaker enable timer. Contact STRIKE Technologies (Pty) Ltd for furtherdetails on their VERITY 3 phase secondary current and voltage injection test set, which is capableof performing such tests.
Often the user will only have access to a single phase current injection test set. In this case theuser should preferably test each element separately, one protective function at a time, with allother protective functions disabled.
If testing several protective functions and/or elements simultaneously, the following must be kept inmind:
• The earth fault current Io is derived mathematically as the vector summation of the phasecurrents of elements 1, 2 and 3. Therefore the earth fault protective function should be testedby injecting 1/3 of the desired earth fault current into elements 1, 2 and 3 connected in series.This will generally avoid the other protective functions, including the line unbalance currentprotective function, from operating before the earth fault protective function.
• In order to test the line unbalance current function, inject a low magnitude single phase currentinto elements 1 and 2 (or elements 2 and 3) connected in series but with opposite polarities.This will avoid the earth fault protective function from operating.
• In order to test the overcurrent, undercurrent and thermal current, protective functions ofelements 1, 2 and 3, disable the earth fault protective function and inject a single phase currentinto elements 1, 2 and 3 connected in series. This will avoid both the earth fault and the lineunbalance current protective functions from operating. Alternatively disable both the earth faultand the line unbalance current protection functions. This will enable elements 1, 2 and 3 to betested individually, without all 3 elements connected in series.
• Without the ability to inject harmonic currents superimposed onto the fundamental current, thepeak repetitive overvoltage protective function of element 1, 2 and 3 can be easily tested bydisabling all other protective functions, and injecting a sinusoidal current into element 1, 2 or 3.It is suggested that Icr/In = 1 and vc>/vcr = 1,1 should be set. In this case, when a sinusoidalcurrent equal to In is injected (1A or 5A rms) then the calculated peak repetitive voltage vc/vcrshould be 1p.u. The vc>starter should operate for injected currents above 1,1In. Trip times forcurrents above the threshold (1,1In) may be checked against the inverse time curve of Fig. 8.
RLC RELAY (Rev.01.26.09.97) Page 129 of 140
APPENDIX 12: SETTING EXAMPLE 1
Single star capacitor bank on a 6,6kV 3 phase 50Hz system.
Refer to Fig. 9
System : 6,6kV + 7,5%, 3 phase, 50Hz, 20kA fault levelEarthing : Earth fault current limited to 300A by Neutral Earthing ResistorSwitch : 400A fused vacuum contactor with 160A current limiting fusesLine CT’s : 75/5ACable : 50mmð XLPEDamping reactors : 80H per phase
60A rms continuous current ratingCapacitor bank : Single star arrangement
Rated output: 600 kvarRated voltage and frequency: 7,2kV 50HzRated current Icr = 600/( 32,7 ⋅ ) = 48,1AI1 at 6,6kV = (6,6/7,2)·52,5 = 48,11 = 44,1A
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SETTINGS:
Icr/In = 48,11/75=0,64 (1)vc>/vcr = 1,1 (2)vc>>/vcr = 3,0 (3)vc>>:xt = 0 (4)vc>reset:xt = 30s (5)Ith>/In = 60/75=0,8 (6)τ = 600s (7)I1>/In = 1,1·48,2/75=0,71 (8)I1>:xt = 600s (9)I1>>/In = 1,5·48,2/75=0,96 (10)I1>>:xt = 0 (11)I1</In = 0,2·48,2/75=0,13 (12)I1<:xt = 0,2s (13)Bfail1:xt = 0,1s (14)Bfail2:xt = 0,1s (14)Bena:xt = 300s (15)Function selected for digital input: Breaker-Bon (16)Iub>/In = N/A (17)Iub>:xt = 0,1s (18)Iub>>/In = N/A (19)Iub>>:xt = 0,1s (20)Io>/In = 0,2·48,2/75=0,13 (21)Io>:xt = 0 (22)Io>>/In = N/A (23)Io>>:xt = 0 (24)Ilub>/In = 0,05·48,2/75=0,03 (25)Ilub>:xt = 2s (26)Ilub>>/In = 0,1·48,2/75=0,06 (27)Ilub>>:xt = 0,2s (28)
RLC RELAY (Rev.01.26.09.97) Page 131 of 140
NOTES ON SETTINGS:
(1) Capacitor rated current in p.u. of line CT primary current.
(2) Capacitors made to IEC can withstand 110% of rated voltage for extendedperiods of time, and this would be the normal setting in practically all cases.
(3) With reference to Fig.7, it can be seen that for vc/vcr greater than 3,0 thepeak repetitive overvoltage withstand curve is undefined and therefore forcapacitor overvoltages above this value it is considered appropriate to tripwith a definite time delay.
(4) The associated definite delay is set at 0 (No intentional time delay).
(5) Refer to Fig.25 to see the effect of vc>reset:xt.
(6) The thermal overcurrent threshold should be set as the lowest continuousrms current rating of the series circuit.
(i.e. in this example the damping reactor current rating is the lowest of that ofthe fuses, contactor, cable, damping reactors and capacitor bank.)
(7) Refer to Appendix 14 for some guidance of the heating/cooling time constantof air-cored reactors. The time constant is the time taken for the reactors toreach 63% of their final temperature, for a step change in current from 0 to100%.
(i.e. the first order exponential time constant of the device.)
(8) For a system having a maximum system voltage of 107,5% of nominal, a lowset fundamental frequency overvoltage/overcurrent limit of 110% isconsidered appropriate. Above this value the associated definite timer willstart timing out.
(9) A value of 600s for this definite timer is considered appropriate to allow anyautomatic tap-changers to operate in the case of extended fundamentalfrequency system overvoltages (which in time causes fundamental frequencyovercurrent in the capacitor circuit).
(10) A fundamental frequency overcurrent above 150% of nominal would indicatea catastrophic failure of some kind requiring immediate tripping.
(11) Therefore the associated definite time delay is set to 0 (no intentional delay).
(12) Any undercurrent threshold significantly below nominal is appropriate.
RLC RELAY (Rev.01.26.09.97) Page 132 of 140
(13) The undercurrent definite timer is set as 0,2s or any appropriate low value toavoid spurious trip outs.
(14) The breaker fail timer is set as 0,1s or any appropriate low value to avoidspurious breaker fail signal output.
(15) The breaker enable timer is set to enable breaker re-energization 300s(5min) after de-energization to allow the capacitor to discharge beforeswitching on again.
(16) Setting the digital input to Breaker-Bon allows the breaker enablere-switching timer and the undercurrent protection function to be used.
(17) – (20) These parameters are disabled because star point unbalance protection isnot provided (capacitor bank has a single star or delta configuration).Because the thresholds are disabled the timer setting is irrelevant.
(21) The fundamental frequency earth fault threshold is set to any suitable lowvalue below the 300A maximum earth fault current (as limited by the NeutralEarthing Resistor).
(22) The definite time delay is set to 0 (no intentional delay).
(23) Because the low set earth fault threshold definite time delay is set to 0, thehigh set threshold is disabled.
(24) Because the high-set threshold is disabled, the timer setting is irrelevant.
(25) The low set line unbalance current threshold should be set as low aspossible whilst avoiding spurious trip outs due to normal system line voltageunbalance. A line unbalance current of 5% of nominal capacitor current isconsidered suitable.
(26) The definite timer associated with the above is set at 2s to avoid trip out onshort term unbalance disturbance.
(27) The high set line unbalance current threshold is set as 10% of nominalcapacitor current.
(28) The definite timer associated with the above is set as 0,2s.
RLC RELAY (Rev.01.26.09.97) Page 133 of 140
APPENDIX 13: SETTING EXAMPLE 2
20Mvar third harmonic series tuned filter with a double star capacitor bank on a 33kV3 ph 50Hz system.
Refer to Fig. 10
System : 33kV + 5%, 3 phase, 50Hz, 20kA fault levelEarthing : Solidly earthedSwitch : 630A SF6 circuit breakerLine CT’s : 500/5ACable : 185mmð XLPEFilter : Output at 33kV 50Hz:20Mvar (lead)
Tuned frequency:145HzInductance: 20,6mH per phaseFilter reactors :Rated currents: I1
I2I3I4I5I7I11I13
========
385A30A90A25A30A20A10A5A
Irms =
∑=
13
1n
2In )( = 400A
Capacitor bank : Double star configurationRated capacitance: 58,464 µF per phaseRated output: 37,193MvarRated voltage and frequency: 45kV 50HzRated current Icr = 37,193 ⋅106/( 3 ⋅45000)
I1 at 33kV = 20 ⋅106/( 3 ⋅33000)Star point unbalance alarm current: 4AStar point unbalance trip current: 8A
Unbalance CT : 20/1A
RLC RELAY (Rev.01.26.09.97) Page 134 of 140
SETTINGS:
Icr/In = 477/500=0,95 (1)vc>/vcr = 1,1 (2)vc>>/vcr = 3,0 (3)vc>>:xt = 0 (4)vc>reset:xt = 30s (5)Ith>/In = 400/500=0,8 (6)τ = 1200s (7)I1>/In = 1,075·350/500=0,81 (8)I1>:xt = 600s (9)I1>>/In = 1,5·350/500=1,05 (10)I1>>:xt = 0 (11)I1</In = 0,2·350/500=0,14 (12)I1<:xt = 0,2s (13)Bfail1:xt = 0,1s (14)Bfail2:xt = 0,1s (14)Bena:xt = 300s (15)Function selected for digital input: Breaker-Bon (16)Iub>/In = 4/20=0,2 (17)Iub>:xt = 10s (18)Iub>>/In = 8/20=0,4 (19)Iub>>:xt = 2s (20)Io>/In = 0,2·350/500=0,14 (21)Io>:xt = 0 (22)Io>>/In = N/A (23)Io>>:xt = 0 (24)Ilub>/In = 0,05·350/500=0,04 (25)Ilub>:xt = 2s (26)Ilub>>/In = 0,1·350/500=0,07 (27)Ilub>>:xt = 0,2s (28)
RLC RELAY (Rev.01.26.09.97) Page 135 of 140
NOTES ON SETTINGS:
(1) Capacitor rated current in p.u. of line CT primary current.
(2) Capacitors made to IEC can withstand 110% of rated voltage for extendedperiods of time.
(3) With reference to Fig.7, it can be seen that for vc/vcr greater than 3,0 thepeak repetitive overvoltage withstand curve is undefined and therefore forcapacitor overvoltages above this value it is considered necessary to trip witha definite time delay.
(4) The definite time delay should be set as low as possible, preferably with nointentional delay.
(5) Refer to Fig.25 to see the effect of vc>reset:xt.
(6) The thermal overcurrent threshold should be set as the lowest continuousrms current rating of the series circuit.
(i.e. in this example the filter reactor current rating is the lowest of that of thebreaker, cable, filter reactors and capacitor bank.)
(7) Refer to Appendix 14 for some guidance of the heating/cooling time constantof air-core filter reactors. The time constant is the time taken for the reactorsto reach 63% of their final temperature, for a step change in current from 0 to100%.
(i.e. the first order exponential time constant of the device.)
(8) For a system having a maximum system voltage of 105% of nominal, a lowset fundamental frequency overvoltage/overcurrent limit of 107,5% isconsidered appropriate. Above this value the associated definite timer willstart timing out.
(9) A value of 600s for this definite timer is considered appropriate to allow anyautomatic tap-changers to operate in the case of extended fundamentalfrequency system overvoltages (which in time causes fundamental frequencyovercurrents in the capacitor/filter circuit).
(10) A fundamental frequency overcurrent above 150% of nominal would indicatea catastrophic failure of some kind requiring immediate tripping.
(11) Therefore the associated definite time delay is set to 0 (no intentional delay).
(12) Any undercurrent threshold significantly below nominal current isappropriate.
RLC RELAY (Rev.01.26.09.97) Page 136 of 140
(13) The undercurrent definite timer is set as 0,2s or any appropriate low value toavoid spurious trip outs.
(14) The breaker fail timer is set as 0,1s or any appropriate low value to avoidspurious breaker fail signal output.
(15) The breaker enable timer is set to enable breaker re-energization 300s(5min) after de-energization to allow the capacitor to discharge beforeswitching on again.
(16) Setting the digital input to Breaker-Bon allows the breaker enablere-switching timer and the undercurrent protection function to be used.
(17) The star point unbalance “alarm” current is set in p.u. of the star pointunbalance CT primary current. The star point “alarm” current level should beprovided by the capacitor unit and bank designer/manufacturer as it isdetermined by the specific capacitor unit and capacitor bank design(internally fused, externally fused, internal element configuration, externalcapacitor unit interconnections, etc.).
(18) The definite timer associated with the above is set as 10s to avoid alarms onshort term unbalance disturbances.
(19) The star point unbalance “trip” current is set in p.u. of the star pt unbalanceCT primary current. The star point “trip” current level should be provided bythe capacitor unit and bank designer/manufacturer.
(20) The definite timer associated with the above is set as 2s to avoid spurioustrips on short term unbalance disturbances. Also this timer should not be setless than 1s due to the response time of the calculation of the phase angle ofthe unbalance current, if the phase angle of this unbalance current is ofinterest to the user after a trip out.
(21) The fundamental frequency earth fault threshold is set to any suitably lowvalue below the expected earth fault current (as limited by the system andearth fault zero sequence impedance.
(22) The definite time delay is set to 0 (no intentional delay).
(23) Because the low set earth fault threshold definite time delay is set to 0, thehigh-set threshold is disabled.
(24) Because the high-set threshold is disabled, the timer setting is irrelevant.
RLC RELAY (Rev.01.26.09.97) Page 137 of 140
(25) The low-set line unbalance current threshold should be set as low aspossible whilst avoiding spurious trip outs due to normal system line voltageunbalance. A line unbalance current of 5% of nominal capacitor current isconsidered suitable.
(26) The definite timer associated with the above is set at 2s to avoid trip out onshort term unbalance disturbances.
(27) The high-set line unbalance current threshold is set as 10% of nominalcapacitor current.
(28) The definite time associated with the above is set as 0,2s
RLC RELAY (Rev.01.26.09.97) Page 138 of 140
APPENDIX 14: CALCULATION OF THE REACTOR HEATING AND COOLING TIMECONSTANT (τ)
The correct heating and cooling time constant of a damping or filter reactor should normallybe obtained from the reactor manufacturer.
The formula below is considered accurate for reactor coils manufactured by Haefely-TrenchAustria, but may give default results in the absence of any other information.
τ = C1 * M/A
Where:
C1 Constant of convection and radiation and heat capacity
C1=100 for single layer coilsC1 = 76 for multi layer coils
m Mass of winding (Aluminium and insulation) [kg]A Surface for convection and radiation [mð]
For single – layer coil : A = (D1 + D2) * Hw * Π
For double – layer coil : A =
+
2
2D1D * Π * Hw * 2,5
For n – layer coil : A =
+
2
2D1D * Π * Hw * n
D1.⋅⋅⋅⋅⋅⋅⋅⋅Inner diameter [m]D2 ⋅⋅⋅⋅⋅⋅⋅⋅Outer diameter [m]Hw⋅⋅⋅⋅⋅⋅⋅⋅⋅Winding height [m]
D 2
Hw
D1 Terminal
RLC RELAY (Rev.01.26.09.97) Page 139 of 140
APPENDIX 15: MENU NAVIGATION CHART (NORMAL MODE)
Any
nor
mal
ope
rati
ngD
ispl
ay
Acc
ess
PAR
AM
ET
ER
SET
UP
men
uA
cces
s
OU
TPU
TR
EL
AY
m
enu
Run
DIA
GN
OST
ICT
EST
se
quen
ceB
row
se T
RIP
HIS
TO
RY
list
Acc
ess
SE
RIA
LPO
RT
opt
ions
Acc
ess
PA
SSW
OR
DSE
TU
P m
enu
Acc
ess
MO
DE
SET
UP
sel
ecto
r
Sele
ct
MO
DE
NO
RM
AL
Sele
ct
MO
DE
H-B
RID
GE
Old
Pa
ssw
ord
0 000
00Se
t BA
UD
RA
TE
to24
00
Tri
p
His
tory
No
1
Tri
p
His
tory
No
1
N
o T
rips
Seri
al
Num
ber
9701
0012
Soft
war
e
Ver
sion
1.05
06
-04-
02Pr
etes
t C
ode
Pass
edT
est
: L
ED
’s(C
heck
fla
shin
g)T
est
: I
nput
Inpu
t =
OFF
Tes
t Rel
ays?
Yes
CA
UT
ION
!!
Ret
urn
to M
EN
UY
es
Rel
ay :
#
1234
5vc
/sta
rt
0
0000
New
Pa
ssw
ord
0 000
00
Rel
ay :
#
1234
5vc
>tri
p
0 0
000
Rel
ay :
#
1234
5vc
>>tr
ip
0
0000
Rel
ay :
#
1234
5I1
>sta
rt
0 0
000
Rel
ay :
#
1234
5I1
>tri
p
000
00R
elay
:
#12
345
I1>>
trip
0 000
0
Rel
ay :
#
1234
5It
h>st
art
0
0000
Rel
ay :
#
1234
5It
h>tr
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0 0
000
Rel
ay :
#
1234
5I1
<tri
p
000
00R
elay
:
#12
345
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star
t
000
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elay
:
#12
345
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trip
0 000
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:
#12
345
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>tri
p
000
00
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ay :
#
1234
5Io
>sta
rt
0
0000
Rel
ay :
#
1234
5Io
>tri
p
0 0
000
Rel
ay :
#
1234
5Io
>>tr
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0
0000
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ay :
#
1234
5I1
ub>s
tart
0 000
0R
elay
:
#12
345
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>tri
p
000
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:
#12
345
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>>tr
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0 0
000
Rel
ay :
#
1234
5B
fai
l 1
0
0000
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ay :
#
1234
5B
fai
l 2
0
0000
Rel
ay :
#
1234
5B
ena
0
0000
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rgis
e
#12
345
to tr
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0 0
000
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ch
#
1234
5on
trip
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00R
elay
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heck
sum
0000
02
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EL
EM
EN
T1,
2,3
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iabl
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t E
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NT
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t O
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tion
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pens
ate?
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eN
o
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T
func
tion
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et
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T
func
tion
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INPU
T
func
tion
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able
d
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il1:
xt =
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ge=0
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ge=0
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ge=1
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tory
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3
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p
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tory
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3
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p
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tory
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4
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p
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4
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p
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tory
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5
Tri
p
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tory
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5
N
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AC
CE
PT
key
SEL
EC
T A
CT
ION
Res
ume
AC
CE
PT
key
Set
EL
EM
EN
T1,
2,3
var
iabl
es
AC
CE
PT
key
AC
CE
PT
key
SEL
EC
T A
CT
ION
Res
ume
AC
CE
PT
key
AC
CE
PT
key
AC
CE
PT
key
AC
CE
PT
key
SEL
EC
T A
CT
ION
Res
ume
AC
CE
PT
key
AC
CE
PT
key
Tes
t R
elay
#1
No
Â
Â
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t R
elay
#2
No
Â
Â
Tes
t R
elay
#3
No
Â
Â
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t R
elay
#4
No
Â
Â
Tes
t R
elay
#5
No
Â
Â
AC
CE
PT
key
Seri
al
Num
ber
9701
0012
for
5 se
cond
s
AC
CE
PT
key
RLC RELAY (Rev.01.26.09.97) Page 140 of 140
APPENDIX 16: MENU NAVIGATION CHART (“H” CONFIGURATION MODE)A
ny n
orm
al o
pera
ting
Dis
play
Acc
ess
PAR
AM
ET
ER
SET
UP
men
uA
cces
s
OU
TPU
TR
EL
AY
m
enu
Run
DIA
GN
OST
ICT
EST
se
quen
ceB
row
se T
RIP
HIS
TO
RY
list
Acc
ess
SE
RIA
LPO
RT
opt
ions
Acc
ess
PA
SSW
OR
DSE
TU
P m
enu
Acc
ess
MO
DE
SET
UP
sel
ecto
r
Sele
ct
MO
DE
NO
RM
AL
Sele
ct
MO
DE
H-B
RID
GE
Old
Pa
ssw
ord
0000
00Se
t BA
UD
RA
TE
to24
00
Tri
p
His
tory
No
1
Tri
p
His
tory
No
1
N
o T
rips
Seri
al
Num
ber
9701
0012
Soft
war
e
Ver
sion
1.05
06
-04-
02Pr
etes
t C
ode
Pass
edT
est
: L
ED
’s(C
heck
fla
shin
g)T
est
: I
nput
Inpu
t =
OFF
Tes
t Rel
ays?
Yes
CA
UT
ION
!!
Ret
urn
to M
EN
UY
es
Rel
ay :
#
1234
5aI
ub>s
tart
0
0000
New
Pa
ssw
ord
0000
00
Rel
ay :
#
1234
5aI
ub>
trip
0000
0R
elay
:
#12
345
aIub
>>
trip
0000
0R
elay
:
#12
345
bIub
>st
art
0
0000
Rel
ay :
#
1234
5bI
ub>
trip
0000
0R
elay
:
#12
345
bIub
>>tr
ip
00
000
Rel
ay :
#
1234
5cI
ub>s
tart
0000
0R
elay
:
#12
345
cIub
>tr
ip
00
000
Rel
ay :
#
1234
5cI
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>tr
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00
000
Ene
rgis
e
#123
45to
trip
1111
1L
atch
#
1234
5on
trip
0
0000
Rel
ay#1
Che
cksu
m00
0002
Set
EL
EM
EN
T2,
3,4
v
aria
bles
CO
MPE
NSA
TE
for
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CO
MPE
NSA
TE
for
bIub
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NSA
TE
for
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com
p.
vec
tor
0%
¸
0.0
°cI
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0%
¸
0.
0°C
ompe
nsat
e?
No
Unc
ompe
nsat
eN
o
Unc
ompe
nsat
eY
es
aIub
>/I
n =
N/A
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ge=
0.05
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ge=
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60.0
bIub
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n =
N/A
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ge=
0.05
-1.0
bIub
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t =
0.1
Ran
ge=
0.1-
60.0
bIub
>>
:In
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05-2
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bIub
>>
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0-60
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05-1
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:xt
= 0
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ange
=0.
1-60
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>/I
n =
N/A
Ran
ge=
0.05
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cIub
>>
:xt
= 0
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ange
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3
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3
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p
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4
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4
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p
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tory
No
5
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p
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No
5
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AC
CE
PT
key
SE
LE
CT
AC
TIO
NR
esum
eA
CC
EP
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y
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CE
PT
key
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CE
PT
key
AC
CE
PT
key
SE
LE
CT
AC
TIO
NR
esum
eA
CC
EP
Tke
y
AC
CE
PT
key
Tes
t R
elay
#1
No
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t R
elay
#2
No
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t R
elay
#3
No
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t R
elay
#4
No
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t R
elay
#5
No
Â
Â
AC
CE
PT
key
Ser
ial
Num
ber
9701
0012
Â
cIub
0
% ¸
0.
0°C
ompe
nsat
e?
Yes
ÂÂ
AC
CE
PT
key
AC
CE
PT
key
com
p.
vec
tor
0%
¸
0.0
°
Set
EL
EM
EN
T2,
3,4
var
iabl
es
AC
CE
PT
key
com
p.
vec
tor
0%
¸
0.0
°cI
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0%
¸
0.
0°C
ompe
nsat
e?
No
Unc
ompe
nsat
eN
o
Unc
ompe
nsat
eY
es
Â
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Â
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cIub
0
% ¸
0.
0°C
ompe
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e?
Yes
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AC
CE
PT
key
AC
CE
PT
key
com
p.
vec
tor
0%
¸
0.0
°
Set
EL
EM
EN
T2,
3,4
var
iabl
es
AC
CE
PT
key
SE
LE
CT
AC
TIO
NC
ance
lA
CC
EP
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yA
CC
EP
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y
com
p.
vec
tor
0%
¸
0.0
°cI
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0%
¸
0.
0°C
ompe
nsat
e?
No
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nsat
eN
o
Unc
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nsat
eY
es
Â
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0
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e?
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CE
PT
key
AC
CE
PT
key
com
p.
vec
tor
0%
¸
0.0
°
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EL
EM
EN
T2,
3,4
var
iabl
es
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CE
PT
key
Â
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CE
PT
key
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EL
EM
EN
T2,
3,4
var
iabl
es
for
5 se
cond
s