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Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
LUCY VRN6A WITH MICOM P124S RELAY TEST FORM
Substation Name
Substation Number
Voltage
Switchgear
Installed Mode Free-standing () Transformer-mounted ()
Switchboard Number Manufacturer Lucy
Serial Number Type VRN6a
Protection CTs
CT Ratio (400/1 or 800/1)
Relay
Serial Number
Shunt Trip Coil (if fitted)
24-110V DC/110-240V AC ()
Protection Settings (specified by planner/designer)
Overcurrent Settings Earth Fault Settings
Setting Current Setting Current
Curve Curve
Time Multiplier Time Multiplier
Highset Setting Current Highset (or SEF) Setting Current
Highset Time Highset (or SEF) Time
Preliminary Checks ()
Disconnect the umbilical cable from the RTU (if fitted)
Visual inspection satisfactory (no visible signs of damage etc)
Earthing satisfactory
SF6 gas pressure satisfactory
Functional/Interlock Checks ()
Open and close switches
Earth switches cannot be operated when service selected
Switch/circuit-breaker cannot be operated when earth selected
Open and close earth switches
Test access/earth star bar cannot be opened when switch/circuit-breaker in On/Off
Test access/earth star bar can be opened when earth switch closed
Switch/circuit-breaker cannot be operated when test access open
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Functional/Interlock Checks ()
Actuator operation satisfactory using an RTU simulator (LPN Remsdaq RTU only)
Transformer Winding Insulation Resistance using Test Voltage from ECS 11-0006(transformer-mounted units only)
HV windings to earth (LV windings connected together and to earth) M
LV windings to earth (HV windings connected together and to earth) M
Switchgear Continuity Test
Switch/Circuit- breaker Position Terminals Under Test Continuity
RSW1 RSW2 CB TM* FS*
TM* FS* RSW1 to RSW2 RSW1 to RSW2 to CB
Closed Closed Open Closed L1 - L1 L1 - L1 - L1
Closed Closed Open Closed L2 - L2 L2 - L2 - L2
Closed Closed Open Closed L3 - L3 L3 - L3 - L3
Closed Open Closed L1 - L2 (RSW1)
Closed Open Closed L2 - L3 (RSW1)
RSW1 RSW2 CB Terminals Under Test Continuity
Earthed
Open Open RSW1 L1 - E
L2 - E
L3 - E
Open Earthed Open RSW2 L1 - E
L2 - E
L3 - E
HV Insulation Tests using Test Voltage from ECS 11-0006
RSW1 RSW2 CB Terminal Voltage (kV)
Duration (min)
IR (M)
Under Test
Earthed
TM* FS* RSW1 RSW2 CB(FS* only)
Closed Closed Open Closed L1 L2, L3
Closed Closed Open Closed L2 L1, L3
Closed Closed Open Closed L3 L1, L2
Open Closed Open Closed L1, L2, L3
L1, L2, L3
L1, L2, L3
Closed Open Open Open L1, L2, L3
L1, L2, L3
* TM - transformer-mounted and FS - free-standing.
© UK Power Networks 2016 All rights reserved 2 of 10
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
RSW1 FPI CT Tests (test from marshalling box – refer to Figure 5 and Figure 2)
Disconnect CT wires C410/1, C430/1 and C450/1 from the left-side of the shorting block ()
Check earth continuity C510/1 - C530/1 - C550/1 - earth ()
Disconnect wire C90 ()
Measure earth insulation resistance C510/1 - C530/1 - C550/1 - earth M
Measure L1 CT loop continuity C410/1 - C510/1
Measure L2 CT loop continuity C430/1 - C530/1
Measure L3 CT loop continuity C450/1 - C550/1
Reconnect wire C90 ()
Check earth continuity C510/1 - C530/1 - C550/1 - earth ()
Reconnect CT wires C410/1, C430/1 and C450/1to left-side of shorting block ()
RSW2 FPI CT Tests (test from marshalling box – refer to Figure 5 and Figure 2)
Disconnect CT wires C410/2, C430/2 and C450/2 from the left-side of the shorting block ()
Check earth continuity C510/2 - C530/2 - C550/2 - earth ()
Disconnect wire C90 ()
Measure earth insulation resistance C510/2 - C530/2 - C550/2 - earth M
Measure L1 CT loop continuity C410/2 - C510/2
Measure L2 CT loop continuity C430/2 - C530/2
Measure L3 CT loop continuity C450/2 - C550/2
Reconnect wire C90 ()
Check earth continuity C510/2 - C530/2 - C550/2 - earth ()
Reconnect CT wires C410/2, C430/2 and C450/2to left-side of shorting block ()
© UK Power Networks 2016 All rights reserved 3 of 10
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Figure 1 – FPI CT Connections in Marshalling Box
Figure 2 – FPI CT Schematic Drawing
Refer to Appendix C for FPI schematic diagrams.
© UK Power Networks 2016 All rights reserved 4 of 10
FPI CT connections (disconnect for FPI CT tests)
C90 (disconnect for FPI CT tests)
FPI CT shorting block (CTs shorted when output wires disconnected)
FPI Connections
FPI CT common connections
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Protection CTs Insulation Resistance using 1kV Test Voltage(test from marshalling box – refer to Figure 4 and Figure 5 overleaf)
Check circuit-breaker selector switch is in the service position ()
Remove relay from the case (move nylon catch under flap to release relay) ()
Remove CT wiring earth link C70 - C90 ()
Measure the insulation resistance C70 - C90 (Earth) M
Replace CT wiring earth link C70 - C90 ()
Protection CTs Loop Continuity(from CT wiring terminal block)
Disable the automatic protection CT shorting by separating the contacts in the relay housing as shown in Figure 3
()
Measure L1 CT continuity C11 - C70
Measure L2 CT continuity C31 - C70
Measure L3 CT continuity C51 - C70
Re-enable protection CT shorting ()
Figure 3 – Disable Protection CT Shorting
Relay Case Resistance
Measure the resistance between the relay case and the switchgear earth
Insert relay back into case ()
© UK Power Networks 2016 All rights reserved 5 of 10
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Figure 4 – Marshalling Box
Figure 5 – Protection Connections in Marshalling Box
Refer to Appendix C for protection schematic diagrams.
© UK Power Networks 2016 All rights reserved 6 of 10
See below
Protection CT Test Connections
Earth link C70-C90
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Protection CT Ratio
Remove CT ratio plate from front panel ()
Select the appropriate CT ratio
CT Ratio Shorting Link Across Terminals Setting
200/1 4, 5, 6, 7 20-400A ()
600/1 1, 2, 3, 4 60-1200A ()
Test Protection Settings
Plug in relay battery box to power up relay ()
Apply the following temporary settings to the relay (refer to Appendix A for guidance) ()
Overcurrent Settings Earth Fault Settings
I> 80A200/1 0.4 In
Ie> 60A200/1 0.3 Ien
600/1 0.13 In 600/1 0.1 Ien
Delay Type IDMT Delay Type IDMT
Idmt IEC SI Idmt IEC SI
Tms 1.5 Tms 1.5
I>> No Ie>> No
I>>> No Ie>>> No
Relay Operation - Primary Injection Test
Ensure battery box is plugged into relay (this is required because some of the above settings maybe below the minimum operating current of the relay)
Increase current until ALARM is displayed on the LCD. Reset the relay and, if necessary, close the circuit breaker before each test
Overcurrent Pickup Test
RSW1 RSW2 CB Conductors Under Test
Short Conductors
I> Setting
Calculated Pickup Current (1.1 x I>)
Actual Pickup Current
RSW1 CB
Closed Open Closed L1 - L2 L1, L2, L3 80A 88A A
Closed Open Closed L2 - L3 L1, L2, L3 80A 88A A
Earth Fault Pickup Test
RSW1 RSW2 CB Conductors Under Test Ie> Setting
Calculated Pickup Current (1.1 x Ie>)
Actual Pickup Current
RSW1 CB
Closed Open Closed L1 L1 60A 66A A
Closed Open Closed L2 L2 60A 66A A
Closed Open Closed L3 L3 60A 66A A
© UK Power Networks 2016 All rights reserved 7 of 10
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
In-service Protection Settings
Apply the in-service protection settings as specified by the planner/designer to the relay and record them below (refer to Appendix A for guidance) ()
Overcurrent Settings Earth Fault Settings
CT Ratio
Primary Setting Current Primary Setting Current
I> (Yes/No) Ie> (Yes/No)
I> (Primary Setting Current ÷ CT Ratio) Ie> (Primary Setting Current ÷ CT Ratio)
IDMT Curve Type IDMT Curve Type
Tms Tms
Highset Primary Setting Highset Primary Setting
I>> (Yes/No) Ie>> (Yes/No)
I>> (Highset Primary Setting ÷ CT Ratio) Ie>> (Highset Primary Setting ÷ CT Ratio)
tI>> tIe>>
In-service Trip Settings
Apply trip settings to the relay – every element used above requires the corresponding trip command to be set to Yes (refer to Appendix A for guidance) ()
Trip tI> Trip tIe>
Trip tI>> Trip tIe>>
Table A - Calculate Injection Currents Overcurrent Setting Earth Fault Setting
Setting Current (I> or Ie>) (I>) (Ie>)
2 x Secondary Setting Current
5 x Secondary Setting Current
Highset (I>> or Ie>>) (I>>) (Ie>>)
© UK Power Networks 2016 All rights reserved 8 of 10
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Relay Operation - Secondary Injection Test
Connect timer circuit to terminals 33 (L3/3) and 35 (L5/3) in the marshalling cabinet (contact closed when CB open) ()
Overcurrent Test
SettingCalculated Injection Current(from table A)
Calculated Operating Time (from table B)
Actual Operating Times
C11 - C31 C31 - C51 C51 - C11
2x A s s s s
5x A s s s s
Highset A s s s s
Earth Fault Test
SettingCalculated Injection Current(from table A)
Calculated Operating Time (from table B)
Actual Operating Times
C11 - C72 C31 - C72 C51 - C72
2x A s s s s
5x A s s s s
Highset A s s s s
SEF* A s s s s
* The trip current may have to be increased to operate the circuit breaker if the current is below the minimum operating current.
© UK Power Networks 2016 All rights reserved 9 of 10
Table B - Calculate Operating Times Overcurrent Setting Earth Fault Setting
Curve (I>) (Ie>)
Time Setting(Tms) (Tms)
(tI>>) (tIe>>)
Tripping time at 2x secondary current
Curve SI (Tms x 10s) + 0.09s s s
Curve VI (Tms x 13.5s) + 0.09s s s
Curve EI (Tms x 26.67s) + 0.09s s s
Tripping time at 5x secondary current
Curve SI (Tms x 4.28s) + 0.09s s s
Curve VI (Tms x 3.38s) + 0.09s s s
Curve EI (Tms x 3.33s) + 0.09s s s
Tripping time at I>>, Ie>>
Overcurrent Highset tI>> + 0.09s s s
Earth Fault Highset (SEF) tIe>> + 0.09s s s
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Shunt Trip and Emergency Trip (if fitted)
Check correct shunt trip coil voltage is selected ()
Test Coil Marshalling Box Terminals
Test Voltage CB Trips
Apply 70% (dc) or 85% (ac) of coil rated voltage
24-110V DC/110-240V AC 41 - 42 V ()
Apply 110% of coil rated voltage 24-110V DC/110-240V AC 41 - 42 V ()
Check emergency trip button operates circuit-breaker ()
Final Checks ()
Check correct protection settings applied
Check relay reset
Remove battery box from relay
Ensure FPI CT shorting-link(s) are replaced if CTs are not used or not connected to FPI or RTU
Reconnect umbilical cable to RTU (if fitted)
Asset data form completed
Test Equipment
Make/Type Serial Number Calibration Date
Certification ()
All tests have been completed satisfactorily
Comments
Commissioning Engineer Signature Date
The completed test form shall be left on-site in a plastic wallet and in secure location. A copy of the completed test shall be sent to the relevant ART mailbox.
© UK Power Networks 2016 All rights reserved 10 of 10
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Appendix A – MiCOM P124S
A.1 Introduction
The MiCOM P124S is a self powered three phase overcurrent and earth fault protection relay. Settings are applied and fault reports read using the LCD display and the control buttons on the front panel (see section A.3).
A battery box is available to power the relay during commissioning. The battery box is plugged into the serial port under the lower panel on the front of the relay (section A.4).
Note: The minimum operating current of the relay is 20% of the CT primary current. The operating time of the VRN6a circuit breaker is 80 to 100ms.
A.2 Programming
The keypad has seven keys divided into two groups:
The and keys situated immediately under the screen are dedicated to reading and acknowledging alarms.
The other five keys situated below these are used for programming the relay and navigating the menu system (a map of the menu system is shown in section A.5). The
directional keys either move through the various levels of the menu or are used to change settings. The key validates a choice or applied value. The general
menu navigation is left and right to scroll through the main menu headings. Pressing down will enter the menu selected and allow you to scroll through the various options.
For example, applying the following typical settings to a MiCOM P124S relay used with 200/1 CTs:
Protection Function Protection Setting Relay Equivalent Setting
OC 200A VI 0.1TM 1 In
OCHS 1200A 6 In
EF 100A SI 0.1TM 0.5 Ien
SEF 32A DT 3s 0.16 Ien
Note: Various settings, such as the selection of the various thresholds, time delays, trip settings etc are password protected and when accessing these menus a password entry is required. By default this is set to AAAA and will already be entered when the password prompt appears on the LCD. To proceed past this screen press the key.
First the CT ratio must be set in the relay:
From the default current display press down to display the main menu, OP PARAMETERS will be displayed on the LCD.
Press right to navigate to the CONFIGURATION menu. Press down to display the CT Ratio.
© UK Power Networks 2016 All rights reserved 1
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Press down to Line CT primary, then to edit the value, a blinking cursor should appear.
Press left or right to select the digit to change and up or down to alter the digit selected.
Confirm the new entry with the key - the new Line CT primary value should be displayed. For 200/1 CTs this should be set to 200.
Press down again to E/Gnd CT primary and set this to 200 also. The CT ratios have now been set, press up to return to the CONFIGURATION main
menu.
Next apply the relay settings as below:
Use right to navigate to the PROTECTION menu. Press down to display [50/51] Phase OC. Press down to the overcurrent selection I> ? screen. Press to edit and up or down to change to Yes, confirm by pressing
again. Press down to I> and edit to set the current as a proportion of the CT primary, for a
200/1 CTs with a 200A setting this should be set to 1 In. Press down to display the Delay Type - set to IDMT. Press down again to display Idmt - set to IEC VI. Press down again to display Tms - set to 0.1. Press down again to display I>> ? - set to Yes. Press down again to display I>> - set to 6. Press down again to display Delay Type - set to DMT. Press down again to display tI>> - set to 0s. Press down again to display I>>> ? - set to No (unless additional overcurrent
settings sre required). Press up to return to the [50/51] Phase OC menu. The earth fault settings can be set using the same method but applied to the [50N/51N]
E/Gnd menu under PROTECTION. As a setting of 100A is required, this should be applied by setting Ie> to 0.5 Ien. Press down to display the Delay Type - set to IDMT. Press down again to display Idmt - set to IEC SI. Press down again to display Tms - set to 0.1. Press down again to display Ie>> ? - set to Yes. Press down again to display Ie>> - set to 0.16. Press down again to display Delay Type - set to DMT. Press down again to display tIe>> - set to 3s. If further earth fault settings are required they should be implemented using the Ie>> and
Ie>>> menus. If not required, ensure these are not enabled by setting them to No. The protection settings have now been entered, press up to return to the
PROTECTION main menu.
Finally, the relay must be set to ensure that it will trip for the settings selected:
Navigate to the AUTOMAT. CTRL main menu and press down to Trip Commands. Press down to navigate through the various settings to trip on. With the example settings set Trip tI> to Yes, Trip tI>> to Yes, Trip tIe> to Yes and set
Trip tIe>> to Yes. All other trips should be set to No.
The required relay settings have now been applied.
© UK Power Networks 2016 All rights reserved 2
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
A.3 Front Panel
A.4 Battery Box (material code 13945R)
© UK Power Networks 2016 All rights reserved 3
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
A.5 Menu Structure
© UK Power Networks 2016 All rights reserved 4
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Appendix B – MiCOM P124S – Disable Relay Tripping Function
© UK Power Networks 2016 All rights reserved 1
To d
isab
le
rela
y se
t all
trip
s to
'No'
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Appendix C – VRN6a Schematic Diagrams
THM 0004977 – MiCOM P124S
THM 0008215 – Nortroll CableTroll 2350 Switch 1
THM 0008244 – Nortroll CableTroll 2350 Switch 2
Note: A full set of Lucy SABRE A drawings are contained in ECP 11-0511z Lucy SABRE A Schematic Drawings.pdf.
© UK Power Networks 2016 All rights reserved 1
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
© UK Power Networks 2016 All rights reserved 2
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
© UK Power Networks 2016 All rights reserved 3
Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
© UK Power Networks 2016 All rights reserved 4