DEWA Power Transformer Site Test Report Format
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Transcript of DEWA Power Transformer Site Test Report Format
MD(Trafo)/ST/02 Page of
GENERAL DATA HV LV RATING – ONAN / ONAF MVA
NOMINAL VOLTAGE kV
FULL LOAD CURRENT (RATED TAP) A
VECTOR GROUP
SHORT CIRCUIT IMPEDANCE HV/LV % Max. Tap ( 1 )
Rated Tap ( ) Min. Tap ( )
TYPE/FORM (given by manufacturer)
YEAR OF MANUFACTURE
ZERO SEQUENCE IMPEDANCE
NO OF TAPS
NO OF FANS
NO OF PUMPS
NO OF RADIATORS
TYPE OF OIL
TOTAL OIL QUANTITY
BREATHER TYPE
OLTC MAKE / MOTOR
OLTC TYPE / MOTOR
TOTAL WEIGHT
CONSERVATOR TYPE
NEUTRAL GROUNDING METHOD
TRAFO TYPE (ICT, IBT, IDT Etc.)
SUB STATION VOLTAGE
COMMISSIONING DATE OF S/S
COMMISSIONING DATE OF TRAFO.
TYPE OF INSULATION PAPER NORMAL / THERMALLY UPGRADED
DATA ENTERED CHECKED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
DEWA
MD(Trafo)/ST/03 Page of
Contract No.
Sub Station
:
:
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No. FINAL CHECKS
Correctness of oil level in all bushings and oil filled chambers.
All air release plugs (including radiators)& Buchholz relays vented
Pressure relief diaphragm intact
All bushing connections checked
Neutral & Transformer Earth connection satisfactory
Position of all switches in MK & MDU – ON position.
All CT connections are through / shorted
WTI Ammeter circuit link connections are correct
CT test windings open
No damage for insulators and clean
No oil leakage
Rating, diagram, Id plates fitted satisfactorily
Dehydrating breathers satisfactory and pipe work joint is tight
All cabling and wiring visually satisfactory
All valves are in correct operational position with respect to valve schedule diagram (Ensure valves on both sides of relays and to HV cable box are open).
All valves labeled & locked and blanking covers provided wherever necessary
All protective and cable box covers fitted.
All pre-commissioning tests (including oil tests) completed & results are satisfactory. Copies of test reports available.
Condition of Gland earthing of all cables in MK & MDU
Permanent Identification tags for all control cables on both ends
Availability on marked up drawing copy MK & MDU
Close all opening (center cable) in to AVR panel
MK and HV/LV cable box.
CHECKED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/16 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
INSULATION RESISTANCE CHECK OF DEVICES / CONTACTS Sl. No. Device/Component
Test voltage
Ambient Temp.
Terminals numbers in MK
IR value (M. Ohms)
Remarks
1 HV bushing – test tap N/A 2 HV-N bushing – test tap N/A 3 Buchholz relay 4 Oil level gauge (MT) 5 Oil level gauge (OLTC) 6 Rubber bag failure relay 7 PRD (MT) 8 PRD (OLTC) 9 OLTC surge relay 10 OTI 11 WTI - HV 12 WTI - LV 13 Heater – HV cable box 14 Heater – LV cable box 15 Heater – Marsh. kiosk 16 Heater - MDU 17 18 19 20
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/23 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
OIL LEAK TEST OF TRANSFORMER
Hourly Reading/ details:
Date Time Ambient Temp. ( °C)
Tr. OTI reading
(°C)
Pressure at Top (Bar)
Pressure at Transformer Bottom (Bar)
Result / observation Remarks
----- Before the application of Pressure
Pressure gauges- Make & Serial no.
Top Bottom
Calibration due date TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/15 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
TAP POSITION INDICATION CHECK:
Tap Positi
on MDU
Input to Transducer
Transducer output for
TPI (mA) at AVR panel
Transducer (SCADA)
Output (mA)
Tap Position at AVR Panel
Tap Position at DCS
Tap Position
at SCADA
Remarks
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Instrument Name, Make & Serial no.
Calibration due date TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/26 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
TEST ON TRANSFORMER OIL AFTER COMPLETE SITE PROCESSING
Sl. No. Property Unit Requirement as per Spec.
Test Result Remarks
1 Breakdown Voltage 2 Water Content 3 Dissipation Factor at 900C. 4 Resistivity at 900C. 5 Neutralization Value 6 Interfacial Tension 7 Oxidation Stability 8 Flash Point 9 Inhibiter Content 10 Corrosive Sulphur Content (Test certificate from independent test laboratory is attached)
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/25 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
TEST RESULTS / PROPERTIES OF INSULATING OIL BEFORE FILLING IN THE
TRANSFORMER
Property Unit Test Results Remarks Kinetic viscosity at 400C – 150C mm2 / S Flash Point 0C Pour Point 0C Appearance
Density at 200C kg/dm2 Interfacial tension at 250C N/m Neutralization Value mg KOH/g Corrosive Sulphur Water Content mg/kg
Antioxidant additives DBPC
Wt %
Oxidation stability Induction period
h
Breakdown Voltage
kV
Dissipation factor at 900C and 40 Hz to 60 Hz
(Copy of Test certificate from oil manufacturer is attached)
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/11 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
CALIBRATION OF OIL & WINDING TEMPERATURE INDICATORS
1. OIL TEMPERATURE INDICATOR
MAKE: TYPE: SERIAL NO. BATH TEMPERATURE (0C)
INDICATOR READING (0C)
ALARM CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
TRIP CONTACT SETTING (0C) OPERATION OF CONTACTS (0C) Remarks: -
2. WINDING TEMPERATURE INDICATOR (HV)
MAKE: TYPE: SERIAL NO.
BATH TEMPERATURE (0C)
INDICATIOR READING ( 0C)
ALARM CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
TRIP CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
Remarks: -
3. WINDING TEMPERATURE INDICATOR (LV)
MAKE: TYPE: SERIAL NO.
TEST TEMPERATURE (0C)
INDICATIOR READING (0C)
ALARM CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
TRIP CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
Remarks: - Make and Sl.No. of Temp. Bath Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/09 Page of
MEASUREMENT OF TAN DELTA & CAPACITANCE
Ambient temp. - Top oil temp. -
a) Transformer Winding:
CAPACITANCE (pF) Sl. No.
APPLIED VOLTAGE
(kV) Measured combination
Measured Value
Factory Value
Difference (%)
CURRENT (mA)
Dissipation Factor
(TAN DELTA) (%)
1
2
3
4
5
6
b) BUSHINGS
Make and Type of bushings:
CAPACITANCE (pF) Sl. No.
Applied voltage
(kV)
Measured on ( Sl. No. of bushings) Measured
value Factory
value Difference (%)
Current (mA)
Dissipation Factor
(tan delta) (%)
1 HV/LV (U)–
2 HV/LV (V)–
3 HV/LV (W)–
4 HV/LV (N)–
Instrument Name, Make & Serial no.
Calibration due date TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
DEWA
MD(Trafo)/ST/18 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
COOLING EQUIPMENT
A) OPERATION / CONTROLS CHECK
MANUAL OPERATION
DIRECTION OF FANS / PUMPS
AUTO CONTROL FROM HV W. T. I
AUTO CONTROL FROM LV W. T. I
AUTO CONTROL FROM O T. I
CHECK INTERLOCKING OF COOLING FANS WITH FPS OPERATION
UNDER VOLTAGE RELAY OPERATION AND ALARM CONTACT
MAIN CONTROL MCB TRIP
FAN CONTROL SWITCH TRIP
PUMP / FAN ‘ON’ INDICATION
PUMP / FAN FAILURE INDICATIONS
OPERATION OF BUCHHOLZ RELAY WHEN SIMULTANEOUS SWITCHING OF PUMPS
CHECK FOR STAGGERED STARTING OF COOLER FANS/PUMPS
WIRING – CHECKS ( T. B NO, FERRULES, GROUPING OF ALARM CONTACTS ETC. AS PER DRAWINGS)
GROUP – 1 (START) - 0 C GROUP – 1 ( STOP ) - 0 C
GROUP – 2 (START) - 0 C GROUP – 2 ( STOP ) - 0 C
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/14 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
ON LOAD TAP CHANGER – OPERATION CHECKS
Tap changer details Tap Changer Motor Make - Make - Type/Model - Motor Type - Sl. No. - Rating (KW) - MDU Type - Voltage - Year of Mfg. - Rated current - Sl.No. Description of check Remarks
1 Local operation possible when selector s/w in local position 2 Remote operation not possible when selector s/w in local position 3 Emergency switch operation 4 Handle interlock 5 End limit switches in extreme taps 6 Step by step operation 7 Position indication in MDU 8 Position indication RCP 9 No of rotations for one step operation 10 Local operation is not possible when selector s/w in Remote position 11 Remote operation is possible when selector s/w in Remote position 12 Over travel in operation is within limits 13 Starting current of motor 14 Running current of motor 15 Phase discrepancy in operation (if separate poles for each phases) 16 Time for one tap changing – Normal tap 17 Time for one tap changing – run through tap (where applicable) 18 Contacts for all alarm/indication circuits 19 Over load tripping of motor (Setting of MPR) 20 IR value of motor and wiring with 500volts Megger 21 Lighting and heater controls (operation of door switch, thermostat etc.) 22 23 24 25
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/06 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
MAGNETIZING CURRENT MEASUREMENT HV Winding
Measured exciting current (mA) Tap No. Applied voltage U phase V phase W phase Remarks
LV Winding
Measured exciting current (mA) Applied voltage U phase V phase W phase
Remarks
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/17 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
FAN MOTOR CHECK
Make Rating KW/HP
Type / Model
Rated current
FAN NO.
SERIAL NO.
CHECK for DIRECTION OF ROTATION
STARTING CURRENT (A)
U phase
RUNNING CURRENT V phase
(Amps) W phase
OVER LOAD SETTING (Amps)
TRIP OPERATION TIME (Sec)
BLOCKED ROTOR CURRENT (Amps)
OV
ER
LO
AD
DE
VIC
E
ALARM CONTACT (OK/Not OK)
IR VALUE AT 500 V (M Ohms)
CHECK FAN RUNNING STARTS WHEN ONE PHASE IS DISCONNECTED – RUNNING / NOT RUNNING CHECK FOR HEATING AND LIGHTING CONTROLS (DOOR S/W, THERMOSTAT ETC.) -
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/07 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
HV WINDING RESISTANCE MEASUREMENT (Temp ° C)
Measured Resistance (Ohms) Tap No.
Applied current
U - N V - N W - N Average Resistance corrected to 75°C
( R ) ∆R
Factory value at
75°C
Remarks
Note : Graph plotted ( Tap no on x-axis and ∆R on y-axis) for all the three phases to be attached)
(Temp °C)
TAP No
U – V (Ohms)
V - W (Ohms)
W – U (Ohms)
Average (Ohms)
LV WINDING RESISTANCE MEASUREMENT (Temp °C)
TAP No.
u – v / u - n (Ohms)
v – w / v - n (Ohms)
w – u / w - n (Ohms)
Average (Ohms) Factory value (Ohms)
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/01 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
INDEX
Sl.No. Item Page No.
1 Transformer general data 2 Final checks (To be carried out prior to energisation) 3 Insulation Resistance measurement of Transformer (Winding and core) 4 2kV test on core and clamping structure 5 Ratio and Vector group tests 6 Magnetizing current measurement 7 Winding Resistance measurement 8 Short circuit Impedance measurement 9 Measurement of Tan delta and Capacitance 10 Frequency Response analysis 11 Calibration of Temp. Indicators 12 Gradient check of Winding Temperature indicators 13 Measurement of transducer for Remote Temp. Indicator 14 Operation check of On load Tap changers 15 Tap position indication check 16 Insulation resistance check of devices 17 Fan motor check 18 Operation check of cooling equipments 19 Protective device wiring check 20 Checks on AVR 21 Tap changer and cooler alarms check 22 Parallel operation checks 23 Oil leak test 24 BDV test on insulating oil 25 Tests on insulating oil (oil characteristics) 26 Tests on transformer oil after complete processing 27 DGA test on insulating oil
PREPARED CHECKED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/04 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
INSULATION RESISTANCE MEASUREMENT & CORE INSULATION TEST INSULATION RESISTANCE - WINDING
Measured at 5000 Volts Top Oil temperature - °C
Measured between 15 Seconds
(M. Ohms)
60 Seconds
(M. Ohms)
600 Seconds (M. Ohms)
P.I. value
(R600/R60)
HV - LV and EARTH
LV - HV and EARTH
HV – LV
Remarks:-
CORE INSULATION TEST INSULATION RESISTANCE -
Measured at 2000 volts Oil Temperature - °C
Measured between Before 2kv Test (M.ohms)
After 2kv Test (M.ohms) Remarks
Core - Earth
Clamps - Earth
Core - clamps
Remarks: -
HV TEST(2kV Test) on Core insulation 1. Applied 2kV, AC, between core & clamps connected together and tank for one minute
Leakage current - mA Result : Withstood / Failed
2. Applied 2kV, AC, between core and core clamps for one minute Leakage current - mA Result : Withstood / Failed
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/12 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
GRADIENT CHECK OF WINDING TEMPERATURE INDICATORS
Indicator Sl.No. Bath Temp.
( °C)
Current injected (Amps)
Indicator Reading
(°C)
Gradient (°C)
Required gradient
(°C) Remarks
GRADIENT CHECK OF REMOTE WINDING TEMPERATURE INDICATORS
Indicator Sl.No.
Bath Temp. (°C)
RWTI output (mA)
Current injected (Amps)
Local WTIReading
(°C)
Output (mA)
Gradient (mA)
Required gradient
(mA) Remarks
Instrument Name, Make & Serial No. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/13 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
TEMPERATURE TRANSDUCER OUTPUT MEASUREMENT
DETAILS OF DEVICES
ROTI :
RWTI (HV) :
RWTI (LV) :
Device connected to DCS/SCADA -
OTI WTI (HV) WTI (LV) Reading at Bath temp. (°C) OTI
reading Transducer output (mA)
WTI reading
Transducer output (mA)
WTI reading
Transducer output (mA) DCS SCADA
Remarks
40 50 60 70 80 90 100 110 120 130 140 150
Instrument Name, Make & Serial No. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/08 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
SHORT CIRCUIT IMPEDANCE MEASUREMENT
Measured voltage on HV (volts)
Measured HV current (Amps)
Impedance (%) at ……. MVA base Tap
No. U - V V -W W -U U V W U V W Average
Factory value
Impedance (%) = *Rated current x Measured voltage x 100 *Rated voltage x Measured current (* At corresponding tap)
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/05 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
RATIO AND VECTOR GROUP TESTS
HV volts LV volts Tap No. U-N V-N W-N u-v/u-n v-w/v-n w-u/w-n
Measured ratio
(Average)
Nominal ratio
Error(%) Remarks
Voltage continuity check during tap changing operations - OK / Not OK VECTOR GROUP CHECK
Connected terminals ‘U& u’ of transformer together, Tap changer being on rated tap. Applied 3-phase voltage on HV terminals.
Vector Diagram Measured voltages on
U-V V - v V - w V-W W - w W - v W-V U - n N - n Remarks :-
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/19 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
PROTECTIVE DEVICES WIRING CHECK
Sl. No.
Description Initiated from
Terminal No. in MK
Terminal No. in LCC
Terminal No. in RCP/ RPs
Remarks/ Results SCS/Scada
Transformer Alarms 1 Buchholz Alarm 2 Oil temp. high 3 Wind. Temp. high( HV) 4 Wind. Temp. high (LV) 5 Rubber bag fail 6 Oil level high (MT) 7 Oil level low (MT) 8 Oil level high (OLTC) 9 Oil level low (OLTC)
Transformer Trips 1 Buchholz relay 2 Oil temp. high 3 Wind. Temp. high 4 PRD (MT) 5 PRD (OLTC) 6 Surge Relay (OLTC) 7 Pressure relay OLTC 8 PRD cable box
Buchholz Relay alarm contact operation check by N2 injection – Remarks: Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/24 Page of Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT
Trafo ID
Contractor Manufacturer Date of test Sl. No.
BDV TEST ON INSULATING OIL :
Sl. No. Test no. Breakdown voltage
(in kV) Remarks
Sampling done from : 1 Test no: 1 2 Test no: 2 3 Test no: 3 4 Test no: 4 5 Test no: 5 6 Test no: 6
Average Sampling done from :
1 Test no: 1 2 Test no: 2 3 Test no: 3 4 Test no: 4 5 Test no: 5 6 Test no: 6
Average Sampling done from :
1 Test no: 1 2 Test no: 2 3 Test no: 3 4 Test no: 4 5 Test no: 5 6 Test no: 6
Average
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/22 Page of Page 1of 2 of MD(Trafo)/ST/22
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
OLTC PARALLEL OPERATION CHECKS
A. PARALLEL MANUAL MODE
RESULT / REMARKS MASTER/ FOLLOWER/ INDEPENDENT
SWITCH SELECTIONS OLTC OPERATION
Operated from Sl.No.
MDU AVR TR - 1
TR - 2
TR - 3 TR – 1 TR – 2 TR – 3 AVR
panel DCS SCADA
1 R H R M F F OPERATE AS MASTER
OPERATE AS FOLLOWER
OPERATE AS FOLLOWER
2 R H R F M F OPERATE AS FOLLOWER
OPERATE AS MASTER
OPERATE AS FOLLOWER
3 R H R F F M OPERATE AS FOLLOWER
OPERATE AS FOLLOWER
OPERATE AS MASTER
4 R H R M F I OPERATE AS MASTER
OPERATE AS FOLLOWER
OPERATE AS INDEPENDENT
5 R H R M I F OPERATE AS MASTER
OPERATE AS INDEPENDENT
OPERATE AS FOLLOWER
6 R H R I M F OPERATE AS INDEPENDENT
OPERATE AS MASTER
OPERATE AS FOLLOWER
7 R H R M M M NO OPERATION IS POSSIBLE
8 R H R F F F NO OPERATION IS POSSIBLE
9 R H R I I I OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
10 R H R M I I OPERATE AS MASTER
OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
11 R H R I M I OPERATE AS INDEPENDENT
OPERATE AS MASTER
OPERATE AS INDEPENDENT
12 R H R I I M OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
OPERATE AS MASTER
M – Master F – Follower I – Independent R – Remote A - Auto H – Hand (manual) Contd. on Page 2of 2 of MD(Trafo)/ST/22
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/20 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT
Trafo ID
Contractor Manufacturer Date of test Sl. No.
AUTOMATIC VOLTAGE REGULATOR (AVR) CHECK
Make: Sl.No. Control voltage: PT sec. voltage: Band width setting: % ( volts) Under voltage blocking: % Over voltage blocking: % Check Points
Sl.No. Status description Check point Result Remarks
1 Operation 1.1 No manual operation possible from MDU, SCC
and AVR
1.2 AVR in ‘Auto’ mode Auto operations with the variations in PT sec. voltage. Tap Raise command when PT sec. voltage reduced and vice versa
1.3 Auto operations not possible Manual operations possible from AVR 1.4 AVR in manual mode Manual operations possible from SCC
1.5 Operation possible from MDU 1.6 MDU in local position Operation not possible from AVR & SCC 1.7 Operation not possible from MDU&SCC 1.8
MDU & AVR in ‘remote’ position Operation possible from AVR
1.9 Operations not possible from MDU & AVR 1.10
MDU in remote & AVR in Supervisory Operation possible from SCC only
1.11 Under voltage blocking No operations possible 1.12 Over voltage blocking No operations possible
2 AVR Display 2.1 Voltage 2.2 Current 2.3 Tap No 2.4 Frequency 2.5 Master/Follower/Independent mode 2.6 Paragramar functions (Breaker status indication) 2.7 2.8 2.9
2.10
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/21 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
TAP CHANGER & COOLER ALARMS & INDICATIONS CHECK
Sl.No. Alarm description Initiated at DCS SCADA Remarks
1. ALARMS
1.1 TC out of step 1.2 TC incomplete 1.3 TC motor supply faulty 1.4 TC control supply faulty 1.5 AVR faulty 1.6 VT supply fail 1.7 Cooling equipment Faulty 1.8 IDT/ET –
MK/MDU heating/lighting supply faulty
2. INDICATIONS
2.1 Tap Changer in ‘Remote’ 2.2 Tap Changer in ‘Supervisory’ 2.3 Tap Changer in ‘Auto’ 2.4 Tap Changer in ‘Manual’ 2.5 TC in progress 2.6 TC in ‘Independent’ mode 2.7 TC in ‘Master/follower’ mode 2.8 Tap position indications 2.9 Cooling fans running
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/28 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/27 Page of
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
DGA TEST ON TRANSFORMER OIL
Date of Sampling : Oil Temperature :
Sampled by : Sampling Point :
Sample identification :
Tests carried out by :
Test report reference :
Test Results
Sl.No. Dissolved gas Concentration (ppm) Remarks
1 Hydrogen (H2)
2 Methane (CH4)
3 Ethane (C2H6)
4 Ethylene (C2H4)
5 Acetylene (C2H2)
6 Carbon Monoxide (CO)
7 Carbon Dioxide (CO2)
8 Oxygen (O2)
9 Nitrogen (N2)
10
11
12 TDCG (ppm / %)
13 CO2 / CO
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
DEWA
MD(Trafo)/ST/10 Page of
FREQUENCY RESPONSE ANALYSIS
Test report - Enclosed / Not enclosed
Report No -
Number of pages -
Instrument Name, Make & Serial no. Calibration due date
TESTED WITNESSED APPROVED
Signature: Signature: Signature:
Name: Designation: Dept./Company:
Name: Designation: Dept.& section:
Name: Designation: Dept.& section:
Contract No. : Sub Station :
TRANSFORMER SITE TEST REPORT Trafo ID
Contractor Manufacturer Date of test Sl. No.
DEWA