INSULATION TESTS TWO-WINDING TRANSFORMERS

1 93000, REVISED 12/3/2007 COPYRIGHT 2002-2014 POWERDB, BY:TEST EQUIPMENT USED:Default AdministratorINSULATION TESTSTWO-WINDING TRANSFORMERS1 POWER FACTOR10/13/2014 POWER FACTOR TESTSPLANTDOBLE FExample PlantExample OwnerOWNER%ASSET IDHUMIDITYAMBIENT #DATEPAGEPOSITIONSUBSTATIONTRANSFORMERAG ETYPE/CLASSMFR kVASERIAL NO. FREE BREATHINGWEATHERDATE LAST TESTSEALEDGAS BLANKETEDTOP OIL SHEET TYPEDWG. CAT. TESTSBUSHING TESTSWINDING ENERGIZEDHIGHHIGH LOWLOWTEST CONNECTIONS TEST1234 WINDING GROUNDEDLOWHIGH WINDING GUARDEDLOWHIGH TEST kVMILLIVOLTAMPERESMILLIWATTSmW MULTI- PLIERMETER READINGmVAMULTI- PLIERMETER READING % POWER FACTORMEASUREDCOR.

2 20 C EQUIVALENT kV READINGSCALCULATED RESULTS INSULA- TION RATING KEY TO INSULATION RATINGLOW SIDE kVHIGH SIDE kVCOPIES TOASKARELAIRGASOILMETER READINGMULTI- PLIERmVAMETER READINGMULTI- PLIERmW TEST kVMILLIVOLTAMPERESMILLIWATTS EQUIVALENT kV READINGS23467591081213111 NHIGH SIDELOW SIDE BUSHING SERIAL NO. P H A S E BUSH NO. NMEASUREDCOR. 20 CTOPINSULA- TION RATING COLLAR TESTS (mW/mVA)% POWER FACTOR OIL SAMPLEOIL TEMP. C N G = GOOD D = DETERIORATED I = INVESTIGATE B = BAD (REMOVE OR RECONDITION) 14 15 16 17 18 19 OF OILGALLONSCOMMENTS:DEFICIENCIES:91000, REVISED 11/30/2007 COPYRIGHT 2002-2014 POWERDB, BY:TEST EQUIPMENT USED:Default AdministratorINSULATION TESTSMISCELLANEOUS EQUIPMENT2 POWER FACTOR10/13/2014 POWER FACTOR TESTSPLANTDOBLE FExample PlantExample OwnerOWNER%ASSET IDHUMIDITYAMBIENT #DATEPAGEPOSITIONSUBSTATIONEQUIPMENT TESTEDCOPIES TODATE LAST TESTLAST TEST SHEET NO.

3 LINE NO. SERIAL NO. TEST klVEQUIVALENT kV READINGSMILLIVOLTAMPERESMILLIWATTSMETER READINGMULTI- PLIERmVAMULTI- PLIERmW METER READING% POWER FACTOR MEASUREDCOR. 20 C INSULA- TION RATING 1234598710611131415161718192012212324252 627282922 KEY TO INSULATION RATINGG = GOODD = DETERIORATEDI = INVESTIGATEB = BAD (REMOVE OR RECONDITION)WG = GOODWD = DETERIORATEDWI = INVESTIGATEWB = BAD (REMOVE OR RECONDITION)XI = INVESTIGATEXD = DETERIORATEDXG = GOODXB = BAD (REMOVE OR RECONDITION)WINDINGSBUSHINGS - INSULATORS - MEMBERS - OIL - :DEFICIENCIES: INSULATION TESTSCABLES AND POTHEADS3 POWER FACTOR10/13/2014 POWER FACTOR TESTSPLANTDOBLE FExample PlantExample OwnerOWNER%ASSET IDHUMIDITYAMBIENT #DATEPAGEPOSITIONSUBSTATION96000, REVISED 11/30/2007 COPYRIGHT 2002-2014 POWERDB, BY:TEST EQUIPMENT USED:Default AdministratorCIRCUITDEPTHDUCT TODATE LAST TESTLAST TEST SHEET READINGMULTI- PLIERmVAMETER READINGMULTI- PLIERmW TEST kVMILLIVOLTAMPERESMILLIWATTS EQUIVALENT kV READINGS P H A S E234675910812131114115 LINE NO.

4 NIDENTIFICATION NN INSULA- TION RATING POTHEAD INSULA- TION RATING CABLE% POWER FACTOR D. C. MEGOHMS LOCATION TOP POTHEAD HOT-COLLAR TESTS mW / mVAG = GOODD = DETERIORATEDI = INVESTIGATEB = BAD (REMOVE OR RECONDITION)KEY TO INSULATIN RATING TYPE: DRY, OIL-FILLED, OIL RESERVOIR, GAS RESERVOIRMFR. AND TYPELOCATIONIDENTIFICATIONRATED kVOPER kVAMPS. (LOAD)LENGTH - OUTDOORLENGTH - INDOORAGENO. AWG, MCWINSULATION MATERIALINSULATION THICKNESSINSULATION TYPE BELTED, SHIELDEDJACKET LEAD, ARMOR, BRAIDDUCT TRAY METALLIC, NONMETALICCABLEMFR. AND TYPELOCATIONIDENTIFICATIONRATED kVOPER kVAMPS. (RATED)OUTDOOR - INDOORAGETYPE: DRY, CPD-FILLED, OIL-FILLEDNO.

5 AWG, MCMPORCELAIN SINGLE MULTIPIECETERM. TYPE CAP NUT, SOLDER SEALEDAERIAL CONN. RIGID, FLEXIBLEJOINTS INSULATED, WIPED, COMPRESSEDPOTHEADCOMMENTS:DEFICIENCIES: INSULATION TESTTHREE-WINDING TRANSFORMER4 POWER FACTOR10/13/2014 POWER FACTOR TESTSPLANTDOBLE FExample PlantExample OwnerOWNER%ASSET IDHUMIDITYAMBIENT #DATEPAGEPOSITIONSUBSTATION94000, REVISED 5/8/2008 COPYRIGHT 2002-2014 POWERDB, BY:TEST EQUIPMENT USED:Default Administrator METER READINGMULTI- PLIERmVAMETER READINGMULTI- PLIERmWMEASUREDCOR. 20 C TEST kVMILLIVOLTAMPERESMILLIWATTSINSULA- TION RATING EQUIVALENT kV READINGS% POWER FACTOR G = GOOD D = DETERIORATEDI = INVESTIGATE B = BAD (REMOVE OR RECONDITION)KEY TO INSULATION RATINGWINDING ENERGIZEDWINDING GROUNDEDWINDING GUARDEDTEST AND AND LAST TESTAGECOPIES TOGAS BLANKETEDCONSERVATORSEALEDLAST SHEET BREATHINGYEARkVCAT.

6 OIL ALLHIGH AND TESTSHOULD EQUAL CH = CL = OVER-ALL TESTS7 TERT.(C HLC(TEST 1 MINUS TEST 2)LTC(TEST 3 MINUS TEST 4)HTC(TEST 5 MINUS TEST 6)CALCULATED RESULTSMETER READINGMULTI- PLIERmVAMETER READINGMULTI- PLIERmW TEST kVMILLIVOLTAMPERESMILLIWATTS EQUIVALENT kV READINGS2346759108121311141 NHIGH SIDELOW SIDE BUSHING SERIAL NO. P H A S E BUSH NO. NMEASUREDCOR. 20 CTOPINSULA- TION RATING COLLAR TESTS (mW/mVA)% POWER FACTOR OIL SAMPLEOIL TEMP. C TERTIARYN)N = NEUTRALBUSHING TESTSLOW SIDE kVHIGH SIDE kVOILASKARELAIRGASOF OILGALLONSCOMMENTS:DEFICIENCIES:92000, REVISED 11/30/2007 COPYRIGHT 2002-2014 POWERDB, BY:TEST EQUIPMENT USED:Default AdministratorINSULATION TESTSCIRCUIT BREAKERS5 POWER FACTOR10/13/2014 POWER FACTOR TESTSPLANTDOBLE FExample PlantExample OwnerOWNER%ASSET IDHUMIDITYAMBIENT #DATEPAGEPOSITIONSUBSTATIONCIRCUIT BREAKERBREAKER SERIAL LAST TOTYPEkVBUSHING (TYPE - FORM - DWG.)

7 NO.)OIL TEMP. BUSH SERIAL NO. SIDE PHASE INS. IN PAR'LL123 CIRCUIT BREAKER OPEN564 TANK 2 TANK 3 TANK CLOSEDEQUIVALENT kV READINGSMILLIVOLTAMPERESMETER READINGMULTI- PLIERmVAmW MULTI- PLIERMILLIWATTSMETER READINGMEASUREDCOR. 20 C% POWER FACTORINSULA- TION RATING COLLAR TESTS mW / mVA LINE TESTS23456789101112131415161 G = GOODD = DETERIORATEDI = INVESTIGATEWG = GOODWD = DETERIORATEDWI = INVESTIGATEXI = INVESTIGATEXD = DETERIORATEDXG = GOODBUSHINGS - INSULATORS - TO INSULATION RATINGWINDINGSWB = BAD (REMOVE OR RECONDITION)WOOD MEMBERS - OIL - = BAD (REMOVE OR RECONDITION)XB = BAD (REMOVE OR RECONDITION) DATE LAST TESTLAST TEST SHEET BUSFEETCOMMENTS:DEFICIENCIES:HTHREE - PHASE WYEH3HH( or H )H( or H )90000, REVISED 2/15/2006 COPYRIGHT 2002-2014 POWERDB, BY:TEST EQUIPMENT USED.

8 Default Administrator234567891011121314151617181 9202123242526272822 SINGLE PHASEENERGIZEUSTH1H20210 ENERGIZETHREE - PHASE DELTA1H2H3(1)USTH2H3 GROUNDHHH121 BCPHASEA(1)EXCITATION - CURRENT TEST6 POWER FACTOR10/13/2014 POWER FACTOR TESTSPLANTDOBLE FExample PlantExample OwnerOWNER% ASSET IDHUMIDITYAMBIENT #DATEPAGEPOSITIONSUBSTATIONHH321 ENERGIZEHHUSTH000 BCPHASEAHBTHREE - PHASE WYEHHHENERGIZE213 USTPHASEACHH000 XXX000 MANUFACTURERSERIAL POSITION (CHECK) : 2 ( B )1 ( A )3 ( C )4 ( D )5 ( E )LINE CHANGER FOUND / LEFT ON POSITION :TEST VOLTAGE :kV(2)(3) ULTCPOSITIONMETER READINGMULTI- PLIERmVAMETER READINGMULTI- PLIERmVAMETER READINGMULTI- PLIERmVAPHASE APHASE BPHASE CMILLIVOLTAMPERESREMARKSNOTES:1.

9 IF THE LOW-VOLTAGE WINDING IS WYE CONNECTED, THEN Xo IS CONNECTED AS IN SERVICE (USUALLY, THIS WOULD MEAN GROUNDING Xo).2. ALL TESTS SHOULD BE PERORMED ROUTINELY AT THE SAME INDICATE TAP POSITION: RAISED, LOWERED OR :DEFICIENCIES:BUSHING TESTSCALCULATED RESULTS INSULATION TESTAUTO TRANSFORMERS7 POWER FACTOR10/13/2014 POWER FACTOR TESTSPLANTDOBLE FExample PlantExample OwnerOWNER%ASSET IDHUMIDITYAMBIENT #DATEPAGEPOSITIONSUBSTATION95000, REVISED 5/8/2008 COPYRIGHT 2002-2014 POWERDB, BY:TEST EQUIPMENT USED:Default Administrator METER READINGMULTI- PLIERmVAMETER READINGMULTI- PLIERmWMEASUREDCOR. 20 C TEST kVMILLIVOLTAMPERESMILLIWATTSINSULA- TION RATING EQUIVALENT kV READINGS% POWER FACTOR G = GOOD D = DETERIORATEDI = INVESTIGATE B = BAD (REMOVE OR RECONDITION)KEY TO INSULATION RATINGWINDING ENERGIZEDWINDING GROUNDEDWINDING GUARDEDTEST AND LAST TESTAGELAST SHEET OIL LOWHIGH LOW1 TEST OVER-ALL TESTS HTC(TEST 1 MINUS TEST 2)(TEST 3 MINUS TEST 4)METER READINGMULTI- PLIERmVAMETER READINGMULTI- PLIERmW TEST kVMILLIVOLTAMPERESMILLIWATTS EQUIVALENT kV READINGS2346759108121311141 BUSHING SERIAL NO.

10 P H A S E BUSH NO. MEASUREDCOR. 20 CTOPINSULA- TION RATING COLLAR TESTS (mW/mVA)% POWER FACTOR OIL SAMPLEOIL TEMP. C XX mVA AND mW SHOULD COMPARE WITH THOSE FOR CNNHIGHLOWTERTIARY N = NEUTRALHTWYEDELTACOPIES TOTYPEFORMCLASSkVDELTAAMPCAT. SIDE kVLOW SIDE kVTERT. SIDE kVEQUIPMENT TYPECOMMENTS:DEFICIENCIES.