transformer test report

FINAL TEST Document No.: QF/TR/ Issue No. : 001 Format No: 00 Department : Quality Assurance Issue Date : OCT 09 Page : DATE PCN NO. CUSTOMER : KVA HV LV HV CURRENT LV CURRENT VECTOR TAPPING 25 11000 433 1.31 33.34 Dyn11 NA 1 Measurement of Voltage Ratio & Vector Group 9 Sr. No. Tap No. Specified U phase V phase W phase Average 1 N 44.00 44.00 44.01 44.03 44.01 2 Measurement of Winding Resistance Ambient Temperature 28 Tap No. LV Resi. (mohms) HV Resistance ( ohms) 2u-2n 2v-2n 2w-2n 1U-1V 1V-1W 1W-1U N 54.47 54.88 56.65 117.51 112.920 113.8 Average LV resi. per phase at principal Tap amb temp 55.333 mohms Average HV resi. per phase at principal Tap amb temp 172.115 ohms Average LV resi. per phase at principal Tap 75 deg temp 65.613 mohms Average HV resi. per phase at principal Tap 75 deg temp 204.089 ohms 3 Measurement of Insulation Resistance at 2500 volts G HV / LV LV/ E HV / E 9.49 14.3 13.8 4 Measurement of No Load Loss & magnetising current HV OP Tap N Meas. Freq 51.27 Corr. Factor 0.96300 Power 50 Hz Phase Voltage Phase Current Phase Watt Rated Loss 2u-2n 243.61 2u 0.8385 W1 9.12 2v-2n 262.63 2v 0.6002 W2 20.63 2w-2n 254.62 2n 0.7849 W3 64.47 AVG 250.45 AVG 0.741 AVG 94.22 5 Induced Over voltage Test stood Two times the rated voltage on LV side at 150 6 Separate Souce on HV=28 KV & LV = 3 KV for one minute withstood successfully 7 Measurement of Load Loss & %age Impedance LV SHORTED PHASE VOLTAGE PHASE CURRENT PHASE WATT Temp. 1U-1N 236.37 1U 1.3 W1 151.63 1V-1N 252.05 1V 1.3 W2 165.75 1W-1N 245.03 1W 1.3 W3 148.94 AVG 244.5 AVG 1.300 AVG 466.32 CALCULATION : >> 475.11 watts 288.16 watts 179.36 watts 467.52 watts 7.59 watts 570.15 watts Stray Loss at 75 deg C 6.22 watts Load Losses at 75 deg C 576.37 watts 423.45 volts 427.42 volts % Resistance at amb Temp 1.90 Sr. No. Particular Guarnteed % Impedance at amb Temp 3.89 1 No Load Loss 100 % Reactance at amb Temp 3.39 2 Load Loss 685 % Resistance at 75 deg C 2.31 3 Total Loss 785 % Impedance at 75 deg C 4.10 4 4.50% TESTED BY: WITNESSED BY: Rated amp Corr. Load Losses in watts LRC ((Rated amp )/(Average Test CurrentxCTMF)) 2 xLTC LRC HV Copper Loss at amb Temp I 2 RH LV Copper Loss at amb Temp I 2 RL Total Copper Losses TC at amb temp Stray Losses at amb LRC - TC Total Copper Losses TC at 75 deg temp At Test Amp Imped. Voltage measured t Rated Amp Imped. Voltage meas. VRC= VTC x ((Rated amp)/(Average Test ampxCTMF)) VRC = % Z at 75 o C

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testing as per IS 2026

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Department : DATE

Quality Assurance PCN NO.HV LV

FINAL TEST Document No.: QF/TR/QAD Issue No. : 001 Format No: 006 Issue Date : OCT 09 Page :1 of 1CUSTOMER :HV CURRENT

KVA 251

LV CURRENT VECTOR

TAPPING

Conductor

11000

433

1.31

33.34

Dyn11

NA9

Measurement of Voltage Ratio & Vector Group

Aluminium 225

5 6 7

Sr. No. Tap No. Specified U phase V phase W phase Average Difference % 1 N 44.00 44.00 44.01 44.03 44.01 0.027 Measurement of Winding Resistance Ambient Temperature 28 deg C LV Resi. (mohms) HV Resistance ( ohms) Tap No. 2u-2n 2v-2n 2w-2n 1U-1V 1V-1W 1W-1U N 54.47 54.88 56.65 117.51 112.920 113.8 Average LV resi. per phase at principal Tap amb temp 55.333 mohms Average HV resi. per phase at principal Tap amb temp 172.115 ohms Average LV resi. per phase at principal Tap 75 deg temp 65.613 mohms Average HV resi. per phase at principal Tap 75 deg temp 204.089 ohms Measurement of Insulation Resistance at 2500 volts Gohm HV / LV LV/ E HV / E 9.49 14.3 13.8 Measurement of No Load Loss & magnetising current HV OPEN Tap N 51.27 Corr. Factor 0.96300 90.737 Meas. Freq Power 50 Hz Phase Voltage Phase Current Phase Watt Rated Loss 90.57 2u-2n 243.61 2u 0.84 W1 9.12 2v-2n 262.63 2v 0.6 W2 20.63 2w-2n 254.62 2n 0.78 W3 64.47 AVG 250.45 AVG 0.741 AVG 94.22 Induced Over voltage Test Withstood Two times the rated voltage on LV side at 150 Hz for 40 Sec. Separate Souce on HV=28 KV & LV = 3 KV for one minute withstood successfully Measurement of Load Loss & %age Impedance LV SHORTED TAP N CURRENT Temp. 21 PHASE VOLTAGE PHASE PHASE WATT 236.37 1.3 151.63 1U-1N 1U W1 252.05 1.3 165.75 1V-1N 1V W2 245.03 1.3 148.94 1W-1N 1W W3 1.300 466.32 AVG 244.5 AVG AVG

CALCULATION : >>At Rated amp Corr. Load Losses in watts LRC =

((Rated amp )/(Average Test CurrentxCTMF))2xLTC 475.11 watts watts watts watts watts watts watts watts 288.16 179.36 467.52 7.59 570.15 6.22 576.37

#REF!

LRC HV Copper Loss at amb Temp I RH2

LV Copper Loss at amb Temp I RL2

Total Copper Losses TC at amb temp Stray Losses at amb LRC - TC Total Copper Losses TC at 75 deg temp Stray Loss at 75 deg C Load Losses at 75 deg C At Test Amp Imped. Voltage measured VTC

423.45 volts At Rated Amp Imped. Voltage meas. VRC= VTC x ((Rated amp)/(Average Test ampxCTMF)) VRC = 427.42 volts 1.90 Sr. No. 3.89 1 3.39 2 2.31 3 4.10 4 WITNESSED BY:Particular Guarnteed 100 No Load Loss

% Resistance at amb Temp % Impedance at amb Temp % Reactance at amb Temp % Resistance at 75 deg C % Impedance at 75 deg C TESTED BY:

Load Loss Total Loss % Z at 75oC

685 785 4.50%

Measured 91 576 667 4.10

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