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Department : DATE
KVA 25 1
2
3
4
5 6 7
Quality Assurance PCN NO. HV
LV
11000
433
FINAL TEST Issue No. Issue Date
Document No.: QF/TR/QAD : 00 001 Format No: 006 : OCT 09 Page :1 of 1 CUSTOMER :
HV CURRENT
LV CURRE VECTOR
1.31
33.34
TAPPING
Dyn11
NA
Measurement of Voltage Ratio & Vector Group
9
Conductor
Aluminium 225
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 ( oh 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 Averag rage HV resi. si. per phas hase at princip cipal Tap 75 deg temp 204.08 4.089 9 ohm ohms Measu Measure reme ment nt of Insul Insulati ation on Resi Resista stanc nce e at at 2500 2500 volt volts s Goh Gohm m 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 AV G 250.45 AV G 0.741 AVG 94.22 Induced Over voltage Te T est Withstood Two times the rated voltage on LV side at 150 Hz for 40 Sec. Sepa Separa rate te Souc Souce e on on HV= HV=28 28 KV & LV LV = 3 KV KV for for one one min minut ute e wit withs hsto tood od succ succes essf sful ully ly Measurement of Lo 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 AV G 244.5 AV G AVG
CALCULATION : >> At Rated amp Corr. Load Losses in watts L RC =
LRC
((Rated amp )/(Average Test CurrentxCTMF))2xLTC 475.11
watts
288.16
watts
LV Copper Loss at amb Temp I RL
179.36
watts
Total Copper Losses TC at amb temp
467.52
watts
Stray Losses at amb LRC - TC
7.59
watts
Total Copper Losses TC at 75 deg temp
570.15 6.22 576.37
watts watts watts
HV Copper Loss at amb Temp I2RH 2
Stray Loss at 75 deg C Load Losses at 75 deg C At Test Amp Imped. Voltage measured VTC
#REF!
423.45 volts At Rated Amp Imped. Voltage meas. VRC= VTC x ((Rated amp)/(Average Test ampxCTMF)) VRC = % Resistance at at amb Temp % Impedance at amb Temp % Reactance at amb Temp % Resistance at 75 deg C
% Impedance at 75 deg C TESTED BY:
427.42 1.90 3.89 3.39 2.31
volts Sr. No. 1 2 3
4.10 WITNESSED BY:
4
Load Loss Total Loss
685 785
Measured 91 576 667
% Z at 75oC
4.50%
4.10
Part Partic icul ular ar Guar Guarnt ntee eed d 100 No Load Loss
