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Transformer Test Report

The document provides test results for a transformer, including vector group tests, winding resistance measurements, insulation resistance measurements, and high voltage withstand tests. Vector group tests confirmed the transformer has vector groups of Dy11 and Dd0. Winding resistances and insulation resistances were also measured and recorded.

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mayur dhande
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141 views1 page

Transformer Test Report

The document provides test results for a transformer, including vector group tests, winding resistance measurements, insulation resistance measurements, and high voltage withstand tests. Vector group tests confirmed the transformer has vector groups of Dy11 and Dd0. Winding resistances and insulation resistances were also measured and recorded.

Uploaded by

mayur dhande
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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ATLANTA ELECTRICALS PVT. LTD.

TRANSFORMER TEST REPORT Page : 3 OF 5


Customer : ABP Induction System Pvt. Ltd W.O.No. : AET 929 Sr.No. : 929/4570

3 (I) VECTOR GROUP TEST (Dy11) : (At Tap No.:3)

Measurement * 1U - 2U Shorted.
1U1V = 433 1V3V = 422 1U2N = 20
1V1W = 436 1V3W = 421 1V2N = 409
1W1U = 430 1W3W = 423 1U1V = 429
1W3V = 432

Sr. No. Varification Condition Measured Value


1. 1W3W < 1W3V 423 < 432
2. 1V3V = 1V3W 422= 421
3. 1U2N + 1V2N = 1U1V 20 + 409 = 429 Hence Vector Group Is Dy11.

3 (II) VECTOR GROUP TEST (Dd0) : (At Tap No.: 3)


* 1U - 3U Shorted.
Measurement
1U1V = 430 1V2V = 420 1W2V = 424
1V1W = 434 1V2W = 424 1U2V = 8
1W1U = 428 1W2W = 421 1U2W = 8

Sr. No. Varification Condition Measured Value


1. 1V2V = 1W2W 420 = 421
2. 1V2W = 1W2V 424 = 424
3. 1U2V + 1V2V = 1U1V 8 + 420 = 428
4. 1U2W + 1W2W = 1U1W 8 + 421 = 429
Hence Vector Group Is Dd0.
4. WINDING RESISTANCE TEST : (Avg. Temp : 21.20 Deg. C)

H.V. Winding Resistance (Ohm) (Normal Tap No. : 3)


Tap No. 1U - 1V 1V - 1W 1W - 1U Average

3 2.3610 2.3600 2.3600 2.3603

Average Resistance :- 2.3603 x 1.5 = 3.54045 Ohm / Ph.

LV Winding (m. Ohm) (delta) LV Winding (m. Ohm) (Star)


2U - 2V 1.6733 3U - 3V 1.7265
2V - 2W 1.6729 3V - 3W 1.7260
2W - 2U 1.6724 3W - 3U 1.7252
Average 1.6729 Average 1.7259

Average Resistance :- 1.6729 x 1.5 = 2.50935 m. Ohm / Ph. Average Resistance :- 1.7259 x 0.5 = 0.86295 m. Ohm / Ph.

5. INSULATION RESISTANCE MEASUREMENT : ( Avg. Temp : 21.20Deg. C )


( @ 5Kv ) ( @ 2.5Kv ) Instrument :- Insu. Tester
H.V to L.Vd1 :- 32.70 G Ohm L.Vd1 to E :- 13.80 G Ohm
H.V to L.Vs2:- 31.20 G Ohm L.Vs2 to E :- 18.90 G Ohm
H.V to E :- 31.50 G Ohm L.Vd1 L.Vs2:- 11.60 G Ohm
6. SEPARATE SOURCE VOLTAGE WITHSTAND TEST : (At Tap No. : 3)
Instrument :- HV AC Transformer With
Following Voltages Applied At 50 Hz For 60 Sec. Digital KV Meter.
Make :- ATLANTA / KRUTAM
Voltage applied between short - circuited H.V. terminal. Sr. No. :- AET - 21 Cal Due On :- 23/10/10
(All L.V. + N terminals & tank earthed.) : 70.0 kV & Withstood OK. From :

Voltage applied between short - circuited L.V. + N terminals.


(All H.V. terminals & tank earthed.) : 3.0 kV & Withstood OK.

Tested By : Witnessed By :

Chirag Makavana, Mr. Kinjal Patel,


Engr., (Testing), Engineer - Design & Quality,
AEPL, V.U. Nagar. ABP I. S. P. L.

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