I did oil BDV test of 1600 KVA trafo 20KV/400V as per IEC 156. Result is 1) 58 KV 2) 58 KV 3)40 KV 4) 50 KV 5) 58 KV 6) 18 KV. Avr is 47 KV. Can we say oil is still ok even in the 6th test BDV is 18 KV ?

1 Answers  

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How to calculate the average power factor in 3 phase unbalanced system

5 Answers   Bhel, MacLellan,

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why active power is called as real power or working component.What is the exact function of active, reactive & apperent power.

3 Answers  

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what is the power ratio between power in star and delta circuit?

3 Answers  

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what is tandem isolator ??????????

5 Answers  

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How do I calculate a WTI CT ofa 1250kVA 6600/400V transformer

0 Answers  

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Briefly define and explain the following different types of Pulse Amplitude Modulation (PAM) with some examples. i) 2-PAM ii) 4-PAM iii) 8-PAM iv) 16-PAM v) Quadrature Amplitude Modulation (QAM)

0 Answers   UOG,

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Utility company give the supply to customer in KVA but bill them for Watt.why?

1 Answers   L&T,

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How magnetic balance test of single phase transformer is done,Especially in ESP transformer rectifier set.

2 Answers   Bhel,

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how to calculate diesel consumption of a D.G.Set?

4 Answers  

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what is the breakdown voltage value in BDV test in transformers?

6 Answers   Siva, TATA,

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in my working site. momentary jerck in electrical supply ocurred frequently which cause of multiple losses in our electrical equipements. how can we protect our electrical machines and equipements in this situation.

1 Answers  

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