what is the formula for calculating the phase clerance between two phases and phase to earth how to calculate the cable for a motor

0 Answers  

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which stabilizer is better ? AVR, Servo Stabilizer, Static stabilizer etc & why explain it

0 Answers  

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how to reduce the magnetizing current in distribution transformers

1 Answers  

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How many types of lightings are there

2 Answers   ABB, Met Trade,

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what is function of pump in DG?

6 Answers   HP,

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What are the types of windings according to the construction?

0 Answers  

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What are the special cables required for explosion proof wiring?

0 Answers  

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what is the difference between KW and KVA?

15 Answers  

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I have connected 04nos. earthings to a transformer through 04nos. earthing pits seperately. 02nos. earthings are connected to T/F body, and 02nos. earthings are connected to T/F neutral.T/F capacity is 2000KVA, 11KV/415V. But after completing of 02 years successful operation ,we are facing following problems- 1. CT/PT occured blast one time 2. HT cable box occured blast two times 3. One body earthing strip and one neutral earthing strip of transformer are overlapping at some places. Whenever these two strips are pressed at overlapped points, they made spark. What is the reason of spark? Please explain the reason & rectification of above problems

5 Answers  

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What is Partial Discharge test .Please specify that this test can be test on 11/0.433 KV,630 KVA Transformer.

1 Answers   NBCC,

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As we know multiplicity factor derivation equation is as below MF = main c t ratio / main p t ratio * meter c t ratio / meter p t ratio * meter dial constant Where in digital meters for HT kwh import export now a days meter constant are calibrated already which is 1 So my question is For HT 11kv 110 v line values are as below Main c t and p t ratio are 11000 v and 110 v and 20/5 means 20 amp and 5 amp Now meter values are 11000/√3/110√3 and primary and secondary amp are displayed as -/5 amp on kwh meter so what will be the MF for this meter ?

1 Answers   NEPC,

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Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer

0 Answers  

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