What is Procedure the procedure to select CT's & PT's in 66kV and above substation

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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

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what formula can be apply to calculate the No of rtrand of a cable. ?

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how to use single phase supply for a three phase equipement.

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by using pump duty, how we will can calculate the motor duty(KW)? is there any standard or formula.

0 Answers   HP,

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dear friends, we are use 130 hp load run with 0.98 power factor ( 38KVAR capacitor connected ). if we need improve the the power factor to 1 (unity). how much kvar capacitor to be add. have any formula? please share with me.

3 Answers   Reliance,

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What is mean by vector group? For what purposes we doing vector group test in transformers?

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Why did lightening arrestor solid copper rod head is sharp on mobile tower top?

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two transformer connected in parallel.tap change are different.if i want to on the buscoupler what happen?

1 Answers   Essar,

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what is the saturation point of crgo lamination.

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Why we are mostly using a single 3-phase transformer instead of three 1-phase transformers?

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What are the different types of testing in ht cables?

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