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Thank you very much for the valuable feedback Redsnake and che1234. ***3. Are there any International standard for tinplating of copper bus bars where required testing methods are specified to assess the quality of tinplating ? Yes, there are IEC and ANSI standards. Sorry, I do not have them...

Hi, 1. what is the most suitable method in switchgear manufacturing either using already tin plated busbars or get tinplated after cutting and drilling before assemble? 2.If manufacture uses tinplated bus bars how can they treat drilled holes and cutting ages which got exposed ? are there any...

Can design flux density (1.72 T) can cause this ? I meant is this flux density is too high?

Hi, Both are Dyn11 and neutral of Gen and the 250kVA tf are earthed.

Hi, When we doing no load test for newly built transformer it was found that we can not supply balance voltage to the input side. We are feeding from MG set through 250kVA 33/415 small transformer to 33kV side of 5 MVA transformer. when we increase the voltage supply voltage show phase...