what are the standard IR values should be of R-E, Y-E, B-E,
R-Y, Y-B, B-R of VCB in closed condition and in open
condition for 500KVA & 1000KVA transformers. and what is the
acceptable range when tested by 5000V megger.
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Dear Sir, we met a disaster with our 62.5 kva genset, after rewinding we informed by our contract engg that due to return current coming in neutral & impropper earthing this happend. But after all set up & load balance we checked & found again we have about 20 to 32 amp return current on neutral. we have 12 airconditioner + 12 mini fridge on single phase line. Pl suggest any idea to solved this problem
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