Answer Posted / karim halawa

simply the dinesty of the copper equal 2A/mm2 or 1.5A/mm2
accprding purity of the substance so using mentioned
formula to get size of bus bar .

How to calculate phase to phase difference ?

2267

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we have earthmat at 110KV substation.we would like to take earth resistance.b some says that by connecting earth megger terminals (C1,P1) at middile point of earthmat (at riser) will cause voltage gradient at other earthmat nods and dont get exat earth resistance.when connecting at end nods will get exat value . is it correct .please explain

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my diploma certificate in my higher education college

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