Answer / subaharan

first check the transformer bushings and their condition,then
you meggering the transformer each phase to phase and phase to
earth.
power cable you check the high voltage test which is used for
measuring the leakage current,meggering and continuity
checking.
switchgear the same meggering,isolator checking,relay
testing(set various values of currents,voltages and set time
for tripping) make the fault and note the trip time.

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i want to measure voltage difference between neutral and earth so i just simply use voltmeter. my question is that may i use this measure continuosly.or there are some electricity board restrication on that? or it creat some problem on my measuring device..?

2 Answers   NEEC,

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