Before testing insulation with a megohmmeter, the windings of large machines should be grounded for about 15 minutes just prior to the test. Why is th...

Question

Before testing insulation with a megohmmeter, the windings of large machines should be grounded for about 15 minutes just prior to the test. Why is this recommended?

Accepted Answer

static charge of the machine may give a false reading

Engine 2014: Electricity

Before testing insulation with a megohmmeter, the windings of large machines should be grounded for about 15 minutes just prior to the test. Why is this recommended?

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