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 procedure recommended?
A
insulation may be damaged
B
insulation may be covered with moisture
C
armature windings will have a greater number of leakage paths
D
larger machines may acquire a charge of static electricity during operation
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Question 1 / 205eccefa4bacbc34ba4d4840d
Question 1 of 205eccefa4bacbc34ba4d4840d
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 procedure recommended?
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 procedure recommended?