Engineering · Electrical — Testing
A megohmmeter (megger) is used to measure:
- ACurrent draw of a motor
- BInsulation resistance of windings and cables✓ Correct
- CPower factor of a circuit
- DFrequency of the generator
Explanation
A megger applies a high DC test voltage to measure insulation resistance (in megohms). Low readings warn of moisture or deteriorated insulation before a winding fails.
Authority: Marine Electrical (USCG engineering topic)
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