A megger, also known as a insulation resistance tester, is a specialized instrument used to measure the insulation resistance of electrical wiring, cables, and equipment. It applies a high DC voltage to the insulation and measures the resulting current flow. A high resistance reading indicates good insulation, while a low reading suggests insulation breakdown and potential safety hazards. Meggers are commonly used in electrical maintenance and troubleshooting to ensure the safe and reliable operation of electrical systems.
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