The core mission of the Insulation Resistance Tester is to measure the insulation resistance of electrical equipment and cables.
The Insulation Resistance Tester (commonly known as the “Megohmmeter” or “Megger”) is the “basic health check device” used in power preventive testing to evaluate the insulation health condition of electrical equipment.
Combined with what you previously learned about the Loop Resistance Tester, although both measure “resistance,” their focuses are completely different: the Loop Resistance Tester uses high current to check whether the “joints” of the conductive circuit are tightly connected; while the Insulation Resistance Tester applies high voltage to assess whether the “barrier” of the insulating material is intact, preventing current from leaking where it should not flow.
The following provides a detailed analysis of this instrument's core principles, technical features, and mainstream equipment parameters:
