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HYBRID GIS INSULATED SWITCHGEAR tosa leak check rental

Megger Insulation Resistance Test 2 – Typical Megger test instrument hook-up to measure insulation resistance. The generator can be hand-cranked or line-operated to develop a high DC voltage which causes a small current through and over surfaces of the insulation being tested (Fig. 2).This current (usually at an applied voltage of 500 volts or more) is measured by the ohmmeter, which has an indicating scale.

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