D. MEASURING TOOLS While working on high voltage system we use many tools to identify presence of high voltage system, monitor different parameters and check health of system Below are the components which we generally use: MULTIMETER Multimeter can be used to measure current, voltage, continuity of circuit. • For measurement using multimeter we need terminals to be accessible • Cat III type Multimeters should be used. • ISOLATION MEASUREMENT TOOL (MEGGER) Isolation measurement tool is used to measure resistance connected between its terminals. • It can be done at different voltages. • Based on the resistance value we can predict if high voltage is in contact with low voltage or not. • HIGH VOLTAGE ELECTRICAL SYSTEM (HV) 7
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