Earth fault

Open circuit

Short circuit

High value series resistance fault

To measure more quantity

To extend the range

To use as a earth tester

To get accurate reading

Earth tester

Ohm meter

Megger

Wheatstone bridge

For easy Identification

To Avoid transfer of heat from power cable to control cable

To avoid leakage

To avoid short circuit

Open circuit

Short circuit

Earth fault

Earth leakage