Digital loop tester is a handheld instrument used to measure the impedance of a circuit's earth fault loop. This measurement helps determine if a fault will cause a sufficient current to flow to trip a circuit breaker or fuse, ensuring the circuit's safety. The tester can also calculate the prospective short-circuit current (PSC).
Here's a more detailed breakdown:
Purpose:
Measure loop impedance:
The primary function is to measure the total resistance of the electrical loop, including conductors, circuit breakers, and other components.