What is LSIG breaker?
Usually, arcing ground-fault currents are not large enough to be detected by the standard MCCB protective device. But, if left undetected, they can increase sufficiently to trip the standard protective device.
The overloading of a circuit is a major reason leading to frequent short-circuit tripping. A circuit breaker trips if it is attempting to draw more power than it is intended to carry. This happens usually by means of spring-loaded component in the breaker.
Circuit breaker Trip Unit. The trip unit is the brains of the circuit breaker. The function of the trip unit is to trip the operating mechanism in the event of a short circuit or a prolonged overload of current.
What is trip unit of Mccb?
How to Calculate Circuit Breaker Trip Settings
Electronic trip units are devices which guarantee a system of protection based on microprocessor electronics. Function S (Short time delay) setup current and time delay. Function I (Instantaneous) setup current without delay.
What is electrical LSI?
LSIG (long time, short time, instantaneous, ground) -equipped circuit breakers are often required by. code in the application of larger UPS systems.