TNC switch stands for Trip Neutral Close switch. As its name, it is a three-position switch. TNC switch uses to control the Circuit Breaker of the electrical system. The trip position is used to trip the circuit breaker, the close position use for closing the circuit breaker, and the neutral position is the default position … Read more
SOTF protection stands for Switch On To Fault. If any fault is persisting in the transmission line during energization of Circuit Breaker or fault happens within 20 ms from the CB closing, the SOTF protection will activate and it will trip the Circuit Breaker immediately to isolate the fault. Why SOTF Protection? We know that … Read more
Auto recloser function is used for transmission line protection system to avoid tripping during transient fault of the line. The function is available in the distance protection relay however separate auto recloser relay is also available for using the function. Auto Recloser Relay Function: We know that the distance protection relay is used to protect … Read more
STUB Protection is simple overcurrent protection it is used to protect the power system transmission line when the line isolator is in open condition. STUB protection is mainly required in one and half breaker busbar schemes. In one and half breaker scheme, 2 nos. lines are connected to 2nos. Bus through the 3 nos. Circuit … Read more
