Consider the protection system shown in figure below The

Last updated: 6/9/2023

Consider the protection system shown in figure below The circuit breakers numbered from 1 to 7 are of identical type A single line to ground fault with zero fault impedance occurs at the mid point of the line at point F but circuit breaker 4 fails to operate stuck breaker If the relays are coordinated correctly a valid sequence of circuit breaker operation is 1 2 Transmission Line 3 5 BUS C te boo 7