Correct option is C
Miniature circuit breakers (MCBs): These are designed to be resettable after tripping due to a fault, meaning they can be reused once the issue causing the fault is fixed.
Miniature circuit breakers (MCBs): These are designed to be resettable after tripping due to a fault, meaning they can be reused once the issue causing the fault is fixed.
What is the advantage of using the current grading in relay systems?
An overcurrent relay having a current setting of 125% is connected to a supply circuit through a current transformer of ratio 400/10. The pick-up value will be:
The pick-up value of a relay is 7.5 A and the fault current in the relay coil is 30 A. Its plug-setting multiplier is ________.