Does a motor overload relay replace branch-circuit short-circuit and ground-fault protection?
- AYes, when the motor is three-phase
- BNo, because overload relays protect feeders only for the motor circuit described in the question
- CYes, for every motor circuit
- No; the two devices protect against different conditions
Why D is correct
Overload devices protect motors and conductors from sustained overload, while branch short-circuit and ground-fault devices address high-current faults. A complete motor circuit generally needs both functions.