An ungrounded threephase electrical system develops a fault

An ungrounded three-phase electrical system develops a fault on one of its lines to ground. Which one of the following will happen to the system at this time? All of the poles of the overcurrent protection device will open, shutting off all line-side power. A single pole of the circuit breaker will trip. The ground fault will heavily damage the system. Nothing will happen until a second ground fault occurs.

Solution

Answer is option (C)

The ground fault will heavily damaged thhe ungroungrvsysten ll