What does Ground Fault (GDF) mean? A ground fault is a type of fault in which straying electrical current deviates from its intentional pathway and flows directly to the earth (ground) or in other words contact between the job and the coil which could cause potential harm to the inductor(coil) or job or a person.
The Inductor Ground Fault is connected through the isolated current transformer. The current transformer can sense leakage current from the ground cable and the set reference on the GDF unit, once the set reference is lower than the leakage current it latches the ground fault.