LITTLE KNOWN FACTS ABOUT ZCT.

This enables to optimization with the secondary turns in accordance with the helpful Principal pickup current of CT.  The best way ground fault is detected is by means of 50G (Pickup=2A, TD=all around 2sec) as well as by using the 59G and 67G, even so the designer describes the 59G/67G, is just for backup safety.  The principal protection reall