sir i work in fertilizer plant and in the plant, the MV motors are protected by 64 relay and transformer are protected by 51N relay.
the 64 relay current sensing is from a ring core CT and the 51N is connected between the star point of CT and the star point of 51 relay ( the 51 is over current relay and three 51 relay are connected in star connection)
sir i work in fertilizer plant and in the plant, the MV motors are protected by 64 relay and transformer are protected by 51N relay.
the 64 relay current sensing is from a ring core CT and the 51N is connected between the star point of CT and the star point of 51 relay ( the 51 is over current relay and three 51 relay are connected in star connection)
