Switchgear & Protection | Draw neat sketch of induction type reverse power relay and explain its working.

Induction Type Reverse Power Relay:

Figure shows the induction type directional relay used for the reverse power protection. Here the shunt magnet coil and series magnet coil are exited from machine to whom protection is to be provided (e.g. Alternator). When power flow direction is correct, the disc rotates in the normal direction and does not close trip contacts. But when the power flow reverses, the disc rotates in opposite direction causing closure of trip contacts.