Cutler-Hammer 8312A63H01

The Type MPCV microprocessor-controlled relays are designed to replace the Type CN-33 electromechanical master relay, the Type CNJ electromechanical phasing relay, and the Type BN electromechanical desensitizing relay. The MPC series relays use the same voltage and current inputs as do the electromechanical equivalent. They also continually monitor voltage across an open breaker and current through a closed breaker and perform the following functions.

• The trip contact will close upon balanced fault conditions if the positive sequence power flow is out of the network.
• The close contact will close if the ensuing positive sequence power will be into the network.
• The trip contact will close upon the flow of reverse magnetizing current of its associated transformer.

MPCV Controller /  Digital Control Pendant, Style No. 8312A63H01