Voltage and frequency protection relay
GE Relays

The MIV, a member of the M Family of protection relays, is a microprocessor based relay that provides voltage, frequency or voltage and frequency protection for a wide range of applications at any voltage level, including over/undervoltage protection and monitoring, undervoltage detection in automatic transfer systems, overvoltage protection of generators, undervoltage, voltage unbalance protection of motors, monitoring of lines and busbars for healthy/existing/lack of voltage and voltage/frequency load shedding and restoration.

Over/undervoltage protection and monitoring
Overvoltage protection for generators
Undervoltage detection in automatic transfer systems
Undervoltage/voltage unbalance protection for motors
Monitoring of lines and busbars for healthy/existing/lack of voltage