Manufacturing for this product has been discontinued. As an alternative, please refer to the P94V and 350 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

• Three phase undervoltage protection (27) (Hiset and Loset)
• Three phase overvoltage protection (59) (Hiset and Loset)
• Ground overvoltage protection (59N) (Hiset and Loset)
• Voltage unbalance protection (47)
• Under/overfrequency protection (81U/81O)
• Configurable I/O

• 24 Event record
• Analog/digital oscillography

• M+ Setup software for setting, monitoring
• RS232 port, faceplate accessible (19.2 kbps, ModBus® RTU)
• RS485 rear port (19.2 kbps, ModBus® RTU)
• LED dot matrix display and keypad