The MIV II, a member of the M II Family of Relays, is a digital device that provides voltage and frequency protection for a wide range of applications at any voltage level. The MIV II can be ordered with one of the following options:

• Four independent time delay phase under/overvoltage elements complete with two independent fixed time ground overvoltage elements
• Four units of frequency protection
• Both voltage protection and two elements of frequency protection

Use the MIV II also to protect electrical machines like transformers, generators or motors against restricted earth faults.

• Configurable logic, curves, I/Os and LEDs
• Flash memory for field upgrades
• Two settings groups
• Password protection for local operation
• Automatic display of last fault information
• Three models available for voltage, frequency and combined protection
• Drawout case for easy maintenance
• AC/DC power supply
• Access via front panel keypad or communication links
• Diagnostic features event recording and analog/digital oscillography
• EnerVista software for setting & monitoring
• Isolated front RS232 serial port
• RS485 rear port

• Voltage and/or frequency protection at any voltage in automatic transfer systems, generators, motors, lines and busbars

• Three-phase over and undervoltage, ground overvoltage
• Voltage unbalance, over and underfrequency
• Circuit Breaker control (open/close)
• Configurable I/O
• 6 outputs, four configurable, plus trip and alarm;

• 24-event record
• Analog/digital oscillography 24 cycles at 8 samples per cycle
• Frequency and per-phase voltage
• Monitoring of the last 5 trips information from the display

• 2x16 character LCD display
• 6 LED indicators, 4 configurable in function and color
• EnerVista software for setting and monitoring
• Front RS232 and rear RS485 ports using ModBus® RTU protocol up to 19,200 bps