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MIV II - Legacy

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

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.

Features and Benefits
  • 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

Protection and Control
  • 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;

Monitoring and Metering
  • 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

User Interface
  • 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