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MINII Ground Protection System
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MIN II - Legacy

Manufacturing for this product has been discontinued. As an alternative, please refer to the Multilin 350.
The MIN II, a member of the M II family of protection relays, is a microprocessor based relay that provides ground directional protection on distributed networks at any voltage level and backup/auxiliary ground directional protection for transformers, generators and motors. Additionally, it can be used to create a separate directional comparison ground scheme in pilot channels used for distance relaying.

Features and Benefits
  • Reduce troubleshooting and maintenance cost - Event recording, and analogy/digital oscillography
  • Design flexibility - Easy to use programming logic
  • Access to information - Modbus® RTU communications
  • Configurable logic, curves, digital I/Os, and LEDs
  • Follow technology evolution - Flash memory for product field upgrade
  • Asset monitoring - Breaker health, and breaker failure protection
  • Two settings groups
  • Password protection for local operation
  • Automatic display of last fault information
  • AC/DC power supply
  • Access via front panel keypad or communication links
  • EnerVista™ compatible
  • Isolated RS232 port

  • Directional ground protection at any voltage level
  • Backup/auxiliary protection for line schemes
  • Component relay for transformers, generators and motors

Protection and Control
  • 2 ground IOC (high and low) units for grounded systems
  • 2 ground TOC (high and low) units for grounded systems
  • 2 directional units for grounded systems
  • 2 directional overcurrent units for Petersen coil
  • 2 directional overcurrent units for isolated ground
  • Directional comparison: scheme logic
  • 4 preconfigured overcurrent curves (ANSI or IEC)
  • Configurable breaker failure protection
  • Configurable I/O
  • 6 outputs: trip, service, 4 auxiliary

Monitoring and Metering
  • 32-event record, analog/digital oscillography
  • KI2 counter for breaker maintenance
  • Ground current metering
  • 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
  • Front RS232 and rear RS485 ports using Modbus® RTU protocol up to 19,200 bps
  • EnerVista™ software - an industry leading suite of software tools that simplifies every aspect of working with GE Multilin devices