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MINII Ground Protection System
MINII Ground Protection System

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.

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

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