GE MIFIIPI55E10H100 – Multilin MIF II Digital Feeder Management Relay

Technical Specifications

• Manufacturer: GE Vernova (GE Multilin)
• Model: MIFIIPI55E10H100
• Series: Multilin MIF II (MII Family)
• Type: Digital Feeder Management Relay
• Protection Functions: Three-phase/groud overcurrent (TOC/IOC), thermal image protection, earth fault, cold load pickup, breaker failure protection
• Control Functions: Circuit breaker open/close control, four-shot autorecloser, load shedding, recloser control
• Current Input: 5 A phase and ground CT inputs
• Voltage Input: 100–240 VAC, 50/60 Hz
• Power Supply: 110–250 VDC / 110–230 VAC (wide-range universal)
• Communication Ports: Front RS232 (isolated), rear RS485; supports Modbus RTU, IEC 60870-5-103
• User Interface: LCD display (16 characters, backlight), 5-button keypad, status LEDs
• Event Recording: 32-event memory, analog/digital oscillography, last 5 trips information
• Memory: Flash memory for field firmware upgrades, two programmable setting groups
• Dimensions (H×W×D): 318 mm × 254 mm × 152 mm
• Weight: 4.53 kg (10 lbs)
• Operating Temperature: -20°C to +60°C (-4°F to 140°F)
• Certifications: CE, UL, CSA, IEC 60255 compliant

Key Features

1. Comprehensive Protection & Control
   • Provides time-delayed and instantaneous overcurrent protection for three-phase and ground faults.
   • Integrates thermal image protection to prevent equipment overheating and damage.
   • Supports four-shot autorecloser and cold load pickup to enhance system stability during restoration.
2. Advanced Communication & Monitoring
   • Equipped with dual isolated serial ports (front RS232, rear RS485) for local and remote connectivity.
   • Compatible with EnerVista™ Software for configuration, monitoring, and troubleshooting.
   • Captures 32 events and oscillographic data for detailed fault analysis and maintenance planning.
3. Flexible & User-Friendly Configuration
   • Offers configurable logic, time-current curves (IAC/EPTAR-C), I/Os, and LEDs to adapt to diverse application needs.
   • Features password protection for secure local operation and two setting groups for quick mode switching.
   • Enables field firmware upgrades via flash memory to accommodate future functional enhancements.
4. Rugged Industrial Design
   • Compact, heavy-duty chassis designed for harsh electrical substation and industrial environment.
   • Wide-range universal power supply supports both AC and DC inputs for flexible installation.
   • High-visibility LCD and status LEDs provide clear, real-time operational status updates.

Application Scenarios

• Power Distribution Networks (Primary)
  • Primary circuit protection for medium-voltage (MV) and low-voltage (LV) distribution feeders in utilities and industrial plants.
  • Overcurrent, earth fault, and reclosing control for radial and loop distribution systems.
• Power Generation Plants
  • Backup protection for generators, transformers, and busbars in thermal, hydro, and renewable power stations.
  • Feeder protection for auxiliary systems and motor control centers (MCC).
• Industrial Facilities
  • Motor and feeder protection in oil & gas, chemical, petrochemical, and manufacturing plants.
  • Protection for critical loads such as large motors, pumps, and compressors.
• Substation Automation
  • Integration into SCADA and DCS systems via Modbus and IEC 60870-5-103 protocols for remote monitoring and control.
  • Fault data logging and analysis for predictive maintenance and system reliability improvement。