GE MIFIIPI55E00HI00

Product Overview

The MIFIIPI55E00HI00 is a microprocessor-based digital feeder protection relay from GE Multilin’s MIF II product line, engineered for comprehensive protection, control, and monitoring of medium-voltage and low-voltage distribution feeders. It delivers primary protection for feeders and backup protection for transformers, busbars, generators, and large motors, integrating overcurrent, earth fault, directional protection, and breaker control functions in a single device. The relay uses a high-speed microprocessor for real-time fault detection, supports multiple communication protocols (IEC 61850, Modbus RTU/TCP, DNP3), and features an LCD interface with a keypad for local configuration and diagnostics.
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Description

Technical Specifications

Parameter Details
Model Number MIFIIPI55E00HI00
Manufacturer General Electric (GE Multilin)
Product Line Multilin MIF II Series
Function Code PI55 (Feeder Protection)
Hardware Revision E00
Configuration Code HI00
Auxiliary Power Input 24–250V DC / 100–240V AC, 50/60Hz, 10W
Current Inputs (CT) 5A nominal (0.5–12A range), 3-phase + neutral
Voltage Inputs (VT) 100V phase-phase / 57.7V phase-neutral (configurable)
Protection Functions Overcurrent (50/51), Earth Fault (50N/51N), Directional Overcurrent (67), Overvoltage (59), Undervoltage (27)
Communication Protocols IEC 61850 (GOOSE/MMS), Modbus RTU/TCP, DNP3.0, RS232/RS485
I/O Configuration 8 Digital Inputs, 4 Programmable Relay Outputs (SPDT, 2A @ 250V AC)
Event Recording 1024-event sequence of events (SOE), 16-cycle oscillography
Operating Temperature -40°C to +70°C
Storage Temperature -40°C to +85°C
Degree of Protection IP20 (Front Panel)
Mounting Style Panel Mount (177mm × 132mm × 60mm)
Weight 1.8 kg
Certifications IEC 60255, IEEE C37.90, IEC 61850, UL 508

Function Features

  • Comprehensive Protection Suite: Combines overcurrent (50/51), earth fault (50N/51N), directional overcurrent (67), overvoltage (59), and undervoltage (27) functions for full feeder protection.
  • Directional Protection: Directional overcurrent and earth fault protection isolate faults in radial and looped distribution networks, preventing unnecessary outages.
  • Breaker Control & Auto-Reclose: Integrated breaker control (close/trip) and auto-reclose logic with programmable reclose sequences for fault clearing and system restoration.
  • Advanced Communication: Supports IEC 61850 (GOOSE/MMS), Modbus RTU/TCP, and DNP3 for seamless integration with SCADA systems and remote monitoring.
  • Local & Remote Configuration: LCD keypad for local setup and diagnostics; GE Multilin UniLink software for remote configuration, monitoring, and data logging.
  • Event Recording & Oscillography: 1024-event SOE and 16-cycle oscillography capture fault data for root-cause analysis and compliance reporting.
  • Programmable I/O: 8 digital inputs and 4 relay outputs for custom control logic, alarm monitoring, and interlocking with external devices.
  • Universal Auxiliary Power: 24–250V DC / 100–240V AC input ensures compatibility with global power systems.
  • High Accuracy Measurement: Real-time monitoring of current, voltage, power, energy, and harmonic distortion for load management and predictive maintenance.
  • Panel Mount Design: Compact form factor (177mm × 132mm × 60mm) and IP20 protection simplify installation in control panels and switchgear.

Application Scenarios

  • Power Distribution Networks: Primary protection for medium-voltage/low-voltage feeders in utility and industrial distribution systems.
  • Industrial Plants: Backup protection for transformers, busbars, generators, and large motors in manufacturing facilities and refineries.
  • Critical Infrastructure: Protection for feeders in data centers, healthcare facilities, and airports, ensuring continuous power availability.
  • Renewable Energy Systems: Integration with solar/wind farms to protect feeders connecting inverters to the grid, supporting grid code compliance.
  • Commercial Buildings: Protection and monitoring of electrical distribution feeders in office complexes, retail centers, and high-rise buildings.
  • Remote Substations: Communication via IEC 61850/Modbus enables remote monitoring and control in unmanned substations.
  • Marine & Offshore: Compliance with marine standards for feeder protection on ships and offshore platforms, with rugged design for harsh environments.
  • Retrofit Projects: Direct replacement for legacy electromechanical relays, enhancing protection and diagnostic capabilities without system reconfiguration.

Compatibility and Integration

  • MIF II Ecosystem: Fully compatible with GE Multilin MIF II accessories, including communication modules, I/O expansion cards, and auxiliary power supplies.
  • Communication Protocols: IEC 61850 (GOOSE for fast interlocking, MMS for data exchange), Modbus RTU/TCP, DNP3.0, and RS232/RS485 for SCADA integration.
  • Configuration Software: GE Multilin UniLink software for remote configuration, firmware updates, event log download, and oscillography analysis.
  • Panel Mounting: Fits standard control panels with dimensions 177mm × 132mm × 60mm, compatible with 19-inch racks and custom enclosures.
  • Breaker Interface: Programmable relay outputs (SPDT, 2A @ 250V AC) for direct breaker control, supporting close/trip and alarm functions.
  • Standards Compliance: Meets IEC 60255 (relay protection), IEEE C37.90 (surge withstand), and IEC 61850 (communication) standards for global deployments.
  • Documentation: Detailed guidelines available in the GE Multilin MIF II User Manual and PI55 Function Code Technical Guide, including wiring diagrams and protection setting examples.
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