Product Overview
The GE Multilin MIFIIPI11E00HI00 is a microprocessor‑based digital feeder protection relay for power distribution systems. It delivers comprehensive phase and ground overcurrent protection, power metering, breaker control, fault oscillography and time‑tagged event logging. Designed for utility and industrial switchgear, this unit serves as primary feeder protection as well as backup protection for transformers, motors and generators. It features local HMI operation and remote configuration via EnerVista software, widely used as replacement spare for existing MIF II installations.
Series
MIF II family includes multiple order‑code variants for different CT ratings, power supply and recloser options. Direct modern replacement reference: GE Multilin 350 series relayGE Vernova.
Product Features
- Complete three‑phase and ground overcurrent protection (TOC / IOC) with ANSI time‑current curves
- Thermal image protection for equipment overload supervision
- Built‑in breaker open/close control functionality
- Event recording and fault oscillography for post‑fault analysis
- 2×16 character LCD display plus 5‑button keypad for local setup and status reading
- Front‑panel isolated RS232 port; rear RS485 Modbus RTU communication interface
- Two independent setting groups with password access protection
- Non‑volatile flash memory supports field firmware upgrades
- Multiple configurable digital inputs and form‑C relay output contacts
- AC/DC wide‑range universal power supply for substation environments
- Time‑tagged event log for disturbance diagnostics
Product Parameters
| Item | Parameter |
|---|---|
| CT Secondary Rating | 1 A (Phase & Ground) |
| Power Supply | 110‑230 VAC 50/60 Hz / 110‑250 VDC |
| Power Consumption | 10 VA (AC), 10 W (DC) |
| Relay Output Contact Rating | 250 VAC, 16 A resistive |
| Max Digital Input Voltage | 300 VDC |
| Communication | Front RS232, Rear RS485 Modbus RTU |
| Event Log Storage | 32 time‑tagged events |
| Oscillography | 24‑cycle fault capture |
| Mounting | Panel cut‑out mounting |
Product Specifications
- Operating Frequency: 50 Hz / 60 Hz
- Protection Elements: Phase TOC/IOC, Ground TOC/IOC, thermal overload
- Setting Range: Pickup 0.1‑2.4 × In (TOC), 0.1‑30 × In (IOC)
- Software Compatibility: GE EnerVista setup software
- Approvals: UL, CE certified
- Environment: Designed for indoor substation / switchgear cabinet installation
Functions
- Primary feeder overcurrent and ground‑fault protection for distribution feeders
- Backup protection for transformers, large motors and generators
- Circuit breaker control: trip / close command output
- Electrical metering for phase current, ground current values
- Fault waveform capture and time‑stamped event recording for root‑cause analysis
- Local parameter configuration via front‑panel keypad‑display
- Remote monitoring, setting upload / download over Modbus RTU network
- Password‑protected setting groups for operational security
Purpose
Provide multi‑function protection, control and disturbance recording for medium‑voltage distribution feeders; replace multiple discrete electromechanical relays in legacy switchgear panels.
Application Fields
- Utility medium‑voltage distribution substations
- Industrial plant power distribution switchgear
- Backup protection for transformers, large motors and generators
- Retrofit & spare‑part replacement for existing MIF II relay installations
- Power system fault monitoring and post‑event diagnostics
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