Product Description
MIFII‑PI55E20LO00 is a digital feeder‑management protection relay of GE Multilin MIF‑II series (GE Vernova). Designed for utility and industrial distribution‑system protection, it provides comprehensive overcurrent protection for feeders, motors and distribution transformers. Supports IEC time‑current curves, phase/ground time‑overcurrent (TOC), two‑stage instantaneous‑overcurrent (IOC), thermal‑image protection, cold‑load pickup, breaker‑failure protection and configurable logic functions. Equipped with front‑panel LCD display, front‑side RS232 and rear‑side RS485 Modbus‑RTU interfaces. Parameter setting, event log and oscillography are managed via EnerVista software. LO power variant operates on 24‑48 VDC; six configurable relay outputs, no autoreclose function. This product line is discontinued, used as spare‑part replacement for substation and industrial‑distribution protection systemsGE Vernova。
Technical Parameters
| Item | Specifications |
|---|---|
| Product family | MIF‑II Multilin M‑Family Protection Relay |
| Model | MIFII‑PI55E20LO00 |
| Protected objects | Feeders, motors, transformer backup‑protection |
| CT input | Phase CT 5A; Ground CT 5A |
| Protection curves | IEC standard curves |
| Protection functions | Phase/Ground TOC, 2‑level IOC, thermal‑image protection, cold‑load pickup, breaker‑failure protection, configurable logic |
| Output contacts | 6 programmable relay outputs (trip, alarm, auxiliary) |
| Recording | 32‑event records, fault oscillography, fault‑data storage |
| HMI | 2×16‑character LCD, keypad, LED status indicators |
| Communication | Front RS232; rear RS485 Modbus‑RTU |
| Configuration software | EnerVista |
| Power supply | LO: 24‑48 VDC (operating range 19‑58 VDC) |
| Mounting | Panel flush‑mount |
| Protection class | IP52 (front panel), IP20 inside cabinet |
| Operating temperature | -20℃ ~ +60℃ |
| Storage temperature | -40℃ ~ +85℃ |
| Humidity | 5‑95 % RH non‑condensing |
| Status | Manufacturer discontinued, power‑system spare part |
Product Application
- Industrial power distribution: main‑protection for medium/low‑voltage feeders against short‑circuit, overload and ground‑fault
- Substation: protection for station‑service transformers and feeder circuits
- Motor‑protection: backup overcurrent & thermal‑overload protection for LV/MV motors
- Auxiliary‑power system protection in power plants
- Factory & municipal distribution‑network protection & control
- Maintenance & spare‑part replacement for legacy MIF‑II installations
Related Series Models
MIFII‑PI55E20LO00 (No autoreclose, 24‑48 VDC) MIFII‑PI55E20HI00 (110‑250 VDC / 120‑230 VAC supply) MIFII‑PA55E20LO00 (ANSI curve variant) MIFII‑PI55E2RLO00 (4‑shot autoreclose enabled)
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