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GE Multilin MIFPI55E000H00C MIFP Feeder Protection Relay

The GE Multilin MIFPI55E000H00C, also cataloged as the MIFP Feeder Protection Relay, operates as a dedicated hardware component for feeder current protection and fault monitoring within Multilin MIF series power protection systems.

Hardware Specifications

Parameter	Specification
Model	MIFPI55E000H00C
Brand	GE Multilin
Dimensions	Standard MIF series relay case; exact dimensions not specified in available documentation
Operating Temp	-20 deg C to +60 deg C
Power Consumption	< 10 W
Product Type	Feeder Protection Relay
Series	Multilin MIF Series
Application	Feeder, line, and overcurrent protection
Current Inputs	1 A / 5 A configurable phase and ground current inputs
Rated Frequency	50 Hz / 60 Hz
Protection Functions	ANSI 50, 51, 50N, 51N, 37, 46, 86
Communication Ports	RS232 / USB front port, RS485 rear port
Communication Protocols	Modbus RTU, IEC 60870-5-103
Display Interface	Front panel keypad with backlit LCD
Mounting Type	Flush / panel mount

Industrial Control and Protection Integration

The GE Multilin MIFPI55E000H00C applies microprocessor-based numerical processing for phase and ground current evaluation, programmable trip logic execution, and event recording. The relay supports integration into Substation Automation Systems (SAS) and SCADA networks through RS485 serial communication with Modbus RTU or IEC 60870-5-103 protocols.

The MIFP platform incorporates industrial protection functions including instantaneous and time overcurrent elements, neutral earth fault detection, negative sequence current monitoring, and programmable lockout output control. The relay architecture supports firmware-managed configuration, diagnostic monitoring, and fault record storage for maintenance analysis.

Frequently Asked Questions

Q: What current input levels are supported by the MIFPI55E000H00C relay?
A: The relay supports configurable phase and ground current inputs rated for 1 A or 5 A secondary current signals depending on the selected configuration.

Q: Does the MIFPI55E000H00C support hot-swap replacement?
A: The available documentation does not specify hot-swap capability. Installation and replacement should be performed with the relay isolated from energized circuits according to site procedures.

Q: Which communication interfaces are available for configuration and monitoring?
A: The relay provides a front maintenance interface using RS232 / USB and a rear RS485 serial interface supporting Modbus RTU and IEC 60870-5-103 communication.

Field Installation Guidelines

Install the MIFPI55E000H00C in a suitable protective panel enclosure with correct mechanical support and terminal access clearance. Current transformer secondary wiring should maintain proper polarity and separation from control signal wiring to reduce measurement interference.

Use shielded communication cables where required by the installation environment. Cable shields should be terminated according to the grounding practice of the substation protection system. Maintain separation between current input circuits, auxiliary power wiring, and low-level communication lines to minimize electrical noise coupling.

Before energization, verify CT wiring polarity, auxiliary supply voltage range, digital input states, output relay logic configuration, and communication addressing parameters. Confirm protection settings against approved protection coordination documentation before placing the relay into service.

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