Description

GE Multilin 369-HI-R-M-0-0 Motor Protection Relay

Configured for three-phase motor protection, monitoring, and control execution in GE Multilin 369 series protection systems, the GE Multilin 369-HI-R-M-0-0 (369-HI-R-M-0-0 Motor Protection Relay) provides direct electrical protection and measurement functions for medium voltage motor applications.

Hardware Specifications

Parameter	Specification
Model	369-HI-R-M-0-0
Brand	GE Multilin
Origin	GE Multilin 369 Series
Operating Temp	-40 deg C to +60 deg C
Power Consumption	15 W typical, 25 W maximum
Power Supply	50-300 VDC / 60-265 VAC, 48-62 Hz AC
Protection Functions	Thermal overload, overcurrent, locked rotor, ground fault, voltage and frequency protection
Current Inputs	1 A or 5 A CT configurable phase inputs
Communication Interface	RS485 / RS232 with Modbus RTU protocol
Display Interface	Red display faceplate
Environmental Protection	Harsh environment conformal coating

GE Multilin Motor Protection and Thermal Monitoring Functions

The 369-HI-R-M-0-0 integrates motor thermal modeling algorithms using current input, temperature information, and motor thermal history to calculate thermal capacity usage and trip conditions. Protection functions include ANSI 49 motor thermal overload, ANSI 50/51 instantaneous and time overcurrent, ANSI 51R/50P locked rotor and mechanical jam detection, ANSI 37/46 undercurrent and current unbalance monitoring, and ANSI 50G/51G ground fault protection.

The enhanced metering option provides measurement of phase current, ground current, current unbalance percentage, line-to-line voltage, line-to-neutral voltage, active power, reactive power, apparent power, power factor, energy values, thermal capacity percentage, time-to-trip, and time-to-reset.

Frequently Asked Questions

Q: What communication protocol is supported by the GE Multilin 369-HI-R-M-0-0?
A: The relay supports RS485 and RS232 serial communication interfaces with Modbus RTU protocol.

Q: What CT input configuration is supported for motor current measurement?
A: The relay supports configurable 1 A or 5 A secondary phase current transformer inputs.

Q: Does the conformal coating option affect environmental operation?
A: The conformal coating protects internal printed circuit boards against humidity, corrosive atmospheric contaminants, and harsh industrial environments.

Field Installation Guidelines

Install the relay inside a suitable protective enclosure with appropriate clearance for wiring access and heat dissipation. Connect phase current inputs using correctly rated CT secondary wiring and maintain proper polarity between CT terminals and relay inputs.

Use shielded communication cables for RS485 connections where required by site practices. Terminate cable shields according to the control panel grounding design to reduce electrical interference.

Separate low-level communication and signal wiring from high-current motor feeder conductors to minimize induced noise. Verify auxiliary contact assignments, digital input wiring, and trip circuits before energizing the protection system.

Confirm power supply compatibility with the selected HI power input range before commissioning. Perform functional verification of protection settings, current measurement scaling, and communication addressing after installation.

Specifications

• Brand: General Electric

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems