Description

GE Multilin 369-HI-R-0-0-0-E Motor Management Relay

The GE Multilin 369-HI-R-0-0-0-E, also cataloged as the 369 Motor Protection Relay, operates as a dedicated hardware component for three-phase motor protection, thermal monitoring, and electrical fault execution within industrial power control networks.

Hardware Specifications

Parameter	Specification
Model	369-HI-R-0-0-0-E
Brand	GE Multilin
Operating Temp	-40 deg C to +60 deg C
Power Consumption	10-20 W nominal, maximum 35 VA
Product Type	Motor Management Relay
Control Voltage	90-300 VDC / 70-265 VAC, 50/60 Hz
Current Inputs	1 A / 5 A CT inputs, software configurable
Ground Current Input	1 A / 5 A CT or 50:0.025 zero-sequence CT input
Digital Inputs	4 optically isolated dry contact inputs
Output Relays	4 relay outputs: Trip, Alarm, Auxiliary 1, Auxiliary 2
Contact Rating	10 A continuous, 30 A make for 0.2 s at 250 VAC / 30 VDC
Communication Ports	Dual RS485 rear ports
Communication Protocol	Modbus RTU
Baud Rate	1,200 to 19,200 bps
Environmental Coating	Conformal coating for corrosive gas, moisture, and dust protection

Firmware and Industrial Network Integration

The GE Multilin 369-HI-R-0-0-0-E supports deterministic serial communication through dual RS485 interfaces configured for redundant Modbus RTU connectivity. The relay exchanges motor protection status, metering values, event records, and diagnostic information with PLC, SCADA, and supervisory control systems.

The relay firmware provides configurable motor protection functions including thermal overload, short circuit, phase unbalance, undercurrent, mechanical jam detection, ground fault monitoring, and frequent start protection. Firmware compatibility shall be verified against the installed relay revision before replacement or configuration transfer.

Thermal modeling calculates motor thermal capacity utilization through current measurement, cooling rate parameters, and RTD feedback inputs where applicable. The stored event and fault recording functions capture trip conditions, alarms, and oscillography data for electrical fault analysis.

Frequently Asked Questions

Q: Does the GE Multilin 369-HI-R-0-0-0-E support hot-swap replacement?
A: The relay is not specified as a hot-swappable device. Replacement should be performed with control power removed and field wiring isolated according to electrical maintenance procedures.

Q: What communication interface is available for PLC or SCADA connection?
A: The relay provides two rear RS485 communication ports supporting Modbus RTU protocol for serial network integration.

Q: What type of motor current measurement inputs are supported?
A: The relay accepts standard 1 A or 5 A CT secondary inputs with software configuration, including ground current measurement through compatible CT configurations.

Field Installation Guidelines

Install the relay in a protected control cabinet with appropriate environmental separation from high-voltage switching equipment. Verify CT polarity, phase sequence, and secondary wiring before energization.

Use shielded communication cable for RS485 connections and terminate the shield according to the site grounding practice. Maintain separation between communication wiring, CT circuits, and high-current conductors to reduce electrical interference.

Confirm that the control voltage supply matches the specified AC/DC input range before connection. Ensure all protective earth and cabinet grounding points maintain low-impedance bonding.

Before commissioning, verify motor protection settings, CT ratios, digital input states, relay output assignments, and Modbus communication parameters through the configuration interface.

Specifications

• Brand: General Electric

Advantages

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