Description

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

The GE Multilin 369-HI-R-M-0-P-0-E, also cataloged as the 369 Motor Protection Relay, operates as a dedicated hardware component for three-phase motor protection, thermal monitoring, metering, and diagnostic execution within GE Multilin 369 motor protection systems.

Hardware Specifications

Parameter	Specification
Model	369-HI-R-M-0-P-0-E
Brand	GE Multilin / General Electric
Origin	United States
Operating Temp	-40 deg C to +60 deg C
Power Consumption	Not specified in available documentation
Control Power Supply	90-300 VDC / 70-265 VAC, 50/60 Hz
Phase Current Inputs	1 A or 5 A secondary CT inputs, field selectable
Ground Current Inputs	1 A / 5 A CT or 50:0.025 zero-sequence CT
Voltage Inputs	Up to 600 VAC direct input or VT ratio configuration
Frequency Range	20 to 70 Hz
RTD Inputs	12 RTD inputs
Protection Functions	Thermal overload, phase overcurrent, ground fault, undercurrent, voltage protection, stall and acceleration protection
Enclosure Protection	NEMA 12 / IP54 front panel
Environmental Protection	Conformal coated PCB construction

GE Multilin 369 Thermal Model and Motor Monitoring Functions

The GE Multilin 369 series uses a dynamic thermal model with motor thermal capacity utilization (TCU) calculation for overload protection. The relay processes current imbalance, ambient temperature compensation, and motor operating conditions to calculate thermal stress during startup and running states.

The relay supports motor condition evaluation through real-time electrical measurement including voltage, current, frequency, power, energy, and power factor values. Optional metering functions provide additional operational data acquisition for motor load analysis.

The protection logic includes instantaneous and timed phase overcurrent elements, sensitive ground fault detection through residual or core balance CT connections, undercurrent monitoring for loss-of-load conditions, and stall protection for locked rotor or mechanical jam conditions.

Frequently Asked Questions

Q: Does the 369-HI-R-M-0-P-0-E support remote display operation?
A: Yes. The R suffix indicates a remote display configuration with enhanced faceplate interface and keypad functionality.

Q: What current transformer inputs are supported by this relay?
A: The relay accepts field-selectable 1 A or 5 A secondary phase CT inputs and supports ground CT configurations including zero-sequence CT connections.

Q: Can the relay communicate through industrial protocols?
A: The 369 platform supports optional communication interfaces, including PROFIBUS-DP protocol options depending on installed configuration.

Field Installation Guidelines

Install the relay in a compatible protective relay enclosure with suitable ventilation and environmental control. Verify control power polarity and voltage range before energizing the unit.

Terminate CT wiring according to protection relay installation practices. Maintain proper polarity between current transformers and relay input terminals. Use shielded wiring for low-level measurement and communication circuits, with cable shields grounded according to site grounding procedures.

Separate power conductors from signal wiring to reduce electrical noise coupling. Verify RTD wiring continuity and sensor identification before commissioning. Confirm relay configuration parameters, motor ratings, CT ratios, and protection thresholds before placing the motor circuit into service.

Specifications

• Brand: General Electric

Advantages

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