Description
Key Technical Specifications
| Parameter | Value |
| Device Type | Microprocessor-Based Motor Management Relay |
| System Compatibility | Medium-voltage industrial AC induction motors |
| Control Power Supply | High-range (HI) AC/DC auxiliary power input |
| Current Inputs | 5 A secondary phase CT inputs, 1 A / 5 A ground CT options |
| Temperature Inputs | Multiple RTD inputs for stator, bearing, and ambient tracking |
| Communication Protocols | Modbus RTU, DNP 3.0 via RS-485; optional Ethernet gateways |
| Output Relays | Trip, Alarm, Auxiliary, and auxiliary/trip Form C contacts |
| Enclosure / Mounting | Drawout case design for panel flush cutout mounting |
| Metering | True RMS current, voltage, power, frequency, and thermal capacity logging |
Product Introduction
Advanced Motor Protection for Critical Industrial Drives
The GE Multilin 369-HI-R-M-0-P1-0-E operates as a dedicated digital protection and management relay engineered to safeguard medium-voltage AC induction motors. It integrates thermal model calculations, phase-imbalance protection, locked-rotor detection, and bearing temperature monitoring into a single enclosure, preventing catastrophic mechanical and electrical motor failures.
Engineered for rigorous industrial electrical rooms, this relay provides precise data logging and event recording to assist engineers in post-trip root-cause analysis. Deploying an OEM surplus 369 unit ensures exact panel cut-out compatibility and rapid restoration of motor control circuits.
369-HI-R-M-0-P1-0-E
Application Scenarios & Field Pitfalls (The Engineer’s Perspective)
An unmonitored stator overload or severe bearing temperature spike on a primary boiler feed pump motor can warp shafts and melt winding insulation within seconds, causing massive financial losses. Plant electrical engineers rely on advanced motor management relays to track real-time thermal capacity and trip safely before permanent damage occurs.
- Oil & Gas: High-horsepower compressor and export pump motor protection in downstream refineries.
- Power Generation: Large auxiliary draft fan and condensate pump motor drives within utility power plants.
- Mining & Metals: Heavy-duty grinding mill and slurry transport pump motor management systems.
- CT Polarity and Ratio Mismatch: Incorrect phase or ground Current Transformer (CT) polarity wiring corrupts the internal thermal model and differential calculations, causing nuisance trips or failure to trip during a true fault. Verify CT ratios and dot orientations during commissioning.
- RTD Lead Resistance Calibration: When connecting 2-wire or 3-wire RTD temperature sensors for bearing and stator monitoring, failing to balance or calibrate lead resistance properly skews temperature readouts and triggers false thermal alarms.
- Communication Baud Rate Alignment: Ensure the RS-485 serial communication baud rate and Modbus address match plant SCADA highway parameters prior to energizing, otherwise the relay will drop off the supervisory network.
Related Products
- GE Multilin 369-LO-R-M-0-P1-0-E: Low-range control power variant of the 369 motor management relay platform.
- GE Multilin 469-P5-HI-A20: Advanced motor protection relay designed for larger, more complex medium-to-high voltage motor systems.
- GE Multilin 745: Transformer management relay utilizing similar hardware styling and EnerVista software architecture.
- GE Multilin EnerVista 369 Setup Software: The required configuration and oscillography analysis software package for programming the relay.
- GE Multilin 369 Drawout Case Replacement: Spare mounting chassis and housing assembly for 369 relay inserts.
- Phoenix Contact MCR Signal Conditioners: Analog isolation modules frequently paired with RTD inputs in high-noise electrical rooms.
- Belden 9841 RS-485 Communication Cable: Shielded twisted-pair cable standard for wiring 369 serial networks to plant DCS systems.
- GE Multilin F650: Digital feeder protection and bay controller system used in adjacent switchgear cubicles.
