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GE 369-HI-R-M-0-0-0-E

Product Name:​ Multilin 369 Motor Management Relay
Product Introduction:​ The GE 369-HI-R-M-0-0-0-E is a flagship digital motor management relay from GE’s Multilin 369 series, designed for comprehensive protection, control, and monitoring of medium-voltage (typically 2.4 kV to 15 kV) and large low-voltage three-phase AC induction and synchronous motors. It replaces multiple discrete components (overload relays, protective relays, meters, contactors) with a single intelligent electronic device (IED).
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Detailed content

Suffix Code Breakdown:
  • HI: Human Interface (backlit LCD display with keypad)
  • R: Rear communication port
  • M: Metering package with integrated VT inputs
  • 0-0-0: Placeholder options (CT/VT ratings, I/O expansion, etc.)
  • E: Enhanced diagnostics package
Technical Specifications:
  • Control Power: 50–300 V DC / 40–265 V AC
  • Motor Voltage: Up to 15 kV (dependent on VT input)
  • Current Input: 1 A or 5 A secondary, configurable
  • Protection Functions: Thermal Overload (49), Short Circuit (50/51), Ground Fault (50N/51N), Unbalance (46), Undercurrent (37), Stall (48), Under/Overvoltage (27/59), Under/Overfrequency (81)
  • Digital Inputs: 8 programmable dry contact inputs
  • Relay Outputs: 6 programmable Form-C relay outputs (trip, alarm, control, etc.)
  • RTD Inputs: Up to 12 embedded RTD inputs for stator, bearing, and environmental temperature tracking
  • Metering: kW, kvar, kVA, PF, Hz, MWhrs, Phase Voltage
  • Communication: Front RS-232, 3× rear RS-485 (Modbus RTU); rear port supports Modbus RTU/Profibus DP or Ethernet (Modbus TCP)
  • Enhanced Diagnostics: Motor Health Report, Enhanced Event Recorder (up to 512 events), Oscillography (3 waveforms capturing 16 cycles), Start Data Logger
  • Environmental: Operating temperature -40 °C to +60 °C; Storage -40 °C to +80 °C
  • Standards: UL, cUL, CE, IEC 60255, IEEE C37.90
Key Features:​ Unique “learning” capability that adapts to individual motor parameters (surge current, cooling rates, acceleration times) to customize FlexCurve™ overload curves, preventing nuisance tripping while ensuring optimal protection; programmable logic (FlexLogic™) enabling 2-wire/3-wire control, auto-restart, and dual-speed control; comprehensive electrical metering eliminating the need for separate power meters.
Application Scenarios:​ Protection and control of three-phase medium-sized motors in industrial applications including pumps, compressors, fans, and other critical rotating equipment in power plants, oil & gas facilities, water treatment plants, and heavy industrial sites.
Working Principle:​ The relay receives real-time operational data through integrated current transformers (CTs), optional voltage transformers (VTs), and RTDs. It executes advanced protection algorithms and routes conditioned signals to trip breakers, trigger alarms, or communicate with plant SCADA systems. Its learning capability allows it to adapt to specific motor parameters, optimizing protection curves and providing predictive maintenance insights.
Installation Requirements:​ Pay extreme attention to physical placement and grounding. Connect CTs and VTs with correct polarity, ensure proper shielding of communication cables, and follow lock-out/tag-out procedures during installation. Configure via the front panel LCD/keypad or through communication ports using GE software.
Usage Notes:​ The “-E” suffix enhanced diagnostics package provides unprecedented visibility into motor health through oscillography, event logging, and pre-trip warnings. Pre-trip alerts allow maintenance teams to schedule interventions before catastrophic failures occur, drastically reducing MTTR.

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