GE Multilin 369-HI-R-0-0-0-0-E – Motor Management Relay | 369 Series Platform
Engineering Background
The GE Multilin 369 Motor Management Relay is engineered for comprehensive protection and management of medium-voltage and low-voltage AC induction motors in demanding industrial environments. Developed on GE’s proven 369 Series platform, this relay integrates multi-function protection, metering, and diagnostics into a single compact unit, reducing panel space and wiring complexity while elevating system reliability.
Product Positioning
The 369-HI-R-0-0-0-0-E variant is configured with a high-impedance (HI) input module and rear-mount (R) chassis, making it the preferred choice for retrofit installations and new panel builds where high-sensitivity ground fault detection and robust motor lifecycle management are required. It is widely deployed in oil & gas, mining, water treatment, pulp & paper, and heavy manufacturing sectors.
Complete Technical Specifications
- Manufacturer: GE Multilin (General Electric)
- Model / SKU: 369-HI-R-0-0-0-0-E
- Series: 369 Motor Management Relay
- Input Module: HI – High-Impedance Ground CT Input
- Mounting: R – Rear-mount (panel flush mount)
- Communication: None (base model, no optional comm card)
- Power Supply: Standard AC/DC auxiliary power (per GE 369 datasheet)
- Current Inputs: 3-phase + ground (CT secondary: 1A or 5A selectable)
- Voltage Inputs: Optional VT inputs for voltage-based protection elements
- Protection Functions: Thermal overload, phase overcurrent (50/51), ground fault (50G/51G), undercurrent, phase unbalance/reversal, locked rotor, stall, RTD-based thermal protection (optional), starts-per-hour, restart inhibit
- Metering: RMS current (3-phase + ground), thermal capacity used, motor load, start counter
- Output Relays: Multiple programmable trip and alarm output contacts
- Display: Front-panel LED indicators + alphanumeric display
- Approvals: UL, CSA, CE
- Operating Temperature: -20°C to +60°C
- Weight: 3.56 kg
- Dimensions: Standard 369 Series panel-mount form factor
Proven Application Environments
- Oil & Gas: Pump motors, compressor drives, wellhead equipment
- Mining: Conveyor drives, crusher motors, ventilation fans
- Water & Wastewater: Submersible pumps, aerator motors, lift station drives
- Pulp & Paper: Refiner motors, chip conveyor drives
- Heavy Manufacturing: Press drives, extruder motors, HVAC fan motors
- Power Generation: Auxiliary motor protection in generating stations
Engineering Advantages
- High-Impedance Ground Fault Sensitivity: The HI input module enables detection of very low-level ground faults (sub-milliamp range) that standard CT inputs cannot resolve — critical for high-resistance grounded systems.
- Thermal Model Accuracy: Adaptive thermal memory tracks motor heating across start cycles, preventing nuisance trips while protecting against true thermal damage.
- Integrated Motor Diagnostics: Start data logging, thermal capacity trending, and event recording reduce unplanned downtime and support predictive maintenance programs.
- Flexible Relay Outputs: Programmable trip/alarm contacts allow integration with existing SCADA, DCS, and PLC architectures without additional interface hardware.
- Compact Rear-Mount Design: The R-chassis simplifies panel retrofits and reduces front-of-panel depth requirements.
System Architecture & Signal Flow
The 369-HI-R-0-0-0-0-E sits at the protection layer between the motor control center (MCC) and the motor terminal box. Phase CTs feed 3-phase RMS current to the relay’s analog input module. The high-impedance ground CT input monitors zero-sequence current with high sensitivity. The relay’s onboard DSP continuously evaluates all protection elements in parallel. On a trip condition, the programmable output contacts open the upstream contactor or circuit breaker, isolating the motor. Alarm contacts simultaneously signal the DCS/SCADA system. All event data is time-stamped and stored in non-volatile memory for post-fault analysis.
Sourcing & Quality Verification
- All units sourced through verified industrial automation supply channels.
- Each relay undergoes visual inspection, label verification, and functional pre-shipment check.
- Original GE Multilin firmware and factory calibration preserved — no third-party modifications.
- Packaging integrity inspected prior to dispatch; units shipped in anti-static, padded enclosures.
- Traceability documentation available upon request for regulated industries.
Procurement Process
- Confirm part number 369-HI-R-0-0-0-0-E matches your system’s CT ratio, auxiliary power supply voltage, and mounting requirements.
- Submit your order via Konmask.com or contact support@konmask.com for volume pricing or expedited lead times.
- Receive order confirmation with estimated dispatch date within 1 business day.
- Unit ships with packing list and available documentation; installation manual available on request.
- Post-delivery technical support available via email or phone.
Technical FAQ
Q: What is the difference between the HI and standard ground input on the 369?
A: The HI (high-impedance) input is designed for use with high-impedance grounded systems and specialty zero-sequence CTs, providing sensitivity down to very low ground fault currents. The standard input is suited for solidly or low-impedance grounded systems with conventional residual or core-balance CTs.
Q: Can the 369-HI-R-0-0-0-0-E be upgraded with a communication module?
A: The base model (0-0-0-0-E) does not include a communication card. GE Multilin offers optional Modbus RTU, DeviceNet, and Profibus communication modules for the 369 platform — contact us to confirm retrofit availability for your specific unit.
Q: Is this relay compatible with 1A and 5A CT secondaries?
A: Yes. The 369 Series supports both 1A and 5A CT secondary inputs, selectable via front-panel configuration.
Q: What auxiliary power supply voltage does this unit require?
A: The -E suffix denotes the standard AC/DC auxiliary power supply option. Please verify your panel supply voltage against the GE 369 datasheet or contact us for confirmation before ordering.
Q: Do you provide a warranty?
A: Yes. All units sold through Konmask.com carry a standard warranty. Contact support@konmask.com for warranty terms applicable to your order.
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