Description
Model: 369-HI-0-M-0-0-0-E
· Brand: GE Multilin (Grid Solutions)
· Series: 369 Motor Management Relay
· Core Function: 🛡️ High-performance motor protection, monitoring, and thermal modeling
· Product Type: 📟 Digital Protective Relay
· Key Specs: 🛠️ High-voltage power supply, draw-out design, RTD sensing, Ethernet/Modbus
- Control Power: HI (High-range 100-240 V AC/DC)
- CT Input: 0 (Standard 1 A / 5 A Phase CT)
- Communication: M (Modbus RTU RS-485 + Ethernet 10BaseT)
- Analog Outputs: 0 (No extra analog outputs)
- RTD Inputs: 0 (Standard 12 RTD input capacity)
- Digital I/O: 0 (Standard I/O configuration)
- Frequency: E (50/60 Hz operation)
- Programming Software: EnerVista 369 Setup
Application Scenarios & Engineering Insights
This specific part number (the “HI” and “M” suffix) denotes a unit equipped for both high-voltage control power and Ethernet connectivity, making it common in modern integrated plant SCADA systems. When replacing this model, the Ethernet configuration is the most frequent “gotcha.” Unlike simple serial Modbus, the IP settings must match the plant’s gateway and subnet mask exactly, or the relay will be “invisible” on the network.
Typical Use Cases:
- Industrial Manufacturing – Pumping Systems
Monitoring motor windings in critical fluid transfer systems where remote SCADA data is required.
- Energy – Large Compressor Drives
Utilizing the thermal modeling to prevent motor damage during high-inertia starting sequences.
- Mining – Conveyor Networks
Providing detailed diagnostic logs to identify “nuisance trip” patterns before a catastrophic failure occurs.
Troubleshooting Pro-Tip:
Before pulling a unit with an “M” (Ethernet) suffix, verify if the Ethernet port is currently in use. If you replace the unit and forget to set the new device’s static IP address in the EnerVista software, your SCADA system will lose communication immediately upon power-up.
Compatible Replacement Models
| Original Model | Replacement | Compatibility | Difference |
| 369-HI-0-M-0-0-0-E | 369-HI-0-0-0-0-0-E | ✅ Software | Requires Ethernet removal from system map |
| 369-HI-0-M-0-0-0-E | 369-HI-1-M-0-0-0-E | ✅ Direct | CT input difference (verify current transformer ratio) |
| 369-HI-0-M-0-0-0-E | GE 869 Series | ⚠️ Migration | Superior logic; requires engineering re-design |
Note: If the exact “M” suffix (Ethernet) unit is unavailable, you can technically use a base unit and add an external serial-to-ethernet gateway, though this complicates cabinet wiring and setup.
Troubleshooting Quick Reference
| Symptom | Probable Cause | Action |
| Ethernet Link LED Off | Network config or cable fault | Check Cat5 connection and switch port status |
| “Thermal Memory” Trip | Overload history mismatch | Recalibrate thermal model in EnerVista |
| RTD “Short Circuit” Alert | Sensor wire ground fault | Check lead continuity and insulation resistance |
| Relay Rebooting | Supply voltage drop | Check for loose control power connections |
Safety Warning: When servicing the 369-HI (High-Voltage) variant, ensure the control power source is properly fused at the cabinet level. These units draw power directly from the station battery/control bus, and a short at the relay terminals can trip the entire control power distribution system.
