Description
Key Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 369-HI-R-M-0-0-0-E |
| Manufacturer | GE Multilin |
| Product Type | Motor Management Relay |
| Current Input | HI Range: 1–100A AC Direct Connect (Rogowski Coil) |
| RTD Inputs | 12 Embedded (R, M Option) |
| Control Power | 24–240V AC/DC Wide Range |
| Communication | RS485 Modbus RTU (Standard) |
| Protection Functions | Overcurrent, Ground Fault, Thermal, Phase Unbalance |
| Operating Temp | -40°C to +85°C |
| Dimensions | 11cm (W) x 30cm (H) x 21cm (D) |
| Configuration Tool | EnerVista 369 Setup Software |
| Diagnostics | Motor Health Report, Start Data Recorder, Waveform Capture |
Product Introduction
Motor burnouts in critical pumps and compressors rarely happen instantly; they scream for help in thermal and vibration data long before the smoke appears. The GE 369-HI-R-M-0-0-0-E was built to listen to those screams. Unlike basic overload relays that just trip on current, this module uses an adaptive algorithm to “learn” your motor’s thermal capacity and mechanical signature. The HI designation means it handles up to 100A directly via internal Rogowski coils, eliminating the need for external CTs and saving panel space.
Engineers value the GE 369-HI-R-M-0-0-0-E because of the R and M option codes. R gives you 12 embedded RTD inputs for bearing and stator temperature monitoring without external modules. M adds the advanced measurement package, including waveform capture and a start data recorder. This isn’t just protection; it’s a diagnostic tool that tells you why the motor tripped, not just that it tripped. Bottom line — if you’re running a 400HP motor and can’t afford a rewind, this relay pays for itself in one prevented failure. Just make sure your EnerVista software version matches the firmware.
QA/QC Transparency SOP
We don’t trust “tested working” labels. Here is the actual process for a GE 369-HI-R-M-0-0-0-E:
- Intake & Origin Verification: We verify the GE Multilin date code and check the option codes on the label. The R-M combo is specific; we confirm the internal RTD circuitry matches the label to prevent “missing channel” surprises.
- Live Functional Testing: Module goes on a motor simulator test bench. We inject 100A primary current and verify the Rogowski coil accuracy across the full range. We also trigger a thermal overload to confirm the trip curve matches the IEC/ANSI settings.
- Electrical Parameter Tests: Fluke 117 checks the 24-240V power supply rails. We verify the RS485 termination and signal integrity. A bad comm chip is a common failure point; we catch it here.
- Firmware/Config Verification: We read the EEPROM via the front RS232 port. If the firmware is corrupted or mismatched for the R-M hardware, we reflash or quarantine. You get the exact rev you ordered.
- Final QC & Anti-Static Packaging: Inspect the front panel LEDs and keypad for stuck buttons. Bagged in ESD shielding. No loose hardware. We include a test report showing the actual trip time at 6x FLA.
Field Engineer Gotchas
- Rogowski Coil Orientation: The HI version uses internal coils, but the external CT inputs (if used for ground fault) are polarity-sensitive. Risk: Reversing the ground CT polarity will cause the relay to not trip on ground faults or trip on normal load. Fix: Verify the P1/P2 markings on the external CTs. I’ve seen a $10k motor fry because a tech wired the ground CT backwards.
- RTD Wiring: The R option provides 12 RTD inputs, but they share a common return. Warning: If you wire a 3-wire RTD as a 2-wire, you’ll get a false high-temp alarm. Always verify the RTD type (100Ω Pt, 120Ω Ni, etc.) in EnerVista. The relay doesn’t auto-detect.
- EnerVista Version Mismatch: The 369-HI-R-M-0-0-0-E has multiple firmware revisions. War Story: Saw a tech use EnerVista 6.0 on a relay with v4.2 firmware. The software crashed and corrupted the relay’s config. Always check the firmware version on the relay’s front panel before connecting.
- Thermal Capacity Reset: After a trip, the thermal capacity doesn’t reset instantly. Blunt Truth: If you keep trying to restart a hot motor, the relay will lock you out. Don’t bypass the thermal model. Let it cool, or you’re just cooking the insulation.
GE 369-HI-R-M-0-0-0-E
Application Scenarios
- Large HVAC Chillers: 200-400HP motors that cycle frequently. The GE 369-HI-R-M-0-0-0-E tracks the accumulated thermal stress from repeated starts, preventing insulation breakdown from “start heating.”
- Mining Conveyor Drives: High-inertia loads with long start times. The start data recorder captures the exact current/time profile, helping engineers tune the VFD ramp or identify mechanical binding.
- Water Treatment Pumps: Submersible motors with embedded RTDs. The 12-channel RTD input monitors stator windings directly, catching insulation failures before they cause a ground fault.
FAQ
Q: Can I use this for a 5A secondary CT application?
A: No. The HI in 369-HI-R-M-0-0-0-E means 1-100A direct connect. For 5A CT inputs, you need the LO version (e.g., 369-LO-R-M-0-0-0-E). Don’t try to pass 5A through the HI terminals; you’ll damage the internal shunt.
Q: Does this support Ethernet?
A: Not natively. The 369-HI-R-M-0-0-0-E has RS485 Modbus RTU standard. For Ethernet, you need the optional E suffix (e.g., 369-HI-R-M-0-0-0-E-E) or an external protocol gateway. Check the label for the E code.
Q: My relay says “RTD Fail.” How do I fix it?
A: Check the RTD wiring and type setting. The R option supports 100Ω Pt, 100Ω Ni, 120Ω Ni, and 10Ω Cu. If you have a 1000Ω Pt RTD, the relay will fault. Verify the RTD resistance with a multimeter and match it to the EnerVista config.
Q: Can I hot-swap this relay?
A: Absolutely not. The 369 is not designed for hot-swap. Removing it under load will arc the current-carrying terminals and likely destroy the Rogowski coil. Plan a motor shutdown.
Q: What is the “M” option?
A: M stands for Measurement Package. It adds the start data recorder, waveform capture, and enhanced event logging. Without M, you only get basic protection and metering. For predictive maintenance, M is mandatory.
Q: Is this compatible with the 350 relay?
A: No. The 369 and 350 have different form factors, backplane connectors, and software. They are not drop-in replacements. If you’re upgrading from a 350, expect to rewire and reprogram.
Q: How do I backup the configuration?
A: Use EnerVista 369 Setup Software via the front RS232 port. Always save a .369 file before making changes. I’ve seen techs lose 4 hours of tuning because they didn’t backup first.
