Product Core Brief

• Model: 369-HI-R-M-0-0-H-E
• Brand: GE Multilin
• Series: Multilin 369 Motor Management Relay
• Core Function: Full-featured digital protection, metering, and thermal monitoring for three-phase AC motors with conformal coating and enhanced diagnostics.
• Product Type: Motor Management Relay
• Key Specs: HI control power 50–300 VDC / 40–265 VAC | 12 RTD inputs | Metering package | Conformal coating + Enhanced diagnostics (H, E)
• Condition: New Original / New Surplus (subject to available stock)

Key Technical Specifications

• Part Number: 369-HI-R-M-0-0-H-E
• Product Type: Digital Motor Management Relay
• Control Power (HI): 50–300 VDC / 40–265 VAC, 50/60 Hz
• Power Consumption: Nominal 20 VA, Max 65 VA
• Phase Current Input: Via external CTs, 1 A or 5 A secondary
• Ground Fault Input: Dedicated ground CT input
• RTD Inputs: 12 channels (Pt100, Ni100, Ni120, Cu10 compatible)
• Metering Package: Voltage, kW, kVAR, kVA, PF, Hz, MWh
• Analog Outputs: Up to 4 (1 standard + 3 with metering option)
• Communication: RS-485 (Modbus RTU), front-panel RS-232
• Enhanced Diagnostics (E): Motor health report, start data logger, enhanced event recorder
• Conformal Coating (H): Protective polymer film for harsh environments
• Display: 40-character alphanumeric LCD with status LEDs
• Operating Temperature: -40°C to +60°C
• Enclosure Rating: IP50, panel/door mount
• Configuration Software: EnerVista 369

Product Introduction (No Fluff)

The GE Multilin 369-HI-R-M-0-0-H-E is the most fully-optioned build in the 369 lineup. It combines wide-range control power, 12 RTD temperature inputs, a full metering package, conformal coating, and enhanced diagnostics into one panel-mounted relay. This configuration is typically specified for critical motors where thermal monitoring, energy metering, and environmental resilience are non-negotiable.

Unlike stripped-down variants, this unit gives you stator and bearing temperature tracking, voltage and power metering, and an enhanced event recorder that captures up to 512 time-stamped events. The conformal coating shields the PCB from humidity, dust, and corrosive atmospheres—making it a strong choice for wastewater plants, chemical processing, or coastal installations.

QA & Testing SOP (Dynamic & Transparent)

This is a premium surplus relay with multiple hardware options. We verify each one before shipping:

1. Full Part Number & Firmware Verification: Confirm the rear label reads 369-HI-R-M-0-0-H-E exactly. Power up and log the firmware revision from the front-panel menu.
2. Self-Test & Diagnostic Check: Run the relay’s built-in self-test. Verify no stored watchdog errors, EEPROM faults, or service LED warnings.
3. Control Power Burn-In: Apply HI-range control power and let the unit stabilize. Confirm the display boots cleanly and all status LEDs illuminate correctly.
4. RTD Channel Verification: Inject a known resistance (e.g., 100 Ω Pt100 simulator) into multiple RTD channels. Confirm the relay reads temperature accurately across all 12 inputs.
5. CT & Metering Validation: Inject a known secondary current and voltage through the CT and VT inputs. Verify that displayed current, voltage, kW, and PF values match the test set.
6. Communication & Packaging: Test RS-485 Modbus RTU communication. Confirm register reads match displayed values. Pack in anti-static bags with foam cushioning.

Installation Pitfalls & Guide (Engineer to Engineer)

RTD wiring must be 3-wire shielded. Unshielded or 2-wire RTD runs will pick up noise and cause false temperature trips. Ground the shield at the relay end only.

Metering package requires VT connections. If you skip the voltage transformer wiring, the metering functions (kW, kVAR, PF) will read zero or fault. Verify VT ratios match the relay settings.

Conformal coating is not a waterproof seal. The H option protects the PCB from humidity and corrosion, but the enclosure itself is only IP50. Keep the panel door closed and sealed.

CT polarity still matters. Even with all the advanced features, reversed CT wiring on any phase will cause incorrect unbalance readings and nuisance trips.

Replacement Steps:

1. Pre-install: Verify the full model code, back up existing settings via EnerVista 369, and prepare LOTO.
2. Removal: Label all CT, VT, RTD, DI/DO, and communication wires. Remove terminal blocks and unmount the relay.
3. Install: Mount the new unit, reconnect wiring per the label diagram, and verify CT polarity, RTD shielding, and VT ratios.
4. Power-on Test: Apply control power, load the saved settings, inject test signals, and confirm trip/alarm outputs before returning the motor to service.

Technical FAQ

1. What does the “H” and “E” suffix add? The “H” option adds conformal coating—a protective polymer film on the PCB that resists humidity, dust, and corrosive atmospheres. The “E” option adds enhanced diagnostics: an upgraded front panel with motor status indicators, a motor health report, enhanced learning data, a motor start data logger, an enhanced event recorder (up to 512 events), and a security audit trail.

2. How many RTD sensors can this relay monitor? Twelve. The “R” option provides 12 built-in RTD inputs that support Pt100, Ni100, Ni120, and Cu10 sensors. These can be distributed across stator windings, bearings, and ambient temperature monitoring.

3. Can I add the metering package or RTD inputs in the field? No. GE Multilin requires these options to be factory-installed as hardware modules. Field modifications void the warranty. If you need additional options later, you would need a different model.

4. Is the 369 series still in production? Manufacturing of the 369 series has been discontinued by GE Vernova. The recommended replacement platform is the GE Multilin 859, which maintains the same panel cutout and terminal arrangement for direct replacement. Surplus 369 units remain a practical option for like-for-like replacements where re-engineering is not feasible.

5. What warranty do you offer on surplus stock? Terms vary by condition and availability. For surplus industrial relays, we typically provide a short functional guarantee. Confirm details at time of order.