GE Multilin 369-HI-R-M-0-0-E Motor Management Relay

The GE Multilin 369-HI-R-M-0-0-E, also cataloged as the 369 Motor Management Relay, operates as a dedicated hardware component for comprehensive motor protection and real-time current/voltage monitoring within industrial motor control platforms.

Suffix Breakdown & Model Matrix

• 369: Basic motor management unit base architecture.
• HI: Standard high control power supply rated for 50-300 VDC / 60-265 VAC.
• R: Integrated optional 12 RTD inputs built-in for thermal stator/bearing monitoring.
• M: Optional full metering package enabled for active/reactive power metrics.
• 0: Standard option with no optional Fiber Optic serial port installed.
• 0: Standard option with no optional protocol expansion interface board installed.
• 0: Standard non-conformal coating build without harsh environment protection.
• E: Enhanced diagnostic module with enhanced front panel user interface display.

Hardware Specifications

Backplane Bus Communication and Firmic Determinism

• Deterministic Communication Execution: Processing internal protective algorithms and backplane register updates within millisecond response times to prevent thermal damage to medium-voltage motors.
• Firmware Flash Compatibility: Maintains standardized register mappings across internal firmware revisions to support field-upgradable execution via front-panel serial diagnostic ports.
• RTD Signal Conditioning: Direct connection of 12 RTD temperature sensors provides analog acquisition to monitor stator winding, bearing, and ambient temperature rises.

Frequently Asked Questions

Q: What power source is required to operate the 369-HI-R-M-0-0-E relay?

A: The HI power supply module supports a wide input voltage range of 50 to 300 VDC or 60 to 265 VAC.

Q: Can the 12 built-in RTD inputs be configured for different RTD sensor types?

A: Yes, the 12 internal RTD channels support configurable sensor curves (such as 100 Ohm Platinum, 120 Ohm Nickel, or 10 Ohm Copper) via the system configuration software.

Q: How does the unit maintain operational logs during primary power disruption?

A: Diagnostic event records and non-volatile configuration memory are preserved indefinitely using onboard flash memory hardware independent of control power status.

Field Installation Guidelines

• Cutout and Panel Mounting: Insert the relay into the panel cutout and tighten rear mounting collar bolts evenly to securely ground the steel chassis to the enclosure frame.
• CT and RTD Shielded Wiring: Route current transformer secondary leads and 3-wire RTD signal lines using shielded twisted-pair conductors. Keep low-voltage RTD wiring isolated from power distribution lines.
• Single-Point Grounding: Terminate overall cable shields at a single point on the main enclosure ground bar. Do not ground RTD shields at the motor terminal box to avoid ground loop current interference.