GE 369-HI-R-M-0-0-H-E Multilin Motor Protection Relays

The GE Multilin 369-HI-R-M-0-0-H-E, also cataloged as the 369-HI-R-M-0-0-H-E Motor Protection Relay, serves as the primary 369 Motor Protection Relay utilized to execute comprehensive motor monitoring, thermal tracking, and electrical metering within harsh industrial control and power distribution environments.

Suffix Breakdown & Model Matrix

The 369 series utilizes explicit alphanumeric codes within its ordering matrix to define the integrated hardware options and functionality block baseline:

• 369: Core basic unit designator for the Motor Protection/Management Relay series.
• HI: Universal high-voltage control power supply block (50-300 VDC / 60-265 VAC).
• R: Optional 12 RTD inputs hardware module built directly into the chassis.
• M: Optional full electrical metering package module enabled.
• 0: Standard serial ports only; no optional Fiber Optic Port hardware installed.
• 0: Standard serial Modbus RTU interface; no optional protocol interfaces equipped.
• H: Harsh environment conformal coating option applied to internal circuit boards.
• E: Enhanced diagnostics functionality equipped with an enhanced faceplate.

Hardware Specifications

Industrial Control & Power System Specifications

• Backplane Bus Communication Velocity and Density Scaling The relay aggregates analog sensory parameters through its 12 built-in RTD channels and integrated metering package concurrently. It converts physical stator temperatures, line voltages, and phase currents into digital registers, executing local protection state calculations without introducing latency into the downstream programmable logic controller (PLC) or supervisory network.
• Profinet / EtherNet/IP Deterministic Networks and Firmware Flash Compatibility The internal processing layer maps power factor, power consumption (kW/kVA), and thermal capacity variables directly onto its serial Modbus registers. The firmware maintaining the motor's mathematical thermal replica models runs continuously alongside discrete trip logic, ensuring deterministic output relay contact execution under severe overload or unbalance conditions.

Frequently Asked Questions

Q: What specific protection does the "H" harsh environment option provide for the relay?

A: The "H" suffix indicates that the internal printed circuit boards (PCBs) have been treated with a specialized conformal coating. This protective layer shields the sensitive digital electronics from airborne contaminants, moisture, dust, and corrosive gases (such as hydrogen sulfide) common in chemical, oil, and gas facilities.

Q: What specific data variables are added to the system registers by the "M" metering package suffix?

A: The "M" option installs the hardware instrumentation components required to calculate three-phase electrical power parameters. It monitors real-time bus voltage, active/reactive/apparent power metrics (kW/kVar/kVA), frequency variations, and power factor variables alongside the standard phase current protection functions.

Field Installation Guidelines

• Chassis Alignment, Drawout Seating, and Enclosure Mounting Cut out the panel door to match the vertical layout of the 369 drawout case. Guide the main relay case straight through the opening until the flange seats flush against the panel face, then tighten the rear mounting bracket clamps to lock the assembly against heavy structural switchgear vibrations.
• Signal Routing, Noise Suppression, and Shield Grounding Blocks Route the low-voltage RTD inputs and serial data links through dedicated grounded wireways separate from heavy three-phase motor leads. Terminate all shielded twisted-pair drain wires directly at the central protective earth ground bus terminal to suppress induced radio frequency or electromagnetic interference.