GE 369-HI-0-M-0-0 Motor Management Relay

Description

In plants where a single medium-voltage motor trip can cost six figures per hour or compromise an entire process train, engineers no longer accept basic thermal overload relays that leave you guessing whether the fault was real overload, phase imbalance, or an impending bearing failure. The hidden cost of traditional protection is the blind spot: you react only after damage has already started, and you still face lengthy forensic analysis to satisfy insurance or root-cause requirements. This is exactly the gap the GE 369-HI-0-M-0-0 closes. As a full-featured motor management relay from the proven 369 family, the GE 369-HI-0-M-0-0 delivers complete thermal modeling (49/51), true RMS phase and ground-fault protection, and detailed pre- and post-fault diagnostics for medium-voltage motors from 200 HP up to several thousand horsepower. With built-in RTD monitoring, under-power detection, and a 40-event recorder time-stamped to the millisecond, it transforms a motor from an opaque black box into a fully instrumented asset that warns you weeks before a forced outage becomes inevitable.

The GE 369-HI-0-M-0-0 mounts in the switchgear door or on a separate panel and connects directly to your 1 A or 5 A CT secondaries plus optional RTD inputs from the motor windings and bearings. It communicates natively via Modbus RTU on two independent RS485 ports and can be dropped into DeviceNet or Profibus networks with a simple option change. Configuration is done through the intuitive front keypad and large backlit LCD or via the free EnerVista 369 Setup software that ships with every unit. Protection curves follow IEC 60255 standards with user-definable K-factors and cooling time constants, so the thermal model matches your exact motor data sheet instead of relying on generic Class 10/20/30 approximations. On-board logic inputs and output contacts let you integrate starts-per-hour limiting, emergency restart overrides, and remote trip/reset without adding external timers or auxiliary relays.

Choosing the GE 369-HI-0-M-0-0 means you finally have visibility into motor health that used to require expensive online monitoring systems. The learned acceleration time, running current histogram, and load-averaged thermal capacity trending give maintenance teams objective data to schedule bearing replacements or coupling inspections before catastrophic failure occurs. In regulated industries, the event recorder and waveform capture eliminate arguments with insurers about whether proper protection was in place. Many sites report extending average motor life by 30–40 % simply because the relay forces disciplined start/stop practices and flags chronic overload conditions early.

You’ll find the GE 369-HI-0-M-0-0 protecting induced-draft fans and boiler-feed pumps in fossil and combined-cycle power plants, driving compressors on offshore platforms and LNG refrigeration trains, and guarding extruder and pelletizer motors in polymer plants where a single unplanned trip wipes out an entire shift’s production. It’s equally common on critical water-injection pumps in oil fields and on mine hoist motors where safety-case documentation demands detailed fault records.

369-HI-R-M-0-0 – Adds 12 RTD inputs for stator + bearing monitoring

369-HI-0-M-F-0 – Includes 50 mA sensitive earth-fault core-balance input

369-LO-0-M-0-0 – 24–48 V DC low-voltage control power version

369-HI-0-0-0-0-E – Enhanced faceplate with larger LCD and USB port

369-HI-R-M-0-D-0 – DeviceNet communications instead of Modbus

SR469 – Next-generation 469 relay when moving to newer switchgear

MM300 – Compact alternative for low-voltage motors under 600 V

Before commissioning a GE 369-HI-0-M-0-0, verify CT ratios match the motor FLA within 5 % and that polarity is correct — a reversed phase CT is the most common cause of nuisance ground-fault trips. Use shielded twisted-pair for RTD wiring and terminate shields only at the relay end. Enter the motor data-sheet values exactly (service factor, locked-rotor current, hot/cold safe stall times) so the thermal model is accurate from day one. Annual verification is straightforward: inject secondary current at 1.0 and 1.2 × FLA while monitoring used thermal capacity on the display; the relay should track within 2 %. Most plants simply download the event log and trend data during each outage and never touch the settings again.