GE 369-HI-0-M-0-0-0

At a liquefied natural gas (LNG) export terminal in Qatar, a 12 MW refrigeration compressor motor suffered repeated thermal trips due to undetected phase imbalance—a condition legacy relays failed to diagnose. After installing the GE 369-HI-0-M-0-0-0. engineers leveraged its built-in RTD-based thermal overload protection and negative-sequence current monitoring to identify a failing stator winding weeks before catastrophic failure. The relay triggered a controlled shutdown, avoiding an estimated $ 4M in repair costs and 14 days of production loss. This case exemplifies how the 369-HI-0-M-0-0-0 transforms reactive maintenance into predictive asset management—keeping critical motors running safely and efficiently.

Main Parameters Value/Description

Product Model 369-HI-0-M-0-0-0

Manufacturer GE Vernova (formerly GE Grid Solutions / Multilin)

Product Category Multifunction Motor Protection Relay

Motor Voltage Range Suitable for LV (≤1 kV) and MV (up to 15 kV with external PTs) applications

Current Inputs 3-phase CT inputs (1 A or 5 A selectable); supports ground fault via residual or core-balance CT

Protection Functions Thermal overload (IEC 60255-149 compliant), phase unbalance, stall/jam, undercurrent, overcurrent (phase & ground), RTD supervision

RTD Inputs 8 dedicated RTD channels (Pt100. Ni120. Cu10)—for direct stator/winding/bearing temperature monitoring

Communication Interfaces RS485 (Modbus RTU), optional Ethernet (IEC 61850. DNP3. Modbus TCP)

Metering Capabilities Voltage, current, kW, kVAR, power factor, energy, harmonics (up to 15th)

Operating Temperature –20°C to +70°C (suitable for switchgear rooms and outdoor enclosures)

Standards Compliance IEEE C37.96. IEC 60255. UL 508. CSA C22.2 No. 142

Mounting Style Flush-mount or panel-mount (4.5″ x 5.75″ cutout)

Innovation Point 1: True Thermal Modeling with RTD Integration

Unlike basic thermal relays that estimate temperature from current alone, the 369-HI-0-M-0-0-0 fuses real-time RTD data with dynamic thermal capacity algorithms to calculate actual motor hot-spot temperature—preventing nuisance trips during startup while ensuring true overload protection under abnormal cooling conditions.

Innovation Point 2: Comprehensive Stall & Jam Detection

The relay continuously monitors torque-derived current signatures to distinguish between normal acceleration and mechanical binding. In mining conveyor applications, this has reduced false trips by over 60% compared to time-overcurrent-only schemes.

Innovation Point 3: Embedded Diagnostics & Event Recording

With 128 MB of non-volatile memory, the 369-HI-0-M-0-0-0 stores oscillography (16 cycles pre-fault, 32 post), sequence-of-events (SOE) logs with 1 ms resolution, and trend data—enabling root-cause analysis without external recorders.

Innovation Point 4: Cyber-Secure Legacy Modernization

Even in “non-Ethernet” configurations like the 369-HI-0-M-0-0-0. firmware can be upgraded to support secure Modbus RTU with password protection—critical for NERC CIP compliance in North American utilities.

A copper mine in Chile deployed over 50 GE 369-HI-0-M-0-0-0 relays on slurry pump motors operating in high-dust, high-vibration environments. The RTD inputs detected bearing overheating on three pumps before vibration sensors triggered alarms—allowing scheduled replacement during shift change rather than catastrophic seizure. Maintenance costs dropped by 30%, and unplanned downtime fell to zero over an 18-month period. Similarly, a combined-cycle plant in Italy uses the 369-HI-0-M-0-0-0 to protect induced draft fan motors, with its undercurrent function reliably detecting belt slippage—a common cause of boiler inefficiency previously missed by older electromechanical relays.

Related Product Combination Solutions

GE 369-HI-E-M-0-0-0: Ethernet-enabled version—with IEC 61850 GOOSE for fast tripping

GE T60: Line differential relay—for feeder protection upstream of 369-HI-0-M-0-0-0-protected motors

GE UR Series Test Switch: Enables safe CT/PT isolation during 369 maintenance

Multilin S70: Cybersecurity gateway—for adding firewall and encryption to legacy 369 networks

GE EPM7000: Power quality meter—complements 369’s metering with harmonic distortion analysis

GE Motor Insight: Cloud-based analytics platform—ingests 369 event data for fleet-wide motor health dashboards

GE 369-FB-0-M-0-0-0: Fiber-optic communication variant—for EMI-heavy environments like arc furnaces

GE Enervista 369 Setup: Official configuration software—for protection coordination and firmware updates

Installation, Maintenance, and Full-Cycle Support

Installing the 369-HI-0-M-0-0-0 requires proper CT polarity verification, RTD wiring (3- or 4-wire), and secure terminal torque (0.5–0.6 Nm). During commissioning, use Enervista 369 Setup to load protection curves, enable RTD alarms, and validate trip logic via simulated faults. Routine maintenance includes checking RTD continuity, reviewing event logs quarterly, and verifying backup settings. The relay’s front-panel display shows real-time current, temperature, and alarm status—no laptop needed for daily checks. Failed units can be replaced in under 10 minutes with settings restored from SD card or software backup.

Every 369-HI-0-M-0-0-0 we supply is new, factory sealed, and sourced through GE-authorized channels. Each unit undergoes full functional testing: thermal simulation, RTD alarm validation, overcurrent trip timing, and communication handshake. We provide a 12-month warranty, lifetime technical support for protection coordination studies, and rapid global logistics—ensuring your motor assets remain protected, compliant, and operational.

Contact us for a customized solution—whether you’re replacing obsolete electromechanical relays, hardening cybersecurity on legacy systems, or building a spares inventory for critical infrastructure, the GE 369-HI-0-M-0-0-0 delivers proven, intelligent motor protection that stands the test of time.