Description

The GE Multilin 269PLUS is a high-performance, microprocessor-based motor protection and management relay designed to safeguard low- and medium-voltage motors in industrial, utility, and commercial applications. It provides comprehensive electrical protection (overload, phase imbalance, ground fault, stall, etc.), thermal modeling, and advanced diagnostics—while supporting modern communication protocols for seamless integration into SCADA, DCS, and IIoT platforms.

Engineered for reliability and ease of use, the 269PLUS extends motor life, reduces unplanned downtime, and enhances operational safety through real-time monitoring, event recording, and remote configuration capabilities.

Application Scenarios

At a petrochemical plant in Louisiana, a critical boiler feedwater pump kept tripping due to “mystery” overloads—costing over $ 200K per incident in lost production. Engineers installed the GE Multilin 269PLUS with RTD inputs to monitor winding temperature and 4–20 mA inputs for flow feedback. The relay’s adaptive thermal model revealed that the motor was overheating during startup due to a sticky discharge valve—not electrical overload. Using the 269PLUS’s oscillography and event logs, maintenance corrected the mechanical issue. Over the next 18 months, unplanned outages dropped to zero, and the motor’s insulation resistance remained stable. “It didn’t just protect the motor—it diagnosed the system,” said the plant’s lead engineer.

Key Parameters

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Technical Principles and Innovative Values

✅ Innovation Point 1: Adaptive Thermal Modeling

Unlike fixed thermal curves, the 269PLUS uses real-time current, ambient temperature (from RTDs), and motor cooling constants to simulate actual rotor/stator heating—preventing nuisance trips during frequent starts while ensuring true thermal protection.

✅ Innovation Point 2: Integrated Process Awareness

With 4–20 mA and RTD inputs, the 269PLUS correlates electrical behavior with process conditions (e.g., low flow + high current = pump cavitation). This enables predictive maintenance, not just reactive protection.

✅ Innovation Point 3: Cyber-Secure Remote Access

Built-in Ethernet with password protection, audit logs, and optional IEC 62351 support allows secure remote monitoring via Enervista™ software—ideal for unmanned pump stations or distributed facilities.

✅ Innovation Point 4: Arc Flash Energy Reduction

Fast-acting short-circuit and stall protection (trip in <30 ms) limits fault energy, helping comply with NFPA 70E arc flash safety requirements.

Application Cases and Industry Value

A municipal water authority in California deployed 269PLUS relays across 32 lift stations to replace aging electromechanical overload devices. Each 269PLUS monitored motor current, bearing temperature (RTD), and sump level (4–20 mA). Within one year, early detection of dry-run conditions prevented 7 potential motor burnouts. Remote access eliminated 80% of routine site visits. Most notably, during a wildfire evacuation, operators remotely shut down non-critical pumps via Modbus TCP—saving energy and protecting infrastructure. The ROI was achieved in 11 months.

Related Product Combination Solutions

Enervista 269PLUS Setup Software: Official configuration, testing, and firmware update tool

GE Multilin 369: Simpler version for basic motor protection (no RTD/mA)

GE Multilin 469: Enhanced version with more I/O, dual Ethernet, and advanced metering

CT/VT Sensors (e.g., GE T60-compatible): For accurate current/voltage measurement

RTD Probes (Pt100): For direct stator/bearing temperature monitoring

Control Power Supply (24 V DC): For relay output coils and logic power

HMI Panel Integration: Via Modbus TCP to Rockwell, Siemens, or Wonderware systems

CyberSens™ Security Appliance: For network segmentation in critical infrastructure

Installation, Maintenance, and Full-Cycle Support

Installation requires standard CT wiring, optional RTD/mA connections, and communication cabling. The 269PLUS auto-detects CT ratio and guides setup via its menu-driven interface. Commissioning is accelerated using Enervista, which supports template-based configuration and automated test sequences.

Maintenance is largely predictive: the relay tracks thermal capacity used, start count, run hours, and trip history. Alarms can be set for abnormal trends (e.g., rising bearing temp). Firmware updates are delivered securely via USB or Ethernet.

With a design life exceeding 15 years, the 269PLUS is supported by GE Vernova’s global service network—including obsolescence planning, calibration verification, and failure analysis.

Final Note

Whether protecting a 10 HP fan or a 5 MW compressor, the GE Multilin 269PLUS delivers intelligent, process-aware motor management that goes far beyond traditional overload relays. It transforms motor control from a passive safety function into an active asset optimization tool.

Contact us for application engineering support, retrofit kits, or cybersecurity hardening packages—tailored to your plant’s reliability and digital transformation goals.