Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | 269PLUS-100P-120 (Full code: 269PLUS-D/O-261-100P-120) |
| Manufacturer | GE Multilin / GE Vernova |
| Product Type | Motor Management Relay |
| Control Power | 120 V AC / 125 V DC |
| RTD Inputs | 12 × 100 Ω platinum RTD (PT100) |
| Digital Inputs | 5 programmable (dry contacts only) |
| Relay Outputs | 4 Form C contacts (main trip, alarm, 2 auxiliary) |
| Analog Output | 1 × 4-20 mA programmable |
| Communication | RS485, Modbus RTU |
| Software | EnerVista 269 |
| Operating Temperature | -25°C to +60°C |
| Dimensions (W×H×D) | Approx. 193 × 125 × 290 mm |
| Weight | Approx. 2.8 – 3.5 kg |
| Protection Functions | Overload, short circuit, ground fault, unbalance, phase reversal, locked rotor, undercurrent, mechanical jam, RTD overtemperature |
| Mounting | Panel / rack mount (NEMA 12 / IP40) |
Main Features and Advantages
Intelligent Thermal Modeling with RTD Bias: The GE Multilin 269PLUS-100P-120 employs a unique adaptive thermal model that continuously calculates stator and rotor thermal capacity using real-time current data and temperature feedback from up to twelve PT100 RTDs . This “learning” capability allows the relay to automatically capture motor-specific parameters such as cooling rates and inrush characteristics, storing them in non-volatile memory. The thermal capacity value determined by the algorithm is cross-checked against actual RTD measurements, with the system acting on the higher of the two values to ensure conservative, reliable protection. This approach effectively handles scenarios like fan failure or abnormal ambient temperature rises, preventing winding burnout before damage occurs.
Comprehensive Protection Suite: The GE Multilin 269PLUS-100P-120 integrates a full range of protection functions essential for industrial motor integrity. These include eight selectable standard overload curves plus a user-defined FlexCurve, locked rotor protection, short circuit protection, ground fault (earth leakage) detection, phase unbalance/single-phasing protection, phase reversal prevention, undercurrent detection for load loss, and mechanical jam/trip protection . The negative sequence current measurement specifically addresses the additional rotor heating caused by unbalanced supply voltages, a feature critical for preventing premature motor failure.
Flexible Programming and Monitoring: The GE Multilin 269PLUS-100P-120 offers extensive programmability through its front-panel keypad or the EnerVista 269 software . The relay provides a complete statistical record of motor operation, including start counts, runtime hours, cause of last trip, and thermal capacity data. The built-in HELP function guides users through setpoint configuration, while the RS485 Modbus communication port enables seamless integration with PLCs and SCADA systems for centralized control and data acquisition. This combination of local intelligence and remote connectivity makes the GE Multilin 269PLUS-100P-120 a valuable asset in modern integrated plant control architectures.
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