Description
The 269PLUS-D/O-210-100P-HI is a GE Multilin 269 Plus Motor Management Relay designed to deliver comprehensive protection, control, and monitoring for medium and large three-phase induction motors across industrial and utility applications. Integrating True-RMS current metering, an accelerated thermal model, 100 Ω platinum RTD temperature inputs, and RS485 Modbus communications in a single panel-mounted chassis, the 269PLUS-D/O-210-100P-HI replaces the scattered assembly of overload relays, thermistors, and analog meters that traditionally populate a motor control centre bucket.
Application Scenarios
A pulp-and-paper mill in the U.S. Pacific Northwest ran three 800 HP boiler feed-water pumps on 4.16 kV switchgear controlled by mechanical thermal overload relays. Every pump start on a hot summer afternoon produced nuisance trips that forced operators to restart units manually, and the mill had no visibility into actual winding temperature — thermal alarm events were either missed or logged by hand. When the maintenance team upgraded the pump MCC cubicles to the 269PLUS-D/O-210-100P-HI, the microprocessor-based thermal model tracked heating and cooling precisely across start-stop cycles, the RTD group gave continuous stator and bearing temperature readout to the plant historian via RS485, and the mill eliminated nuisance trips entirely while catching a bearing degradation event weeks before mechanical failure.
The 269PLUS-D/O-210-100P-HI addresses three chronic pain points in industrial motor protection: the inability of bimetallic thermal relays to model actual motor heating across repeated starts, the lack of early warning for mechanical degradation such as bearing wear and load jams, and the absence of a communications path to modern SCADA in legacy installations. Wherever a critical motor must be kept running — boiler feed pumps, cooling-tower fans, air compressors, conveyor drives, crushers, induced-draft fans, pipeline boosters — the 269PLUS-D/O-210-100P-HI provides the protection backbone that turns a motor from a black box into a managed asset.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 269PLUS-D/O-210-100P-HI |
| Manufacturer | GE Multilin (General Electric) — 269 Plus series |
| Product Category | Motor Management Relay / Motor Protection Relay |
| Current Sensing | 3-phase CT inputs; True-RMS measurement over 0.05 to 12 × phase CT primary amps |
| Current Accuracy | ±0.5% of full scale across the 0.05 to 2 × CT primary range |
| Thermal Model | Accelerated thermal overload with hot/cold curve scaling and start-supervision |
| RTD Inputs | 10 channels, 100 Ω Platinum — stator winding and bearing temperature monitoring |
| Protection Functions | Overload, undercurrent, stall, phase loss, phase unbalance, ground fault, stator overtemp, bearing overtemp, differential option |
| Relay Outputs | 4 programmable output relays |
| Contact Rating | 250 VAC / 10 A per output contact |
| Communications | RS485 port, Modbus RTU protocol — for SCADA, DCS, and PLC integration |
| Control Power | Universal AC/DC input, 50/60 Hz or DC |
| Ambient Operating Range | -25°C to +60°C — suitable for outdoor switchgear and unconditioned MCC rooms |
| Front Panel | LCD display with keypad for local setpoint, metering, and event review |
| LED Indicators | Trip, Alarm, Auxiliary 1, Auxiliary 2, Service |
| Housing / Dimensions | Panel-mount metal/plastic enclosure, approx. 11.4 × 7.5 × 4.8 in (289 × 192 × 121 mm) |
| Approximate Weight | 5 lb 14 oz (2.7 kg) |
