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Description:
The GE Multilin 269PLUS-D/O-211-100P-HI is a digital motor management relay from GE Multilin (now GE Vernova), part of the 269 Plus motor protection family for medium-sized three-phase AC motors. It is a microprocessor-based protection, monitoring and control device that combines a current-derived thermal model with direct temperature measurement from resistance temperature detectors.In the field, 269PLUS-D/O-211-100P-HI continuously measures phase and ground current through external CTs, reads up to ten RTDs embedded in the stator windings and bearings, and decides — against a learned model of that specific motor — whether to alarm, inhibit a start, or trip. Its defining characteristic is that it learns rather than assumes: motor inrush current, acceleration time, cooldown rate and the negative-sequence heating factor are measured from the actual machine, not entered from a nameplate guess.
Application Scenarios:
A cement plant runs a 2 MW ball mill on a medium-voltage motor with a locked-rotor withstand time the motor manufacturer rates tightly. On a conventional overload relay, the protection is set from a generic curve: conservative enough that the mill nuisance-trips during high-inertia starts on cold winter mornings, or loose enough that a genuine stalled start cooks the rotor before the relay acts. Every nuisance trip costs a kiln trip and hours of lost clinker production; every missed trip costs a rewind. Neither failure mode is acceptable, and the two pull the setting in opposite directions.This is the tension 269PLUS-D/O-211-100P-HI is built to resolve. Because 269PLUS-D/O-211-100P-HI learns the motor’s actual acceleration time and inrush, and because its thermal model is biased in real time by both negative-sequence current and live RTD temperature, it protects the full rotor damage envelope during a start while still allowing the starts the process genuinely needs. When a bearing begins to run hot, the operator sees it on the front display as a rising alarm long before it reaches trip level — so the failure becomes a planned bearing change on the next shutdown rather than an unplanned outage this shift.The drawout construction adds a second, distinct value. Because 269PLUS-D/O-211-100P-HI can be withdrawn from its case without shutting the motor down, the relay can be tested, calibrated or replaced during production. For a continuous process where a protection relay test would otherwise require a process stop, that capability alone often justifies the specification.
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 269PLUS-D/O-211-100P-HI |
| Manufacturer | GE Multilin (GE Vernova) — Markham, Ontario; country of origin USA |
| Product Category | Digital motor management relay — protection, monitoring and control for medium-sized three-phase AC motors |
| Order Code — D/O | Drawout case version. The relay cradle withdraws from its case without de-energising the motor, so the unit can be tested or swapped during production |
| Order Code — 2 (Phase / Ground CT) | Phase CT 5 A secondary, ground CT 5 A secondary. CT ratio is keypad-programmed, maximum 1500:5 |
| Order Code — 1 (Relay Fail-Safe) | Trip relay = fail-safe; Alarm = non-fail-safe; Aux 1 = non-fail-safe; Aux 2 = fail-safe. A fail-safe relay changes state when control power is applied, so a supply failure drives the trip output to its safe state |
| Order Code — 1 (Contact Arrangement) | Alarm, Aux 1 and Aux 2 all normally open (N.O.) |
| Order Code — 100P | 100 Ω platinum RTD inputs. Other factory options: 10 Ω copper, 100 Ω nickel, 120 Ω nickel — specified at order and not field-selectable |
| Order Code — HI | Universal control power 90–300 V DC / 80–265 V AC, 50/60 Hz. (LO variant = 20–60 V DC / 20–48 V AC) |
| Protection Functions | Thermal overload with 8 standard curves plus user-programmable FlexCurve™; RTD-biased thermal model; stator and bearing overtemperature; locked rotor; multiple starts; rapid trip / mechanical jam; unbalance and single-phasing; short circuit; ground fault; undercurrent; phase reversal (meter option); variable lock-out time |
| Temperature & RTD Inputs | 10 multiplexed RTD channels (GE’s current brochure states 12 programmable). Display accuracy ±2 °C; setpoint range 0–200 °C; 3 °C dead band; maximum lead resistance 25 % of RTD resistance at 0 °C; open-sensor detection distinguishes a broken lead from a hot winding |
| Outputs & I/O | 4 output relays — 1 latched trip, 1 alarm, 2 auxiliary; 5 factory-programmed digital inputs (speed switch, differential relay, spare, external reset, emergency restart); 1 programmable analogue output, field-selectable 0–1 mA / 0–20 mA / 4–20 mA |
| Communication & Interface | RS-485 serial port, Modbus RTU; 12-key keypad with 2 × 24-character alphanumeric display; front-panel Trip / Alarm / Aux 1 / Aux 2 / Service LEDs |
| Electrical Ratings | Phase current input 0.05–12 × CT primary, true RMS, 2 ms sampling; accuracy ±0.5 % of full scale up to 2 × CT primary, ±1.0 % above; ground fault input 0.1–1.0 × ground CT primary (5 A CT); maximum power consumption 20 VA; 100 ms supply hold-up at 120 V AC / 125 V DC |
| Environmental & Mechanical | Operating −25 °C to +60 °C; humidity 0–95 % non-condensing; drawout case supplied in a shipping carton of approximately 340 × 320 × 520 mm; conforms to UL 508 (file E83849), CSA, CE, ISO 9001 manufacture |
| Lifecycle Status | Discontinued by GE. GE Grid Solutions directs users to the Multilin 859 or 369 as alternatives |
