GE 269PLUS-D/O-211-100P-HI – Advanced Motor Protection Relay | Multilin 269 Plus Series
Engineering Background
The GE Multilin 269 Plus series represents General Electric’s flagship platform for medium-voltage motor protection in industrial environments. Designed to replace legacy electromechanical relays, the 269 Plus integrates comprehensive thermal, electrical, and mechanical protection functions into a single DIN-rail or panel-mount unit, reducing wiring complexity and improving diagnostic resolution for plant engineers.
Product Positioning
The 269PLUS-D/O-211-100P-HI variant is configured for direct/overcurrent protection with a 100–1000 A CT primary range and high-impedance ground fault input. It is the preferred specification for pump stations, compressor drives, conveyor systems, and critical process motors where nuisance tripping must be eliminated and thermal history must be preserved across power cycles.
Complete Technical Specifications
| Manufacturer | General Electric (GE Multilin) |
| Model / Part Number | 269PLUS-D/O-211-100P-HI |
| Series | Multilin 269 Plus |
| Protection Type | Enhanced Thermal Model (ETM) |
| Configuration Code | D/O = Direct / Overcurrent; 211 = I/O configuration; 100P = 100–1000 A CT primary; HI = High-Impedance Ground Fault |
| CT Primary Range | 100 – 1000 A |
| CT Secondary | 1 A or 5 A (selectable) |
| Ground Fault Input | High-Impedance (HI) — sensitive earth fault detection |
| Control Power | 100–240 V AC / 125–250 V DC (universal) |
| Output Relays | 3 × Form C (Trip, Alarm, Auxiliary) |
| Digital Inputs | 4 × optically isolated |
| Communication | RS-485 Modbus RTU (optional) |
| Display | 4-digit LED with navigation keypad |
| Thermal Memory | Non-volatile; retained across power loss |
| Metering | 3-phase current (Ia, Ib, Ic), ground current (Ig), thermal capacity used (%TCU), motor start count, run hours |
| Protection Functions | Thermal overload (IEC/ANSI), phase unbalance, phase loss, locked rotor, stall, undercurrent, ground fault, RTD (optional), starts-per-hour, restart inhibit |
| Mounting | Panel cutout / flush mount |
| Enclosure Rating | IP40 (front face) |
| Operating Temperature | -20 °C to +60 °C |
| Weight | 520 g (approx.) |
| Certifications | UL, CE, CSA |
| SKU | 269PLUS-D/O-211-100P-HI |
Proven Application Environments
- Oil & Gas: Pump motor protection on wellhead and pipeline stations
- Water & Wastewater: High-cycle pump duty with frequent start/stop sequences
- Mining & Minerals: Conveyor drives and crusher motors subject to high inertia loads
- Pulp & Paper: Refiner and agitator motors with variable load profiles
- Power Generation: Auxiliary motor protection in generating stations
- Chemical & Petrochemical: Compressor and agitator drives in hazardous-area switchgear
- Marine & Offshore: Deck machinery and HVAC motor protection
Engineering Advantages
- Enhanced Thermal Model (ETM): Accurately tracks motor thermal state using a dual-time-constant algorithm, accounting for ambient temperature via RTD inputs — eliminates nuisance trips and prevents thermal damage simultaneously.
- High-Impedance Ground Fault (HI): Detects resistive ground faults as low as a few milliamps on high-resistance grounded systems — critical for continuous-process industries where ground faults must be alarmed before tripping.
- Non-Volatile Thermal Memory: Thermal capacity used (%TCU) is stored in EEPROM; the relay resumes protection from the correct thermal state after a power interruption — no cool-down bypass risk.
- Integrated Metering & Diagnostics: Eliminates the need for separate ammeters; provides start count, run hours, and last-trip cause — directly accessible from the front panel without a laptop.
- Universal Control Power: Single SKU supports both AC and DC control voltage — simplifies spare-parts inventory for multi-site operations.
- Modbus RTU Ready: Native RS-485 port enables integration with SCADA, DCS, and PLC systems without additional gateways.
System Architecture & Signal Flow
The 269PLUS-D/O-211-100P-HI operates as a self-contained protection IED within the motor control circuit:
- Current Sensing: Phase CTs (100–1000 A primary) and a dedicated ground CT feed the relay’s analog input board.
- Thermal Engine: The ETM continuously calculates %TCU based on measured current, unbalance factor, and RTD feedback (if wired). Trip and alarm thresholds are user-configurable in multiples of FLA.
- Protection Logic: Parallel protection elements (overload, unbalance, ground fault, stall, undercurrent) are evaluated every 8 ms. Any element asserting its threshold drives the assigned output relay.
- Output Relays: Trip relay opens the motor contactor or breaker shunt trip; Alarm relay signals the DCS/SCADA; Auxiliary relay is user-assignable (e.g., restart inhibit, pre-alarm).
- Communication Layer: Modbus RTU over RS-485 exposes all metering values, setpoints, and event log to the host system — enabling remote commissioning and condition monitoring.
Sourcing & Quality Verification
- Units sourced from verified industrial surplus channels and authorized distributors — no grey-market or counterfeit risk.
- Each unit undergoes visual inspection (label integrity, connector condition, display function) prior to listing.
- Original GE firmware version confirmed; no field modifications or resets applied.
- Packaging: anti-static bag + foam-lined carton; original GE documentation included where available.
- Certificate of conformance (CoC) available on request for regulated industries.
Procurement Process
- Confirm Compatibility: Verify your CT primary range (100–1000 A), control voltage (AC/DC), and ground fault scheme (high-impedance) match your switchgear specification.
- Request a Quote: Contact support@konmask.com for volume pricing, lead time, and CoC availability.
- Place Order: Purchase directly via this listing or via PO — net terms available for qualified B2B accounts.
- Shipping: DHL / FedEx international express; export documentation (commercial invoice, packing list, HS code 8536.49) provided.
- After-Sales: 30-day return window for DOA units; technical commissioning support available via email.
Technical FAQ
Q: What is the difference between the standard 269 Plus and the Enhanced Thermal Model (ETM)?
A: The ETM variant adds a dual-time-constant thermal algorithm and RTD ambient correction, providing more accurate thermal tracking for motors with high inertia loads or variable ambient conditions. The standard model uses a single-time-constant curve.
Q: Can this relay be used on a solidly grounded system?
A: The HI (High-Impedance) ground fault input is optimized for high-resistance grounded (HRG) systems. For solidly grounded systems, the standard ground fault input variant (without HI suffix) is recommended. Consult GE Multilin application note GEK-106310 for grounding scheme selection.
Q: Is the Modbus RTU port standard or optional?
A: On the 269PLUS-D/O-211-100P-HI, the RS-485 Modbus RTU port is included as standard hardware. It must be enabled via the front-panel menu (Communications → Protocol → Modbus).
Q: What CT ratio should I use?
A: Select a CT with a primary rating within the 100–1000 A range and a 1 A or 5 A secondary. The relay’s FLA setting must be programmed to match the motor’s nameplate full-load amperes as a percentage of the CT primary.
Q: Can I order a replacement with a different CT range?
A: Yes. GE Multilin 269 Plus is available in multiple CT range variants. Contact us with your motor FLA and we will confirm the correct part number.
Q: What is the lead time for this unit?
A: In-stock units typically ship within 1–2 business days. Contact us to confirm current availability before placing a time-critical order.
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