GE 469-P5-LO-A20-E – Multilin 469 Series Motor Management Relay (Low Control Power, Enhanced Display)

Technical Specifications

Manufacturer: GE Multilin (General Electric)
Model: 469-P5-LO-A20-E
Series: Multilin 469 Motor Management Relay
Control Power (LO): 20–48 VAC (48–62 Hz) / 24–60 VDC
Primary CT Input: 1–5000 A (5 A phase CT secondaries)
Ground Current Input: 0.02–1 × CT primary amps
Communication Ports: RS232 (9600 baud), RS485 (Modbus RTU)
Analog Output: 4–20 mA (field-configurable)
Digital Inputs: 9 opto-isolated inputs
Output Relays: 6 Form-C contacts (5 A switching capacity)
RTD Inputs: 3-wire (100Ω Pt, 100Ω Ni, 120Ω Ni, 10Ω Cu)
Display: 40-character alphanumeric LCD (enhanced faceplate)
Dimensions (W×D×H): 216 mm × 224 mm × 252 mm (8.52″ × 8.8″ × 9.93″)
Weight: 1.36 kg (3 lbs)
Operating Temperature: -40°C to +60°C (-40°F to 140°F)
Storage Temperature: -40°C to +70°C (-40°F to 158°F)
Relative Humidity: 5%–95% (non-condensing)
Certifications: CE, UL, CSA (industrial safety & EMC compliance)
Enclosure Rating: IP20 (front panel)

Key Features

Comprehensive Motor Protection Suite
- Thermal Overload: Advanced thermal model with RTD-based stator temperature monitoring.
- Electrical Faults: Short-circuit, ground fault, current unbalance, and phase reversal protection.
- Mechanical Protection: Torque metering/protection, broken rotor bar detection, and load loss detection.
- Voltage/Frequency: Overvoltage, undervoltage, and under/overfrequency protection.
Enhanced User Interface & Diagnostics
- 40-character LCD: Real-time display of motor status, current, voltage, temperature, and fault logs.
- LED Indicators: Dedicated LEDs for power, trip, alarm, and communication status.
- Fault Recording: Stores up to 512 events with time stamps for post-fault analysis.
- Motor Settings Auto-Configurator: Simplifies setup by auto-calculating protection curves from motor nameplate data.
Flexible Communication & Integration
- Modbus RTU (RS485): Seamless integration with SCADA, DCS, and PLC systems for remote monitoring/control.
- RS232 Port: Local configuration, firmware upgrades, and data logging (9600 baud).
- 4–20 mA Analog Output: Transmits key parameters (e.g., current, temperature) to external devices.
Robust Industrial Design
- Fully Drawout Construction: Automatic CT shorting for safe removal without de-energizing the motor circuit.
- Low Power Operation: Optimized for 20–48 VAC / 24–60 VDC control power, suitable for low-voltage auxiliary systems.
- Field-Upgradable Firmware: Enables feature enhancements without hardware replacement.
- Vibration & EMI Resistance: Designed to withstand 8.0 g sinusoidal vibration (72 hours) and 50 MHz RFI interference.

Application Scenarios

Oil & Gas
- Pumps & Compressors: Protects large motor-driven pumps, compressors, and fans in refineries, pipelines, and LNG plants.
- Offshore Platforms: Ensures reliable motor operation in harsh, corrosive environments.
Power Generation
- Auxiliary Motors: Manages cooling water pumps, induced draft fans, and conveyor motors in thermal power plants.
- Renewable Energy: Protects motors in hydroelectric and biomass power facilities.
Metals & Mining
- Conveyors & Crushers: Provides protection for high-torque motors in mining conveyors, crushers, and grinding mills.
- Steel Mills: Monitors motors for rolling mills, furnaces, and material handling equipment.
Water & Wastewater
- Pumping Stations: Protects large sewage and water supply pumps in municipal and industrial water treatment plants.
General Industrial
- Chemical & Petrochemical: Controls motors for reactors, mixers, and process pumps.
- Cement & Pulp/Paper: Manages motors for kilns, grinders, and paper machines.