GE SR469-P5-HI-A20-T – 469 Series Motor Management Relay

Technical Specifications

• Manufacturer: GE Multilin (GE Vernova/GE Grid Solutions)
• Model: SR469-P5-HI-A20-T
• Series: 469 Motor Management Relay
• Primary Application: Medium-voltage (MV) three-phase motor protection & control
• Phase CT Secondary: 5 A
• Control Power:
  • AC: 70–265 VAC, 48–62 Hz
  • DC: 90–300 VDC
• Analog Outputs: 4 × 4–20 mA (isolated)
• Communication Ports:
  • 1 × RS232 (front panel, for local programming)
  • 2 × RS485 (rear panel)
  • Optional 10BaseT Ethernet (Modbus TCP/IP)
• Protocol Support: Modbus RTU (RS232/RS485), Modbus TCP/IP (Ethernet)
• Metering Accuracy: ±0.2% (current/voltage), ±0.5% (power/energy)
• Thermal Sensors: Supports up to 6 RTD inputs (PT100/PT1000)
• Operating Temperature: -40°C to +70°C (-40°F to 158°F)
• Storage Temperature: -50°C to +85°C (-58°F to 185°F)
• Relative Humidity: 5%–95% (non-condensing)
• Dimensions (H×W×D): 260 mm × 180 mm × 120 mm
• Weight: 3.5 kg (net); 4.8 kg (shipping)
• Certifications: CE, UL, CSA, IEC 60255 (industrial safety & EMC compliance)

Key Features

1. Comprehensive Motor Protection Suite
   • Electrical Protection: Overload, short circuit, ground fault (two dedicated CT inputs), overvoltage, undervoltage, current unbalance, reverse power, and stall protection.
   • Thermal Protection: Advanced motor thermal modeling with RTD biasing, cooling time constant adjustment, and hot/cold stall ratio detection.
   • Mechanical Protection: Overtorque, load loss, and phase sequence fault detection to prevent mechanical damage.
2. Precision Monitoring & Data Logging
   • Real-time metering of current, voltage, power, energy, frequency, and power factor.
   • 40-digit LCD display + LED status indicators for local visibility of motor health, faults, and alarms.
   • 512-event fault recorder with time stamping and waveform capture for post-fault analysis and predictive maintenance.
3. Flexible Communication & System Integration
   • Multiple serial ports and optional Ethernet enable seamless connectivity to PLCs, DCS, SCADA, and HMI systems.
   • Modbus RTU/TCP/IP protocols support real-time data exchange and remote configuration via GE’s EnerVista 469 software.
   • Four isolated 4–20 mA analog outputs transmit critical motor parameters (e.g., temperature, load) to external monitoring devices.
4. Robust & User-Friendly Design
   • Draw-out construction allows hot-swap replacement without system shutdown, minimizing maintenance downtime.
   • Field-upgradable firmware and customizable protection logic adapt to diverse motor types and operating conditions.
   • Simplified wiring with color-coded terminals and a sealed, lockable front handle to prevent unauthorized access.
   

Application Scenarios

• Oil & Gas: Protects large MV motors driving compressors, pumps, and fans in refineries, pipelines, LNG plants, and offshore platforms.
• Power Generation: Used in thermal, hydro, and combined-cycle power plants for boiler feed pumps, induced draft fans, and conveyor motor protection.
• Water & Wastewater: Safeguards MV motors for pumps, blowers, and aerators in municipal and industrial water treatment facilities.
• Mining & Metals: Protects motors for crushers, conveyors, mills, and hoists in harsh mining, steel, and aluminum processing environments.
• Chemical & Petrochemical: Ensures reliable operation of MV motors driving mixers, reactors, and process pumps in corrosive and high-temperature industrial settings。