GE 489-P5-HI-A20-T – Generator Management Relay (GE Multilin 489 Series)

Technical Specifications

• Manufacturer: General Electric (GE Multilin)
• Model: 489-P5-HI-A20-T
• Series: 489 Generator Management Relay Series
• Control Power: 90–300 VDC / 70–265 VAC (48–62 Hz)
• Phase CT Inputs: 5 A (secondary)
• Analog Outputs: 4–20 mA (isolated)
• Digital Inputs: 4 (24 VDC sensor supply, 20 mA max)
• Relay Outputs: 8 Form-C contacts (silver-alloy material)
• Communication: 10Base-T Ethernet, RS485, USB (front panel)
• Protocols: Modbus RTU/TCP, DNP3.0, IEC 61850
• Frequency Range: 40–70 Hz
• Accuracy: ±1% of full scale (analog current inputs)
• Protection Class: IP40 (front), IP10 (rear)
• Operating Temperature: -40°C to +70°C (-40°F to 158°F)
• Storage Temperature: -40°C to +85°C (-40°F to 185°F)
• Relative Humidity: 5%–95% (non-condensing)
• Weight: 7.7 kg (17 lbs)
• Dimensions (H×W×D): 305 mm × 279 mm × 305 mm (12 in × 11 in × 12 in)

Key Features

1. Comprehensive Generator Protection
   • Differential protection for internal winding faults.
   • Overcurrent, overvoltage, undervoltage, and frequency protection.
   • Thermal overload protection with RTD input monitoring (stator/bearing temperature).
   • Negative sequence overcurrent protection for phase unbalance faults.
2. Precision Monitoring & Control
   • Real-time monitoring of voltage, current, power, frequency, and temperature.
   • Demand metering (rolling demand) and energy accumulation.
   • Synchrocheck function with slip frequency measurement for safe generator paralleling.
3. Advanced Communication & Connectivity
   • Ethernet 10Base-T for high-speed remote monitoring and control.
   • Front-panel USB port for quick configuration and firmware updates.
   • Supports multiple industrial protocols for SCADA/DCS integration.
4. User-Friendly Interface & Configuration
   • Enhanced front-panel display with LED indicators for status and fault diagnostics.
   • EnerVista 489 software for easy setup, logic programming, and data analysis.
   • Configurable logic equations and adaptive protection curves for customized schemes.
5. Robust Industrial Design
   • Fully drawout construction with automatic CT shorts for safe maintenance.
   • Ruggedized components and wide temperature tolerance for harsh environments.
   • Non-volatile memory preserves settings during power outages.

Application Scenarios

• Power Generation Plants
  • Small/Medium Hydro Plants: Protection and control for hydroelectric generators.
  • Cogeneration Facilities: Monitoring of gas/steam turbine-driven generators.
  • Distributed Generation: Grid-parallel and island-mode generator management.
• Industrial Facilities
  • Oil & Gas: Generator protection for refineries, pipelines, and offshore platforms.
  • Chemical & Petrochemical: Critical power supply monitoring for process continuity.
  • Manufacturing: Backup generator management for factories and industrial parks.
• Utility & Commercial Systems
  • Utility Grids: Generator interconnection protection and synchronization.
  • Data Centers: Uninterruptible power supply (UPS) generator control.
  • Hospitals & Institutions: Reliable backup power management for critical loads.