489-P5-LO-A20-E

About the 489-P5-LO-A20-E

• The 489-P5-LO-A20-E is a GE Multilin Relay belonging to GE’s SR family (which also includes the 469 Motor Protection Relay and 735 Feeder Protection Relay).
• It is specifically designed for Generator Protection and can be used with both induction and synchronous generators.
• The unit can operate at 25, 50, or 60 Hz.

User Interface and Control

• Features a 40-character display for viewing value messages, diagnostics, and setpoints.
• The front panel includes:
  • A numeric keypad
  • Status indicators
  • Value up and down keys
  • An RS232 port interface
  • Control and programming keys (reset, enter, menu, menu up, menu down)
• This design allows for control without needing an external computer.

Back Panel Connectivity and I/O

• The back panel provides:
  • Twelve RTD inputs (field programmable).
  • Six output relays.
  • Two RS485 communications ports supporting ModbusRTU or DNP 3.0 protocol (or both) up to 19200 bps.
  • Four VT inputs.
  • Four isolated 4-20 mA analog inputs and outputs.
  • Seven assignable digital inputs.
  • Seven CT inputs for three-phase output/three-phase neutral and ground current sensing.
  • A separate safety and filter ground.
• All inputs meet SWC, C37.990 EMI, RFI interference immunity standards.

Key Features Summary

• Comprehensive motor protection including voltage-dependent overload curves, torque metering and protection, and broken rotor bar protection.
• Most advanced thermal model with multiple RTD inputs for stator thermal protection.
• Minimizes replacement time due to draw-out construction.
• Offers complete asset monitoring (temperature, Analog I/O, full metering including demand & energy).
• Improves uptime of auxiliary equipment through I/O monitoring.
• Reduces troubleshooting time and maintenance costs via event reports, waveform capture, and data logger.
• Built-in simulation functions simplify testing and commissioning.
• Provides cost-effective access to information through standard RS232 & RS485 serial ports, and optional Ethernet and DeviceNet Ports.
• Supports field upgradable firmware and settings.
• Offers optional Conformal coating for exposure to chemically corrosive or humid environments.