489-P5-HI-A20-T

The 489-P5-HI-A20-T relay, manufactured by GE Multilin (now part of Vertiv), is a high-performance generator management relay designed for advanced protection, control, and monitoring of synchronous and induction generators. Below are its key technical parameters and features:

1. Core Technical Specifications

• Current Transformers (CT) Inputs:
  • Phase CT Secondary: 5 A (standard) or 1 A (configurable).
  • Primary CT Range: 10 A to 10,000 A (scalable for various generator ratings).
• Voltage Transformers (VT) Inputs:
  • Voltage Input Range: 0.005 to 1.00 (per unit) with a full-scale range of 0.005–1.00 × VT secondary (typically 100 VAC).
  • VT Ratio: 1.00:1 to 240.00:1 (adjustable).
• Control Power Supply:
  • DC: 90–300 VDC.
  • AC: 70–265 VAC, 48–62 Hz.
• Analog Output:
  • 4–20 mA (configurable for metering or control signals).
• Digital Inputs:
  • 9 optically isolated inputs (dry contact or NPN transistor compatible).
• Relay Outputs:
  • Configurable for tripping, alarming, or control functions.
• Sampling Rate:
  • 50 ms (fast enough for transient protection).
• Frequency Tracking:
  • Minimum 10 Hz/second for accurate frequency measurement.

2. Display and User Interface

• Ethernet-Enhanced Display:
  • Larger LCD with enhanced visibility and Ethernet connectivity for remote monitoring and configuration.
  • Supports real-time data logging, event reports, and waveform capture.
• Front-Panel Controls:
  • Navigation keys, status indicators, and a help button for easy operation.

3. Protection Functions

• Generator Protection:
  • Differential protection (percentage or restrained).
  • Overcurrent (phase, ground, and negative sequence).
  • Overvoltage/undervoltage, overfrequency/underfrequency.
  • Loss of excitation, reverse power, and out-of-step protection.
  • Stator earth fault and rotor earth fault detection.
• Breaker Failure Protection:
  • Monitors breaker operation and initiates backup tripping if needed.
• Voltage Transformer (VT) and Current Transformer (CT) Supervision:
  • Detects fuse failure, open circuits, or polarity reversals.

4. Communication and Integration

• Ethernet Connectivity:
  • Supports Modbus TCP/IP, DNP3, IEC 61850 (optional), and other protocols.
  • Enables integration with SCADA systems or DCS.
• EnerVista 489 Software:
  • PC-based configuration and monitoring tool.
  • Provides waveform analysis, event reports, and firmware updates.
  • Supports offline and online configuration.

5. Environmental and Mechanical Specifications

• Operating Temperature:
  • -20°C to +60°C (standard).
• Storage Temperature:
  • -40°C to +85°C.
• Humidity:
  • 5% to 95% non-condensing.
• Enclosure:
  • IP40 (front panel) / IP20 (overall), suitable for indoor installations.
• Approvals:
  • Compliant with IEC 60255, IEEE C37.90, and other relevant standards.
  • UL, CE, and CSA certified.

6. Testing and Compliance

• EMC Testing:
  • Immunity to electrostatic discharge (ESD), radiated electromagnetic fields (RE), and surge voltages.
  • Complies with IEC 61000-4 series standards.
• Environmental Testing:
  • Vibration (IEC 60068-2-6), shock (IEC 60068-2-27), and temperature cycling.
• Safety Standards:
  • Meets UL 508, IEC 60947, and other safety regulations.

7. Additional Features

• Event Recording:
  • Stores up to 1000 events with timestamps and waveforms.
• Oscillography:
  • Captures pre- and post-fault waveforms for analysis.
• Programmable Logic:
  • Customizable logic for interlocking or control sequences.
• Firmware Upgrades:
  • Over-the-air (OTA) or via EnerVista 489 software.

Applications

• Power Generation Plants:
  • Hydro, thermal, gas, and renewable energy generators.
• Industrial Facilities:
  • Cogeneration plants, combined-cycle power plants.
• Critical Infrastructure:
  • Hospitals, data centers, and airports.

Conclusion

The 489-P5-HI-A20-T is a highly configurable and robust generator management relay designed for demanding protection and control applications. Its Ethernet-enhanced display, advanced protection algorithms, and compliance with international standards make it suitable for modern power generation and industrial systems.

For detailed configuration or specific application requirements, refer to the GE Multilin 489 Series Technical Manual or contact GE/Vertiv support.