SR489-P5-HI-A20-T GE Generator Management Relay

• Brand
  GE
• Model
  SR489-P5-HI-A20-T 
• Product Name
  Generator Management Relay
• Place of Origin
  United States
• Customs HS Code
  8536300000
• Power Supply
  90–300 VDC / 70–265 VAC, 48–62 Hz
• Dimensions
  144 mm × 144 mm × 112 mm
• Weight
  1.8 kg
• Operating Temperature
  -20 °C to +70 °C
• Storage Temperature
  -40 °C to +85 °C
• Warranty
  1 year
• Product Status
  original

Application Scenarios for GE SR489-P5-HI-A20-T

Industrial cogeneration facilities (petrochemical, steel, chemical and cement industries): Primary or backup protection for synchronous and induction generators, grid interconnection monitoring, reverse power, loss-of-excitation and stator differential protection.

Combined-cycle power plants, small gas turbine and diesel generator sets: Island and grid-tied generator management, RTD-based thermal protection, fault waveform recording and sequence-of-event logging.

Small hydropower stations and biomass distributed power generation: Protection for medium and small generator units, frequency and voltage anomaly protection, anti-islanding logic.

Standby power for key infrastructures: Waterworks, wastewater treatment plants, data centers and hospital emergency generators, automatic control and protection for backup gensets.

Marine power systems: Onboard generator protection, phase unbalance, over-frequency and under-frequency monitoring for ship power plants.

Legacy power system renovation projects: Replacement of outdated generator protection relays; transmission of protection data to DCS/SCADA via Modbus TCP and DNP3.0.

Auxiliary control of generator units: Breaker failure monitoring, excitation supervision, V/Hz overfluxing protection, thermal overload alarm and tripping for windings and bearings.

Remote power supply in mining sites: Off-grid small generator sets, stable protection under dusty and high-vibration harsh conditions.

Comprehensive Generator Protection

It applies to synchronous and induction generators, featuring stator differential protection, 100% stator ground fault protection, directional ground overcurrent, negative sequence overcurrent, voltage-restrained overcurrent, over/under voltage, over/under frequency, reverse power, loss-of-excitation, V/Hz overfluxing and accidental energization protection. It serves as primary or backup protection for grid-tied, island and cogeneration generator sets.

Multi-Channel Temperature and Analog Monitoring

It has 12 RTD inputs to monitor stator winding and bearing temperature. 4 configurable analog inputs are available for vibration and other auxiliary process signals. Configurable 4–20 mA analog outputs transmit measured data to DCS or local indicators.

Built-in Fault Recording and Event Logging

Oscillography captures waveforms up to 64 cycles, together with sequence-of-event recording. IRIG-B time synchronization is supported for fast fault analysis. Built-in waveform simulation allows setpoint verification and commissioning without external test equipment.

Diverse Communication Interfaces and Standard Protocols

Equipped with dual serial ports (RS232 / RS485) and 10BASE-T Ethernet. Supported protocols include Modbus RTU, Modbus TCP and DNP3.0. Measured data, alarms and fault records can be uploaded to SCADA, DCS and monitoring systems, ideal for networking upgrades of distributed power plants.

Draw-out Plug-in Design

The withdrawable main unit can be extracted for maintenance without removing secondary wiring, shortening maintenance downtime and simplifying on-site replacement and testing.

Local Human-Machine Interface

The front panel is fitted with a large display, full-function keypad and 22 LED status indicators. Users can check electrical readings, temperature data and fault information locally, and adjust protection settings without a PC for routine checks.

Integrated Metering and Control Logic

It performs real-time RMS measurement of three-phase current, voltage, active/reactive power, power factor and negative sequence current. Programmable digital inputs and output relays support breaker control, excitation supervision and interlock logic configuration.

Robust Environmental Compatibility

Industrial-grade hardware adapts to power plant, chemical, mining and marine power applications. For this model, P5 stands for 5A CT secondary rating, HI represents enhanced hardware, and A20-T indicates wide auxiliary power range and upgraded temperature resistance.

Flexible Configuration and Simple Commissioning

Compatible with dedicated URPC configuration software. All protection elements, logic, communication and alarm parameters are configurable via software to match generators of different capacities and grid connection conditions.

High-reliability Self-diagnosis

It continuously monitors hardware, CT/PT circuits and power supply. An alarm will be triggered and fault data logged once internal faults or wiring anomalies are detected.

FAQ for GE SR489-P5-HI-A20-T Generator Protection Relay

Q: What is GE SR489-P5-HI-A20-T?

A: The GE SR489-P5-HI-A20-T is a Multilin SR489 generator protection relay, designed for generator and motor protection, monitoring and control in power systems.

Q: What protection functions does SR489-P5-HI-A20-T provide?

A: It offers overcurrent, overvoltage, undervoltage, overfrequency, underfrequency, reverse power, loss of excitation and thermal overload protection for generators and large motors.

Q: What communication protocols does SR489-P5-HI-A20-T support?

A: It supports Modbus RTU, Modbus TCP and DNP3 protocols, available for connecting to SCADA and HMI systems for remote monitoring.

Q: What software is used to configure the SR489-P5-HI-A20-T?

A: The configuration, setting and fault analysis are completed via GE EnerVista software.

Q: Which applications are suitable for SR489-P5-HI-A20-T?

A: It is widely used in hydro power plants, diesel generator sets, cogeneration systems, industrial powerhouses and mining power distribution systems.

Q: Is the GE SR489-P5-HI-A20-T discontinued?

A: Yes, this SR489 series relay is end of production. We supply original surplus and fully tested units for maintenance and retrofit replacement.

Q: Does SR489-P5-HI-A20-T support fault event recording?

A: Yes, it can record fault waveforms, event logs and metering data for post-fault analysis.

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