Core Features
Full dimensional protection: covering stator differential, 100% stator grounding, demagnetization/overexcitation, reverse power, overcurrent/undercurrent, overvoltage/undervoltage, frequency abnormality, etc. The microprocessor drives rapid tripping (about 10ms) to ensure the safety of the generator.
Enhanced human-computer interaction: 40 character LCD large screen+LED indicator lights+numeric keypad, supporting local parameter settings, fault diagnosis, and event recording traceability, with a pull-out structure for easy maintenance and replacement.
Flexible integration and expansion: 8 channels of 4-20mA analog outputs can be connected to DCS/PLC, 6 programmable relays are adapted to the unit control logic, and the communication interface supports remote monitoring and data uploading.
Accurate state monitoring: 12 channel RTD input monitors stator and bearing temperature, real-time collects parameters such as current, voltage, power, frequency, etc., supports waveform recording and pre fault data tracing for easy maintenance and analysis.
Low voltage adaptation: LO low range power supply design, suitable for low voltage power supply scenarios such as 24V/48V, such as small self owned power plants and distributed generation systems.
Application scenarios
Main or backup protection for small and medium-sized synchronous/asynchronous generators with low voltage power supply, such as small self owned power plants, distributed power generation, and cogeneration.
Power generation equipment for data centers, commercial buildings, and small industrial facilities, used for comprehensive protection of generator stator, rotor, and electrical circuits.
A generator system that does not require conformal coating and has a control power supply of 24-60VDC/20-48VAC in a conventional industrial environment.

GE SR489-P5-LO-A20-E｜Motor Management Relay｜