GE SR489-P5-LO-A20-E is a GE Multilin relay in the GE SR relay series, designed specifically for generator protection and can be used for induction or synchronous generators. The following is a detailed introduction about the relay:
1、 Main functions and features
Generator protection: designed specifically for generators, providing comprehensive protection functions to ensure the safe and stable operation of the generator.
Multiple frequency support: It can operate at frequencies of 25, 50, or 60Hz to meet the power standard requirements of different countries and regions.
Display screen and operation interface:
Design a 40 character display screen that allows users to view value messages, diagnostics, and set values.
The front panel is equipped with a numeric keypad, status indicator lights, value up and down keys, RS232 port interface, and control and programming keys (including reset key, enter key, menu key, etc.), supporting control without connecting to an external computer.
Rear panel interface:
Includes 12 RTD inputs for temperature monitoring.
Six output relays are used to perform protective actions or control functions.
Two RS485 communication ports, supporting Modbus RTU or DNP 3.0 protocol (or both), with a maximum communication speed of 19200bps.
4 VT (Voltage Transformer) inputs for voltage monitoring.
Four isolated 4-20mA analog inputs and outputs are used for monitoring and controlling analog quantities such as current and voltage.
7 assignable digital inputs for receiving external signals or switch states.
CT (current transformer) input: 7 CT inputs, used for three-phase output/three-phase neutral line and ground current detection, as well as a separate safety and filter ground.
Anti interference: All inputs comply with SWC, C37.990 EMI, RFI anti-interference standards, ensuring stable operation in harsh electromagnetic environments.
2、 Application and advantages
Application scenarios:
Suitable for induction or synchronous generators of various scales, providing comprehensive electrical protection.
It can be widely used in industrial fields such as power, petrochemicals, metallurgy, etc. to ensure the safe and stable operation of generators.
Advantages:
Provide comprehensive protection functions, including overcurrent, overvoltage, undervoltage, grounding faults, etc.
Equipped with high-precision and high reliability measurement and monitoring functions, ensuring that the operating parameters of the generator are within the allowable range.
Supports multiple communication protocols and interfaces, facilitating integration and data exchange with other devices and systems.
Compact design and easy installation reduce the complexity and maintenance costs of the system.
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