GE SR489-P5-LO-A20-E is a generator management relay produced by GE's Multilin division. The following is a detailed introduction to the product:

1、 Product Overview

As part of the Multilin 489 series, SR489-P5-LO-A20-E is designed specifically for generator protection and can be used for induction or synchronous generators. It integrates GE's advanced technology in generator protection and control, providing users with high-performance, high reliability, and easy-to-use solutions.

2、 Main functions and features

Protection and regulation functions:

Equipped with comprehensive protection functions such as overload protection, short circuit protection, undervoltage protection, and overvoltage protection.

It can automatically adjust according to the actual situation of the generator, maintain stable operation of the generator, and improve power generation efficiency.

Display and operation:

Featuring a 40 character display screen that allows users to view value messages, diagnostics, and setpoints.

The front panel includes multiple status LEDs, input buttons, numeric keypad, input ports, and an LCD screen for reading device location information, making it easy for users to view and operate the status and functions of relays.

Electrical parameters:

Can operate at 25, 50, or 60 hertz.

The frequency parameter range is 0.00 to 90.00 Hz.

The zero line voltage (3rd parameter) ranges from 0 to 25000 V.

The power factor parameter range is 0.01 to 1.00 lead/lag.

The reactive power (Mvar) parameter range is -2.00 to 2.00 times the rated voltage.

Communication and Interface:

The rear panel includes twelve RTD inputs, six output relays, two RS485 communication ports, and four VT inputs.

The communication port can use Modbus RTU or DNP 3.0 protocol (or both), with a maximum speed of 19200 bps.

The rear panel also includes four isolated 4-20 mA analog inputs and outputs, as well as seven assignable digital inputs.

Structure and Design:

Compact structure, small size, easy to install and maintain.

The shipping weight is approximately 10 kilograms, and the dimensions are 21.6 centimeters (length) x 22.4 centimeters (width) x 25.2 centimeters (height).

3、 Technical specifications

In addition to the above functional features, SR489-P5-LO-A20-E also has the following technical specifications:

Relay parameters: 5A phase CT secondary, LO control power of 20-60 VDC, 48-62 VAC at 20-48 Hz, analog output of 4 to 20 mA.

Overload capacity: 150% rated current can last for 60 seconds, 180% rated current can last for 3 seconds.

Input meets SWC, C37.990 EMI, RFI anti-interference requirements.

4、 Application Fields

SR489-P5-LO-A20-E is suitable for various generator management and protection applications, such as power plants, hydropower stations, wind power plants, etc. It can provide comprehensive protection and control functions for generators, ensuring their stable operation and efficient power generation.