Product Introduction

The 489-P5-LO-A20-E is a GE Multi-Line relay in the GE SR Series of relays and is in the same family as the GE Multi-Line 469 Motor Protection Relay and the GE Multi-Line 735 Feeder Protection Relay. The 489-P5-LO-A20-E is designed for generator protection and can be used with either induction or synchronous generators. The unit can operate at 25, 50, or 60 Hz. The 489-P5-LO-A20-E is designed with a 40-character display that allows the user to view numerical information, diagnostics, and setpoints. The front panel includes a numeric keypad, status indicator, numerical up and down keys, RS232 port interface, and control and programming keys including Reset, Enter, Menu, Menu Up, and Menu Down keys. This allows control without connecting an external computer.

The back panel includes 12 RTD inputs, 6 output relays, 2 RS485 communication ports, and 4 VT inputs. The RTD is field programmable. The communication port can use ModbusRTU or DNP 3.0 protocol up to 19200 bps or both. The backplane of the 489-P5-LO-A20-E also includes four isolated 4-20 mA analog inputs and outputs and seven assignable digital inputs. There are seven CT inputs for three-phase output/three-phase neutral and ground current detection, as well as an independent safety and filter ground. All inputs on the 489-P5-LO-A20-E meet SWC, C37.990 EMI, RFI immunity.

GE Relay SR489-P5-LO-A20-E is an advanced protection relay produced by Multilin, mainly used for the protection and control of generators and other critical equipment. The following is a detailed introduction to its main functions:
Generator Protection
This relay is specially designed for the protection of generators. It can monitor various operating parameters of the generator, such as current, voltage, frequency, etc., and quickly initiate protection measures when abnormal conditions (such as overload, short circuit, undervoltage, etc.) are detected to ensure the safe operation of the generator.

Multiple protection functions
SR489-P5-LO-A20-E provides multiple protection functions, including overcurrent protection, undervoltage protection, overvoltage protection, frequency protection, etc. These functions can be configured through the programming interface of the relay to adapt to different application requirements.

Digital control
The relay adopts digital technology and has the characteristics of high precision and high reliability. It can perform complex calculations and analysis through a digital signal processor (DSP) to provide precise protection and control functions.

Easy to integrate
SR489-P5-LO-A20-E has a compact design and is easy to integrate with other control systems. It supports multiple communication protocols such as Modbus, Profibus, etc., and can easily communicate with other devices such as SCADA systems, PLCs, etc.

User-friendly interface
The relay is equipped with a user-friendly interface, which makes the setting and debugging process easier. Operators can set parameters and monitor status through the liquid crystal display (LCD) and keys.

Real-time monitoring
The SR489-P5-LO-A20-E has a real-time monitoring function that can continuously monitor the operating status of the generator and immediately issue an alarm when an abnormality occurs. This helps to detect and solve potential problems in a timely manner, improving the reliability and stability of the system.

GE Relay SR489-P5-LO-A20-E | Multilin 489 is a powerful and flexible protection relay suitable for the protection and control of generators and other critical equipment in various industrial environments. Its multiple protection functions, digital control, easy integration and real-time monitoring make it an important part of the power system and industrial automation field.

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