GE 489-P1-LO-A20-T-H 489 Series Motor Management Relay

GE  489-P1-LO-A20-T-H  489 series motor management relay

Power Characteristics

• The control power supply is of "LO" type, supporting 20-60VDC or 20-48VAC (48-62Hz), suitable for low-voltage system scenarios such as DC UPS and photovoltaic inverters.

I/O Configuration

• Phase current input: 1A CT secondary.

• 2-channel 4-20mA analog output (A20 code) to transmit parameters like current and temperature to PLC or DCS systems.

• Typically equipped with multiple digital inputs and relay outputs for logic control, such as 5 programmable digital inputs (compatible with dry/wet contacts) and 4 relay outputs (rated 5A@250VAC).

Protection Functions

• Provides various electrical fault protection functions, including overcurrent protection, undervoltage protection, ground fault protection, etc., to ensure the stable operation of the motor system.

• May also include functions such as locked rotor protection, phase sequence protection, temperature monitoring, and thermal protection. It can monitor the temperature of motor windings or bearings by connecting PT100 temperature sensors.

Communication Capabilities

• Standard RS485 interface supporting Modbus RTU protocol, with a maximum communication rate of 115.2kbps for multi-device networking.

• May have other optional communication interfaces to facilitate communication with computers or other devices for remote monitoring and control.

Display Features

• May be equipped with an LCD display to show motor operating parameters, fault information, etc., for convenient on-site viewing and configuration. Some similar models have a 40-character display, and the front panel includes multiple status LEDs, input buttons, a numeric keypad, etc.

Environmental Adaptability

• With high reliability, it uses high-quality electronic components and advanced manufacturing processes. After strict quality control and testing, it can work stably in harsh environments.

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Application IndustriesPower Industry

• Used for power system protection, providing overload, short-circuit, undervoltage, ground fault protection for transformers, generators, switchgear, etc., to ensure stable power system operation.

• Also applied to power equipment monitoring, transmitting equipment status information to the monitoring system via communication interfaces for remote monitoring and control.

Petroleum Industry

• In petroleum extraction and refining, it protects and controls various equipment such as motors, pumps, and compressors, preventing equipment damage or production accidents caused by electrical faults and ensuring the continuity and safety of petroleum production.

Metallurgical Industry

• Equipment like blast furnaces and rolling mills in metallurgical production require stable and reliable power supply. The relay protects related electrical equipment and collaborates with automation control systems to achieve remote equipment control and status monitoring, improving production efficiency and automation levels.

Chemical Industry

• The chemical production process involves many flammable and explosive substances, requiring strict safety for electrical equipment. The relay controls and protects motors, valves, and other equipment in chemical production units. Its multiple protection functions effectively prevent safety accidents caused by electrical faults, while remote monitoring via communication interfaces allows operators to manage operations from safe areas.

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Sewage Treatment Industry

• Applied to the control and protection of pumps, fans, and other equipment in sewage treatment plants. It automatically controls equipment operation based on parameters such as water quality and quantity, while protecting equipment against overload, short-circuit, etc., to ensure the normal operation of the sewage treatment system.

Paper and Textile Industries

• In paper and textile production, there are numerous motor-driven equipment, such as the drive motors of paper machines and the spindle motors of textile machines. The relay protects these motors from affecting production processes due to motor failures and achieves precise control and automated operation of the production process by connecting with automation control systems.

Water Conservancy Industry

• Plays a role in the motor control and protection of facilities like pumping stations and sluices in water conservancy projects. It controls the start and stop of pumps based on signals such as water level and flow, while protecting motors to ensure the normal operation of water conservancy facilities and the rational allocation of water resources.