Description

Product Overview

The GE SR489-P5-LO-A20-E is a microprocessor-based motor protection relay designed for critical industrial applications requiring advanced monitoring, control, and protection of medium to large motors. Manufactured by General Electric (GE), a global leader in power and automation solutions, this relay is part of the Multilin 489 series, renowned for its high-performance architecture and comprehensive protection capabilities. The GE SR489-P5-LO-A20-E serves as a core component in motor control centers (MCCs), industrial pumps, compressors, and conveyor systems, ensuring reliable operation and preventing costly downtime.

With 5A phase CT inputs and support for 90–300V DC / 70–265V AC control power, the GE SR489-P5-LO-A20-E delivers precise protection against overloads, short circuits, phase imbalances, and ground faults. Its advanced thermal model continuously monitors motor temperature based on load current, ambient conditions, and motor thermal characteristics, preventing overheating and extending motor lifespan. The relay’s programmable logic controller (PLC) functionality enables custom control sequences, such as interlocking, permissive logic, and alarm management, enhancing system flexibility.

The GE SR489-P5-LO-A20-E features a graphical LCD display with intuitive navigation, allowing operators to view real-time data, configure settings, and analyze fault records. Its communication ports (RS-232/RS-485, Modbus RTU/TCP) enable seamless integration with SCADA systems, PLCs, and industrial networks, facilitating remote monitoring and predictive maintenance. Designed for harsh environments, the relay is housed in a rugged enclosure with conformal coating options, ensuring reliable performance in dusty, humid, or corrosive settings.

Technical Specifications

Parameter Name	Parameter Value
Product Model	GE SR489-P5-LO-A20-E
Manufacturer	General Electric
Product Type	Motor Protection Relay (Multilin 489 Series)
Control Power	90–300V DC / 70–265V AC
Frequency Range	48–62 Hz
Phase Current Inputs	5A (CT secondaries)
Neutral Current Input	1A (CT secondary)
Analog Outputs	4 x 4–20 mA (isolated)
Digital Inputs	9 x optically isolated
Digital Outputs	6 x programmable relays (Form C)
Communication	RS-232, RS-485, Modbus RTU/TCP, Ethernet (optional)
Display	240 x 128 pixel graphical LCD with backlight
Operating Temperature	-20°C to 60°C
Storage Temperature	-40°C to 85°C
Enclosure Rating	IP20
Physical Dimensions	21.5 cm × 23 cm × 25 cm (8.5” × 9” × 9.8”)
Weight	7.36 kg

Key Features and Advantages

Comprehensive Protection

The GE SR489-P5-LO-A20-E offers multiple protection functions, including overload, short circuit, phase unbalance, under/overvoltage, thermal imaging, and ground fault protection. Its adaptive protection curves adjust dynamically based on motor characteristics and operating conditions, ensuring optimal protection without nuisance tripping.

Advanced Thermal Management

The relay’s thermal model calculates motor temperature in real-time, considering load current, ambient temperature, and motor thermal time constants. This feature prevents overheating and allows predictive maintenance, reducing unexpected downtime and extending motor life.

Flexible Control Logic

With programmable logic capabilities, the relay supports custom control sequences, such as starting interlocks, run permissives, and alarm management. This eliminates the need for external PLCs in many applications, simplifying system design and reducing costs.

Enhanced Communication

The GE SR489-P5-LO-A20-E features Modbus RTU/TCP communication for seamless integration with industrial networks. Optional Ethernet connectivity enables remote monitoring, configuration, and firmware updates, enhancing system visibility and management efficiency.

User-Friendly Interface

The graphical LCD display provides intuitive navigation and real-time data visualization, including current, voltage, power, and energy metrics. The relay’s event recorder captures up to 1000 events with timestamping, facilitating root cause analysis of faults.

Rugged Design

Designed for harsh industrial environments, the relay’s enclosure resists dust and moisture, while optional conformal coating protects against corrosion. This ensures reliable operation in demanding settings such as oil refineries, mining operations, and chemical plants.

Application Areas

Oil & Gas

The GE SR489-P5-LO-A20-E protects pumps, compressors, and fans in offshore platforms and onshore facilities, ensuring continuous operation in harsh environments. Its advanced thermal protection and communication capabilities enable predictive maintenance, minimizing downtime in critical processes.

Power Generation

In power plants, the relay safeguards boiler feed pumps, cooling tower fans, and generator auxiliary motors against electrical and thermal faults. Its precise protection and monitoring features help maintain grid stability and prevent equipment damage.

Manufacturing

For conveyor systems, mixers, and industrial machinery in manufacturing plants, the relay ensures reliable motor operation and protects against costly downtime. Its programmable logic functionality enables custom control sequences tailored to specific production requirements.

Water & Wastewater

In water treatment facilities, the GE SR489-P5-LO-A20-E controls pumps, blowers, and agitators, providing protection against overloads and phase imbalances. Its remote monitoring capabilities allow operators to manage systems efficiently from centralized control rooms.

Installation and Maintenance

Installation Preparation:

Mounting: Install the relay in a 19-inch rack or panel using the provided brackets. Ensure proper ventilation to prevent overheating.
Wiring: Connect CTs and VTs according to the wiring diagram, ensuring correct phase orientation. Use shielded cables for communication ports to minimize interference.
Configuration: Use EnerVista software to configure protection settings, thermal model parameters, and communication protocols. Upload the configuration to the relay via the RS-232 or USB port.

Maintenance Recommendations:

Regular Inspections: Check the relay’s display for alarms and monitor key parameters such as current, voltage, and temperature. Inspect terminals for tight connections and signs of overheating.
Firmware Updates: Periodically update the relay’s firmware to access the latest features and bug fixes.
Functional Testing: Perform annual functional tests to verify protection and control functions using a test set.
Spare Parts: Maintain a spare GE SR489-P5-LO-A20-E relay and essential accessories (e.g., CTs, fuses) to minimize downtime during replacements.

Product Warranty and Support

GE provides a 1-year warranty for the SR489-P5-LO-A20-E, covering defects in materials and workmanship. The module is 100% brand new and factory-sealed, ensuring compliance with original specifications.

For technical support, GE’s global service network offers 24/7 assistance for system integration, diagnostics, and repair. Customers can access online resources and training programs to optimize the relay’s performance and safety protocols.

With spot inventory available, GE ensures 3-day delivery after payment, reducing operational risks associated with component shortages.

Contact info

WhatsApp: +86 18030182217
Email: sandydcsplc@gmail.com
Phone: +86 18030182217
Wechat: +86 18030182217
Website: www.xiongbaparts.com

GE SR489-P5-LO-A20-E Motor Protection Relay (Multilin 489 Series)(XIONGBA)