The GE SR489-P5-LO-A20-E is an advanced generator management relay specifically engineered to protect generators against low overload conditions. This relay combines sophisticated protection algorithms with comprehensive monitoring capabilities to ensure generator stability and prevent damage from sustained low-level overloads.

Key Technical Features:

• Low Overload Protection: Specialized algorithms detect and respond to sustained low-level overload conditions

• Thermal Model Protection: Advanced thermal modeling provides accurate rotor and stator protection

• Load Encroachment Monitoring: Prevents unnecessary tripping during stable power swings

• Oscillation Detection: Identifies and responds to power oscillations

• Comprehensive Metering: Real-time monitoring of electrical parameters

Technical Specifications:

• Frequency Range: 15-75 Hz

• Voltage Inputs: 3-phase voltage measurements

• Current Inputs: 3-phase + neutral current

• Protection Functions: 27/50/51/59/81O/81U

• Communication Protocols: Modbus, DNP3, IEC 61850

• Operating Temperature: -40°C to +70°C

• Display: Backlit LCD interface

Typical Applications:

• Industrial generator protection

• Peak shaving generators

• Standby power systems

• Cogeneration plants

• Distributed generation resources

The SR489-P5-LO-A20-E demonstrates GE's expertise in generator protection technology, providing reliable low overload protection that extends generator life and ensures system stability in various power generation applications.