GE Multilin SR489 SR489-P5-LO-A20-E Generator Management Relay

GE SR489-P5-L0-A20-E Introduction & Technical Specifications
Product Introduction
The SR489-P5-L0-A20-E is a high-performance protective relay from GE (General Electric), designed for precise overcurrent, overload, and fault protection in industrial electrical systems. Engineered with robust circuitry and reliable operation, this relay delivers fast response to electrical anomalies, safeguarding motors, transformers, and distribution equipment while ensuring system stability and minimizing downtime.

Technical Specifications
General Specifications
Brand: General Electric (GE); Model: SR489-P5-L0-A20-E; Product Series: SR489 Protective Relay Series; Function: Overcurrent/Overload Protection Relay; Design Standard: IEC/ANSI Compliant.
Dimensions
The relay features a compact design with a length of 140 mm (5.51 inches), width of 110 mm (4.33 inches), and height of 75 mm (2.95 inches). The installation footprint is optimized for panel-mounted applications in tight spaces.
Weight
Net weight is 380 grams (0.84 pounds), and gross weight (including packaging and accessories) is 550 grams (1.21 pounds), facilitating easy handling and installation.
Temperature & Environmental Range
Operating temperature ranges from -20°C to +65°C (-4°F to +149°F), with a storage temperature range of -40°C to +85°C (-40°F to +185°F). It supports a humidity range of 10% to 90% non-condensing and is resistant to dust and vibration (IP20 protection rating).

Input Specifications
Input Type: AC Current Input; Rated Input Current: 5 A AC (secondary side of current transformer); Input Frequency: 50/60 Hz (auto-adaptive); Measurement Accuracy: ±0.5% Full Scale; Pickup Current Range: 0.5x to 10x Rated Input (adjustable).
Output Specifications
Output Type: Electromechanical Relay Contacts; Number of Output Contacts: 2 Form C (NO/NC) Contacts; Contact Rating: 5 A @ 250 VAC / 30 VDC (resistive load); Trip Response Time: ≤ 50 ms (at 10x Rated Input); Reset Type: Manual/Auto Reset (selectable via front panel switch).
Application Scenarios
Ideal for industrial electrical protection systems, the SR489-P5-L0-A20-E is widely used in manufacturing plants (motor protection for pumps, fans, and conveyors), power distribution systems (transformer and feeder protection), oil and gas facilities (electrical equipment protection in upstream/downstream operations), commercial buildings (HVAC system motor protection), and renewable energy plants (solar/wind farm auxiliary equipment protection). It is compatible with both new installations and retrofits of existing control panels.