General Electric SR489-P1-HI-A20-E Generator Management Relay

The SR489-P1-HI-A20-E Generator Management Relay from GE Multilin is designed for the protection and management of synchronous and induction generators. Part of the 489 Generator Management Relay series, this relay provides critical trip and alarm protections to ensure the reliable operation of electrical power generation systems. The "P1" code indicates phase current input using one-ampere phase CT secondaries, while the "E" designation denotes an enhanced display with a larger LCD screen for improved visibility. It is ideal for applications requiring precise monitoring of voltage, frequency, and current.

Technical Specifications

• Damped Oscillation Test Level: 2.5 kV, 1.0 MHz

• Ground Overcurrent Curve Shapes:

• ANSI

• IEC

• IAC

• Flexcurve

• Definite Time

• Mounting Method:

• Panel Mount or 19" Rack Mount

• Operating Temperature Range:

• -40°C to 60°C

• Production Tests Dielectric Strength:

• 1.9 kV AC for 1 second or 1.6 kV AC for 1 minute (per UL 508)

• Shipping Weight: 7.7 kg

• Tachometer Duty Cycle: 10%

• Trip Coil Supervision Trickle Current: 2 to 5 mA

• Underfrequency Pickup Accuracy: ±0.02 Hz

Key Features

• Generator Protection: Provides advanced trip and alarm protections for synchronous and induction generators, ensuring optimal performance and preventing system failures.

• Enhanced Display: Features an LCD screen with a larger display size for improved readability and ease of use.

• Comprehensive Ground Overcurrent Protection: Multiple ground overcurrent curve shapes (ANSI, IEC, IAC, Flexcurve, and Definite Time) to cover a wide range of protection requirements.

• Tachometer Monitoring: Designed for tachometer duty cycles, supporting accurate frequency measurements.

• Precise Underfrequency Protection: Underfrequency pickup accuracy of ±0.02 Hz ensures highly precise detection and protection against underfrequency conditions.

• Versatile Mounting Options: Can be panel-mounted or installed in a 19-inch rack for flexible integration into control systems.

• Robust Dielectric Strength: Tested to meet strict dielectric standards with a 1.9 kV AC dielectric strength for 1 second or 1.6 kV AC for 1 minute, as per UL 508 standards.

• Wide Operating Temperature Range: Designed to operate in extreme conditions with a temperature range from -40°C to 60°C.