GE SR489-P5-HI-A20 Generator Management Relay

SR489-P5-HI-A20 Technical Specifications

Damped Oscillation Reference Standard	IEEE/ANSI C37.90.1
General Input A to G Configurable	Assignable Digital Inputs 1 to 7
Ground Overcurrent Curve Shapes	ANSI, IEC, IAC, Flexcurve, Definite Time
High Set Phase Overcurrent Timing Accuracy	±50 ms at 50/60 Hz or ±0.5% total time
Humidity	Operating up to 95% (Non-Condensing)
Loss of Excitation (Impedance) Elements	Trip, 2 Zones Using Impedance Circles
Phase Differential Pickup Accuracy	As Per Phase Current Inputs
Pulse Output Parameters	+ kwh, +kvarh, –kvarh
Radiated and Conducted Emissions	Class A
RF Immunity Test Level	Level 3

About the SR489-P5-HI-A20

Relay Model SR489-P5-HI-A20 Unique Hardware

SR489-P5-HI-A20 is a generator management relay that is manufactured by GE Multilin for the 489 series. This relay has 5 A phase CT secondaries. The HI control power is 90-300 VDC and 70265 VAC at 48-62 Hz. The analog outputs on this relay are 4 to 20 mA. This relay has a basic display. When the relay is energized, the relay contacts are unsafe to touch. It is the customer’s responsibility to ensure proper insulation levels if the output relay contacts are required for low voltage accessible applications. The fuse current rating is 2.5 A. The fuse type is 5x20mm HRC SLO-BLO Littelfuse, and the fuse model is 215-02.5. The order code for this series tells the user a few details about the part:

489 indicates the series that this part comes from
Next two digits are the phase current inputs
- which are either P1 (1 A phase CT secondaries) or P5 (5 A phase CT secondaries)
Next two digits are the control power
- either LO (20-60 VDC and 20-48 VAC at 48-62 Hz) or HI (90-300 VDC and 70-265 VAC at 48-62 Hz)

The next two or three digits are the analog outputs, which are either A1 (0 to 1 mA analog outputs) or A20 (4 to 20 mA analog outputs). The next digit is the display, which is either blank (basic display), E (enhanced display with a larger LCD), or T (enhanced display with Ethernet 10Base-T). The next digit is the harsh environment protection, wherein H is the chemical environment conformal coating.