SR489-P5-LO-A20-E

Description

The SR489-P5-LO-A20-E from GE Multilin is a generator management relay designed for advanced protection functions, including overcurrent, offline conditions, and inadvertent energization. It features programmable curves, precise timing, and flexible pickup levels.

Overcurrent Alarm

• Pickup Level: 0.10–1.50 × FLA (0.01 steps, avg phase current)

• Time Delay: 0.1–250.0 s (0.1 s steps)

• Pickup Accuracy: Matches phase current inputs

• Timing Accuracy: ±100 ms or ±0.5%

Offline Overcurrent

• Pickup Level: 0.05–1.00 × CT (0.01 steps, any phase)

• Time Delay: 3–99 cycles (1 cycle steps)

• Pickup Accuracy: Matches phase current inputs

• Timing Accuracy: ±50 ms @ 50/60 Hz

Inadvertent Energization

• Arming Signal: Based on undervoltage or breaker status

• Pickup Level: 0.05–3.00 × CT (0.01 steps, any phase)

• Time Delay: No intentional delay

• Pickup Accuracy: Matches phase current inputs

• Timing Accuracy: ±50 ms @ 50/60 Hz

Phase Overcurrent

• Voltage Restraint: Programmable fixed characteristic

• Pickup Level: 0.15–20.00 × CT (0.01 steps, any phase)

• Curve Shapes: ANSI, IEC, IAC, Flexcurve, Definite Time

• Time Delay: 0.000–100.000 s (0.001 s steps)

• Pickup Accuracy: Matches phase current inputs

• Timing Accuracy: ±50 ms @ 50/60 Hz or ±0.5%

Negative Sequence Overcurrent

• Pickup Level: 3–100% FLA (1% steps)

• Curve Shape: I²t (k-defined), definite time alarm

• Time Delay: 0.1–100.0 s (0.1 s steps)

• Pickup Accuracy: Matches phase current inputs

• Timing Accuracy: ±100 ms or ±0.5%

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