L90

Overview

The GE Fanuc L90 is a line differential protection relay designed for reliable monitoring, event recording, and data logging with advanced protection features.

Monitoring & Data Logging

• Oscillography: 64 max records, 64 samples per cycle
• Event Recorder: 1024 events, 1 µs time-tag
• Data Logger: 1 to 16 channels, sampling rates up to 60 minutes

Power Supply

• Low Range: 24–48 V DC, 3 A
• High Range: 125–250 V DC, 100–240 V AC, 0.7 A
• Power Consumption: 35 VA typical, 75 VA max

Metering Accuracy

• RMS Current: ±0.25% at 0.1–2.0 × CT rating
• RMS Voltage: ±0.5% from 10 to 208 V
• Apparent Power: ±1.0%
• Real Power: ±1.0% at power factor 0.8 to 1.0
• Reactive Power: ±1.0% at power factor -0.2 to 0.2
• Watt-Hours & VAR-Hours: ±2.0%, up to ±2 × 10⁹ MWh or Mvarh

Interrupting Capacity

• AC: 100,000 A RMS symmetrical
• DC: 10,000 A

Fusing & Voltage Withstand

• Internal Fuses: 7.5 A (low range), 5 A (high range)
• Voltage Withstand: 2 × nominal voltage for 10 ms

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