DEIF FAS-2R

  • Product Name:​ DEIF FAS-2R Automatic Synchronizer Module (Generator-to-Busbar Synchronization)
  • Product Introduction:​ A compact synchronizer from DEIF’s FAS series used in genset control panels to automatically match generator voltage, frequency, and phase angle with the mains/busbar before closing the breaker. Often paired with DEIF AGC/AMF or LSU load-sharing units.
Category:
Description
  • Technical Specifications:
    • Function:​ Dynamic synchronization (voltage match, freq match, phase-angle window detection)
    • Measurement Inputs:​ 3-phase voltage (gen & bus), frequency range 45–65 Hz
    • Voltage Input Range:​ typically 100–500 V L-L (depends on CT/PT ratio)
    • Sync Window:​ Adjustable voltage deviation (±2 % to ±12 %), frequency deviation (±0.05–±0.5 Hz), phase angle deadband (typ. ±5° to ±15°)
    • Breaker Close Command:​ Pulse output (adjustable lead-time compensation 0–400 ms)
    • Speed / Voltage Control Outputs:​ Analog ± outputs to raise/lower governor & AVR (for fine-tuning before close)
    • Supply Voltage:​ 24 VDC (±20 %) or 110/230 VAC 50/60 Hz (model dependent)
    • Outputs:​ Relay contacts for Sync OK, Breaker Close Permissive; SG (speed govern) raise/lower relays
    • Mounting:​ 35 mm DIN rail or panel mount
    • Operating Temp.:​ -20 °C to +70 °C
    • Approvals:​ CE, DNV, GL, ABS (marine & industrial)
  • Working Principle:​ Continuously measures generator and busbar voltage/frequency/phase. When all three parameters fall within the adjustable sync window AND the computed breaker-closure time matches the deadband, a close-pulse is issued. Before closing, analog outputs nudge the engine governor and AVR to minimize deviation.
  • Installation & Notes:​ PT primary/secondary ratios must be correctly set via DIP switches or software. Ensure close-pulse duration matches actual breaker make-time (adjust pot). Do NOT use on systems with significant harmonic distortion without filtering. Phase sequence must be verified before energizing.
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