Fanox Control & Measurement

Fanox U3-S / U3-N – Three-Phase Voltage Control Relay | Phase Loss & Sequence

SKU FANOX-U3
Fanox U3-S/U3-N self-powered 3-phase voltage relay. Monitors phase variations, incorrect sequence, and phase loss. Adjustable min/max thresholds and trip delay.
DIN Rail CE Certified
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Fanox U3-S / U3-N – Three-Phase Voltage Control Relay

The Fanox U3-S and U3-N protect 3-phase installations against voltage imbalance, incorrect phase sequence, and complete phase loss. Self-powered by the monitored three-phase voltage, these relays feature adjustment potentiometers that eliminate the need to calculate threshold percentages — simplifying installation and commissioning significantly.

  • Protects 3-phase installations against: voltage variations between phases, incorrect phase sequence, phase loss
  • Self-powered by the 3-phase monitored voltage
  • Adjustable minimum and maximum voltage thresholds (potentiometer — no calculation required)
  • Adjustable trip time delay
  • Visual LED indication of trip cause
  • DIN rail mounting
  • Variants: U3-S (standard), U3-N (neutral connection)