Carlo Gavazzi – EUA C 400 – 3‑Phase Voltage/Sequence Control Relay, DIN‑Rail

The Carlo Gavazzi EUA C 400 is a compact, DIN-rail mount relay that monitors three-phase voltage and phase sequence. It protects motors and equipment by detecting phase loss, asymmetry, over/undervoltage, and incorrect phasing, automatically disconnecting faulty supplies. Adjustable trip thresholds from 340–460 V (for 400 V systems) make it suitable for diverse industrial environments.

Key Features:

• Model: EUA C 400 (aka EUAC400)  

• Function: Monitors voltage, phase sequence, and asymmetry; trips on faults

• Supply Range: Configurable dial: 340–460 V line-to-line for 400 V nominal systems ()

• Phase Sequence: Correct phase rotation required for operation

• Mounting: DIN-rail format; standard width