Three-phase voltage monitor monitors overvoltage and undervoltage between the phases. In addition to its own supply voltage, the relay monitors undervoltage and overvoltage (separate setting). An adjustable reaction time allows the output relay to be blocked in the event of short-term faults. If a voltage fault occurs, the relay opens after the delay set by the user. If a phase fails, the relay opens immediately without waiting for the delay. If a fault is detected when the device is switched on, the relay does not pick up. Approvals: UL and CSA.
