Undervoltage Monitoring / DUW-C12

Undervoltage monitoring in three-phase networks (each phase relative to the neutral conductor) with a fixed threshold value, fixed hysteresis, and an integrated test button. It was specifically developed for emergency lighting systems in accordance with DIN VDE 0108. The device can also be used to monitor a single phase. All unused inputs must be connected to the connected phase. If a reverse voltage caused by the load exceeds the set threshold value, no error signal is generated. OK signal: Relay is energized (contacts 11–14 and 21–24 closed), LED is off. Fault signal: Relay has dropped out (contacts 11–14 and 21–24 open), LED is on. Button press: Relay drops out (contacts 11–14 and 21–24 open), LED turns on.
Connection via screw terminals.