Undervoltage Network Monitoring BTR DUW-C12

BTR DUW-C12Sub-voltage monitoring of a three-phase network (each phase before neutral) with fixed threshold, fixed hysteresis and integrated test button. It was designed specifically for emergency lighting systems with DIN VDE 0108th The device can also be used to monitor a single phase. All unused inputs must be connected to the connected phase. If conditioned by a reverse consumer voltage that is greater than the set threshold, without an error message. Good news: the relay is energized (contacts 11-14 and 21-24) closed, the LED is off.