---
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title: "DUW-C12: Three-phase undervoltage monitoring 3x 230 V AC"
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---

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DUW-C12: Three-phase undervoltage monitoring 3x 230 V AC

Three-phase undervoltage monitor (each phase against neutral) with fixed threshold value, fixed hysteresis, and integrated test key.

It was developed specifically for emergency lighting according to DIN VDE 0108. The device can also be used for single-phase monitoring.

All unoccupied inputs must be connected to the connected phase.

If there is a reverse voltage due to the load, which exceeds the set threshold value, no fault message is displayed. OK message: the relay is activated (contacts 11-14 and 21-24 closed), the LED is off. Error message: the relay is deactivated (contacts 11-14 and 21-24 open), the LED is on. Test button pressed: the relay is deactivated (contacts 11-14 and 21-24 open), the LED turns on.

## Features

- General data Operating voltage 3N 400/230 V, 50 Hz
- Tolerance -30% to +10%
- Consumption 16 VA (1.7 W)
- Recovery time less than 300 ms
- Dropout voltage less than 85%
- Activation delay approx. 100 ms
- Threshold value 195 V AC, fixed
- Hysteresis approx. 5%, fixed
- Output / contacts 2 x changeover contacts (DPDT)
- Output / switching voltage max. 250 V AC
- Mechanical life 3 x 107 switching cycles
- Electrical life 2 x 105 switching cycles
- Display green and red LED
- Dimensions (W x H x D) 35 x 69.3 x 60 mm
- Weight 110 g
- Operating temperature range -5 ° C to 55 ° C
- Storage temperature range -20 ° C to 70 ° C
- Degree of protection for housing / terminal block IP40 / IP20

---

Source: https://shop.marcomweb.it/en/voltage-current-phase/duw-c12-three-phase-undervoltage-monitoring-3x-230-v-ac

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