Eberle Controls Three-phase voltage monitor

Eberle Controls Three-Phase Voltage Monitor DWUD1

Manufacturer: Eberle Controls
Designation: Three-Phase Voltage Monitor
Type: DWUD1
Electrical connection type: Clamp connection
With removable terminals: no
Single-phase undervoltage possible: no
Three-phase undervoltage possible: yes
Single-phase overvoltage possible: no
Three-phase overvoltage possible: yes
Single-phase window possible: no
Three-phase window possible: no
Includes DC undervoltage function: no
Includes DC overvoltage function: no
Includes DC window function: no
Voltage measurement range 1: 208 to 480 V
Type of voltage in measurement range: AC
Rated control supply voltage Us at AC 50 Hz: 208 to 480 V
Rated control supply voltage Us at AC 60 Hz: 208 to 480 V
Type of voltage for operation: AC
Min. adjustable response delay time: 0.3 s
Max. permissible response delay time: 30 s
Number of contacts as changeover: 1
Width: 17.5 mm
Height: 90 mm
Depth: 63.5 mm

The three-phase voltage monitor supervises overvoltage and undervoltage between the phases. The relay monitors not only its own supply voltage but also the undervoltage and overvoltage (separate settings). An adjustable response time allows for the locking of the output relay during temporary disturbances. If a voltage disturbance occurs, the relay opens after the delay set by the user. In the event of a phase failure, the relay opens immediately, without waiting for the delay. If a fault is detected when the device is turned on, the relay does not engage. Approvals: UL and CSA.