Modular | digital | voltage monitoring | protection relay | 230V | 230-280V | 150-210V | DIN

The device allows the high-voltage threshold to be set from 230V to 280V, the low-voltage threshold from 150V to 210V, and the trip delay from 0.1 to 10 seconds. When the mains voltage moves outside the set limits, the relay disconnects the output after the configured delay time. Once the voltage returns to the safe range, the system automatically restores relay operation.

If the mains voltage exceeds the set U> value, the U> LED indicator lights up. The device waits for the configured „t“ delay time and then switches off the relay and the „OUT“ indicator. When the voltage drops at least 5V below the set U> threshold, the reset delay countdown begins. After the delay has elapsed, the U> indicator turns off, the relay is activated, and the „OUT“ indicator turns on again.

If the mains voltage drops below the set U< value, the U< LED indicator lights up. The device waits for the configured „t“ delay time and then switches off the relay and the „OUT“ indicator. When the mains voltage rises at least 5V above the set U< threshold, the reset delay countdown begins. After the delay has elapsed, the U< indicator turns off, the relay is activated, and the „OUT“ indicator turns on.

• Adjustable overvoltage protection from 230V to 280V.
• Adjustable undervoltage protection from 150V to 210V.
• Adjustable trip and reset delay time from 0.1 to 10 seconds.
• Automatic relay reset when the mains voltage returns to the normal range.
• Clear 3-digit LED display showing the actual mains voltage and configured parameters.
• Separate LED indicators for high voltage, low voltage, and output status.
• Compact 36mm-wide housing suitable for installation in control and distribution panels.

• For single-phase networks only: the device is designed for voltage monitoring of 230V AC L-N single-phase circuits.
• Limited relay contact load: the output contact is rated for up to 5A / 250V AC resistive load, so an additional contactor must be used to control higher loads.
• Not suitable for humid environments: the device must not be used in damp locations or environments where it may be exposed to moisture.
• Fixed 5V reset hysteresis: the automatic reset threshold is 5V away from the set protection threshold.

A device operating in a single-phase electrical circuit needs protection against unstable mains voltage. This digital voltage control relay is installed in the control panel. For example, the U> threshold is set to 260V, the U< threshold to 180V, and the delay time to 2 seconds. As long as the mains voltage remains between 180V and 260V, the relay output remains active. If the voltage rises above 260V or drops below 180V for longer than the configured delay time, the relay disconnects the load control circuit. When the voltage returns to the safe range and reaches the specified 5V reset difference, the relay automatically restores operation after the delay time.

The relay is designed for a 230V AC single-phase network. The operating voltage measurement range is from 140V to 290V AC between L and N.

Yes. The U> overvoltage protection threshold can be set from 230V to 280V.

Yes. The U< undervoltage protection threshold can be set from 150V to 210V.

Yes, the delay time can be adjusted from 0.1 to 10 seconds.

Yes. When the voltage returns to the configured safe range and moves 5V away from the protection threshold, the device automatically activates the relay output after the configured delay time.

The relay output contact is rated for up to 5A / 250V AC resistive load. For higher loads, it is recommended to use the relay output to control a contactor or another suitable power switching device.

Use the device according to its intended purpose and installation instructions. Do not use it in a humid environment. Provide a separate switch and circuit breaker in the installation circuit. They must be installed close to the device, in a location easily accessible to the operator, and marked as the means for disconnecting the device.

Before performing maintenance or cleaning, switch off the power supply to the device and disconnect it from the electrical circuit. Clean the housing with a soft dry or slightly damp cloth. Do not use conductive materials or chemical cleaners that could damage the housing or electronic components. After cleaning, make sure that the device operates correctly.