BU1DC2 DC Voltage Relay (BU1DC224)

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Product number: BU1DC224


The relay BU1DC of the BASIC LINE is equipped with an over- (U>) and undervoltage supervision (U<) with separate adjustable pick-up values and common trip delay (t) and hysteresis (DIFF).

The BU1DC is designed to be fastened onto a DIN-rail acc. to DIN EN 50022. (This is the case for all relays of the BASIC LINE.)


ParameterSetting Range

0.7 … 1.1 Un


1.0 … 1.4 Un


0 … 100 s


2%, 4%, 6%, 8%, 10%

  • Self-powered – No aux. Voltage needed

  • Easy DIN rail mounting

  • Sealable plastic covers

  • Very easy settings via buttons at the front

  • Fault indication via LED and output relays

  • Operational from −25°C to 70°C

  • Overvoltage and undervoltage supervision

  • Settable hysteresis (2%, 4%, 6%, 8%, 10%)

  • AC and DC Voltage based supervision devices.

  • The Basic Line devices are self-powered – Measuring voltage also supplies the device.

  • The Basic Line scope covers voltage and frequency limits as well as ROCOF and vector surge.

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