BU1AC Voltage Relay (BU1AC110)

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Product number: BU1AC110

Configuration

The relay BU1AC 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 BU1AC 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.)

 
Connection Diagram “A” (2-wire system)

 
Connection Diagram “B” (3-wire system)

 
Connection Diagram “C” (4-wire system)

SystemRelay TypeConnection Diagram
3-phase 110 VBU1AC 110B
3-phase 400 VBU1AC 400B
3-phase 400/230 V with NBU1AC 230C (or A for single-phase measuring)
3-phase 690/400 V with NBU1AC 400A (only single-phase measuring possible)

Settings

ParameterRange
U<

70% … 110% Un

U>

90% … 130% Un

t

0 … 10 s

DIFF

2% … 10%

fn

45 … 66 Hz

  • 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

  • Under-/Overvoltage supervision (one or three phase)

  • Separate settings for V< and V>

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

  • Two output relays

  • 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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