BN1 Mains Decoupling Relay (BN1400)

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Product number: BN1400


The relay BN1‑400 of the BASIC LINE is an universal mains decoupling device to monitor the phase-to-neutral voltages and contains the functions required of VDEW and most other utilities for the mains parallel operation of power stations.


ParameterSetting Range
Rated voltage Un

400 V AC

Phase sequence supervision

Wrong phase sequence trips relay, and is indicated by flashing LED.

Undervoltage supervision U<

75 … 100% Un (hysteresis 3%)

Overvoltage supervision U>

100 … 125% Un (hysteresis 3%)

Underfrequency supervision f<

90 … 100% fn (hysteresis 0.25% fn)

Overfrequency supervision f>

100 … 110% fn (hysteresis 0.25% fn)

Vector surge tripping ΔΘ

1 … 20°

Blocking time to prevent wrong vector surge trippings

0.1 … 10 s

  • 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

  • Voltage supervision (highest / lowest of three phases, 3% hysteresis)

  • Frequency supervision (for all three phases, 3% hysteresis)

  • Vector surge supervison (70 ms, 1° … 20°)

  • 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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