Residual current circuit breaker Type B - NFI4BK

Residual current circuit breaker Type B - NFI4BK

Product rating: 4.82/5 (11x)

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RESIDUAL CURRENT CIRCUIT BREAKERS TYPE B - NFI4BK

Product options

  • £175,12 incl. VAT

    £144,73

    £199 incl. VAT Discount 12%

  • £189,20 incl. VAT

    £156,36

    £215 incl. VAT Discount 12%

  • £207,68 incl. VAT

    £171,64

    £236 incl. VAT Discount 12%

£175,12 incl. VAT

£144,73

£199 incl. VAT Discount 12%

Producer: Iskra

Product question

  • ISKRA NFIB are type B residual current circuit breakers (RCCB) for which tripping is ensured as for type A and in addition for smooth d.c. residual currents, residual d.c. currents which may result from rectifying circuits and high frequency a.c. residual currents.
  • Intended for use in applications with frequency inverters, medical devices, UPS, mobile installations, elevators...
  • The type B residual current circuit breakers are not intended for use in d.c. systems and networks with operating frequencies other than 50 or 60 Hz.
  • For type B tripping conditions for frequencies up to 1 kHz are defined.
  • Functions of detection, evaluation and interruption for type A residual currents do not depend on the line voltage. For evaluation of smooth d.c. residual currents supply voltage greater than 50 V is required which can be applied to any two poles only.

Versions:

  • NFIBK: short-time delay tripping
  • Surge currentwithstand capability with current waveform 8/20 µs is 3 kA.
  • When designing and installing electrical installations, electrical loads that can generate d.c. residual currents in the event of fault, must be assigned a separate electrical circuit.
  • Optional operating position
  • Degree of protection IP20; after installation in a distribution box IP40
  • Assembly to a 35 mm wide mounting rail in accordance with EN 60715

 

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