Universal Residual Current Circuit Breakers B and B+ Type

APPLICATION

- Fault protection (protection against indirect contact of live parts)

- Additional protection (protection in case of direct contact of live parts, IΔn≤30mA)

- Fire Protection (for locations exposed to fire hazard)

Residual current sensitivity UNIVERSAL

AC: pure sinus residual current, 50/60Hz

A: sinus and pulsating direct current, 50/60Hz

B: AC + A + smooth direct current + high frequency (1kHz)

B+: AC + A + smooth direct current + high frequency (20kHz)

Basic types

according to rated values:

4p B In = 25A, 40A, 63A, IΔn=30mA, 100mA, 300mA

4p B+ In = 25A, 40A, 63A, IΔn=30mA, 100mA, 300mA

according to breaking times:

4p B, B+ instantaneous, short time delayed, selective

according to the number of poles:

4p, 2p

Standards

IEC/EN 61008-1 basic standard for RCCBs AC and A type

IEC/EN 62423 additional requirements for type B

VDE 0664-400 B+ VDE standard for B+ requirements ( 20kHz)

Mode of operation

Pure a.c. and pulsating d.c. type residual current sensitivity, A voltage independent

Smooth d.c. current sensitivity: B, B+ voltage dependent

Minimum operating voltage: 50V

Typical applications

Which are vulnerable to smooth d.c. residual currents:

- Frequency converters,

- Photovoltaic systems, a.c side,

- Charging stations for electric vehicles,

- Variable speed machine tools,

- UPS, computer data centres

- Elevator controls,

- Cranes of all kinds

- Electronic equipment on construction sites,

- Test set-ups in laboratories,

- Installation in general where we can expect d.c. smooth direct residual currents, etc.