Features and advantages of UNIVERSAL CURRENT SENSITIVE RCCBs B type and B+ type asti APPLICATION ■ Fault protection (protection against indirect contact of live parts) ■ Additional protection (protection in case of direct contact of live parts, IAn<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, IAn=30mA, 100mA, 300mA 4p B+ In = 25A, 40A, 63A, IAn=30mA, 100mA, 300mA according to breaking times: 4p B, B+ instantaneous, short time delayed (G/KV), selective (S) basic standard for RCCB's AC and A type additional requirements for type B VDE standard for B+ requirements ( 20kHz) according to the number of poles: ^ 2p Standards IEC/EN 61008-1 IEC/EN 62423 VDE 0664-400 B+ 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.

Residual current circuit breakers Rated residual current Rated current Type 34 Technical data on page 63

a - contact = make contact (NO) b - contact = break contact (NC) Shunt trip release DA EFI Technical data on page 63, 66 35