Siemens SENTRON - Page 28

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The dimensioning of the SIQUENCE universal current-sensitive Type B RCCB‘s
frequency response takes these boundary conditions into account, and represents
a solid compromise between re protection and operational safety. Since the in-
uence of existing capacitive leakage currents on the tripping of the RCCB is clearly
limited, the RCCB can be used in a signicantly larger number of applications.
The use of Type B+ residual current protection devices is recommended if the use
of residual current protection devices with rated residual currents of max. 300 mA
is required in accordance with DIN VDE 0100-482 “Fire protection against special
risks or hazards” in connection with DIN VDE 0100-530. They meet all requirement
of the well-known Type B, but remain below the tripping value of 420 mA at up
to 20 kHz in accordance with product standards DIN VDE 0664-400 (RCCBs) and
DIN VDE 0664-401 (RCBOs) as well as VdS Guideline 3501, thus offering an in-
creased level of preventive re protection.
High-intensity leakage currents can occur briey when capacitors connected to
the PE protective conductor are switched on (e.g. in the case of EMC lters in
conjunction with frequency converters). In order to ensure trouble-free operation
in such cases, the SIQUENCE universal current-sensitive Type B and Type B+ RCCBs
are always super-resistant and feature short-time delayed tripping (Type
K
).
Residual current protective devices