Siemens SIRIUS 3RA6 System Manual page 34

Application planning
4.3 Supply options (main circuit)
Only size S0 3RV1.2 circuit breakers must be mounted on the 45-mm adapter for the infeed
system for 3RA6. Interphase barriers must be mounted. If the short-circuit current at the
installation point exceeds the circuit breaker's specified rated service short-circuit breaking
capacity, you will need to use a backup fuse.
Short-circuit hazard!
The cables shall be arranged in such a manner that an internal short-circuit is not to be
expected. They shall be rated at least in accordance with the information concerning the
short-circuit
withstand strength (IEC 61439-1 Section 8.6.1) and designed to withstand at least the
short-circuit stresses limited by the protective device on the supply side of the infeed
system.
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WARNING
SIRIUS 3RA6 compact starter
System Manual, 09/2014, NEB560060102000/RS-AA/006