Semiconductor soft starter 3RW3 8.3.3.2 Soft starters 3RW30/31 in combination with circuit-breakers 3RV1 Connection module 3 k M Fig. 8-12: 3RW, stand-alone The chosen size of the circuit-breaker should be so large that the calculated current value can still just be set. The next smallest circuit-breaker must be used if current values are lower than can be set with the specified circuit-breaker. Circuit-breaker dimen- sioning Rev. 08/99 8-21 3RV 3RW