Semiconductor soft starter 3RW3 Fan installation 1 2 Fig. 8-21: Accessories: fan installation Terminal covers For sizes S2 and S3, the terminal covers of the contactors 3RT1 belonging to the same size can be used for additional finger protection. Installation of the soft starters corresponds to installation on the contactors. Connection modules For the creation of fuseless feeders (soft starter + circuit-breaker 3RV), the same connection modules are available as are also used for the combina- tions 3RT + circuit-breaker 3RV. Also observe the notes and allocation tables in Chapter 8.3.2 entitled "Assembly specifications".
RC element If the soft starter 3RW30/31 is to be cycled from a PLC by triac or thyristor output, incorrect response can be avoided with an RC element. If there is s leakage current of more than 1 mA, and if no RC element is used, the soft starter may interpret the voltage drop at the input as an "ON" command. RC element connection example Auxiliary voltage PLC control contact RC element A2 A1 IN1 3RW30/31... Fig. 8-22: Connection example with RC element 8-34 Stand 08/99