8 Semiconductor soft starter 3RW3 (Sanftstarter) Stand 08/99 Section Topic Page 8.1 Regulations/specifications/approvals 8-3 8.2 Description of the unit 8-5 8.2.1 Physical principles 8-6 8.2.2 General description 8-10 8.2.3 Comparison: soft starter 3RW3 with the soft starter- SIKOSTART 3RW22 8-13 8.2.4 Comparison: soft starter 3RW3 with star-delta combi- nation 3RA 8-15 8.2.5 Configuration notes 8-15 8.3 Application and use 8-17 8.3.1 Application areas and selection criteria 8-17 8.3.2 Assembly specifications 8-17 8.3.3 Overview tables:
compensation factors 8-20 8.3.3.1 Soft starter 3RW30/31, stand-alone 8-20 8.3.3.2 Soft starters 3RW30/31 in combination with circuit- breakers 3RV1 8-21 8.3.3.3 Combining the contactor 3RT with the thermal over- load relay 3RU1 and the soft starter 3RW3 8-23 8.3.3.4 Combining the contactor 3RT with the electronic overload relay 3RB10 and the soft starter 3RW3 8-25 8.3.4 Example circuits 8-28 8.3.5 Commissioning 8-29 8.3.6 Operating messages and fault diagnostics 8-31 8.3.7 Timing diagram 8-32 8.4 Accesories 8-33 8.5 Assembly and connection 8-35