Semiconductor soft starter 3RW3 8.2 Description of the unit The SIRIUS 3RW3 soft starters are part of the SIRIUS 3R modular system. They are compatible with the other SIRIUS 3R switching devices. Possible combinations consist of: Soft starter 3RW3 + circuit-breaker 3RV Soft starter 3RW3 + overload relay 3RU/3RB + contactor 3RT. The connecting modules that are used for contactor/circuit-breaker combi- nations are used for this purpose (see Chapter 8.3.2 "Assembly guidelines"). Fig. 8-1: Soft starter 3RW3 Sizes 3RW30/31 The soft starter 3RW30 is available in the four sizes S00, S0, S2 and S3.
The soft starter 3RW31 is available in the S0 size The following table contains the power ranges of the individual sizes (all data applies to UN = 400 V and 40° C ambient temperature): Size S00 Size S3 1.1 - 4 kW 30 - 55 kW 6 - 9 A 63 - 100 A (W x H x D) (mm) 45 x 97.5 x 93 (W x H x D) (mm) 70 x 170 x 178 Tabelle 8-2: 3RW3, sizes Rev. 08/99 8-5 Size S0 Size S2 5.5 - 11 kW 15 - 22 kW 12.5 - 25 A 32 - 45 A x H x D) (mm) 45 x 125 x 119 (W x H x D) (mm) 55 x 160 x 143