3RW3 semiconductor motor control unit
SIRIUS System Manual
GWA 4NEB 430 0999-02b
8-5
8.2 Device description
The SIRIUS 3RW3 soft starters are part of the SIRIUS modular system. They
are compatible with the other SIRIUS switching devices.
The possible combinations are:
• 3RW3 soft starter + 3RV circuit breaker
• 3RW3 soft starter + 3RU/3RB overload relay + 3RT contactor
The link modules used for combinations of contactors and circuit breakers
are used for this (see Section 8.3.2, "Installation guidelines").
Figure 8-1: 3RW3 soft starter
3RW30/31 frame sizes
The 3RW30 soft starter is available in four frame sizes: S00, S0, S2, and S3.
The 3RW31 soft starter is available in frame size S0.
The following table contains the power ranges of the various frame sizes (all
specifications apply to U
N
= 400 V and 40° C ambient temperature):
Table 8-2: 3RW3, frame sizes
Frame size S00 Frame size S0 Frame size S2 Frame size S3
1.1 - 4 kW 5.5 - 11 kW 15 - 22 kW 30 - 55 kW
6 - 9 A 12.5 - 25 A 32 - 45 A 63 - 100 A
(W x H x D) (mm)
45 x 97.5 x 93
(W x H x D) (mm)
45x125x119
(W x H x D) (mm)
55 x 160 x 143
(W x H x D) (mm)
70x170x178
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