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3RW3 semiconductor motor control unit
SIRIUS System Manual
GWA 4NEB 430 0999-02b
8-13
Accessories
A fan can be snapped into the soft starter housing of frame sizes S0 to S3
from below. This brings the following benefits:
• Improved range of options for the installation position
• Increase in the switching frequency (see Section 8.3.2, "Installation guide-
lines")
In the case of frame sizes S0 and S2, extended terminal covers can be
mounted on the box covers in order to cover the cable ends and keep them
safe from fingers. These are identical to the extended terminal covers of the
SIRIUS 3RT contactors of the same frame sizes.
In the case of frame size S3, terminal covers are available for lug connection
or bar connection. These, too, are identical to the accessory parts of the cor-
responding SIRIUS contactor size.
See Section 8.4 for details of other accessories.
Mounting
The devices are attached to the 3RV circuit breakers by means of a link mod-
ule and are thus connected mechanically and electrically. This link module is
identical to the one that is used for the corresponding contactor/circuit-
breaker combinations. This installation variant offers all the advantages of a
fuseless load feeder.
Link modules
The following link modules are used to combine 3RW3 soft starters and
3RV1 circuit breakers:
Table 8-3: Link modules
Connection
The 3RW3 electronic soft starters are available with screw-type terminals.
Plus-minus POZIDRIV 2 screws are used.
The SIGUT terminal system is used (captive screws, contacts open on deliv-
ery, etc.).
Frame size
Link module
S00
3RA1911-1A
S0
3RA1921-1A
S2
3RA1931-1A
S3
3RA1941-1A