3Rw44 In A Standard Circuit And Control As Per Contactor - Siemens SIRIUS 3RW44 System Manual

9.1.6 3RW44 in a Standard Circuit and Control as per Contactor

Control circuit
Note
With this circuit type, the motor start may be delayed by up to 5 s after the start command is issued due to
the internal run times of the soft starter. Coasting down is the only possible stopping mode.
Notice
After switching off the control supply voltage and before restarting, the device
must be allowed to cool down for at least 30 s, as this influences the
effectiveness of the inherent protection of the soft starter.
This type of circuit is not recommended for higher switching frequencies as the
integrated fan cannot idle after the soft starter has been switched off, thus
reducing the switching frequency specified in the technical data.
1) For permissible main and control voltage values, refer to Technical Data, Pages 10-8 to 10-12.
SIRIUS 3RW44 System Manual
GWA 4NEB 535 2195-02 DS 04
Main circuit
I >> I >>
U
s
ON
OFF
Circuit Examples
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>30 s
t
9-7