Typical circuit diagrams
10.1 Connection examples for main and control circuits
3RW44 soft starters
Manual, 03/2017, NEB535219502000/RS-AB/008
223
3RW44 in a standard circuit and control like a contactor
1)
For permissible main and control voltage values, refer to chapter Technical data of the
power unit (Page 259).
Note
With this circuit type, motor starting may be delayed by up to 5
s after the start command,
nternal run times of the soft starter. Coasting down is the only possible coasting
Note
After the control supply voltage has been switched off 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 recom
mended 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.
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