NORDAC PRO – Migration guideline SK 5xxE to SK 5xxP
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2.9.3 Chokes
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2.9.3.1
Mains chokes
The mains chokes are located upstream from the frequency inverters and limit the input current to
approximately the level of the NORDAC
PRO
output current.
In the following tables, the different mains chokes are assigned to the individual power ranges of both
device series and compared to them.
SK CI1-xxx/xxx-C for SK 5xxE
SK CI5-xxx/xxx-C for SK 5xxP
Illustration 12: NORDAC PRO mains chokes
To reduce dangerous mains current peaks or mains voltage fluctuations, adaptive mains chokes may
be used depending on the system. Mains feedback and the proportion of current harmonics will be
considerably reduced.
SK CI1-… mains chokes are specified for a maximum supply voltage of 230 V or 480 V at 50/60 Hz.
SK CI5-… mains chokes are specified for a maximum supply voltage of 230 V or 500 V at 50/60 Hz.
Both types of mains chokes are UL certified and should always be installed in the control cabinet due
to their IP00 protection class version. The mains chokes are connected using screw terminals.
Information
For detailed information, please refer to the technical information
Chapter 5.1.2 "Technical
