Engineering Guide CDA3000
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3 Selection of inverter module
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System conditions for the CDA3000 inverter drive system
For operation of the CDA3000 drive controllers on the various mains
power systems the following conditions must be met.
Power system
Operation with
Inverter CDA3000
Comments
TN and TT
Permitted without restriction
• Pay attention to con-
nection data
• Best system form in
terms of EMC
Operation of several
CDA32.xxx (1x230V) in the
3AC/N/PE system
• Split symmetrically
across the three outer
conductors
• Pay attention to the
loading of the common
zero conductor,
increase the cross-sec-
tion as necessary.
IT with insulated center point
Operation of inverter mod-
ules in this system type is not
permitted.
• Radio interference sup-
pression filters (inter-
nal/external) may be
destroyed in the event
of “ ground fault”.
• In the event of a
“ground fault” the volt-
age load is increased
(to around twice as
much), as a result of
which the creepages
and clearances are not
maintained and so the
system no longer con-
forms to the Low Volt-
age Directive EN50178
(safety-low voltage).
Table 3.14 System conditions
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