6-8
Engineering Guide CDA3000
6  Selection of supplementary components
6.2 Motor choke
6.2.1 Technical data 
of the motor 
chokes
Function Effect
• Insertion of the motor choke between 
the inverter module and the standard 
three-phase AC motor improves the 
operating conditions and reduces leak-
age currents and faults.
• Reduction of leakage currents
• Reduction of rate of rise of voltage du/
dt at the motor terminals
• Suppression of faults caused by 
switching in the motor cable
• Increase in motor cable length
Characteristic
Motor choke
MR32.xxx
[3x230 V]
Motor choke
MR34.xxx
[3x400/460 V]
Table 6.6 Technical data of the motor chokes
Inverter
module
 Inverter 
rated
power
Line choke with 4% U
K    
Type
Rated 
current
Power
loss
Dimensions
HxWxD
[mm]
CDA34.003
CDA34.004
CDA34.005
CDA34.006
CDA34.008
CDA34.010
Table 6.7 Technical data of line choke with 4% UK  
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