Engineering Guide CDA3000
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6 Selection of supplementary components
6.1 Line choke ...............................................................6-2
6.1.1 Effect of the line choke ........................................6-2
6.1.2 Operation with reactive current compensation
system .................................................................6-4
6.1.3 Technical data of line chokes LR3x.xxx ................6-6
6.1.4 Assignment of line choke to inverter module ........6-7
6.2 Motor choke ............................................................6-8
6.2.1 Technical data of the motor chokes .....................6-8
6.2.2 Assignment to the inverter modules ...................6-10
6.3 Braking resistors ...................................................6-12
6.3.1 Technical data of series BRxxx, xx-xx ................6-12
6.3.2 Assignment to inverter modules CDA3000 .........6-13
6.4 Radio interference suppression filter ...................6-14
6.4.1 Technical data of RFI filters EMC34.xxx ..............6-14
6.4.2 Permissible motor cable length with internal
RFI filter .............................................................6-15
6.4.3 Permissible motor cable length with internal
and external RFI filter .........................................6-16
6.4.4 Permissible motor cable length with external
RFI filter .............................................................6-16
7 System installation
7.1 Heat discharge from the switch cabinet ................7-2
7.1.1 Basic terms for calculation ...................................7-2
7.1.2 Effective switch cabinet surface ...........................7-3
7.1.3 Calculation of filter fans .......................................7-4
7.1.4 Calculation of heat exchangers ............................7-5
7.2 Heat transfer by heat conductance ........................7-7
A Formula bank
A.1 Mathematical symbols ........................................... A-2
A.1.1 SI units ................................................................A-2
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