Siemens SINAMICS DCM Manual page 104

6.1.3 Arranging components for converter units
①
The line reactor in the field circuit is dimensioned for the rated current of the motor field.
②
The line reactor in the armature circuit is dimensioned for the rated motor current in the armature.
The line current equals 0.82 times the DC current.
③
The RFI suppression filter for the armature circuit is dimensioned for the rated motor current in the armature.
The line current equals 0.82 times the DC current.
④
The RFI suppression filter for the field circuit is dimensioned for the motor field's rated current.
⑤
If the supply voltages for the armature circuit and field circuit are the same, the voltage for the field can also be
taken after the radio interference suppression filter for the armature circuit. In this case, the line reactor must be
dimensioned for the sum of the rated armature current and the rated field current times 0.82. The field circuit must
be protected separately.
<6> Devices with "Power interface with AC electronic power supply"
<7> Devices with "Power interface with DC electronic power supply"
Figure 6-9 Arrangement of reactors and RFI suppression filters
NOTICE
Whenever RFI suppression filters are used, line reactors are required between the filter and
device input for the purpose of decoupling the TSE circuit and providing protection for the X
capacitors.
The components must be wired in the following order:
Line supply – radio interference suppression filter – commutating reactor – SINAMICS
DCM.
An incorrect arrangement can destroy a thyristor (short-circuit) and rupture a fuse.
SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001
6.1 Instructions for EMC-compliant drive installation
ac.maher.co.ir
Connecting
105