SIEMENS
SINAMICS DCM
Introduction
The system components of a DC drive
1/14
Siemens D 23.1 · 2014
1
■
Configuration
For the specific arrangement
of the components, see
"Notes for EMC-
compliant drive installation"
Semiconductor fuses and
commutating reactor for the field circuit
Fuses, circuit-breaker, contactors for the DC
Converter fan
Fuses, circuit-breaker, contactors for the
electronics power supply
Fuses, circuit-breaker, contactors for the DC
motor fan
Control transformer, if required, with fuses,
circuit-breaker
Radio interference suppression filter for the field
circuit and electronics power supply
Application-specific components
Additional components to be selected
depending on the requirements
Dimension the motor cable and
tachometer cable
Line
connection
Observe the max. permissible short-
circuit current, when required, use fuses
or
short-circuit current limiting
circuit-breakers
For four-quadrant operation and
rated DC current ≤ 850 A, use
semiconductor fuses in the
DC motor circuit
Motor connection
Line connection
Contactor and main switch - Page 4/22
Circuit-breaker - Page 4/22
Radio interference suppression filter -
Page 4/23
Commutating reactor - Page 4/18
Contactor or
circuit-breaker?
Semiconductor
fuses in the
DC Converter?
Yes
Yes
Yes
Yes
No
No
No
No
Radio interference
suppression filter?
Converter transformer
Additional loads connected
to this converter
transformer?
Rated input voltage =
Line voltage?
Use semiconductor fuses
- Page 4/14
Motor
connection
© Siemens AG 2014