The value in the reference for the capacitance per unit length is specified in relation to ground.
During commutation, the capacitances subsequently switch in series via ground, and
capacitances switched in series produce a total capacitance of 1/2 (factor 0.5). C’ refers to the
operating cable capacitance.
Effective cable inductance in the case of commutation:
L = L’ (in mH/km) * cable length / number of parallel cables
The value in the reference for the conductor inductance refers to one phase. L’ refers to the
inductance per unit length of a conductor in a single-phase alternating current system. The
inductance per unit length can be calculated with the assumption that one conductor is used as
the forward line and the other is used as the return line.
You can connect the following maximum number of cables:
• Six parallel cables per phase with 630 mm
2
at one water-cooled converter
• Four parallel cables per phase with 240 mm
2
at one air-cooled converter
Signal cables and other cables
Complete, pre-assembled cable sets are supplied as standard for cabling the power unit, static
excitation equipment, and closed-loop control. The cable-related cabinet distances can be
specified for the project.
Shield support
Observe the notes in Chapter "Connecting the power unit (Page 91)".
Reference
Heinold, Lothar (publ.): Kabel und Leitungen für Starkstrom I. Publicis Corporate Publishing
1987
4.2
Requirements when mounting and installing the device
4.2.1
Requirements for installation location
The cabinet units are suitable for installation in general operating areas (to
DIN EN 60146-1-1 / VDE 558 T11 and DIN EN 50178 / VDE 0160 (IEC 62103), degree of
contamination 2; without conducted contamination). For this reason, SINAMICS devices must
be protected in such a way that they cannot be touched directly when they are being installed
in general operating areas.
The operating areas must be dry and free of dust. The air supplied must not contain any
electrically conductive gas, vapors, or dust which could impair operation.
For information about permissible ambient and installation conditions, see the "Technical data
and drawings" section.
Preparations for use
4.2 Requirements when mounting and installing the device
3rd Party LCI Control Upgrade
Operating Instructions, 02/2022, A5E31872818
65
