Siemens SINAMICS S220

More information
You can 󹪝nd more information about cable cross-sections on the Internet:
SINAMICS S220 Booksize dimensioning the protective conductor (
https://
support.industry.siemens.com/cs/ww/en/view/109804135)
4.15.3.2 Protective connection via the mounting plate
Overview
As an alternative to the protective connection via the protective conductor busbar, power units
can also be connected to the protective conductor connection of the control cabinet through the
conductive mounting plate in the control cabinet.
Description
All of the following conditions must be satis󹪝ed when connecting the protective conductor
connection of the control cabinet via the mounting plate:
• Use a bare metal mounting plate that is resistant to corrosion, e.g. sendzimir coated with a
minimum thickness of 2mm.
• Carefully ensure that the electrically conductive connection between the mounting plate and
the control cabinet corresponding to the speci󹪝cations of the control cabinet manufacturer.
• All component 󹪝xing screws must be screwed-in with spring lock washer and washer and
then tightened with the speci󹪝ed tightening torque. Equivalent screw connections are
permissible.
• At least one 󹪝xing screw of the component is marked as protective conductor connection
using the following symbol according to IEC60417–5019:
• The continuity of the protective conductor connection must be checked, e.g. according to
IEC60204-1Chapter 18.2.2or IEC60364-6Chapter 6.4.3.2.
• Just like all power connections, the 󹪝xing screws of the components are regularly re-
tightened with the speci󹪝ed tightening torques.
The marked protective conductor connections of the devices are then not assigned.
4.15.4 Functional equipotential bonding
Overview
This section provides information on installing the function equipotential bonding for a drive
line-up.
Application planning
4.15Protective connection and function equipotential bonding
Booksize power units
72 Equipment Manual, 09/2023, A5E53307519B AA