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Control cabinet design and EMC booksize
8.11 Protective connection and equipotential bonding
8.11
Protective connection and equipotential bonding
The components are designed for use in control cabinets with a protective conductor
connection.
Conductor cross-section for protective connections
The protective conductor connection of the components must be connected to the protective
conductor connection of the control cabinet as follows:
Table 8-19
Line supply cable in mm
Up to 16 mm
From 16 mm
From 35 mm
The values listed in the table are applicable for protective conductors manufactured out of the
same metal as the line conductors. If this is not the case, then you must calculate the protective
conductor cross-section in such a way that a conductivity is obtained that is at least equivalent
to the specifications listed in this table.
More information is provided in Chapter "Protective connection and equipotential bonding" of
the SINAMICS S120 Equipment Manual Booksize Power Units
support.industry.siemens.com/cs/ww/en/view/109781351).
You must dimension cable cross-sections in compliance with local installation regulations.
More information is provided in the Product Information "Dimensioning the protective
conductors for SINAMICS S220 Booksize
109804135)".
Protective connection concept SINAMICS S booksize power units
Power units must always be connected with a protective conductor connected to the central PE
busbar or the conductive mounting plate in the control cabinet.
More information is provided in Chapter "Protective connection and equipotential bonding" of
the SINAMICS S120 Equipment Manual Booksize Power Units
support.industry.siemens.com/cs/ww/en/view/109781351).
Functional equipotential bonding
You must arrange the drive lineup on a common, bare metal mounting plate in order to comply
with EMC limit values. You must connect the mounting plate to the protective conductor
connection of the control cabinet through a low impedance connection.
More information on the functional equipotential bonding surface, functional equipotential
bonding conductor and mounting components on DIN rails is provided in Chapter "Protective
connection and equipotential bonding" of the SINAMICS S120 Equipment Manual Booksize
Power Units (https://support.industry.siemens.com/cs/ww/en/view/109781351).
138
Conductor cross-section for copper protective connections
2
2
to 35 mm
2
2
2
Copper protective connection in mm
The same as the line supply cable
16 mm
2
0.5 x line supply cable
(https://
(https://support.industry.siemens.com/cs/ww/en/view/
(https://
Equipment Manual, 01/2022, 6SL3097-6AC30-0BP0
2
Booksize power units
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