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Application planning
4.15 Protective connection and function equipotential bonding
4.15.2
Conductor cross-section for protective connections
Technical data
Select the conductor cross-section of the protective conductor corresponding to the table below.
The values are applicable if the protective conductor is manufactured out of the same metal
as the line conductors. If this is not the case, then the protective conductor cross-section
must be selected in such a way that an electrical conductivity is obtained that is at least the
same as the data listed in this table.
Table 4-20
Cross-section of the line supply cable [mm
Up to 16 mm
From 16 mm
From 35 mm
4.15.3
Protective connection concept
4.15.3.1
Protective connection via the PE busbar
Overview
Power units are connected with a protective conductor to the central PE busbar in the control
cabinet.
70
Conductor cross-section for copper protective connections
2
to 35 mm
2
2
2
] Cable cross-section of the copper protective con‐
2
nection [mm
2
]
The same as the line supply cable
16 mm
2
0.5 x line supply cable
Equipment Manual, 09/2023, A5E53307519B AA
Booksize power units
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