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7.4
Potential equalization
Protective connections for a central components (AM600)
The SINAMICS S Booksize drive system and the Adapter Module 600 (AM600) are designed
for use in cabinets with a PE conductor connection.
The protective conductor connection of the SINAMICS components must be connected to
the protective conductor connection of the control cabinet as follows:
Table 7- 10
Line supply cable in mm
Up to 16 mm
From 16 mm
From 35 mm
For materials other than copper, the cross-section should be increased so that as a
minimum, the same conductivity is attained.
All system components and machine parts must be incorporated in the protection concept.
The drive line-up must be arranged on a common bare metal mounting plate in order to
comply with the EMC limit values. The mounting plate must be connected to the protective
conductor connection of the control cabinet through a low impedance.
Protective equalization for a central components (AM600)
A mounting plate serves simultaneously as potential equalization surface. This means that
no additional equipotential equalization is required within the drive line-up.
If a common bare metal mounting plate is not available, then equally good potential
equalization must be established using cable cross-sections as listed in the table above or,
as a minimum, with the same conductivity.
Protective connections/potential equalization for distributed components
● The distributed components are designed for use with a connected protective conductor.
● All system components and machine parts must be incorporated in the protection
concept.
● Ensure that the following protective conductor connection paths are available:
– Via the Hybrid Cable.
– Via the PE connection. In this case, the protective conductor cross-section must be
Each of these connections must be suitable as a protective connection.
SINAMICS S120M Distributed Drive Technology
Manual, (GH12), 12/2014, 6SL3097-4AW00-0BP3
Conductor cross-section for copper protective connections
2
2
to 35 mm
2
2
2
≥4 mm
.
2
Cabinet design and EMC S120M
7.4 Potential equalization
Copper protective connection in mm
The same as the line supply cable
16 mm
2
0.5 • line supply cable
2
139
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