Siemens SINAMICS S120 Manual page 373

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Figure 10-6
AC Drive
Manual, (GH6), 07/2016, 6SL3097-4AL00-0BP5
Within a machine/system, ensure that the protective conductor for the line feeder cable fulfills
at least one of the following conditions:
For fixed connection:
The protective conductor is routed so that along its complete length it is protected against
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mechanical damage.
1)
As a conductor of a multi-conductor cable, the protective conductor has a cross-section ≥
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2.5 mm Cu.
2
For an individual conductor, the protective conductor has a cross-section ≥ 10 mm²
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The protective conductor consists of two conductors with the same cross-section.
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When establishing the connection using an industrial plug connector according to EN 60309:
As a conductor of a multi-conductor cable, the protective conductor has a cross-section
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≥ 2.5 mm Cu.
2
Cables routed within control cabinets or closed machine housings are considered to be
1)
adequately protected against mechanical damage.
The cable cross-sections must be dimensioned in compliance with local installation rules for
the rated current of the Power Module.
Minimum cross section 6 mm
6 mm can this connection be appropriately reduced.
2
Same cross-section as the line conductor.
Protection connection concept for Power Modules blocksize format
Cabinet design and EMC for components, Blocksize format
10.7 Protective connection and equipotential bonding
Cu. Only if the cross-section of the conductors is
2
Cu.
2
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less than
373