Siemens SINAMICS S120 System Manual page 181

The protective conductor connection of the SINAMICS components must be connected to the
protective conductor connection of the control cabinet as follows:
Table 12-9
Line feeder cable to Line Module [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 protective connection for the motors used must be established through the motor cable. For
EMC reasons, these protective connections should be made at the HF Choke Module.
In order to maintain the EMC limit values, the drive line-up must be arranged on the mounting
plate as specified in Chapter Installation (Page 61) . The mounting plate must be connected to
the protective conductor connection of the control cabinet through a low impedance.
Copper cables with appropriate cross-sections (>2.5 mm²) must be used for the ground
connection of PROFIBUS nodes.
For more information about grounding PROFIBUS, see: http://www.profibus.com/fileadmin/
media/wbt/WBT_Assembly_V10_Dec06/index.html
Electric shock and fire when operating outside closed electrical equipment rooms and/or
control cabinets
Death or serious injury can result if you do not take suitable measures when installing the
equipment to provide touch protection for live components or the propagation of a fire.
• Only operate the components in electrical equipment rooms or control cabinets that can be
High Frequency Drive
System Manual, 10/2020, 6SL3097-5AH10-0BP0
Conductor cross-sections for copper protective connections
2
2 to 35 mm 2
2
WARNING
securely locked.
12.5 Protective connections and equipotential bonding
] Protective connection, copper [mm
2
The same as the line supply cable
16 mm 2
0.5 x line supply cable
Cabinet design and EMC
]
2
179