Cabinet design and EMC for components, Blocksize format
10.6 Protective connection and equipotential bonding
SINAMICS S110
Manual, 07/2015, 6SL3097-4AC10-0BP5
237
Danger to life through a hazardous voltage when connecting an unsuitable power supply
Touching live components can result in death or severe injury.
• Connect the ground potential to the PE conductor connection.
• Mount the power supply close to the drive lineup.
Ideally, they should be mounted on a common mounting plate. If different mounting
plates are used, their electrical interconnection must comply with the EMC installation
Protective connection and equipotential bonding
Protective connections
The SINAMICS S drive system is designed for use in cabinets with a PE conductor
connection.
The PE conductor connection of the SINAMICS components must be connected to the PE
conductor connection of the control cabinet as follows:
Table 10- 6 Conductor cross section for copper PE connections
Copper PE connection in mm
2
2
The same as the line supply cable
2
2
2
2
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 (PE connection) of the motors used must be established through
the motor cable. For EMC reasons, the shield of the motor cable should be connected
through a large surface area both at the Power Module as well as at the motor.
The drive line-up must be arranged on a common metallic bright mounting plate in order to
comply with the EMC limit values. The mounting plate must be connected to the PE
conductor connection of the 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/start.html
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