Siemens SIROTEC User Manual

Cabinet design and EMC Booksize
12.9 Protective connection and equipotential bonding
Booksize Power Units
736 Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
12.9
Protective connection and equipotential bonding
Protective connections
The SINAMICS S Booksize drive system is 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 12- 31 Conductor cross-section for copper protective connections
Line supply cable in mm
2
Copper protective connection in mm
2
Up to 16 mm
2
The same as the line supply cable
From 16 mm
2
to 35 mm
2
16 mm
2
From 35 mm
2
0.5 x line supply cable
The values listed in this table 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 determined so that a level of conductivity is obtained that is as a
minimum, the same as the data listed in this table.
All system components and machine parts must be incorporated in the protection concept.
The protective connection (PE connection) for the motors used must be established through
the motor cable.
Copper cables with appropriate cross-sections (> 2.5 mm²) must be used for the ground
connection of PROFIBUS nodes.
Additional information about ground connection for PROFIBUS can be found at:
http://www.profibus.com/fileadmin/media/wbt/WBT_Assembly_V10_Dec06/index.html
WARNING
Danger to life caused by high leakage currents when the protective conductor in the line
feeder cable is interrupted
The drive components conduct a high leakage current via the protective conductor.
Touching conductive parts when the protective conductor is interrupted can result in death
or serious injury.
• Carefully comply with the applicable regulations for dimensioning the protective
conductor (see below).
Protective connection concept, SINAMICS S120 booksize power units
Booksize power units should always be connected with a protective conductor to the central
PE busbar or the conductive mounting plate in the control cabinet (see the following
diagram).
Note
Ensure that for increased leakage currents, the local regulations for protective conductors at
the installation site are complied with.

Siemens SIROTEC Specifications

General

Brand	Siemens
Model	SIROTEC
Category	DC Drives
Language	English