Protective Connections And Equipotential Bonding - Siemens SINAMICS S120 System Manual

Cabinet design and EMC

11.5 Protective connections and equipotential bonding

11.5 Protective connections 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 11- 8
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 (PE connection) of 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 55) . 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
Danger to life as a result of 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
174
Conductor cross-sections for copper protective connections
2
to 35 mm
2 2
2
WARNING
be securely locked.
] Protective connection, copper [mm
2
The same as the line supply cable
16 mm
2
0.5 x line supply cable
System Manual, (SH2), 04/2015, 6SL3097-4AH10-0BP3
]
2
High Frequency Drive