ABB AC500 V3 Hardware Manual page 919

Fig. 173: Assembly: wrong
Fig. 174: Assembly: correct
Make a connection between the DIN rails and PE (Protective Earth). For this, use an grounding
wire with a minimum conductor cross section of 10 mm².
The wire is connected to the DIN rail with an M6 screw.
A large-area contact of the DIN rail with the metallic mounting plate improves the EMC behavior
significantly, as the disturbances can be discharged more effective.
2.4.4.2 Cable routing
● Route cables meeting the standards.
● Sort the cables into cable groups:
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2022/01/31
Overall information (valid for complete AC500 product family) > EMC-conforming assembly and construction
There are three important principles to be especially considered:
– Keep all connections as short as possible (in particular the grounding con-
ductors)
– Use large conductor cross sections (in particular for the grounding conduc-
tors)
– Create low-impedance, i.e. good and large-sized contacts (in particular for
the grounding conductors)
Pay attention to the following:
– Use vibration-resistant connections
– Clean metallic contact areas
– Use solid plug and screw-type connections
– Use earth cable shields with clips on a well-grounded metallic surface
– Do not use aluminium parts
– Do not use sheath wires
– Do not use toothed lock washers under screw connections
Power current cables
Power supply cables
Signal cables
Data cables
3ADR010278, 3, en_US
System assembly, construction and connection
919