Lenze 4800 Manual page 70

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Installation
4-32
48XX/49XXSHB0399
Grounding
( Ensure a good equipotential bonding of all system parts (controller, RFI filter,
mains choke, etc.) by cables to a central earthing bus (PE busbar). The
prescribed minimum cross-sections must be observed in all cases.
( To comply with the EMC Directive, not the cross-section but the contact
surface is decisive.
( Ensure that grounding of the control electronics does not cause any
damage to external controllers.