Lenze 8400 - Manual (Page 171)

Electrical installation
Installation according to EMC (installation of a CE-typical drive system)
Installation in the control cabinet
6
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171 EDS84ASC552 EN 9.1
6.2.5 Installation in the control cabinet
Mounting plate requirements
ƒ Only use mounting plates with conductive surfaces (zinc-coated or V2A-steel).
ƒ Painted mounting plates are not suitable even if the paint is removed from the
contact surfaces.
ƒ If several mounting plates are used, ensure a large-surface connection between the
mounting plates (e.g. by using earthing strips).
Mounting of the components
ƒ Connect the controller and RFI filter to the grounded mounting plate with a surface
as large as possible.
ƒ No DIN rail mounting!
Optimum cable routing
ƒ The motor cable is optimally installed if
– it is separated from mains cables and control cables,
– it crosses mains cables and control cables at right angles.
ƒ Always install cables close to the mounting plate (reference potential), as freely
suspended cables act like aerials.
ƒ Lead the cables to the terminals in a straight line (avoid tangles of cables).
ƒ Use separated cable channels for motor cables and control cables. Do not mix up
different cable types in one cable channel.
ƒ Minimise coupling capacities and coupling inductances by avoiding unnecessary
cable lengths and reserve loops.
ƒ
Short-circuit unused cores to the reference potential.
ƒ Install the positive and negative wires for DC 24 V close to each other over the entire
length to avoid loops.
Earth connections
ƒ Connect all components (drive controllers, chokes, filters) to a central earthing point
(PE rail).
ƒ Set up a star-shape earthing system.
ƒ Comply with the corresponding minimum cable cross-sections.