Lenze 8400 BaseLine Manual - Manual (Page 55)

Electrical installation
Installation according to EMC (installation of a CE-typical drive system)
Installation in the control cabinet
6
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55 EDS84ABD302 EN 4.0
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 perfectly installed if
– it is routed separately of mains cables and control cables,
– it crosses mains cables and control cables only at a right angle,
ƒ Cables must be routed close to the mounting plate (reference potential) as freely
suspended cables act like antennas.
ƒ Cables must be routed in a straight line to the terminals (avoid “tangle of cables”).
ƒ Use separate cable ducts for power cables and control cables. Do not mix up
different cable types in one cable duct.
ƒ Minimise coupling capacitances and inductances caused by unnecessary cable
lengths and reserve loops.
ƒ
Short-circuit unused cores to the reference potential.
ƒ Route the positive and negative cables for DC 24 V close to each other over the total
length to prevent 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.