Installation In The Control Cabinet; Edsvf9333V En 3.0-06/2005 - Lenze 9300 vector Series System Manual

5 Wiring the standard device
5.2 Basics for wiring according to EMC
5.2.5

Installation in the control cabinet

5.2.5 Installation in the control cabinet
Mounting plate requirements
Mounting of the components
Optimum cable routing
Connection system of
earthing
5.2-4
ƒ Only use mounting plates with conductive surfaces (zinc-coated or
V2A-steel).
ƒ Lacquered mounting plates are not suitable even if the lacquer is
removed from the contact surfaces.
ƒ Ensure a large-surface connection of several mounting plates (e.g.
using earthing strip).
ƒ Connect controller, filters, and chokes to the earthed mounting plate
with a wire of large a cross-section as possible:
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 aerials.
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 due to 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 together over the
total length to prevent loops.
ƒ Connect all components (drive controller, choke, filter) to a central
earthing point (PE rail).
ƒ Create an earth system in star connection.
ƒ Comply with the corresponding minimum cable cross-sections.
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EDSVF9333V EN 3.0-06/2005