7-24 Arranging the Components in the Control Cabinet Rexroth IndraDrive
DOK-INDRV*-SYSTEM*****-PR02-EN-P
Design and Installation in Interference-Free Area of
Control Cabinet (Area A)
When arranging the components in the control cabinet, make sure that
the components and electrical elements (switches, pushbuttons, fuses,
terminal connectors) in the interference-free zone A are placed with a
distance of at least d1 = 200 mm to the components in both other zones B
and C.
In particular, a distance of at least d2 = 500mm has to be kept in zone A
between magnetic components, such as transformers, line reactors and
DC-link reactors, that are directly connected to the power terminals of the
drive system and the interference-free components and lines between
supply system and filter including the mains filter. If this distance is not
kept, the magnetic leakage fields are injected to the interference-free
components and lines connected to the mains so that the limit values at
the supply connection are exceeded in spite of the installed filter.
The distance between the power input line and the lines between filter
and exit point from the control cabinet in area A and the lines in areas B
and C must be at least 200 mm (distances d1 and d3 in the figure) at all
points.
If this is impossible, there are two alternatives:
• Install these lines with a shield and connect the shield, at several
points, but at least at the beginning and at the end of the line, to the
mounting plate or the control cabinet housing over a large surface
area, or:
• Separate these lines from the other interference-susceptible lines in
zones B and C by means of a grounded distance plate vertically
attached to the mounting plate.
In addition, these lines have to be kept as short as possible within the
control cabinet and installed directly on the grounded metal surface of the
mounting plate or of the control cabinet housing.
Mains supply lines from zones B and C must not be connected to the
mains without a filter.
Note: In case the information on cable routing given in this section is
not observed, the effect of the mains filter is totally or partly
neutralized. You must therefore expect the noise level of the
interference emission to be higher within the range of 150 kHz
to 40 MHz and the limit values at the connection points of the
machine or installation to be exceeded.
If a neutral conductor is used together with a three-phase connection, it
must not be installed unfiltered in zones B and C, in order to keep
interference off the mains.
Single-phase or three-phase supply lines of motor ventilators, that are
usually routed in parallel with motor cables or interference-susceptible
lines, also have to be provided with a filter. They either have to be filtered
via a separate NFE single-phase filter or NFD three-phase filter near the
supply connection of the control cabinet, or to be connected at the load
side of the existing NFD three-phase filter for the power connector of the
drive system. When switching power off, make sure the ventilator is not
switched off.
Arranging the Components in
the Control Cabinet
Cable Routing of the
Interference-Free Lines to the
Mains Connection
Routing and Connecting a
Neutral Conductor (N)
Connecting Motor Blowers
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