K1
External mains contactor for supply units and converters without inte‐
grated mains contactor
M
L
Motor blower
NT
Power supply unit
Q2
Fusing
T
Transformer
Z1, Z2
Shield connection points for cables
*
Not allowed at HNF mains filter
Fig.6-2:
Infeeding Supply Unit or Converter – EMC Areas in the Control Cabinet
6.2.4
Design and Installation in Area A - Interference-Free Area of Control
Cabinet
Arranging the Components in the
Control Cabinet
Comply with a distance of at least 200 mm (distance d1 in the figure):
●
Between components and electrical elements (switches, pushbuttons,
fuses, terminal connectors) in the interference-free area A and the com‐
ponents in the two other areas B and C
Comply with a distance of at least 400 mm (distance d4 in the figure):
●
Between magnetic components (such as transformers, mains chokes and
DC bus chokes that are directly connected to the power connections of
the drive system) and the interference-free components and lines between
mains and filter including the mains filter in area A
If these distances are not kept, the magnetic leakage fields are injected to the
interference-free components and lines connected to the mains and the limit
values at the mains connection are exceeded in spite of the installed filter.
Cable Routing of the Interference-
Free Lines to the Mains Connection
Comply with a distance of at least 200 mm (distance d1 and d3 in the figure):
●
Between supply feeder or lines between filter and exit point from the con‐
trol cabinet in area A and the lines in area B and C
If this is impossible, there are two alternatives:
1.
Install lines in shielded form and connect the shield at several points (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.
2.
Separate lines from the other interference-susceptible lines in areas B and
C by means of a grounded distance plate vertically attached to the mount‐
ing plate.
Install the shortest possible lines within the control cabinet and install them
directly on the grounded metal surface of the mounting plate or of the control
cabinet housing.
Mains supply lines from areas B and C must not be connected to the mains
without a filter.
In case you do not observe the information on cable routing given
in this section, the effect of the mains filter is totally or partly neu‐
tralized. This will cause 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 will
thereby be exceeded.
Routing and Connecting a Neutral
Conductor (N)
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.
Motor Blower at Mains Filter
Single-phase or three-phase supply lines of motor blowers, that are usually
routed in parallel with motor power cables or interference-susceptible lines,
must be filtered:
DOK-INDRV*-HMS02*UL***-IB03-EN-P
Rexroth IndraDrive Drive Controllers Power Sections HMS02
Bosch Rexroth AG
51/67
EMC Measures for Design and Installation
