9.3.2 EMC-optimal Installation in Facility and Control Cabinet
General Information
For EMC-optimal installation, a special separation of the interference-free area
(mains connection) and the interference-susceptible area (drive components) is
recommended, as shown in the figures below.
● For EMC-optimal installation in the control cabinet, use a separate
control cabinet panel for the drive components.
● Frequency converters need to be mounted in metal cabinet and
connected to power supply with grounding.
● For motor cables used in the EMC test of the frequency convert-
ers, see chapter 6.2.3 "Maximum Length of Motor Cables" on
page 30.
● For the end application system with frequency converters, the
conformity of EMC directions needs to be confirmed.
Division into Areas (zones)
Exemplary arrangements in the control cabinet: See chapter 9.3.3 "Control Cab-
inet Mounting according to Interference Areas – Exemplary Arrangements" on
page 78.
We distinguish three areas:
1. Interference-free area of control cabinet (area A):
● Supply feeder, input terminals, fuse, main switch, mains side of mains
filter for drives and corresponding connecting lines
● All components that are not electrically connected with the drive system
2. Interference-susceptible area (area B):
● Mains connections between drive system and mains filter for drives,
mains contactor
● Interface lines of drive controller
3. Strongly interference-susceptible area (area C):
● Motor power cables including single cores
Never run lines of one of these areas in parallel with lines of another area so
that there is not any unwanted interference injection from one area to the other
and that the filter is jumped with regard to high frequency. Use the shortest pos-
sible connecting lines.
Recommendation for complex systems: Install drive components in one cabinet
and the control units in a second, separate cabinet.
Badly grounded control cabinet doors act as antennas. Therefore, connect the
control cabinet doors to the cabinet on top, in the middle and on the bottom via
short equipment grounding conductors with a cross section of at least 6 mm
2
or,
Bosch Rexroth AG
Electromagnetic Compatibility (EMC)
EFC x610 Series
76/389
DOK-RCON03-EFC-X610***-IT05-EN-P
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