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 compo‐
nents) 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 frequency converters with internal filter, the maximum
length of shielded cable between the motor and frequency
converter is 5 m.
● 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 fig. 9-6 "Control Cabinet
Mounting According to Interference Areas – Exemplary Arrangements" on
page 184.
We distinguish three areas:
1. Interference-free area of control cabinet (area A):
This includes:
● Supply feeder, input terminals, fuse, main switch, mains side of
mains filter for drives and corresponding connecting lines.
● Control voltage or auxiliary voltage connection with power supply
unit, fuse and other parts unless connection is run via the mains fil‐
ter of the AC drives.
● 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 oth‐
er and that the filter is jumped with regard to high frequency. Use the shortest
possible connecting lines.
Recommendation for complex systems: Install drive components in one cabi‐
net 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 bot‐
tom via short equipment grounding conductors with a cross section of at least
6 mm
2
or, even better, via grounding straps with the same cross section.
Make sure connection points have good contact.
DOK-RCON02-FV*********-IB08-EN-P Bosch Rexroth AG 183/259
Rexroth Frequency Converter Fv
Technical Data
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