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Bosch Rexroth AG
EMC Measures for Design and Installation
Connecting the Mains Choke
Installing the Motor Power Cable
6.2
EMC-Optimal Installation in Facility and Control Cabinet
6.2.1
General Information
6.2.2
Division Into Areas (Zones)
Keep connection lines of the mains choke at the drive controller as short as
possible and twist them.
●
Use shielded motor power cables or run motor power cables in a shiel‐
ded duct
●
Use the shortest possible motor power cables
●
Ground shield of motor power cable at both ends over the largest possi‐
ble surface area to establish a good electrical connection
●
Run motor lines in shielded form inside the control cabinet
●
Do not use any steel-shielded lines
●
The shield of the motor power cable mustn't be interrupted by mounted
components, such as output chokes, sine filters or motor filters
For EMC-optimal installation, a spatial 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 sepa‐
rate control cabinet panel for the drive components.
Exemplary arrangements in the control cabinet: See section
Mounting According to Interference Areas - Exemplary Arrangements,
page
49.
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 isn't any unwanted interference injection from one area to the other
and that the filter is jumpered 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.
DOK-INDRV*-KCU02*UL***-IN01-EN-P
Rexroth IndraDrive Mi Electronic Control System KCU02
Control Cabinet
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