Connection of Mains Choke
Keep connection lines of the mains choke at the drive controller as short as
possible and twist them.
Installation of Motor Power Cable
● Use shielded motor power cables or run motor power cables in a shielded
duct
● Use the shortest possible motor power cables
● Ground shield of motor power cable at both ends over the largest possible
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
6.2 EMC-Optimal Installation in Facility and Control Cabinet
6.2.1 General Information
For EMC-optimal installation, a spatial 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.
6.2.2 Division Into Areas (Zones)
Exemplary arrangements in the control cabinet: See section Control Cabinet
Mounting According to Interference Areas - Exemplary Arrangements,
page 42.
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 filter
of the AC drives
● All components that are not electrically connected with the drive sys‐
tem
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 cabinet
and the control units in a second, separate cabinet.
40/65 Bosch Rexroth AG | Electric Drives
and Controls
Rexroth IndraDrive | Instruction Manual
EMC Measures for Design and Installation
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