their machine/installation has to be complied with for their finished prod‐
uct "machine/installation". The authorities and test laboratories responsi‐
ble for EMC normally refer to this product standard.
This documentation specifies the EMC properties which can be achieved, in
a machine or installation, with a drive system consisting of the standard com‐
ponents.
It also specifies the conditions under which the indicated EMC properties can
be achieved.
10.3
Measures to Reduce Noise Emission
10.3.1
General Information
To reduce noise emission, there are mainly three possible measures:
●
Filtering by means of mains filter
●
Shielding by mounting and shielded cables
●
Grounding by electrical bonding
Noise Emission of the Drive Sys‐
tems
In order to comply with the limit values for noise emission (mainly line-based
radio interference of more than 9 kHz) at the connection points of the ma‐
chine or installation, observe the notes on application contained in this docu‐
mentation.
10.3.2
Shielding
Sufficient metallic shielding prevents radiation into the air. This is achieved by
mounting the devices in a grounded control cabinet or in a housing (metallic
encapsulation). The shielding of line connections is realized by shielded ca‐
bles and lines, the shield has to be grounded over a large surface area.
To connect the shield at the motor, a suitable PG gland with shield connec‐
tion can be used. Make sure that the connection between the motor terminal
box and the motor housing has a low impedance (if necessary, use an addi‐
tional grounding strap). Never use plastic motor terminal boxes!
10.3.3
Grounding
Grounding discharges interference to ground and makes it flow back to the
source of interference over the shortest distance. Realize grounding via a
sufficiently short connection over the largest possible surface area in order to
achieve low inductive resistance with a low degree of line inductance. The
higher the frequency of disturbances, the lower the line inductance of ground‐
ing has to be.
In ungrounded mains, the measure "grounding" cannot be gener‐
ally used.
10.3.4
Filtering
Filtering prevents emission of noise via the lines, especially via the mains
connection. For this purpose, there are special interference suppression fil‐
ters available with which
●
the allowed limit values of the line-based interference emission can be
complied with in the range of 50 kHz to 30 MHz.
●
interference via the mains connection to devices connected near by
(e.g., control unit components) can be reduced.
DOK-INDRV*-SYSTEM*****-PR06-EN-P
Rexroth IndraDrive Drive Systems with HMV01/02 HMS01/02, HMD01, HCS02/03
Bosch Rexroth AG
187/309
Electromagnetic Compatibility (EMC)
