34 Installation CG Drives & Automation 01-7492-01r1
Switches between the motor and the
AC drive
If the motor cables are to be interrupted by maintenance
switches, output coils, etc., it is necessary that the screening
is continued by using metal housing, metal mounting plates,
etc. as shown in the fig. 48.
Fig. 47 Screen connection of cables.
Pay special attention to the following points:
• If paint must be removed, steps must be taken to prevent
subsequent corrosion. Repaint after making connections!
• The fastening of the whole AC drive housing must be
electrically connected with the mounting plate over an
area which is as large as possible. For this purpose the
removal of paint is necessary. An alternative method is to
connect the AC drive housing to the mounting plate
with as short a length of litz wire as possible.
• Try to avoid interruptions in the screening wherever
possible.
• If the AC drive is mounted in a standard cabinet, the
internal wiring must comply with the EMC standard.
Fig. 48 shows an example of a AC drive built into a
cabinet.
Fig. 48 AC drive in a cabinet on a mounting plate.
Fig. 49 shows an example when there is no metal mounting
plate used (e.g. if IP54 AC drives are used). It is important
to keep the “circuit” closed, by using metal housing and
cable glands.
Fig. 49 AC drive as stand alone.
Screen connection
of signal cables
PE
Motor cable
shield connection
AC drive built into cabinet
AC drive
RFI-Filter
Mains
Metal EMC cable glands
Output coil (option)
Screened cables
Unpainted mounting plate
Metal EMC cable
glands
Screened cables
Metal housing
To Next Page
Loading...
Need help?
General
