Lenze 8400 - Manual (Page 175)

Electrical installation
Installation according to EMC (installation of a CE-typical drive system)
Detecting and eliminating EMC interferences
6

175 EDS84ASC552 EN 9.1
6.2.7 Detecting and eliminating EMC interferences
Fault Cause Remedy
Interferences of analog
setpoints of your own or
other devices and
measuring systems
Unshielded motor cable Use shielded motor cable
Shield contact is not extensive enough Carry out optimal shielding as specified
Shield of the motor cable is interrupted
by terminal strips, switched, etc.
 Separate components from other
component part with a minimum
distance of 100 mm
 Use motor choke/motor filter
Install additional unshielded cables
inside the motor cable (e.g. for motor
temperature monitoring)
Install and shield additional cables
separately
Too long and unshielded cable ends of
the motor cable
Shorten unshielded cable ends to
maximally 40 mm
Conducted interference
level is exceeded on the
supply side
Terminal strips for the motor cable are
directly located next to the mains
terminals
Spatially separate the terminal strips for
the motor cable from main terminals
and other control terminals with a
minimum distance of 100 mm
Mounting plate varnished Optimise PE connection:

Remove varnish
 Use zinc-coated mounting plate
HF short circuit Check cable routing