Detecting And Eliminating Emc Interferences - Lenze 8400 Hardware Manual

Installation according to EMC (installation of a CE-typical drive system)
6.2.7

Detecting and eliminating EMC interferences

Fault
Interferences of analog
setpoints of your own or
other devices and
measuring systems
Conducted interference
level is exceeded on the
supply side
EDS84ASC552 EN 10.0
Detecting and eliminating EMC interferences
Cause
Unshielded motor cable
Shield contact is not extensive enough
Shield of the motor cable is interrupted
by terminal strips, switched, etc.
Install additional unshielded cables
inside the motor cable (e.g. for motor
temperature monitoring)
Too long and unshielded cable ends of
the motor cable
Terminal strips for the motor cable are
directly located next to the mains
terminals
Mounting plate varnished
HF short circuit

Electrical installation
Remedy
Use shielded motor cable
Carry out optimal shielding as specified
Separate components from other

component part with a minimum
distance of 100 mm
Use motor choke/motor filter

Install and shield additional cables
separately
Shorten unshielded cable ends to
maximally 40 mm
Spatially separate the terminal strips for
the motor cable from main terminals
and other control terminals with a
minimum distance of 100 mm
Optimise PE connection:
Remove varnish

Use zinc-coated mounting plate

Check cable routing
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