Detecting And Eliminating Emc Interferences - Lenze 9300 Series System Manual

5.3 Basics for wiring according to EMC
5.3.7

Detecting and eliminating EMC interferences

5.3.7 Detecting and eliminating EMC interferences
5.3−6
Fault Cause
Interferences of Unshielded motor cable
analog setpoints of
Shield contact is not extensive
your own or other
enough
devices and
Shield of the motor cable is
measuring systems
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
Conducted Terminal strips for the motor
interference level is cable are directly located next to
exceeded on the the mains terminals
supply side
Mounting plate varnished
HF short circuit
l
Remedy
Use shielded motor cable
Carry out optimal shielding as
specified
l
Separate components from
other component part with a
minimum distance of 100 mm
l 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:
l Remove varnish
l
Use zinc−coated mounting
plate
Check cable routing
EDSVF9383V EN 7.1−04/2012