If the screen is to be placed on a mounting plate for the frequency converter, the mounting plate must be made of metal, because the screen currents
have to be conveyed back to the unit. Moreover, ensure good electrical contact from the mounting plate through the mounting screws to the frequency
converter chassis.
NB!
When unscreened cables are used, some emission requirements are not complied with, although the immunity requirements are ob-
served.
In order to reduce the interference level from the entire system (unit + installation), make motor and brake cables as short as possible. Avoid placing
cables with a sensitive signal level alongside motor and brake cables. Radio interference higher than 50 MHz (airborne) is especially generated by the
control electronics.
VLT
®
AQUA Drive Design Guide 2 Introduction to VLT AQUA Drive
MG.20.N5.02 - VLT
®
is a registered Danfoss trademark
27
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