Danfoss VLT DriveMotor FCP 106, Руководство по конструкции

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175ZA062.12
1 Ground wire 4 Frequency converter
2 Screen 5 Screened motor cable
3 AC mains supply 6 Motor
Illustration 2.18 Equivalent Diagram: Coupling of Capacitors, which Generates Leakage Currents
When positioning a screen on a frequency converter
mounting plate, the mounting plate must be made of
metal. Metal mounting plates ensure that the screen
currents are conveyed back to the unit. Moreover, ensure
good electrical contact from the mounting plate through
the mounting screws to the frequency converter enclosure.
When unscreened cables are used, some emission
requirements are not complied with, although most
immunity requirements are observed.
To reduce the interference level from the entire system
(unit+installation), keep motor cables as short as possible.
Avoid placing cables with a sensitive signal level alongside
motor cables. Particularly, control electronics generate
radio interference higher than 50 MHz (airborne). See
chapter 2.6.1 EMC-compliant Electrical Installation for more
information on EMC.
Product Overview Design Guide
MG03M202 Danfoss A/S © 06/2016 All rights reserved. 21
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