Danfoss VLT DriveMotor FCP 106 Design Manual page 22

Product Overview
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1 Ground wire
2 Shield
3 AC mains supply
Illustration 2.18 Equivalent Diagram: Coupling of Capacitors, which Generates Leakage Currents
When positioning a shield on a drive mounting plate, the
mounting plate must be made of metal. Metal mounting
plates ensure that the shield currents are conveyed back to
the unit. Moreover, ensure good electrical contact from the
mounting plate through the mounting screws to the drive
enclosure.
When unshielded cables are used, some emission
requirements are not complied with, although most
immunity requirements are observed.
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VLT
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Danfoss A/S © 12/2018 All rights reserved.
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DriveMotor FCP 106
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5 Shielded motor cable
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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.
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MG03M302