Danfoss FC 300 Design Manual page 138

6. How to Install
6
6.14: EMC-compliant electrical installation of an adjustable frequency drive in a cabinet.
6.8.2. Use of EMC-Compliant Cables
Danfoss recommends braided shielded/armored cables to optimize EMC immunity of the control
cables and the EMC emission from the motor cables.
The ability of a cable to reduce the in and outgoing radiation of electric noise depends on the
transfer impedance (Z
electric noise; however, a shield with a lower transfer impedance (Z
a shield with a higher transfer impedance (Z
Transfer impedance (Z
transfer impedance (Z
Transfer impedance (Z
-
138
). The shield of a cable is normally designed to reduce the transfer of
T
) is rarely stated by cable manufacturers, but it is often possible to estimate
T
) by assessing the physical design of the cable.
T
) can be assessed on the basis of the following factors:
T
The conductibility of the shield material.
MG.33.B9.22 - VLT
) value is more effective than
T
).
T
® is a registered Danfoss trademark.
FC 300 Design Guide