Danfoss VLT HVAC Drive FC 100 Series Design Manual page 116

5. How to Install
Transfer impedance (Z
- The conductibility of the screen material.
- The contact resistance between the individual screen conductors.
- The screen coverage, i.e. the physical area of the cable covered by the screen - often stated as a percentage value.
- Screen type, i.e. braided or twisted pattern.
a. Aluminium-clad with copper wire.
b. Twisted copper wire or armoured steel wire cable.
c. Single-layer braided copper wire with varying percentage screen
coverage.
This is the typical Danfoss reference cable.
d. Double-layer braided copper wire.
5
e. Twin layer of braided copper wire with a magnetic, screened/
armoured intermediate layer.
f. Cable that runs in copper tube or steel tube.
g. Lead cable with 1.1 mm wall thickness.
116
) can be assessed on the basis of the following factors:
T
MG.11.B7.02 - VLT ® is a registered Danfoss trademark
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VLT HVAC Drive Design Guide