Motor Cables - Danfoss VLT AutomationDrive FC 300 Design Manual

6. How to Install
Input polarity of control terminals
6
See section entitled
Armoured Control Cables
mination of control cables.

6.3.10. Motor Cables

See section
length.
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6.3.11. Electrical Installation of Motor Cables
Screening of cables
112
NB!
Control cables must be screened/armoured.
Earthing of Screened/
for the correct ter-
General Specifications
for correct dimensioning of motor cable cross-section and
Use a screened/armoured motor cable to comply with EMC emission specifications.
Keep the motor cable as short as possible to reduce the noise level and leakage currents.
Connect the motor cable screen to both the decoupling plate of the FC 300 and to the
metal cabinet of the motor.
Make the screen connections with the largest possible surface area (cable clamp). This
is done by using the supplied installation devices in the FC 300.
Avoid mounting with twisted screen ends (pigtails), which will spoil high frequency
screening effects.
If it is necessary to split the screen to install a motor isolator or motor relay, the screen
must be continued with the lowest possible HF impedance.
MG.33.B9.02 - VLT ® is a registered Danfoss trademark
FC 300 Design Guide