VFD Output Motor Cable Number of Cores 5

[ThePunisher]

I observed that all VFD motor cables are 3core construction. I would like to understand why a 3 x 1c VFD output cable cannot be used.

I have a medium voltage VFD controlling a 1000kW, 4kV induction motor. I am insisting to use 3 core but our client is looking on single core arrangement because that is what their previous consultant recommended. In this regard your expert opinion or reference will bemush appreciated.

 

[cuky2000]

Enclosed are some application notes from various sources associated with VFD for two 7500 HP motors at 4.16 kV that we recently specified for ID fan in a power plant environment.

The cable type and reformation from the manufacturer varies significantly in accordance with the VFD design parameter, number of pulses, filters, etc.

During the bid process, some manufacturers recommended using three single shielded cables installed in metallic conduit. If triplex cable was used, it must have three symmetrical grounds.

For EMI reasons, the project in concurrence with the VFD manufacturer decided to use triplex cable in cable tray.

 

[ThePunisher]

Cuky2000, I can't open the file that you have attached with your post.