3.5 Core Concentric cable

[Anil Thapa]

Cable shown in image is 1.1kv 3.5C X 240 Sq.mm., What are the advantages this construction comparing to conventional 3.5C cable construction?
Where is Neutral or Earth core? What about Harmonic effect? How to terminate it?
My interest is to know what is corresponding specification and which country Make this type of cables?

 

[7anoter4]

Perhaps the most effective AC cable design is the three-conductor concentric triplex design shown in Fig. 8.19.
Because each of the three layers of insulation must be fairly thin for the cable to be flexible, it seems to be most effective for low-to medium-voltage levels. The design has many advantages because it has no stray magnetic fields, a very low inductance, and it uses less superconducting material than the other designs. However, it does require special wound insulation that is permeated with liquid nitrogen. See:

https://www.sciencedirect.com/topics/engineering/cable-design

 

[Anil Thapa]

Any engineers can share more on regards or explain more.

Thanks !

 

[cuky2000]

Are you sure that this picture is a superconducting cable?

 

[Anil Thapa]

it is not a superconducting cable.

 

[cuky2000]

Below is a similar concentric power cable to the one presented in the post above.
This type of cable is less common in the USA and Europe. There is limited information that we can offer regarding performance and operation experience at least in the market listed above. Appears this type of cable is available in Asia and starts experimenting in Brazil in an anti-theft project sponsored by the USAID.

Q1) What are the advantages of this construction compared to conventional 3.5C cable construction?
R1) More efficient, smaller diameter, less insulating material, and uniform dielectric stresses.

Q2) Where is Neutral or Earth core? The neutral is the outside layer similar to the single conductor with concentric neutral.

Q3) What about the harmonic effect? Not sure

Q4) How to terminate it? See the picture below.

Q5) My interest is to know what is the corresponding specification and which country Makes this type of cables? 1) Nexans, for the Brazilian market (Link) and Henan Jiapu Cable in China Link