graphite coating of power cables
graphite coating of power cables
(OP)
what is the graphite coating is used for in a power cable?
thanks
thanks
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graphite coating of power cables
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graphite coating of power cablesgraphite coating of power cables(OP)
what is the graphite coating is used for in a power cable?
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RE: graphite coating of power cables
Sounds like maybe it’s compounded to make the semicon passes conductive.
RE: graphite coating of power cables
Some graphite will be scraped off during installation, however the user must scrape down into the HDPE or other sheath material to completely remove the conductive graphite. This allows the cable owner to ensure the cable was pulled and laid properly before energising.
Plus it gives the jointers and cable pullers something extra to complain about, when they come home covered in black graphite.
RE: graphite coating of power cables
RE: graphite coating of power cables
I didn't get the second part of your response.can you
please give a little more explanation?
RE: graphite coating of power cables
RE: graphite coating of power cables
The semicon layer that I think paged and vector9 are describing is for stress control and corona minimisation which can be caused by the non circular nature of copper stranded conductors. This is described as the conductor screen, and is usually extruded over the conductors (in extruded cable technology) to provide a circular equipotential surface. The same applies to the insulation screen, where a semicon layer is applied over the bulk insulation (under the earth screen), again to provide a stress free surface. The graphite goes on the outside of the cable, outside the metallic earth screen, hence it is outside the insulation electric field.
Hope this helps
RE: graphite coating of power cables
RE: graphite coating of power cables
http://www.chinacables.com/xlpe1.htm
http://www.cvalim.co.il/products/powerdata.asp?id=30
(with semiconducting graphite coating)
etc. for more info
RE: graphite coating of power cables
I can, perhaps, bend the tube and apply coat of this semiconducting material.
Can some one tell me if such material exists.
RE: graphite coating of power cables