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sesugh
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HV Cables

01/28/2013 4:36 AM

What are the conditions/factors of using a HV cable for LV application?
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PWSlack
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#1

Re: HV cables

01/28/2013 4:39 AM

The sanity of the designer would be one of them.

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#4
In reply to #1

Re: HV cables

01/28/2013 5:59 AM

The purpose of cables is to transfer power from one place to another. At LV, a cable is capable of transferring far less power than at HV, as the cross-sectional-area [CSA] of the conductor is far smaller than a suitable cable for the same power at LV. Further, there is a deficit of cable management equipment and techniques for using HV cables for LV applications. So it is far better to use the correct equipment for the job.

One wouldn't use a 50cc moped to travel from London to Vladivostock; why would one use an HV cable for an LV application (rhetorical question - NNTR)?

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jack of all trades
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#6
In reply to #1

Re: HV cables

01/28/2013 1:45 PM

Now now, some people may want to wire their house up in 50mm2 33kV XLPE screened cable.

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electronick
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#2

Re: HV cables

01/28/2013 5:00 AM

why would you do that? cables cost money, you know?

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truth is not a compromise
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#3

Re: HV cables

01/28/2013 5:02 AM

The most common condition/factor:functional insipience exceeds minimum detectable levels.

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jack of all trades
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#5

Re: HV Cables

01/28/2013 1:43 PM

Sheer desperation.

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JWthetech
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#7

Re: HV Cables

01/28/2013 6:26 PM

Cost plus Gubmint job?
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gmphadte
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#8

Re: HV Cables

01/29/2013 5:58 AM

HV cable is already in stock and is surplus!!!

Gajanan Phadte
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7anoter4
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#9

Re: HV Cables

01/29/2013 9:31 AM

If you already have this cable- as gmphadte said- and you cannot sell it and buy a cheaper low voltage instead of, then you may use it but there are some restrictions:

If a screen or shield exists you have to ground it and just in a single point.

Second, as insulation is thicker a derating factor will be necessary-in open free air

mainly. The shield also-even grounded at one end-will add some watt/feet to overall losses. But the derating factor is still not important.

The permissible bending radius will be less- due to shield presence. The shield copper could facilitate steel corrosion on contact-if any.

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7anoter4
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#10
In reply to #9

Re: HV Cables

01/30/2013 5:51 AM

My mistake: "The permissible bending radius will be less- due to shield presence" has to be:

"The permissible bending radius shall be bigger- due to shield presence".

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#11

Re: HV Cables

02/07/2013 12:43 AM

Hi , try using MV cable for the intermediate sections

Greetings M & L
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7anoter4 (2); Anonymous Poster (1); electronick (1); gmphadte (1); jack of all trades (2); JWthetech (1); PWSlack (2); truth is not a compromise (1)

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