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devutti
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Join Date: Dec 2010
Posts: 3

Cable Sizing and Voltage Drop

12/09/2010 6:04 AM

Dear sir,

I need some information related to voltage drop in burried cable. we choose the cable 0.6 1kv- 3x240mm2 xlpe. maximum ampere requirement is 410.volatage rating 400v. distance is 300 meter.pls let me know the calculation method and % value.

jayan
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#1

Re: cable sizing and voltage drop

12/09/2010 6:09 AM

→ British Standard 7671.

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#2
In reply to #1

Re: cable sizing and voltage drop

12/09/2010 7:36 AM

are we asking for any standard? hope u can understnd english..
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PWSlack
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#3
In reply to #2

Re: cable sizing and voltage drop

12/09/2010 7:42 AM

→ British Standard 7671! <sigh>

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TonyS
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#4

Re: Cable Sizing and Voltage Drop

12/09/2010 2:21 PM

BS7671 will give you the answer

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electricalexpert65
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#5

Re: Cable Sizing and Voltage Drop

12/10/2010 9:39 AM

Please refer to IS 1255. It lists the maximum permissible voltage drop per ampere per km for various sizes & types of cables. From the table given in the Standard, calculate the actual voltage drop for your cable type, size, length & amperage.

The maximum permissible voltage drop at motor terminals during steady state is 6% (as per IS 325) and during acceleration state is 15%. Check if your actual voltage drop fall swithin the above limits. If not, choose the next higher size cable and re-check.
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manroop
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Join Date: Mar 2010
Posts: 105
#6

Re: Cable Sizing and Voltage Drop

12/14/2010 5:34 AM

Dear Mr.Devutti,

Please visit the following site www.simplified office software.com .

There you will get a ready-rockener for Voltage Drops / Sizes of cables etc. It is

very useful.

Manroop.Chennai.
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Raghavendran R
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Join Date: Dec 2010
Location: Chennai
Posts: 40
#7

Re: Cable Sizing and Voltage Drop

12/20/2010 4:27 AM

Voltage drop on cables depend on various factor like resistance, Reactance of cable, number of runs and power factor, length of cable etc. The formula for the same is Voltage drop = rt 3xIxLx(Rcos(phi) + Xsin(phi))/no of runs. Hope this meets your requirement

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Anonymous Poster (1); electricalexpert65 (1); manroop (1); PWSlack (2); Raghavendran R (1); TonyS (1)

Previous in Forum: International Standards and Codes Required   Next in Forum: Temperature Controller Compatibility
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