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Topic Title: Need Urgent Help About Voltage Drop!
Topic Summary: for cables thicker than 25mm2 csa!!!
Created On: 27 September 2013 04:16 PM
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 27 September 2013 04:16 PM
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MuratCypriot

Posts: 21
Joined: 28 June 2013

I need to calculate voltage drop for cables thicker than 25mm2 csa (particullary N2XH cables - XLPE insulation) as you know for cables thicker than there is no fixed "g" number to use because of the reactance of thicker cables. There are "r" "x" & "z" parts to calculate "g", but i dont know how to use those components to get the final value of voltage drop per amper per meter.

I am looking forward to get fast help, plase
 27 September 2013 04:38 PM
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Avatar for redtoblackblewtopieces.
redtoblackblewtopieces

Posts: 208
Joined: 10 January 2013

Do you know the load power factor ? If not use z so volt drop would equal (mV/A/m)z.L.Ib devided by 1000
Kevin

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 27 September 2013 06:17 PM
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MuratCypriot

Posts: 21
Joined: 28 June 2013

Thanks a lot Kevin!!! So its ok to use Z, i thought i will take square of r and x in square root. But i think this yield smillar result. My loads are mixed, some of them resistive some of them are both resistive and reactive. But i think its okay to assume 0.8 for power factor!!!
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