Volatge Drop Caluculation

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vijaykumar0192 Participant Join Date: Aug 2010 Posts: 4	Volatge Drop Caluculation 08/20/2010 3:24 AM
	10 Sqmm 1 Core cu wire is using for 35m long. intial voltage is 220V, what is the voltage drop in that?
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#1 Re: volatge drop caluculation 08/20/2010 4:23 AM
	Insufficient information. How many amps (or how many kw/hp) of the motor? __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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Anonymous Poster	#2 Re: volatge drop caluculation 08/20/2010 4:27 AM
	Complete your question by mentioning the total demand load on this cable or total ampere. by the way, Can you tell me the voltage drop formula?
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Randall Guru Join Date: Aug 2005 Location: Hemel Hempstead, UK Posts: 5826 Good Answers: 322	#3 Re: voltage drop calculation 08/20/2010 4:29 AM
	It depends on the current let me google that for you __________________ If you spend all your time looking for people and things to complain about: trust me, you will find plenty to complain about.
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Lspraba Commentator Join Date: Sep 2008 Location: India Posts: 91 Good Answers: 6	#4 Re: Volatge Drop Caluculation 08/20/2010 6:34 AM
	If only 1 core copper wire then voltage drop is zero.(open circuit)
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Turbotroll3 Power-User Join Date: Oct 2008 Location: Houston, Texas Posts: 252 Good Answers: 5	#5 In reply to #4 Re: Volatge Drop Caluculation 08/20/2010 4:43 PM
	I was tempted to give this answer but I didn't know the frequency. If the wire were near a quarter wave length, the voltage drop would be very negative. ;) __________________ If the software can detect, compensate, avoid, or correct an anomalous condition in the system, it is, by definition, a software problem-regardless of the root cause. In the long run, for most classes of problems, it is cheaper to fix it in the SW
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Lspraba Commentator Join Date: Sep 2008 Location: India Posts: 91 Good Answers: 6	#6 In reply to #5 Re: Volatge Drop Caluculation 08/20/2010 5:48 PM
	This can happen, if both lines are of same length or may be in grounded system and in high frequency.
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jg Participant Join Date: Jul 2010 Posts: 1	#7 Re: Volatge Drop Caluculation 08/21/2010 12:06 AM
	If it is dc voltage then the drop can be calculated by using formula: Vd = (2IRlt) / 1000 where, Vd= voltage drop I = current R = resistance of the cable per km l = length of the cable t = tempaerature coefficient that can be get from cable manufacturer's catalogue If it is single phase ac supply then: Vd = (IRl*t) / 1000 Thanks
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anas ahammed Participant Join Date: Aug 2010 Posts: 4	#8 Re: Volatge Drop Caluculation 08/21/2010 12:51 AM
	R = resistivity length/area Power = Voltage voltage / R Power = V* I I =P /R voltage drop =I R I hope these equations are enough for you to solve the problem
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Le_Noble Power-User Join Date: Feb 2008 Location: Beirut Lebanon Posts: 197 Good Answers: 8	#9 Re: Volatge Drop Caluculation 08/21/2010 4:26 AM
	Kumar, Voltage drop is R*I R resistance of the wire R= RoxL / S Ro, resistivity of copper = 0.01724 where L is in meters and S in SQ mm applying this formula you will get 0.12V drop for each amp flowing in the wire ( assuming it is single phase load, wire lenght = 35x2) __________________ dont say it, write it
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Join Date: Mar 2009

Posts: 51

Good Answers: 4

#10

08/23/2010 3:19 AM

Voltage Drop = 1.732 IFL ( R COS Ø + X SIN Ø )

KW ( Maximum Demand)

IFL ( Full Load current of Circuit in Amps.)

L ( Route Length of Cable in Km. )

R ( Resistance of Cable conductor in Ohms/ Km. )

X ( Reactance of Cable conductor in Ohms/ Km. )

COS Ø & SIN Ø can be found in Manufacturer catalogue

ral8452 Participant Join Date: Jun 2010 Posts: 4	#11 Re: Volatge Drop Caluculation 08/23/2010 9:12 AM
	there are online voltage drop calculators, i would use them see mikeholt.com there are others, google search will find them
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