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How can I compute voltage drop and cable size over distance?

user-image
تم إضافة السؤال من قبل dana tutunji , Architect , Helou Trading Co
تاريخ النشر: 2013/06/26
Balamurugan Ganesamoorthi
من قبل Balamurugan Ganesamoorthi , Electrician , Prime star L.L.C

 

This is calculator for the voltage drop of an eletrical circuit based on the wire size and load current.  

VD=I×(2×L×R/1000)

M Ajmal Hassan
من قبل M Ajmal Hassan , Junior engineer , Warsak dam,Lightbridge communications corporation,Electromech engineering service.

This calculator assume the circuit is operate in a normal condition room temperature with normal frequency.The actual voltage drop can vary depend on the condition of the wire, the conduit being used the temperature the connector the frequency etc.

Tauseef Jamal
من قبل Tauseef Jamal , student for experience , cpi

its simple get a high quality wire and use stabilizer for more

CHRISTIAN BARIA
من قبل CHRISTIAN BARIA

  1. this is the calculation of voltage drop of an electrical circuit based on the size of wire, distance and anticipated load current

mahboob ghulamrasool
من قبل mahboob ghulamrasool , electrical foreman , ibs co ksa

wire material

wire size

voltage

phase

number of conductor

distance

load current

 

 

 

 

 

Dipin Raj Rajeev
من قبل Dipin Raj Rajeev , Project Engineer , Integrated Ideal Solutions LLC

Hi,

To compute the voltage drop and cable size, you require the folowing data.

1) The total load you wish to run with the concerned cable.

2) Corresponding current for that particulat load. (To be on a safer side you can assume 2 times the load in kW or else you can apply the formula for power to get the exact current)

3)Once you know how much current the cable is gonna carry you can easily finalize the rating of protection device (ACB,MCCB, etc.,).

4)For the time being you can assume the standard cable size corresponding to your switchgear rating and as per your auhtority standards.

5)Length of the cable from the starting end to receiving end.

6)Voltage drop/Ampre/Metre which you will get from the cable supplier (in mV).

Once you get all the above data, the voltage drop can be calculated as follows.

Voltage drop=(voltage drop/ampere/metre)xlengthxcurrent. This will be in mV. Just divide by 1000 to get the voltage drop in volts.

Hope this clarifies your question.

 

Regards,

Dipin

 

 

BENSON MAVUTI
من قبل BENSON MAVUTI , SSGT/ELECTRICIAN , KANYA ARMED FORCES

BY USING STEP UP VOLTAGE REGULATORS,OR BY PUTTING UP PILLARS WITH HRC FUSES

chukwudi rapheal alaeto
من قبل chukwudi rapheal alaeto , Casual Worker , Honest International Trade Limited.

BY USING STEP UP VOLTAGE REGULATOR

JAmes JAY
من قبل JAmes JAY , senior technicien , emmaco electricals

BY USING SERGE GUARD TO PROTECT YOUR DEVICES AND SECIRE LOAD STABILIZATION

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