Voltage Drop Problem | Long Distance Cable | Voltage Drop Calculation | Cable Size Selection Formula

Voltage Drop Problem | Long Distance Cable | Voltage Drop Calculation | Cable Size Selection Formula
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In this video, I have explained in malayalam What will be the effect of long cables ?
When the length of the cable increases, cable resistance also increases with length. So Load due to this resistance also increases, this load will create a voltage drop in the line. I.e. a percentage of voltage is lost in the line itself and if the cable is too long then the equipment connected will be having a voltage issue.
what is the maximum length of the cable recommended for using as per manufacturer's manual rated current ?
We use standard cable size as per the manufacturer manual maximum up to 75 meters only. If the length is more than 75 meters then the voltage drop in the line is to be considered and Permissible voltage drop in the cable should be below 3% of the rated voltage. If the Voltage drop is more than 3% of the rated voltage the next higher size cable needs to be used.
How Does Using the Next Higher Size Cable Helps When There Is More Voltage Drop?
When we use the next higher size cable, the cross-section area of conductor increases and resistivity decreases with the cross-section area. So load across the cable decreases with that and voltage drop decreases.
Voltage Drop Calculation
Voltage drop VD= ( Milli Volt X Ampere load X Length of cable)/1000
Percentage Voltage Drop for Single Phase = (VD X100)/240
Percentage Voltage Drop for 3 Phase = (VD X100)/415
Maximum percentage voltage drop should be below 3 %
Cable selection: 5 KW single phase pump 150 meter alway from Power supply.
For Single Phase P= VI X Pf
For 1KW or 1000 Watt , Current I = 1000 / ( 240X 0.85 ) = 5 A (Approx.)
So for 5 KW, current I = 25 A (Approx.)
As per chart for 25 A, single we need 4mm AYFY cable and
voltage drop / A / m =18.2 mV
Voltage Drop = (milli volt X Ampere X Length)/1000
= (18.2 X 25 X 150)/1000)= 68.25 V
For single phase Percentage Drop = (VD X100)/240
= (68.25 X 100)/240 =28.43 %
I.e. Volatge at load end = 240-68.25 = 171.75 V
Higher cable size of 35 mm AYFY cable and
voltage drop / A / m = 2.1 mV
Voltage Drop = (milli volt X Ampere X Length)/1000
= (2.1 X 25 X 150)/1000)= 7.875V
For single phase Percentage Drop = (VD X100)/240
= (7.875 X 100)/240 =3.28 %
I.e. Volatge at load end = 240-7.815 = 232.125 V
Higher cable size of 50 mm AYFY cable and voltage drop / A / m = 1.6 mV
Voltage Drop = (milli volt X Ampere X Length)/1000
= (16 X 25 X 150)/1000)= 6 V
For single phase Percentage Drop = (VD X100)/240
= (6X 100)/240 = 2.5 %
I.e. Volatge at load end = 240-6 = 234 V
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Query to solved in this video
voltage drop calculation in malayalam
voltage drop calculation
voltage drop calculation in long distance cable
voltage drop across cables
voltage drop calculation single phase
how to calculate voltage drop in cable
voltage drop physics malayalam
voltage drop over distance
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Amrut Shishir M
Electrical Consultant, Chartered Engineer
Kannur, Kerala
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#voltagedropcalculation #howtosizeelectricalcables #cablesizingcalculation #voltagedropforfeedercircuitcalculation #howtocalculatesizeofcable #cablesizecalculationinmalayalam #cablesizecalculation #shishiramengineeringservices #amrutshishir #electricalengineeringservices #electricalconsultantkannur #electricalconsultantkerala #electricalmalayalam #electricalkerala

[@dreamelectricals3020]

വളരെ ഉപകാരപ്രദം ........ എന്റെ വലിയ ഒരു പ്രശ്നം നിസാരവൽക്കരിച്ചതിന്

[@shishiram]

thank you...

[@anilkumargl3797]

താങ്കളുടെ വീഡിയോസ് എല്ലാം സൂപ്പർ ആണ്, വിദഗ്ധനായ ഒരു പ്രൊഫസറുടെ ക്ലാസ്സ്‌ പോലെ, 👍👍👍

[@jaseemjaseemm1582]

It is very very informative for designers 👏👏👏thankyou so much,keep going ,we are expecting more videos like this from you 🤝🤝🤝

[@shishiram]

check our online course for such videos shishirameng.com/courses/

[@noushadch9624]

ഡിസി വയറിങ്ങിനെ കുറിച്ചും അതിലെ വോൾടേജ് ഡ്രോപിനെ കുറിച്ചും ഒരു ടെക്നിക്കൽ വീഡിയോ ചെയ്യാമോ?

[@mustafamohsin6439]

Thank you sir. After watching your tutorials, I benefited

[@faziludeenm7071]

very useful and good class

[@kamalakshiammaap]

Can u please tell me the correct length extended cord for a black and decker grass cutter 350 watt machine and it's built-in cord having 16A 240 v 2p

[@pradipanp]

വളരെ ഉപകാരപ്രദമായ വീഡിയോ, ഇതുസംബന്ധിച്ചു ഇന്നലെ fB home design ഗ്രൂപ്പിൽ ഒരു പോസ്റ്റ് കണ്ടിരുന്നു. വന്യ മൃഗങ്ങളെ തുരത്തുവാൻ വേണ്ടിയുള്ള ഇലക്ട്രിക്കൽ ഫിൻ ലൈനിന്റെ പ്രവർത്തന രീതി വിശദീകരിച്ചുകൊണ്ടുള്ള വീഡിയോ ചെയ്യാമോ

[@shishiram]

Ok...i will explain in a video Stay subscribed with bell button pressed to all... If you liked the video, like and share to friends and family...

[@pradipanp]

@@shishiram sure

[@afsalpn9353]

Thanks voltage drop എന്ന് കേട്ടിട്ടുണ്ട് എന്ന് അല്ലാതെ ഇത് ഇത്ര പ്രശ്‌നം ഉണ്ടാകും എന്ന് ഇന്നാണ് അറിയുന്നത് thanks thank you very much

[@shishiram]

Welcome... Stay subscribed with bell button pressed.. If you find our video interesting , please like and share this video to friends and family...

[@chabdulnazer5130]

Sir veettil ninnum 160mtr distace und kinar njan eath cable use cheyyanam

[@vysakhvenugopal4817]

Please make video on UPS efficiency and minimum load to be provided for cost effective & what happen if we load after 80% of ups any instant impact.

[@mirshadvk6924]

Oru rumile le circuitil nunn loop cheyd ade roomile heaterilum, ac kum, ellengil kurarach power supplyilek loop cheydu. Ennal total power nokiyal mcb yul ulkollanavym engil voltage problem undavumo

[@kannanr6454]

Very helpful class sir thank u

[@sunilraj2914]

1.5 hp motor 150meter undu Ethu type wire use cheyyam

[@mazinalhabsi7802]

Useful 👍

[@diyaazaghloul756]

Amazing video thank you

[@rajappanvv1849]

High voltage distribution : used because to reduce power loss ; when voltage. increased the Ampre reduce as per Jules law

[@blessyvarghese2376]

Well said sir..... By using highvoltage we can reduce the cable size without voltage drop,so it is more ecconomical

[@shishiram]

good... ... Stay subscribe with bell button pressed. If you liked the video, Like and share to family and friends..

[@shahulmj7487]

Energy meter to first floor vare oru bulb Kathikumbol voltage drop engane kanakakam

[@shishiram]

No need to calculate voltage drop if distance is less than 75meters

[@shahulmj7487]

Thanks your valuable advais

[@shahulmj7487]

Floating nuetral oru vidio cheyyamo sir

[@abdusameerpullichola1394]

2 runs,3 runs cable selection yenkanea anu bro? Eg: 3 Run 3c x300 mm2 cable for Long distance how to select?

[@babythomas2902]

120 അടി ദൂരത്തിൽ 1HP മോട്ടോർ സ്ഥാപിച്ചു. ഇതിലേക്ക് അലുമിനിയം Cable അതായത് Single Phase Weather proof Cable കൊടുത്തിരിക്കുന്നു. ഇവിടെ കൂടുതൽ drop ഉണ്ടാകുമോ?

[@jyothishkumarkumar8809]

Thanks

[@shishiram]

Welcome... Stay subscribe with bell button pressed. If you liked the video, Like and share to family and friends..

[@ചെരാതുകൾ]

Sir ,earth wire size enganey calculate cheyyam

[@mailstomails10]

When the motor is in ON condition, if you measure the voltage at the source end and compare it with the motor terminal end, will there be any difference?

[@shafikp6766]

Surge Protection Device (SPD) oru video cheyyumo pls

[@shishiram]

Sure... Im planning one... Stay subscribed with bell button pressed to all... If you liked the video, like and share to friends and family...

[@premprasad5857]

Thanks sir 🙏

[@ajithkprabhakar1]

We can use 3 phase supply and cable of 16 square mm to reduce the cost

[@adharshga9806]

Long distance transmissionil distance koodumbo cable resistance koodum.. So I^2 R loss koodunnu. So step up transformer vech high voltage il transmit cheyyunnu

[@shishiram]

This actually we are using in industry... for submersible to pump oil from oil rig... watch this video... more more information.... kzbin.info/www/bejne/qXyaioFurad-rck

[@faziludeenm7071]

detailed information about mega tester

[@jaisonkuriakose5683]

Normally Single phase mechines current കൂടുതൽ withdraw ചെയ്യും അതുകൊണ്ട് വോൾട്ടേജ് കുറയാൻ സാധ്യത ഉണ്ട്....

[@samasafiyasafiya9973]

Good

[@shishiram]

Thanks... Stay subscribe and support...

[@Ramzan-Vettoor]

2000 Wന്റെ ചാർജർ 16AM ഇലക്ട്രിക്ക് ആട്ടോയുടെ ചാർജർ കണക്ട്‌ ചെയ്യാൻ എത്ര MM ന്റെ വയർ ഉപയോഗിക്കണം

[@MUHAMMAD-cz2fr]

Induced voltage (intension) angane pariharikkam?

[@shishiram]

I will make a video on it...later on... Stay subscribed with bell button pressed.. If you find our video interesting , please like and share this video to friends and family...

[@jihasvk8932]

Delta connection explain cheyamo, Delta connection circuit engane complete aavunnu?

[@shishiram]

Ok...i will explain in a video Stay subscribed with bell button pressed to all... If you liked the video, like and share to friends and family...

[@renjithravi6065]

Super

[@shishiram]

Thanks...... Stay subscribe with bell button pressed. If you liked the video, Like and share to family and friends..

[@asharafapk2073]

സർ വയറിന്റെ length calculate ചെയ്യുന്നതിൽ confusion വരുന്നുണ്ട് സാറി ന്റെ vedio യിൽ single phasil v drop calculate ചെയ്യുമ്പോൾ 150 meter അകലെ യുള്ള ലോഡിൽ phasum nuetralum lay ചെയ്യുന്നു so total distance 150*2=300meter അല്ലെ ഫോര്മുലയിൽ ചെയ്യേണ്ടത് Some Enginers ഇങ്ങനെ യാണ് ചെയ്യുന്നത് അത് you tubil തന്നെ കണ്ടിട്ടുണ്ട് അതുകൊണ്ടാണ് ചോദിക്കുന്നത് can u pls explain about it because being confused ur last vedio

[@adharshga9806]

Bro 2 core cable alle use cheyyane. 2 core aavumbol athil phase and neutral undallo. Pinne ath oru cable alle.. So 150m mathi..

[@arunyeshodaran211]

What about 24Vdc case?

[@afsalpn9353]

Sir എന്ത് കൊണ്ടാണ് ചെറിയ ലോഡ് ന് വലിയ കേബിൾ യൂസ് ചെയ്യാത്തത് ex നല്ല ഒരു cash ഉള്ള ആളാണ് ഹൗസിങ് owner എങ്കിലും ചെറിയ ലൈറ്റ് ലോഡ് (30w) പ്രവര്‍ത്തിക്കാന്‍ voltage drop വേണ്ട electric equipment nnum വയർ nnum നല്ല ലൈഫ് കിട്ടും എന്ന് കരുതി 4 mmsqm വയർ അല്ലെങ്കിൽ അതിൽ കൂടുതല്‍ കനം ഉള്ള wire ഉപയോഗിക്കുന്നില്ല cash ചെലവ് അല്ലാതെ technical error വല്ലതും ഉണ്ടോ pls reply me sir

[@shishiram]

No need to use big cables for small loads... just use as per standards... that is enough...

[@sujinsreedharan4915]

Why Voltage drop/A/m is in mV and not in Ohm/m ie. Resistance /m

[@shishiram]

This is easier method of calculation....for me at least ...as I'm using this...

[@rasakakv6872]

I, 5wire using 75 meater up than 3

[@gopalakrishnanjayaprakash6414]

വോൾട്ടേജ് കൂട്ടി ആന്പിയർ കുറച്ചു കഴിഞ്ഞാൽ റസിസറ്റൻസ് കുറയ്ക്കും.അങ്ങനെ വോൾട്ടേജ് ഡ്രോപ്പ് കുറയ്ക്കാം,കണ്ടക്ടറിൻെറ ഏരിയാ ഓഫ് ക്രോസെക്ഷൻ കുറയ്ക്കാം,അതുവഴി എക്കൊണൊമിക് ഫീസിബിലിറ്റി ഉണ്ടാകും.

[@afiafeef8841]

Ys thats it

[@shishiram]

Good..for full details and calculation... Stay subscribe with bell button pressed. If you liked the video, Like and share to family and friends..

[@mohammedroshan347]

വലിയ മോട്ടറിന്റെ ഒക്കെ സ്റ്റാർട്ടിങ് Ampire എങ്ങനെയാണ് Calculate ചെയ്യാ??

[@realdevbro447]

3 times rated amp.

[@binurajvijayan]

എന്റെ വീട്ടിൽ ഉള്ള എല്ലാ LED ലൈറ്റുകളും ഓൺ ആയിരിക്കുബോൾ ബ്ലിങ്ക് ചെയ്യുന്നു എന്തായിരിക്കും കാരണo (20watt,14watt,9watt,0.5watt) ഒരു മാസത്തോളമായിട്ട് ഇങ്ങനാ

[@pradipanp]

OFF ആയിട്ടിരിക്കുമ്പോൾ ആണോ?

[@kunhumuhammedkunhumuhammed1661]

@@pradipanp ശരിക്ക് നോക്കി വായിക്കൂ

[@rasakakv6872]

❤❤❤❤❤❤

[@MrShaneemibnshereef]

For a load of 300 watts. Single phase . The length is 1500 meter. Can you please advise the cable size suitable for this run. Pvc insulated cable.

[@shishiram]

Brother... take some effort... try to do calculation yourself... if you have any doubt in calculation ask me .... I will help for sure...

[@MrShaneemibnshereef]

@@shishiram VD=(Milli volt x Amp load x Length of cable) /1000 P=300 Watts A=300/(240x0.9)=1.4A Consider the wire size is 6mmsq where its Milli volt per ampere is 7.4 VD=(7.4x1.4x1500)/1000 =15.54 VD%= (15.54/240)x100=6.475% which is greater than 3%. So considering next stage of cable which is 10mmsq where its Milli volt per ampere is 4.3 VD=( 4.3x1.4x1500)/1000 =9.03 VD%=(9.03/240)x100=3.7 % which is nearer to 3 %. But not equal to 3 % So we consider the. Ext stage of cablw which is 16 mmsq. Where its Milli volt per ampere is 2.7 VD=( 2.7x1.4x1500)/1000 =5.67 VD%= (5.67/240)x100=2.3 %which is less than permissible voltage drop 3 %. So we will choose 16mm sq cable for the long run of 1500..meter length and the power 300 Watts.

[@MrShaneemibnshereef]

Is this calculation OK??

[@shihabkattoorpetta8912]

1500 wats 200 meter awich cable alluminum 2core

[@mubashirthottungal11]

വോൾടേജ് കുറവാണു ഫാൻ എല്ലാം സ്ലോ മെയിൻ ഓഫ്‌ ചെയ്ത് ഇൻവെർട്ടറില് നിന്ന് വർക്ക്‌ ചെയ്യുമ്പോൾ സ്പീഡ് ഉണ്ട് കാരണം എങ്ങനെ കണ്ട് പിടിക്കാം

[@hari3658]

main connection in voltage drop varunnath kond aanennu thonnunnu, pazhaya wiring aanenkil megger cheyth nokki cable insulation check cheyyunnath nannayrikkum

[@gopalakrishnanc.p4415]

Voltage is increasing,samtime current decrease

[@binutn5375]

100m lengthലുള്ള loadൽ2core cable ഉപയോഗിക്കുമ്പോൾ voltage drop 100m ആണോ200m ആണോ calculationനു വേണ്ടി ഉൾപ്പെടുത്തേണ്ടത്? Conductorന്റ നീളം 200mആണല്ലോ.

[@shishiram]

If your 2 core cable length is of 100 m then for calculation is for 100 m

[@hafathk9773]

Under water cable

[@shishiram]

OK... Flat cable used for submersible pump... For more details on cables watch this video... kzbin.info/www/bejne/eXikYn-dl5xkpNU Stay subscribed with bell button pressed.. If you find our video interesting , please like and share this video to friends and family...

[@jamsheerchanath677]

ഡിസി വയറിങ് സിസ്റ്റം സ്‌പ്ലൈൻ

[@usmanttml]

കാൽക്കുലേഷൻ മനസ്സിലാവുന്നില്ല

[@shishiram]

Sorry... please see once again....or check my facebook or insta page for all slides..

[@sacred_hope]

thanks

[@mohamedsafwan6198]

Thank you sir....

[@sathyanhari4089]

Super

[@shishiram]

Thanks ... Stay subscribe with bell button pressed. If you liked the video, Like and share to family and friends..