Voltage Drop Calculation. What is Voltage drop? (Tutorial - Tagalog) Engr. Noel
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- เผยแพร่เมื่อ 7 ก.ย. 2024
- Sa mga electrical practitioners. Sana makatulong sa inyo itong tutorial natin about voltage drop. Ito ay para magamit nyo sa trabaho, refresher sa mga nakalimot na at dadag kaalaman para sa mga fresh/cadet engineer na nagtatrabaho bilang designer at project engineer.
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Additional info. mga boss, hindi ko nabanggit sa video ung pag size ng feeder cable.
Feeder Cable Sizing
NEC 2017 Edition, Article 215.2, Minimum Rating and Size (A)
Feeders Not More Than 600 Volts (1) General (a), page 70-67.
“Where a feeder supplies a continuous loads or any combination of continuous and non-continuous loads, the minimum conductor feeder size shall have an allowable ampacity not less than the non - continuous loads plus 125 percent of the continuous load”.
Below is the link for Saudi cable catalogue,
www.saudicable....
Thank you sir sa malinaw na explanation at may mga kasama pang reference . God bless more power !
salamat sa malinaw na explanation!! Request po ng SC sa next
Thanks for this resourceful VD calculations..
salamat.. nakakatulong po kayo sa thesis ko pagdating sa pagkuha ng VD .. sana meron din sa SC Analysis tutorial sa PowerWorld kasi simulation ko tapos need computations para sa papers.
Thank you po sir tutorial na to
slamat po ng marami po
thanks for sharing your God given talent Engr..
Salamat po Engr.Laude
Nice boss.. very clear
Thank you sir
hi... sir in your video 10:39 mnt. there is one mistake .here S=√3 I FL X V
NOT VA because VA is rating voltage amp.
May I suggest that when calculating the voltage drop can we consider the highest possible ambient temperature(hottest) which example is 50 deg. centigrade in that effect we will convert the resistance and reactance value given in the cable catalogue base on new temp.(50 deg. centigrade) in order to check the voltage drop in the worse case scenario. Thank you
When you always considered the highest ambient temperature, the size of the cable will be larger. Yes it's safer, but it will have an effect on the initial cost of the project.
In design, which is most you must have to consider..safety or economy?
Im Mechanical engineer, but i also eager to learn Electrical system
Boss ang short circuit calculation naman po boss
lodi
Great presentation. How about the effect of voltage drop brought about by the transformer?
boss, suggestion pong solusyon sa voltage drop pag unang start ng waterpump o washing machine, seconds lang mag drop na nonormalize naman after. salamat.
Ty po sa video sir. Pano naman po kung 3km max po yung distance from 3phase supply?
Paki explain po kung ano effect voltage rise sa iduction motor
Boss baka meron ka guide for short circuit calculation. Residential and commercial. Thanks
Cge boss boss gawan ko Rin un.. cnumulan ko p lng kc sa basics.. later on mag upload din ako hangang short circuits and arc flash
Thank you boss. Maraming Salamat.
Bossing baka pwdi po manghingi sayu Ng reference.salamat po sir sa pag disscuss Ng voltage dropped computation maraming po salamat po. (lonzagapalao@gmail.com)
good afternoon sir sa lahat naba yan Bali Yung length nalang Yung babaguhin Kasi kung halimbawa 1.1k meters Yun nalang babaguhin sa L na 1100 meters salamat?
Ok to boss
Sir pwedi po ba matanong kung paano to nakuha kase ilan beses ko na kinumpute di ko pa rin po makuha .
72.36A
ser magandang gabi po pano pons mag compute ng elevator motor for resestance po
❤👍
Hindi ba sir ang theta is inverse tangent ng ratio of X/R of cable?
Sir s transformer pano MG calculate NG vd
Morning engr pano Po mag compute Ng kaic sa breaker salamat po
Sir, mayroon ka file ng Saudi Cable Catalougue?
sir, ung formula na to pwede din ba gamitin to calculate voltage drop sa medium voltage system?...Thanks
sana ma sagot
boss sana mapansin
paano po boss kung nsa 1km ang layo end to end na street light tas ang gamit ay 12awg tas ang breaker ko ay 25A at Ilaw ko ay 25 pcs na 15W
ilan kaya voltage nyan sir? at pde kya yan?
engr. sa po ung basehan qng san nkuha ung correction factor base on installation and temperature K1 and K2
Ung s sample computation kinuha ko sya s cable catalogue n approved s project. Ung mga de-rating factor s catalogue, extracted Naman un s IEC standards.
@@NoelLaude salamat engr
Boss pwede bang maglagay ng step up transformer sa dulo pra ma compensate ang voltage drop? Para makatipid sa size ng wire.. 450 m distance.. 23amps ang load.. 3phase..230 volts
Pwede naman.kaso tingin ko mas magastos
Sir kapag 1ph DC ang system, consider p dn ba ang reactance ng cable?
sir pwede po humingi ng excel file ng voltage drop for 3 phase
Ano pong gawin kung 80 meters ang layo wire ang gagamit ay 3hp submersible pump?
Same procedure lng po. Dapat talaga may voltage drop calculation n yn..kc medyo malayo n
Boss ang office namin 3phase line to line 240v. Ang nang yari nag test ako line 1 to ground 115v, line2 to ground 115v, ang problema line3 to ground is 200v. Pa help naman tnx.
Possible cause nyan is Hindi balance ung loading Ng panel n nagsusupply sa office nyo. Db as much as possible pag gumawa tyo Ng load schedule kailangan almost equal ung loads nya per phase. Maaring maraming loads sa line 3 nyo
What to do if your percent voltage drop is greater than 5% engr? What technical way to solve it? Thank you sir Engr.
Try to understand the presentation sir, the solution is very well explained.
You can increase the size of wire or increase the number of sets
Hi po ask ko lang po kung kelan po gagamitin ang derating factor?
Lagi pong kinoconsider s calculation ng vd po un.
paano po sir if xlpe na lang gagamitin namin instead of 7 sets 300mmsq thhn based sa computed 525.75 amp. 230vac, 3ph,60hz po. magging ilang sets po kaya xlpe ito na 50 or 70 mmsq po. thanks
670meters po layo sir
Isang linya lng un o total Ng seven sets? Ang Dami nyan pag niliitan m p size.mas maganda p nga Dyan Kung gawin mong 630mm sq.
@@NoelLaude poultry po application sir kaya malayo sya. 670 distance sa power house sir ( 12 poultry house and i feed from power house po. parang 7 sets po if THHN 325mmsq gagamitin sir voltage drop pumasok po. Di ko pa natry mag XLPE .6/1KV CABLE po. mas mababawasan po sana sets cables po.
Sir may y table ka ba ng pag kuha mo sa k1 and k2? Anu po basihan niyo bakit. 94 and. 79? Salamat sa pag sagot sir
Ginagamit po un sa pagkuha/pag compute Ng de-rated ampacity ng cable. Ung k1, k2 po is ung correction factor base s ambient temperature at grouping Ng pagkakainstalled Ng cable.
Salamat sa explain sir. Meron po ba sa pec ung table kung saan makikita ung 0.94 etc? Pag meron sir pwede po pa send. Salamat
Iba sir ung table sa pec natin.. Ang ambient temperature nun is 30°C at 40°C.. ung pinakita ko s sample calculation is base sa 45°C kc dito po s Saudi yng project
Pano pag ung computed na %VD is nag exceed sa required nh code. Anong pwede pong gawin
Resize the cable or increase the number of cable per phase. Tpos recalculate lng boss
@@NoelLaude ty sir. Last question po.
Example 38mmsq thhn ang recommended na wire para mameet ang required ng code. Pano po un ikakasa ung malaking wire sa 60 amps mccb? Lugs with extended busbar po ba ang solution? Ty sir ng marami
Kung d kasya ung round n lugs, hanap k muna n lugs n straight ung dulo ng connection. Merong ganong type Ng lugs. Mapapamahal kp Kung magextend k Ng busbar.
@@NoelLaude thank you very much sir.
Sir anong table number sa PEC na naka indicate ang resistance at reactance (ohms per meter)? Salamat
Hindi ko rin makita boss sa PEC.
thanks may natutunan ako tanong ko lng kung pwede bkit pec standard tapos saudi cable ang ginamit
@@naso3x ung sample kc boss n binigay ko is ung project ko mismo. Ung pec kc halos the same lng ng nec.kaya nagbigay ako ng article number ng nec at pec para d maligaw ung manonood.
Mas magandang gamitin sa calculation kung ano ung approved cable data.
@@NoelLaude pano sir pag PEC gagamitin ilan yung powerfactor
@@nixau6637 as per explanation ni sir Noel, sa utility manggagaling ung power factor, so you need to inquire or ask someone, for example sa meralco
Sir paano po pag 3 sets din sa pec? Itimes 3 po yung 305? Maraming salamat sa sagot po
Kung 3sets boss, Tama multiply mo sa 3 ung ampacity ng cable. Kung 305 ung ampacity ng cable,so magiging 915 amp n ung total ampacity
Pero usually pag nag multi sets tyo Ng cable pag malalaki loads n. Para d masyadong mahirap sa installations.
im sorry sir,
sir pwedi bang malaman kung paano kinuha ang length?
please sir
Sa estimated cable length n po un sir. Point to point
we did not understand at least in English