Hesabu ya Maji Moto Yapungua
Makadirio ya kwamba nguvu za umeme zilizopotea kwenye waya zina urefu, mkondo na ukubwa wa kiongozi.
Matokeo yanakuwa bora zaidi unapochapa.
Kuhusu kifaa hiki cha kupigia hesabu
Every conductor has some resistance, so a little voltage is always lost pushing current along a cable — that loss is the voltage drop. For a single-phase run the drop is Vdrop = 2 × ρ × L × I / A, where the factor 2 accounts for the current travelling out to the load and back along the return conductor; a three-phase run uses √3 instead of 2. Here ρ is the resistivity of the metal (copper ≈ 0.0175 Ω·mm²/m, aluminium ≈ 0.0282 Ω·mm²/m), L is the one-way length in metres, I the load current in amps and A the conductor cross-section in mm². This calculator also reports the resulting percentage drop, the voltage actually delivered at the load and the power wasted as heat in the cable (Ploss = Vdrop × I).
As a worked example, take 20 A flowing 50 m one-way through a 10 mm² copper cable on a 230 V single-phase supply: Vdrop = 2 × 0.0175 × 50 × 20 / 10 = 3.5 V, about 1.5%, so the load sees roughly 226.5 V and the cable wastes 3.5 × 20 = 70 W. Switch the conductor to aluminium and the same run drops about 5.6 V, because aluminium’s resistivity is around 60% higher. You can either type a custom cross-section or pick a standard AWG gauge from the advanced list, which overrides the area field with the gauge’s real mm² value.
Voltage drop matters because motors, lights and electronics misbehave when they are starved of voltage — dim lamps, sluggish motors and nuisance tripping all trace back to oversized drops on long runs. Electricians size cables so total drop stays within about 3% for branch circuits and 5% end-to-end; the result here flags whether your run meets the limit you set, and the fix for a failing run is a larger conductor, a shorter route or, occasionally, a higher supply voltage.
Maswali yaliyoulizwa mara nyingi
Asilimia 50 ya umeme hupunguaje?
Kwa ajili ya mseja, Vdroe = 2 ▿ ▿ L ngumu / A. Sababu 2 inachangia kusafiri nje na nyuma; matatu-phase hutumia faida za faida badala ya 2.
Ni tone gani la nguvu likubalikalo?
Kawaida ya kawaida ya kidole gumba ni kupunguza jumla ya asilimia 3 kwa mizunguko ya tawi na asilimia 5 kwa ujumla.
Shaba au aluminium bustaninium ni muhimu?
Ndiyo. Aluminium ina asilimia 60 hivi ya juu zaidi ya ukinzaji kuliko shaba, kwa hiyo aluminium inamaniti nyingi zaidi ya ile ile.
Kwa nini mchanganyiko huo hutumia urefu mara mbili?
Sasa ni lazima tufike kwenye mzigo na kurudi, kwa hiyo mzunguko mmoja wa sheria unaona kushuka kwa viongozi wote wawili toka kwa sababu ya urefu wa mizunguko miwili. Nane-phase hutumia [1] badala yake, ikionyesha muundo wa nguvu tatu.
Ninapunguzaje kiasi cha nguvu za umeme kinachopungua?
Tumia mwongozaji mkubwa (kwa kukadiria mshuko wa maji) kupunguza nusu ya tone la mto), kufupisha mbio, kugawanya mzigo kuvuka nyaya sambamba, au kuinua umeme.
Kebo hiyo ina umeme kiasi gani?
Nguvu zilizopotea ni kupungua kwa kiasi cha umeme mara ambazo unatumia umeme, Ploss = Vdrodrot ngumu 1. V huanguka saa 20 za A kwa moto katika waya ambao unalipia lakini hautumii, ndiyo sababu mkondo wa juu wa maji hupitisha unene, wa chini wa nyaya.
Je, ninaweza kutumia geji za AWG badala ya eneo la milimeta 2?
Naam. Chagua kifaa cha kupima saa katika orodha ya juu ya AWG na kinashinda eneo hilo kwa kutumia kipimo hicho cha kupimia kinachoitwa 5,02 (e.g. 10 AWG ÉmILI 5.26 microp2), ili uweze kufanya kazi katika mfumo wa kupima mawimbi wa Amerika Kaskazini.
API bustanini hutumia kifaa hiki cha hesabu kutoka kwenye mfumo wa sheria
Ipigie simu kifaa hiki cha kupigia hesabu kama Junse É not doot toder. Chochote unachoacha kinatumia kiwango kilekile cha mwisho ambacho ukurasa huu haujakamilika; parameta isiyojulikana ni 400, si sufuri kimya kamwe. Soma habari kamili za API docs →
keyboard label
GET https://calculator.free/api/v1/voltage-drop/curl
curl "https://calculator.free/api/v1/voltage-drop/?material=copper&length=50¤t=20&area=10&source=230"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/voltage-drop/?" + new URLSearchParams({
"material": "copper",
"length": "50",
"current": "20",
"area": "10",
"source": "230"
}));
const data = await r.json();
console.log(data.results);Matokeo ni makadirio ya mwongozo wa ujumla, si wa kifedha, wa kitiba au wa kodi tu.