Kabel kesimi o'lchamini qanday hisoblash mumkin?

Cable cross-section is calculated using A = (k × ρ × I × L) / V_drop, where k is a system factor (2 for single-phase/DC, √3 for three-phase), ρ is conductor resistivity, I is current in amps, L is one-way cable length in meters, and V_drop is the allowable voltage drop in volts.

Kabel o'lchamini tanlashda kuchlanish tushishi nima uchun muhim?

Ortiqcha kuchlanish tushishi uskunaga nominal kuchlanishdan kam kuchlanish kelishiga olib keladi, bu esa yomon ishlash, motorlarning qizib ketishi, chiroqlarning xira bo'lishi va uskunaning shikastlanishiga sabab bo'ladi. Ko'pgina standartlar kuchlanish tushishini ta'minot kuchlanishining 3-5% i bilan cheklashni tavsiya etadi.

Mis va alyuminiy kabellar o'rtasidagi farq nima?

Copper has lower resistivity (0.0175 Ω·mm²/m) than aluminum (0.0283 Ω·mm²/m), meaning copper cables can carry the same current with a smaller cross-section. However, aluminum is lighter and cheaper. Aluminum requires about 1.6× the cross-section of copper for the same current capacity.

Standart kabel o'lchamlari qanday?

IEC 60228 bo'yicha standart kabel kesimlari: 0,75; 1,0; 1,5; 2,5; 4; 6; 10; 16; 25; 35; 50; 70; 95; 120; 150; 185; 240 va 300 mm². Hisoblangan kesim har doim keyingi standart o'lchamga yuqoriga yaxlitlanishi kerak.

AWG ni mm² ga qanday o'tkazish mumkin?

Common conversions: 14 AWG ≈ 2.08 mm², 12 AWG ≈ 3.31 mm², 10 AWG ≈ 5.26 mm², 8 AWG ≈ 8.37 mm², 6 AWG ≈ 13.3 mm², 4 AWG ≈ 21.2 mm², 2 AWG ≈ 33.6 mm², 1/0 AWG ≈ 53.5 mm², 4/0 AWG ≈ 107 mm².

Muhandislik uchun bepul vosita

Kabel Kesimi Kalkulyatori

Tok kuchi, kabel uzunligi, kuchlanish va ruxsat etilgan kuchlanish tushishi asosida to'g'ri sim o'lchamini (mm²) aniqlang. Eng yaqin standart IEC o'lchamiga avtomatik ravishda yuqoriga yaxlitlang.

IEC 60228 Cu & Al mm² & AWG

Current (A)

Cable Length (m, one-way)

Voltage (V)

System Type

Maksimal kuchlanish tushishi (%)

O'tkazgich materiali

Quick presets

Results

Talab qilinadigan standart kabel kesimi

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Hisoblangan ko'ndalang kesim (aniq)

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Haqiqiy kuchlanish tushishi (standart kesim)

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Kuchlanish tushishi foizi

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AWG Equivalent

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Kabel ko'ndalang kesimi formulasi

Ruxsat etilgan kuchlanish tushishi doirasida qolish uchun minimal talab etiladigan o'tkazgich ko'ndalang kesimi:

k — tizim omili: bir fazali AC va DC uchun 2, uch fazali AC uchun √3
ρ — resistivity of conductor (Ω·mm²/m): Cu = 0.0175, Al = 0.0283
I — current (A)
L — bir tomonlama kabel uzunligi (m)
V_drop — ruxsat etilgan kuchlanish tushishi (V)

Ruxsat etilgan kuchlanish tushishi

Haqiqiy kuchlanish tushishi

Standart kabel kesimi A tanlangandan so'ng_std is selected:

Standart kabel kesimlari (IEC 60228)

mm²	AWG (approx.)	mm²	AWG (approx.)
0.75	18 AWG	25	4 AWG
1.0	17 AWG	35	2 AWG
1.5	15 AWG	50	1/0 AWG
2.5	13 AWG	70	2/0 AWG
4	11 AWG	95	3/0 AWG
6	9 AWG	120	4/0 AWG
10	7 AWG	150	300 MCM
16	5 AWG	185	350 MCM

Amaliy Misol

Misol — Bir fazali 230V zanjir

Given: I = 10 A, L = 30 m, V = 230 V, max drop = 3%, copper

V_{drop(allowed)} = 230 × 3/100 = 6.9 V

A = 2 × 0.0175 × 10 × 30 / 6.9 = 1.52 mm²

Standard size: 2.5 mm² (rounded up)

Actual V_drop = 2 × 0.0175 × 10 × 30 / 2.5 = 4.2 V = 1.83%

⚠️ Note: Ushbu kalkulyator kabel kesimini faqat kuchlanish tushishi asosida hisoblaydi. Tanlangan kabel kesimi mahalliy elektr normalari (masalan, IEC 60364, NEC) bo'yicha ruxsat etilgan tok o'tkazish qobiliyati (ampacity) talablariga ham javob berishini har doim tekshiring.