Qabul qilinadigan kuchlanish tushishi qancha?

Ko'pgina elektr kodlari tarmoq zanjirlar uchun maksimal 3% kuchlanish tushishini va jami (feeder + tarmoq) 5% ni tavsiya qiladi. IEC 60364 va NEC ham ushbu chegaralarni taklif qiladi. Motor zanjirlari uchun ortiqcha kuchlanish tushishi ishga tushirish momentini V² ga mutanosib ravishda kamaytiradi.

Kuchlanish tushishi qanday hisoblanadi?

For single-phase: ΔV = 2 × ρ × I × L / A. For three-phase: ΔV = √3 × ρ × I × L / A. Where ρ is resistivity (Ω·mm²/m), I is current (A), L is one-way cable length (m), and A is conductor cross-section (mm²).

Mis va alyuminiyning solishtirma qarshiligi qancha?

Copper resistivity at 20°C: 0.0175 Ω·mm²/m (1.72×10⁻⁸ Ω·m). Aluminum: 0.0283 Ω·mm²/m (2.83×10⁻⁸ Ω·m). Aluminum is about 61% the conductivity of copper, so larger cross-section is needed.

Kabel harorati kuchlanish tushishiga ta'sir qiladimi?

Yes. Conductor resistance increases with temperature. At 75°C operating temperature, copper resistivity is about 0.0216 Ω·mm²/m (vs 0.0175 at 20°C). This calculator uses room temperature values; for hot cables, increase by ~20%.

Kuchlanish tushishini qanday kamaytirish mumkin?

Variantlar: (1) Kabel kesimini oshirish, (2) Kabel uzunligini kamaytirish (taqsimot щitini ko'chirish), (3) Ta'minot kuchlanishini oshirish (masalan, 400V o'rniga 690V), (4) Alyuminiy o'rniga mis ishlatish, (5) Tokni kamaytirish uchun quvvat koeffitsientini tuzatish.

Muhandislik uchun bepul vosita

Kuchlanish Tushishi Kalkulyatori

Calculate cable voltage drop for single-phase and three-phase circuits. ΔV = k × ρ × I × L / A. Shows absolute drop and percentage.

1-fazali / 3-fazali Cu / Al IEC 60364

System Type

Supply Voltage (V)

Load Current (A)

Kabel uzunligi (bir yo'nalish) (m)

O'tkazgich kesimi (mm²)

O'tkazgich materiali

Quick presets

Results

Voltage Drop

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Foizli tushish

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Yuklama ostidagi kuchlanish

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Kabel qarshiligi

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Kabelda quvvat yo'qotilishi

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Kuchlanish tushishi formulalari

k = bir fazali/DC uchun 2, uch fazali uchun √3
ρ = resistivity (Ω·mm²/m) — Cu: 0.0175, Al: 0.0283
I = current (A), L = bir tomonlama uzunlik (m), A = kesim maydoni (mm²)

💡 Tip: IEC 60364 va NEC tavsiyalariga muvofiq, tarmoq zanjirlari uchun kuchlanish tushishini 3% dan, umumiy tushishni (magistral + tarmoq) 5% dan oshirmaslik kerak.

Kuchlanish Tushishi Kalkulyatori | Bepul Kabel O'lchamlash Vositasi | Vibromera

Published by Nikolai Shelkovenko on Fevral 15, 2026 Mart 5, 2026

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Kuchlanish tushishi formulalari

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