Je, ni voltage drop ipi inayokubalika?

Kanuni nyingi za umeme zinependekeza voltage drop ya juu zaidi ya 3% kwa mizani ya matawi na 5% jumla (feeder + matawi). IEC 60364 na NEC wote vinapendekezapishi. Kwa mizani ya motors, voltage drop kupita kiasi kupunguza torque ya kuanza kulingana na V².

Voltage drop inahesabiwaje?

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).

Ni upinzani gani wa umeme wa shaba dhidi ya alumini?

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.

Je, joto la kebo huathiri voltage drop?

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%.

Ninaweza kupunguza voltage drop vipi?

Chaguo: (1) Ongeza sehemu ya kebo, (2) Punguza urefu wa kebo (badilisha paneli ya mgawanyiko), (3) Ongeza voltage ya usambazaji (mfano 690V badala ya 400V), (4) Tumia shaba badala ya alumini, (5) Tumia marekebisho ya sababu ya nguvu kupunguza mkondo.

Zana ya Uhandisi Isiyolipisha

Kikokotoo cha Kushuka kwa Voltage

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

Awamu 1 / Awamu 3 Cu / Al IEC 60364

System Type

Supply Voltage (V)

Load Current (A)

Urefu wa Kebo (upande mmoja) (m)

Sehemu ya Msalaba wa Kondakta (mm²)

Nyenzo ya Kondakta

Quick presets

Results

Voltage Drop

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Asilimia ya Kushuka

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Voltage katika Mzigo

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Upinzani wa Kebo

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Upotezaji wa Nguvu katika Kebo

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Mifumo ya Kushuka kwa Voltage

k = 2 kwa sehemu moja/DC, √3 kwa sehemu tatu
ρ = resistivity (Ω·mm²/m) — Cu: 0.0175, Al: 0.0283
I = current (A), L = urefu wa upande mmoja (m), A = sehemu ya msalaba (mm²)

💡 Tip: Jika kushuka kwa voltage chini ya 3% kwa sehemu za matawi na 5% jumla (feeder + matawi) kulingana na IEC 60364 na mapendekezo ya NEC.

Calculeta ya Voltage Drop | Zana ya Kukamatia Kebo Bure | Vibromera

Published by Nikolai Shelkovenko on Febuari 15, 2026 Machi 5, 2026

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Mifumo ya Kushuka kwa Voltage

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