kVA zu Ampere Rechner
Wandeln Sie Scheinleistung in Strom um. Entscheidend für die Dimensionierung von Generatoren, Transformatoren und industriellen Verteilerschränken, deren Gesamtkapazität in kVA angegeben ist.
Verteilungsanalyse
Scheinleistung → Strom
Berechneter Strom pro Phase für Verteilerschränke.
Die Umrechnungsformel
Die Umrechnung von kVA in Ampere unterscheidet sich zwischen einphasigen und dreiphasigen Systemen.
Einphasiger Wechselstrom
I = (kVA × 1000) ÷ V kVA berücksichtigt bereits den Leistungsfaktor — keine PF-Eingabe erforderlich. Verwendet für USV-Systeme, Generatoren und einphasige Transformatoren.
Dreiphasiger Wechselstrom
I = (kVA × 1000) ÷ (√3 × V) Die dreiphasige Scheinleistung verwendet die Leiter-Leiter-Spannung mit dem Faktor √3 (1,732). Standard für Industriegeneratoren und -transformatoren.
How to Convert kVA to Amps
kVA (kilovolt-amperes) is a measure of apparent power — the total power a source must supply, including both real work and reactive power. Unlike kW which measures only real power, kVA is the rating used for generators, UPS systems, and transformers because these devices must supply whatever current is demanded regardless of the load's power factor.
kVA vs. kW: The Key Difference
kW = kVA × Power Factor. A 10 kVA generator powering a load with 0.8 PF delivers only 8 kW of real power. Always size generators and UPS units in kVA — the kW figure alone will lead to undersizing if your loads have poor power factors.
Where kVA Ratings Are Used
- Generators: All generator output capacity is rated in kVA. A 20 kVA generator at 0.8 PF produces 16 kW of real power.
- UPS Systems: Uninterruptible power supplies use kVA ratings. Match the kVA rating to your total load's apparent power, not just its watt draw.
- Transformers: Transformer capacity is always in kVA. The secondary current rating determines what wire gauge and protection you need.
- HVAC Equipment: Large commercial air conditioning units may publish kVA demand for electrical planning purposes.
Step-by-Step Conversion
- Find the kVA Rating: Read it from the generator, UPS, or transformer nameplate.
- Note the Output Voltage: Single-phase systems typically output 120V or 240V; three-phase at 208V, 240V, or 480V.
- Select the Phase Type: Use the single-phase or three-phase formula based on your system.
- Calculate: The result is the maximum continuous current the device can supply — use it to select cables and protection devices.