kW till Volt Kalkylator
Bestäm den nödvändiga spänningsnivån när du känner till effektförbrukningen och det maximala strömflödet. Avgörande för distributionsplanering och transformatorinställning.
Spänningsupptäckt
Effekt + Ström → Spänning
Potentialskillnad som krävs för att leverera målets effekt.
Omvandlingsformeln
Spänningsberäkningen beror på kretstyp — fasen och effektfaktorn förändrar beräkningen avsevärt.
DC-system
V = (kW × 1000) ÷ I Enkel effekt delat med ström. Används för batteribankar, solpaneler och DC-kretsar.
1-fas AC
V = (kW × 1000) ÷ (I × PF) Bostads- och lätt kommersiell standard. Effektfaktorn tar hänsyn till reaktiva laster som motorer.
3-fas AC
V = (kW × 1000) ÷ (√3 × I × PF) Industristandard. Faktorn √3 (1,732) krävs för alla trefasiga fas-till-fas-spänningsberäkningar.
How to Convert kW to Volts
Calculating voltage from power and current is a fundamental electrical task — useful when verifying system design, checking nameplate data, or troubleshooting circuits. Because voltage, current, and power are linked by Ohm's Law and power equations, you need to know both the power in kilowatts and the current in amps to solve for voltage.
Key Takeaway
Higher voltage at the same power means less current flows. This is why transmission lines run at hundreds of thousands of volts — thin wires can carry enormous power with minimal resistive loss when current is kept low.
Step-by-Step Conversion Guide
- Identify the Power: Read the kW rating from your device or system specification sheet.
- Find the Current: Locate the ampere rating on the equipment nameplate or measure it with a clamp meter.
- Determine Circuit Type: Is it DC, single-phase AC (residential), or three-phase AC (industrial)?
- Apply the Power Factor: For AC circuits, locate the power factor (PF) on the nameplate — typically 0.8–0.95 for motors and 1.0 for purely resistive loads.
- Calculate: Divide (kW × 1000) by the appropriate denominator based on your circuit type.
Common System Voltages
- 12V / 24V / 48V: DC systems — automotive, solar, telecom, and battery storage.
- 120V / 240V: North American residential single-phase AC (split-phase).
- 208V / 480V: US commercial and industrial three-phase AC.
- 230V / 400V: European and international single-phase and three-phase standards.