Voltios a Amperios Calculadora
Comprenda la relación entre voltaje y corriente. Calcule con precisión cuántos amperios resultarán de un voltaje y una carga de potencia determinados.
Análisis de Corriente
Voltaje + Potencia → Amperios
El flujo de corriente resultante que se producirá en el circuito.
La Fórmula de Conversión
El cálculo de corriente cambia según si su circuito es CC o CA, y según el factor de potencia en sistemas de CA.
Sistemas de CC
I = (kW × 1000) ÷ V La corriente continua no tiene ángulo de fase: la corriente es simplemente la potencia dividida por el voltaje.
CA Monofásica
I = (kW × 1000) ÷ (V × PF) El factor de potencia reduce la potencia efectiva en los circuitos de CA. Un FP de 0.9 significa que se consume un 10% más de corriente de lo que sugiere la potencia real.
CA Trifásica
I = (kW × 1000) ÷ (√3 × V × PF) La energía trifásica se distribuye entre tres conductores; el factor √3 (1,732) tiene en cuenta la relación de fase entre ellos.
How to Convert Volts to Amps
Converting voltage to current requires knowing the power being consumed or the resistance in the circuit. When you know power (in kW or W), Ohm's Law and the power formula give you current directly. This calculation is essential for sizing circuit breakers, fuses, wire gauges, and selecting protective equipment.
Why Voltage and Current Move in Opposite Directions
For a fixed load, doubling the voltage halves the current. This inverse relationship is why high-voltage transmission lines carry massive power across long distances using thin cables — lower current means less resistive heating and power loss in the wire.
Practical Applications
- Circuit Breaker Sizing: A 2kW heater on 240V single-phase draws about 8.7A at unity PF — you'd protect it with a 10A or 15A breaker.
- Wire Gauge Selection: Higher current requires thicker wire to stay within safe temperature limits. Use the NEC or IEC ampacity tables after calculating current.
- Fuse Selection: Fuses must be rated at 125% of continuous load current. Calculate first, then select the fuse size.
- Motor Nameplate Verification: Cross-check the listed FLA (Full Load Amps) against the calculated current from rated HP and voltage.
Step-by-Step Conversion
- Note the Power: Find the kW or watt rating on the equipment label.
- Read the Voltage: Confirm the system voltage — check the supply panel or equipment nameplate.
- Identify AC or DC: DC circuits use the simple formula; AC circuits need the power factor applied.
- Calculate and Size Up: Always round up to the next standard breaker or fuse size after calculating.