Calculadora de Potencia Trifásica
Calcula potencia activa, reactiva y aparente en sistemas eléctricos trifásicos equilibrados.
Fórmula
P = √3 × V_L × I × PF, S = √3 × V_L × I
Cómo Funciona
Three-phase power systems represent a fundamental method of electrical power transmission and distribution. In three-phase systems, power can be configured in two primary topologies: wye (star) and delta connections. The system involves three alternating current circuits, each 120 degrees out of phase with each other. Wye configurations feature a neutral point, while delta configurations do not. Power calculations involve understanding the relationships between line and phase voltages, line and phase currents, and power factor. The key parameters include line voltage (V_line), current (I), and power factor (PF), which together determine real power (P), reactive power (Q), and apparent power (S).
Ejemplo Resuelto
Consider a three-phase wye-connected system with line voltage of 480V, line current of 50A, and power factor of 0.85. First, calculate phase voltage: V_phase = V_line / √3 = 480 / 1.732 = 277V. Real power calculation: P = √3 * V_line * I * PF = 1.732 * 480 * 50 * 0.85 = 35.4 kW. Reactive power: Q = √3 * V_line * I * sin(arccos(PF)) = 1.732 * 480 * 50 * 0.527 = 22 kVAR. Apparent power: S = √3 * V_line * I = 1.732 * 480 * 50 = 41.6 kVA.
Consejos Prácticos
- ✓Always verify whether system is wye or delta before calculations
- ✓Use a scientific calculator with trigonometric functions
- ✓Double-check unit conversions
Errores Comunes
- ✗Confusing line and phase values without proper transformations
- ✗Neglecting power factor in calculations
- ✗Mixing wye and delta calculation methods
Preguntas Frecuentes
What's the difference between wye and delta connections?
Wye connections have a neutral point and different phase-to-neutral and phase-to-line voltages. Delta connections form a triangular configuration without a neutral point.
How does power factor affect calculations?
Power factor determines the ratio of real power to apparent power, indicating system efficiency and power quality.
Can I use the same formula for wye and delta systems?
No, calculation methods differ between wye and delta configurations due to different voltage and current relationships.
What units are typically used in three-phase power calculations?
Voltage in volts (V), current in amperes (A), power in kilowatts (kW), reactive power in kilovolt-amperes reactive (kVAR).
How accurate are three-phase power calculations?
Calculations are typically accurate within 1-2% when using precise instrument measurements and considering system tolerances.
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