EngiRef / Electrical Engineering Formula
Three-Phase Power
Three-Phase Power: Total power in three-phase system. An AC Circuits formula in electrical engineering. Variables P, Vₗ, Iₗ and φ, each with SI and imperial…
AC Circuits
Specification
- Name
- Three-Phase Power
- Discipline
- electrical
- Category
- AC Circuits
- LaTeX
- P = \sqrt{3} V_L I_L \cos(\phi)
- Description
- Total power in three-phase system
- Conditions
- Balanced three-phase system
- Can solve for
- P, Vₗ, Iₗ
- Tags
- three-phase, power, line, voltage, current
Variables
| Symbol | Name | Unit | Si Unit |
|---|---|---|---|
| P | Total Power | W | W |
| Vₗ | Line Voltage | V | V |
| Iₗ | Line Current | A | A |
| φ | Phase Angle | ° | rad |
Common questions
- What is the Three-Phase Power formula?
- Total power in three-phase system. It sits under AC Circuits, Electrical engineering in the EngiRef reference.
- What do the symbols in the Three-Phase Power formula mean?
- In Three-Phase Power, P is total power in W; Vₗ is line voltage in V; Iₗ is line current in A; φ is phase angle in °.
- When does the Three-Phase Power formula apply?
- Three-Phase Power holds under this condition: Balanced three-phase system.