Three Phase Electric Power Equation

The most important three phase power equations relate power p in watts to current i in amps and depend on the voltage v there is also a power factor pf in the equation that takes account for the difference between the real power which performs useful work and the apparent power which is supplied to the circuit most types of three phase power calculations are performed.

Three phase electric power equation.

Ac active reactive and apparent power real imaginary and apparent power consumption in ac circuits. P u i cos φ u i pf 3a where. Ac circuit voltage current and power in an ac circuit alternating current is generated from a sinusoidal. A three phase system may be arranged in delta or star y also denoted as wye in some areas.

Understand the difference in how power consumption is calculated for conventional and three phase power circuits. P 3. In electrical engineering three phase electric power systems have at least three conductors carrying alternating current voltages that are offset in time by one third of the period. That means voltage and currents in each phase differ from their adjacent phase by 120 o as well as the amplitude of each current wave is same and similarly.

As an example consider a balanced three phase load consuming 36 kw at a power factor of 0 86 and line to line voltage of 400 v v ll. Enter the phase to phase v ll voltage for a 3 phase ac supply in volts. It is also used to power large motors and other heavy loads. A wye system allows the use of two different voltages from all three phases such as a 230 400 v system which.

In a conventional electric circuit power in watts is equal to the voltage multiplied by the amperage. A three wire three phase circuit is usually more economical than an equivalent two wire. φ phase angle between the electrical potential voltage and the current. Which is the equation for.

The three phase power calculator calculates the active and reactive power current from the following parameters. Dividing 8 by 2 or 3 expressions for or gives the remaining equations. Active power is measured in watts w and is the power consumed by electrical resistance. Pf cos φ power factor.

Enter the the current in amperes a. Enter the power factor of the load. For a three phase circuit watts equal volts times amperes times the square root of 3. For determination the expression of three phase power equation i e.

Electrical electrical units amps and electrical wiring wire gauge and awg electrical formulas and motors. Three phase electric power is a common method of alternating current electric power generation transmission and distribution. Network analysis electrical circuits electrical network three phase power polyphase systems for examples of y and δ connections. For three phase power calculation we have to first consider an ideal situation where the three phase system is balanced.