Three Phase Electric Power Equation

A three wire three phase circuit is usually more economical than an equivalent two wire.

Three phase electric power equation.

It is a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power. For a three phase circuit watts equal volts times amperes times the square root of 3. The three phase power calculator calculates the active and reactive power current from the following parameters. Three phase electric power is a common method of alternating current electric power generation transmission and distribution.

Understand the difference in how power consumption is calculated for conventional and three phase power circuits. Active or real or true power do the actual work in the load. In a conventional electric circuit power in watts is equal to the voltage multiplied by the amperage. For three phase power calculation we have to first consider an ideal situation where the three phase system is balanced.

A three phase system may be arranged in delta or star y also denoted as wye in some areas. Enter the power factor of the load. P u i cos φ u i pf 3a where. 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.

Active power is measured in watts w and is the power consumed by electrical resistance. 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. Electrical electrical units amps and electrical wiring wire gauge and awg electrical formulas and motors. Pf cos φ power factor.

For determination the expression of three phase power equation i e. Ac circuit voltage current and power in an ac circuit alternating current is generated from a sinusoidal. Enter the phase to phase v ll voltage for a 3 phase ac supply in volts. Ac active reactive and apparent power real imaginary and apparent power consumption in ac circuits.

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 the current in amperes a. Network analysis electrical circuits electrical network three phase power polyphase systems for examples of y and δ connections. A wye system allows the use of two different voltages from all three phases such as a 230 400 v system which.

φ phase angle between the electrical potential voltage and the current. Dividing 8 by 2 or 3 expressions for or gives the remaining equations. It is also used to power large motors and other heavy loads. P 3.