Three Phase Electric Power Equation

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.

Three phase electric power equation.

For three phase power calculation we have to first consider an ideal situation where the three phase system is balanced. For a three phase circuit watts equal volts times amperes times the square root of 3. 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. The line to neutral phase voltage v ln 400 3 230 v three phase power is 36 kw single phase power 36 3 12 kw now simply follow the above single phase method.

Enter the the current in amperes a. Ac active reactive and apparent power real imaginary and apparent power consumption in ac circuits. P 3. For determination the expression of three phase power equation i e.

φ phase angle between the electrical potential voltage and the current. It is also used to power large motors and other heavy loads. In a conventional electric circuit power in watts is equal to the voltage multiplied by the amperage. A three phase system may be arranged in delta or star y also denoted as wye in some areas.

P u i cos φ u i pf 3a where. 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. Network analysis electrical circuits electrical network three phase power polyphase systems for examples of y and δ connections.

Electrical electrical units amps and electrical wiring wire gauge and awg electrical formulas and motors. A three wire three phase circuit is usually more economical than an equivalent two wire. Active or real or true power do the actual work in the load. Understand the difference in how power consumption is calculated for conventional and three phase power circuits.

Three phase electric power is a common method of alternating current electric power generation transmission and distribution. A wye system allows the use of two different voltages from all three phases such as a 230 400 v system which. Which is the equation for. It is a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power.

Ac circuit voltage current and power in an ac circuit alternating current is generated from a sinusoidal. Enter the power factor of the load. 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. Enter the phase to phase v ll voltage for a 3 phase ac supply in volts.