What is sin in reactive power?

An example of power calculations (see Fig. L3)

What is cosine of angle between voltage and current?

The Cosine of angle between Current and Voltage is called Power Factor. P = VI Cosθ OR. Cosθ = P / V I OR. Cosθ = kW / kVA OR. Cosθ = True Power/ Apparent Power.

What is sine in power factor?

This phase difference determines the Power Factor of the load. In a resistive type of load, the sine wave-form of the current drawn by the load has 0 degrees phase difference Ø with the sine wave-form of the voltage of the AC power source. The Power Factor of a resistive load is unity (1).

What is cos Electrical?

COS is the abbreviation of cosine. It refers to the Power Factor (PF) of the electric consumption.

Who generates reactive power?

Devices which store energy by virtue of a magnetic field produced by a flow of current are said to absorb reactive power; those which store energy by virtue of electric fields are said to generate reactive power. The flows of Reactive Power on the system will affect Voltage levels.

What is reactive power and active power?

Definition. Active power is the power that continuously flows from source to load in an electric circuit. Reactive power is the power that continuously flows from source to load and returns back to source in an electric circuit.

What is active and reactive power?

Active power is the power that continuously flows from source to load in an electric circuit. Reactive power is the power that continuously flows from source to load and returns back to source in an electric circuit. Reactive power is called as ‘Imaginary power’ or ‘Watt less power’ or ‘Useless power’ or Complex power.

Is Cos the same as power factor?

Because true power and apparent power form the adjacent and hypotenuse sides of a right triangle, respectively, the power factor ratio is also equal to the cosine of that phase angle.

What is cos on a motor?

Cos φ is the calculated power factor where φ is the phase angle between the voltage and current. It is indicated on the rating plate of the motor. The power factor cos φ is the ratio of the load’s real power to its apparent power, and is given by the equation.

How do you find the relation between active reactive and apparent power?

The relation between active, reactive and apparent power can be expressed by representing quantities as vectors, which is also called as power triangle method as shown below. In this phasor diagram voltage is considered as reference vector. The voltage & current phasor diagram is the basis for the formation of the power triangle.

What is the average of reactive power and real power?

So the average of this reactive power is zero. The average power P is called as Real Power. It is also sometimes called active power. It is usually written as P = VI cos φ. But it should be remembered that V and I are the rms values of voltage and current.

How do you calculate reactive power in an AC circuit?

In an AC circuit, if the applied voltage is ‘V’ and the circulating current is “I”, then the average value of active power is P = VI cos ϕ, where ϕ is the phase angle between current and voltage. The formula for reactive power is Q = VI sin ϕ, where “I sin ϕ” here represents the current is out of phase with the voltage.

How to find active power and reactive power from voltage vector?

Where α and β are angles that voltage vector and current vector subtend with respect to some reference axis respectively. The active power and reactive power can be calculated by finding the product of voltage to conjugate of current.That means,