How much power does a capacitor 8KVar consume in an hour?

kvar reactive power in kilovolt amperes. Reactive power refers to the part of energy that can be converted between the electric field energy and the magnetic field energy. The reactive power of a capacitor is related to voltage and frequency, which can be calculated by the electric power and ohmic formulas:

xc=1/(2πfc)；s=U 2 xc If it is a 50 Hz 380V circuit, the capacitance method is required If it is a 50 Hz 220V circuit, the capacitance method is calculated The capacitance sensor is not a general capacitance, but a capacitance that changes with the detected amount.

The capacitor does not consume power in the DC state. Even the power consumption of the capacitive signal is negligible. Rated power = rated voltage * rated current.

220V* means working at rated power for 1 hour, consuming electricity, that is, kilowatt-hour of electricity.

But the way the refrigerator works is not continuous but intermittent and does not work all the time.

The nameplate indicates the hourly power consumption of appliances with a daily consumption of 900W. According to the title, the electricity power of the electrical appliance is 900W, that is, according to the formula: electricity consumption = electricity consumption * electricity consumption duration, then the electricity consumption per hour is: , that is, kilowatt hours. Kilowatt-hour is what is usually called "degree", which is the unit of electric work, symbol: kw·h, and the calculation formula is power multiplied by time.

Suppose the power of a power-hungry device is 2500 watts, that is, its power consumption in one hour is kilowatt-hours, which is one hour of electricity. Then kWh = degrees. So 900W appliances consume electricity per hour.

Extended Information: Electrical Power Related Formulas Electrical work (w) is the same as the unit of electrical energy, and the international unit is joules (j) The formula for electrical power: p=w t (t in the formula represents time, and the basic unit is seconds-s, which is also constant.)

The capacitor is to compensate for reactive power, 8kvar refers to reactive power, if you have to know active work, you need to know the tangent angle, which is generally very small.

In AC circuits, there are three main states of power of pure capacitor circuits, namely instantaneous power, active power, and reactive power.

Power in a pure capacitive circuit.

Instantaneous power. The instantaneous power is equal to the product of the voltage UC and the circuit IC (that is, the voltage at both ends of the capacitor at any time multiplied by the current flowing, and the electric power calculation formula: U·i=P), and its change law is shown in the following figure

Active power. As you can see from the graph on the right, the instantaneous power alternates twice in a cycle, two times positive and twice negative. This indicates that the instantaneous power has an average power value of zero over a cycle.

It shows that in a pure capacitor circuit, only the capacitor exchanges energy with the power supply, and there is no energy consumption, so the active power is zero. It is similar to an inductive element and is an energy storage element.

Reactive power. The maximum value of instantaneous power in a pure capacitor circuit is called reactive power, which indicates the scale of energy exchange between the capacitor and the power supply, and is expressed in QC.

qc= ic uc= i2c xc

In the above formula:

QC: Indicates the reactive power var or kvar (unit of reactive power in kilovolt-amperes) of the capacitor

UC: Indicates the RMS value (V) of the voltage between the two poles of the capacitor

ic: Indicates the effective current value (A) in a pure capacitor circuit

xc: Represents the capacitor.