In alternating current circuits, energy storage elements such as inductors and capacitors may result in periodic reversals of the direction of energy flow.
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Power in an electric circuit is the rate of flow of energy past a given point of the circuit.
The portion of power that, averaged over a complete cycle of the AC waveform, results in net transfer of energy in one direction is known as active power (sometimes also called real power).
The portion of power due to stored energy, which returns to the source in each cycle, is known as reactive power.Źródło: https://en.wikipedia.org/wiki/AC_power
Websites of publications on electricityMany people are asking where to get knowledge about the repair of electrical installations? Although qualified electricians certainly have responded to this question guided by Asker toward the professional literature at the present time, most people sięgnęłaby rather on the Internet. In the virtual network, you can find plenty of information with almost every aspect of life, and therefore advice on electricity can be found there.
Such solutions are becoming more common due to its convenience and therefore need to repair this type of installation is becoming more common.
It is true that in this field the number of instructional videos is rather poor, but no shortage of sites with articles regarding the repair of electrical installations or simpler tasks that require knowledge of electrics.
Electrical systems useful in everyday life
Increasingly, repair of electrical installations applies to problems with the installation, which allows the automatic opening and closing of the gate, for example, when entering the garage and so on.
First of all, the problem can occur in drives to the gates, which may not respond to user requests or for example open instead of closed.
Systems control the opening and closing of gates and barriers are most commonly used in their construction, electrical components, so repair them must deal with the electrician..