Electricity
By definition, the electric voltage on the part of the chain is called the work performed by a single charge during the passage of this site. Namely, for his work in this world it is accepted to pay the money. Therefore essential (along with safety requirements) to connect the condition of any object is that all the TU power supply organization on accounting for electricity consumed, that is – work done electricity. In order to bring charges to the more convenient to measure recall that electric current – a value that shows the amount of charge passing through a conductor per unit of time. Consequently, multiplying it by the time and voltage, we get that same job. It is on this formula relies on electricity meters. Rotation speed (due to induction forces) aluminum disk is proportional to the current and voltage in the respective coils, and from time to time determines how much speed he makes at the same speed.
The rapid development of electronics not spared and electricity meters. Already the 70-ies (west) is the displacement induction meters with electronic weighing the benefits and additional features. This accuracy and mechanical reliability (no moving parts), and ease of verification, which reduces the software the introduction of the necessary coefficients. But the main thing – it's the ability to remotely read information (including – managed by a central computer) and an automatic change in the cost per kilowatt-hour, depending on the time of day when the most promising today multirate mode. Like any commodity, electricity is characterized not only by the quantity, but quality. Strictly speaking, the accounting of electricity involves measuring not only electrical work, and almost all the network parameters: peak power, frequency variations, voltage drops, leakage, reactive component, phase imbalance, etc.
Each value is fixed by the relevant instrument, and particularly important points are entered in a special paper journal, having the force of a legal document. Such information is of great value to economic analysts, the timely production of technical tasks to optimize energy consumption, improve efficiency and safe operation of electrical installations, resolving disputes with the energy supplying organization. The complex system of electricity metering exists not only in large enterprises. We also tracked individual consumers all the options, but for entire regions and localities. Prudent as the owner may on his own initiative to produce the most complete control of electrical quantities, and even on the scale of one apartment. Modern electronic meters combine many of the above features in one device.
