Electric meter is electricaldevice designed to take into account the consumption of electricity, both AC and DC. Electricity in this case is measured in kilowatts / hour (kW / h). Where it is necessary to monitor and monitor the consumption of electrical energy for certain periods of time, it is also necessary to connect the electricity meter.
Electric meters are single-phase and three-phase.The power meter is connected via a measuring current transformer (in the case of an indirect connection), but you can do without them (direct connection). Installing an electric meter in the network with a voltage of up to 380 Volts requires the use of a device for an electric current of 5 to 25 A. This is a mandatory rule. The choice of the meter is carried out in view of their types. Currently, there are two main ones - electronic and induction meters. Answering the question of which is better, electronic or induction, is quite difficult. It all depends on the functions assigned to them.
Induction meter based on principlesthe magnetic forces of the inductor and voltage with the magnetic force of the aluminum disk. As a result of this interaction, the number of revolutions of the disc will reflect the power consumption. For the summation of turns using a counting mechanism. Such counters are extremely simple, but already outdated. They cannot support multi-tariff accounting and do not have the ability to transfer readings remotely. Connecting an electric meter operating on an induction circuit is a simple matter, and in most cases does not even require special knowledge.
Electronic counters are based on microchips.In such devices there are no rotating parts, they simply convert the signals from the measuring elements into directly proportional values. Such electronic meters are highly reliable and accurate.
During a process such as connectingelectric meter, you need to pay attention to some parameters of the devices. On the front side, either the number of disk turns for induction meters or the number of pulses for electronic meters, which correspond to 1 kW / h, must be indicated.
An important parameter must be called andelectric meter accuracy class. This parameter indicates the degree of measurement uncertainty. Also, the tariff of the device should be called the most important parameter and pay attention to it in such a procedure as connecting an electric meter. Until recently, almost all meters that were used in everyday life were strictly one-rate. Modern digital meters can keep records in the zones of the day, and even by season.
Multi-tariff options are beneficial for the consumer:the system developed for such electric power meters allows you to automatically switch the tariff from day to night (at night the tariff is much lower, which motivates users to level the daily load pattern).
