As you know, a three-phase electricity meter is a technical product that is designed to account for energy consumption, both active and reactive, as well as power in electrical networks. This unit can be connected to three- and four-wire AC lines operating at a frequency of 50 Hz. When connected, additional measuring transformers can be used.
Due to this, the three-phase meter has the ability to take into account losses and tariffs for daily zones, accumulate information about electricity consumption and transmit the measurements obtained through digital interface channels.
Each three-phase meter is an analog-to-digital device that sums up the energy consumed and displays information immediately in kilowatt hours on an indicator mounted on the reading device.
The three-phase meter can be used both independently and together with other information-measuring devices intended for technical and commercial metering.
The scope of the meters is quite extensive: they are used in industrial enterprises (industrial or commercial), in various public buildings and structures, residential buildings, mobile structures, garages, summer cottages, etc.
A three-phase meter is manufactured in accordance with regulatory documentation, which includes various specifications and safety requirements. Each device must have an appropriate certificate.
The three-phase meter has the following features:
1. Ability to switch tariffs.
2. Resistance to various mechanical influences, as well as environmental conditions.
3. Protection against self-propelled.
4. Protection against external fields, such as electromagnetic.
5. Resistance to voltage dips, as well as power outages.
6. The three-phase meter should have a telemetric output and a light indicator of the operating state. In addition, there should be a voltage sensor in the electrical network, as well as the load of the consumer.
Each three-phase meter has the following technical characteristics:
1. The service life is about 30 years.
2. The required accuracy class for active and reactive energy.
3. Rated voltage and current.
4. The required level of sensitivity to changes in the amount of electricity.
5. The number of tariffs and tariff seasons.
6. The total and active power consumption of the meter circuits.
7. Mass-dimensional indicators.
8. The verification interval.
The three-phase meter is carried out in a plastic case, which has a sufficient degree of protection against the ingress of dust and moisture. Inside are integrated circuits, measuring current transformers, reading device and terminal block. In turn, the clamps, telemetric output, as well as the control circuit are sealed and closed with a plastic cover.
A three-phase meter has the following functions: measuring, storing, indicating and accounting for electricity consumption separately for each tariff, as well as the total value of these values for various time periods: from a day to a year and the entire period of operation.