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 3- or 4-wire AC lines operating at 50 Hz. Additional instrument transformers may be used when connecting.
Thanks to this, a three-phase meter has the ability to take into account losses and tariffs for daily zones, accumulate information on electricity consumption and transmit the received measurements via interface digital 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.
You can use a three-phase meter both independently and together with other information-measuring devices intended for technical and commercial accounting.
The scope of meters is quite extensive: they are used in industrial enterprises (industrial or commercial), in various publicbuildings and structures, residential buildings, mobile structures, garages, cottages, etc.
The three-phase meter is manufactured in accordance with regulatory documentation, which includes various technical conditions and safety requirements. Each device must have the 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. Self-propelled protection.
4. Protection against external fields, such as electromagnetic.
5. Resistant to voltage dips and power outages.6. A three-phase meter must have a telemetry output and a light indicator of the operating status. In addition, there must be a voltage sensor in the electrical network, as well as the load at the consumer.
Each three-phase meter has the following specifications:
1. Service life is about 30 years.
2. Required accuracy class for active and reactive energy.
3. Rated voltage and current.
4. Required level of sensitivity to changes in the amount of electricity.
5. Number of tariffs and tariff seasons.
6. Apparent and active power consumption of meter circuits.
7. Weight and dimensions.8. Verification interval.
A three-phase meter is made in a plastic case with a sufficient degree of protection againstpenetration of dust and moisture. Integrated circuits, measuring current transformers, a readout device and a terminal block are located inside. In turn, the clamps, the telemetry output, as well as the control circuit, undergo a sealing procedure and are closed with a plastic cover.
A three-phase meter has the following functions: measurement, storage, indication and metering of electricity consumption separately for each tariff, as well as the total value of these quantities for various periods of time: from a day to a year and the entire period of operation.
