The unchanged quality of household control and accounting devices is their perfect and correct working capacity. Therefore, the connection and installation of household electricity meters in the apartment must be entrusted to specialists. After all, you still have to apply for registration of the installed meter in Energonadzor.
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Electricity meters - single- or three-phase?
Existing electricity meters are distinguished by design, type of connection and measured values. The single-phase electricity meter provides the necessary consumer properties to the fullest. This measurement and calculation of the values of AC and DC with the parameters of 220 V. 50 Hz. There are single-phase induction meters (mechanical) and electronic. Thanks to the achievements of electronics, electronic meters are currently in high demand.
Characteristics of single-phase counter
Household single-phase meters are designed specifically for metering electricity at a set tariff. What is characteristic of the counter single-phase constructively and technologically?
These are the following qualitative parameters:
• low power consumption of the device itself
• use as a measurement of the current of the shunting unit
• standard telemetry output
• Clear light indication
• Enhanced security features that exclude theft and access.
Learn more about the technical characteristics of a single-phase counter video will help you.
What does the counter cost depend on?
When selecting an electric meter for subsequent installation, you need to determine the type and scheme of its connection. It is necessary to distinguish the following types of electronic single-phase meters:
• one-tariff
• two-tariff
• multi-tariff.
Special interest for electricity consumers is caused by a single-phase multi-tariff meter.
The undisputed positive quality of electronic meters is the differentiated ability to account for electricity. A differentiated calculation of electricity consists of different tariff factors over time periods.
Tariffs for periods of time are divided into several groups:
• full tariff for commercial time (from 7 am to 11 pm)
• 0,7 basic tariff at night with minimum power system load (from 23 hours to 7:00 am)
• Differentiated tariffs during commercial hours.
The transition to sparing differential tariffs is possible only if there is an officially established and registered multi-tariff meter. Therefore, the desire to save on paying for electricity will depend on the preparation of documents from your initiative.
Select single-phase counter
What is necessary to pay attention of the consumer of the electric power at a choice of a single-phase electric meter at purchase in specialized shops? The first thing you should pay attention to when selecting a meter is the technical conditions (TU) for the electricity supply of your apartment.
Specifically, the specification specifies the parameters of power supply and power consumption. These parameters will be fundamental if you intend to install a multi-tariff counter. When buying, pay attention to the marking, located directly on the outer part of the meter body. The marking with reliable accuracy will indicate the parameters of the current of the maximum load and operating voltage. It will be necessary to check the presence and safety of the seal, as well as the date of the master. The meter for single-phase electricity meters is from 2 years.
Single-phase meter connection scheme
Single-phase electronic electricity meters installed in apartments have practically the same connection scheme.
This is a direct inclusion scheme. This scheme for connecting a single-phase meter does not depend on the type of meter selected or already installed. A characteristic feature of a single-phase meter is the presence of four terminals on the housing for connecting the electric cable.
A phase wire is connected to the first terminal, which is the input. On the second terminal, connect the wire that goes to the apartment for a load and is the output. On the third terminal, connect the neutral wire, this is the input. And on the fourth terminal connect the zero wire, going to the load (output).
As you can see, there is nothing abstruse when connected, so connecting a single-phase meter can be done by oneself. As a rule, the connection diagram is available on the inside of the meter body. The connection of the electricity meter will be only in the way of mounting: on the body or DIN rail.
How to install a single-phase electricity meter, shown in this video.
Fastening of wires and installation of the electric meter
Fastening of wires to terminals of the electric meter is carried out with application of screw connection. The power supply from the output terminals of the single-phase meter goes to the distribution and protection devices. In this case, the "phase" goes to the differential automatics, RCDs and fuses, and "zero" goes to the common terminal. It is advisable to dispose of this electrical equipment in one flap.
A specially manufactured shield allows you to reliably mount an electric meter and the necessary electrical appliances. The height of the shield with an electric meter is from 1.4 m to 1.7. It is desirable to position the visible control panel at eye level.
What is constructive and technological is a shield for installing an electricity meter, you will be prompted by a video.
Sealing of single-phase counter
The connection of a single-phase electricity meter in the apartment, as well as subsequent monitoring is carried out by monitoring organizations. Correctness and correctness of connection according to the established norms of energy consumption confirms the sealing of the device.
Sealing of the device - the electric meter excludes the possibility of an independent alteration or completion of the meter connection.
Thus, the practicability and expediency of installing this type of meter is confirmed by the relevant supervisory organization of the Energy Supervision Authority.
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