The size of the meter. Which electricity meter is better to put in an apartment: choose a device

Content:

Electricity is the best-selling commodity. But unlike other energy carriers, there is no state of aggregation for it, as for water, gas or oil products. Until now, there has been no other way to estimate its quantity, except for the use of an electricity meter. The income of the electricity seller depends on the latter. The consumer is equally interested in the properties of the electric meter. Next, we will acquaint our readers-electricity consumers with useful information regarding electric meters. Consider these questions:

• what are electricity meters?
• what is the difference between a three-phase induction electric meter and a single-phase meter;
• why now they demand to replace the used induction model with a modern electric meter for an apartment;
• which electric meter is better to put in the apartment;
• types of electric meters recommended for installation in an apartment and in a private house, as well as their rating.

Electricity metering today

As new energy-saving technologies emerge, household electrical appliances and industrial equipment are becoming more economical. Refrigerators, washing machines, televisions, and many other household electrical and electronic devices consume an order of magnitude less electricity than their predecessors some 20 to 30 years ago. In those days, induction models of electric meters worked everywhere. It could not be otherwise - there were no other instruments at all. The digital age has just begun.

The induction single-phase electric meter was at one time the most common electrical appliance. They installed a meter in an apartment, non-residential premises and in many other institutions. Its structural reliability was a guarantor of durability. Until now, a considerable number of these metering devices regularly wind up kilowatts where the need to replace them with more advanced modern digital models has not reached them. The weak point of induction meters is the accounting for low powers. And since electricity prices have recently increased many times, every watt, or even its fractions, must be taken into account.

An induction electricity meter with its design resembles an electric engine. All similar electric meters, regardless of the model, contain a voltage winding and a current winding. Between the cores of these windings is a rotor in the form of a disk. The speed of its rotation is directly proportional to the strength of the current in the windings. During rotation, the disk performs the work of moving the wheels on which the numbers are applied. This counting mechanism requires a certain force created by the disk to work. This explains the lack of accuracy provided by electric meters of this design.

• At low consumed load currents, the disk cannot move the counting mechanism.

Because of this design feature, induction electricity meters are being replaced everywhere. And not only single-phase. Since a three-phase meter has a similar design, but with two disks, it is difficult to place all the necessary windings on one. It can be used not only with three phases, but also as a two-phase electricity meter. But because of the even more massive 2-disk moving system, 3-phase electricity meters have even higher errors at light load. Today, for both home and industrial needs, electricity meters must combine reliability and accuracy.

Which counter to choose

So, everyone will have to decide in connection with the requirement of the organization supplying electricity, which meter to choose to replace the induction model. However, there is one important caveat to this decision. The choice of an electric meter for an apartment must necessarily take into account the opinion of the electricity supplier. If the apartment electricity meter is properly installed with your own hands, it still needs to be sealed by calling the appropriate specialist for this.

And no matter how reliable, convenient and attractive to the owner this instance, if it is not on the list of recommended electricity supplier meters, it is very likely that it will have to be replaced with a model from the list. Therefore, when choosing a replacement for an outdated induction electricity meter or otherwise, you must first contact the power supply service with the question of which meter to choose in accordance with the existing requirements.

Nevertheless, which electric meter to choose is finally decided by the owner of the apartment or house. Undoubtedly, experts will recommend which meter is best for specific conditions of electricity consumption. However, it is good to know in advance what counters are. A modern electricity meter for an apartment is an accurate, reliable household electrical measuring device.

Modern electronic meters can differ markedly from each other. The single-phase or three-phase version today contains an electronic circuit that calculates the power consumption. This is the main common design feature of all digital models. But in many cases it is possible to notice how one model differs from another without much difficulty. First of all, this is the principle of operation of the scoreboard in the counter. It can be either with a mechanical device, as in the induction model of past years, or with indicators on liquid crystals. LED indication in these electrical appliances is almost never used.

Considering the differences in the scoreboard, it is impossible to say which of these meter models is better for an apartment. In an apartment building, the choice of an electricity meter is usually not required. The specialists responsible for this install their meters instead of induction meters. In private houses and dachas, the situation may be different, especially in dacha cooperatives and similar collective organizations. Recently, it has been customary to delimit areas of responsibility. Moreover, the meter belongs to the zone of services supplied by the power supply service.

Therefore, the question "How to choose an electricity meter?" for such a zone receives a specific condition:

• the electricity meter is installed outdoors in a special box and must remain operational throughout the entire temperature range that exists at the installation site.

For such operating conditions, it is preferable to choose an electric meter with an electromechanical display. This device is generally more reliable than liquid crystal display. The wheels with numbers are not affected by temperatures and, in principle, cannot break even from a lightning strike. In this case, the last reading is always saved by the position of the wheels. But in an electronic counter with a liquid crystal display, data is accumulated in a special chip. Whether this chip will withstand a lightning strike is not exactly known. But other reasons for the failure of this chip are not excluded.

• It is possible to take readings from the liquid crystal display only at a working counter. If a power outage occurs, after a short time, the indication disappears in many models. But readings can be taken from the electromechanical display regardless of the state of the device.

Among other nuances, before choosing an electric meter, you need to study the existing electricity tariffs. Since a two-tariff device provides an opportunity for significant energy savings, it is better to buy and install it right away if such a tariff division exists. But billing can be more ramified. This means that a two-tariff electricity meter will not be able to provide the full benefit.

Therefore, you need to buy a meter with a large number of connected tariffs. Such models are available on the market, as shown in the image below.

Regarding the rating and popularity of models of electric meters, there is such information. According to 2016 data, TM Mercury, Energomera and Neva were in the greatest demand. These brands correspond to six meter models with the following evaluation criteria:

• design with electromechanical scoreboard;
• the same, but with indicators on liquid crystals;
• design for multiple rates;
• three-phase electric meter.

For the listed models, the mechanism for attaching the case during installation was also evaluated, including the possibility of using a DIN rail. It was also taken into account how well the numbers of the scoreboard are visible, the convenience of the case design, taking into account sealing. An important value is attached to the meter model by the maximum amount of current that can be taken into account. This is especially true for private houses and summer cottages, since it is often difficult to do without heating electrical appliances, which are turned on at least for a short time.

But at the same time, the consumed current increases many times, which should be covered by the capabilities of the electricity meter. Therefore, in principle, it is important immediately, when connecting the house to the mains, to choose its most suitable variety, and, accordingly, the meter. If the total current consumed is significantly more than 20 amperes, it is more correct to choose a three-phase connection. In this case, the electric meter is not necessarily installed on a three-phase model.

The choice of electricity meters on the market is now large, and you can select a separate single-phase meter for each phase and summarize their readings. Such a metering system can provide more useful information for optimizing energy savings. Another important convenience that is used in many modern meters is remote data exchange. For this purpose, a special radio module is built into them. Its operating frequency determines the distance from which data on consumed electricity can be obtained.

At the same time, a personal meeting with a representative of the power supply service is not required, as was previously the case with the widespread use of induction electricity meters. In a word, there are a lot of technical possibilities embedded in digital models. Their reliability mainly depends on the quality of assembly and components. By purchasing products of well-known brands, you can be sure that this device will work for a long time and without malfunctions.

Each room in which electricity is supplied has an electricity meter. Exceptions can only be those facilities that are equipped with a fully autonomous system, such as windmills and solar panels.

Types of electricity meters

Single-phase induction electricity meters

An electric meter is a device for measuring the consumption of AC and DC electricity.

There are two types of these devices: electronic and induction models. All of them differ in the principle of their work, but this does not affect the accuracy of the calculations, since before the sale each device is checked and, if necessary, calibrated by employees of the relevant organizations. The companies are independent, so you should not expect a dirty trick in their activities. To make it easier to determine the appropriate type of electrical appliance in a particular case, you need to study in more detail the features of each.

Induction

This variety is widely distributed due to a large number of advantageous features. This is a traditional design, equipped with a rotating wheel. The work is based on the principles of the magnetic field. This field forms several coils - current and voltage. They set the disk in motion, which starts the counting mechanism.

Of the shortcomings, it is worth noting the accuracy of the calculation. The error is within the acceptable range, but the results could be better.

An essential advantage of the device is its long service life. Some manufacturers give a guarantee on their devices for 10-15 years.

Electronic

Modular three-phase electronic electricity meter

This variety can be considered relatively new. The principle of operation is based on the measurement of voltage and current in the electrical network. There are no intermediate mechanisms, which ensures high accuracy of work. All readings are displayed on a small display and are also stored in the built-in memory. More details about the advantages of devices:

• Compact dimensions.
• It cannot be stopped or slowed down with a magnet.
• All models are equipped with a multi-tariff function.
• There is a built-in self-correction of indications.
• Convenient reading.
• The accuracy of the readings can be improved further, for this a special microcircuit is installed.

Despite the large number of advantages, there are also disadvantages. The most significant is the high cost.

Single-tariff and multi-tariff types of electricity meters

One-rate devices can be called traditional. These are devices that all residents of the post-Soviet space are accustomed to.

Multi-tariff meters in Russia are new, as they have come into use by consumers relatively recently. The main objective of such a device is to reduce the financial costs of consumers. The essence of saving lies in the difference in the cost of electricity from the time of day. At night and in the morning it is less than in the evening.

Single-phase multi-tariff electricity meter CE102-R5.1 Single-phase single-tariff electricity meter Taipit Neva 103.5 1S0

Automatic type of electricity meter

The automatic type of electric meter is a kind of electronic models. Its peculiarity lies in the automatic transfer of data without the participation of homeowners. The process takes place in a timely manner, without loss of personal time. Such devices are not yet very common in Russia, but experts suggest that in 10-15 years they will be in every second apartment.

Advantages and disadvantages of multitariffing

Dividing the day into zones for monitoring electricity by multi-tariff meters

New metering devices have their own design features, as well as advantages and disadvantages, which are mandatory for review when choosing a device. The advantages should include:

• Environmental friendliness. The amount of harmful and poisoning nature and people emissions into the atmosphere is reduced.
• Tangible family budget savings. As experience shows, the device fully pays for itself within one year.
• Facilitating the work of power plants: fuel savings, reducing the cost of repairs and maintenance.

Among the shortcomings of the devices, it is worth highlighting only the need to adapt to the tariffs of the meter. If you neglect this, the amount of expenses will not decrease.

Accuracy class of devices and their power

Table of required accuracy classes for settlement active electricity meters

The accuracy class of the device as a percentage calculates the calculation error. Today, you can use electric meters with an accuracy class of at least 2.0.

Another important performance parameter is power. It is taken into account even when choosing a device, based on the daily consumption of electricity - the total load on the electrical circuit in an apartment, house. The range includes meters with a current load from 5 to 100 amperes.

Conditions of use and fastening methods

Modern metering devices are fixed on a special DIN rail or on bolts.

Taking into account the working conditions, the equipment is divided into all-weather, designed for outdoor use, and used only in heated and dry rooms. The cost of the latest models is lower.

Which model is better to choose

Requirements for electricity meters

When choosing a device for metering consumed electricity, it is important that the requirements of GOST are taken into account:

• The model must be entered in the general register of metering devices approved in the Russian Federation, and also have an unexpired verification certificate.
• The accuracy class must comply with the regulated regulatory legal acts (not lower than 2.0).
• Each instrument must have a government stamped seal on the terminal housing. If the counter is installed for the first time, you need to make sure that the seal is not older than 2-3 years.

To simplify the selection process, you should familiarize yourself with the rating of the best models.

Single tariff, single phase	Mercury 201; Energomer CE-101; ABB FBU-11200; Neva 101103.
Multi-tariff, single-phase	Mercury 200-2; Energomer CE-102; ABB FBU-11205; Neva MT-114.
Three-phase, single tariff	Mercury 231 AM-01; Energomer CE-300; Neva MT-324; Neva 303-306.
Three-phase, multi-tariff	Mercury 231 AT-01; Energy meter CE-301.

Mercury 201 ABB FBU-11205 Energomera CE-301 Neva MT-324

The choice of an electric meter should be approached with all responsibility, otherwise the readings may be incorrect, which will lead to penalties from organizations.

Principle of operation

To account for active and reactive AC electricity, induction single- and three-phase devices are used, to account for the consumption of DC electricity (electric transport, electrified railway) - electrodynamic meters. The number of revolutions of the moving part of the device, proportional to the amount of electricity, is recorded by a counting mechanism.

According to the measured values, electric meters are divided into single-phase (measuring alternating current 220 V, 50 Hz) and three-phase (380 V, 50 Hz). All modern electronic three-phase meters support single-phase accounting.

There are also three-phase meters for measuring current with a voltage of 100 V, which are used only with current transformers in high-voltage (voltage above 660 V) circuits.

By design: induction(electromechanical electricity meter) is an electricity meter in which the magnetic field of stationary current-carrying coils affects a movable element made of conductive material. The movable element is a disk through which currents induced by the magnetic field of the coils flow. The number of disk revolutions in this case is directly proportional to the consumed electricity.

Induction (mechanical) electricity meters are constantly being squeezed out of the market by electronic meters due to certain shortcomings: the lack of remote automatic reading, single tariff, metering errors, poor protection against electricity theft, as well as low functionality, inconvenience in installation and operation compared to modern electronic appliances. Induction meters are well suited for apartments with low energy consumption.

Electronic(static electricity meter) is an electricity meter in which alternating current and voltage act on solid-state (electronic) elements to create pulses at the output, the number of which is proportional to the measured active energy. That is, active energy measurements by such electric meters are based on the conversion of analog current and voltage input signals into a counting pulse. The measuring element of the electronic electricity meter is used to create pulses at the output, the number of which is proportional to the measured active energy. The counting mechanism is an electromechanical (beneficial in cold climates when installed outdoors) or electronic device containing both a memory and a display. Electronic meters are well suited for apartments with high energy consumption and for businesses.

The main advantages of electronic electricity meters is the ability to account for electricity at differentiated tariffs (one-, two- or more tariffs), that is, the ability to remember and show the amount of electricity used depending on the programmed time periods, multi-tariff accounting is achieved through a set of counting mechanisms, each of which operates at set time intervals corresponding to different tariffs. Electronic electricity meters have a longer calibration period (4-16 years).

hybrid electricity meters - a rarely used intermediate option with a digital interface, an induction or electronic type measuring part, a mechanical computing device.

Types and types of electricity meters

Electrical energy meter (electric meter) - a device for measuring the consumption of AC or DC electricity (usually in kWh or Ah).

Types and types of electricity meters

Electrical energy meter (electric meter) - a device for measuring the consumption of AC or DC electricity (usually in kWh or Ah).

The electric meter is that necessary electrical measuring device, which is necessary for installation in every house to which electricity is supplied. To date, there are several main types of electricity meters, which are classified according to:

• The type of current used - direct and alternating.
• Number of phases - single-phase, three-phase.
• The number of tariffs - single and multi-tariff.
• Type of working mechanism - mechanical, electronic.

Buying electricity meters of any kind today is not at all a problem, since they are sold in almost every household appliance store, and it’s not at all difficult to find them on the market. The main thing, when buying for yourself any kind of electric meter, is to choose it correctly, as they say, “for yourself”.

To account for active and reactive AC electricity, induction single- and three-phase devices are used, to account for the consumption of DC electricity (electric transport, electrified railway) - electrodynamic meters. The amount of electricity proportional to the number of revolutions of the moving part of the device is recorded by the counting mechanism.

In the electric meter of the induction system, the moving part (aluminum disk) rotates during the consumption of electricity, the consumption of which is determined by the readings of the counting mechanism. The disc rotates due to eddy currents induced in it by the magnetic field of the counter coil - the magnetic field of eddy currents interacts with the magnetic field of the counter coil.

In an electronic type electric meter, alternating current and voltage act on solid-state (electronic) elements to create pulses at the output, the number of which is proportional to the measured active energy.

Electricity meters can be classified according to the type of measured values, the type of connection and the type of construction.

According to the type of connection, all meters are divided into devices for direct connection to the power circuit and transformer devices connected to the power circuit through special instrument transformers.

According to the measured values, electric meters are divided into single-phase (measuring alternating current 220V, 50Hz) and three-phase (380V, 50Hz). All modern electronic three-phase meters support single-phase accounting. There are also three-phase meters for measuring current with a voltage of 100V, which are used only with current transformers in high-voltage (voltage above 660V) circuits.

By design: an induction (electromechanical electric meter) is an electric meter in which the magnetic field of stationary conductive coils affects a movable element made of conductive material. The movable element is a disk through which currents induced by the magnetic field of the coils flow. The amount of electricity consumed, in this case, is directly proportional to the number of revolutions of the disk.

Induction (mechanical) counters electricity is constantly being squeezed out of the market by electronic meters due to certain shortcomings: the lack of remote automatic reading, single tariff, metering errors, poor protection against electricity theft, as well as low functionality, inconvenience in installation and operation compared to modern electronic devices. Induction meters are well suited for apartments with low energy consumption.

Electronic counter is a converter of an analog signal into a pulse repetition rate, the counting of which gives the amount of energy consumed.

The main advantage of electronic meters compared to induction meters is the absence of rotating elements. In addition, they provide a wider range of input voltages, make it easy to organize multi-tariff accounting systems, have a retrospective mode - i.e. allow you to see the amount of energy consumed for a certain period - usually monthly; measure the power consumption, easily fit into the configuration of AMR systems and have many more additional service functions.

The main advantages of electronic electricity meters is the ability to account for electricity at differentiated tariffs (one-, two- or more tariffs), that is, the ability to remember and display the amount of electricity used depending on the programmed time periods, multi-tariff accounting is achieved through a set of counting mechanisms, each of which operates at set time intervals corresponding to different tariffs. Electronic electricity meters have a longer calibration period (4-16 years).

Hybrid electricity meters- a rarely used intermediate version with a digital interface, an induction or electronic type measuring part, a mechanical computing device.

The first thing you should pay attention to when choosing a meter is the type of current that is used in your home. As mentioned above, meters are available for three-phase and two-phase current (the latter type of current is found everywhere in our country), which means that you need to choose the right meter. Also, when choosing a meter for yourself, you need to pay attention to their modern appearance, which can work at two rates - day and night. Using such a meter will allow you to significantly reduce your energy costs. The meaning of this savings is that this meter can operate at two rates - during the day at the usual rate, and at night - at a cheaper one (since at night in our country electricity costs much less than during the day).

After you purchase a meter for yourself, be sure to apply to the relevant authorities (these may be local authorities of the City Council or Regional Light), which will install this meter for you, seal it and enter it in the register. In no case do not install the meters yourself, as during the inspection by the relevant authorities you may be issued a considerable fine.

Accounting for electricity consumed by all appliances and lamps available in the apartment is made by electricity meters. According to their testimony, the payment for the use of electricity is calculated. If there are doubts about the correctness of the meter readings, it can be easily checked. To do this, you must first of all disconnect from the network all the lamps, appliances, radios in the apartment and make sure that the counter disk, which is visible in the viewing window, does not rotate. If the disk continues to rotate, then this means that the device has not been turned off somewhere. It must be turned off, otherwise you will not check the counter.

Types and types of electricity meters - answers and advice to your questions

Electrical energy meter (electric meter) is a device for measuring AC or DC electricity consumption (usually in kWh or Ah). The electric meter is that necessary electrical measuring device, which is necessary for installation in every house to which electricity is supplied. To date, there are several main types of electricity meters, which are classified according to: Type of current used - direct and.

Connecting an electricity meter with your own hands - how to do without specialists?

Electricity metering devices are installed in all houses and buildings without exception, where it is consumed. Installation of such devices is carried out by professional masters. But the connection of the electricity meter is allowed to be done independently. This operation must be coordinated with the local energy supplier by issuing a standard contract with him and receiving the required technical documentation.

If a person plans to independently connect a meter for consumed electricity in a private house or apartment, he should contact the city (district) office of the supply company. Its specialists will draw up a contract for the supply of energy resources and a permit for the installation of an electric meter (ESCh).

After installing the metering device, the consumer applies to the supplier with a statement. In it, he asks to take the new counter into operation. The supplying organization sends its representative to the ESC installation address, who inspects the equipment, checks it for correct connection and draws up an act.

Calculations for the consumed electricity begin to be made from the date of signing the act of acceptance of the meter into operation. This document must indicate the initial readings of the ESC, its type and number.

Electric meters are divided into mechanical (induction) and electronic. They differ from each other in the principle of operation and device. Devices of the first type have metal round disks. They begin to rotate when the current passes through the ESC and count the consumed kilowatts.

Mechanical devices have an acceptable cost, are characterized by durability and trouble-free operation. But they have one drawback. It lies in the low accuracy of the given readings. For this reason, now more and more apartments and private houses are equipped with electronic metering devices (PU). They count the number of kilowatts used with a minimum error.

Electronic counters consist of semiconductor elements and microcircuits. They have no moving parts. They are distinguished by their versatility, compact size, and the ability to operate in a multi-tariff mode. The cost of such devices is quite high, but the cost of them pays off quickly. Especially when PUs are installed in regions where night and day electricity tariffs exist.

ESC are single- and three-phase. The former are more common. They stand in apartments of high-rise buildings, country houses. Devices with three phases are mounted in large private cottages, at production facilities. Some of their models are allowed to be connected to single-phase current networks.

In cases where the ESC is planned to be installed on the street (in a country house or in a private house), it is necessary to purchase a special box (YaUR-NG). It is a sealed box, which is equipped with:

• DIN rail used to connect distribution elements;
• compartment for sealing the circuit breaker;
• fasteners and a place for mounting the box on a pole, facade or residential building.

There are boxes for indoor installation. Instead, it is allowed to use mounting panels on which there are places for connecting additional machines.

Homeowners in multi-storey buildings install electricity meters on the site in a common shield. In some skyscrapers, the installation of metering devices is carried out in the hallway or room of the apartment.

Do-it-yourself connection of an electronic or induction electric meter is carried out in compliance with the mandatory requirements. They are listed below:

• Installation of equipment in the room is carried out at a positive temperature. The room must be dry. Do not install metering devices in kitchens, bathrooms, toilets, where there is always high humidity.
• The ESC is mounted on a plastic or metal shield, which can be mounted indoors directly on the wall.
• It is not allowed to install an electric meter with an inclination higher than 1°. In this case, the PU will give readings with a high level of error.
• The installation height of the ESC is 80–160 cm. It is optimal when it is located at the eye level of a person with an average height.
• In places where accounting equipment may be contaminated or damaged by unauthorized persons, the device must be placed in a lockable distribution box.
• The installation of the electricity meter is carried out strictly with the introductory machine turned off.
• In suburban areas and in private housing construction, wires leading to the ESC are allowed to be laid in the air (cable scheme) or in the ground.

The input cable is selected according to the cross section, which guarantees an accident-free supply of electricity to the home. It does not allow the presence of adhesions and twists.

It is recommended to additionally install a special circuit breaker in front of the meter. It limits the current power and allows you to stop its supply to the object when replacing the control unit, short circuits, fires or repairs. Such a device must be sealed by the controller of the power supply organization.

Devices with one phase have four terminal contacts. Through them, the general electrical network is supplied to the dwelling. All consumers in the house or apartment are connected via one phase cable (diagram below).

Work begins with the installation of fasteners designed to fix the meter. Then the electricity meter is connected according to the following algorithm:

• The indicator-screwdriver (when the voltage is on) determines the neutral and working wires of a single-phase intra-house network. It is necessary to touch the test tool to the ends of the existing cores. At the phase (working cable), the indicator on the screwdriver lights up, at zero - no.
• Similarly, there is a phase conductor in the switchboard. Usually it is marked in red.
• The ESC is installed in the switchboard (on the wall in the apartment, outside the private house).
• Housing is depleted.

There are terminal contacts (4 pieces) on the PU body (in the lower part). Two of them (located on the right) are used to drain and supply neutral wires leading to the dwelling and to the general network, two more (on the left) are used to connect phase cables.

The bare and stripped ends of the core are inserted into the terminals and fixed with screws. Phase wires are connected. Neutral wires are mounted in the same way.

After that, voltage is applied to the house building and the performance of the metering device is checked. If it functions normally, the consumer calls a power sales specialist. The controller inspects the meter, draws up an act of acceptance into operation and seals it.

Nuance. If it is planned to put an on-and-off switch in front of the control panel, power wires - zero and phase - should be connected to its contacts located on top. And the meter itself is connected to this device through the lower terminals (the cables are connected in the same way).

ESP with three phases are divided into three types - direct, semi-indirect and indirect switching. The first ones are allowed to be connected directly to the 380 or 220 V network. They operate with a current not exceeding 100 A, characterized by a maximum throughput of 60 kW. Cables with a cross section of not more than 25 square meters are connected to such devices. mm.

A three-phase device has 8 terminal contacts. Two of them are needed to connect zero cores, the next two are for installing intra-apartment and common house cables. The remaining terminals are used for the withdrawal and supply of phase wires.

The principle of direct connection of an ESC with three phases is similar to the scheme according to which ordinary single-phase devices are mounted. Here you just have to be very careful and connect the wires correctly: phase A (first) goes to the yellow cable, B (second) to green, C (third) to red. The ground wire in the figure has a yellow-green color, the zero wire is blue.

Semi-indirect type electric meters are connected to 380 V networks strictly through special transformers, the task of which is to reduce the voltage and primary currents to safe indicators for the meter. A common connection diagram for such devices is shown below.

Under I1 and I2 they understand the input and output of the transformer winding, under L1 and L2 - the input and output of power conductors. To implement the circuit, you have to connect 10 wires. This is a minus, not every home craftsman can handle such work with his own hands. But such a connection guarantees maximum electrical safety of the home due to the separation of voltage and current circuits.

The second popular scheme is called the Star. It requires fewer wires. In this case, output I2 combines all the windings of the transformer into one point, which is connected to the neutral core.

Indirect three-phase connection in residential premises is not used. It is used only in industrial facilities.

Replacing an old meter in an operated dwelling or installing a new ESC in a newly built house, as can be seen from the article, is quite realistic without the help of specialists. In this case, the correct choice of an electric meter is of great importance. It is best to find out in the power supply company which control unit should be purchased.

When buying a meter, you should make sure that a technical data sheet and installation instructions are attached to it. These documents state:

• diagrams of the device and its connection;
• date of manufacture and verification;
• factory number;
• specifications.

The most popular in the CIS are considered to be the ESC of two brands - Energomera and Mercury. They are certified in the Russian Federation, are supplied with installation manuals, and are distinguished by a high level of operational reliability.

The Energomera Concern consists of several electrical engineering plants in Russia and Ukraine. They produce counters of different types:

• Multi-tariff single-phase - CE 102M-S7, 102-R5. 1, 208-R5, 201-S7. Such PUs allow you to measure reactive and active electrical energy in the reverse and forward directions.
• Single tariff with one phase - CE 101-R5, 200-S4, 101-S6. Are intended for direct inclusion of household counters.
• Three-phase (single and multi-tariff) - TsE 6803V (R31, Sh33, R32), CE 301 (307) -R33, CE 303 (S31, S34). This equipment is connected to the mains either directly or through transformers.

Under the Mercury brand, ESCs of the Incotex research and production holding are produced. The company's product range includes all types of metering devices, ranging from simple single-phase (201.8 TLO, Mercury 200 and 201) to complex three-phase models for domestic and industrial use (236 ART, 234 ARTM, 231 AT).

How to connect an electricity meter with your own hands: in an apartment and a private house

Connecting an electricity meter in a house or apartment is carried out according to different schemes. The choice of a specific option depends on the type of metering device installed.

Types of electricity meters and their capabilities.

Electric meter- an electrical measuring device designed to account for the consumed electrical energy (alternating or direct current) and is measured in kW / h or A / h. Electricity meters applied where legal consumption of electricity and it becomes possible to save the budget by monitoring the consumption of electricity in a given period of time.

Currently produced single-phase and three-phase meters, induction or electronic, one-tariff, two-tariff, three-tariff or they are multi-tariff. Electric meter connected to the network through current transformers (indirect connection) and without them (direct connection). For inclusion in a network with voltage up to 380 V, meters for current from 5 to 20 A are used. On the front side counter the number of disc revolutions corresponding to 1 kWh of electricity is indicated. For example, 1 kWh - 1250 disk revolutions.

Currently used mainly two types of electricity meters – induction and electronic by functionality multi-tariff meters (two-tariff and three-tariff). At the same time, the former occupy a dominant position, since they were established until the mid-1990s.

The question arises, which electricity meter is better – induction meter or electronic meter? To answer it, you need to understand what tasks will be assigned to the acquired electric meter, except for simply writing off testimony once a month. Will they need consumer of electricity numerous functions included in most electronic counters?

Let's take a look at each type of electricity meters and their way of working to determine your needs:

Principle of operation induction electricity meters consists in the interaction of the magnetic forces of the current and voltage inductors with the magnetic forces of the aluminum disk, as a result of the interaction, the number of revolutions of the disk directly proportionally reflects electricity consumption special counting mechanism. Many consumers are in no hurry to switch to more modern electronic meters, Although induction meters are physically obsolete and do not support multi-tariff electricity metering and the possibility of remote transmission of testimony.

Unlike induction meters, electronic electricity meters built on the basis of microcircuits, do not contain rotating parts and convert the signals coming from the measuring elements into proportional values ​​of power and energy. Electronic electricity meters are more accurate and reliable than induction electricity meters.

It is also important to know the basic technical parameters of electricity meters:

Accuracy class– main technical parameter electric meter. It indicates the level of measurement error of the device. Until the mid-90s, all meters installed in residential buildings had an accuracy class of 2.5 (the maximum permissible error level was 2.5%). In 1996, a new standard for the accuracy of metering devices used in the domestic sector, 2.0, was introduced. This was the impetus for the widespread replacement induction electricity meters on more accurate electricity meters, with accuracy class 2.0

Also an important technical parameter electricity meters is tariff. Until recently, all electricity meters used in everyday life were single-tariff. Functionality modern electronic two-tariff and three-tariff meters allow you to keep records of electricity by zone of the day and even by season.

There is currently large selection of electricity meters. Each of them has its own special characteristics, a different set of functionality.

Of course, not everyone needs such options, some want a simple, reliable and accurate device at a minimal price. From a wide range of electricity meters Can choose exactly the one which is the most suitable.

Electricity metering in two time-of-day zones, popularly known as "Two tariff" and electricity metering in three time-of-day zones, popularly as "Three tariff".

Types of meters, electricity meters, three-phase meters, electronic meter, electric meter

Types of meters, electricity meters, electric meters, three-phase meters, electric energy meter, electronic meter, electric meter, electric meters, n_k meter, characteristic meter, lichilniki

Type of electricity meter

Electrical energy meters

As settlement and technical (control) metering devices at enterprises (organizations), single- and three-phase current electric meters are mainly used in two types: induction and electronic (1-, 2- and multi-tariff), which are increasingly being used.

Induction three-phase active and reactive energy meters used as settlement meters must have an accuracy class of at least 2.5 (0.5; 1.0; 2.0 and 2.5) for active and at least 3 (1, 5; 2.0 and 3.0) for reactive energy.

An induction counter is a counter in which the magnetic field of stationary current-carrying coils affects a movable element made of conductive material. Usually this is a disk through which currents flow, induced by the magnetic field of the coils.

In accordance with GOST 6570-75, the meters are characterized by:

• counter constant C, i.e., the number of watt-seconds, watt-hours or kilowatt-hours per revolution of the device disk;
• gear ratio A, i.e., the number of revolutions of the disk that it must make in order for the meter reading to change by 1 kWh;
• meter K coefficient, i.e. the number by which the meter readings must be multiplied to obtain the actual electricity consumption, kWh.

counter constant WITH can be calculated using the marking on its shield, according to the formulas given in the table.

Formulas for determining the counter constant C

One of the disadvantages of induction meters is that they have a self-propelled movement, which is the movement of the meter disc under the action of voltage applied to the voltage circuit clamps, in the absence of current in the shock circuit of the meter.

In accordance with GOST 6570-75, the meter disk should not make more than one full revolution in the absence of current in the series (current) circuit and at any voltage from 80 to 110% of the nominal.

Induction meters are repairable products that cannot be restored at the facility, which must have an average time to failure of at least:

• 25,000 h - for three-phase meters of accuracy class 0.5;
• 33 300 h - for single-phase meters class. 2.0; for three-phase active energy meters class. 1.0 and class. 2.0;
• 37 500 h - for single-phase meters class. 2.5 and three-phase reactive energy meters class. 1.5 and class. 2.0;
• 50 000 h - for single-phase meters class. 2.0 and three-phase reactive energy meters class. 3.0.

The average service life before the first overhaul should be at least:

• 30 years - for single-phase meters class. 2.0; for three-phase meters class. 2.0 and class. 3.0 at the request of the consumer;
• 27 years - for three-phase meters class. 2.0 and class. 3.0;
• 25 years - for single-phase meters class. 2.5;
• 22 years - for three-phase meters class. 0.5, cl. 1.0 and class. 1.5.

Induction meters can be used in three or four-wire networks, in networks with an isolated or solidly grounded neutral, which can be determined by the designation of the meter, namely:

• SA3 - three-phase direct connection or transformer three-wire active energy;
• SA4 - the same, four-wire;
• СР4 - three-phase direct connection or transformer three- and four-wire reactive energy;
• SA3U - three-phase transformer universal (with a secondary or mixed counting mechanism) three-wire active energy;
• SA4U - the same, four-wire;
• SR4U is a three-phase transformer universal (with a secondary or shifted mechanism) three- and four-wire reactive energy.

A transformer is a meter designed to be switched on through one or more measuring transformers.

Single- and three-phase electronic meters of the latest design are promising in terms of the sales market and electricity consumption, as a result of which they have increasingly begun to replace induction metering devices. These meters can be connected to the network directly or through instrument transformers.

In accordance with GOST 30207-94 for electronic (static) meters, a transformer meter is called a meter designed to be switched on through instrument transformers with predetermined transformation ratios. The meter reading in this case should correspond to the value of the energy that has passed through the primary circuit.

A transformer universal meter is a meter designed to be switched on through instrument transformers having any transformation ratios. To determine the energy that has passed through the primary circuit, it is necessary to multiply the meter readings by the product of the transformation ratios.

The main advantage of electronic meters is a differentiated electricity metering tariff (one-, two- or more tariffs), which is provided using an external tariff switching device (for example, UPT 12-100 in an electric meter of the SET4-2 type). The load capacity of such a tariff switching device is from 1 to 30 meters.

A multi-tariff meter is an electric energy meter equipped with a set of counting mechanisms, each of which operates at set time intervals corresponding to different tariffs.

An electronic meter can be used as an incremental sensor for electricity consumption for remote information-measuring systems and systems for accounting and distribution of electricity.

In accordance with GOST 30207-94, electronic type meters have a standardized name - a static meter, i.e. a meter in which current and voltage act on solid-state (electronic) elements to create pulses at the output, the number of which is proportional to the measured active energy. In this standard, electronic meters are specified in accordance with their designation of accuracy classes, i.e. 1 and 2.

The constant of a static (electronic) meter is a value that expresses the relationship between the energy taken into account by the meter and the number of pulses on the test stand.

The meter constant is expressed either in pulses per kilowatt-hour [imp/(kWh)] or in watt-hours per pulse [(Wh)/imp].

The tables below show the standard (according to GOST 30207-94) values ​​of rated voltages and currents, i.e. those values ​​that are initial when setting requirements for meters.

Standard rated voltages

Standard values ​​of rated currents

The maximum current for direct-on meters, i.e. the highest current value at which the meter satisfies the accuracy requirements established in GOST 30207-94, is preferably an integer multiple of the rated current (for example, 4 times the rated current).

If the meter is powered by a current transformer(s), the current range of the meter must be matched to the secondary current range of the current transformer(s). The maximum current in this case is 1.2I nom; 1.5I nom or 2I nom.

The meter terminals must ensure the connection of up to two copper or aluminum wires with a total cross section of up to 5 mm. All terminals intended for connection to measuring voltage transformers must be separate and have holes with a diameter of at least 4.2 mm.

The terminals of three-phase meters intended for connection with current transformers must provide separate switching on of voltage and current circuits; the diameter of the terminal holes for these circuits must be at least 3.5 mm.

The average service life before the first overhaul and the mean time to failure for static meters are approximately the same as for induction meters. For example, for an electronic meter of direct connection of the SET4-1 (5-60) A type, these values ​​are 24 years and 55,000 hours, respectively.

On the, A as an example, a diagram of the direct connection of a SET-type meter to a four-pass three-phase network is given. In single-rate counters of the SET4-1 type, the control circuit for the state of counting mechanisms (tariff switching circuit) is not used and terminal 14 in the diagram, A not installed.

The output stages of the main and verification outputs of the meter are implemented on transistors with "open" collectors.

The output devices of electronic meters include:

• test output - a device that can be used to test the meter;
• functioning indicator - a device that issues a visually observable signal of the functioning of the meter;
• storage device - an element designed to store digital information;
• non-volatile storage device - a storage device that can retain information when the power supply is turned off.

To ensure the functioning of the output stages, it is necessary to apply voltage according to the scheme, b to terminals 2 and 13

Scheme of direct connection of the SET type meter to a four-wire three-phase network: A - connection diagram; b - connection diagram of the tariff switching device to the main output meter (transmitting device) and terminals 1 and 13 of the verification output.

Unlike induction electronic meters, they have a light indication on the shield, namely:

• NETWORK indicator, signaling that the meter is connected to the network (when the voltage of the meter of phase voltages of 220 V is applied to the circuit, the NETWORK indicator must be constantly lit);
• indicators A and B, signaling the inclusion of the load, which should flash at a frequency proportional to the power of the consumer in the loads (in the absence of load current, the indicators A And IN are in an arbitrary state, i.e., they may or may not glow);
• indicator TARIFF II (night-time tariff) at a two-tariff meter, signaling the presence on terminals 13 and 14 control signal counter, which should transfer the counting mechanism of the second tariff (TARIFF II) to the "active" state, and the counting mechanism of the first tariff - to the "passive" state.

Electricity consumption is taken into account directly in kilowatt-hours according to six digits of the drums located in the shield window.

The table shows the technical characteristics of three-phase electronic meters, serially produced by OAO Mytishchi Electrotechnical Plant (No. 1-8) and ABB VEI Metronika, Moscow (No. 9-12).

The appendix shows the marking of electronic meter shields (according to GOST 30207-94).

Three-phase electronic meters

At enterprises (in organizations), it often becomes necessary to determine the connected power (load) at different periods of the day, as a rule, during the hours of maximum or minimum loads of the power system. Unfortunately, in these cases, sometimes the electrical personnel of enterprises (organizations) experience certain difficulties, to the extent that they use electrical clamps for this purpose, followed by power calculation, despite the fact that the power supply contract states that for this purpose it is necessary to use an active meter. energy.

Load measurement can be carried out using an active energy meter and a stopwatch as follows.

At the moment when a fixed line appears on the counter disk, the stopwatch should be turned on, and after a certain number n of full revolutions of the counter disk, the stopwatch should be stopped. Then, depending on the values ​​of the meter constant C and its gear ratio A, the power is calculated according to the formulas shown in the table below.

Formulas for calculating power by meter using a stopwatch

Note. Table t- time shown by the stopwatch, s.

Example. At the enterprise, two feeders are equipped with settlement metering devices powered by transformers:

1st feeder. 630 kV-A transformer with measuring CTs 100/5 A and VT 10 000/100 V. A transformer meter is installed, calibrated for CT 75/5 A and VT 6000/100 V, on the label of which 1 kWh = 25 revolutions is indicated disk.

2nd feeder. 400 kV-A transformer with measuring CTs 50/5 A and VT 6000/100 V. A universal meter is installed, on the label of which it is written 3 × 5 A 6000/100 V, 1 disc revolution = = 10 Wh.

Determine the load for each feeder and the total load of the enterprise.

• Measuring time with a stopwatch t full revolutions n disk of the 1st counter. Let's assume that the measurements showed: t= 5 s at n= 6 complete revolutions of the disk.
• Since the meter is a transformer connected to measuring CTs and VTs with other values ​​of the transformation ratios, it is necessary to determine the recalculation coefficient K pr, which will be equal to the product of two ratios: the coefficients of the current transformers of the actually installed and the meter, and the coefficients of the voltage transformers of the actually installed and the meter, t e.

• Since 1 kWh \u003d 25 revolutions of the disk is indicated on the meter plate, then using formula (56) we determine the power shown by the meter:

• Taking into account the recalculation coefficient K pr, the actual power for the 1st feeder will be:

• We determine the power shown by the meter for the 2nd feeder, using formula (58) for our conditions of the problem:

where measured values ​​by stopwatch n= full rotation of the disk at t = 50 s.

• The actual load on the 2nd feeder, taking into account the coefficients of measuring CTs and VTs, will be:

• Thus, in this period of the day, the load of the enterprise on the 1st feeder is 384 kW, on the 2nd feeder - 216 kW, and the total load will be equal to: ΣР = P l +P 2 = 384 + 216 = 600 kW

The correct calculation of power (load) and the ability to use the calculated coefficients of metering devices (electric meters and instrument transformers) will not allow overpayment for consumed electricity and will ensure reliable control over the contractual values ​​of the connected power.

In accordance with the requirements of the PTEEP, monitoring of the operation of electrical energy metering devices at electrical substations (in switchgears) must be carried out by operational or operational and repair personnel.

Responsibility for the safety and cleanliness of measuring instruments and metering of electrical energy lies with the personnel servicing the equipment on which they are installed.

The installation and replacement of measuring current and voltage transformers, to the secondary circuits of which settlement meters are connected, is carried out by the personnel of the consumer operating it with the permission of the energy supply organization.

The replacement and verification of settlement meters, for which settlements with the energy supply organization are carried out, are carried out by the owner of the metering devices in agreement with the energy supply organization.

The personnel of the power facility, in accordance with the requirements of the PTEEP, are responsible for the safety of the settlement meter, its seals and for the compliance of the electricity metering circuits with the established requirements. Breaking the seal on the settlement meter, if it is not caused by force majeure, invalidates the electricity metering carried out by this settlement meter.

To protect against unauthorized access to electrical measuring instruments, switching devices and detachable connections of electrical circuits, they must be marked in metering circuits with special signs of visual control in accordance with established requirements.

In the era of market relations, increased attention has been paid to the issues of accounting for the consumption of electrical energy in the era of market relations, since the reliability and accuracy of information on the generation and consumption of electricity solves a whole range of pressing problems in the electric power industry, including energy saving, reducing payment for consumed electricity, choosing rational modes of operation of electrical installations, reliability of determination of electricity losses in networks and other important issues.

Electrical energy meters, Electricity management, Electricity management

Type of electricity metering device Electrical energy metering devices Enterprises (organizations) use

Control over the consumption of electrical energy is necessary both in industrial and domestic conditions. It helps to organize the correct operation of the network, and in some cases to identify problems and failures. For these purposes, special equipment is used - electricity meters (also called meters). Devices have a different principle of operation, which depends on the design features.

Types of electricity meters

The classification of electrical energy meters is carried out depending on the following parameters:

• connection type;
• measured value;
• design features.

Let's consider each of the points separately. According to the type of connection, the meters are divided into two main types:

• devices with direct connection to the power circuit;
• meters connected to the power circuit by means of instrument transformers (the so-called "transformer connection").

The first type of devices is designed for household metering, while transformers are needed for large buildings and enterprises that consume high current (more than 100 amperes).

Depending on the measured value, electricity meters are divided into the following types:

• single-phase (for current 220V with a frequency of 50Hz);
• three-phase (for current 380V with a frequency of 50Hz).

It is worth noting that modern three-phase meters with an electronic design are also capable of producing single-phase metering.

Depending on the design features, there are three groups of devices for metering electrical energy:

• Induction (electromechanical electric meters). Devices whose operation is based on the action of an electromagnetic field. The fixed conductors in the form of coils, through which the current passes, create magnetic impulses. They set in motion a special mechanism, which is a movable rotating disk. The amount of electrical energy consumed in induction devices is calculated from the number of revolutions of this disk.
• Electronic (static electricity meters). The principle of operation of these devices is as follows: a solid-state measuring element converts the incoming analog signals of alternating current and voltage into counting pulses, the number of which indicates the value of the measured active energy. The counting mechanism has an electromechanical or electronic type of design and, in addition to the measuring element, includes a device for storing the obtained values ​​and a display for displaying the results.
• hybrid devices. Models of this group represent an intermediate option. They are equipped with a digital interface, but measurements are made using the electromechanical method. Currently, these devices are not common, as they are inferior to electronic electricity meters in price and functionality.

The catalog of the MosEnergoSbyt online store contains a wide selection of single- and three-phase electronic meters from manufacturers such as Mercury, NEVA, Matrix and others. A complete list of devices can be found on the company's website.

Main parameters of electric meters

The main parameters of electrical energy meters include:

• Accuracy class. Specification showing the maximum possible measurement error. Until 1996, inclusive, all measuring instruments that were equipped with residential premises had an accuracy class of 2.5 (in other words, the measurement error was 2.5%). In the online store "MosEnergoSbyt" you can find electricity meters that meet the modern standard in the domestic sector (with a deviation of no more than 2%).
• Intertest interval. In the process of continuous operation, individual elements of the device naturally wear out and cease to perform their functions correctly. As a result, the accuracy class of the measuring device inevitably decreases. Therefore, devices must be periodically checked for accuracy. The time interval from the moment of the initial verification (during production) to the next one is called the verification interval (abbreviated MPI). This characteristic is calculated in years and indicated in the passport of the measuring device.
• "Tariff". This parameter determines the ability of the electric meter to measure according to various tariffs (or modes). All electricity metering devices based on the induction method of calculation operate at only one tariff. Unlike them, electronic meters are capable of operating on two (the so-called "day / night" mode) or more tariffs (for example, take separate readings for the seasons or days of the week).

A very important indicator of saving money at home is the reduction in the cost of paying for electrical energy. In the modern world, household appliances have high power, which will certainly “hit your pocket” when a monthly receipt “for light” arrives. Next, we will consider which electricity meter is better to choose and buy for an apartment or a private house so that monthly receipts are less and less!

Variety of devices

To begin with, we will briefly understand what electric meters are, after which we will find out which one is needed for a house, apartment and cottage.

So, today there are the following types of metering devices:

1. Induction (mechanical) and electronic. The first are classics of the genre and are still used in buildings of the old type. The advantage of induction electricity meters is durability, reliability and low price. At the same time, the main disadvantage is the low accuracy class, as a result of which you can either overpay extra money or underpay. In turn, electronic metering devices are multifunctional, they can be designed for several tariffs and, moreover, they are better because they take up less space on the input shield. As you understand, the disadvantage is the higher cost and shorter service life, which discourages buyers. You need to choose the type of counter based on your material capabilities. We talked about how one and the other option works in the article:.
2. Single-tariff and multi-tariff. There has already been a whole discussion among the owners of meters for two / three tariffs and ordinary single-rate metering devices. We have already considered where we provided both negative and positive customer reviews. We repeat once again that the rationality of choosing an electric meter for several tariffs depends on the region of residence and on what household appliances you use more often. If you have a night rhythm of life, it is better to choose and buy a multi-tariff meter for your house and apartment.
   
3. Single phase or three phase. Everything is simple here and the choice of the meter depends on the type of power supply to your house or apartment) - single-phase or three-phase.
   
   
4. . This characteristic shows the percentage error of the electricity meter when accounting for electricity consumption. Today, it is necessary to use devices with an accuracy class of at least 2.0 (according to Decree of the Government of the Russian Federation of 05/04/2012 N 442 (as amended on 06/22/2019), see the Rules for Organizing Electricity Metering in Retail Markets. p. 138 ). The more accurate the accounting, the less likely it is to be deceived when paying for electricity.
5. Power.Another equally important characteristic that must be considered when choosing an electricity meter is the total electrical load (power). The electrical products market offers direct connection meters in the current load range from 5 to 100A. We talked about that in a separate article.
   
6. Mounting method. The housing can be mounted either on or bolts.
   
7. Application conditions. There are devices designed for use only in heated rooms, and there are outdoor models. The meters must be operated under the conditions specified in the passport of the meter.

A short video review on choosing an electric meter for a house and an apartment:

Expert advice

Which option to prefer

So, we have provided the types of electric grids, now let's talk about which one is better to choose and buy for a house, apartment, garage and cottage.

Firstly, rely on power metering devices. In order to choose the right electricity meter for power, or rather current, you need to calculate what electrical appliances you will use. For modern household appliances, the nominal values ​​\u200b\u200bare indicated in the passport (in kW). Sum them up and take into account the margin (suddenly you will buy something else), on the basis of which you will decide on the choice of a certain characteristic. If the total is no more than 10 kW, buy a 60 A model, which will be quite enough. If the average daily power consumption is over 10 kW, it is better to choose an electricity meter for 100 A. Usually, 60A is enough for a house and apartment.

Secondly , select device type- mechanics or electronics, one tariff, two or three. Here, again, only you are your own adviser, because Everyone has their own preferences and material possibilities. If at this stage there are difficulties, consult with our specialists in the category "". We recommend choosing only one-tariff electricity meters for summer cottages, because. once a week (or even a month) is not correct, given that the rest of the time you will overpay for the daily rate.

Third, choose the right attachment type. Here we recommend choosing a model that is mounted on a DIN rail, because. it is universal - when buying an adapter plate, you can fix the case on the wall too.

Well, the last thing to say - manufacturer. High-quality electricity meters are produced by domestic firms, such as Incotex (the popular model Mercury), Energomera Concern, Leningrad Electromechanical Plant and the Moscow Plant of Electrical Measuring Instruments. Elster Group, ABB and General Electric are popular among foreign firms. As for which electricity meter is better to choose by manufacturer, here we recommend actively reviewing reviews of various models on the forums. The best assessment of quality can only be given by those who have already used one or another model.

Rating of the best electric meters in 2019

In 2019, according to customer reviews and companies that sell electricity meters, the following models are the best today:

• single-phase, single-tariff: Energomera CE101 R5, Neva 103/5 1s0, ABB FBU11200, Mercury 201.8, ;
• single-phase, multi-tariff: Energomera CE 102 MR5, Neva MT 114, ABB FBВ 11205-108, Mercury 200.2;
• three-phase, single-tariff: Energomera SE300, Neva 303-306, Neva MT 324, Mercury 231 AM-01;
• three-phase, multi-tariff: Energomera CE301, Mercury 231 AT-01.

And finally, I would like to tell you how to choose the right electricity meter. Adhering to the following recommendations, you will definitely be able to choose and buy the most suitable model:

1. For a garage, get a more powerful metering device, because. very powerful equipment can be used here, and several types at the same time: a welding machine, a compressor, etc.
2. Check the date of verification of the meter (indicated in the attached passport), as well as the presence of seals on the case. The state verification date must be no more than two years old for single-phase devices and no more than a year for a 3-phase electric meter.
3. Do not listen if you are told to overpay and buy a device with automated expense accounting. For you, such a function will not change anything for the better, because. it only helps the utilities keep track of readings while you have to pay the extra money.
4. Russian manufacturers produce no less high-quality products than foreign ones. Take a good look at domestic models, read reviews on thematic forums and choose a cheaper, but still reliable option for an electricity meter.
5. Also read on the Internet about how expensive it is to repair the electricity meter you have chosen, because. sometimes service prices are simply astronomical in relation to a particular firm.
6. A small but very important nuance - before buying, ask about the noise level of the electric meter so that after installation you will not be upset in an unpleasantly buzzing device.
7. Electronic devices have a longer calibration period than induction ones. You can learn more about that from our article.
8. Mechanical equipment can be “rewound”, unlike modern electronic equipment. This, of course, is prohibited by law, but nevertheless Our people do not stop.
9. If you still decide to choose a mechanical electricity meter, check it before buying. This is done as follows: scroll the disk by hand and if it rotates by inertia, then the move is normal and the mechanism is suitable for work. Any violation of the course indicates that the wheel is not in working order.

Here we have provided all the basic tips for choosing an electricity meter, as well as a rating of the best electricity meters for 2019. We hope that now you know which option is better to choose and buy for your conditions!