How to connect a single-phase electricity meter Mercury 201. How to connect an electricity meter: step-by-step instructions

Counter electrical energy"Mercury - 201" is currently the most popular metering device in our country. Counters of this model successfully replace older models with a rotating disk.

In this article we will talk about what features and characteristics this metering device has, as well as how it is connected.

Features and technical characteristics of the meter

These metering devices have been produced by the domestic company Incotex since 2001. This manufacturer has established itself as a high-quality one, producing both single-phase meters for domestic needs and complex three-phase structures.

This device has several modifications from 201.1 to 201.8. And also all units from this series can be divided into types depending on the permissible operating current and the method of displaying information about electricity consumption.

The Mercury 201 meter is a rectangular plastic case with an LCD display on the front with information about energy consumption. Right on front side located Technical information in the form of a table. The device body is compact in size.

The lower part of the meter housing is removed and provides access to the device contacts. All wires are connected using a screw connection. To fix the meter on a vertical surface, you must use a DIN rail, which is equipped with almost all modern metering devices.

Depending on the configuration, these meters can be electromechanical, where a special drum is a reading device, or electronic, where all readings are displayed.

Thanks to polarity reversal, all meters in this series are protected from theft of electrical energy. It also has the following characteristics:

  1. Certain indicators operating temperature, which are between -20 and +55 degrees.
  2. The product is guaranteed for 3 years from the date of purchase.
  3. The maximum service life of the meter is 30 years after installation.
  4. The calibration interval is 15 years.

Requirements for the meter

Before purchasing an electric meter, you need to check whether it meets all necessary requirements. This includes the presence of an accuracy class, usually for electricity metering devices this is the first or second class, which allows a measurement error of 1-2%.

It is also worth checking in advance whether the date of production and verification of the meter is indicated. It is imperative to check the number for availability in the State Register database of measuring instruments and the warranty seal on the device itself. And it’s worth making sure that you have the verifier’s mark and a protective hologram.

Connecting the meter

Before installing the meter, the following details are agreed upon with the energy supply company:

  • Installation location. This is usually done outside the apartment or house, but installation can also be done inside.
  • Model of the installed meter. Here you will need technical documents, which are received upon purchase.
  • Checking the quality of the electrical connection and wiring diagram.

Before connecting the meter, you must study as carefully as possible technical certificate to the product, and also clarify its connection diagram. If the master is unsure of his abilities, then it is necessary to use the services of professionals. Very often, many questions arise regarding how to connect the Mercury-201 meter, but in fact there are no particular difficulties in this process.

A single-phase device is designed to include the following input contacts:

  1. Contact for entering a phase into the room from an external network. The wire is obtained from the electricity supplier.
  2. The ShVVP cable is intended for phase output into the connected room.
  3. Terminal for connecting zero from the general network.
  4. Zero output terminal to load inside.

All wires are connected in the specified sequence.

Important! Before starting work, the system is de-energized. To do this, turn off the switch, the machine, the plugs and the cable itself if it goes to the meter.

The connected wires are neatly arranged on the terminal cover using perforated cells. The cover itself is mounted on the body as tightly as possible.

After this, you need to once again make sure that the connection diagram has been followed and call a representative of the electric company, who will carry out verification and install the appropriate seal on the meter.

Important! If the red light on the electric meter is on, this means it is connected to electrical network.

The single-phase Mercury 201 electric meter has become widespread among users, replacing already outdated electricity metering devices equipped with a rotating disk. Those who lived through the Soviet era must remember them. The article discusses the characteristics of this device, price, principles of its operation, installation of the Mercury 201 electric meter.

Features and Specifications

The electronic electricity meter Mercury 201 is used for electricity metering in networks with a voltage of 220 V. The metering type is single-tariff. It is used equally successfully in the residential and commercial sectors.

The Mercury 201 electricity meter has the following features:

  • small size - Mercury 201 is a compact counter with a modern design;
  • a security system that prevents any attempts to steal electricity;
  • use as a shunt current sensor;
  • The mounting is performed on a din-rail, however, the client can order a plate designed for mounting ind. electricity meters; therefore, there are several ways to install the Mercury 201 electric meter;
  • a PLC modem inherent in some modifications, which quickly records all changes in the state of the device.

The characteristics of the Mercury 201 electricity meter are as follows:

  • nom. current - 60 and 80, voltage - 220 V;
  • the estimated service life of the meter is 30 years;
  • The warranty covers the first 3 years of operation;
  • the time after which it is necessary to check the Mercury 201 electronic electricity meter is 16 years (calibration interval).

Successful operation of the device is possible in following conditions. The Mercury 201 5 electricity meter must be mounted on a DIN rail in places reliably protected from influence atmospheric precipitation and mechanical damage.

Temperature range of use is from +40 to -55 degrees Celsius.

When starting operation, you should make sure that the characteristics of the device meet the following requirements for the accuracy class, indicating the error permissible for the metering device. This indicator cannot be more than two; for this device it is equal to one. The user can verify this by looking at the passport of the Mercury 201 electric meter.

The kit includes:

  • the device itself,
  • instruction Mercury 201 5;
  • adapter plate (however, since 2015 it is not included in the package).

Now about the price issue. How much does the Mercury 201 electric meter cost? The answer to this question depends on the modification of the model, which can be read below. Cost of the Mercury 201 counter simple models is up to 100 rubles, but there are also more expensive models. In general, the prices for the device can be classified as affordable.

Modifications of the meter, its structure

The watershed is drawn between meter models, which are:

  • electromechanical (these modifications are distinguished by the presence of a rotating drum);
  • electronic - they work on the basis of circuits, have a liquid crystal display on which all data is displayed.

Photos of Mercury 201 with various modifications can be seen on the website. There are modifications depending on the maximum current of 60 or 80 amperes, the number of transmitted pulses, etc.

The Mercury electricity meter device is supplemented with a seal on which the date of manufacture of the device is marked.

There is also a stamp from the state verifier, confirming that the device meets all the required parameters. If one of the elements has been broken, the user needs to contact the energy supplier. The same applies if Mercury 201 does not work.

Installation Rules

The main issue is connection. How to install Mercury 201? To do this, you need to know that the device on the terminal block has 4 input contacts:

  • contact for phase input,
  • contact for phase output,
  • terminal designed to connect “0” from the external network,
  • output terminal “0” indoors.

The connection must be made in the same sequence. The manufacturer of Mercury 201 has placed a diagram of the device on the meter, which helps you navigate during installation. All wires are laid carefully; there are cells on the cover specifically for this purpose. Then the lid is screwed tightly.

This is how the Mercury 201 5 meter is installed. After this, the device is sealed by specialists and connected to the network. If everything is in order and the installation of Mercury 201 was successful, the red indicator will light up.

Hello, dear readers, today our topic of the day is the Mercury 201 electric meter. This is a single-phase, single-tariff meter. It is very common in the household segment, as it attracts with its inexpensive price.


The digit capacity of the reading mechanism is 6 characters. The varieties of this meter are as follows: 201.2,4,5,6,22 and recent new products 201.7,8 - this is a multi-tariff version of the meter. The accuracy class of the device corresponds to state standards and is equal to 1. The calibration interval of this electricity meter is 16 years. The service life of the device is 30 years. The manufacturer provides a 3-year warranty on this meter model.

Taking readings on a mechanical reading mechanism (single tariff)


Single-tariff meter models with mechanical or electronic display:
201.2; 201.4; 201.5; 201.6; 201.22 and 201.7; 201.8

To take readings from the Mercury 201 of these models, it is enough to rewrite all the numbers before the decimal point or before the digit highlighted by the frame, the digit after the decimal point is a fraction of a kilowatt/hour; they do not need to be taken into account when taking readings.

All Mercury 201 models have a comma or a number highlighted with a frame, so there shouldn’t be any difficulties. On meters where an electronic counting mechanism is installed, a dot is displayed instead of a comma.

Taking readings on an electronic reading mechanism (multi-tariff) 201.8 TLO

The multi-tariff version of Mercury 201 includes 201.8 TLO - this is a multi-tariff meter for metering electricity according to the day/night plan, also if there are more than 2 tariffs, then peak, half-peak.

This counter has an automatic mode for displaying information on the display with a short interval of 4 seconds.
What information will be displayed is configured through the configurator program when programming the meter. If the cyclic display is not turned off, the information on the display will change; if it is turned off, we will see the readings at the current tariff.

Power and consumption of LED lamps

To take readings from the meter, we will need the following indicators:
The total number of kilowatt/hour for all tariffs (if we pay according to a single tariff plan)
Number of kilowatts at 1 tariff
Number of kilowatts at tariff 2

To do this, wait until the display shows numeric value with the [Tariff 1] icon on the left top corner and [kWh] in the lower right corner. This is the current value of the total electricity consumption at tariff 1. We write the number from left to right to the point.

Next, we need to record the meter readings at tariff 2. To do this, wait until the meter cyclically displays a numerical value with the [Tariff 2] icon in the upper left corner and [kWh] in the lower right corner. We write down this value.

To calculate the amount total amount to pay
1) The number of kilowatts at tariff 1 is multiplied by the price for 1 kilowatt/hour according to your tariff.
2) The number of kilowatts at tariff 2 is multiplied by the price for 1 kilowatt/hour at tariff 2
3) Add up the resulting values.

To calculate the number of kilowatts that were wound over the last (current month), you need to subtract the meter readings at the same tariffs that were a month ago from the current indicators for tariffs, then proceed to calculating the amount to be paid in 3 steps as shown above.

If you pay according to a single tariff plan, then you only need to rewrite the value of the total consumption of kilowatts for all tariffs. To do this, wait on the display for a number with icons [Tariff 1 2 3 4][kWh]

15.04.2018

The single-phase Mercury 201 electric meter has become widespread among users, replacing already outdated electricity metering devices equipped with a rotating disk. Those who lived through the Soviet era must remember them. The article discusses the characteristics of this device, price, principles of its operation, installation of the Mercury 201 electric meter.

Features and Specifications

The electronic electricity meter Mercury 201 is used for electricity metering in networks with a voltage of 220 V. The metering type is single-tariff. It is used equally successfully in the residential and commercial sectors.

The Mercury 201 electricity meter has the following features:

  • small size - Mercury 201 is a compact counter with a modern design;
  • a security system that prevents any attempts to steal electricity;
  • use as a shunt current sensor;
  • The mounting is performed on a din-rail, however, the client can order a plate designed for mounting ind. electricity meters; therefore, there are several ways to install the Mercury 201 electric meter;
  • a PLC modem inherent in some modifications, which quickly records all changes in the state of the device.

The characteristics of the Mercury 201 electricity meter are as follows:

  • nom. current - 60 and 80, voltage - 220 V;
  • the estimated service life of the meter is 30 years;
  • The warranty covers the first 3 years of operation;
  • the time after which it is necessary to check the Mercury 201 electronic electricity meter is 16 years (calibration interval).

Successful operation of the device is possible under the following conditions. The Mercury 201 5 electricity meter must be mounted on a DIN rail in places reliably protected from precipitation and mechanical damage.

Temperature range of use is from +40 to -55 degrees Celsius.

When starting operation, you should make sure that the characteristics of the device meet the following requirements for the accuracy class, indicating the error permissible for the metering device. This indicator cannot be more than two; for this device it is equal to one. The user can verify this by looking at the passport of the Mercury 201 electric meter.

The kit includes:

  • the device itself,
  • instruction Mercury 201 5;
  • adapter plate (however, since 2015 it is not included in the package).

Now about the price issue. How much does the Mercury 201 electric meter cost? The answer to this question depends on the modification of the model, which can be read below. The cost of a Mercury 201 counter for simple models is up to 100 rubles, but there are also more expensive models. In general, the prices for the device can be classified as affordable.


Modifications of the meter, its structure

The watershed is drawn between meter models, which are:

  • electromechanical (these modifications are distinguished by the presence of a rotating drum);
  • electronic - they work on the basis of circuits, have a liquid crystal display on which all data is displayed.

Photos of Mercury 201 with various modifications can be seen on the website. There are modifications depending on the maximum current of 60 or 80 amperes, the number of transmitted pulses, etc.

The Mercury electricity meter device is supplemented with a seal on which the date of manufacture of the device is marked.

There is also a stamp from the state verifier, confirming that the device meets all the required parameters. If one of the elements has been broken, the user needs to contact the energy supplier. The same applies if Mercury 201 does not work.


Installation Rules

The main issue is connection. How to install Mercury 201? To do this, you need to know that the device on the terminal block has 4 input contacts:

  • contact for phase input,
  • contact for phase output,
  • terminal designed to connect “0” from the external network,
  • output terminal “0” indoors.

The connection must be made in the same sequence. The manufacturer of Mercury 201 has placed a diagram of the device on the meter, which helps you navigate during installation. All wires are laid carefully; there are cells on the cover specifically for this purpose. Then the lid is screwed tightly.

This is how the Mercury 201 5 meter is installed. After this, the device is sealed by specialists and connected to the network. If everything is in order and the installation of Mercury 201 was successful, the red indicator will light up.

Is it possible to install not only an electric meter, but also all the wiring in the house with your own hands? Read. How to install a distribution board for electrical wiring? In this article.

It is not difficult to determine the indications. The numbers on the red field indicate ten parts of kW per hour, on the black - this is an integer value. As you can see, the Mercury 201 electricity meter is very easy to use. It also features accurate readings and other useful features.

The products of the Incotex company, today, are one of the most widespread in the domestic market. Electric meters from this company are distinguished by their availability, small size, and accuracy. One of the most popular electricity metering devices from Incotex is the Mercury meter and its modifications. Read the article about what operating characteristics the meter has and how to connect the meter.

Electric meter Mercury-201: principle of operation, characteristics

Counter Mercury 201 is electronic device metering of electrical energy consumption in alternating current networks, which is designed for an operating voltage of 220-230 V. The device can be used either separately or in conjunction with automated electricity metering systems.

The Mercury 201 meter registers and stores data on the amount of electricity consumed from the moment it is put into use according to one specified tariff.

The electromechanical device has a convenient liquid crystal display, a narrowband PLC modem module for transmitting information via power network. The signal transmission speed in the meter is about 7.5 kbit/s. Summarizing all the indicators, the device displays them in kilowatt-hours.

The main advantages of Mercury-201 include:

  • High level of accuracy. The device has the first accuracy class out of two acceptable.
  • Small dimensions. The device has the following dimensions: 10.5x10.5x6.4 cm, and its weight does not exceed 250 grams.
  • Reliability. The device is resistant to short-term current overloads exceeding the maximum value by 30 times. At the same time, deviations in the device readings are 1-1.5%.
  • Low power consumption. The total power consumed by the meter is 1.5 W.
  • Durability. The average service life of the meter is 30 years.

The device comes complete with a protective box, passport, instruction manual, and warranty. A manual for medium repairs is available upon request. The warranty period for each device is 36 months from the date of commissioning of the device.

Mercury-201: connection diagram

The electronic device Mercury 201 keeps track of electricity “modulo”. This means that a connection with reverse current polarity does not affect the meter readings. So, when connecting a single-phase meter, you can swap the phase input and output, connect the phase to the neutral terminal, and the neutral to the phase terminal. However, the manufacturer recommends connecting the electric meter according to the diagram. The meter connection diagram is quite simple.

So, single phase Mercury has four terminals for wires:

  • The first terminal is responsible for introducing the phase into the home;
  • The second is for phase output to electrical installations;
  • The neutral working wire from the external network is connected through the third terminal;
  • Zero output to electrical installations is realized through the fourth terminal.

To connect the contacts to the terminals, you need to remove the protective cover from the terminal block and unscrew the fastening screws in the wire cells. After that, the stripped, flat section of the wire corresponding to the terminal must be inserted evenly into the contact clamp. The screws that secure the wire can be tightened using a Phillips screwdriver. Fixation should begin with the top screw. Connect the other wires in the same way, and then replace the protective cover.

It is necessary to supply a phase to the machines from the meter, and a phase and zero to the RCD. In this case, bypassing the machines, it is necessary to lay neutral working and protective contacts to the electrical installations connected to them. Grounding must also be carried out to the electrical installation operating through an RCD. Contacts from machines can be output to lighting and sockets, as well as household appliances. Powerful household appliances (for example, washing machine, boiler) are usually connected to the RCD. Using the same principle, connect the electric single-phase meter “Aist” from RUE “Gomelenergo”.

How to twist the Mercury-201 electricity meter

In order to save money, some residents prefer to twist the meter readings. It should be noted that such actions are illegal. If a violation is detected, residents will be issued a fine and their electricity consumption will be recalculated according to standard tariffs. If you fail to pay the fine and debt, related services may prohibit you from leaving the country and seize your bank account, collect the debt from your wages or confiscate property to pay off a debt. However, there are many schemes online that can reduce the meter reading. But such manipulations can not only damage the meter, but also cause a fire.

Today, the most effective method for twisting electric meter readings is to purchase a circuit with a special control panel.

Such a remote control controls a circuit that is installed in the meter housing. When you press a button on the remote control, the counter begins to rewind the readings. At the same time, the longer the button is pressed, the more kW can be rewinded. On average, such a device can rewind from 10 to 12 kW per second. At the same time, the weight of the modified meter differs from the standard one by only 2.2 grams.

Technical characteristics: Mercury-201.5

Mercury 201.5 is a modification of the single-phase meter 201, which has similar technical characteristics. It also works in single-phase networks, has four terminals and first class accuracy. At the same time, the weight of the modification is 100 grams more than the usual Mercury, and its width is several mm.

The main difference between the meters lies in the fact that the modification has an electromechanical meter reading device.

Thus, information about the amount of electricity consumed is displayed using digital disks. In the fifth modification of Mercury there are six such disks. Indications are often compared against the last three.

How to deceive the Mercury-201.5 electricity meter: diagram

It can be quite difficult to rewind meter readings with your own hands using special radio circuits. If such circuits are connected incorrectly, the meter may need to be repaired. In addition, it can cost not only a fine, but also health. Therefore, cunning people have come up with several ways to “deceive” the Mercury counter of the 201.5 series.

So, you can stop or slow down an electromechanical meter using:

  • Neodymium magnets. One such magnet is installed on the counter, next to the disk, slowing down its speed. However, if the meter has a special magnetic tape, then this method will not work.
  • Needles. To do this, you need to make a hole in the meter body through which, towards the disk, insert a needle or pin - an object that will delay the movement of the disk. This method is only suitable for a disk counter. On Mercury 200, installing a needle will be useless.
  • Transformer. Today, many companies produce special transformers that slow down or stop the meter (depending on their power). But, such devices can negatively affect all electronics in the house.
  • Special device. Some devices connect to the meter, creating malfunctions in its operation, blocking the rotation of the disk. Such devices do not affect the electrical wiring itself.

In addition, today, most electricians provide services for stopping, slowing down or twisting meters.

How to connect the Mercury-201 meter (video)

Electric meters Mercury of the first series, today, are the most common. Meters have many advantages, including their availability and ease of connection. You can connect the metering device correctly by following the above tips and step-by-step instructions. In addition, you can try to “deceive” the meter by twisting the readings or stopping it. But remember that such activities are illegal and, if discovered, can lead to severe administrative penalties.

Single-phase electricity meters Mercury 201 are the most common means of energy accounting today. They replaced the old, morally and technologically outdated counters with a rotating disk.

If you decide to buy a Mercury meter and connect it yourself, this information may be useful to you.

Mercury meters are produced Russian company Incotex since 2001. The manufacturer guarantees the quality and reliable operation of the device for up to 30 years.

Basic requirements for Mercury 201 meters

When purchasing a Mercury meter (series 201), you must check compliance with the basic requirements specified in the documentation:

  • accuracy class – (can be 1 or 2). This parameter indicates the permissible measurement error (1 or 2%);
  • date of manufacture of the meter (this is also the date of verification of the device);
  • number of registration of the energy metering device (Mercury 201) in the State Register of Measuring Instruments.

Check for the presence of a warranty seal (with the date of manufacture of the meter), a stamp of the state verifier (with the date of verification), and a hologram (protection against counterfeiting).

Design features of meters

Depending on the modification, Mercury 201 meters can be:

  • electromechanical. The counting device is a mechanical drum. (Mercury 201.5, 201.6, 201.7).
  • Electronic. The reading device operates on the basis electronic circuits. (Mercury 201.2, 201.4, 201.8). The results of electricity metering are displayed on a liquid crystal display.


Before installing and connecting the electric meter, you need to carefully read the operating instructions, the device data sheet, and study the direct connection diagram.

The single-phase meter on the terminal block contains 4 input contacts:

  1. Contact for entering a phase from an external network (220V) into an apartment or house. The input wire comes from the power supply company.
  2. Contact for phase exit inside an apartment or house. For the output, you can use a ShVVP type wire.
  3. Terminal for connecting zero from an external network to an apartment or house.
  4. The zero output terminal is further towards the load, that is, inside the apartment or house.

Connecting the wires should be done in the same sequence.

Important to remember! Before connecting the meter, it is necessary to de-energize the system by turning off the machine, plugs, switch (if they are installed between the main trunk line and the meter). If the input cable goes directly to the meter, disconnect the supply line.

The connected wires are neatly laid out; for this purpose, the terminal cover has perforated cells for breaking out. The cover is screwed to fit tightly to the meter body.

You should check the connection diagram again and install the cover. Then, a representative of the network organization that provides electricity supply and metering, The Mercury 201 meter is being sealed. There is a special hole in the meter for this purpose.

When the meter is connected to the mains, the red indicator light lights up.

To connect the Mercury 201 meter to the electrical network, you need to thoroughly study the documentation, be able to read electrical diagrams, and remember to strictly observe the phases and markings (colors) of the wires.

Also watch the video, which shows step-by-step instructions for installing and connecting a single-phase meter.


The Mercury 201 electricity meter is a modern device for commercial metering of active electrical energy in an alternating current circuit. Such devices are produced by the manufacturing company Incotex. There are several modifications in the 201 series (for example, 201.3 or 201.5), which have their own specifications. This division is carried out due to the permissible operating current and the way in which electrical energy consumption data is displayed. This device can be used either independently or in conjunction with automatic energy metering and information systems. Below we will look specifications Mercury 201 and connection diagram for this meter.

Features in design

By design, the Mercury 201 counter of any series has the same housing. This is a rectangular plastic case. This counter is screwless, making it maximally protected from break-ins, and the mechanism is quite sealed.

In the foreground (on the front panel) there is a liquid crystal (LCD) display, which displays necessary information according to electricity calculations. Near the LCD display (on the right side) the main technical characteristics are indicated.


The design dimensions are compact and convenient and are: 105 * 105 * 65 mm, where 105 is the width and height of the device, and 65 is its depth. On average, the weight of the device ranges from 250 to 350 grams, depending on the series. Due to this size and weight, the mechanism can be attached to a surface without modification of additional fasteners. The meter is attached to the wall (or to any other surface that the consumer chooses) using.

The bottom panel in the mechanism is removable. Its purpose is to protect the contacts of the device. That is, if you remove it, access to the input will be open electrical contacts devices. The connection itself to such contacts is carried out using a screw connection, as shown in the photo below:


Some basic technical characteristics make the meter more convenient to use. For example, the accuracy class has a technological margin, and thanks to the use of a shunt in the circuit, the direct current component can be accurately measured.

The figure below shows the overall dimensions (drawing) of the Mercury 201 device.

Basic and additional characteristics

Before you begin to study the technical characteristics of the device, it should be noted that the electric meter has special protection against the theft of electrical energy through polarity reversal. That is, if you change the phase to zero, the electric meter will still show accurate data and will not stop working.

The technical characteristics of the Mercury 201 meter differ depending on its modification. Descriptions of models from 201.1 to 201.6, their and other parameters are shown in the table below:


In addition to the basic values, the electric meter also has additional technical characteristics (such as temperature range, operating conditions, warranty period and service life). They are listed in the table below:


The main difference between the devices is that in some models the display of consumed electricity is shown on liquid crystal displays (indicators), and in some models there is a mechanical metering unit.

Also, some models have a PLC modem, with which you can record all changes in devices.

The Mercury 201 electricity meter has become very popular among residents of private houses and apartments. The reason for this is not only the technical characteristics, but also the affordable price. Due to the accuracy of measurements and reasonable price, the meter has gained recognition among electricity consumers.

The video below provides an overview of this meter model:

Connection diagram

The Mercury 201 meter is connected to the power supply, just like all similar structures for metering electrical energy. Only when connecting is the main thing considered the correct choice of conductor for the input and output. The input wire is determined automatically - it will be the same as determined by the manufacturer and power supply organization. For the output conductor, any wires are used (for example, ShVVP

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The electricity meter "Mercury - 201" is currently the most popular metering device in our country. Counters of this model successfully replace older models with a rotating disk.

In this article we will talk about what features and characteristics this metering device has, as well as how it is connected.

These metering devices have been produced by the domestic company Incotex since 2001. This manufacturer has established itself as a high-quality one, producing both single-phase meters for household needs and complex three-phase designs.

This device has several modifications from 201.1 to 201.8. And also all units from this series can be divided into types depending on the permissible operating current and the method of displaying information about electricity consumption.

The Mercury 201 meter is a rectangular plastic case with an LCD display on the front with information about energy consumption. On the right side of the front side there is technical information in the form of a table. The device body is compact in size.

The lower part of the meter housing is removed and provides access to the device contacts. All wires are connected using a screw connection. To fix the meter on a vertical surface, you must use a DIN rail, which is equipped with almost all modern metering devices.

Depending on the configuration, these meters can be electromechanical, where a special drum is a reading device, or electronic, where all readings are displayed. Thanks to polarity reversal, all meters in this series are protected from theft of electrical energy. It also has the following characteristics:

  • Certain operating temperature indicators, which are between -20 and +55 degrees.
  • The product is guaranteed for 3 years from the date of purchase.
  • The maximum service life of the meter is 30 years after installation.
  • The calibration interval is 15 years.

Requirements for the meter

Before purchasing an electric meter, you need to check whether it meets all the necessary requirements. This includes the presence of an accuracy class, usually for electricity metering devices this is the first or second class, which allows a measurement error of 1-2%.

It is also worth checking in advance whether the date of production and verification of the meter is indicated. It is imperative to check the number for availability in the State Register database of measuring instruments and the warranty seal on the device itself. And it’s worth making sure that you have the verifier’s mark and a protective hologram.

Connecting the meter

Before installing the meter, the following details are agreed upon with the energy supply company:

  • Installation location. This is usually done outside the apartment or house, but installation can also be done inside.
  • Model of the installed meter. Here you will need technical documents that were received upon purchase.
  • Checking the quality of the electrical connection and wiring diagram.

Before connecting the meter, you need to carefully study the technical data sheet for the product, and also clarify the connection diagram. If the master is unsure of his abilities, then it is necessary to use the services of professionals. Very often, many questions arise regarding how to connect the Mercury-201 meter, but in fact there are no particular difficulties in this process.

A single-phase device is designed to include the following input contacts:

  • Contact for entering a phase into the room from an external network. The wire is obtained from the electricity supplier.
  • The ShVVP cable is intended for phase output into the connected room.
  • Terminal for connecting zero from the general network.
  • Zero output terminal to load inside.

All wires are connected in the specified sequence. Before starting work, the system is de-energized. To do this, turn off the switch, the machine, the plugs and the cable itself if it goes to the meter. The connected wires are neatly arranged on the terminal cover using perforated cells. The cover itself is mounted on the body as tightly as possible.

After this, you need to once again make sure that the connection diagram has been followed and call a representative of the electric company, who will carry out verification and install the appropriate seal on the meter. If the red light on the electric meter is on, this means it is connected to the electrical network.