Meter Mercury 231 – modifications and review of the device

The Mercury 231 meter is a model of a three-phase device that determines the amount of electricity consumed both at one tariff and at several depending on the modification. The device is designed for use at individual energy consumption sites and provides the ability to operate in autonomous mode or connect to a centralized network to control consumption. Depending on the modification, readings are taken into account according to one or several tariffs.

Meter type – Mercury 231

Specifications

Technical characteristics of the Mercury 201 meter

Device service life

The electric meter has a standard service life of 30 years. During the first 36 months of operation, it is possible to replace the device or repair it under warranty if it turns out that there is a malfunction associated with a manufacturing defect. The warranty does not cover cases of abuse or incorrect connection. The warranty may extend up to 42 weeks from the date of manufacture if the device has not been connected for some time.

Calibration interval

When purchasing a device, you must make sure that there is a record in the passport documentation confirming the verification of the product at the factory after manufacture. After installation, verification must be carried out regularly with a verification interval of 16 years. The completion of this work is confirmed by the entry of the employee who checked the device in the product passport.

Meter cost

The meter has an affordable price. It can be purchased for 660 rubles or more if a larger price is set by the seller. The device is offered in specialized stores or ordered online.

Model range and markings

Metering devices manufactured by Incotex are available in the following modifications:

• 100 is a model range of single-phase single-tariff mechanical electric meters of direct connection. The characteristic features of such devices are simplicity of design and low cost.

  
  Model CE 101

This model range is currently discontinued and is being replaced.

• 200 – devices of the second generation, produced in single-phase and three-phase versions. Modifications are being made to allow remote readings to be taken in two-tariff (day-night) and single-tariff modes. For this purpose, a special module (for example, a GSM modem) is built into the device, transmitting information to the appropriate service. Below is a table where, for clarity, several modifications from this model range are given with a description of the main technical characteristics.

Table 1. Example of abbreviated technical parameters of various devices of the 200 model series.

As can be seen from the table using the example of the 230 model, the plant can produce several modifications of the device. To define them, special characters are used, they are given below.

Designation of modifications using symbols

Now it will not be difficult to decipher the markings of any Mercury device. For example, the marking 230 AR 01 r 5 60 a 380v means that this is a 3-phase electric meter that allows you to measure the consumption of active and reactive energy. The device is designed to operate with a rated voltage of 380 V and a current of 5-60 A (nominal and maximum value).

Connection diagrams

The installation methods for the Mercury 230 AM meter and single-phase devices are largely similar. But there are many differences and difficulties when installing three-phase devices, so they are produced with an installation diagram located on the back of the case.

Correct installation of the meter requires strict adherence to the sequence of connecting wires that differ in the color of the insulating coating. For a three-phase network, phase A can be highlighted in blue or cyan, phase B in orange or brown, phase C in purple, and the neutral or neutral phase in green.

For devices such as Mercury 230AM, 230AR, 230ART, 230 ART2, the following installation methods can be noted:

• by direct connection;
• using 2 or 3 current transformers;
• to a 3-wire network via 2 voltage transformers and 2 current transformers;
• by connecting to a 3 or 4-wire network with 3 voltage and current transformers.

Direct connection of the device implies a direct connection to a network with voltages of 220 and 380 V. The connection diagram of the three-phase Mercury meter provides for the installation of an RCD (residual current device) and an arrester (nonlinear surge limiter).

Indirect connection

This method of connecting the Mercury 230 meter through current transformers facilitates the accounting of energy costs at generators of power stations. Here the transformers are located on the busbars extending from the generator. The terminals transmit information to the meter, which records the amount of electricity produced. Electricity is transmitted through distribution devices and power lines.

Direct connection

The direct connection diagram for the Mercury 230 meter is the simplest and requires only the correct connection of the incoming and outgoing cables to the required terminals of the device. If for phase A terminal No. 1 is the input, terminal No. 2 is the output, then phases B, C and zero are connected in series to sockets numbered 3 to 8.

Semi-indirect inclusion

This option is used for energy consumption facilities with a power of more than 60 kW. Current transformers used for connection according to this circuit have electrical wires instead of primary windings. The device records the voltage that appears when electricity flows through the secondary winding. The Mercury 230 AM meter can be connected using various indirect connection schemes.

The sequence of switching on the electric meter terminals is as follows:

• 1, 2 and 3, respectively, the input, the end of the measuring winding and the output of phase A;
• 4, 5 and 6 - input, end of the measuring winding and output of phase B;
• 7, 8 and 9 - input, end of the measuring winding and output of phase C;
• 10 and 11 - input and output of phase “0”.

Significant simplification of the installation of the device can be achieved by using a semi-indirect connection of the transformer current according to the “star” circuit. Along with this, the number of wires is reduced, the accuracy of current readings is maintained, although the internal connection diagram becomes somewhat more complicated.

Connecting the meter

The product is mounted using a DIN rail, which greatly facilitates installation. When connected, the appropriate electrical power is switched off.

Connection diagrams are indicated in the product passport and are duplicated on the terminal compartment cover.

Direct connection Using 2 transformers Using 3 transformers

Confirmation of installation and commissioning of the electric meter - an entry in the appropriate section of the passport based on the results of connecting the device.

The meters are intended for use indoors and can be used in places that have additional protection from environmental influences (installed indoors, in a cabinet, in a panel).

METROLOGICAL CHARACTERISTICS

SPECIFICATIONS

Measurement, accounting, storage, output to LCD and transmission via infrared port of active electricity separately for each tariff and the amount for all tariffs for the following periods of time:

• energy from resetting the readings;
• energy at the beginning of the current and previous days;
• energy at the beginning of the current and 11 previous months;
• energy at the beginning of the current and previous year;
• consumption for the current and previous days;
• consumption for the current and 11 previous months.

• effective values ​​of phase currents and voltages;
• values ​​of angles between phase voltages;
• network frequency;
• power factors for each phase and for the sum of phases.

Legend: Mercury 231 AT-01 I

A – active energy metering; T – internal tariff, electronic seals;

I – infrared IrDA port.

Certificates:

Certificate of conformity TS Mercury 231AT3.5 MBS Certificate of type approval of measuring instruments Mercury 231AT1.4 MBS Certificate of recognition of type approval of measuring instruments (Republic of Kazakhstan) Mercury 231AT192.7 KB

Documentation:

Description of the type Mercury 231AT448.2 KB Verification method Mercury 231AT964.5 KB

The multi-tariff electricity meter Mercury 231 is designed to be used to take into account indicators of electricity consumption when connected to a three- or four-wire electrical network.

The device is characterized by the presence of a pulse output and a built-in infrared IrDA port, which allows you to read and operate the device in stand-alone mode or connected to an automated data processing system.

Connection diagram for electricity meter M. 201 with four terminals and automatic switches

Electricity consumption in Mercury 201 is recorded using an electronic device of a modular principle. The readings of the device are not affected by whether the connection is made with direct or reverse polarity. Even by swapping the input and output wires or replacing the connector for the neutral with the phase input, it is impossible to malfunction this device.

The manufacturer recommends connecting according to a very simple scheme:

Diagram of a 4-terminal connection of a single-phase electricity meter Mercury 201 with automatic machines (SNiP)

The four terminals of the single-phase Mercury meter are designed:

• 1 – terminal for connecting the input phase wire;
• 2 – output terminal for connecting electric current consumers;
• 3 – power line neutral input;
• 4 – output terminal for the neutral wire to consumers.

When connecting wires to the device, you must first remove the protective plastic panel from it and unscrew the screws in each of the four cells to such an extent that the prepared, cleaned of the insulating layer and aligned ends of the wires fit freely into them. Then the wires need to be inserted into their cells and tightly clamped with screws using a Phillips screwdriver.

It is important! Before you begin connecting a single-phase Mercury meter, you should carefully study its passport, instruction manual and understand the connection diagram. To ensure reliable electrical contact in each cell, the wire is clamped with two screws, the top screw is tightened first, then the bottom

To avoid mixing up the wires when connecting, you should insert them into the cells in order, from the first to the fourth. You can make sure that everything is done correctly and that the contacts will be reliable by gently shaking each wire. If there is no lift movement of the exposed ends clamped with screws, the protective cover closes

To ensure reliable electrical contact in each cell, the wire is clamped with two screws, the top screw is tightened first, then the bottom one. To avoid mixing up the wires when connecting, you should insert them into the cells in order, from the first to the fourth. You can make sure that everything is done correctly and that the contacts will be reliable by gently shaking each wire. If there is no lift movement of the exposed ends clamped with screws, the protective cover is closed.

Phase and zero are supplied to the RCDs, and phase wires are supplied to the circuit breakers. Bypassing the machines, protective and neutral contacts should be laid to the connected consumers. All consumers connected through an RCD must also have a grounding contact.

Outputs from circuit breakers and residual current devices are used to connect lighting fixtures and sockets for low-power consumers. RCD is used for more powerful household appliances - washing machine, boiler.

If it is necessary to use grounded consumers in a residential network, a slightly different operating scheme is used:

Electrical connection diagram using a ground wire (SNiP)

The grounding wire is suitable for all sockets and technological connectors and provides protection for household appliances from short overloads.

Taking readings from a multi-tariff meter

Popular types of multi-tariff electricity meters:

• Mercury 230 ART-01 Mercury 230 ART-02 Mercury 230 ART-03

In order to take and transmit readings from the meter, you will need to record the following indicators T1 - electricity consumption during the day T2 - electricity consumption at night

Read

Electricity meter SO-EE6706 - characteristics

Before taking readings, check that the meter is in ready mode - to do this, look at the upper left corner of the display near the letter A there should be a dash as in the image below. If mode A is not installed, then you need to switch the counter to this mode by briefly pressing the right button (next to the enter button). Further, when the counter mode is set to mode A, the choice between indicators is carried out by briefly pressing the Enter key.

To do this, press the enter key on the meter; the display will display the indicator of daytime electricity consumption T1, write it down.

Press the enter key again and write down the indicator T2 (night time consumption)

We enter the readings taken from the meter into the payment for electricity and pay for the electricity.

Primary requirements

You cannot joke with the seal - one of the first rules. If the device body or sight glass is accidentally damaged, further operation is undesirable - during a control check by energy supervision specialists, the incident will be considered an attempt at fraud. Mercury meter connection diagram

The results of electricity metering are displayed on a liquid crystal display. Recommendations for installing automatic machines Let's consider in more detail how to connect an electric meter and automatic machines: to protect the measuring device from overvoltage in the network, automatic machines are installed before entering the line into the meter; if the machines are installed after commissioning, if there are significant voltage fluctuations, the device will simply fail; According to regulatory documentation, only one circuit breaker is allowed to be installed per phase wire, but if possible, it is preferable to install a two-pole one, which will cut off both the supply and the neutral.

Next you need to check how the device works. Phase conductors are connected to two contacts - input and output, and the same neutral conductors are connected to the other two. However, energy sales companies allow its use only if it is possible to seal the automatic device.

Electrical installation rules stipulate that the meter must be connected after the machine. Connection requires opening the terminal box. Indeed, early modifications of the series had such a drawback. According to preliminary estimates, the device can function normally for at least 30 years, subject to operating conditions. The metering device is made in a plastic rectangular case. The photo shows a copper wire with a cross section of 2.5 mm2. After them, neutral conductors are connected.

The cover itself is mounted on the body as tightly as possible. If the input cable goes directly to the meter, disconnect the supply line. This will help in solving the problem of how to connect a Mercury counter. The only thing available to it is time adjustment; it will not be possible to bypass this limitation.

That is why we post several reviews from real customers who share their opinions regarding this unit. The first option is used to connect any of the two types of devices, both single- and three-phase, the second - for a device with three phases with a load of 60 kW and above. The device itself must be sealed by the manufacturer. This circuit is quite simple and easy to understand by a user with minimal knowledge of electrical engineering.

Currently, Incotex has stopped producing devices operating on the induction principle, so only electronic modules are available for purchase. The metering device is characterized by compact overall dimensions and light weight. But it should be noted that if you were able to install the Mercury meter with your own hands, then after that you need to invite a representative of the electricity supplier to check the quality of the installation of the meter and its sealing. The lower part of the meter housing is removed and provides access to the device contacts. All electrical experts recommend connecting any model of electric meters through circuit breakers, as well as using residual current devices (RCDs). Secrets of high-quality electrical installation. Assembling a distribution board FROM and TO with your own hands

Design and principle of operation

The device records and analyzes the number of incoming pulses when electricity is supplied. The signal is subsequently processed by an analog-digital unit and displayed on a liquid crystal display or mechanical roller display.

Information is recorded in parallel into the built-in memory; it is possible to transmit information remotely thanks to the interface and modem. Product components vary for individual model modifications.

Inside the housing, which is closed by a common lid, the following components are located:

• contact strip with separate cover;
• printed circuit board.

The printed circuit board is equipped with the following elements:

• power supply;
• pulse output;
• microcontroller;
• built-in memory;
• interface, optical port or modem, depending on the configuration option;
• LCD screen or mechanical display.

Block diagram of the counter - Mercury 231

Features and advantages of the Mercury 230 device

The Mercury 230 AM electric meter and its other modifications are used to measure, store and display on the LCD (liquid crystal display) data on electricity consumption for the reporting period of time. The device can be connected either through current transformers or through direct connection to the power line.

Single-phase and three-phase electricity metering devices differ in the value of the connected voltage. If the network voltage for a single-phase meter is 220 V, then for a three-phase meter it is 380 V.

The advantages of a three-phase meter are as follows:

• significant energy savings at night - up to 50%;
• increased accuracy class - the device error is 2-2.5%;
• mean time between failures, reaching up to 150 thousand hours;
• durability - the service life of the device reaches 30 years;
• There is a built-in electric power modem responsible for data export.

The disadvantages include the rather impressive dimensions and complexity of installing the device. Depending on the type of equipment, you can connect them in different ways.

Taking readings

The readings are taken in the following order:

1. The value of an integer is rewritten (located before a period or comma) without taking into account the fractional part.
2. Past testimony is taken away.
3. The result is multiplied by the value of the price.

For multi-tariff models, the calculation is carried out separately for each tariff plan, with the final summation of the value.

Versions with LCD display, in addition to the whole number of kilowatts, two digits with tenths and hundredths of the value located to the right of the dot.

Mercury 201 and its five models

Mercury 201
Mercury 201 is a modern meter for active energy consumption by consumers of the household electrical network. The device is manufactured, model 201 has several modifications, each with its own specifics.

Externally, models of electrical measuring devices differ in indexes. Each of the five modifications of Mercury 201 has its own limit for measuring alternating current strength and its own way of displaying power consumption on the front panel. The maximum operating current of the device is from 5 to 10 A; the method of indicating readings can be either liquid crystal or mechanical.

The operating principle of the Mercury 201 meter is that the primary electricity consumption signals are generated by voltage and current sensors. Then they go to a converter controlled by a microcontroller. After decoding, the signals supply information to a mechanical or liquid crystal type output device.

Connection diagram for an EM located on the general electrical panel of the floor (SNiP)

The Mercury 201 electricity meter is designed both for independent metering of electricity consumption and for operation in an automatic information-measuring accounting system.

Now Mercury 201 brand meters are the most affordable and accurate. They replace older energy metering devices with rotating disks.

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Modifications

The electric meter of the specified series (231 AT) is developed in two modifications. Marking: AT-0X I. In the presented designation:

• A – ability to measure active energy;
• T – internal tarifficator;
• 0Х – modification (01 – for starting current 0.020A, 03 – 0.005A);
• I – presence of an infrared port.

A simpler modification 231 AM is a single-tariff model, equipped with an electromechanical six-digit readout mechanism. Allows you to only measure consumed electrical energy, in kilowatt-hours.

Features in design

The Mercury electricity consumption meter has the following characteristic features:

1. screwless version. Thanks to this, the device cannot be hacked;
2. Possibility of operation in any polarity. Old induction meters (with a rotating disk) could be “tricked” by switching the phase and neutral positions. “Mercury” in this case will still work properly;
3. two ways to display information.

According to the last characteristic, counters are divided into:

• electronic (Mercury 201.2, 201.4, 201.8): data is displayed on a liquid crystal display, there is a function for transmitting readings via a wired network;
• electromechanical (Mercury 201.5, 201.6, 201.7): the scoreboard is made in the form of several rotating rings with printed numbers (reading device).

In an electromechanical reading device, the last ring is painted red and displays tenths of a kilowatt-hour. Mercury has a wide range of operating temperatures. This allows meters to be installed outside, provided there is a protective canopy.

Electronic electricity meter Mercury 201.2

Electric meters of this brand are produced in single-phase and three-phase versions. The first group includes counters of the Mercury 201 series, the second - Mercury 230. According to the accuracy class, the device has a technological reserve. Its circuit contains a shunt that allows you to accurately measure the direct current component.

The device is equipped with a plastic case with dimensions of 105x105x65 mm (the latter is depth). Weight - from 250 to 350 g (depending on the model). Fasteners - for DIN rail installation. The terminal block contains 4 screw terminals (single phase model) and is protected by a removable cover. The digital display is located on the front panel on the left; technical specifications are also displayed on the right.

In addition to the basic components - a mechanism for metering electricity consumption, a terminal block and an indicator - the Mercury meter contains:

1. optocoupler - pulse output (telemetry);
2. built-in memory. Meter readings are regularly recorded here automatically;
3. optical port An “electronic button” function is provided;
4. microprocessor;
5. PLC modem. Allows you to connect the meter to an information-measuring system (remote monitoring of readings) with a wired network.

It is important for a potential buyer to know about the disadvantages of Mercury electricity meters:

1. relatively large dimensions. For comparison: the width of the CE101-R5 counter with the same parameters and price is 89 mm, the Neva 103 counter from, also similar, is 78 mm. Due to the large width, you have to purchase a larger shield, and therefore more expensive. It is especially difficult to install a multi-tariff meter from this): you have to cut out a window in the panel;
2. inaccessibility of the place for filling. According to user reviews, sometimes you have to independently widen the hole for the wire or fishing line of the seal.

"Mercury" has a simple design. If installation is planned in an apartment, many prefer more stylish models.

Prices for Mercury 231

The cost of AM meters starts from 2 thousand rubles, for an AT meter the minimum price is 3000 rubles.

We recommend: Meter NEVA MT 113 - description, technical characteristics

If you choose which meter model to buy, single-tariff or multi-tariff, then it all depends on when you use electricity most; if at night, then install a two-tariff one, taking into account day/night, this will save on electricity.

If you use electricity during the day and do not want to change your mode, then choose a single-tariff model.

• https://myschetchik.ru/elektroenergii/merkurij-231
• https://www.incotexcom.ru/catalogue/m231at
• https://pouchetu.ru/elektricheskij/merkurij-231
• https://electroschetchik.ru/m231am.php
• https://maloplatim.ru/schetchik-merkurij-231.html

Specifications

The best option would be to contact a specialist who can select the device in accordance with the requirements of your home or any other institution.

The device can be connected either through current transformers or through direct connection to the power line. The disadvantage of this connection option is the large number of wires used. Please tell me, I doubt that the TT and meter are connected correctly.

During the installation process, all existing restrictions must be taken into account.

The time interval between verifications is months. Low own energy consumption. It can only be used for high-voltage networks. Interface You can connect the Mercury AM meter in this way using various schemes, in each of which current transformers will be used as a unique source of information.

See also: Standard volume

The indicator of this particular voltage is recorded by the meter. It is through the tarifficator that you can automatically regulate the load and reduce the level of consumed voltage. Open the lid and study the diagram.

Correct installation of the meter requires strict adherence to the sequence of connecting wires that differ in the color of the insulating coating. Article rating:. With a consumed voltage of 5 VA, active power - 2V, and with a rated maximum current of , , A, there must be a complete characteristic of the consumed current of no more than 0.2A, provided that a transformer connection is made or direct registration and metering of active energy is carried out. You can select a device by power class, which can be from 0.2 to 2.5. For a three-phase network, phase A can be highlighted in blue or cyan, phase B in orange or brown, phase C in purple, and the neutral or neutral phase in green.

Which type to choose

Three-phase power meters can have direct and indirect connection. Indirect inclusion is used in cases where electricity metering takes place under high load. The connection will be carried out using the transformer current.

Direct connection to current is most common in everyday life. This method is used in residential apartments, private houses, garages, workshops and other premises where the current load does not exceed the nominal value of 100 amperes. The maximum permissible power for direct connection is up to 60 kW. The electricity meter is connected to a three-phase line through a transformer on a DIN rail, which is designed for three device mounts.

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 the necessary information on 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 a DIN rail.

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 electrical contacts of the device will be open. 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.

Installation

The device is attached to the bar using protrusions on the rear case wall. The connection diagram is simple:

• At the bottom of the front side of the electric meter there are contacts;
• counting from left to right you get two wires for three phases A, B and C;
• two terminals on the right - for the neutral wire;
• Don’t forget about automatic devices that turn off the device if the load exceeds the permissible limit.

A sample connection diagram is located on the rear panel of the electric meter:

Appearance of model 231 AM:

Modification 231 AT looks like this:

The indicated devices are currently produced (model AT - in one modification - 01). Average cost of the device, depending on modification:

• 231 AM – up to 1.5 thousand rubles;
• 231 AT – up to 3.5 thousand rubles.

When installing the meter, it is important to comply with the manufacturer's requirements and adhere to the correct connection diagram

Short description

The Mercury 201 electricity meter has a plastic body and a liquid crystal screen on which readings are displayed. Technical parameters are indicated next to it. The device can weigh, depending on the model, up to 350 grams. The design ensures security; an attacker will not be able to hack the device. Product accuracy class – 2.0 (1.0).

In addition to the device itself, the kit includes a passport and instructions for use. In the documentation you can see how to properly connect the Mercury 201. When connecting, the device is placed on a DIN rail, and there is no need to use additional clamps. The bottom cover protects the device contacts.

Device dimensions

Design features of the Mercury meter

The device body has a rectangular shape. Based on the method of displaying information about energy consumption, the Mercury 201 electric meter is available in two versions: electronic (data on the electricity used is displayed on a liquid crystal display) and electromechanical, containing a rotating drum unit. Performance data is shown to the right of the screen. When removing the bottom cover, the consumer gains access to the input contacts, to which the necessary wires are connected.

Types of counter

There are 4 basic versions of the model available:

• AM – direct connection version with a mechanical display for the active component of electricity. Presented in a single modification 01 with a working (maximum) electric current of 5 (60) A, taking into account the data for one tariff. On the board, 5 digits indicate the integer value of the indicator, one – fractional;
• AMsh is a product version that differs from the previous model in accuracy class. All 6 digits on the display determine the whole number of kilowatt-hours. Produced in two modifications 01sh and 02sh, differing in current parameters;
• AT-01 is a device equipped with a liquid crystal display and a tarifficator that divides indicators into 4 tariff plans. Current parameters – 5 (60) A;
• ART-01(2)ш is a modification with similar characteristics for electric current, in addition to the tarifficator, equipped with an electronic seal, which allows you to separate the taken into account electricity indicators into active and reactive components.

The manufacturer offers the possibility of completing models according to an agreement with the customer.

Advantages and disadvantages

When producing the model line of Mercury brand meters, the practices of other developers were taken into account. The tasks were set to manufacture a device characterized by high accuracy and reliability, with the latest element base, low cost, with developed functionality, meeting all requirements.

At the end of the study, the device was improved. The Mercury electric meter is distinguished by its circuit design and has maximum functionality. This was achieved thanks to the use of imported components from leading manufacturers.

The technical potential of the energy metering system at a separate cost guides the correct consumption of electricity. During the period of maximum use, which occurs in the morning and evening hours, the tariff per kilowatt-hour of electricity is noticeably higher, while at night the cost is several times lower.

However, in practice, the number of people who have switched to energy metering at tariffs is not so large. What is the reluctance of consumers to switch to the latest technical equipment? Experts highlight several points:

• the fairly low cost of electricity, which for some time restrains Russians from spending on modern devices;
• not all citizens want to change their daily routine and use electrical appliances with more power (for example, a washing machine) at night;
• not every production benefits from switching to night shifts;
• Certain groups of the population experience difficulty in taking readings from the meter according to tariffs.

Despite some disadvantages, the advantages of switching to multi-tariff electronic electricity metering devices are beyond doubt.

How to take readings

Let's decide how to take readings from these meter models.

• For the Mercury 231 AM counter, everything is simple, we rewrite from left to right all the numbers up to the decimal point, or up to a number with a different background. Numbers with a different background show fractions of kilowatts that do not need to be taken into account when taking readings.
• Taking readings from Mercury 231 AT will require a little more effort, since the meter keeps records of several tariffs, so we need to rewrite the values ​​for each tariff. If we are calculating at two tariffs, for example day and night, then we record this data.

All information on the display scrolls automatically, changing data after a short period of time.

How to connect the Mercury 201 electric meter: step-by-step instructions

First of all, you need to purchase an electric meter. To do this, in energy sales you need to find out in advance what accuracy class the meter should have. The equipment is installed on the wall in a specially designated place for it.

It is important that it is dry and also located close to the entrance to the room, to which you can easily connect a cable carrying electric current.

In accordance with the installation dimensions of the metering device, the holes for fastenings are marked. After which the electric meter is fixed to the wall using three screws. Before connecting the electric meter, it is important to make sure that after installation the device is positioned strictly vertically. Wiring is connected to the meter, which leads to the distribution board, from which electricity is supplied to consumers

The connection should be made according to a diagram that is the same for all types of metering devices. A phase is connected to the RCD. Circuit breakers or a fuse, “a zero” in most cases, are attached to a common terminal panel. The phase terminal is located on the counter second from the right, first from the right - “a zero”. When connecting wires to the terminal clamps of the device, it is important to leave a free margin of approximately 60 mm. This will allow you to take measurements using electrical clamps and, in the event of an incorrectly assembled circuit, it will be easy to reconnect. And finally, you need to call a specialist from the electricity supply company. He will check the correct connection of the apartment network to the metering device, and will also connect and seal the device.

Now you know how to properly connect an electric meter, but do not forget that replacing the device yourself without agreement with the company that supplies electrical energy is strictly prohibited. Without permitting documentation for the installation of new equipment, the old electric meter is also prohibited from being removed.

Commissioning

Commissioning work includes performing various tasks to prepare for installation and check the system. First of all, you need to write a statement from the organization through which energy is supplied to your home or multi-story building. Since carrying out a three-phase installation and connecting an electric meter requires the approval of specialized structures, you must obtain permission before starting installation. The company assigns a specialist who must connect this device through a transformer.

This approach is a common requirement of all organizations, and is also dictated by safety precautions when working with electrical equipment. Unprofessional installation of a reading device can cost you a lot. After connection, the entire power supply system to the end consumer is checked using special instruments. When everything is done, the three-phase meter is sealed with a special company tag. If the seal is broken, this may result in a fine.

Types of metering devices

Mercury 201

On sale you can find different modifications of the Mercury electricity meter. All of them can be used to account for electricity in the house. There are single-tariff, double-tariff, and three-tariff products.

Mercury 201

This is one of the most popular types of metering devices for use in homes and businesses. There are single-phase, two-phase, single-tariff, multi-tariff. Thanks to their design, they are completely protected from hacking and attempts of unauthorized intervention in the operation of the device. They are also divided into several types and have their own distinctive features. Such devices include models 201.2; 201.5; 201.22. Designed for a rated current of 5 A and an operating current of up to 60 A. Models 201.4 and 201.6 have an increased maximum current of 80 A. They are used in places with a large amount of electricity. Electric meters of the 201 series display energy in different ways. 201.4 and 201.22 have a digital indicator, 201.5 and 201.6 have a mechanical indicator.

Mercury 230

Mercury 230

The metering device is suitable for use in everyday life and in industrial environments. Often installed in cottages and private homes with a large number of electronics and household appliances.

A special modification designed for transformers is available for sale. It can perform its duties autonomously and in conjunction with an automated energy consumption metering system.

The Mercury 230 electric meter works similarly to other metering devices. Receives signals from sensors and translates information into a form understandable to the consumer - energy and power. It is possible to read data directly from the device or remotely.

Main design elements:

• frame;
• grounding device;
• contact block;
• lid.

Mercury 231

Mercury 231

The three-phase single-tariff meter Mercury 231 is used for energy metering in networks with three phases. It can be connected directly or through a transformer.

The most famous modification is 231 AM-01. The device measures the load digitally. The kit includes fastenings for DIN rails and an anti-reverse counting device with a magnetic shield. The device has a simple mounting and does not cause any difficulties in operation. It is compact and lightweight.

Characteristics of Mercury 231:

• First class accuracy.
• Rated voltage 3*220/380 V.
• Rated current 5P.
• Maximum current 60 A.
• High sensitivity levels.
• The power consumed by the parallel circuit is no more than 0.1 W, the total power is no more than 7.5 W, the active power is no more than 1.5 W.
• Operating temperatures from -40°С to +55°С.

You can set a single tariff.

Mercury 234 ART

Mercury 234 ART

The Mercury 234 model is designed for one- and two-directional electricity metering in three-phase networks. The connection can be made through an instrument transformer and directly with the possibility of tariff metering by day zones. Information can be accumulated over a long period of time and can be transmitted through digital interfaces over wired or wireless channels.

Specifications:

• PLC-I interface.
• It is possible to connect additional power supply with a voltage of 230 V.
• Galvanically isolated pulse output.
• Automatic self-diagnosis of the device with error detection. The device can stop working on its own if a problem is detected.
• Availability of a built-in 60A relay.
• LCD backlight.

• Measurement, accounting, display, storage, transmission of information. Capable of performing all these actions with active and reactive energy, readings per day, week, month.
• Tariff accounting by zones.
• Accounting for losses in power lines.
• Measurement of auxiliary components - instantaneous power values, effective values ​​of phase currents, network frequency.
• The event log.

The main use is in everyday life and in production.

Is it possible to save money?

Savings are achieved through careful consumption of energy resources and the installation of modern consuming devices, including lighting devices.

An additional opportunity to reduce the size of your electricity bill is to choose a model with separate tariffs, which allows you to separately calculate readings for each of the possible prices.

Reliable protection of the electric meter and design features, taking into account the possibility of remote data monitoring, eliminate interference in work in order to reduce actual information or slow down operation.

Connection diagram for Mercury metering devices

The single-phase electricity meter Mercury 201 is a metering device that monitors electricity consumption “modulo”. This connection means that installing the device in a network with any current polarity will not affect its operation in any way. If during installation the output and input are swapped or the phase is connected to neutral, this will not lead to catastrophic consequences and the electric meter will continue to take into account the amount of electricity consumed. But still, the manufacturer strongly recommends installing the Mercury 201 meter in accordance with the standard connection diagram. This circuit is quite simple and easy to understand by a user with minimal knowledge of electrical engineering.

The connection diagram of the three-phase electricity meter Mercury 230 is also quite simple, only the number of connected contacts increases, and the principle is the same as with the Mercury 201 meter. However, for three-phase devices there are two connection options: direct and semi-indirect through current transformers. Connection via current transformers is carried out when the load is more than 60 kW. Let's consider both options separately.

1. Direct connection. In this case, the device is connected directly to a three-phase main power line through input circuit breakers. If your house or apartment has a standard set of electrical appliances and household appliances, then direct connection is the right option. If there is a large amount of equipment at the site that consumes electricity, you should choose a different connection scheme.
2. Semi-indirect connection. As already mentioned, this connection option for the Mercury 230 meter is used when the power of the electrical equipment being serviced is over 60 kW. In this scheme, current transformers are used, in which the primary winding is the phase conductor of the network. For electricity meters connected using current transformers, regulatory documents provide for special requirements for their installation.

We reviewed the connection diagrams for Mercury 201 and Mercury 230 meters. This information is the basic information in accordance with which these metering devices should be installed in the distribution board. The installation of electricity meters from the Mercury company must be carried out in compliance with the requirements of regulatory documents and the manufacturer. Using the example of connecting the Mercury 201 meter, we will consider this process in detail.

Recommendations! All electrical experts recommend connecting any model of electric meters through circuit breakers, as well as using residual current devices (RCDs).

It is also important to know that:

1. The housings of Mercury brand metering devices are made of dense plastic. The material protects the device components from water and dust.
2. In the domestic sector, the three-phase meter "Mercury"-230 is installed in enclosed spaces or specialized cabinets. In the latter case, more reliable protection is created from rain, wind, sun, frost - everything negative that the environment can bring.
3. After connecting the metering device, it is necessary to immediately install protective circuit breakers for safe operation of the equipment.

Four steps to connect a three-phase meter directly

The circuit is not much different from connecting a single-phase meter. The only difference is more terminals.

The first step: the supply conductors should be stripped of the factory insulation.

Second step: they must be attached to a three-phase protective switch.

Third step: phase conductors are connected to three pair terminals. The odd-numbered clamps are connected first.

Fourth step: zero conductors are attached to the unused contacts.

Three-phase meters provide for the supply of current to stationary household equipment. A tap from the phase wire will help. The machine must be single-pole. It should be attached to the zero terminals.

Meter installation

Installation and connection of the device must be carried out by a qualified specialist. It is necessary to first submit an application to the energy supply company, since in the case of self-connection there may be problems with official commissioning.

The connection diagram is quite simple and does not require the use of additional devices:

Connection diagram for MERCURY 200 meters to a 230 V network

This energy meter model is a reliable and durable device that meets the necessary standards required by domestic legislation.

How to take readings?

To take meter readings for model 231 AM, you simply need to write down the data located on the left side. Another color (on the right) indicates tenths and is not taken into account when reading information.

Modification 231 AT:

• the display shows the number for a separate tariff, the data changes periodically;
• the indicator is written to the left of the point (to the right is the fractional part);
• icon T1 – data on the day rate, T2 – on the night rate;
• The data changes automatically after some time.

Important! There is no need to write down the entire number from the display, since the dot acts as a comma separator between the integer and fractional parts of the number. The electric meter is programmed by connecting to a PC via interface

This must be done by a qualified technician.

The electricity meter is programmed by connecting to a PC via interface. This is performed by a qualified technician.

In addition to the recorded information on tariff plans, the following data is displayed on the display:

• the value of phase voltage and current for any of the phases;
• active power (separate and total);
• power coefficient (similar);
• size of angles between phase voltages;
• current oscillation frequency;
• indication of the current time and date.

Instrument verification

In accordance with the norms of Federal legislation, metering devices are subject to mandatory verification. It can be primary and periodic. The first is performed directly at the factory where the products are manufactured. The second is periodically during operation after the expiration of the verification interval; information about it is indicated in the technical passport.

Sometimes an unscheduled procedure may be scheduled before the verification period expires. The following cases are provided for this:

• loss of a document indicating completion of a planned procedure;
• after the device has been set up or adjusted, for example, after repair;
• when installing a new device.

For verification, standard instruments or special installations are used, such as the Mercury 211 multifunctional device. The electronic device circuit includes a source of fictitious power and a reference (model) electric meter. Such a device can simultaneously test up to 8 devices.

After verification, information about this is entered into a special register, which contains the device number, year of manufacture and test date.