All existing models of electricity meters are designed to perform one main function - they measure the amount of electricity consumed by the consumer. As a rule, specially trained people are hired to install electricity meters. But if you really want to install such a device, you can on our own. You just need to thoroughly understand the connection diagram and follow the instructions in everything.

Remember: only you are responsible for all possible consequences of unauthorized installation of accounting equipment.

Parameter	Classification of electricity meters
Type of current used	constant and variable
Number of phases	single-phase, three-phase
Number of tariffs	single and multi-tariff
working mechanism type	mechanical, electronic and hybrid electricity meters - a rarely used intermediate option with a digital interface, an inductive or electronic type measuring part, a mechanical computing device
By connection type	devices for direct connection to the power circuit and devices for transformer connection, connected to the power circuit through special instrument transformers

There are two main types of meters on the market: induction and electronic. They differ in their mechanism of action and measurement accuracy.

Induction models are rapidly being forced out of the market. The government is actively promoting this. The main disadvantage of devices in this category is that they are very easy to “deceive,” which unscrupulous consumers happily take advantage of.

Electronic meters are more versatile, compact and accurate. Additional benefit modern models is the ability to configure them to work in a multi-tariff mode. This point is especially relevant for consumers living in regions with different electricity tariffs during the day and at night.

Thus, choosing the type of counter for self-installation, it is strongly recommended to give preference to modern electronic models.

Additionally, meters are classified according to indicators such as accuracy class and rated current. The smaller the meter class number, the more accurately it works.

The required rated current is determined individually. To calculate, check with your local energy sales office for the permissible active power indicator established per consumer. This number must be divided by 220V or 380V depending on the voltage of your electrical network.

For users connected to a three-phase network, a higher active power threshold is usually set, however, using a three-phase connection in everyday life is not entirely advisable.

Important! If the meter is connected to buildings for which the calculated current value exceeds 100 A, current transformers are additionally installed. Directly “embed” measuring device in such conditions it will not work.

In such situations, it is important to take into account that the inclusion of intermediate elements in the circuit can negatively affect the accuracy of accounting, so planning a transformer circuit must be approached with knowledge. To do this, it is better to contact a qualified specialist.

When choosing a meter, be sure to pay attention to the integrity of the seal and how long ago it was installed. You will find the seal on the screws of the meter casing. The maximum permissible limitation period for installing a seal for single-phase devices is 12 months, for three-phase devices - 24 months.

Self-connection of the meter: what does the law say about this?

To avoid problems with the energy sales service, first contact its local representative to conclude an agreement and obtain the necessary permits to carry out the planned work.

An employee of the mentioned service will give you documents that, among other things, will detail the requirements that must be observed before and during the installation of the electric meter.

The law requires that meters connected to private houses be installed outside the residential premises. This is done so that, if necessary, an energy sales service employee can gain access to metering equipment. The law obliges apartment owners to install metering devices in a common panel, located, as a rule, on landing.

Studying the meter connection diagram

We will not consider complex connection options - we will leave them to professionals, because... Without the appropriate skills, it is unlikely that you will be able to cope with such work on your own.

The simplest option is a single-phase connection. It is performed using a maximum of 6 cables and load. The ground, phase and neutral wires are connected to the input of the meter. Similar wires are connected to its output.

An automatic switch is installed in front of the meter. This is done for greater safety and ease of use. A small device will independently disconnect a house or apartment from the power supply if any kind of dangerous situation occurs.

To avoid problems with the energy sales service, be sure to seal the switch. To do this, we use a basic kit consisting of a mounting DIN rail, a seal and a plastic box.

The design of a typical electric meter includes a bus. This product is made in the form of a copper strip. Dielectric clamps are used to secure it. A number of holes are made along the length of the bus for supplying electrical cables and their subsequent fastening. This connection method is relevant when it is necessary to combine several separate wires into one cable.

Meter installation: basic rules and requirements

We install the electric meter in strict compliance with the approved rules. First of all, we study the safety requirements for the operation of electrical equipment of any type and purpose.

1. We install the meter at a temperature not lower than +5 degrees. Accounting equipment, like any other electronics, does not withstand exposure to cold.
2. When installing the meter outdoors, we build a sealed heated cabinet for it. All materials and equipment necessary for this are sold in specialized stores.
3. We mount the electricity meter at a height of 1-1.7 m above the base. If the device is placed lower, it will simply be inconvenient for you to view the readings.

Step-by-step instructions for installing the meter

First of all, we prepare the kit for work. We will need the following:

• counter and shield;
• installation tools with pre-insulated handles;
• insulators;
• switches (automatic);
• wires;
• fasteners (screws and nuts);
• voltage meter;
• DIN rails.

First step

Let's find out whether our electrical network is single- or three-phase. We calculate the required number of switches.

Second step

Install meter into the body of the protective shield. Fastening is carried out using special clamps from the kit.

Phase A enters meter terminal 1 and exits terminal 2 to the load; phase B enters terminal 3, exits into 4 and phase C enters 5, and exits from 6. 7 and 8 are zero

Third step

We install switches. We will attach them to the DIN rail with a special spring-loaded latch. We first fix the rail itself with screws to the support insulators.

Fourth step

We install grounding and protective busbars. We attach them to a DIN rail or insulators in the body of the protective shield. Fixation is carried out with screws and nuts. We place the buses at such a distance that the possibility of shorting the wires is excluded.

First, we connect the load to the switches, then we connect the machines to the meter, and only after that we connect the metering device itself.

Fifth step

We connect the loads. We connect the phase to the lower terminals of the switches, connect the zero to the zero bus, and connect the ground wire to the ground bus.

Sixth step

We install jumpers connecting the clamps on top of our machines. Jumpers are sold in specialized stores. We first buy the required number of jumpers according to the number of machines.

Seventh step

We connect the electric meter to the load. To do this, we connect the “phase” output (which is the third terminal of the metering device) to the upper terminals of the machines. Next, we connect the “zero” output (represented by the fourth terminal of the metering device) to the zero bus.

Eighth step

We fix the body of the electric meter panel on a wall or other suitable flat base. Maintain a comfortable height.

Ninth step

We find phase, zero and grounding. If there is no grounding, we check each core with a special indicator. This simple device will help us find the phase. If there is a ground connection, you will easily recognize it - usually this wire is painted or marked green.

Tenth step

We turn off the electricity supply to the house or apartment.

Eleventh step

We connect the zero wire to the third terminal of the meter, and connect the phase cable to the first terminal.

Twelfth step

We check the operation of the electric meter at idle, and then gradually apply the load.

Thirteenth step

We contact the local energy sales office for additional checks and sealing of metering equipment.

At this point, the work of manually installing and connecting the electric meter is completed.

Congratulations, you have successfully completed all the activities and saved money on the services of third-party installers!

Video - Electric meter connection diagram

This connection of several meters makes it possible to obtain new versions of meters with new characteristics (for example, speed).

Rice. 7.9. Parallel connection counters.

Input pulses are applied simultaneously to 2 or more counters, the outputs of which are connected to the AND element (Fig. 7.9). The signal at the output of the AND cell appears when the pulses coming from these counters coincide. This occurs when the number of input pulses reaches a value equal to the smallest common multiple of the counter division (conversion) factors. So, for example, to obtain a total division factor of 35, you can use two counters with factors of 7 and 5. The output pulses taken from the first and second counters coincide only after 35 input ones. To implement a conversion factor of 35, you can use 6 flip-flops connected in series and an AND logic element to organize feedback. In such a counter, the delay of the output pulse relative to the input will be 6 delays of one flip-flop plus the delay of the AND logic element. When two counters of three flip-flops each with conversion factors of 7 and 5 are connected in parallel, the total delay will be 3 delays of one flip-flop plus the delay of the AND logic element. From the consideration of the work it follows that the delay of the output pulse relative to the input in such a counter is less than in a counter with sequential transfer of carries. The amount of equipment is the same. It is convenient to use parallel connections of counters to construct dividers in cases where the division coefficient can be represented by the product of two or more prime numbers.

7.4. Serial connection of meters

If a large division factor is required, it can be increased by adding a certain number of flip-flops. But adding one trigger will only double the count factor. To increase the conversion factor, you can combine groups of meters in series. Then the total division coefficient will be equal to the product of the division coefficients of the corresponding counters. For example, by connecting three decimal counters in series, we get a division factor of 1000.

7.5.Synchronous binary counters with end-to-end carry.

The circuit of a binary counter with end-to-end carry on synchronous T-flip-flops is shown in Fig. 7.10.

Rice. 7.10. The simplest scheme synchronous binary counter with end-to-end carry.

Input signal HSC supplied simultaneously to all inputs WITH counter digits. Switching of each jth trigger is possible if there is a T j signal "1". Changing the state of the highest digits of the counter is possible only if all previous digits are in the “1” state. If T j = 0 , then the trigger is in memory mode. When “1” is applied to the input, it works as a synchronous flip-flop with a counting input. The duration of the transient process is determined by the delay of the signal in the AND elements. Due to the spread in the duration of transient processes in triggers, a “race” effect sometimes occurs when the transfer signal propagates through TT And AND parallel. This may cause false signals to appear at the trigger outputs Q i .

In principle, everything is similar, only the phases are in this device not one, but three. Attention! In the connection diagram of a three-phase meter, it is necessary to take into account the color marking of the wires. This will prevent you from getting confused when connecting machines and then leading the wires into an apartment or house. Therefore, let's look at a simple direct circuit with automata, here it is below: Circuit with automata

• A four-pole circuit breaker is installed at the entrance.
• First, one phase is installed, for example, yellow (see diagram). A yellow wire is supplied from the input circuit breaker to terminal number one, which is connected to it.
• Terminal number two is also connected to a yellow wire, which is pulled to the single-pole circuit breaker.

How to connect the meter yourself: single-phase and three-phase

It should be noted that, for example, according to the standards, city apartments are allocated 3 kW of power consumption. If the apartment has an electric cooking stove, then 7 kW. This is approximately a little more than 13 A. It is based on this characteristic that it is necessary to choose an electric meter.

Attention

Typically, this parameter on the meters is located in the range: 5-15 A and 10-40 A. That is, any of them can be installed in an apartment without additional installation of a current transformer. Installing an electric meter yourself Attention! The variety of electric metering meters is very large, but the connection terminals on them are located in the same order, both in location on the panel and in the order of connection.

By the way, the connection diagram is usually located on back side terminal covers. In this way, the manufacturer ensures that the wires are connected correctly.

Electric meter connection diagram

Info

An electric meter is a device for recording the amount of electricity consumed. Electric meters are used both in production and in everyday life. Types and types of electricity meters According to the type of load, meters are single-phase and three-phase.

Important

In the household electrical network, in most cases, single-phase meters are used, because all household consumers operate from single-phase network 220V. According to their design, meters are electromechanical (induction) and electronic. Recently, in production and in everyday life, old-style meters have been replaced with new electronic meters.

When commissioning new electrical networks Today only modern electronic meters are used. This is due to the fact that they are more reliable in operation, and electricity calculations are more accurate.

How to properly connect a single-phase electric meter

Your house or apartment must have a meter installed electrical energy. He counts the kilowatts that electrical equipment has consumed, and you have to pay money for them, more and more every year, since tariffs are constantly becoming more expensive. For a number of different reasons, electricity meters have to be replaced over time.

This may be due to its failure, reconstruction of the distribution board, replacement of an old meter with a new one, replacement with a multi-tariff meter, etc. If you decide to do everything yourself, then you may need a diagram for connecting the electric meter. Connection diagram for a single-phase electric meter Here I give standard diagram, which applies to all single-phase electrical energy meters.

However, before connecting, carefully study the passport for the meter so as not to miss anything.

Practical diagrams for connecting three-phase meters, selection and installation

Group circuit breakers can be combined with a jumper of the same cross-section, but it is better to do this with a special comb, especially if there are many circuit breakers. We install a zero bus and a ground bus in the cabinet. 3. From the right pole, from the lower contact of the 2-pole machine, we connect the “zero” jumper to contact “3” of the electric meter.

View from the back side... On the back side everything should look something like the photo below... 4. From pin “4” of the electric meter, connect the “zero” jumper to the common bus N. Now we take the cover that blocks access to the bolts of the electricity meter and We cut out holes in it according to special marks for passing jumpers. It should look like this... Put the lid in place. It is secured with a central bolt. Don't forget to tighten all the bolts again before installing it. Rear view... Now we attach the cabinet body cover.

How to connect a control meter to an existing electronic one?

If you look at the diagram, you will see that the load breakers are single-pole (only one wire goes to them), and the neutral is supplied directly from the bus. ABOUT self-assembly The electrical panel is discussed in this article. How to connect a three-phase meter There are three phases in a 380 V network, and electric meters of this type differ only in the large number of contacts.

The inputs and outputs of each phase and neutral are located in pairs (see the diagram). Phase A enters the first contact, its output is on the second, phase B is the input on the 3rd, its output on the 4th, etc. How to connect a three-phase meter The connection diagram for a 3-phase meter with a consumption current of up to 100 A is almost the same: input machine-meter-RCD.

The only difference is in the distribution of phases to consumers: there are single- and three-phase branches.

How to connect a single-phase electric meter with your own hands?

Commissioning or reconstruction of electrical wiring in a house or apartment is rarely complete without installing or replacing an electric meter. According to the standards, work can only be performed by specially trained people who have permission to work in networks with voltages up to 1000 V. But you can install all the elements and connect the meter to the load (electrical appliances) without connecting the power supply yourself.

Afterwards, you need to call a representative of the energy supply organization to test, seal and start up the system. One of the housing options for the meter Connecting the meter: rules and basic requirements Exactly all the requirements are specified in the PUE, and the basic rules are as follows:

• Must be installed with protection from weather conditions. Traditionally they are mounted in special boxes (boxes) made of non-flammable plastic.

Master electrician

The latter is a switch for a group of consumers that will be connected specifically to this phase, indicated in yellow. The same is done with other phases: green - input through contact three, output through contact four, red input - 5, output - 6. Zero the circuit from the input machine is connected to terminal number seven, and exits through terminal number eight. Please note that the phase wires can change places in color, but the neutral wires cannot. Conclusion on the topic Assembling an electrical panel where an electric meter is replaced or installed is not the easiest thing. It is important to correctly approach the connection of wires. Therefore, manufacturers of electrical control meters must indicate the connection diagram on the terminal block cover. It is imperative to study it and make a connection using it.

How to properly connect an electric meter and machines

The screw clamps are arranged as follows:

1. bottom row (4 screws): connection of the supply phase, connection of the outgoing phase, for the supply neutral wire, outgoing neutral cable,
2. The top row of clamps is designed to secure terminals and power wires that go to points in the apartment (light switches or sockets).

Third. Before connecting a single-phase and three-phase electric meter, you need to make sure that there is no electrical voltage entering the apartment.

• We connect the supply wires to the circuit breaker (neutral - on the right and phase - on the left). We remove and clean the insulation, and connect it to the machine through the upper contacts.
• For wiring from the circuit breaker to the meter, wires of a certain cross-section are used. The section is calculated taking into account total power all electrical equipment in the apartment.

Single-phase meter circuit. Connecting the meter. The circuit of a single-phase meter is quite simple. In this article I will tell you how to connect a single-phase meter. I have already written before how to choose the right electric meter for a house or apartment.
Now, after purchasing a meter, there is a new task - to connect a single-phase meter to the electrical network. Single-phase meters for houses and apartments are made directly connected, i.e. without additional step-down current transformers. There is nothing complicated about connecting a single-phase meter; before installing the meter, carefully study the documentation.
instructions, examples of connecting single-phase meter circuits, etc.

Serial connection of electricity meters

First, two wires are connected to the second and fourth terminals, i.e. to the counter output. In order to connect the wires, the wire strands are stripped with a knife (or better yet, a special insulation stripper). Then the wires coming out of the meter are connected to a general circuit breaker, which supplies voltage to electrical consumers.

• After this, the wires are connected to the first and third terminals, i.e. to the counter input. To do this, part of the insulation is also removed from them. After the wires are connected, the terminal cover is closed and the meter is sealed.

Typically, installation, connection and sealing of the meter is carried out by the energy supply organization. If you carry out installation and connection yourself, then in order to avoid misunderstandings and fines, you must first contact representatives of this organization, who themselves will approve the correct procedure for work.

Many people believe that connecting an electric meter , very complicated and not simple task, which can only be done by a competent, qualified electrician. In fact, everything is funny
easy and simple, especially if you have detailed information at hand electric meter connection diagram, with step-by-step photographs and professional comments. This article contains just such instructions, which describe in detail Electric meter connection diagram. Taking advantage of it , Connecting yourself will not pose any difficulties for you.

There are counters of various designs:

• mechanical and electronic
• one tariff and two tariffs
• direct connection and secondary (the secondary meter is connected mainly in power cabinets and switchboards, for example, at the input to multi-storey building, at substations, where very large currents flow, it is connected to the circuit through current transformers), in everyday life only direct-connection meters are used

In this article, we will look at connecting a single-phase direct-connection electric energy meter. It should be noted that the connection diagrams for mechanical and electronic electricity meters are the same.

In our example, an electronic counter with a mechanical reading mechanism is used.

Preparatory work

Before connecting the electricity meter, it is necessary to carry out preparatory work. Install a box in which all equipment will be mounted.

Most modern meters are modular. This means that they are installed on a special mounting rail, which greatly facilitates and simplifies the installation process. Also, household series of protective equipment are modular, these include:

• circuit breakers
• RCD (residual current devices)
• differential automata
• various adapter terminals and zero buses
• voltage limiters
• voltage indicators

They are installed in special boxes made of special non-flammable plastic. These boxes can be wall-mounted or built-in, and have different sizes, which depend on the number of installation spaces inside the panel.

The box used in the example is mounted, designed for 24 installation positions, has two DIN rails with 12 places each. Din rail is a metal plate on which modular equipment is mounted.

Boxing consists of two main parts:

• outer - protective cover with door
• internal, - which includes one or more din rails, their number depends on how many installation positions the box is designed for. And a zero bus, designed to distribute the supply zero between all outgoing wires.

Let's move on to preparing the box for installation. Remove the top cover. To do this, you need to unscrew the 4 screws securing the outer cover.

In front of us is the inside of the box. As you can see, it has two of the above-mentioned din rails.

And zero bus.

We mount the box on the wall. It is worth noting that according to PUE requirements(electrical installation rules), the installation height of the meter indoors must correspond to certain dimensions, 0.8-1.7 meters from the floor. Such requirements are due to the fact that the inspector or sealer serving the electrical organization would have the opportunity to take meter readings without the use of stools and stepladders. Optimal height installation, is the height of the average person's eye level, 1.6-1.7 meters.

IN depending on the wall material,We use the necessary fasteners, concrete dowels or wood screws.

And so, the box is installed. We proceed to the installation of modular equipment.

Installation of an electric meter and modular equipment

According to the PUE, a protective disconnecting device must be installed in front of the metering device (electricity meter). As a rule, in most cases, such a device is a two-pole circuit breaker. In the meter connection diagram, it performs the following functions:

1. Electric meter protection

• from short circuit,
• from fire, due to excess permissible load, for which the meter is designed,
• ability to perform meter replacement and maintenance work

2. Limitation of permitted power (regulated by the rating of the circuit breaker)

If necessary, you can read about in more detail.

In our example, the input protective device will be installed directly in the apartment panel, box. Also, in some cases, it can be installed in the floor panel, on the landing. Here, the main criterion is the method and possibility of filling.

Everything in the box must be sealed. If the service organization has the ability to seal the circuit breaker, then it is mounted in a box; if not, then in a floor panel. The machine is sealed with special stickers that are glued to the contact screws, top and bottom of the circuit breaker.The meter is sealed with plastic or lead seals.

Well, we've sorted out the sealing, let's get back to installing the electric meter.

Let's start with the installation of an input two-pole circuit breaker. Using a special latch located on the back wall of the machine, we install it on the upper DIN rail.

• without fail, on the back of the terminal cover of any electric meter, a diagram of a single-phase meter will be printed;

• and of course, a diagram of a single-phase meter can be found on the Internet.

Having studied the diagram of a single-phase meter on paper, let’s turn directly to the electric meter itself. Serial connection electricity meters Using a tester, multimeter or screwdriver-indicator, check the absence of voltage on the meter, after which all four wires are disconnected one by one using a screwdriver. When the meter is freed from all wires, it is dismantled from its installation location. Installation and connection of the new meter is carried out in reverse order. First, the new meter is mounted in place of the old one, then four wires are connected to the power terminals of the meter. The terminal cover is closed and the meter is sealed.

Serial connection of electricity meters

If the wire is stranded, lugs are installed at its ends, which are selected according to thickness and rated current. They are crimped with pliers (can be clamped with pliers).

When connecting, the bare conductor is inserted all the way into the socket, which is located under contact pad. In this case, it is necessary to ensure that no insulation gets under the clamp, and also that the cleaned wire does not stick out from the housing.

Attention

That is, the length of the stripped conductor must be maintained exactly. The wire is fixed in old models with one screw, in new ones - with two.

If there are two mounting screws, tighten the one on the far side first. Tug the wire slightly to make sure it is secure, then tighten the second screw.

After 10-15 minutes the contact is tightened: copper is a soft metal and is pressed down a little. Read how to do the wiring in your home yourself here. About the features of electrical wiring in wooden house written here.

Connection diagram for electricity meters in a communal apartment

The outgoing wire (a thick black line drawn) was led directly into the apartment and a small box with a set of necessary circuit breakers was placed there. Master electrician Often, on the inside there is a wiring diagram for the electric meter drawn on it to help you.

Info

Now you need to take a cable with a cross-section of at least 6 mm2 to make jumpers from it. You can buy 1 meter of VVGng 3x6 cable, cut it and make jumpers from the cores. Since the cores will different colors, then it is worth observing the color coding of the wires.

Important

This will prevent you from getting confused later. 1. We place the first jumper from the left pole from the bottom contact of the 2-pole machine to the contact of the electric meter “1”. This will be the “phase” coming from the network to the meter. When you insert the jumper into the meter, first tighten the upper contact.

Then check if the wire is fixed.

How to connect a control meter to an existing electronic one?

Below is the sequence of connecting the wires to the electric meter. By one pin I mean a vertical terminal block with two bolts.

1. We connect the incoming phase conductor to the first contact.
2. We connect the outgoing phase conductor to the second contact.
3. We connect the incoming neutral conductor to the third contact.
4. We connect the outgoing neutral conductor to the fourth contact.

In the picture below, the incoming wire is drawn on the left, and the outgoing wire to the load is on the right.
Practical diagrams for connecting three-phase meters, selection and installation. The diagram clearly shows that the phase load wire is connected to the second terminal, which will be pulled through the machines into the apartment. It’s the same with zero, only the input wire will need to be connected to the third terminal, and the load wire to the fourth.

ASTP forum

This can confuse an electrician who sees this panel for the first time and will need more time to understand how everything is organized in it. Personally, I always adhere to the opinion that we arrive at the machine from above and leave from below. To correctly connect a single-phase meter, we first of all need a single-phase meter circuit, which can be found:

• the documentation that comes with the electric meter is a passport, instructions or form for the meter, which indicates all the characteristics, serial number, dates of manufacture and verification of the meter, and of course #8212; the single-phase meter circuit itself;

• Additionally, the set of documents for the meter may also include an operating manual.

Official forum - Energomera JSC

The amount of electricity consumption determined by technical accounting (by meters in the main consumers) exists dispatcher 02/16/2018 07:43 why aren’t you creating a topic? Few people read the chat. If you turn on the sectionalizer while the inputs are on, then even with the correct phasing there can be a decent flow Andrey Aleksandrovich 88 02/16/2018 05:47 look, I have the following problem: there are two inputs from the RP coming to the substation, let's call it TP-1.
in TP 1 there are corresponding ABB safeplus cells, when sectioning one of the inputs on the high side, it knocks both inputs off the RP. phasing matches dispatcher 02/16/2018 04:37 there probably is, what issue are you interested in? Andrey Aleksandrovich 88 02/15/2018 09:12 Good afternoon.

403 forbidden

Re: Metering scheme - two electric meters

• Quote

After reading the messages, I will try to answer the questions that arise. I myself also had a lot of questions when trying to draw up a diagram.

Today we plan to get into the attic, and also study in more detail the electrical wiring in the panel. It is powered exactly as shown - two phases, zero. The house is small - two entrances, 8 apartments in each, 16 apartments in total.

I have more or less figured out this issue. There is active correspondence with the energy supply organization. The question is precisely this connection diagram. That the electricity meters are connected in series. Even if it’s a neutral wire.

Electric meter connection diagram, step-by-step photo instructions

Will it be cheaper than CE303 and what parameters will it control? The device itself costs approximately the same price of 12..15 thousand rubles. rugo wrote: In principle, CE303 suits us and should withstand the temperature, because will be placed in a closet outside. Naturally, at temperatures down to -40°C. Telemetry of transformer substations and similar units is based on similar wattmeters.

rugo wrote: And although the accounting is technical, it is interesting for the customer to see data not only on voltage, but also on phase “failures”, current consumption, power and energy. This is exactly what I meant. It is clear that you are primarily interested in voltage profiles for possible proceedings with subsubscribers. If the meter does provide such parameters, it is not operational, but often with averaging, because this is not necessary for energy accounting. Well, he stores the minimums and maximums for half an hour. and so on. You just have to decide 2 questions: 1.
If such an ICC is available, the meter can be replaced without removing the load and voltage at the connection, but by disconnecting all meter circuits in the test terminal block. Indirect meters These meters are designed for metering electricity at high-voltage connections of 6(10) kV and above. They are connected to the mains using high-voltage current and voltage transformers. If you are not a power engineer at a large enterprise, it is unlikely that you have come across such a scheme for switching on electricity metering, but I will still present the diagram for general development. How to properly connect a single-phase electric meter Also, ask at the local branch of the network company or read here the terms of energy sales that are necessary for sealing and registering an electric meter in order to complete all the work correctly and the first time.
It happens that it may not get into the far terminal block or it is simply not brought to a sufficient length. 2. How to properly connect the electric meter and circuit breakers. The second jumper “phase” from contact “2” from the electric meter should go to the group circuit breakers on the upper contacts. According to the PUE, the incoming wire must be connected to the fixed contact of the circuit breaker, i.e. to the top one. If you always do this, then later it will be convenient and you will immediately understand how everything is organized in the dashboard.

Some manufacturers, for example, Schneider Electric, indicate in their documentation that the wire can be inserted into their circuit breakers both from the top and from the bottom. I have seen in large panels, where there are many rows, that part of the load is connected to the lower contacts, and part to the upper ones.

Is it permissible to connect electricity meters in series?

Installing the meter on a pole To be able to carry out work on the electric meter, an input switch or automatic switch is installed in front of it. It is also sealed, and there is no possibility of putting a seal on the device itself, like on the meter. How to connect a single-phase electric meter with your own hands? We see that our filling does not fit into the existing free space. To do this, you need to cut out the excess plugs with a knife. We put the top lid of the cabinet in place... And close the door... That's all. The panel with the electric meter is ready for installation on the wall. Here I think everything is clear. Below I am posting a photo of one of the floor distribution panels of a typical five-story building. Maybe it will be useful to someone. Here, a long time ago, the electric meter, which is located below on the right, was replaced. The switch that was located before the electricity meter and the old black circuit breakers were excluded from the power supply circuit.