Electricity meter connection diagram. How to connect the electricity meter correctly

After installing the wiring in the house, you must connect the electricity meter according to the scheme corresponding to the specific model of the device. The electric meter is designed to measure the amount of electricity that is consumed by the consumer. Installation of the meter should be carried out as competently as possible, so that subsequently there is no short circuit. It is recommended that you entrust all the work to specialists; not everyone can do it independently.

Varieties of counters and their features

There are several types of devices:

1. Working on direct and alternating current.
2. Three-phase and single-phase.
3. Single tariff and multi tariff.
4. By the type of mechanism, one can distinguish the following: electronic, hybrid, mechanical. Most often, hybrid electric meters are used, how to connect it correctly will be discussed later.
5. Inclusion of counters direct and transformer.

Today on the market you can find electronic and induction devices, they have a different mechanism of action and measurement accuracy.

Induction and electronic models

Before you connect the electricity meter correctly, you need to decide what kind of meter you need. Obsolete induction devices have almost been supplanted in recent years thanks to government assistance. They have a big drawback - they are simply deceived. Unscrupulous consumers of electricity use this and “rewind” the dial back.

Electronic view counters are universal, they have high measurement accuracy. They can be easily configured for use in multi-tariff modes without any special effort. Therefore, if you live in a region in which there is a daily and night tariff, it is better to give preference to an electronic meter. In this case, you can save on electricity.

Meter Classification

The connection diagram of the electric meter depends on how many phases it is designed for. It is not necessary to use three-phase meters for a single-phase network . To calculate the rated current, you need to find out what rate of active power per person is set in your village. Then this value must be divided by the voltage of the household network (380 or 220 V).

Accuracy classification of the meter: the higher the number defining the class, the higher the measurement error. In the event that the device is connected in a building in which the total current consumption is over 100 A, it is necessary to install special current transformers. Otherwise, it will not be possible to install an electric meter. But to independently install such systems is not recommended. Contact qualified personnel. And when buying a meter, you need to make sure that there is a seal on it. Make sure that it is installed no later than one year (for single-phase devices) and two years (for three-phase).

Legality of self-connect

In order to avoid problems with energy sales, you must first contact your local representative office and conclude an agreement. You need to get permission to carry out the planned work. Power sales employees must give you documents listing all the requirements and the wiring diagram for the meter. Step-by-step installation instructions must be studied in advance, it is advisable to print it and always keep it close to you.

According to the law, it is necessary that electric meters, which keep records of energy consumption in private houses, be installed outside the residential premises. This is necessary in order for any energy sales employee to gain access to the device. In apartments, electric meters are installed on the landing.

Single-phase meter connection diagram

And now we will consider what are the schemes for connecting electric meters. The simplest option is a single-phase connection, which is made using six wires. Three wires are connected to the input of the meter:

• zero;
• phase;
• grounding.

The exact same wires are connected to the output. It is advisable to install a circuit breaker in front of the meters to increase the safety of the house and the operation of the power supply system. If necessary, one small device will be able to de-energize the entire apartment or house.

Of course, one may ask: can energy sales employees be able to “punish” for such installation? To prevent this, it is necessary to seal the circuit breaker. The design of the electric meter has a bus - a copper strip, fixed with dielectric clamps. With this connection method, you can connect several wires of a small cross section into one larger one.

Requirements and Rules

To install two-tariff electricity meters (the connection diagram for them is almost the same as for single-tariff), you must adhere to the following requirements:

1. Installation of an electric meter should be carried out at a temperature above +5 degrees. It must be remembered that cold is bad for any electronics. And working in the warmth is much more convenient.
2. If you need to install the meter on the street, build a heated hermetic cabinet for it. All materials that may be required for this can be purchased at specialized stores.
3. The device is installed at a height of 1 to 1.7 m above the surface of the earth or floor. In the event that the device is located lower or higher, it will be problematic to take readings from it.

These are the basic requirements, you can learn more about the rest from the representative of energy supervision.

Mounting Materials

First of all, it is necessary to make a choice of the connection scheme of the electric meter. Installation should be done only after you have all the necessary materials available:

• tight guard and electric meter;
• circuit breakers designed for maximum current;
• insulators;
• tool with insulated handles;
• fastening accessories - nuts, screws;
• DIN rail
• wires.

Next, you must act strictly according to the instructions.

Walkthrough

Make sure that the electricity meter connection scheme you select is suitable for the network.

The first step is to find out how many phases are in your network. Based on this, you can calculate the required number of circuit breakers. Further steps for installing the meter:

1. Install the meter in the shield, the fasteners are carried out using special clamps.
2. Mount the circuit breakers, they are installed on the rail, fixed with a latch.
3. The rail is fixed with screws to the insulators in the shield.
4. Install the protective and grounding buses, they must be mounted either directly to the rail or to the insulators that are in the protective shield. Tires should be kept at a sufficient distance to prevent short circuits. First you need to connect the load to the switches, only after that the machines are connected to the meter. At the last stage, the meter is connected to the network.
5. Connect the load.
6. Mount jumpers connecting the machines.
7. Connect the electric meter to the load (electricity consumers).
8. Fasten the shield housing to the wall.
9. Check if all wires are connected correctly. Only then apply food to the house or apartment.

If the connection scheme of the electricity meter is selected correctly, then no additional steps will be required. You just have to turn to the power supply, so that the experts check all the equipment and install their seals.