Connection diagram three-phase meter. Installation and connection three-phase meter direct connection

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2018-03-19 03:55:27

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Wiring Diagram for three-phase meter is about the same as in the case of using single phase. Any house or apartment must be put into operation only after will be installed electric meters. According to regulations, installation works can only be done only by those people who have been trained, and they must have a permit to work in electrical networks up to 1000 V.

But this installation of counter, with regard to the mounting elements and connections of the metering device directly to the loads, then these manipulations can be performed independently. Electricians should only test the whole system of power supply, then connect the meter to the input to run all the electrics.

Basic requirements when connecting

connection diagram three-phase meter

All the basic requirements and features of the connection specified in the EMP. But be sure to consider the following features:

  1. The Counter should be set with maximum protection from the action of weather conditions. Be sure to install them in special boxes made of non-combustible materials. The box should be sealed, if you want to install it on the street, and should be able to manage the testimony. In front of the indicator should be transparent glass.
  2. The Meter should be installed at a distance of 80-170 cm from the surface of the earth.
  3. Connects the electric meter only with the help of copper wires. Their cross-section must correspond to the maximum load current. These data can be found in the technical specifications. If we are talking about apartments, then you must use wires with a minimum cross section of 2.5 sq. mm In case of single phase is the maximum current of 25 A. To date, this is a very small value, since appliances have more power.
  4. Do not use uninsulated conductors, as well as the presence of different branches and twists.
  5. When using three-phase meters should be checking at least once a year.

Where to put a counter in the apartment?

If the counter is set in an apartment building, the place of its installation is entirely governed by the existing project. It can be installed in the apartment, in a special panel or on the landing.

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connection diagram three-phase meter Merkuriy

And in that case, if it is installed in the apartment, it is advisable to place it as close to the front door. It is much easier, since the load connection is running better. In addition, the Supervisory authority will be easier to check the readings.

Installing counter in a private house

In that case, if you decide to install in a private house electric meter, you can use several options. It is allowed to install the meter on the pole — in the yard or next to him.

But it is best to install in the room, as in this case, the weather conditions will be less to influence it. But if the electricity supply need only be installed on the street, you can make installation on the wall, in the sealed box.

But circuit breakers, which protect different groups of consumers, you need to install in another box placed inside the building. It is necessary to consider the fact that all the wires were visually examined.

To ensure the possibility of carrying out works directly on the electric meter needed to mount the circuit breaker or switch. He must be sealed separately from the meter.

Wiring Diagram single-phase meters

There are two types of electric meters for household 220 V:

  1. Electronic.
  2. Mechanical.

The type of metering they can be:

  1. One.
  2. Time-based.

connect three-phase meter connection features

The Difference in single-rate and dual-rate connection no, connection diagram is the same. The difference is only in the internal components. But for the average consumer this "filling" is simply unavailable.

On the terminal plate in any single-phase meter has two pairs of contacts. On the same terminal block, you can see a detailed connection diagram. In General, wiring diagram three phase counter “mercury” is almost the same as in the case of single-phase, only more wires.

Connection

According to the diagram provided in the terminal block, the procedure is:

  1. To contacts "1" and "2" is necessary to hold the phase of input power cable and consumers. First, you connect the phase wires of the load, and after - only input.
  2. On contacts under the numbers "3" and "4" you need to connect the neutral wire. Moreover, the contact "3" is zero from the wire water, and "4" is removed and it goes to the consumers.

Wiring Diagram for three-phase electricity meter is slightly different, will be discussed below. The only difference is that a little more contact.

A Little about the wires

All connections are made using wires that need to be cleaned no more than 2 cm, it is Desirable to refer to the installation instructions, all these data it contains. In that case, if the core wire is used, it is necessary at the ends to make special tips. Need to be chosen according to the rated current and thickness. Definitely need to overflow them with special nippers or pliers.

wiring diagram electric meters

The Stripped wire must be inserted all the way into the hole located under the ground with contacts. Be sure to see that clip did not get a piece of the insulation. It is unacceptable that the bare wire peeking out from under the hull. Connection diagram three-phase meter shown in the figure below.three phase electricity meter connection diagram

Connections are made in the same way as with single phase.

In Other words, the total length of bare wires should be accurately maintained. On older models of electric meters fixation is performed by means of one screw, and the new two. In this way you are connecting three-phase meters. The connection features of the metering device are the same as with single phase.

In that case, if you are installing a new meter, you must first tighten the farthest fixture, and after making sure that it is fixed, fully tighten the second. Ten minutes later you need to pull up contacts, as copper can be a little crumpled.

Connection three-phase meter

For the power supply of 380 volts is characterized by three phases, therefore, the metering devices are slightly different. Immediately struck by the fact that the electricity a much larger number of contacts. If you pay attention to the connection scheme, it would appear that the inputs and outputs, as well as neutral side-by-side. Wiring diagram for electric meter looks like this:

  1. If the phase with the letter “And” is connected to the first contact, it is removed from the second.
  2. Phase “In” is connected to the 3rd contact and removed from 4. All the rules and connection procedure similar to that described above, but with a greater number of conductors. First, you need to clean and align them, and then install the connectors and tighten.

Be Sure to meter to set the automatic switch, which is sealed. After metering device mounted box with breakers, which is removed from the voltage applied to the load. It is advisable to use a residual current device that will not allow electric shock.

Differences between three-phase meter from single-phase

Single-phase devices allow for registration of electric energy only under the condition if used two-wire network. Three-phase metering devices are used in networks 380 V 3 - and 4-wire type.

installation and connection three-phase meter direct connection

A single-phase network is often used to connect private homes, offices, sleeping areas. In other words, those consumers who have a power not exceeding 10 kW. In some cases, you may need to install and connect three-phase meter direct connection.

And in this case it is necessary to produce a given power consumption with single-phase meters. They have the main advantage — it's simplicity of design, ease of installation, and most importantly, they are very convenient to use.

Using the three phases in everyday life

But the problem is that in everyday life uses a lot of electrical appliances of high power. That is why many homeowners prefer to transfer power to three-phase network. If you believe the technical conditions that are to connect to networks, powered by 3 and 1 phase is approximately equal in power.

connection diagram single-phase and three-phase meter

But the advantage of using three phase power is that you can connect various electrical devices directly, without...


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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