Instructions for assembling a three-phase electrical panel

In the world of industry standard is three phase 380 (400) volts.All professional equipment used in the production of works by such stress.Also, three-phase wiring is put in shops, homes, offices and schools.It is possible to collect electricity metering plate so as to receive the regular output network 220.We will not go into the jungle of electrical engineering, just say, if you measure the voltage between L1, L2 and L3 and the voltage is 380 volts.But between L1 and N (neutral);L2 and N;L3 and N is 220 volts.Should I bother with 380 volts in a block of flats apartment, simple answer is no.But in a private home is to get hold of the three-phase wiring in the economy.Once you come to us with the question of how to collect shield energy accounting 380V with their hands, then we will try to help you.

Assembly Procedure

After receiving permission to connect to the three phases and technical conditions, proceed to the self-assembly of the shield.Input will be mounted in a sealed box, which you need to collect on the outer wall of a private house or a pole.It set three-phase meter and the circuit breaker, as shown in the photo below:

Near I organize grounding device, according to the rules.Introductory shield electricity metering will be sealed and free access to it will not.So the first thing you need to self-assemble a three-phase distribution board, allocating customers at will.

From the opening to the distribution switchboard Boxing Starts 5-core cable L1;L2;L3;N;PE, or 4-wire L1;L2;L3;N provided the use of the grounding circuit TN-C-S or organization of another device near the ground shield.

to connect the three-phase household equipment to collect the shield will need to be as follows:

Assembling shield accounting for 380 volts runs stranded wire cross-section of not less than 4 mm, colored insulation.Suggested colors - L1 Red, L2 White, L3 black, N blue, PE yellow-green.To set up the phase plate, you need to carefully look at the safety devices that bear the mark phase to connect the wires.This diagram presents the four-pole RCD protective devices, with an additional terminal N, in conventional machines, this terminal may be missing.In turn installed in a cabinet on DIN-rail devices begin to switch, measure the wire from L1 to terminal L1 following the device him, with a margin of 30%, for the convenience of installation and operation.
Such operations are carried out with all terminals, but keep in mind that pre-cut lengths is not recommended, because the notice in the assembly process that L1 length of the interval is much shorter than the length L3 of the mounting.Even better to collect a shield, using a three-phase DIN rail, which saves space and minimizes the chances of something confused.Separately, put a zero bus and bus PE, which is required to connect with the body guard of electricity metering.

If you have a flat or a house has a high equipment, you need to collect on the plate 380 in such a way that each phase was uniformly loaded with single-phase consumers.An example of such an assembly of three-phase electrical panel in a private house you can see below:

In this scheme, the electrical phase shield divided into separate load across machines, single and differential switches.L1, L2 and L3 are uniformly loaded consumers, according to a pre Calculate the expected load.

is not recommended to do so - one phase on the socket, and the other for lighting, and the third for any other needs, asit is important to distribute the load between L1, L2, L3.If one phase is excessively loaded, there is undervoltage on it, at the same time on the free voltage rise occurs.This phenomenon often seen in the winter, in the residential sector.If your neighbor phase included a powerful consumer, you have in the house began to dimly light the lamp lighting and refrigerator became strained buzz.Know this your drawdown phase.And at the same time at the other neighbors, is fed from the other phases, beginning to shine brightly and explode lamps burn out equipment, and even a fire may occur.

With regard to the three-phase load, this bias could be fatal for her.To avoid this, when you decide to collect a shield, an additional set of phase control relays for three-phase mains voltage.To perform single-phase connection voltage relay.Check the load distribution can be with a multimeter Clamp, which is shown in the photo below.

Well, the latest version of the assembly panel power metering system at 380 volts - mixed, when household power present and three-phase and single-phase power consumers.In this case, collect the switchboard should be as follows:

Tutorials Installation

If acquainted with the information you do not fully understand how to assemble a three-phase plate, we recommend to view videos in which the procedure is shown graphicallyassembly:

that's all that I wanted to tell you how to collect shield energy accounting 380V own hands.As you can see, you can connect only with certain skills, becausethe assembly must take into account a lot of nuances, such as load balancing and automatic selection of the correct rating.

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