Automatic machines in a guard turn off

Hello! The current goes through automatic machines such 63A - 16A - 16A - 16A - 25A - 25A - 25A - 25A. From 63A, all automatic devices are connected with aluminum jumpers in the indicated order. 16A are heated. The insulation on the jumpers is already melting. Copper wires go out from 25A to the apartment (there is a 3 kW water heater, a 1.5 kW water heater, a washing machine, an electric stove up to 6-7.5 kW (in fact, we turn on 2 rings no more or just an oven + burner. From 16A to sockets and bulbs aluminum ones come in. Also from one 16A copper goes to street lighting of 0.5 kW to 3.5-4A (through 16A it is separate from those in the photo that the machine works as a switch and does not heat up at all; everything is checked on a separate power supply, so here everything reliably.) All machines are connected by aluminum jumpers as in the beginning wrote from one to the other. So the 16A automatic machines heat up as much as the insulation on the jumpers melts. Naturally cuts them out. At this time, street lighting + a washing machine + a 3 kW boiler can be turned on. Or street lighting + 2 electric stove rings + a boiler. Or an electric stove + boiler 1 , 5 kW + boiler 3 kW + street lighting. Maybe there are more combinations when they overheat, but so far they have noticed. The main thing on 16a machines at all may not be supplied a load or a pair of 14W bulbs.

Automata in the shield

Question. Why is that? An electrician came and did everything exactly that way. Spent a new wiring, ruled everything. Where did the electrician screw up or what could be the reason? On the phone, the electrician says you probably closes somewhere and refused to do anything. Fell in short. It seems to me that he was fumbling somewhere and now we have problems.
I need help as we will not find a normal specialist in our backwoods. So I myself can nakolkhozit so that everything is cut down)). Tell me what is wrong here. The house is 30 years old. All standards are divorced. We additionally connected only boilers, a washing machine and street lighting to a copper wire. The wiring does not heat up.



  • Admin

    Hello! Redo jumpers, use for this wire PV-1, copper, cross-section of 4 mm.kv.

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  • Admin

    In addition, I would like to note that the assembly itself is at 2-, an error is in error.
    1. Power should be supplied to the fixed contacts AB, as a rule these are the upper ones.
    2. Be sure to remake jumpers on copper 4 kV or comb better, as described above.
    3. Higher-value AVs should be closer to the input AB, that is, the farther from the input, the lower the value.
    4. Why introductory 63A? Enough for the described load 32A, edge 40A for selectivity.
    5. The most important and quick in my opinion is to change the jumpers themselves and double-check the contacts (stretch).
    Maybe someone else will advise. By the way, there are still a lot of comments, but they do not affect the operation and heating.

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  • Dmitry

    Replaced by a copper bar. Thanks, everything worked and does not get warm at all.
    Not all of course still checked. But it’s already noticeable that it has become better.
    But another question arose in the wiring to the apartment. Is the problem solved?The apartment is an aluminum cable thick as were the jumpers.
    Is it possible that somewhere there will still be a bottleneck or is this already a problem for the company serving our house?

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    • Admin

      Without seeing the shield itself alive and without checking the load, it makes no sense to actually advise. This shield must be completely redone, judging by your own words there are more than half of the aluminum, and this is a maximum of 16A. Since the wiring is old, I would not have risked 16, if wisely, then it is necessary to check the insulation of the old wiring and, according to the test, distribute the load. Write a written request to the service organization.

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