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in the event of a short circuit, the fuse blows on the cage instead of at home

obe 32142 7
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 12624353
    obe
    Level 11  
    Hello

    I have a problem, I live in a fairly new block (2008) where there is quite a "modern" electrical installation, but when there are short circuits in the house, the main fuse from the apartment in the staircase "shoots" instead of the fuse in the house responsible for the circuit or the over-current circuit breaker in the apartment - maybe someone will be able to advise me something constructive?

    I would like to add that I found this condition when I bought an apartment and I do not know who was building the electrics in the apartment: /
    The installation is three-phase because the kitchen is electric.


    I attach two photos:
    - fuses in the staircase

    in the event of a short circuit, the fuse blows on the cage instead of at home


    - fuses in the apartment

    in the event of a short circuit, the fuse blows on the cage instead of at home
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  • #2 12624408
    mrst
    Level 18  
    The reason is the lack of selectivity. The miniature circuit breakers operate randomly in the event of short circuits. The use of fuses or a selective switch as a pre-meter protection should help.
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  • #3 12624441
    obe
    Level 11  
    Unfortunately, I cannot replace this main fuse, it is in a locked cabinet to which I theoretically have access, I have to combine in home fuses ...
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  • #4 12624516
    .Jack
    Electrician specialist  
    obe wrote:
    I have to combine in home fuses ....

    Nothing will come of it, no combination will help without interfering with the box in the stairwell and replacing the D 25A circuit breaker with a selective overcurrent breaker or a fuse. And it does not matter whether they are A, B, C or D because the electromagnetic releases have the same activation time.
    PS
    And what are the experiments that my friend conducts in the cottage that he causes short circuits all the time. In a properly operated electrical installation, short circuits are rare.
  • #5 12624530
    Olton
    Level 13  
    The installation thus secured works properly. You need to find out the cause of the short circuits and not let them happen.
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  • #6 12624541
    karolark
    Level 42  
    Olton wrote:
    The installation thus secured works properly. You need to find out the cause of the short circuits and not let them happen.


    How does it work properly? design error or installation of wrong pre-meter protections.
  • #7 12624552
    elpapiotr
    Electrician specialist  
    My friend Karolark this is normal in our country.
    Elsewhere they give a "B" for the predecessor, and ZE picks up.
  • #8 12624607
    obe
    Level 11  
    I was naively hoping that replacing the fuses with those that would react earlier than the pre-meter one would be a solution, and here the linden :(

    I know the reason for the short circuit very well: drilling (accidentally) into the wall where the wiring is rushing (take it easy ... I have already bought the detector) or sporadic and conscious combining with the current (to all who write again that it is bad and not good ... thank you for the advice and I assure you that I am aware)

    in general, I am a bit resigned that I have to stay as it is, because I had a short circuit only 3 times, but I think that only the circuit fuse should shoot every time, as it was in the times of fuses: /


    greetings

    And I was naively hoping that my friend would use the search engine!
    [Akrzy]
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Topic summary

The discussion revolves around an electrical issue in a modern apartment where the main fuse in the staircase blows during short circuits instead of the circuit breakers within the apartment. Participants highlight the lack of selectivity in the electrical installation, suggesting that the use of selective overcurrent breakers or fuses could improve the situation. The original poster expresses frustration over the inability to replace the main fuse due to it being locked in a cabinet. They acknowledge the cause of the short circuits, which include accidental drilling into walls and intentional electrical experiments. Despite experiencing short circuits infrequently, the poster believes that the apartment's circuit fuses should ideally trip instead of the main fuse.
Summary generated by the language model.
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