Why does a short circuit knock out an input machine along with a group one?
Hello. Introductory 50A, then group 10.16, etc., a total of 3 groups. In case of short circuit, a group and introductory machine is triggered on any group, i.e. the apartment is completely de-energized, which is inconvenient. Why does the introductory machine work? All circuit breakers are of the same firm and class.
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The opening automaton is triggered simultaneously with the group one, since they have the same delay time of the electromagnetic release. If the machines are of the same manufacturer, then it is always more likely that they have the same response time in the event of a short circuit. If the manufacturers are different, then the time delay may vary, but not the fact. In order for the input automaton not to work simultaneously with the group one, a selective automaton is installed at the input, which has a longer delay time for the electromagnetic release than the group automata.
Hello question is this? I have an aluminum 4mm2 cable. And the input is 10mm2, the C 40 machine. After the ouzo 63 meter, it costs. The rest of the C10 and C16 during a short circuit does not work, please tell me what to do. Thanks in advance!
maybe the machines need to be replaced, maybe the short-circuit current is very low, so they do not work instantly.