The machine does not work when short circuit on one of the two outlets
Good afternoon! Faced such a problem - there are 2 sockets in the room. There are no consumers. I insert a plug with wires and make a short circuit to check the operation of the AB, it is one on both sockets. On one outlet with a short circuit, AB is triggered, on the second - not. AV serviceable, new. Wiring to aluminum sockets in a prefabricated house 30 years. What could be the problem? Why doesn't AB work?
Hello! Could it be the big resistance of the phase-zero loop? Maybe the contact on this line is bad somewhere. It turns out that then the short-circuit current is insufficient for the operation of the AB. When you make a short circuit in this outlet what happens? You can check differently with less danger - load the line more than 16A, for example 20
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Hello! With a short circuit on a "bad" outlet, nothing happens - only sparks on the wires that I close. AB does not work, the outlet is still energized, you can again make a short circuit.
At the same time, everything works as it should on another outlet in the room - with a short circuit, the machine cuts everything off.
The thing is that I practically do not use this outlet. But on New Year's Day, a tree is connected to it with all the illumination. And the quality of garlands is not always good, so I decided just in case to check - if something closes, how AB behaves. And here it is ...
I would like to understand in which direction to "dig": to change the outlet itself? check wiring to a power outlet?
Put next to it a small shield and an automatic machine at 6A - enough for the Christmas tree, and you will sleep better.
And what's the point of replacing the outlet? You can check for fun - if the contacts are good, clamped and not oxidized, then everything is fine.
There are still UZO sockets, but this is not quite what it is from current leaks. And there are also surge protectors (extension cords) with overload protection - this is rather what you need.
Well, really - you need to check the wiring to the outlet.
You can try to turn off the voltage, short-circuit the wires in the socket (it’s better to twist it or connect it well with a terminal block, check the resistance of the multimeter probes, the resistance of the shorted wires in the socket (to exclude the error later).
And then: turn off all the switches, pull everything out of the sockets and measure the line resistance - it should be low, usually on the multimeter the resistance of the probes is only 0.7-1.5 Ohms, plus your short circuit.
Subtract what you measured from the above from the total resistance of the line from the shield. Find out her resistance. Divide the number 220 by this and get a short-circuit current.
This is rude and rather arbitrary - but you will have approximate ideas about the state of this line.
Thanks for the comment!
I also thought about a small shield with a separate machine gun - most likely I will do so if everything turns out okay with the socket.
At the end of the topic.
The issue was resolved by replacing the outlet.He took off the old Soviet, shortened the wiring wires - AB worked as expected. So it was a power outlet, eventually replaced with a new one.
Thank you all for participating.