Another lie of the Russian media
No, there won't be any conspiracy theory to think about after reading the title. Everything is much simpler - we will talk about an everyday case that was slandered by the domestic media, thereby feeding the people with disinformation.A couple of days ago, on TV (I no longer remember which of the two main channels), the news was reported that household appliances had burned out in a certain apartment building, the reason for which was the 380 volt voltage that appeared on the network. Everything would be fine, but at the very least, remembering the school physics course, I was outraged by the explanation of this case, which was publicly announced on television: the rat gnawed through the neutral wire, as a result of which the phase gave 380 volts instead of 220 volts.
However, I graduated from school a long time ago, I could be wrong, just in case I decided to check with a physicist friend. He only confirmed my doubts: if the neutral wire is broken, electricity will simply stop flowing, there is no smell of voltage increase here. In order for the voltage to increase, it is necessary not to cut off the wire, but add, or rather, replace the neutral wire with the second phase, only then there will be 380 volts.
Even in this everyday case, the domestic media put noodles on the population's ears. What was it? Checking to what extent our population is ready to be duped? What can we say about those cases when lies are beneficial to those who are behind the media.
electric stoves and ovens can be connected to both 220 and 380v, so maybe the answer lies in this
ask Google, I asked, he replied that this is possible, what is there and how can I look in the bastard, you have your own hands, you will figure it out :)
A physicist friend is dumb as a felt boot. The house is powered by three phases, not one. Think. The neutral is deafly grounded, we tear it off. some apartments hang on one phase, some on another, some on a third. If the load were the same, nothing would have changed ... but it is not the same, so someone has a hundred volts in the outlet, and someone has almost three hundred. I saw it with my own eyes when a Tajik excavator hooked a cable with a bucket. I just had a tube TV set with a stabilizer and a voltmeter, it was three hundred volts for sure ... the TV set withstood, the Union is not your Chinese cellars.
In, for dummies in the literal sense) The video is good.
http://electric-tolk.ru/otgorany-nulus/
If it's purely spelled yes, it doesn't add up. And in practice, this deafness could be expressed in a rotten stub, which fell off a long time ago, pouring water, steam, all sorts of creatures ... age. In my Khrushcheb there was just a rusty bolt, that's all the deaf grounding.
Dad lives in my house, so there every year in the basement the water is up to ground level, the pipes are leaky, they don't fix it. No steel can hold up.
requiemmm
I agree.
I will say it as an electrician so that it would not be necessary not to waste time on trifles and put an RCD in the shield. Then there will be no problems due to zero. This is for those who do not need it, although in our time it is a standard thing.
Headbangbang
It's not even about the media, I was killed about a physicist friend. Hmm ........ not even words.
If the load on the phases is different, then the voltage may be more than 220 volts if the neutral wire is broken. But there it depends on what scheme the load is connected in.
It's all about the grounding system. Such a situation is possible with the TN-CS system if the common PEN is cut off (zero protective conductor, and not just zero, which is the same for a journalist). This is not taught at school, and the TS physicist is funny.
"In 2009, 79% of respondents trusted TV news, now - only 41." http://www.bbc.com/russian/news/2015/12/151216_russia_tv_news_trust
stalker7162534
And how many percent trust the results of "independent opinion polls"?
I understand it this way.
Roughly speaking, the apartments are powered according to the "star" scheme with a short-grounded neutral from a 3-phase supply transformer at the substation, one end of each of the 3 windings of which is grounded and as a working "organ" is zero. Accordingly, the second, ungrounded end of each winding gives us 220V potential relative to the grounded zero (the second end of its winding). With a loss of ground at a common zero, it turns out that the potential no longer comes from one winding, but immediately from two different (opposite) phases, roughly 380-400V, but not directly, but from all the e-mails included in this network. devices, which, of course, are powered in parallel. Therefore, the more email is included. devices, in the house where the ground is lost at zero, the higher the potential coming to lighting and sockets will be, and el. there are usually a lot of appliances in the whole house, therefore, almost "honest" 380V will come to the sockets, which leads to the instant death of the email. devices not protected from overvoltage.
So that "physicist friend" is absolutely incompetent in this matter, but they probably lied about the rat, since the cable going from the substation distribution post to the house has too large a cross-section and is attached to the power buses with thick bolts. In short, the "rat" was big, most likely even talking, if you understand what I mean ...
So that "physicist friend" is absolutely incompetent in this matter
. I also have a friend, a Moscow electrician, who says that each entrance in apartment buildings is connected to its own phase. That is, in each entrance there should be only two wires: phase and zero.