What makes a working zero look like a dead zero. What is so zahisne zanulennya - the scheme is the principle of work

Zeroing to special connections metal parts electrical installation (electrical installations) to neutral. It is not necessary to reach the metal non-strumming parts of the possession, as in the normal (working) mode it is not found (and not guilty to change) under the pressure. Neutral, in which case it is connected, may be deafly grounded.

Three-phase electric wires- tse neutral of the generator or power transformer, in a single-phase line - tse dead-earthed dzherel zhivennya.

A null conductor (do not stray with a null working conductor) is such a conductor, which is a metal zeroed part of the electrical field with a dead-earthed neutral, which is suitable for a generator or a power transformer.

Meta zahisnoy zanulennya - secure electrical security in different short hum on the metal body of the electrical installation or electrical installation.

Zeroing principle

Zahisny zanulennya pratsyuє offensive rank. Yakscho when filed elektrichnomu zhivlennі vіdbuvaєtsya Hit Fazi (vipadkove potraplyannya abo probіy іzolyatsії phase provіdnika) on metalevy housing іz of vanishing, then vinikaє shorter zamikannya, rіzko zbіlshuєtsya values elektrichnogo Strum that spratsovuє aparata Zahist (automaticity vimikach) abo peregoraє fusible link zahisnogo zapobіzhnika, team itself znestrulyuyuchi electrical installation or electrical installation.

Opir zahisnogo zero conductor can be even low. This is necessary in order to secure the rіven struma of a short chime, sufficient for a zahist. Tobto. value of struma k.z. Might be enough to make sure you have a good device.

If the electrical control is simply grounded, then, for example, in case of a breakdown of the phase on the body, a short-circuit strum may be insufficient in order to activate the automatic switch, or the fusible insert of the fuse burns out.

For those that the neutral is grounded on the generator or transformer, it is safe to bring the voltage to the dot on the case low. Tobto. zahisne zanulennya you can vvazhat your kind with a variety of grounding.

Video - Zeroing and grounding - why is it different?

Schemes

Use a sprinkling of schemes, with which you can see the background of zeroing.

TN-C system

Enough simple system, For which zakhisne zanulennya vanishes. It has a zero conductor N and a zero conductor PE for all the time combined into one double conductor PEN. For the implementation of the neutral grounding on the TN-C system, it is necessary to reach the highest possible levels to the system of potential equalization, as well as to expand the transverse cross section of the confused PEN-conductor.

Zeroing on the TN-C system is fixed in three-phase electrical lines, and in single-phase lines such a zero is categorically fenced.

This system is a combination of N and PE conductors in part of the border, starting from electric dzherel eating. Behind this system, zeroing of the electric field is allowed in single-phase lines.

Zastosuvannya area

Zakhisne zastosovuetsya zastosovuetsya in single-phase that three-phase meshes snake struma up to 1kV. Merezha is guilty of buti with a deaf-earthed neutral.

Rechecking the effectiveness of the neutral grounding

The essence of the zahisnogo zeroing is that, at the time of a short phase flicker on the case, the electric power has become automatically turn on ushkodzhenoy dіlyanki lanceug. In order to reconsider the scales effectively vykonano zakhisne zanulennya, it is necessary to measure phase-zero opir loops at the most distant view of the living point. Tse allow vyznachiti, chi spratsyuє device zakhistu at times of single-phase short circuit. on the body.

Opir loops phase-zero vymіryuєtsya for the help of special vimіryuvalnyh priladіv. Attach two probes for vimiryuvannya phase-zero loop. When you die, one probe is connected to the phase, which is die, and the other - to the zeroed part of the electrical control.

As a result, the value of the phase-zero loop support is determined. Knowing the value of the support and the value of the tension of the life, according to the formula of Ohm's law for the lancet, it is possible to loosen the strum of a single-phase short flicker, the value of which can be greater (or one) than the strum of the spratsovuvannya of the outbuilding.

It is permissible, for the zahistu lancer in the form of strum shifts and short chimes, an automatic switch is installed, the strum of the mitt’s spratsovuvannya is 100A. The value of the loop support phase-zero is equal to 2 Ohm, the phase voltage in the measure is equal to the standard value of 220V.

Razrakhovuemo value of the struma of a single-phase short flicker. For Ohm's law I \u003d U / R \u003d 220V / 2 Ohm \u003d 110A.

Because rozrahunkovy strum k.z. more lower strum mittego spratsovuvannya (vіdsіkannya) automatic vimicach, then the zahisny zero will be effective. Yakby rosrachunkovy strum k.z. If we have less strum of the automatic spratsovuvannya of the machine, then for the efficiency of the zeroing, it was possible either to change the automatic vimikach to an attachment with a smaller spratsovuvannya, or to solve the change of the support of the phase-zero loop.

Most of the time, in rozrakhunkah, the spratsovuvannya of automatic vimikach multiply so the ranks of the coefficient of reliability Kn chi coefficient of reserve. Rich at tim, scho vіdsіkannya vіdsіkannya vіdsіkannya vіdsіkannya vіdsіkannya vіdsіdі vіdpovidaє znachennuyu znachennu, tobto. then, it’s possible to sing a splurge, with which and to be introduced at the rozrahunka of the appointments, the coefficient. For old automatic machines, Kn can be increased, for example, 1.25 or 1.4. For new modern automatic wines, you can upgrade to 1.1. Tse s tim, new aparati zahistu pratsyut more precisely.

Zeroing of the electric circuits of critical conductive elements of electrical installations, if they are not in a normal state under the voltage, with a neutral dead-earthed point of a transformer or a generator, in electrical circuits triphasic struma; from the grounded point of the dzherel in electrical networks fast strumu; z dead-earthed vision of a single-phase electric struma. Metoyu vikonannya zanullennya є zabezpechennya elektrobezpeki.

Grounding is grounded Tim, the effect of a short hum is out of the question. As soon as the vanishing has been expanded on the variance, it is more less equal, and the null conductor is mainly responsible for its functions, then in such a way the “zero” is chipped to the body of the electric motor. A short buzz occurs when the voltage of one phase hits the body of the electric motor.

When you spratsovuє vіdklyuchennya difavtomat or zvichayny automatic vimikach. It is also necessary to indicate that behind an additional metal bus bar, which is grounded, all electrical installations are connected to each other, as if they were brought to the ground circuit of the grounding of all buds.

How to zero out the zeroing of the electric power

We gave a rozpovіmo about those, the stars of zahislennya zahishlennya trapplyaє to our booth, and we look at the way in the transformer substation and that we can safely see the zvіdki znulennya near the apartment. It starts from the same grounding from a dead-earthed neutral - from a grounding attachment to the neutral of a power transformer.

Neutral at once from the triphasic line is squandered at the front of the shaf. It looks like it will be spread on electrical panels, which are found on the surfaces.

In it, a working zero is taken, making it at once from the phase, the phase of the voltage is more important to us. The name "working zero" is due to the fact that it is victorious for electrical installations or electrical appliances.

Let's take from the electrical panel and set it to zero, which can be electrically connected to a dead-earthed neutral, that settle down zahisne zero. It is necessary to know about language, what is in Lancius zahisnih zanulyuyuchih conductors none switching devices(automatic, knife switches toshcho), as well as the guards are not guilty buti.

Zastosuvannya area

Zahisne grounding vikoristovuєtsya in electrical installations voltage up to 1 kV:

1. - at the railings of a permanent electric struma from the grounded middle point of the dzherel;
2. - in single-phase electrical circuits of a replacement stream from grounding lines;
3. - in three-phase electric circuits of a replacement stream with a grounded zero (TN-S system; as a rule, circuits 660/380, 380/220, 220/127 V);

The establishment of a lancet strum of a single-phase short hum (to make a hum between zero and phase-dependent conductors) occurs at the time of the phase drout fading to zeroing of the body of the slower. Poshkodzhennaya electrical installation is switched on in the form of a life line in the event of a spratsovuvannya zakhistu, which is called by a single-phase short flickering strum.

For quick switching on of the actual electrical installation, automatic switches and fuses can be switched on, which are installed for short-circuit protection. Also for tsієї meti zastosovuetsya magnetic starters with a thermal protection of a vbudovanogo type, contactors with thermal relays, for the help of which, a protection is provided for such an intrusion.

The principle of dії zahisnogo zero

A short hum occurs when a phase wire (voltage) hits a metal case, connected to a null conductor. At the same time, the increase in the strength of the struma in the lance is fixed to majestic values, after which it is necessary to save the equipment, as if they turn on the line, so that the wrong attachment can live.

Hour of inclusion in the automatic mode of the power supply for the phase voltage of the line 380/220, apparently up to PUE, is not guilty of overshooting 0.4 seconds.

For the purpose of neutralizing the vicor, specially recognized conductors are used, for example, the third core of the cable or the wire in different single-phase wiring.

The “phase-zero” loop is to blame for the mother’s small opir, even if only in such a case, the inclusion of a sound apparatus is required at the transmission by the rules of the hour. Therefore, effective zeroing can be reached only with high quality of all plants and installation of the fence.

Zanulennya allows you to safely connect to the electrics of the wrong line, and th, grounding of the neutral, low voltage dotik on the body of the electrical attachment. Zavdyaki tsomu ymovirnist razhennya human body electric jet turn off. The neutral is grounded, which gives the reason to call the grounding the same kind of grounding.

Father, like the basis principle of dії zahisnogo zero actuates a changeover to the case on a single-phase short-circuit. for vikliku spratsovuvannya zakhistu great strum, kіntsevy metoy є vіdklyuchennya vіd merezhi poshkodzhenoї elektrichnі ї installation.

Why is the apartment unsafe

Zanulennya signifi- cantly strikes as grounding. Let's try to look at the report. Vіdpovіdno to PUE, vikoristannya on the butovy level of such a navmisny zakhistu, like a zero, fenced through її nebezpeku.

Ale, regardless of those who practice such a system, it is only to blame for industrial virobnitstv, many who put її і at their apartments. They go to the farthest point of perfection, zakhist, zokrema, at the link with the other option, or through marriage the knowledge of this sphere.

True, you can be sure, but the consequences will be far from the best. Dalі on the butts we can look at deakі situation, yakі can be blamed for the time of the apartment being zero.

1) Zeroing at sockets

In some cases, it is suggested that the grounding of electrical appliances be used for the additional jumper of the terminal of the working zero in the socket on the back contact. Such a method of "grounding" does not comply with paragraph 1.7.132 of the PUE, even if it transfers the zero conductor of the double-wire line as a depletion of the working zero one hour.

In addition, when entering the apartment, sound the device, the appointments for switching as a phase, so zero, for example, a packet or a two-pole device. Ale commute the null conductor, which vikoristovuetsya like zahisny, fenced. Tobto, it is not possible to win as a good conductor, a lancer of such a switching device.

The need for grounding with a jumper in the rosette is due to the fact that the cases of electrical appliances with a damaged zero zero in any place will be phase voltage. When shaving zero dart the robot of the electric receiver is interrupted, and even so, such a conductor may look unstriking, so careless, which, obviously, will help the situation.

You can only show, how hard it is to make such an outlet, so turn on the machine before it. In this case, you can make a jumper, so that you get a "zero" contact from the suffocation. I, yakbi vіdgorіv "zero", then cleaning machine I would change into a “drive in”.

As soon as an hour is accepted by a human soul, the zero "snot" will hover in the rosette, before the boiler is connected, such a person is simply "passed" by the strum. That is why it’s so quiet at the apartment in the region that it’s not safe, that yoga is fenced off.

2) Intertwined phases and zero

Having looked at the offensive butt, you can inadvertently shoot the hired hand at the double-pipe riser. Often when zdiisnennі be-yakikh repair robots at the Budinkovo ​​electric state, the zero "N" is gradually changed by the months from the "L" phase.

The wires in the electric switchboard in the booths with the double wiring did not work, and if there were any robots at the shield, some electrician could switch the zero and the phase of the subdekudi - the cases of the electrical appliances at such a time would appear under the phase voltage.

It is necessary to remember obov'yazkovo about the temple of not safe vikonannya zahisnogo zanulennya in dvuprovіdnіy sistemі. To that, vidpovidno to the rules, it is fenced!

3) Vіdgoryannya zero

What is the “spotlight of zero”, or the realm of zero, you know a leather electrician, but far from a skin saver of electricity. Let's try to understand the meaning of the phrase, and find out, what kind of trouble in the presence of zero?

Even more often, shaving the “zero” is fixed at the houses with old wiring, which is used for the design of such fireboxes of about 2 kW per apartment. Obviously, the current equipping of apartments with various electrical appliances significantly increases these figures.

At the time of "zero" shading, phase peroxidation can be carried out at the transformer substation, as it is powered. rich-surface booth, in a shackled electrical panel or in a shield on the exit maidanchik of the booth, ruffled afterward shaving of the electric line. The result may be that up to one part of the apartments have a reduced voltage, and to another - increased.

Reduced voltage is unsafe for refrigerators, air conditioners, split systems, wind turbines, fans and other equipment with electric motors. If there is a need to increase the voltage, then with a new one you can get out of tune, be it some kind of accessory to the butt technology.

The skin of a human being should be covered with food for safety at his widow's booth. Especially if you are talking about small electrical appliances. A small breakdown or a small flicker is enough for the stench to transform on deadly unsafe objects.

I’ll especially not be safe in the booth - just fit it, like a boiler and a clean machine. On the right, in that the stench is constantly in contact with the water. And there, as it seems, it transmits the electric jet the best. With the worst development of the situation, you won’t need to hang around the body, it’s enough to step on the water.

The consequences of the stroke of the strum are more low serious to the grain of the heart. For that very thing, it is necessary to work everything possible, so that a leather butt fitting at the booth would be safe. At the same time, there are two main methods of zahistu: zeroing and grounding. Why stinks one kind of one, and in some ways varto zastosovuvat the first method, and in some others we will sort it out lower.

Zasobi Zahistu

In some cases, traffic jams and others zahisnі outbuildings do not act in case of malfunction. The result of such a steel is the destruction of the insulation. As a result, the metal elements of the hull become powerful conductors, carrying majestic safety.

Luckily, it's zeroed and grounded. This and other methods allow you to protect the body of a person from electric shock. Prote technical implementation of these methods for the protection of electrical appliances is seriously challenged.

Deyakі part of the electrical fittings are suitable for the specifics of the installation perebuvayut under voltage. In such a time, vicory vicarists have special casings. You can also come in to defend, so like a bar'єri and a part of the fence. Prote without grounding and zeroing can not get away. The stench is the extreme between zahistu, and to understand what it is necessary to zastosovuvat, it is necessary to know what the stench excites.

grounding

In order to understand what grounding and grounding are like, it’s better than the first. Given a system of defense against electric shock, we install a lansyug between an attachment and that earth. The result of a similar scheme of greater lower deflection is the voltage from the metal elements of the earth's earth with a vertical penetration of the insulation. You can absolutely calmly handle the equipment, not being afraid of your own harm.

Important! Golovne, which is grounded, similar to the sound of zeroing - the whole robot is in the lines, the neutral is deisolated.

After that, how do you build grounding. Strum time on the conductor into the ground, without creating any kind of trouble for the people. Tsim, vlasne, and vіdrіznyaєtsya tsey method zakhistu vіd zanulennya.

The grounding part is to be blamed for the mother's minimum showing support. This is necessary in order for the strum to enter the ground without any kind of jump. There is one more important factor, which is grounding.

Grounding is also resurrected in the event of grounding, which significantly increases the emergency strum, which is given at the time of the flicker. The indicator of the support may be so small that in case of an emergency situation, the voltage will be too little activation of the control circuit. That attachment may be lost under the strain.

The earthed one has two main elements - the earth conductor and the conductor. The stench itself at once establishes a new attachment. The whole unit is put on buttovі from the ground, the roblochs are safe for vikoristannya. The principle of robotic zeroing is a matter of concern. Therefore, the scheme from the zeros is vikoristovuetsya at new merezhakh.

In the process of developing the protection of lightning from spontaneous shocks by electricity, grounding was divided into two types: for the introduction of a pulsed stream and lightning from thunderstorms. The unique design allows you to reach two goals in a fallow by changing any of the elements of the design.

For the first time, the conductors support the normal work butt fittings navit in emergency situations. In another, they favor the possible application of harm to living organisms. A similar situation is blamed for quiet depressions, if the insulation of the phase door is broken. That's why I'm going to go to the metal building, the consequences are more low serious.

Few people know, but grounding can also be natural, simpler seeming, natural. Metal constructions and pipelines in case of victorious singing minds can be fully grounded.

Important! Like natural grounding, vicorist pipes are hindered, by which gas or other combustible speech is transported.

Classification

As it was appointed more, in the process of constant development of technologies, in the past there were seen many unique grounding schemes. As a result, the following subgroups are established:

• TN-C,
• TN-C-S,

The stench vikoristovuyutsya different schemes z'ednannya, moreover, a number of conductors significantly vіdrіznyaєtsya. The abbreviation itself can tell a lot about attachments. The first letter to talk about the life of life.

• T - neutral, which leads to the ground.
• I - mostly insulated conductors.

Another letter indicates the method of grounding the jet-conducting elements.

• N - Direct call with a dot.
• T - zvyazok іz earth.

In two more diagrams, you can add more letters to stand through the little picture. Letter C indicates the presence of only one conductor. S - about diametrically protilezhne.

Zeroing

Now let's look at what is so grounded and what it looks like from the extraordinary grounding. If we talk about the daily construction of a warehouse, then a system is given for protection against the impact of an electric stream and a combination of metal parts.

Leather from structural elements may have zero voltage. Possible variant with alternative neutrals. Aleone is guilty of mother triphasne dzherelo. Another option includes grounding the generator's windings. Moreover, the rest is responsible to the mother for one phase.

Zanulennya pratsyuє in such a way. The insulation breaks down a lot, there is a short flicker. As a result, an automatic vimikach was launched. Zvichayno, there is a lot to lie in the sight of the system itself. For example, the deacons simply burn out their zapobіzhniki. Have some sort of effect - tse safety of people, like hanging around outbuildings.

Sound the zeroing of the possession, in which the neutral is tightly grounded. In principle, the system is aired as grounded. The peculiarity of the zeroing scheme is that, with the connection of the ELV, the operation of the entire system is required. A similar incident is settled through the difference of forces of the strum.

Another zeroing type of grounding is considered, that when installing the ELV and automatic vimikacha in a non-standard situation, two elements can be used. It is also possible to get a third extension, which can have a greater high swidcode.

Zeroing features

Zanulennya vіdrіznyaєtsya tim zanulennya, scho z short zamikanny strum is to blame obov'yazkovo reach pokagti, at which zabіzhnik melt. Well, there is another alternative to yak vimikacha.

Important! Yakshcho vimikach does not work, or the guards do not melt, pid electrical voltage all buildings will be built, connected to the zahisnoy scheme.

So that this does not happen, you need to follow the zero wire. Vіd yogo I will lay down the security of the entire system. To prevent the strum on all objects of zeroing, it is necessary to get out of the way of the zero dart, be it vimikachs or zabіzhniki. Until the speech, similarly, nothing is disturbed by anything for grounding.

Key powers

We looked at the main characteristics of grounding and grounding, now let's guess what stinks look like one type of one:

1. Grounding is considered to be more efficient.
2. Grounding is carried out by him, which ensures the safety of the chest, lowering the tension of the struma.
3. Zanulennya vіdrіznyаієє tim, scho zahist elektropriladіv zdіysnyuієє zvdyakovy vіdklyuchennya poshkodzhenoї іlyanki.
4. Zanulennya v_dr_znyaєtsya folding in the installation. Restore the grounding power to the skin.

Like a bachite, vіdmіnnostі mіzh zanulennyam i zazlulennyam dosit vаgomі.

Podbags

Zanulennya and grounding - tse two fundamentally different systems to defend against the impact of an electric jet. Okremo should designate that I persevere the vicory system at the booths with new wiring, and to a friend at the old spores.

Well, if you talk about advances, then grounding is brought in more in a superior way. But the installation of such a circuit itself is far from possible in all electrical systems.

Zmist:

From that hour, when the electricity was turned on, people began to experience many things on their own unsafe infusion. Nezabar it became clear that a practical victorious strumu is impossible without zahisnih systems. That’s why it’s been broken up for different people, come in, zokrema. The stench is widely vikoristovuyutsya in the industry and schemes of electrical supply of living quarters. The forms of their zastosuvannya and the main functions are rich in what they use, the prote їх zastosuvannia is strictly demarcated. At zv'yazku z tsim, it is necessary to kindly show, by which the grounding is grounded and grounded.

Zahisne grounding

Most of the safety of electrical appliances and installations is ensured by a way to add zahisnogo grounding. Schematic diagram these outbuildings are located in the primus primus electric installations from the ground, which may mean electrical capacity. In an emergency situation, the phase voltage may be introduced from the control case.

It is possible to lay a grounding in the size of a support, as it can be at the design of a double lance. Vimogi to grounding for the skin object are exactly indicated in the PUE.

Most of the residential houses have centralized grounding, which allows you to connect electrical appliances without any trouble. A greater folding and laborious process of defense can be carried out in the castle houses.

On these objects, grounding devices are made from metal profiles or strips. For the help of a grounding conductor, the stench is hung up with usma accessories, which are in a private booth. In order to reduce the opir at the grounding lances, it is practiced to use contour metal systems, which are located on the great deep. The value of the buried structure and the contour to lie in the type of materials and technical characteristics electrical installation.

Zahisniy zanulennya

Grounding system is one of the types of grounding. At the same time, all the details of electrical installations, buildings, conduct strum, connect to zero explorer. The grounding itself is grounded without a middle from the neutral of the transformer, laid out at the substation.

When it comes emergency situation And the phase voltage gets on the body, which will lead to a huge short flicker. As a result, the construction of the outbuildings, roztashovani in . Therefore, zeroing can be boldly brought to the most efficient systems.

Vidminnosti grounding vіd zanulennya

In grounding systems where there is a superfluous struma, the voltages are applied directly to the ground. For this purpose, there is a special input system, in which case a ground loop of a triangular configuration is installed. Yoga metal structures, z'ednani zvaryuvannyam. Grounding can reduce the unsafe voltage level during the shutdown time with the electrical installation. On the effectiveness of which mind the zahist is embedding the vikonnannya that design features ground loop.

In rich electrical installations, there are a large number of parts and elements, which, according to the nature of the work, which are victorious, are not guilty of stress. The neutral zero wire is connected to them. At the time of the striation with the particles of the phase dart, there is a sharp increase in the struma. There will be a noticeably short flicker, if the electrical installation of the mittevo is connected to the fence. At whom the field is energized, by which it is grounded and grounded. Zero drіt maє significantly smaller opіr, lower ground loop. Z tієї causes and now flickering, as if it were near the ground.

Zeroing is called the electrical connection of the neutral dead-earthed point of the transformer or the generator in the single-phase lines, with the critical jet-conducting surfaces of the electrical installations and the possession, which does not change the voltage in a normal state.

Zanulennya vykonuyut for the safety of the electrical safety of the electrical installation on the industrial vibration.

At the same time, according to the new PUE standards, assigned in 1.7.132, this method of electrical engineering has been blocked.

Home electrical metering - single-phase, shards of life butovy electric appliances zdіysnyuєtsya zі zvichaynyh sockets, de є phase і working zero, which is unacceptable to move іz zahisnymi wire, rolyachi zanulennya case.

Zastosuvannya on virobnitstvі

Zeroing zastosovuetsya for a guaranteed quick hour (no more than 0.4 s) spratsovuvannya zahisnyh vimikachiv that zapobіzhnikіv on vyrobnitstvі, yakshcho on the corps z'appear unsafe for life stress.

Vіdminnіst grounding and nulling

With whom so bezpechuetsya fire safety- at the time of the zastosuvannya of one only earthing, through the yogo is larger, lower at the zero one, the support, the strum of the coil may be insufficient, great strums vanity.

Schematic grounding circuit. 1) Electrical installation; 2) Explorer; 3) Grounding.

Ale, the meaning of the strum is a turn, and the interval of an hour, which will be necessary for the protection of the defense, may be sufficient, so that the insulation of the wires in the middle of the installation will be saved and called out to the fire.

In such a rank, for the help of zeroing, a short-hour stream of a short flicker is guaranteed to reach, which does not reach the electrical wiring, but zmushuvati zahisnі outbuildings. It is necessary to understand that in a given situation, grounding and grounding are grounded at once, shards of grounding are grounded by the main enterprise, which can be without any grounding outbuildings.

Scheme of a zakish zero. 1) Electrical installation; 2) strumovian zakhist; Ro - grounding zero wire

In addition, the supply of electricity to the vibrations is carried out with a number of introductions, which guarantee the balance of the phases and the insurance system in the form of a zero shave.

Self-zero is deadly unsafe!

Often, during the modernization of the old electrical wiring in the apartment, due to the transition to a new, three-wire system, due to the old PE wire, it seems that the grounding is grounded, and it is a pleasure to ground the PE bus, so that the old TN-C system is operated in the apartment building .

Tsya joy is mortally unsafe through low reasons:

Progress in electrical engineering

Previously, zeroing was actively stagnant at the supply of electrical safety equipment for electric stoves. Ale in such booths was attached promoted respect zero drotu, at the skin superficial shield bulo re-grounding to that zero was not unsafe through. At that time, electricity was supplied behind the TN-C system; good guide.

Grounding system TN-C

The regulation of the entire electrical installation of the possession of electrical installations by the standards of the PUE of the sixth type, it was defiantly prevented the operation of electrical control without grounding.

Ale progressed in electrical engineering to the extent that the old system was scrambled through a lot of shortcomings, some of them were described above.

Grounding system TN-S

At the moment, there are new PUE standards of the first kind, depribably, for the supply of electricity to the housing stock of that organization was established for the new systems TN-S, TN-C-S.

Earthing system TN-C-S

Zastosuvannya zeroing in energy supply

JIMITY NEW REGULATIONS PUE, IN SYSTEM OF ELEKTROSTRAIN TN-C-S, NUMBERNYE ZIONNYUєUN REDUCED ROOM ESTNING ELEKTROPRODIVIV, ALLE NOT VPSCUE Із Із Із in the global proceed in a global scale, osskіlki rendered to the Syney of the Zhisny Dright of PE Vіdbuyuyuyu on the introductory-risk attachment (lying) Bagvartín Budіvlі.

In this case, the confusion of the wire PEN with the main grounding bus (GZSH) can be combined, as it can be re-grounded.

If you want to zero and fasten without a middle to the GZSH, as soon as one hour with a PE bus, which can contact from the metal cases of the butted electrical appliances for the help of a protective conductor, so the zeroing is winded up from a simple connection of the PEN zero door to the ground electrical terminal.

Vіdminnіst polyagaє in the fact that in this case on the ASU there is a re-grounding of the zero drota, as theoretically it is possible to consider the grounding of the grounding outbuilding and the PE busbar connected to it. Ale, it’s not customary to say that this process is called the base of the PEN dart on PE (protective conductor) and N (working zero) at the re-grounding point.

Nulling alternative

In the TN-S system, the zeroing of the PE wire is only found at one point - at the transformer substation or the generator, there it is connected to the PEN wire, and after the new wire, the working zero does not change anywhere.

In the schemes described above, the energy supply of grounding and zeroing mutually complement one another, without any electrical safety, but in systems insulated neutral(IT), like in the TT system, zeroing does not get stuck in the air.

Electrical installation, which requires electrical supply according to the IT or TT regulation, may be grounded for auxiliary power circuits. The oscillators in the IT mode are affected by the power supply of a specific state, then the TT system can be looked at as the only alternative to the unauthorized and incorrect zeroing of the PE bus, even the transition to the new power supply systems (TN-S, TN-CS) is a great problem for the old two fates.

Electricity, vikonan according to the TT scheme, can safely secure the electrical protection against damage, and be richly safe, lower unauthorized grounding, as it will comply with the PUE 1.7.39 standard.

When modernizing home electrical wiring, the best way to ensure safety is to lower the PE bus, or to deprive it of a spark that is not connected, checking for the renewal of the electrical supply of the entire apartment block.

Zanulennya at a private booth

It is not conceivable to carry out a PEN at a private booth, as it is pointed out below the PUE standards:

In this case, for the total zero wire, a second earthing plus grounding is used for the PE protection conductor bus.

Vihodyachi from what has been said, it is possible to rob the visnovok, which the vikonan has a proper rank of nullification and an important lanka for safety electrical safety, and at the same time from grounding, it is possible to get electric supply for a more cheap TN-C-S system.

TT system

The difference in price, equal to TN-S, depends on the fact that the PEN entered into the booth, and there is no need to pull the PE wire to the transformer substation. But also a trace of memory, that ignoring the normatives of that PUE fence can lead to lethal consequences, as it self-defeats the zeroing of the PE conductor or the metal buildings of the possession. IN

all independent electrical installation robots the company is responsible for the energy supply, and they are responsible for conducting control checks and rechecking the correctness of the work.