Vidminnosti between grounded and neutralized, schemes and rozrahunki

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What makes grounding and zeroing sound? Fahіvtsі rose from cim nutrition. All zahisnі come in from the peak streams. Let the robot be prevented from being injured by electricians and people using butt fittings. Name the difference, but all the system will zahist.

In order to understand why there is a difference between grounded and grounded, it is necessary to know the recognition of the principle of operation of electrical appliances.

Principle dії

The grounding circuit of the electric lance is a system of wires, which connects the skin, to the lance, which is serviced, with a special grounding loop. In the event of a breakdown on the body, I will attach either a coil of a strum from a wired wire, the strum to pass through the wires to the grounding device.

Opir grounding, ring out, wince less, lower opir of the entire lansyug. Therefore, the strum is flowing in a “light” way and is led from the buildings of the possession.

The zero is called the electric conduit of the strum-conducting housings and accessories from a dead-earthed neutral. When the peak values of the stream are found, its potential is introduced behind the auxiliary grounding bus into a special shield or into a transformer box. A smutty mark of recognition - in the case of breakdowns and coils of the voltage on the body of the possession, a short chime is called out, the guards are on fire, or they automatically rozmikachi lansyuga.

Tse i є head vіdminnіstyu grounding vіd zanulennya. The grounding circuit accepts short-circuit currents, grounding calls for the use of external devices.

Let's take a look at the report on the robot of the systems for protection from the electric stream.

Features of the grounding outbuilding

The main method of the grounding circuit is to reduce the potential in case of a breakdown on the body and short flicker, to a safe value. With this, the pressure on the body is reduced and the force of the struma is reduced to a safe level. At the forefront, the buildings of the electrical installation are grounded, which will be used in the influx of atmospheric blasts.

When mounting the circuit in a three-phase stream, not more than 1000 V, insulate the neutral. At higher voltage levels, the system is installed with different neutral modes.

- The whole system, which includes:

grounding;
grounding horizontal conductors;
bring darts.

The grounding device is subdivided into pieces and natural.

If possible, follow the natural grounding:

underground pipelines of water supply Ale, in which direction, it is necessary to have a pipeline with a protection from blukayuchih streams;
are connected to the metal structures of workshops and premises;
steel or copper braided cable;
pipelines near Sverdlovin.

According to the norms of PUE, it was fenced to connect the ground loop to the scorched pipes and with fire-resistant materials.

With piece equipment, the possession, which is grounded, is guarded by a path prepared for the contour at the sight of an equal-sided tricot with metal pins or kutochkiv. For puddle and acidic soil, it is recommended to vicorate copper, galvanized grounding. To prepare the contour of the tricot, it is necessary to sink into the ground by 70 cm.

It is not possible to install a group grounding device at the drill hole. It is necessary to score on the area of the mark, on the clay, not less than 2 meters. Let's put the earthworks into a single structure for help with steel smog.

Cases of the dermal attachment are connected to the obov'yazkovo to the system of protection. In this case, it is not possible to connect a sprig of spazhivachiv sequentially, the skin can be attached to the line of connection.

Now about the smut - the value of equal support to the contour. The new one has trouble supporting the skin attachment of the lancet and yoga darts. When re-roofing the support to the contour, it is necessary to fix the level of the value of the soil, to determine the depth of the grounding. It is necessary to check the temperature specificity of the region for the lining of the contour.

Remember - for speky weather, the place of installation should be filled with water, the soil, when hanging, changes the support.

When servicing, the measure is up to 1000. In that tension, the possession is over 100 kVA - the circuit is supported by no more than 10 ohms. For butt strings, the optimal values will be 4 ohms. The voltage at the dot is to blame for less than 40 V. Merezhі over 1000 V is protected by an attachment with a support no more than 1 Ohm.

The main features are the principle of grounding. Report, you can read the articles and topics on the site.

Features and principle of zeroing

Appointment of zeroing - the method of a zeroing attachment allows you to connect the housings to the possession of and other parts from metals from a neutral (zero neutral conductor). In the minds of the earthed conductor and the voltage in the measure is not more than 1000 V, the grounding circuit is victorious.

In the event of a breakdown of the phase stream, a short circuit of the phase occurs on the body of the electrical appliance. When you spratsovuyut automatic shutdown of the struma and the lansyg are roaring. Tsim i viriznyayutsya two zahisnі systems.

Before adjusting the zeroing, bring:

fusible protector;
automatic jet switch-on;
vbudovani at starters, thermal relays;
contactor with thermal protection.

Vinikla situation of breakdown of the phase voltage. When looking at the body of the electrical installation, the jet should pass along the neutral to the transformer winding. Let's see something new in phase - to the zapobіzhnik. The fuses of the guards light up at the peak values of the stream, the electric lance is connected to the supply of the voltage.

When it’s zero, it’s easy to carry out a strum, allowing you to spratsyuvati zahista. Yogo is laid at a safe place, it is fenced to equip it with additional materials and other outbuildings. The value of the equal conductivity of the phase conductor can be half as large as the zero conductor. As a rule, steel plates, cable sheaths and other materials are used in every case.

The conductors are reassessed for accuracy in the process of commissioning the work and the connection of electricity in the weekdays, as well as after a five-hour hour when the electrical circuit is cored. Not less than once in a period of 5 years term, it is necessary to carry out the support of the entire lance of the phase and zero conductors on the housings of the farthest possession of the electrical wiring board, as well as the lowest possession in the premises.

Zahisne zanulennya, in deyaky vipadkah, we can win the robot zahisnoy inclusion. With this, tsі 2-і zahisnі system tim, scho in times of zahisnogo vіklyuchennya lancer, yogo can win in any minds, for different modes of the grounding conductor, showing the voltage of the lancer. Such meshes can be dispensed with without a zero connection.

It is necessary to carry out the resurrection of nullification for the improvement of all the minds of the robot and the principle of yoga diy.

Zahisne vyklyuchennya vykonuyut for help zahisnoy system, yak turn on elektroobladnannya automatically. In the event of an emergency situation, such a threat of injury and infliction of electrical injuries to people, such situations can be attributed to:

short-term noise of the phase wire on the case;
poor insulation of electrical wiring;
faults on the grounding circuit;
damage to the integrity of the conductors, which will be nullified.

Tsya zahisna system is often victorious for the impossibility to carry out the zahisna of the grounding system and grounding. Ale, on the vіdpovidalnyh plots, it is possible to install a shutdown switch and, as an additional circuit, protect the people from that possession in the case of the wounded by the streams of the coil and the short flicker.

At the same time, it is necessary to add, fallow, according to the size of the stream at the entrance and change the reaction of the outhouses, for a sprat of schemes:

the presence of tension on the body of the possession;
the strength of the struma under the hour of the zamikannya on the wire of the earth;
strain the force of the struma in the zero conductor;
equal voltage on the phase according to the value on the ground;
an extension for a standing chimney strumu;
add-on combinations.

All systems for zahistu and inclusion of the supply of strum in the measure are equipped with automatic vimics. Their constructions have been equipped with a special power supply. At this period of time, for the inclusion of a measure, it is not guilty to revisit 2-10 seconds.

At the end, we will analyze the food, as you can ask an electrician-pochatkіvets.

Interchangeability of systems

Can you install a grounding replacement for grounding? On the basis of the supply, be it a fahіvets vodpovіst “so”, but it’s more like a promissory booth.

In a habitable dwelling place, such a scheme should be followed in some rare cases and only in non-living dwelling places. Tse zumovleno, nasampered, s nerіvnomіrnim navantazhennyam to conduct phase and neutral. Pratsyyuyuchi, on the dart of the skin phase should be the same aim, and from the neutral lancet lancet, pass to finish the small strum. To the skin, it is impossible to move the phase, but it is also possible to beat the robot with zero under pressure.

At tsomu, the gap between zero and the phase is less than the phase. With long-term vigor, the veins oxidize on twisting, the insulation ball breaks down when heated, and it simply burns out when the veins are hot. When the voltage of the phase goes up to the shield, then, through the zero wire, go to the spigot. The hulls of the fittings are under tension, the possibility of being struck by a people's stream is moving.

How to cheer up smart people on the Internet, you can get to the skin-on-button attachment of the zeroing system, or cause significant damage to the wiring and further repairs. Therefore, it is not possible to nullify the dzherel of living quarters.

It is better to install in the electrical panel the attachments of the zakhisnogo switch-on and calmly coristuvat with butt fittings. The skin zahisny pristriy wins its recognition, with the right rozrahunka, installation of that yogic vikoristanny.