More symmetrical than z'ednane with a star. What is the air of the day star in the trikutnik

In three-phase lances, two types of winding windings of transformers, electrical receivers and generators sound. One of the spoluks is called a zirka, and another one is a trikutnik. Let's take a look at the report, what is the reason and what the stench wrecks each other.

Appointment

Z'ednannya at the zirku can be on the verge under itself in such a way, in a way that all the working phase windings are united in one vuzol, the titles are zero or a neutral point and are denoted by the letter O.

Z'ednannya at trikutnikє scheme, with any phase of the generator windings, they start in such a way that the ear of one of them starts with the end of the other.

Porivnyannia

Vіdminnіst v zaznachenih schemes polagaє z'dnanny kintsіv windings of the electric motor generator. AT scheme "zirka", all ends of the windings are connected at once, just like scheme "trikutnik" the end of one phase winding is mounted behind the cob of the step.

Crimea principle diagram foldable, electric motors with phase windings, equipped with a star, function significantly softer, lower motors, so that the phase windings can be closed. Ale, with a stark electric motor, it is not possible to develop your own passport tightness. Then, when the phase windings are connected to the tricoutnik, the engine will always work on the basis of the declared tightness, as it may be the second time more striking, lower when it is connected to the star. The great short-lived trikutnik є more great values launch jets

Visnovki site

1. In the circuit of the z'ednannya, the zirka of the windings is mounted in one vuzol.
2. In the circuit of the plant, the tricot end of one winding is mounted with the cob of the offensive winding.
3. An electric motor with windings, with a star running more smoothly, a lower motor with a trikutnik.
4. When you check the air, the tightness of the engine is lowered for the passport.
5. When the tricot is closed, the tension of the dvigun may be the second time higher, lower when it is brought into the mirror.

I will build the largest power supply at the pochatkіvtsіv vyvchennya transformers and other electrical appliances “What is the star and trikutnik?”. Why they stink and how powerful, we can try to explain in our article.

Let's take a look at the circuits for connecting the windings with the butt of a three-phase transformer. I have my own magnetic field, which consists of three shears. There are two windings on the skin shearing - primary and secondary. A high voltage is applied to the primary, and a low voltage is applied to the secondary and go to a slowdown. AT mental knowledge the scheme of the day is indicated by a fraction (for example, Y⁄∆ or Y/D or Y/D), the value of the dialer is the number of the windings higher voltage(VN), and the value of the banner - lower stress (PN).

Leather shearing can be the first winding and the second (three first and three secondary windings). Leather winding can be on the cob and end. The windings can be connected between themselves in the way of zirka chi trikutnik. For the sake of clarity, the overexposure is significant schematically (Fig. 1)

When the star windings are connected, the windings are connected at once, and three phases go from the cob to the spigot. Z vivedennya z'ednan kіntsіv windings neutral wire N (wine is null). At the result, there is a good choice - a wired, three-phase system, as often there are lines of repeated power transmission lines. (Fig. 2)

The advantage of such a scheme is that we can take 2 types of voltage: phase (phase + neutral) and linear. In this case, the line voltage is √3 times greater for the phase. Knowing what phase voltage gives us 220V, then multiplying it by √3 = 1.73, we take approximately 380V - the line voltage. If there is an electric strum, then the direction of the phase strum is better than the linear one, because scho linear, scho phase jet, however, emerge from the winding, the other way in the new one is not. So the varto itself means that only in the air is a neutral wire, which is a “virvnyuvnyuvachem” tension, so that the voltage does not change and does not jump.

Now let's look at the windings of the windings with a tricot. If the end of phase A is connected with the cob of the phase, the end of the phase is connected with the ear of the phase, and the end of the phase is connected with the ear of phase A, then the winding circuit is taken away by the tricotnik. Tobto. in this scheme, the windings are connected sequentially. (Fig. 3)

Basically, such a scheme is zastosovuetsya for symmetrical aiming, De behind the phases of vanishing does not change. In such a phase, the voltage is more equal to the linear one, and from electric strum, Now, in such a scheme, different. Strum line more phase struma at √3 times. The winding winding with a tricotnik ensures the balance of the ampere-turn for zero struma.

succession. In simple words, The scheme for connecting the tricutnik ensures that the voltage is balanced.

Let's bring the bags. For the basic design of circuits for winding power transformer windings, it is necessary to understand what the difference between these windings is in the fact that in the world all three windings are connected at once with one end of the skin windings in one (neutral, winding) point z'ednani sequentially. Z'ednannya zirka allows us to create two types of voltage: linear (380V) and phase (220V), and in trikutnik more than 380V.

Choose a scheme for windings to be deposited for low reasons:

• Transformer Life Schemes
• Transformer pressure
• equal voltage
• Asymmetry of interest
• Economic mirkuvan

So, for example, for a wire with a voltage of 35 kV, and it is better to connect the transformer winding with a star circuit, grounding the zero point. In this case, we will see that the voltage of the transformer and the transmission lines of the transmission lines will be 3 times less than the line voltage, which will lead to a decrease in the insulation voltage.

In fact, the following groups are most commonly used: Y/Y, D/Y, Y/D.

The group of windings Y/Y (zirka/zirka) is most often used in transformers of low intensity, in order to live symmetrical three-phase electrical appliances / electrical receivers. It is also sometimes stuck in circuits of great intensity, if it is necessary to ground the neutral point.

The group of windings D/Y (trikutnik/zirka) zastosovuetsya, more importantly in step-down transformers of great tension. Most often, transformers with such devices are used at the warehouse of livestock systems low voltage. As a rule, the neutral point of the star is grounded, for both line and phase voltages.

The group of windings Y/D (zirka/trikutnik) vikoristovuetsya, mainly at the head transformers of the great power stations and substations, which are not used for subdivision.

Z'DNANNIA ZIRKOI AND TRIKUTNIKOM

ways to connect electric elements. lanceugs, with which they took the lances of the lansyug, they are able to satisfy the tripromenevu zirka and trikutnik. The largest width of S. h. і t. took off in three-phase electric. Lanziugs. When z'ednanny zirkoy kіntsі windings three phases of the generator (transformer, electric motor) are connected to a central neutral point, and the cob of windings is connected to three external darts ("linear darts"). When the tricutnik is closed, the dermal phase closes with the spadix of the offensive and the linear darts join up to the end of three knots. As a generator and receiver of electricity, it is neutral. the points can be connected to the fourth (neutral) wire. In symmetrical priymachiv, z'єdnanih with a starry chi tricutnik, the supports of all three phases are the same. Have symmetrical triphasic lanceug, with a tricot, the voltage U l between the line wires is equal to the voltage U f on the phases of the receiver, and the strength of the struma in the line wires is a factor of 3 times greater, lower at the phases of the receiver. When z'ednanny with a star line voltage there are more phases in the roots 3 times, and the strength of the struma in the line wires is the same in the phases. rice.

Great encyclopedic polytechnic dictionary. 2004 .

Wonder what is "Z'DNANNYA ZIRKOI I TRIKUTNIKOM" in other dictionaries:

Z'DNANNIA ZIRKOI AND TRIKUTNIKOM- ways to connect to a three-phase electric lance (Fig. 15). When connecting the star windings of the three phases of the generator (transformer, electric motor), connect the central neutral point, and add the windings to the cob up to three. Metallurgical vocabulary

In electrical engineering, ways of connecting elements electric lancers(Div. Electric lansyug), with some needles of a lancet, they make a double tricot and tripromenevu zirka (div. fig.). The largest width of T. and z. with. taken from……

Three-phase system, Supplement of three single-phase electric lances of a zminy struma (Div. Zminny strum) (titles by phases), which have three changing voltages the same frequency, breaking in phase one at a time; Great Radianska Encyclopedia

Try to zastosuvat electrician like Rukh's power was crushed on the cob of the past history. So, after that, yak (1821 r.) Faraday discovered the presence of a magnet wrapper around the conductors with strums and navpak, Sturgeons and Barlow prompted.

- (English selsyn, English self and Greek synchronos one-hour, synchronous) Electric car, which allows you to move the apex of the shaft, as I will attach it, or the mechanism is suitable for the apex of the displacement of the other shaft. Great Radianska Encyclopedia

E. sewerage is next to the station and spores for supplying E. energy from this dzherel to priymachiv, roztashovanih at different points of this city. head part e. sewerage є darts, for yakim ... Encyclopedic dictionary F.A. Brockhaus and I.A. Efron- A three-phase system of electrical supply of okremias of high-phase systems of electric lances, in which they are created by a sinusoidal EPC of the same frequency with a sinusoidal dzherel, they put one at a time one per hour per song ... ... Wikipedia