The Great Encyclopedia of Oil and Gas. Selection of control and switching equipment. Razrahunok nominal strumu

At once presence automatic vimics in the electric line, whether it be some kind of booth already є ring out with practice.

If earlier such a vimikach and buv at the merezhі, then it’s less at the entrance to the wiring to the booth.

At the same time, they install a house on different poles, which vibrates the supply of electrical energy to the bells and whistles.

Functions of automatic vimicach

Call the knowledge of the spymaster's booth about how these vimikaci should be brought up to the fact that they are included in the measure, or one of the gіlok її vіd navantazhennya.

And it’s true, but I’ll build a little bit more of a robot.

The main recognition is that the wiring is overridden by the value of the struma force, and the forward one is critical.

Just briefly, when the force of the wire is moved, the vimikach will streak that part of the wiring, as it is attached to the third outer terminal. The axis of only spratsovuvannya can be changed.

With a slight increase in the strength of the struma of the veins, the struma of the veins will be streaked through the singing period.

And the axis with a sharp haircut, which is blamed for a short flicker, the vimikach is practically mittevo, which saves the wiring from melting and possibly burning the spalah.

Even though you can see the automatic switch, you can’t see any special folding design - just a plastic box with terminals for connecting wiring and a small toggle switch for switching on and off.

Ale, it’s less called.

The design of the automatic vimikacha

The internal construction of yoga is not so simple.

At the hull roztashovanі:

• cocking mechanism;
• Gvint thermal installation;
• Bi-metal thermal expansion valve;
• Electromagnetic kotushkovy rozchіpluvach;
• Arc chamber;
• Power contacts;
• Channel for the introduction of rozpechenih gases.

Mechanism for a platoon of contacts with a toggle switch, and in the beginning of the year, power contacts were established. Їm i be carried out transfer electric struma from the entrance terminals to the exits.

Bimetal (thermal) rozchipluvach є plate, as when heated, it bends, roz'ednuyuchi power contacts.

Appointments of this rozchipluvach for pinning the supply of strum, as if the strength of this force cannot reach its peak value.

With a slight perturbation of the force of the strum, the plate will warm up and the contacts will become disconnected. Tobto spratsovuє tsey razchipluvach through the singing hour.

The screw regulates the gap between the plate and the contact. The regulation of the screw is made by the virobnik plant.

Electromagnetic rozchipluvach appointments for mittevy nestrumlennya merezhi. Spratsovuє vіn less for the influx of a new stream of high values, which is blamed for a short hum.

When spratsovuvanni one s rozchіpluvachіv mіzh contacts will inevitably become a faulty electric arc, and the greater the power of the struma - the more powerful.

So that this arc did not cause the elements of vimikach to fail, an arc-extinguishing chamber should be included in its construction, in order to extinguish the arc in itself.

At the same time, in the middle, gases are settled with a raised temperature, which are introduced through a special channel.

Structurally, all automatic devices are practically the same, but their parameters are changed.

Establish certain criteria for the selection of automatic vimics, how to check their parameters.

Main characteristics of automatic vimics

Strum short hum.

The first of the criteria, which is to be protected when choosing an automatic machine, is the strum of a short flicker, and the fault is the building of the vimikach, which is included.

This criterion characterizes the maximum value of the force of the struma, for which the automatic machine works without taking off the ear.

This indicator is measured in Amperes, but with a short flicker, the power of the stream can reach significant indicators, this criterion for the machine is indicated in thousands of Amperes.

Struma power value.

Another criterion for choosing is the nominal value of the strength of the struma, with a pracciuvate vimikach.

This criterion points to the strength of the struma, when it is moved, such an automatic machine will work and there will be an explosion.

A lot of factors are poured into this show - retin drotu, material prepared, dozhina wiring to the machine, navantazhennya, as it will be done at the wire when connecting electrical appliances.

Another criterion is the spratsovuvannya strum.

Tsei pokaznik indicates that the maximum value of the struma force can be vitrimati vimikach without specialization electromagnetic blower.

On the right, when the accessories are turned on, they can blame the starting jets, which often outweigh the nominal value by a factor of several times, but the stink is not a short jet. For example, raising a computer.

These start-up streams are short-stringed, so do not lead to the application of a thermal rosemary, the shards for which an hour is needed, and their power is not enough to turn on the electromagnetic rosemary.

The criterion for subdivisions into classes, as they indicate, how much power of the starting strum can exceed the nominal one without specializing the machine.

Selectivity is less important criterion.

Depending on the first three criteria, it is smartly possible to divide all the automations for the selection into:

1. Low-vantage merezh;
2. Middle of the vanity;
3. High-convantage merezh.

With this vikoristovuvat, for example, a high-coupling machine for gіlka merezhі, as for the safety of the life of light bulbs, it’s not only not enough, but it’s not safe.

These characteristics are significant, lower is necessary for such a measure, so in case of faulty short circuit faults, you may simply not be able to do it.

First of all, an automatic machine for low-vanity lines with victories on lines with great interests spratsovuvatim to navit with small interests.

The number of poles of the machine is shown, which of the types can be used.

For the ultimate home single-phase mesh come bipolar vimikach.

On the safety of the surroundings of the delyanki tsієї merezhі pіdіyde single-pole automatic machine.

And the axis of the yakscho is three-phase merging into a booth, then you need a chotiripole vimikach.

But there are no more criteria that indicate on the main characteristics. Note that the stench is applied as a marking on the body of the automatic vimikach.

Now, on the butt, it is explainable why the leather is used from the elements of this marking.

Appointment of marking vimikaci

On all machines there is a large alphanumeric marking (B10, C16, C10, D50).

This marking includes two parameters of the vimikacha: the class of the strum of the spratsovuvannya and the rated strum of the voltage.

We have three classes - B, C and D. Leather from them can have its own multiplicity of strum strength in relation to nominal value.

So, the automatic machine class "B" building will take the power of the strum 3-5 times higher than the face value, before it, how to create a new contact. Such automatic machines are suitable for weakly sized merezh.

In class “C”, the power of the strum to the point of the machine can reach 5-10 times the nominal value. The machine is from the same class as the appointments for the average value of the measures.

Class D of appointments for high-convantage merezh, which can short-term value of the increase in the strength of the struma. Such an automatic machine can be vitrimatized to the point of strumming by force, which exceeds the nominal value by 10-20 times.

Another meaning of this marking is indicated by the nominal value of the strum, with some pracyuvatime vimikach.

The main parameter when choosing for cim values ​​is the crossover.

I can lie across the dart, so that the strength of the struma can pass through it.

So, the middle double-wire wire is made of 1.5 mm peretina. sq., we close the provisions in a way (into a strobe or a pipe) we can pass a strum through itself with a force of 18A without setting a shkodi for the drotu itself.

In case of overheating of this value, it will be heated later, which can lead to melting of the insulation, and without it, there will be a short circuit.

For drot with a 2.5 mm thread. sq. the value already reaches 25 A. As a result, more stretch, Tim more access to the building drotu.

Below in the table you can look through all the meanings of the struma.

Now we link the markings together.

For example, є vimikach іz B10. Tse means that the nominal power of the stream, like the automatic machine is passed through itself without the inclusion of a thermal blower in the robot - 10 A.

Vimikach maє class, to that before spratsovuvannya electromagnetic raschiplyuvach building skip short-string strum with a power of up to 30-50 A.

But in this case, it’s not a big trick, as if it’s a safe bet when choosing a machine gun.

For example, the strength of the strum, which goes through the crisis, exceeds nominally less than 1.5 times. For spratsovuvannya electromagnetic rozchіpluvach tsgo is not enough.

And if this is the case, the throughput of the device will exactly match the nominal strength of the strum of the machine, then an increase in the value of the strum will be ruinous to the conductor itself.

The design has a thermal expansion valve, which is still a good solution, but it takes an hour to make the bimetal plate warm up and open the contacts.

І tsey period can be dosit trivalim, with zbіlshene strumu value all the whole hour negatively impact on the wiring.

Therefore, when choosing an automatic machine, the next step is to select the value with the nominal values ​​lower than the lower throughput of the building.

So, for a 1.5 mm dart. sq., let the building pass through itself a strum with a power of 18A, reducing the automatic vimikach with a nominal value of 10 A.

At such a time, with increased strength, the struma is higher than the nominal one, passing through yoga without possible damage.

And for the dart with a 2.5 mm retina. sq. and with a throughput power of the strum 25A pid_yde automatic vimikach with a rated power of the strum 16 A.

Let's move on to another marking - the capacity of the machine, which is included. On the case, the won is applied at the sight digital signage- 4500, 6000, 10000 etc.

As it has already been said, the maximum power of the strum is, if the machine works without its own mischief.

Let's take a look at the butt, at the merezhі there was a short circuit, as a result of which the strength of the struma increased to 5000A.

Electromagnet rozchipluvach spratsyuvav protevinikla electric arc.

If the machine can be switched on at the level of 4500A, then the arc-extinguishing chamber will not be able to fully extinguish the arc of such tension, and the machine itself will be damaged.

Ale, if you install an automatic machine, for which the indicator of the minimum building is 6000A, turn off the arc of the camera, with this, without your own fault.

Indeed, this ostentation is a characteristic of the safety of the machine itself.

І third marking, which is applied to the body, and it is also important - the class of blasting.

Tse digital marking, roztashovuetsya order for marking vіdklyucha zdatnostі, folded out of the numbers 2 or 3.

Tse marking indicates the code of the machine in case of short circuit. In times of fading, the strength of the strum does not increase mittevo, but grows.

The sooner the machine starts to spratsyuvanya, the less shkodi start the short circuit.

At the same time, automatic machines with class “2” are practically not heard, stinks of the stench are more common, lower vimikachi with class “3”.

Pardons when choosing, as it is necessary to heal

We look at the widest pardons, which are allowed when choosing an automatic vimikacha.

Vibirayuchi automatic, keruyutsya total pouzhnistyu spozhivachіv, scho є є z rude pardons.

The automatic machine only protects the wiring from the port, change the characteristics of the wines not building.

If you put a heavy machine on a weak wiring and connect a strong energy booster to it, you will inevitably bring the wiring to a low level, the machine will not be able to beat its robot.

Therefore, it is necessary to orientate yourself behind the peretina with the help of the throughput, and not for the effort of the slow ones.

Most of the time, all the needles of the merezhi are equipped with the same automatic machines, and then we try to win one of the needles as if it is highly desirable.

Even at the stage, it’s important to think about those, so that if one of the legs is small, the parameters of the tabula are equipped with an automatic machine, invested in significant advancement.

For example, at the garage of a private booth, you can easily adjust the fittings that create a significant ambition.

Tsyu gіlku better zazdalegіd possiliti, nіzh potіm pereroblyat chi spodіvatis, scho machine chi wiring "vitrimayut".

At the arrival of automatic bills, the buyers are forced to minimize the number of withdrawals. On safety, it’s better not to be afraid.

Buy such attachments only from well-recommended firms in specialized stores, and even better from an official distributor.

We hope that you will be able to help you choose the right automatic switch for your booth.

TSE MAY BE TSIKAVIM:

22.12.2015

Nominal strum - tse maximum strum, which is allowed for the minds of the minds of the minds of the heating of the strum-conducting parts of the insulation, if necessary, it is possible to practice the non-obstructive term. Nominal strum - all one the most important parameters whether it be electrical equipment, whether it be sockets, transformers or power lines. At a nominal stream, a constant balance of heat transfer between heating conductors is maintained when electric charges are injected into them and cooling is carried out due to frequent temperature input at the outer core. In order to correctly pick up the necessary information, it is important to correctly determine the nominal strum.

Appointment principle par strumu
If you need to know the value of the nominal struma for the conductor, you can use a special table. It has a value for the strength of the strum, which can blast the explorer. If you need to know the value of the nominal strum for electric motors, if you want to enter any building, then it’s best to use formulas. If it is necessary to designate the value of the nominal strum for the beneficiary, it is necessary to know the tension, as well as the vins of repayments.
For carrying out rozrahunkіv and vimіrіv you need: caliper, voltmeter, I will attach the registration certificate and the table of the deposit of the nominal stream according to the conductor's cut

With the method of standardization obladnannya GOST 6827-76 is introduced into the low value of the nominal streams, with any fault pratsyuvati practically all electrical installations.

How to calculate the nominal strum on the cut
For the cob, you need to designate the material, from which the conductor (provid) is prepared. The largest demand for aluminum honey dartsіz round transverse peretina. Measure your diameter using the help of a caliper, find out the area of ​​the cut. For this, multiply 3.14 by the square of the diameter and divide by 4. The formula looks like this: S = 3.14.D² / 4. You can find out about the type of drone, with which you can see on the right. Vin can be single-core, two-core or three-core. Let's go back to the table and state the value of the nominal strum for that dart. It is important to remember that the redistribution of the significance of the meaning to cause a burnout of the dart.

How to designate the nominal strum of the defender
On the outhouse of the guardian, it is stated that the tension with the ventilation is approximately 20%. Knowing the voltage in the measure, in the way of the wines the inserts are to be blamed (you can measure with a voltmeter), I will need to expand the tension at the BAT by dividing it into shear stress. Zapobіzhnik to serve as a defender of the conductor in the ruins at times of changing the nominal values ​​of the strum.

How to determine the nominal jet of an electric motor
To determine the value of the nominal thrust of the engine fast strumu, it is necessary to know the nominal tension, the voltage of the dzherel, to what kind of connections, that coefficient is the corisnoi diї. Usі value can be found in the technical documents. The voltage was measured with a voltmeter. It was necessary to give the tension on the tension and the coeficient of brown hair in parts according to the need. The formula may look like this: I=P/(U.η). You know the value of the struma in amperes.
It is also important to know that the maximum values ​​of the nominal strum can be short strum.

How to choose the right amount of money for the nominal amount
If in lancius the value of the struma will be lower than the nominal value, then it will be impossible to reach the maximum tightness of the robot and attach it. If the strength of the struma, on the other hand, shows up more than the nominal, then the lancet will collapse. The nominal strum is guilty of passing through the contacts of the lancet without traces - the greatest possible hour interval. Usy zahisnі pristroї struma owe nalashtovuvatisya on the work with yogo relocated.
Zahisnі pristroi vіd navantazhennya can pratsyuvati for thermal principle. Tse zabіzhniki that thermal expansion. stinks react to thermal expansion that, vitrimuyuchi singing hour, turn on її. It is also possible to install zahisnih outbuildings, which will mark the “mitt” of the future. Turn-on hour to 0.02 seconds. vibir zakhisnogo annex Important for strumu systems.

Setting up an automatic vimikacha for a nominal strum
For the zahistu pobutovih electrical tethers and other industrial outbuildings to add wider vimikachi, yakі pratsyyuyut for the principle of strum vіdsіchennya and thermal expansion. Be-yakiy automatic vimikach of preparations for the nominal value of the struma and the voltage. Itself for їх values ​​​​to choose zahisnі outbuildings.
Submit 4 types of frequent parameters for different automatic machines. Їх designations A, B, C, D. Variables are divided for inclusion of the first hour of accidents for the multiplicity of the strum from 1.3 to 14. Such variables are selected for the first type of navigation:
. lighting systems;
. napіvprovіdniki;
. schemes with different inventions;
. lancers who show off great ambitions.
Officials, what to add to the speed of turning on the machine: dovkilla, the degree of filling of the shield and the imovirnosti heating or cooling due to the participation of third-party gerel.

How to choose an automatic switch and electrical wiring
In order to properly pick up the protection of that electrical wiring, it is necessary to insure the extra charge to them. In order to determine the її value, carry out її rozrahunki for the nominal intensity of the connected appliances and insure the coefficient of their employment.
At the time of the need to select the protection of the wiring, which is already practicable, it is necessary to designate the strum of the scope of the measure and equalize it with the necessary strum, which is knowledge for the help of theoretical rozrakhunkiv.

Hello, dear readers and guests of the site "Notatki electrician".

Virishiv write an article about the development of a nominal stream for a three-phase electric motor.

Why food is relevant and should not be so foldable, but I often blame pardons at the rozrahunka.

As a butt for rozrahunka, I will take a three-phase asynchronous motor АІР71А4 with an intensity of 0.55 (kW).

yoga axis old look that tag with technical data.

What engine do you plan to connect before three-phase mesh 380 (B), so that the yoga windings need to be connected to the “zirka” scheme, then. on the terminal block it is necessary to connect V2, U2 and W2 wires between themselves for additional special jumpers.

When connected to a three-phase motor, a three-phase line with a voltage of 220 (V) of the winding is necessary to connect a three-coil, tobto. install three jumpers: U1-W2, V1-U2 and W1-V2.

Otzhe, let's do it.

Respect! The pressure on the nameplate of the engine is indicated not electrical, but mechanical, that is. mechanical stress on the motor shaft. About tse it is clear from the orderly GOST R 52776-2007, clause 5.5.3:

Korisnu mechanical tightness means P2.

More likely, on the beer they show the fatigue of the Chinese forces (c.s.), but I have never experienced such a thing in my practice. For information: 1 (k.s.) \u003d 745.7 (Watts).

Ale us tsіkavit itself electrical pressure, then. tightness, which spozhivaetsya dvigun іz merezhі. Active electrical tension is indicated, like P1 and it will be greater than mechanical tension P2, because she has insured all the expenses of the dvigun.

1. Mechanical waste (Pmech.)

Before the mechanical losses, one can see the friction at the bearings and ventilation. Їх the value of deposit in the form of revolutions of the engine, tobto. scho speed, tim more mechanical waste.

For asynchronous three-phase motors with a phase rotor, they are also protected by wires between shields and contact rings. You can report on the power of asynchronous motors.

2. Magnetic waste (Рmagn.)

The magnetic waste is blamed on the “flying” of the magnetic circuit. They can be seen to spend on hysteresis and vortex jets during remagnetization of the core.

The value of the magnetic losses in the stator depends on the frequency of the remagnetization of the first core. The frequency is now set to 50 (Hz).

The magnetic loss at the rotor lies in the frequency of the remagnetization of the rotor. Tsya frequency to become 2-4 (Hz) and lie down in the value of forging the engine. However, if you spend a small amount of magnetic energy in the rotors, you won’t be afraid of it in the roses.

3. Electrical input at the stator winding (Re1)

Electricity is spent in the windings of the stator and the heating of the streams that pass through them. The more strums, the more dviguns, the more electricity wasted - everything is logical.

4. Electricity in the rotors (Re2)

Electrical inputs at the rotor and similar inputs at the stator winding.

5. Other additional expenses (Rdob.)

Before the additional inputs, you can see other harmonics of the magnetic breaking force, the pulsation of the magnetic induction in the teeth, and so on. If you spend it even more importantly, it’s better to take it, like 0.5% in case of reduced active tension P1.

You know that in a motor, electrical energy is transformed into mechanical energy. To explain a little of the report, then when the electric active pressure P1 of the deac is brought to the engine, a part of it is drawn on the electrical inputs in the stator winding and magnetic inputs in the magnetic circuit. Then the excessive electromagnetism is transferred to the rotor, when it is rubbed off on the electrical inputs in the rotors and is transformed into mechanical tension. Part of the mechanical tightness changes for the fluctuations of the mechanical and additional inputs. As a result, the mechanical stiffness, which is gone, is the main stiffness P2 on the motor shaft.

All values ​​are embedded in a single parameter - the coefficient of the core displacement (KKD) of the engine, which is indicated by the symbol "η" and is assigned to the formula:

Speaking of which, the CCF is approximately 0.75-0.88 for engines under 10 (kW) and 0.9-0.94 for engines over 10 (kW).

Once again, we are beastly to the bottom, which is seen in this article of the AIP71A4 engine.

The following data is indicated on the yoga nameplate:

• engine type АІР71А4
• factory number XXXXX
• rіd strumu - change
• number of phases - three-phase
• life cycle frequency 50 (Hz)
• winding circuit ∆/Y
• nominal voltage 220/380 (V)
• nominal strum with tricot 2.7 (A) / with strum 1.6 (A)
• nominal core pressure on the shaft P2 = 0.55 (kW) = 550 (W)
• wrapping frequency 1360 (rpm)
• CCD 75% (η = 0.75)
• tension coefficient cosφ = 0.71
• robotic mode S1
• insulation class F
• zahistu class IP54
• the name of the enterprise and the edge of the virobnik
• rіk release 2007

Razrahunok rated jet electric motor

It is necessary for us to know the electrically active tension of P1 with the help of the formula:

P1 \u003d P2 / η \u003d 550 / 0.75 \u003d 733.33 (W)

The magnitude of the tension is given by the formula in watts, and the voltage is in volts. KKD (η) and coefficient of tension (cosφ) are undefined values.

Alecia is not enough, to that we did not count the coefficient of tightness (cosφ ) , And the engine is actively-inductive navantage, so for the purpose of denoting a new slow down tension of the engine, it is speeded up by the formula:

S = P1/cosφ = 733.33/0.71 = 1032.85 (VA)

We know the nominal strum of the engine when the windings are connected to the star:

Inom \u003d S / (1.73 U) \u003d 1032.85 / (1.73 380) \u003d 1.57 (A)

We know the nominal strum of the engine when the windings are connected to the tricout:

Inom \u003d S / (1.73 U) \u003d 1032.85 / (1.73 220) \u003d 2.71 (A)

Like a bachite, meaning, what we saw, equal to the strums, we will be assigned to the dvigun's stock.

For simplicity, the above formulas can be combined into one single formula. The result looks like:

Inom = P2/(1.73 U cosφ η)

Therefore, in order to determine the nominal strum of the engine, it is necessary to use the formula to represent the mechanical tension P2, taken from the tag, with the adjustment of the KKD and the pressure coefficient (cosφ), as indicated on the same number or the passport for the electric motor.

Revisit the formula again.

Strum dviguna when connecting the windings at the star:

Inom \u003d P2 / (1.73 U cosφ η) \u003d 550 / (1.73 380 0.71 0.75) \u003d 1.57 (A)

Strum dviguna when windings are connected to trikutnik:

Inom \u003d P2 / (1.73 U cosφ η) \u003d 550 / (1.73 220 0.71 0.75) \u003d 2.71 (A)

I am convinced that everything has made sense.

Apply

Virishiv bring more sprigs of applications different types moving and straining. Razrahuyemo їх nominal strums and equally zі strums indicated on їх tags.

Like a bachite, the whole engine can only be connected to a three-phase line with a voltage of 380 (V), because yogo windings were taken into the star in the middle of the engine, and a total of three points were put into the terminal block, to that:

Inom \u003d P2 / (1.73 U cosφ η) \u003d 1500 / (1.73 380 0.85 0.82) \u003d 3.27 (A)

The subtractive strum 3.27 (A) is consistent with the nominal strum 3.26 (A) indicated on the tag.

Danish engine can be connected to a three-phase line with a voltage, like 380 (V) star, and 220 (V) tricoutnik, because. at the terminal at the new one, 6 kіntsіv were shown:

Inom \u003d P2 / (1.73 U cosφ η) \u003d 3000 / (1.73 380 0.83 0.83) \u003d 6.62 (A) - star

Inom \u003d P2 / (1.73 U cosφ η) \u003d 3000 / (1.73 220 0.83 0.83) \u003d 11.44 (A) - trikutnik

Removing the value of streaks for different schemes of winding connection is consistent with the rated streaks assigned on the meter.

3. Asynchronous motorАІРС100А4 intensity 4.25 (kW)

Similar to the front.

Inom \u003d P2 / (1.73 U cosφ η) \u003d 4250 / (1.73 380 0.78 0.82) \u003d 10.1 (A) - star

Inom \u003d P2 / (1.73 U cosφ η) \u003d 4250 / (1.73 220 0.78 0.82) \u003d 17.45 (A) - trikutnik

Razrahunkovі values ​​of strums for different schemes of windings connection correspond to rated strums, assigned to the nameplate of the motor.

This motor can only be connected to a three-phase line with a voltage of 6 (kV). Scheme of connection of yoga windings - zirka.

Inom \u003d P2 / (1.73 U cosφ η) \u003d 630000 / (1.73 6000 0.86 0.947) \u003d 74.52 (A)

Rosrakhunkovy strum 74.52 (A) corresponds to the nominal strum 74.5 (A) indicated on the tag.

Additional

The above formulas are remarkably good and according to them, the calculation is more accurate, but in the people it is more simplified and approximate the formula for the calculation of the nominal strum of the dvigun, as the largest extension of the nabula of the middle of the household and the master.

Everything is simple. Take the pressure of the engine in kilowatts, indicated on the scale and multiply її by 2 - the axis is ready for you. Only the price of the river for engines 380 (B), selected from the mirror. You can distort and multiply the pressures of inducing more dvigunіv. And especially, I will pour you more victorious precise methods rozrahunka.

P.S. And the axis is now, as we have already been appointed from strums, you can proceed to the selection of an automatic vimikacha, zapobіzhnikіv, thermal protection of the engine and contactors for yoga keruvannya. I will tell you about it in my publications. In order not to miss the release of new articles, subscribe to the newsletter of the site “Notatki Electrician”. Until new zustrіches.

Side 2

By the nominal strength of the struma of the fusible defender, the greatest strength of the struma is taken into account, as the defender can see it for a long time, not roaring. Vaughn vkazuєtsya on the insertion of the zapobіzhnik. Ale, the strength of the struma of melting the insertion of the zapobіzhnik to lie down due to low reasons і usampered vіd trevalnosti navantazhennya by the strum and the minds of the zapobіzhnik's cooling.

For the nominal forces of the struma, the following normal scale was adopted: 200, 400, 600, 1000, 1500, 2000, 3000 and 4000 A.

The block of insurance for the nominal power of the stream is 10 A, the maximum is 30 A, the weight of yoga is 2 kg. Checkpoints on the cable zv'yazku rozmіshchuyut on cable couplings zadnuvalnyh z krok 800 - 1000 m, scho vіdpovida budіvelnіy dovzhіnі cable. Independent control and monitoring points are installed on gas pipelines. The armor and sheathing of the cable in good couplings do not flicker, but the conductors in the KVP, which can five clamps, but also the armor of the sheathing and mark them.

If the generator will supply the rated power of the stream and the first voltage, if it is not less than 12 5 for 12-volt generators and 25 for 24-volt generators, then we will compare it. At the time of the change in the power supply, the struma is closed by a conductor of the zatiskachi I and Sh of the generator; If so, if the voltage and power of the generator jet move, then the relay-regulator should be put in a faulty state.

Insurance coverage is based on the nominal power of the strum 200 and 400 A.

Command controllers of the KA-5000 series for a nominal force of the jet up to 15 A can operate up to 12 working lances and zero position according to the same position of the handle in the skin side. The handle can be fixed in the skin position or turned in the zero position.

The windings of the electric motor are covered by the nominal power of the strum. With less strain, the strength of the struma increases. In addition, the increase in the strength of the struma occurs when the voltage is changed in the measure and when one phase is switched on. If the shaving of the phase becomes less than an hour when the compressor is stopped, then when the electric motor is turned on, the tension is insufficient to accelerate the compressor. The strength of the struma in the windings is approximately four times greater than the nominal value. The engine does not spin up and overheats a lot.

One of the main characteristics of automatic machines is the rated strum, so the ranks of the strum of the automatic machine, the permissible strum of the machine and the amperage. The value of the nominal stream is specified on the basis of the value of the stream, in parallel with it, the automatic vimikacha is transferred to the transfer of the charge. May be the main parameter of the machine, the nominal stream of the language is indicated in the marking of automatic variables. The limit of the nominal scope of the machine for marking the automatic markers itself includes a lot of other parameters of the machine, which describe the characteristics of the automatic marker for marking.

Strum machine - identification

As one of the most important parameters of the machine, characteristic nominal strum of automatic vimikacha number 25, indicated at the winery of the image and the values ​​​​of the nominal stream of the C25 2P machine, the number of poles, which is more than two, can be seen without marking ring to enter at the name of the reference (article, nomenclature) of the machine and indicate on the body of the vimikacha as a marking. Crime of the nominal strum in the marking bath is also indicated by such characteristics as the hour-strum characteristic, the boundary strum of a short hum, operating voltage and type of struma, the number of poles may not be specified.
When you collect a large amount of information, which should be entered at the marking machine, the value of the strum face value of the machine is indicated the most, the strum scales indicate the main function of the automatic meter and allow you to designate the machine’s stability for that tієї chi meti.

Ratings of machines

Automatic machines with different denominations can be placed in different types, however, the denominations of modular automatic machines can be divided into sprat groups of the type of standing. Such a podіl is not exactly necessary, it allows for the type of lancet that is being protected, and its purpose is to approximately designate the range of ratings of automatic machines, so that they can be victorious for zahistu. Sometimes it’s important to write on the machines at the rozpodilnіy shafі if necessary, if necessary, swidko znestrumiti.

Automatic vimics are weak

To low-current automatic vimics, you can carry automatics with a rating of 1A, 2A and 3A. Due to the small struma, and as a result, the low pressure of the vanishing, tsі automatically zastosovyvaetsya mainly in technological purposes on the options or in specific zastosuvannya with small navantazhennyami (for example, for the protection of the line of life of the industrial controller) active tension, spozhivane navantazhennyam on the line 3-amp automatic protector to become a total of 660 watts for single-phase lanceug 220 volts, for example, the same tension is not too hard for electric power.

Automatic vimikaci of average tension

Up to an average tension and a moderately average strum, it is possible to carry automatic vibrations with a nominal strum from 6 amperes to 32 amperes. on-butovyh electrical circuit, and on the variant, scallops will protect the line from the exhaustion from 1.3 kW to 7 kW. Zastosuvannya 6A and 10A automatically sound the lights, 16A, 20A and 25A automatically sound like automatic guards for living (apartments, small dachas with reduced heat from 3.5 kW to 5.5 kW). 32 ampere automatic machine is ready to supply even 7 kW of single-phase power supply, which is enough to complete a large and energy-efficient apartment.

Automatic vimikachi high tension

Up to high pressure automatics with powerful working strums, it is possible to insert automatics with a 40 amp strum. up to 63 amperes, which can be seen from 9kW power up to practically 14kW and can be powered great apartment, so i decent deputy house. The automatons of the great strums show particular reluctance when choosing great strum in absolute value in Amperes, it can be great (pardon by 10% at 63 Amperes is already 6.3 amperes), which can lead to destruction of the electrical wiring.

Denomination of bagatopole machine

If the nominal stream of a bagatopole automatic machine does not match the nominal value of a single-pole automatic vimikach, then the value of tension, which will be trimmed, will be the same, the crime will come to an advantage with the "tricutnik" scheme. In times of such tension, tension, which is known, settles for a phase-neutral voltage difference, and for a phase-to-phase voltage difference, equal to 380 Volts. As a result, the total tension increases by approximately 1.8 times with such a stream in three single-phase navants.