Electric automatic vіdmіnnosti characteristics. What are characteristics B, C and D for automatic machines

Por_vnyano s the most famous vimicachs automatically located at the rozpodіlnyh closets and are used for the protection of electrical wiring in the form of short flickers and rewiring when cutting the voltage. Marking of automatic vimics, applied to the case, to cover the main characteristics. According to them, you can take a look at the outside information about the attachment.

Automatic display: marking and recognition

There are many types of automatic machines, for example, the old type - AE20XXX.

For example, for the AE2044 machine, the marking is deciphered as follows: 20 - expansion, 4 - 63 A, 4 - single-pole with thermal and electromagnetic expansion. Outbuildings are decorated with a characteristic black color of the carbolite body.

The automatic marking scheme is standardized. Її the main method є it was most reasonable to convey to the view of the coristuvachіv the main parameters of the annex.

Marking is read on the body from the bottom to the bottom.

1. Virobnik chi trademark - Schneider, ABB, IEK, EKF.
2. Serial number of the catalog (series S200Y, SH200 of ABB company).
3. Hour-strum characteristic (A, B, C) and rating in amperes (I nom.).
4. The maximum allowable value of strums included at k.
5. Jetting class.
6. The article of the virobnik, for which you can know Danish type catalog machine.

The small picture below shows how the marking of ABB and Schneider automatic markers is carried out.

The button for remikation is marked or a chervonim is indicated. If there is more than one and vikonana onslaught, then the squeezed position means that there are closures.

Marking of automatic tags from the main tags is done by using QR-codes, which displays all the information about the model. Your presence is a kind of guarantee of quality.

Infusion of the middle

1. The temperature range for standard models ranges from -5 to +40 °C. For robots, special models are issued for these between them.
2. The operation of the apparatus is allowed for a moisture content of up to 50% at 40 °C. With a decrease in temperature, moisture content is allowed to increase (up to 90% at 20 ° C).

Types of automatic

Automatics are picked up fallowly in the form of electrical circuits.

1. Single-pole machine

Attachments are vicorated in single-phase lines. The phase is connected to the upper terminal, and the transition is connected to the lower one. The connection to the device is carried out at the opening of the phase door with the method of switching on the life in the event of an emergency.

2. Bipolar machine

Structurally, it is attached as a block of two single-terminal networks, connected with each other. The blocking between the switching-on mechanisms was done in such a way that the phase was switched on before zero (according to the rules of the PUE).

3. Tripole machine

Attachment to serve for a one-hour stay at the time of an accident. Tripole is going to be combined 3 unipoles with on-line work at one hour spratsovuvannya. Electromagnetic and thermal rosettes are fixed around the skin contour.

Automatic vimicach: characteristics

Automatic machines can have different hour-strum characteristics:

a) fallow water;
b) independent view of the struma;
c) two-stage;
d) three-step.

Large Latin letters B, C, D can be used on the cases of most automatic machines.

1. B - thermal protection spratsovuє after 4-5 s with a 3-fold increase in nominal value, and electromagnetic - after 0.015 s. Outbuildings are designated for navantazhen with small values ​​of starting streams, lighting lighting.
2. C - the widest characteristic of automatic machines that protect electrical installations
3. D - automatic equipment for launching large strums.

The peculiarity of the hour-strum characteristic is due to the fact that, with the same ratings of automatic machines of types B, C and D, they are switched on at different movements of the strum.

Other types of automatic machines

1. MA - without thermal opening. As a strum relay is installed in the lance, it is enough to install an automatic switch less than a short-circuited sound.
2. A - thermal rozchipluvach spratsovuє for transportation I nom. at 1.3 times. At this time, the hour of inclusion can become 1 year. If the denomination is overwhelmed twice and larger, the spratsovuє strumovy plyuvach after 0.05 s. At the time of failure of the first zahist after 20-30 s, the dіє zahist by overheating. The automatic machine with characteristic A is designed for the protection of electronics. Here, too, there are attachments with characteristic Z.

Criteria for choosing automatic machines

1. I nom. - revisiting what to bring to spratsovuvannya zahistu vіd navantazhennya. The nominal value is selected after the allowable maximum wiring stream, and then we change it by 10-15%, choosing it from the standard row.
2. Strum spratsovuvannya. Switching class automatic vimicach pick up fallow according to the type of advancement. For other purposes, the widest characteristic is Z.
3. Selectivity is the power of a selective inclusion. Automatically vibrate according to the nominal stream, so that the attachments are placed on the side of the feed. We are turned on by the guards at the missions; Timchasov selectivity is selected in such a rank, so that the hour of spratsovuvannya would be greater at the machine, ruffled closer to the neck of life.
4. Number of poles. On the triphasic introduction the automatic machine is connected from chotirma with poles, and for single-phase - with one or two. Illumination that by-butov technique practice on unipoles. Like in a booth - an electric boiler or a three-phase electric motor, for them there are three-pole automatics.

Other parameters

If an automatic switch is attached, the characteristics of the faulty will vary depending on the minds of exploitation and connection. Leather automatic insurance repayment machine for the number of cycles of spratsovuvannya. Yak vimikach navantazhennya yogo zastosovuvati is not recommended. The number of automatic machines is selected according to demand. Obov'yazkovo is restored introductory, and after a new one - on the line of illumination, sockets that are OKremo up to hard-pressing people. Ways of fastening different models can be adjusted. To that, we choose extensions, similarly we will install them at the wardrobe.

Visnovok

Marking of automatic vimics is necessary for their choice depending on specific needs. These characteristics are directly related to the wiring harness and types of tension. In case of short chimes, we are going to use the electro-magnetic switches in front of us;

During normal operation, electrical connections and all accessories flow through the automatic switch electric strum. However, as the power of the strum, for some reason or other, outweighed the nominal value, the lancet rose through the spratsyuvannya of the automatic vimikach.

Characteristics of the application of automatic vimikacha It is also an important characteristic, as they describe how much time the automatic machine needs to be deposited in the presence of the force of the stream that flows through the machine, to the nominal stream of the machine.

Tsya characteristic is foldable because її vyslovlyuvannya nebhіdne vykoristannya graphіkіv. Automatics with this very denomination will be at different permutations of the struma in a different way, depending on the type of curve of the automaton (this is how the strum characteristic is called), why it is possible to stop the automatics with different characteristics for different types of saturation.

Tim himself, from one side, the strum function is working, from the other side, it is safe minimum quantity hibnih spratsovuvan - for whom the importance of given characteristics.

There are situations in energy galuzias, if a short-term increase in struma is not caused by the appearance of an emergency regime, and the defender is not guilty of reacting to such changes. Tse itself costs and avtomativ.

When such a dvigun is turned on, for example, a country pump or a pilosos, in the line it is possible to finish a great throw of the strum, which in a sprat once outweighs the normal one.

Behind the logic of a robot, an automatic machine, obviously, it can turn on. For example, the engine runs at 12 A in the starting mode, and 5 A in the working mode. What is it like to work in such a time? If you put it on 16 A, then it’s unreasonable to turn it on or jam the motor or short the cable.

It would be possible to solve this problem, as if to put it on a smaller strum, or else to spratsovuvatime in the face of any kind of rush. The axis for which and was invented such a concept for the machine, yak hour strum characteristic».

Yakі іsnuyet h strumovі characteristics of automatic vimikaіv and їх vіdmіnіstі vіzh themselves

As seen by the main organs of spratsovuvannya automatic vimikacha є thermal and electromagnetic rozchipluvach.

The thermal expansion valve is a plate with a bimetal, which bends when heated by a jet, which flows through. Tim himself at the diyu to induce the mechanism of splitting, with a trivial effort of spratsovuchi, from the back-and-forth vitreous hour. Heating of a bimetal plate that hour spratsovuvannya rozchіpluvach without intermediary lie down in the vіd vіvnya navantazhennya.

Електромагнітний розчіплювач є соленоїдом із сердечником, магнітне поле соленоїда при певному струмі втягує сердечник, що приводить у дію механізм розчеплення – відбувається миттєве спрацьовування при КЗ, завдяки чому постраждала ділянка мережі не чекатиме прогрівання теплового розчіплювача (біметалічної пластини) в автоматі.

The time of spratsovuvannya vіd vіd force strumu, scho flowing through the vending machine, іkraz i sign hour by the strum characteristic of the automatic vimicach.

Chantly, having marked the images of the Latin letters B, C, D on the cases of modular automatic machines. So stinks characterize the multiplicity of the setting of the electromagnetic switch to the nominal value of the machine, indicating one hour of the strum characteristic.

Qi letters indicate the strum of a special spratsovuvannya of an electromagnetic splitting machine. It seems simpler, showing the sensitivity of the automaton - the smallest strum when the automaton turns on automatically.

Automatically calculate a piece of characteristics, the widest of which are:

• - B - type 3 to 5 × In;
• - C - vіd 5 to 10 × In;
• - D - type 10 to 20 × In.

What do the numbers indicated above mean?

I'll give you a small example. Admissible, є two automatics of the same tension (equal for the nominal strum) but the characteristics of the spratsovuvannya (Latin letters on the automatics) are different: automatics B16 and C16.

The range of operation of the electro-magnetic blower for B16 is 16 * (3 ... 5) = 48 ... 80A. For C16, the range of strums of the mitteva is 16 * (5 ... 10) \u003d 80 ... 160A.

At a stream of 100 A, the B16 machine will turn on even more mittevoly, but C16 will not turn on immediately after a few seconds of thermal protection (after that, the bimetal plate will heat up).

In residential houses and apartments, the deactivation is purely active (without great starting streams), and if the exhaust motors are turned on infrequently, the most sensitive and shortest to zastosuvannya є automatic with characteristic B. Today, characteristic C has also been expanded, as it is also possible to win for living ones. administrative budіvel.

As far as characteristics D are concerned, then it is suitable for life, whether it be electric motors, great engines and other outbuildings, which can be used with their large starting jets turned on. Also, due to the reduced sensitivity in case of short circuit, automation with characteristic D can be recommended for selection as an entry for increasing the chances of selectivity with group AB in case of short circuit, which should be lower.

Wait logically, what is the hour of spratsovuvannya to lie down at the temperature of the machine. The automatic machine turns faster, like a thermal organ (bimetal plate) rose. І navpaki with the first inclusion if the automatic machine was metal cold hour there will be more inclusion.

Therefore, on the graph, the upper curve characterizes the cold mill of the machine, the lower curve characterizes the hot mill of the machine.

The dotted line marks the boundary spratsovuvannya for automatic devices up to 32 A.

What is shown on the graph of the strum characteristic

On the butt of a 16-ampere automatic machine, which has an hour for the strum characteristic C, we can try to look at characteristics of the application of automatic vimics.

You can hit the graphics like a strum, which flows through the automatic switch, pouring into the fallow time. The multiplicity of the strum flowing in the lance to the nominal strum of the machine (I / In) shows all X, and the hour of operation, in seconds - all Y.

It was more said that an electro-magnetic and a thermal rozchipluvach enter the warehouse of the machine. Therefore, the schedule can be divided into two plots. The steep part of the graph shows the protection of the type of heating (the robot of the thermal expansion valve), and the larger part of the canopy shows the protection of the type of short circuit (the robot of the electromagnetic expansion device).

As you can see on the graph, it’s possible to turn on the connection to the automatic machine C16 23 And it’s guilty to turn on in 40 seconds. Tobto when vanishing by 45%, the machine will turn on after 40 seconds.

On streams of great magnitude, which can lead to poor electrical wiring insulation, the automatic building reacts to the air of the presence of an electromagnetic rozchipluvach.

When passing through the automatic C16 strum 5 × In (80 A), the wine is guilty of spratsyuvati after 0.02 seconds (it's like a hot automatic). At a cold camp, with such an urge to turn on in the range of 11 seconds. that 25 sec. (For automatic devices up to 32 A and more than 32 A vіdpovіdno).

If a strum is equal to 10 × In through the automatic machine, then the wine is turned on in 0.03 seconds in a cold state, or less than in 0.01 second in a hot state.

For example, when short flicker in Lancey, which is theft of the C16 automatic machine, and the viknennі struma is 320 Amperes, the range of the hour when the automatic machine is turned on becomes 0.008 to 0.015 seconds. Tse allow the removal of livelihood from the emergency lance and the protection of the spalah and the complete destruction of the machine itself, which shorted the electrical appliance and the electrical wiring.

Automatics with some characteristics are better than vicory at home

The apartments must be obov'yazkovo zastosovuvat automatic category B, which is more sensitive. The Danish automatic machine vіdpratsyuє vіd navantazhennya so it is, like an automatic rifle of category С.

If the booth is new, if there is a good station for electric power, the substation has a charge, and all the alarms are ok, then the strum, with a short faucet, can reach such values ​​that you can put it on the spratsovuvannya navit of the introductory machine.

The strum can appear small with a short zamikanny, as if the alarm clock is old, and the filthy darts with the majestic support of the line go to the new one (especially in strong lines, de great loop phase-zero loop) - in this case, an automatic machine of category C may not be spratsyuvati vzagali. Therefore, the only way out of the situation is the installation of automatic devices with a characteristic type U.

Navit at the reference electrical conduit and with the correct possession, connected to it, blame the emergency modes. Oskilki cable lines can not last an hour to withstand emergency situations, the stench heats up, the insulation of conductors melts. Let's sweat and burn that fire. For the protection of electrical appliances and wires in abnormal modes, the robot will serve as an automatic switch, which is switched on at the time of the rise of the stream.

To describe the principle of automatic vimikacha let's look at the robot of two independent ones, one type of one opening, which enters to the first warehouse. For the inclusion of short zamikan (KZ) serve as a rozchіpuvach mitteva ї dії (vіdsіkannya), the titles are also electro-magnetic. The principle of yoga robots is based on the displacement of the coil rod when the struma is passed through it. As long as the value is over the allowable range, there is no movement of the stock. But if it changes the value (setpoint), the rod hits according to the plan, which turns on, and the automatic switch turns on under the springs.

Rozchipluvach vіd navantazhennya, ranks are warmer, spratsovuє s vitrima hour. The connections in series with the electro-magnetic and are a bimetal plate, which begins to bend with a singing stream. The value of yoga for different models is set to 1.3 - 1.45 times more than the nominal one, when the automatic switch is turned on, so that you do not stumble on it. The operation of the thermal splitter is based on the principle of back-and-forth characteristics: the larger the strum passes through the plate, the more it bends and the more it turns on. On the way, the plate is pressed on the bar, which you can see. Such a principle of work can be a kind of automatic switch from a thermomagnetic switch.

Classification of automatic vimics of the butt series

Rated jets of modular types of standard sizes can be selected from 0.5 to 63 A.

0,5

1,0

1,6

2,0

2,5

3,0

4,0

5,0

6,0

8,0

10

13

16

20

25

32

40

50

63

Models for 80, 100 and 125 A are available in cases of larger dimensions.

Automatic vimikach includes one, two, three or more poles in the fallow type of recognition:

Deyakі see automatic vimikaciv

• 1 pole - for single-phase rozpodіlnyh merezh standing ta variable voltage;
• 2 poles - for the introduction of life in single-phase lines, yakі otrimuyut zhivlennia in the lines of power transmission. The other pole is assigned for switching zero dart Shards are not included in the presence of a new potential that is not safe for life. Two poles are also necessary for the lances of the constant voltage;
• 3 poles - for three-phase mesh variable voltage;
• 4 poles - for three-phase strands insulated neutral that vipadkіv, if according to the rules it is necessary to switch on in case of short circuit at the zero working conductor.

The nominal boundary value of the switch-on is the maximum short-circuit strum, which can turn on the automatic switch without shkod for yourself. At different times, the hull may have been relocated. Modular automation can switch on the building from 4500 to 25000 A.

Classes (performance characteristics) of automatic vimics

Mittevi rozchіpluvachі are not prepared for the exact amount of spratsovuvannya. Vaughn maє rozkid, scho fit in the singing range. The fallow type of the modular series is divided into classes of characteristics of spratsovuvannya.

Іsnuyet and іnshі class, but їхнє zastosuvannya is surrounded by special-purpose virobs of industrial zastosuvannya.

Automatics of classes "B" and "C" are most likely to be stuck in the butt chains. Class "B" in case of which it is installed without intermediary at the helper, and "C" can protect a group of supporters, which may be defending class "B". Thus, the necessary sensitivity of the robot is ensured, even if it becomes larger in the future, the vitality of the short-wave strum will change, and the apparatus of class “Z” may be the same.

There is a thought, that the selectivity (selectivity) of the inclusion of small litters is so safe. Tobto vymikatimutsya less than a dilyanka merezhі z poshkodzhennyam. But, as practice has shown, how to measure the magnitude of the short circuit for spratsovuvannya both sequentially connected automatic machines with characteristics B and C, the stench is spratsyuyut one hour. Adzhe hour of spratsovuvannya їhny vіdsіchennya - however. Therefore, the inclusion of all apartments in case of a short circuit at the rosette, theft personally, the better is inevitable. Ale better so, anіzh nіyak.

Selectivity can be ensured by an automatic switch from a napіvprovіdnikovy rozchіpluvаch, which can be used to install a spratsovuvannya vіdsіchka. The new one has implemented a different principle of robotics - the use of sensors electronic circuit, How to process the meanings of the values ​​\u200b\u200bwaving them, Ale, however, virobi vikoristovuyutsya in industrial settings and not vikorivuyutsya in the butt. The stench allows you to set the exact values ​​of the parameters for the calculation of the voltage and the stink itself for the voltage of hundreds and thousands of amperes.

Rozchipluvach s characteristic "D" zastosovuetsya for zahistu elektrodvigunіv, yakі spozhivayut when launching the strum, which in a kіlka times change the nominal.

Buttstock characteristics class C: a - the zone of the back-and-forth windshield by the hour, b - the zone of observation

The hour of operation of the thermal expansion can be calculated as an hour-strum characteristic. Vaughn is unique for the skin type, and it is induced by the passport data of the virobnik plant. The butt of the characteristic class "Z" is shown on the little one. There are two zones on it:

• A - back-and-forth vitrimka by the hour;
• B - vіdsіchennya.

All characteristics of real variables do not go beyond the border between two lines, which indicate the allowable distribution of parameters.

Automatic vimic can be supplemented with elements of service functions. Axis of action from them:

• I will become contacts, serve on the molding of information for the attachment of automation for the installation of power contacts;
• emergency contacts that flicker when switched on;
• calculation of the minimum (maximum) voltage, which turns on the machine when the voltage is reduced (increased) in the life span;
• nezalezhnі rozchipluvachі, scho vіdklyuchayut vіd vіd ovnіshny pristroya keruvannya. Vikoristovuyutsya for the inclusion of an alarm at the hour of the fire alarm.

Apply additional accessories for the modular series

To install additional accessories, plugs are removed from the body of the machine, which close the door for connection with the mechanical part. The element itself is fixed on the body.

Outbuildings for lancets for constant pressure

I will attach a butt for lanceugs for constant tension

At the same time, the designs of electromagnetic coils for the changeable voltage are suspended in a constant state, for the protection of these coils, special automatic machines are installed. You can check them for the marking of the polarity of the connection on the case. Dotrimuvatisya tsієї polarity obov'yazkovo: in case of incorrect switching, the output will not work. Otherwise, the principle of work does not change.

Stop the stench of the Lantsyugah management and the life of the spozhivachiv, who work on the type of batteries.

The graph of the hour-strum characteristic D of the automatic vimikacha is adjusted according to B and C. Timing, that the speed of switching on the flow stream is vibrated in the range of 10 to 14 times the nominal displacement of the automatic vimikacha.
The specificity of the hour-stream characteristic D is due to the fact that the automatic characteristic D is mainly used in industry, for the protection of electric motors and lines. Since, when starting the electric motor, it is not immediately possible to enter the nominal mode, but the current hour is broken, then the start-up streams at the time of the acceleration of the electric motor significantly change the stream, which the engine is in normal, operating mode and can reach a tenfold value of the characteristics of the working stream C, automatic Tim. it is not possible to beat more B for such purposes, since it will make it impossible to start the electric motor at the link with a sudden attack after the start of the automatic switch-on from the displacement of the struma.
The automatic machine of characteristic D with a nominal value of 40 Amperes does not turn off when starting the electric motor, so that the starting strum reaches 400 amperes per hour less than 1 second, so the screw itself may not turn off even with more high strums, in addition to a longer period of the starting strum.

Characteristic D

On the graph of the hour-strum characteristic D, it is clearly seen that the thermal expansion, whose speed of operation is carried out up to the hour of the greater lower than 15 milliseconds, allows the starting strum, which is not included, up to three nominal values, five seconds, five seconds, five seconds ten denominations in a stretch of one second. . However, at start-up, the most intense starting jet is established at the moment when the life is turned on, and then, around the world, the rotation of the rotor of the engine changes, increasing to the nominal jet of the electric motor, then if the machine is not switched off at the first moment, then you will talk about the wrong vibration of the machine, then The further process of starting the electric motor went through normally, but the automatic switch does not connect to the starting jet.

Characteristic D

Electromagnetic blower, whose operation is described by the lower part of the graph of the hour-strom characteristic D, is characterized by a high, millisecond, speedy performance at high streams, which flows through the coil of the blower.
Appliances and characteristics of the electro-magnetic blower of the strum characteristic D practically do not differ from the characteristics of the blower for curves B and C, so that in all variants of automatic blowers, the electromagnetic blower can serve to intimidate the shortest blow and not be connected to the machine.

For zahistu elektrichnyh lansyugіv vіd trivaly strumovyh revantazhen I\u003e In that short zamikannya Ikz zastosovuyutsya automatically vimikachi (modular automatic). Structurally, the stench is formed from the installation of terminals, contacts, an arc extinguisher in a non-combustible plastic case, handmade inclusion, electromagnetic and thermal expansion.

Attachment AB (Fig. 1)

Explanation of work AB

An inductive coil is switched on sequentially between the terminals of the machine, when a great struma passes through it, it works like a magnet, squishing into the zasuvka, which causes the spring mechanism of the contact group, by the same token electric lanceug, guarding the line in the direction of the strum, and the strum of a short zamikannya.

It would have been used, everything is simple: the vanity is overdone - having spratsyuvav zakhist. And at the moment of turning on the electric appliances, the starting jet can change the nominal value by a factor of 1. We ask for a solution - put an electromagnet switch, which shows the most starting point.

Ale, conductors at the lines are insured for a nominal working strum. The stench of the building vitrimuvati short-time tension without being a shkodi, which is wrong with trivaly vacancies, in which case it is carried out to the temperature of burning the insulation, and the vimikach is so not weak, while they lived not to close themselves.

Thermal expansion valve

Expensive solutions may be to increase the cross section of the cable to the value of the starting streams.

Thermal splitter of automatic vimikach (Fig. 2)

Ale, more cheap way save the lines from the spalls, giving them the right to work in the mode of impulse navantage. Whose principle of implementation thermal splitter– bimetal plate, arcuate shape, building vitrimuvat great strums, In the world of heating, change your geometrical parameters by straightening, by the same token, pushing on the trigger mechanism, I will add what you turn on.

Okilki for heating is TRAIDED HAS, then vIMKNENNYA WILD WITH NOT WIDRAZA, but PISLYA ZASKINCHENNEA OF PERIODA, YAI MAV VISTACHITS IN THE STIMIT OF THE Struma Start to the timid, I am the warmth of the ionico, .

Hour-strum characteristics

With a short flash, through a larger, lower support, the plate is instantly warmed up to the melting point, and not caught. To this, they subsequently install an electro-magnetic vimikach, which reacts to a short circuit, practically instantly shaves the lance, protecting the lines, and the electric device and the bimetal plate.

Strum yogo spratsovuvannya (vіdsіchennya) I zavzhd vysche parіnalnogo vzakazan on pristroї. Setting I to the nominal value, coefficient k= I/In is called the hour-strum characteristic nominal strum, looking like Latin letters (div. Fig. 3):

• A, k = 1.3. Vykoristovuetsya for long-term lines, life of electronic attachments, start-ups may be daily.
• Y, k=5. Appointments for the living of electrical lighting systems, so that there are no great starting streams.
• H, k=10. The most wide-ranging type of automatic vimics. Pochatkovі vantazhennya pomirnі.
• D, k \u003d 25. We see large impulses of the strum, the purpose of servicing electric motors with an important start.

Zastosuvannya in one row sequentially switching on automatic machines with different characteristics allows creating selective zakhist, in case of any abnormal situation on the line, it is not necessary to turn on the main incoming automatic machine.

Schedule different types hour of strum showings (Fig. 3)

The designations of the coefficients mean that with I = k * In the machine will work even more mittevo, zavdyaki to the electromagnetic vimikach. How to strum in the range: In< I < k* In, то время отключения зависит от:

• Dowkill temperature;
• the temperature of the machine itself;
• the visibility of the orders of other practicing modular scientists;
• I’ll build my own kidnappings.

Іsnuyut graphs of zalezhnostі vіd vіd k= I/ In for dermal category. Two lines indicate the range of possible hours of inclusion, the lower one - for a hot outbuilding, the upper one for a cold one. Now it is clear why the speck has an automatic machine.

Apply hour-strum characteristics

Assume that there was a five-fold rewitching of vimicach type C: I = 5 * In. (div. Fig. 4) In a hot, heated by a long robot station, the machine switches on in an hour from 0.02 to 1.1 seconds for an additional bimetal plate, what is heating up. The vertical shows the range of possible hours of practice.

Hour-strum characteristic at 5-fold pretension (Fig. 4)

The straight line of the graphic, going to the right, shows the speed code of the electromechanical drive at a higher level of drive. The curve, which goes to the left and uphill, shows what hour it takes to heat the bimetal plate, to get out<5.

With a double overturned nominal value, the switch will be turned on after 10 seconds maximum (small 5), if you switch the strum a second time, then it will take approximately 40s.

Hour-strum characteristic at 2-fold drive (Fig. 5)

From the graph, it is clear that with k = 1.13 the machine does not work well (Fig. 6). This nuance is called a mental strum is not included, it is necessary to protect it for practical roses.

Hour-strum characteristic at 1.13-fold drive (Fig. 6)

For a cold one, I will add an algorithm for the same. It is worth remembering that the hour of waking up is longer, for the same five-fold advancement, it will be close to thirty seconds. In order to get used to the same period, as to a hot one, you need ten times more effort.

Tse extreme values, for the temperature of the middle + 30 ° W. Actually, the real hour will be at the borders, fallow in the temperature coefficient kt of the superfluous heat and coefficient kn, vrakhovu teplovidlennya іnshih pratsyyuchih poruch avtomatіv.

The graphs show how the stench changes in fallow land depending on the temperature and the number of outbuildings per dyne.

Machine marking

Vykhodyachi z tsgogo, for rozrahunkіv it is necessary to vikoristovuvat scorings, for temperature indications nominal stream In t = In * kn * kt.

Marking of automatic vimikacha

The rated voltage, type, strum, series, picker logo are indicated on the case. It is important not to confuse: the values ​​​​of the short-circuit strum (for example: 4.5 kA), - the value of the indicator, but the short-term bias, as you can see the machine. The most superior and wear resistant products are ABB, Legrand, Siemens, Schneider.