Electrical automatics. See that robot. Characteristics. Automatic vimikachi of a fast strumu: what is it and what are the stinks of vikoristovuyutsya? Low-voltage automatic vimikachi post-strumu

Automatic vimikachi, they are also called "bags", or simply automatic - tse main zasіb zahistu vіd KZ that revantazhen. Zvichaynі pobutovі avtomatichnі vymikachi іz zahistom vіd kzі і thermal іїї ії ії іn thе pereveschennyа struma i vіkoristovі vіd vіd vіd vіd kob vіtro soniachnoi ї elektrostantsії. The only affordable way to protect against short-circuiting of batteries, save wiring from an emergency and emergency situations.

And if there are a lot of people who marvel at my video as to sing zvichayny automatic machines in my power plant, then they immediately write that it’s not possible to win such automatic machines, it’s necessary special for a post-strom or zapobіzhniki. It is necessary to have a large arc on the permanent stream, when the contacts are opened, to burn the machine. Write how much you spend on such machines. In a cryptic way, I have written a report to describe everything with corroborated documents and figures.

In this article, I tell myself about the automatics with the designation "C", the most wide automatics, the stench itself, are found in the largest electrical panels and are sold in stores. Below, on the photo booth of my sonyachnaya power station, 12V switch.

Brief characteristics of automatic vimicators class "C":

Electromagnetic rozchipluvach shouting ryatuvati in the form of a short chirp and spratsovuє behind the strum, but in a way that’s right for you. In practice, I changed the automatic to 10A, and with a strum of 12A, the automatic was spratsovuvav first with a stretch of 30-40 strands, then it was already warmed up richer.

Thermal expansion valve (bimetal plate) pratsyuє for temperature, and more strum tim more heating of the plate, and more hour of spratsovuvannya. When the struma that flows through the machine is equal to its nominal value, the machine is guilty of keeping the year in the fallow temperature. This is why, for example, it is included too richly fitted in the lines, so that the dross does not overheat and the insulation does not melt. In the event of a shifted strum, the machine is guilty of spratsyuvati protyag hvilini, chim vіn more heated, tim more spratsyuє thermal rozchipluvach.

The axis is the characteristics of automatics of the class "C", the peculiarity of this is a large overvantage building, so that the automatics did not knock out when starting the transition with large launching streams. But if it’s not so, then the stench can cope with the task of protecting the electrical wiring.

Vykoristannya avtomatіv zminny strumu on stіyny strumu

The main argument of the opponents of such automatic devices is large and the arc is hard on the steady stream, so that the automatic device can be burned down and the wines can light up the type too thinly. The stench seems to be that on a snake stream the arc itself goes out when passing through zero. But if you marvel at the video de fire the arc on the constant stream 220V and the replacement stream 220V, then there is no difference. That same way earlier, brewers were brewed in the form of brewers of a snake struma, as if the arc was extinguished when passing through zero. The stench would not have been able to ignite it like it was steadily dying out, but the arc is stable and the electrodes would burn miraculously like it was on a steady stream. Below is a video from the first drive.

I myself have tried a lot of times to switch off the automatic switch on a 12V battery, and it’s miraculous to work automatically, and not to fire anything else, having tried and on a 24 volt battery to switch off an automatic switch.

From the drive of the stench on the automatic machines, obviously, є, but not so great as to talk about them. For example, with a stream of 26A, spend on a suspended automatic at 50A close to 0.02 tse zagalne 0.04V * 26 = 1.04 watt. Spend more money with darts if you don’t have enough weight, or for more than five meters.

I think that the automatics need to be installed on the language, and not at the same time, do not connect the inverter and controller directly to the batteries, and other attachments. It’s so that input transistors burn out in such attachments, and it’s good that they just stink with a small sickle, but it’s so that when burning, the transistor’s crystal contacts flicker and flicker, , and the inside of the inverter or the controller.

I haven't had such highs yet, and haven't had great short chimes. Ale buv vipadok if you shorted a small DC / DC switch from 12 to 5 volts. Vіn buv pіklyucheniya thin wire peretina 1.5 kv through the automatic machine for 10A, and when the automatic machine is not closed, the short circuit is small. The conductor caught the trochs melted, but the automatic machine spratsyuvav shvidko and vryatuvav vіd zagoryannya drota and great problems.

So having read here, that a person had a burning inverter, it was impossible to screw the cable to the battery with a clamp and tear the cable with your hands. It happened to terminovo shukati juice and cut the cable, and still shukali juice the inverter continued burning. And the yakby at that moment didn’t show up no one in order, they didn’t catch it, and it started to burn.

• 0.4kV
• vimicach
• zapobizhnik

Storinka 31 from 75

4-13. AUTOMATIC PROTECTION OF THE PERIOD STREAM ON THE RATED DIRECTLY UP TO 24 V

For zahistu vіd nadstrumіv lantsyugіv, scho zhivlyatsya with low-pressure jerseys of a constant strum with a voltage of up to 24 volts, one-pole automatic devices (Fig. 4-40) and a nominal constant strum vіd 2 to 50 a.m. The stench is released of the same size and may be deposited in the strum for an hour with all the strums, the great near-cordon ones, which are known between the nominal strum and 120-130% of the nominal.

Rice. 4-40. Machine gun zahistu merezh post_yny strumu 50 a, 24 tbsp.

When strum, which reaches 200% of the nominal, the time of the vikonan is between 25 - 80 s when heated from a cold state and not less than 5 s after heating with a nominal strum. The cost of construction is up to 10.00, and at a nominal stream, the expansion is up to 10 and 1,500, and for vikonan, a large nominal stream. Warranty service term 10000 inclusive.

A characteristic feature of the design is the presence of a free opening, which in certain situations is quite large, to that which gives the possibility of loosing the machine at a closed station, without regard for the presence of a superstructure.

When the handle is “on”, the contact 1 squeezes to the unbreakable 2 behind the additional pin 8, on which spring the spring 9. When this block 3 squeezes the spring 4. It will vanish because the 5th tooth has jumped behind the tooth 6 of the thermo-metal plate 7. When the thermo-metal plate is shifted, the teeth 5 and 6 come out of the hook, and if the handle does not decrease at the switched on position, then it turns on, so the handle goes to the switched on position and the pin 8 comes out.

4-14. AB-45-1/6000 SEMI-BISTRODY AUTOMATIC

Automatic machine AB-45-1/6000 for a voltage of 750 V, a stream of 6,000 and a constant stream - single-pole, with an electromagnetic drive, a switch, which is switched on, and a maximum switch of a switch, with an adjustable setting of 6,000-12,000. Vіn buv rozrobleniy for zahistu poguzhny installations postіyny strumu, the head rank of metallurgical. The principle kinematic scheme of the automaton is approximately the same as in universal automata; however, it is the time of the day for the exercise of the decrease, for which the maximum expansion with an inductive shunt was set (Fig. 4-41).

Rice. 4-41. Maximum rozchipluvach with inductive shunt for automatic machine AB-45-1/6000 for 6000 I, 750 in constant stream.

A part of the magnetic flux created by the strum, which should pass through the magnetic circuit 1, pass through the shunt 2 and reduce the yakir 3 as it is turned on. At great speeds, the growth of the struma flowed through the utrimu shunt, it grew completely through the infusion of the mid-sleeve 4, which brought the anchor of the rozchipluvach to an accelerated weight.

When tested (L. 4-9), regardless of the magnitude of the speed of the growth of the strum (25-10 + 6 a / sec), its spratsovuvannya hour was 10 - 15 ms, the strum was not surrounded by an automatic machine and reached 200 kA, the machine exploded in the presence of electrodynamic forces In similar minds, the VAB-2 automatic device, having interposed a strum up to 42 kA. The AB-45-1 / 6000 capacity was changed up to 90 kA at a pressure of 500 st.

Who knows a lot about the high school course of physics, what strum is changing and posting. As for the stagnation of the snake strum, we can still say with confidence (all the electric receivers live in the snake strum), then we don’t know anything practical. Ale, yakscho є merezhі postіynogo strumu, it means є і spozhivachі, і vіdpovіdno zahist such іє merges tezh need. De zustrichayutsya spozhivachi post_ynogo strumu th in which vіdminnіst aparatіv vakhistu tsgo genus strumu can be seen at the statistics.

It is not “better” than the type of electric strum, the lower one is suitable for the execution of the main plants: the change strum is ideal for generation, transmission and distribution of electricity on a large windmill, even as a permanent strum, know your special conditions, installation energy, data processing centers, electrical substations, etc.

Shafa rozpodіlu postіyny operative strum of electric substation

The understanding of the signs of the changeable and the constant strum gives a clear indication of the task, from which the automatic signs of the constant strum are sticking. Changing the strum of the industrial frequency (50 Hz) changes its direction in the electric lane 50 times per second and several times “pass” through the zero value. Tsey "transition" of the value of the struma through zero sprays the most obvious extinguishing of the electric arc. In the lancers of a constant stream, the value of the voltage is constant - just like a direct struma is constant at the hour. This fact simplifies the extinguishing of the arc of the permanent strum, and to this, due to special design solutions.

Change the schedules of normal and transitional modes when the following is turned on: a) change strum; b) fast struma

One of these solutions is the choice of a permanent magnet (3). The arc movement in a magnetic field is one of the ways to extinguish in devices up to 1 kV and to know the stopping of modular automatic switches. On the electric arc, as a conductor, the magnetic field is injected, and it is drawn into the arc-extinguishing chamber, de residually extinguished.

1 - Ruhomium contact
2 - non-robust contact
3 - sriblovmisna contact soldering
4 - magnet
5 - arc chamber
6 - bracket

Polarity needs to be checked

There is one more thing, perhaps, the key difference between the automatic vimikachs of the changeable and the constant struma is in the rest of the manifestation of polarity.

Wiring diagrams for a single-pole and two-pole automatic vimikach of a constant stream

If you protect a single-phase line of a zminny stream behind the help of a two-pole automatic vimikacha (with two protected poles), then there is no difference in which poles are connected to a phase or zero conductor. When connected to a continuous stream of automatic vimics, it is necessary to trim the correct polarity. When a single-pole vimikach is connected to a constant stream, the voltage is supplied to terminal “1”, and when a bipolar one is connected, to terminals “1” and “4”.

Why is it so important? marvel video. The author of the video conducts a test run with a 10-amp vimikachem:

1. The inclusion of vimicach in the measure of the pretrial polarity does not mean anything.
2. Vimikach installations at the border of the turning polarity; measure parameters U = 376, I = 7.5 А.
3. Vimikach installations with dotrimanny polarity, and the strum of the lancet to become 40 A, which is 4 times greater than the yogo nominal. A thermal defender, as it can be, having opened the lancet, which is protected, in a few seconds.
4. The last and most important test was carried out with the same 4-fold crossings along the struma and reverse polarity. The result is not zmusiv on itself for a long time check - mitteve borrowing.

In this way, automatic vimikaci postionnogo strumu - tse zahistu, scho zastosovuetsya for objects of alternative energy, automation systems and management of industrial processes and іn. Special hijacking characteristics Z, L, K allow the protection of high-tech industrial enterprises.

From the beginning of the fault of electricians, engineers began to think about the safety of electric fencing and outbuildings in the form of strum fittings. As a result of this, a lot of different outbuildings were constructed, which are blown away by the same kind of zahist. One of the remaining developments was electric automatics.

This attachment is called automatic through those that are equipped with the function of vibrating life in automatic mode, when short flickers are caused, rewiring. Zvichayny zabіzhniki after spratsovuvannya pіdlyagayut zamenі new, and automatically after usunennya reasons for the accident can be re-enabled.

Such a zahisny attachment is necessary for any electrical circuit. Zahisny automatic machine to protect the alarm clocks or the application in case of various emergency situations:

• Fire.
• Hit people with a strum.
• Electrical wiring faults.

See that constructive features

It is necessary to know the information about the necessary information about the automatic switches, so that you can choose the right time for the bath right. Є classification of electric automatic machines according to the parameters.

Vimikayucha building

Tsya authority appoints a strum of a short zamikannya, when the automatic machine opens the lansy, they themselves turn on the leash and accessories, as if they were connected to the leash. For the sake of power, the following are automatically added:

• Automation for 4500 amperes will be installed to prevent malfunctions of the power lines of the residential houses in the old house.
• At 6000 amperes, vikoristovuyutsya to protect accidents when flickering in a row of budinkov in Novobudov.
• At 10,000 amperes, they are in the industry for the protection of electrical installations. A strum of this size can be found at the uninterrupted proximity to the substation.

The application of the automatic wimakach vinikay when fading, which accompanies the wiping of the singing size of the struma.

The machine protects the electrical wiring from poor insulation with a great strum.

Number of poles

It is up to the authorities to tell us about the maximum number of wires, which can be connected to a machine for safekeeping. In the event of an accident, the voltage at these poles is switched off.

Features of automatic machines with one pole

Such electric automatics are the simplest for their design, and serve for the protection of the neighboring villagers. Two darts can be brought to such an automatic vimikacha: enter and exit.

The supervisors of such outbuildings are the protection of electrical wiring in the form of rewiring and short circuit drotiv. The neutral wire is connected to the zero bus, bypassing the machine. Grounding is connected okremo.

Electrical automation with one pole is not incoming, so when it is switched on, the phase is opened, and the zero wire, as before, is left behind by the wire. Don't be 100% secure.

The power of automation from two poles

In case of an accident, if there is a need for more air in the electric line, the vicorist will automatically vimikachi from the two poles. The stench vikoristovuyutsya like entry. In emergency situations, or with a short flicker, all electrical wiring is switched on in one hour. It gives you the opportunity to carry out work for repairs and maintenance, as well as carrying out work for connection of the connection, the shards are guaranteed to be absolutely safe.

Two-pole electrical automatics will be switched off, if the presence of an okremyky vimikacha is required for an outbuilding, which works in the form of 220 volts.

The automatic machine from two poles is connected to the annex for additional chotiroh darts. Of these, two come from the lifeline, and the other two come out of it.

Tripolar electric automatic

In the electric circuit, which has three phases, there are 3-pole automatics. Groundings are unprotected, and phase conductors are connected by poles.

Tripolar automaton to serve as an entry point for any three-phase spozhivachіv navantage. Most often, such a variant of the automatic machine zastosovuyut at the industrial minds of living by the electrics of electric motors.

It is possible to connect 6 conductors to the machine, three of them are the phases of the electric line, and three wires that go out of the machine, and are secured with a zakhist.

Vykoristannya chotiripole automaton

In order to secure a three-phase circuit with a choti-ri-wire system of conductors (for example, an electric motor that is connected behind the “star” circuit), install a 4-pole automatic vimikach. Vіn plays the role of an introductory extension of the chotiripprovidnoi merezhi.

Possibility of connection to the building of eight conductors. From one side - three phases and zero, from the other side - out of three phases from zero.

Hour-strum characteristic

If an extension that saves electricity, that electric line works in the normal mode, it will start flowing through the stream. The cost of the electric machine. Ale, at the time of the increase in the strength of the struma from various reasons, it is higher than the nominal value, the spratsovuvannya of the opening of the automatic machine is required, and the lancet is opened.

The parameter of this specification is called the hour-stream characteristic of the electric machine. Vaughn є zalezhnistyu hour spratsyuvannya machine gun that spіvvіdshennya mіzh real power strum, scho to pass through the machine, that nominal value strum.

The importance of these characteristics is determined by the fact that the smallest number of pardons are taken care of from one side, and the protection of the strum is from the other side.

There are situations in the energy industry, if the short-term movement of the struma is not caused by an accident, and the defender is not guilty of spratsovuvat. The same applies to electric automatic machines.

The hour-strum's characteristics are determined, after which hour the spratsyuє zahist, and how the parameters of the strength of the strum when you blame it. The more vanity, the quicker the automatic machine.

Electrical automation with marking "B"

Automatic vimikachi category "B", zdatnі turn on for 5 - 20 s. At any value of the struma, set it to 3 to 5 nominal value of the struma 0.02 s. Such automatic devices are used for the protection of butt buildings, as well as the installation of electrical wiring in apartments and houses.

The power of automatic machines from marking "C"

Electric automatic machines of the category can turn off in an hour 1 - 10 s, at 5 - 10 times the jet force ≅0.02 s. These are located in rich areas, the most popular for houses, apartments and other accommodations.

Marking value "D" on automatic

With such a class, automatic victories are found in craftsmanship and vikonan in looking at 3-pole and 4-pole vikonan. Їх zastosovuyt in order to protect the exhausted electric motors and different three-phase outbuildings. Set the hour of the initial task to 10 seconds, with which the stream of task can exceed the nominal value by 14 times. Tse allows with the necessary effect to win yoga for the defense of different schemes.

Electric motors with significant pressure are most often connected through electric automatics with characteristic “D”, because the launch strum is high.

Nominal strum

Є 12 options for automatic control, yakі differ according to the characteristics of the nominal strum robot, from 1 to 63 amperes. This parameter determines the speed of the automatic machine when the boundary value of the stream is reached.

The machine, for the purpose of power, is selected with the improvement of the transverse cut of the conductors, which is allowed by the strum.

The principle of di ї electric automatic machines

Primary mode

With the primary robot of the machine, the control valve is important, the strum can be reached through the live wire to the upper terminal. They gave the strum go to a non-robust contact, through the new one to a ruhomy contact and along a flexible dart to the solenoid coil. After a new strum on the dart, I went to the bimetal plate of the rozchipluvach. From the new strum to pass to the lower terminal and further to the landing.

Advance mode

This mode is blamed for the transfer of the nominal stream of the machine. The bimetal plate is heated by a great strum, and that lance rises. For the plate, an hour is needed, which is to be deposited in the face of the significance of the stream, which is to pass.

Automatic mic switcher for analog attachments. When yogi is folded, there are singing folds. Strum spratsovuvannya rozchipluvach nalashtovuetsya at the factory with a special regulating screw. After reaching the plate, the machine can be repaired again. The temperature of the bi-metal plate is to lie down in Dovkil.

Rozchіpluvach dіє not vіrazu, giving mozhlivіst strumu vozrenennya nominal value. As the strum is not lowered, the spratsovu razchipluvach. Revantation can be connected through the tight extensions on the line, or connection to the row of extensions.

short circuit mode

In this mode, the strum grows more quickly. The magnetic field in the coil of the solenoid collapses the core, which leads to the opening of the rozchipluvach, which turns on the contacts of the measure of life, thereby knowing the emergency situation of the lancet and protecting the line in the event of a possible fire and destruction.

Electromagnetic rozchipluvach di mittevo, which is blown as a thermal rozchipluvach. When the contacts of the working lancer are opened, an electric arc is established, the value of which lies in the stream of the lancet. It's causing the disruption of contacts. In order to protect this negative force, the arc chamber is broken, as it is folded from parallel plates. Her arc fades and dies. Gazi, who blame, enter into a special opening.

The automatic vimikachi of the steady stream serve to turn on the lancet under the pressures. On traction substations, vimikaci should be stopped for turning on the lifeline lines 600 in case of shifting and short flickering jets and for turning on the turning jet at the rectifier units in case of turning lights or breakdown valves (i.e., short internal robotic flickering in parallel).

Extinguishing the electric arc by automatic fire extinguishers is carried out in the wind on the arc-extinguishing horns. The lowering of the arc can be wound behind the help of a magnetic vent, or in chambers with narrow slits.

In all fluctuations, when the lancet is turned on and the electric arc is established, the natural movement of the arc rises uphill at once from the heat heated by it, so that it is a heat blast.

On zastosovyvaetsya head rank shvidkodіyuchі avtomatichі vimikaі.

Rice. 1. Oscillograms of the struma and the voltage when the struma of a short flicker is switched on:

The last hour T, when the struma of a short chime is switched on, or the overwhelming of the vimic, is composed of three main parts (Fig. 1):

T \u003d t pro + t 1 + t 2

de t0-hour of growth of the struma in the lance, which is switched on to the value of the struma of the setting, then to the value, with any spratsovuє include the addition of vimikacha; t1 - the hour of switching on the vimikacha, i.e., the hour when the strum reaches the set point before the cob of the contacts of the vimikacha goes off; t2 is the hour of the arc.

The hour of growth of the strum in the lance t0 is deposited according to the parameters of the lance and the setting of the vimikacha.

The spring time of turning on t1 fall in the type of vimikacha: in non-vimikachs, the spring hour of turning on is in the range of 0.1-0.2 sec, in the wild-type - 0.0015-0.005 sec.

Hour of the arc fire t2 to deposit depending on the size of the struma, which is included, and the characteristics of the arc-extinguishing outbuildings of the vimikacha.

The last hour of turning on a non-widdy-coded vimikach is in the range of 0.15-0.3 s, a swedish-coded one - 0.01 - 0.03 s.

Zavdyaky to the small high hour, the inclusion of a swede-coded vimikach is between the maximum value of the struma of a short flicker in the lancet, which is protected.

At the traction substations, there are automatic codes for the stationary strum: VAB-2, AV-2/4, VAT-43, VAB-20, VAB-20M, VAB-28, VAB-36 and others.

Vimicach VAB-2є polarizable, so it reacts to the stream of only one directly - direct or reverse, fallow in vimikacha.

On fig. 2 indications of the electromagnetic mechanism of vimikach postiyny strum.

Rice. Fig. 2. Electromagnetic mechanism of VAB-2 vimikach: a - vimikach expansion, b - interboundary wear of VAB-2 vimikacha contacts, (A - minimum thickness of non-violent contact 6 mm, B - minimum thickness of rukoy contact 16 mm); 1 - adjusting coil, 2 - magnetic conductor, 3 - switching coil, 4 - magnetic yakir, 5 - upper steel beam, 6 - yakir, 7 - head yoke coil, 8 - calibration coil, 9 - P-similar magnetic conductor, 10 - strum visnovok, 11 - adjusting screw, 12 - shunting plate, 13 - knot of tie, 14 - emphasis, 15 - anchor weight, 16 - all anchor weight, 17 - non-ruhomy contact, 18 - ruhomy contact, 19 - contact value, 20 contact valve, 21 - all with a roller, 22 - stop valve, 23 - springs, which are switched on, 24 - thrust, 25 - adjusting screws, 26 - bracket, 27 - core of the damping coil

Anchor weight 15 (Fig. 2, a) wraps around axis 16, passed through the upper steel beam 5. , about how the contact value 19 wraps around the set of duralumin plates.

At the upper part of the contact veil of the reinforcements, the ruhomium contact 18, and below - the mid-length collar with a flexible tie 13, for the help of the rukhomy contact, it connects with the coil of the head stream 7 and through it with the introductions 10. To the lower part of the contact side attached stops 14 and from the right side - steel suspension with a roller 21, to which two springs are attached on one side, which are connected 23. On the other side, springs are included behind additional adjusting screws 25 fixed in a bracket 26, firmly installed on steel.

In the switched on position, the system of valves (anchor important and contact important) is turned by springs 23, which are switched on, around the axis 16 until the stop of the anchor 6 in the left shear of the P-like magnetic circuit.

Includes 3 and 1 Vimikacha cots for the life of the needs of the strumu.

To turn on the vimikacha, it is necessary to close the lancet of the coil 1, then - the lancet to turn on the coils 3. Directly, the struma in both coils can be such that the magnetic fluxes created by them are formed in the right core of the magnetic circuit 9, which serves as the core of the coil; then yakir 6 be attracted to the core, which turns on the coils, so that it leans in the “On” position. With this weight 20 at once with the contact valve 19 turn to the left, the springs 23, which turn on, stretch and will be able to turn the contact valve 19 around the axis 20.

If the vimic is turned on, the magnetic yakir 4 lies on the end of the core, which turns on the coils and when the vimika is turned on, it is attracted to the end of the core by a total magnetic flux, which turns on and removes the coil. Magnetic yakir 4 for additional traction 24 tie-downs with a stopper 22, which does not allow the contact valance to turn to the stop of the rumbly contact of the neruhomium. Therefore, there is a gap between the head contacts, which can be adjusted by changing the length of the thrust 24 and is guilty of adding 1.5-4 mm.

If you take the voltage off the coil, then turn it on, then the electromagnetic forces, which will reduce the yakir 4 in the attracted position, change the springs 23 for the help of the locking valve 22 and the thrust 24, turn the yakir into the end of the core, turning on the head of the coil and turn it. Also, the main contacts will be closed only after that, as soon as the cat's lancet is opened, which is turned on.

In this manner, the principle of free splitting is established in vimics VAB-2. The gap between the magnetic anchor 4 (now called the anchor of the free splitting) and the end of the core, which includes the coils at the switched on position of the vimikacha, is to blame buti in the boundaries of 1.5-4 mm.

The control circuit transfers the feed to the coil, which includes a short-hour pulse of the stream, the sufficiency of which is only enough to catch the switch from the “On” position. As soon as the lansy turns on, the coils will automatically turn on.

The presence of a free splitting can be turned over in such a way. Between the main contacts, switch the papriet and the contactor contact flicker. Vіdbuvaєtsya vіmknennya vimikacha, ale docks the contact of the contactor of short circuits, the main contacts are not guilty of closing and papirets can be vilno vinyat z promyzhku between contacts. If so, the papriets will be squeezed between contacts and it will not be possible to winnow.

When the vimikacha is turned on, there is a slightly characteristic underhand blow: the first one - in the form of an anchor and core, which turns on the coils, the other - in the form of a closing of the head contacts, which are closed.

The polarization of the vimikacha is polarized in the selection of a straight struma in the coil, which is subdued, in the fallow, the struma is directly in the coil of the head struma.

In order to turn on the lance, when changing the struma directly into it, directly the struma into the morning coil, they are selected in such a way that the magnetic fluxes, created by the coil, that the coil of the head stream, were switched on straight into the core, turning on the coils. Also, when the strum is pierced in a straight line, the strum of the head lancet accepts the vimikach in the turned on position.

In emergency mode, when you change the direction of the head stream on the turn, the magnetic flux, which is connected by the coil of the head stream in the core, including the coils, is changed directly, so that the magnetic flux of the coil of the head stream will be rectified against the magnetic flux turn on, turn on vimic. The speed code is important because at that hour, as the coil is turned on, the magnetic flux changes, in the core of the coil of the head stream, the magnetic flux increases.

In order to turn on the lance, when the jet is increased, and the jet of the setting is set to direct straight, select the jet straight into the coil in such a way that the magnetic flux of the coil in the core turns on the coils against the magnetic flow of the coil of the head jet when the jet does not flow directly through the direct jet. In this case, with the increase in the head struma, the demagnetization of the core is increased, which includes the coils and at the singing value of the head struma, which is more stable, or the strum of the set point is changed, the vibration becomes weaker.

The setting jet in both strokes is regulated by changing the size of the stream of the coil and changing the gap δ1.

The size of the struma of the coil is regulated by the change in the size of the additional support, which sequentially turns on the coil.

Changing the gap 1 changing the magnetic flux of the coil of the head jet. With a change in the gap δ1, the magnetic support changes, and, later, the size of the struma changes, which is included. Changing the gap δ1 is required for the additional adjustment screw 11.

The gap 2 between the stops 14 and the cheeks of the important anchor 15 at the switched on position of the vimikach characterizes the quality of the head contacts and is to blame buti in the boundaries of 2-5 mm. The plant produces vimikachi with a gap of δ2 equal to 4-5 mm. The value of the gap 2 is determined by the rotation of the contact valve 19 around the axis 20.

Vіdsutnіst gap δ2 (stops 14 sticking with the shocks of important anchors 15) to talk about the filthy contact or the presence of the contact between the head contacts. The gap δ2 is less than 2 or more than 5 mm to indicate that the main contacts stick more from the lower or upper edge. Gap δ2 may be small due to the great wear of contacts, as in this way they are replaced.

If there are sufficient contacts, then the regulation of the gap δ2 is carried out by the way of changing the entire mechanism, which is switched on along the vimikacha frame. To transfer the mechanism, two bolts are attached, which attach the mechanism to the frames.

Vіdstan m_zh head contacts in the included position may buti equal 18-22 mm. The pressure of head contacts for vimics on a nominal stream up to 2000 A inclusive can be in the range of 20-26 kg, and for vimics on a nominal stream of 3000 A - in the range of 26-30 kg.

On fig. Figure 2b shows a broken vimikacha system with indications of interboundary wear of contacts. Ruhomium contact is important if the diameter of B is less than 16 mm, and non-ruhomium contact - if the diameter is less than 6 mm.

On fig. 3 is given a scheme for managing the VAB-2 vimikachem. The circuit transfers the supply of a short-hour impulse to the coil, which is switched on, and does not allow the batonator to be switched on again when the button is pressed for a long time, which will cause the sound of “dzvіnkovostі” to start. Utrimuyucha cat constantly obtіkaetsya strum.

To turn on the vimikacha, press the “Uvіmk.” button, flashing the coil of the contactor and the blocking RB. When spratsovuє only a contactor, which closes the lance of the VK, which turns on the coils.

As soon as the loan is in the “On” position, the block contacts of the BA vimikacha will close, and the roaming contacts will open. One of the auxiliary contacts shunts the coil of the contactor K, which is the opening of the coil, which is switched on. In this case, the entire voltage will be added to the coil of the blocking relay RB, so, having spratsyuvavshi, shunt the coil of the contactor again with its contacts.

To re-notify the vimikach, you need to open the button of notification and close it again.

Discharge support CP, inclusions in parallel utrimu DK coil, serve to reduce the overvoltage when the coil lance is broken. The regulation of the opir of the CD ensures the possibility of changing the struma of the coil, which is eliminated.

The rated jet takes the coils at a pressure of 110 additional 0.5 A, and the rated jet includes the coils at the same voltage and parallel connection of both sections - 80 A.

Rice. 3. Electric circuit for controlling the VAB-2 vimikachem: Turn off. - switch-on button, DK - booster coil, SD - auxiliary opir, CP - discharge opir, BA-block-contacts of vimicach, LK, LZ - red and green signal lamps, Uvіmk. - on button, K - contactor and yoga contact, RB - blocking relay and yoga contact, VK - turn on the coil, AP - automatic changeover

Permissible voltage fluctuation of operational kіl vіd - 20% to + 10% vіd rated voltage.

The last hour of turning on the lancer with VAB-2 vimic becomes 0.02-0.04 sec.

Extinguishing of the arc during the opening of the lance with the help of the flame is blown out in the arc-extinguishing chamber for the help of the magnetic blast.

The coil of the magnetic blower is switched on sequentially with the head non-violent contact of the vimikach and with a coil of the head strum tire, in the middle of which there is a core, and a steel line. For the concentration of the magnetic field in the zone of the arc at the contacts of the core of the coil of the magnetic blower, the pole pieces may be used.

The arc extinguishing chamber (Fig. 4) is a flat box, lined with asbestos cement, in the middle of which two later partitions 4 are broken. The circuit rіg is electrically connected with a rough contact. The second rіg 7 reinforcements on indestructible contact. To ensure the smooth transition of the arc from the handy contact to the rіg, the horn to the contact is due to buti no more than 2-3 mm.

Vinykla when connected between contacts 2 and 6, the electric arc is driven by a strong magnetic field of the coil of a magnetic blower 5, it blows softly on the horns 1 and 7, leans in, cools down with a cold air flow and the walls of the chamber at the narrow slits of the walls. It is recommended to insert ceramic tiles into the chamber walls in the arc extinguishing zone.

Arc extinguishing chambers with a voltage of 1500 and more (Fig. 5) are installed in the chambers with a voltage of 600 with large overall dimensions and openings in the outer walls for the exit of gas and the addition of an additional magnetic blast.

Rice. 4. VAB-2 arc extinguishing chamber for a voltage of 600 V: 1 and 7 - horns, 2 - rough contact, 3 - external walls, 4 - later partitions, 5 - magnetic blower coil, 6 - non-rough contact

Rice. Fig. 5. VAB-2 arc extinguishing chamber for voltage 1500: a - chamber attachment, b - arc extinguishing circuit with additional magnetic blowers; 1 - handy contact, 2 - non-handy contact, 3 - magnetic blow coil, 4 - 8 - horns, 5 - 6 - additional horns, 7 - additional magnetic blow coil, I, II, III, IV - arc position in the extinguishing process

Attachment of the supplementary magnetic blower is two additional horns 5 and 6, between which the coil 7 is included. In all chambers, there are poles and metal linings.

For a fast and stable extinguishing of the arc, the contact spacing may not be less than 4-5 mm.

The body of vimikacha vykonaniya s non-magnetic material - silumin - and connections with a ruhomy contact, for this hour the work is interrupted under the full working voltage.

Vimikach automatic swedkod_yuchy post_y strum VAT-42

Operation of automatic vimics of a standing strum

In operation, it is necessary to follow the camp of the main contacts. The voltage drop between them at a nominal voltage may be in the range of 30 mV.

Cleaning of contacts in the oxide is carried out with a dart brush (brushing). With the appearance of inflows, they are taken off with a file, it is not possible to file off the contacts for the restoration of their primary flat form, so as to bring them to a dry wear.

It is necessary to periodically clean the walls of the arc-extinguishing chamber from mild and carbon deposits.

When revising the vimikach of a standing strum, re-check the insulation of the trim and include the coil along the extension to the body, as well as the support for the insulation of the walls of the arc extinguishing chamber. The insulation of the arc-extinguishing chamber is changed by a voltage supplement between the head ruhomim and non-violent contacts when the chamber is closed.

Before the introduction of the vimikacha into operation after the repair or the thriving safety, the chamber must be dried for 10-12 years at a temperature of 100-110 °.

After drying, the chamber is installed on the vimikach and it is built on the basis of isolation between two points of the chamber, spreading against the dry and unbreakable contacts, if the stench is broken. Tsey opir may buti not less than 20 mom.

Calibration of the settings of vimics is carried out in the laboratory with a strum, which is taken from a low-voltage generator with a rated voltage of 6-12 st.

At the substation, the calibration of vimikaci is carried out by a strum, or by an additional rheostat, at a nominal pressure of 600 st. There may be some recommendations on how to calibrate the vimikaciv of the standing strum for an additional calibrating coil with 300 turns of a PEL rod with a diameter of 0.6 mm, mounted on the core of the coil of the head struma. Passing a constant strum through the coil, for a number of ampere-winds at the moment the vimic is turned on, set the value of the strum setting. The first vikonann, which was released earlier, is replaced by another vikonann of the oil damper.