Scheme of starting the engine through the launcher. Magnetic launchers. Principle dії that circuit included.

Attachments, features (mainly their features) for automatic switching on and switching on of three-phase electric motors in the form of a rail, and also their reversal are called magnetic starters. As a rule, the stinks are used for turning by asynchronous electric motors with a voltage of up to 600 V. Starters can be reversible and not reversible. In addition, they often have a thermal relay for zahistu. electrical machines strum overwhelmed in trival mode.

Magnetic launchers can be issued from different viconannies:

• Reversible;
• Chi is not reversible;
• The protected type - they are installed in the occupants, where there is no great number of saws for the superfluous middle man;
• Pileneproniknі - are installed in places, de stinks will not be subjected to direct infusion of sun, plank, snow on them (when they are placed, they are rotting under a canopy);
• Vіdkritoy type - priznachenі for vstanovlennya in mіstsyah, vіd vіd vіd vіd vіd vіd vіdnі obіvіv i saw (shafi elektrichnі і іnshe obladnannya)

Attachment of magnetic launcher

Priestry magnetic launcher It's easy to drink. The wine is made up of the core, on which the coil, anchor, plastic case, mechanical indicators of inclusion, as well as the main and additional blocks - contacts are placed.

Let's take a look at the example below:

When voltage is applied to the coil of the launcher 2, the strum that flows into it, pulls the yakir 4 to the core 1, after which the power contacts 3 become muted, as well as the mic (or rozmikanny in the fallow vіd vikonannya) of the additional block of contacts, yakі in his line, signal to the management system about notification or violation of the annex. When the voltage is released from the coil of the magnetic starter, the contacts open to the winding spring, so that they turn around in their original position.

The principle of operation of reversible magnetic starters is the same, as if not reversible. Vіdminnіst polagaє in the next phases, yakі connect to the launcher (A - B - Z one attachment, C - B - A another attachment). Tsya umova is necessary for the reverse of the dvigun of the zminny strum. Also, when the magnetic starters are switched on reversibly, blocking of the one-hour humming of the outbuildings is transmitted, in order to avoid a short hum.

Schemes for switching on magnetic starters

One of the simplest magnetic starter connection schemes is shown below:

The principle of operation of the scheme is simple: when automatic vimicach QF selects the live coil circuit of the magnetic starter. Zapobіzhnik PU ensures the protection of the circuits for curing in case of short flickers. For normal minds, the contact of thermal relays P closes. Also, to start the asynchronous device, the “Start” button is pressed, the lantern is blinking, through the coil of the magnetic starter KM, the strum starts to flow, the core is drawn in, and the KM power contacts are blinking, as well as the block contact BK. The contact block BC is necessary for closing the control lane, the keys are pressed to let it go, turn around at the exit position. For the electric motor, it is enough to press the "Stop" button, in order to sort out the control scheme.

In the event of a turbulent streak, the thermal sensor P is used, which is the contact P, which is connected to the teeth of the machine.

When switching on the induced circuit, the next step is to change the voltage of the nominal coil. If the voltage of the coil is 220, and the engine (when plugged into the mirror) is 380, then qiu scheme It is not possible to beat, but it is possible to stop with a neutral conductor, and as the windings of the motor are connected with a tricooler (220 V), then the system is given as a whole life.

Scheme with a neutral conductor:

The only power of these circuits is connected, which in the first mode of life of the control system is connected to two phases, and in the other to the phase of the neutral conductor. In case of automatic activation by the start-up system, the replacement of the “Start” button can turn on the contact from the control system.

You can see how to connect a non-reversible magnetic trigger attachment here:

The reverse circuit is shown below:

Tsya folded scheme, lower when connected to a non-reversible extension. Let's look at the principle of robotics. When pushing the “Forward” button, all the descriptions are shown above, but, as you can see from the diagrams, the normally closed contact KM2 appears in front of the forward button. It is necessary for the electrical blocking of the one-hour warning of two outbuildings (a unique short flicker). When pressing the “Back” button for an hour, nothing will happen to the electric drive, the KM1 contact before the “Back” button will be opened. To reverse the machine, it is necessary to press the “Stop” button, and only after turning off one attachment, you can turn on the other.

І video of connection of reversible magnetic starting device:

When installing magnetic starters with thermal relays, it is necessary to install them with a minimum temperature difference dovkilla between an electric motor and a magnetic starter attachment.

Nebazhan installation magnetic attachments in the places of skhilnyh to strong shocks or vibrations, as well as orders from the tight electromagnetic devices, the stream of which to transfer 150 A, to that stench when spratsovuvanni create a great shock and blows.

For normal operation thermal relay the temperature of the superfluous middle is not guilty of exceeding 40 0 ​​C. It is also not recommended to install an order from heating elements(rheostati) and do not install them in the parts of the shafi, which heat up the most, for example, in the mountains of the shafi.

Ratio of magnetic and hybrid launchers:

In this article, you know what magnetic launchers are, look at the connection diagrams, and more importantly, look for attachments. Today, the industry has a wide-width electric motor with a short-circuit rotor (their part is about 95-96%). The stench itself works with the duet with magnetic launchers. In addition, launchers expand the capacity of the electric drive. Ale, about everything in order, a little bit of advice is needed for food about those for which purposes the stench is recognized.

Purpose of launchers

The connection scheme of a single-phase magnetic starter allows you to switch any kind of life. Zvichayno, as a new meal is prepared in the same phase. And to be more precise, the MP allows for remote control by an electric drive or other attachments. For example, a non-reversible building launcher is no longer carried out, or switching on a jumper in the field

But the axis of the reverse MP can not only be changed more robust. The stench of building change the connection of phases to the electric motor. And it means that the rotor is more likely to wrap around the gate directly. Management MP zdіysnyuєtsya for additional buttons:

• "Start";
• "Stop";
• "Reverse" (if necessary).

Moreover, these buttons can cause the voltage of life to be more than 24 volts. All management works itself out for help low voltage. And for the life of the cat, the electromagnet is no longer needed.

Types of magnetic starters

Magnetic starter, the connection scheme of which is induced in the article, but it can be broken in three vicons. To lay everything down in order for such minds to be exploited. So, vydkrite vykonannya puskachіv is recognized for installation in fixed viroblyaetsya on a DIN-rail. It goes without saying that the electrical panel is guilty of theft from third-party objects, for example, a saw or a rod.

Another type of corps is theft. Vіn hoch i appointments for installation in the middle of the application, and not shields, but all the same it is unacceptable to get on the new great number of saws, and even more so the rodin. It is also necessary to install magnetic starters, connection schemes for such induction at the state, in the minds increased water content, then it is more reasonable to vikoristovuvati pilovlagoneproniknі. True, they have є obezhennya - installation on the street is allowed, but it’s more than enough for the mind that you don’t use the light of that wood on the new one.

Design of magnetic starters

It is being built whether there is a 220V magnetic starter, the connection scheme of which is induced from one main part - the magnetic system. This coil, wound around a metal core, and a rickety yakir. Everything is in the case made of plastic. Ale is the base, yet it is impersonal dribnits, for example, a traverse, which is forged along straight axes. There is a yakir on it. In addition, blocking and head contacts have been made with her. The stench is equipped with springs, which help to rise at the time of switching on the life of the electromagnet.

Yak Pratsiuє launcher

Elementary physics is at the basis of MT robots. If you apply voltage to the winding, you will create a magnetic field near the core. As a result of which the rickety yakir begins to be attracted to the core. So pratsyuє whether it be a magnetic starter, the connection scheme can be reversed (deposit in the presence of a reverse). Before the speech, you can help and for the help of two great MPs. The launcher's contacts are normally open for locks.

If the yakir collapses to the point of being angry, the stench flickers. And yet another design, in which case the contact group is normally open for locking. And here the picture is opposite. Later, at the hour of the supply of voltage to the coil, the lance starts to flicker and the electric drive starts to work. But if you turn on the life of the cat, stop using the electromagnet. The ceremoniality of the return springs is swelled, as if the contact group was collapsing at the exit position.

Starter switching circuit

Take a look at the back of the varto, like a magnetic starter, the “reverse” connection scheme seems to be victorious. In fact, there are two identical outbuildings, united in one building. With this very success, as it was said earlier, you can win and simply MP, so that you know the switching circuit. The launchers have blocking, as if they are being used for the help of normally closed contacts. On the right, in what is unacceptable, so that the stench of insults turned on overnight. Otherwise the phases will start to flicker.

There is also a mechanical lock, which is installed at the launcher's body. Ale її it is possible not to vikoristati, as if it was overdone electric step Zahistu. The peculiarity of the design of the reverse is due to the fact that it is necessary to turn on the electric drive for life. For this backbone, it is necessary to turn on the electric motor. After that, it is necessary that the rotor be pinned on the wrapper. І less than once, it is allowed to turn on the engine at the gate. The pressure of the launcher is to blame, but the larger one, the lower one of the dvigun, as a result, there is an anti-switch or a galvanization.

thermal relay

And now let's look at a typical 380V magnetic starter. The connection scheme is not complete without an additional zahist. І such a thermal relay, as it is installed on the body of the launcher. The head of the thermal relay is to protect the temperature of the motor. The stench, obviously, will be present, but insignificant, overheating of the electric motor becomes impossible. As a thermal vanisher, the Zakhist, vtim, is similar to the design of an automatic vimikach.

A thermal relay, as it is installed on magnetic starters, allows small adjustments to be made. This is the name of the setting - adjusting the maximum value of the slowed down jet with an electric motor. As a rule, the cost of fixing is charged for additional twisting. The engine can groove under it, as well as graduating. The procedure is clumsy, it is enough to insert an arrow on a plastic disk in front of a similar mark to the values ​​of the boundary struma. Caution that thermal relays are not allowed to carry out protection against a short circuit. For whom wink

How launchers are mounted

Please note that the magnetic connection scheme allows for installation in the middle of electrical panels. Ale є vomogi to all designs of launchers. In order to ensure high reliability of functioning, it is necessary that only the installation was carried out on an ideally even and hard surface. Moreover, it can be vertically stashed. To hang out easier, then on the wall of the electrical panel. As a thermal relay in the design, it is necessary that the temperature difference between the MP and the electric motor is minimal.

To turn off the pardon of the launcher, or else it is unacceptable to carry out the installation of the outbuilding in places, like shocks, shaking, vibrations, postings. In addition, the installation on one panel with electric starters is fenced, so that a strum can be over 150 Amperes. If such devices turn on, they vimikayutsya, a sharp blow is heard. it is necessary to carry out correctly. With the method of shortening the contact and in order to prevent the distortion of the springy washers of the clamps, it is necessary to use viginati in the form of the stake or the letter “P”.

Launcher notice

Try to get the technology of electrical safety up to date, by no means work without turning on the power supply. If you have little information, then by hand, you can create a scheme. A photo of the connection of the magnetic launcher is shown in this article, you can check it out. What do vikonati need before launching the launcher? Naygolovnіshe - to conduct a visual look at the presence of cracks, distortions, phase transitions. Remember that it is necessary to turn on the whole lancer to the drive. Try to push your hands on the traverse, it is guilty of moving freely along the straight lines. Reverse it respectfully in the system all magnetic starters, wiring diagrams of power conductors.

Give respect to connecting the coil to the launcher's electromagnet. So zvіrtesya, scho vono є in the margins of an acceptable value. If you need 24 V, then serve the insoles. Turn over all the darts of keruvannya, chi stench with the buttons "Start", "Stop", "Reverse" (if necessary). Chi є on contacts rozchin for zmaschuvannya? If not, then apply yoga, otherwise blocking can be done immediately. After that, it is possible to switch on the lancet and start the drive. Give respect to those who have a coil of an electric magnet that can hum a little in this camp.

How to keep an eye on the launchers

Axis and everything, looked at the magnetic launchers, connection schemes, left guessing about watching them. Under the hour of operation, follow the step behind the camp of the magnetic launcher. The main work of sight is to avoid the saw ball, and there is more wood on the surface of the starter or the thermal relay. Sometimes it is necessary to tighten the contacts for connection to the gauge and to the drive. I drank, it was necessary to see either ganchir'yam, or stifled povitryam (only not watery). It is necessary to carry out cleaning of contacts, the shards are indicated on the resource of the accessory. For consumption, a replacement is carried out. The term of service is to lie down in the rich factors, but the most important - the whole mode of work. Like a launcher, it is constantly collapsing, vibrating commutation, and it won’t last long. The resource is reduced in the number of cycles of inclusion and inclusion, and not in the years of employment.

Reversing magnetic starter is locked for start-up asynchronous electric motor for two straight lines, wrapping - for the straight one and for the return one. Pro technical characteristics I recommend reading about those how the magnetic launcher works in ours.

Robotic principle

The reverse scheme is folded from two identical launchers. One of them, when turned on, starts the electric motor in one beat, and the other at the turn. In fact, it connects the same way as two singles. For the third time, there will be one “stop” button and two start buttons “Back” and “Forward”. And also zastosovuyutsya dodatkovo blocking: electrical and mechanical, in order to avoid the vindication of a short flicker or emergency situations with one-hour inclusion of two launchers.

Why winick KZ? In order to change the wrapping of an asynchronous electric motor on the length, it is necessary to remember two phases as missions. For example, on the first launcher, the phases are connected according to the density “A” - “B” - “C”, then on the other, you need to change the wrapping directly, you need to connect it according to the density “C” - “B” - “A”, or “B” - "A" - "C", or "A" - "C" - "B". Replacing two phases and another starter from the circuit is engaged. And it means that with a one-hour wimican, two will be between phases short chirp. In order to escape, behind the help of permanently closed contacts, when the magnetic starter is turned on, try to open the control lever of another or electrical blocking. Ale є th mechanical. The bottom line is that when one launcher is turned on, the other behind the help of a mechanical attachment is blocked.

Can you do it easier having bought in a collection in one metal or plastic case, a reversing starter with buttons. You will only need to connect the power supply to the thermal relay-cable to the electric motor.

Scheme of a reversible magnetic starter

Choose a scheme is not easy be independent of the greater number of people. It is your responsibility to ensure that mechanical blocking with your own hands does not require the installation of factory preparedness. In principle, it will be sufficient and correctly selected electrical blocking.

Let's take a closer look at the description of the circuit from the power unit. Three different phases come to the machine. Zhovta "A", green "B" and red "C". Let the stench go to the power contacts of two launchers from the designations KM1 and KM2. On the other side, there are 3 bridges between the central green phases and between yellow on the first and red on the other, and also between red on the first and on the other yellow.

Dali phase to go to the electric motor through a thermal relay, as strum control is less in 2 phases. In control, there is no need for tretin, because all three phases are closely related to each other. It seems simpler, the growth of the struma in one calls the same in another. Like a strum, which spozhivaetsya dvigun, growth for the safety of the borders, there is a roar of lances of liveliness, both cats in a row.

Scheme of keruvannya Vikonu function of switching on and off of power contacts KM1 and KM2. It consists of buttons, a block of contacts and coils, so that when a voltage is applied to it, it retracts the yakir, which locks the contacts. When switched on, KM1 and KM2 are roaring under the winding spring.

A circuit with a 380 Volt coil is described, as it is powered from 2 different phases. What is indicated on the hutch operating voltage 220 volts, then for the connection of the vikorist, be it one phase and zero.

Our type has one green phase through the contact of the thermal relay, which goes directly to the first contact and both coils.

Second phase on other contacts and go through the “Stop” button. І let the jumpers work on the permanently connected contacts of the “Forward” and “Back” buttons. In the same place, on the main launchers, the darts are connected to the open contacts at the closed mill-KM 1.3 and KM 2.3. And from the other side of the contact block, the wires are connected directly to the other contacts of the trigger buttons.

And in order to have an electrical blocking, it is necessary to wire the trigger buttons to the coil, not just connect them, but through the permanently closed contacts of another trigger.

When enabled Constantly rosemaries flicker, and constantly closed, they flicker. Previously, all contact blocks fought on the front side of the launcher. Today, for a permanently open circuit, quarters are charged with 3 power contacts. And for the permanently closed vicorist, there is a special prefix to the beast over the enforcers. An example in the image.

How to work the scheme

When pressing the "Forward" button spratsovuє kotka that turn on the power contacts. At the same time, the starting button is shunted, and the contacts of the KM 1.3 starter are permanently opened, which is why, when the button is released, the coil is shunted.

When the first starter is turned on, contacts KM 1.2 open, which cuts off coil K2. As a result, when you click on the "Back" button, nothing happens.

In order to turn on the engine at the gate you need to press "Stop" and increase K1. All contact blocks turn in the turn-around position, after which you can turn on the motor at the turn-around direction. Similarly, when K2 is switched on and the block is switched on by contacts, the possibility of switching on the coil of the other starter K1.

K2 include power contacts KM2, and K1-KM1.

Before the buttons to connect to the launcher, you need to lay five-wire cable.

Related materials:

Electric motors are more important for driving mechanisms and independent units. If you need a direct change of wrapping around the shaft, for launching a reverse starter, a connection scheme for some kind of object of professional training and simple inhabitants.

• • Functioning principle

How powerful and new is the launcher needed?

As it is possible to logically name the names of the purposes for starting electric motors of various drive mechanisms and equipment. This is a specific possession, as it is necessary for the commutation of power purposes with great ambitions, both on the permanent and on streak. The launcher can have more wide functionality, a lower basic contactor and a crim for the safety of partial starts and teeth, can act as a protection bar in case of shifting. Krym tsgogo, reversive and non-reversible launchers, for example, the PML series, know your skills when organizing remote control schemes, starting up pumping, ventilation, crane units, air conditioners, etc.

Any magnetic launcher is composed of the advancing main parts:

• Electromagnetic parts. It is made up of coils and pink magnetic conductors - an indestructible core and a fragile anchor;
• Block of main contacts. The stench is needed for the zamikannya / rozmikannya of the tight forceful tensions. With improved parameters, the launcher can accept up to 5 pairs of contacts. One half is stitched on the traverse of the anchor, and the other half is on the upper part of the hull;
• Blocking contacts. The stench vikoristovuyutsya when switching keruyuchih lansyugіv schemes, for example, if the included / zupinka v_dbuvaєtsya starter buttons. It is necessary to block the main contacts;
• Rotary mechanism. In fact, it’s just a spring, which, when the contacts are opened, turns the yakir at the exit position, ensuring the necessary clearance between pairs.

Retail between direct and reverse launchers

The main input of non-reversible and reversible launchers is similar to the connection scheme. The equipment is also changed. Contactor direct type It is single, but also reversible - blocky, which is made up of two straight lines combined in one body. The visual performance of these two relays can be matched to the PML-1100 (left-handed) and PML-1500 (right-handed) models:

When you can do it, one is extremely important mind: reversing the start of the launchers is guilty of turning on the possibility of their one-hour spratsovuvannya. Tse will inevitably lead to the vindication of the appearance of a short flicker.

The connection diagram of a reversible magnetic starter of an electric motor is divided into two main types:

1. Connected to the fence with a voltage of 220 V;
2. Starting the contactor at 380 st.

Type of operation of the reverse circuit for 220 V

On tsіy wiring diagram You can include the following basic elements (indicated by numbers):

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1. Blocking or block contacts;
2. Coils of magnetic starters, rozrahovani on the voltage of life 220;
3. Contacts of thermal chi strum zakhistu (relay elements);
4. Power contacts of launchers.

Krіm tsgogo, alphanumeric designations are seen:

• MP-1, MP-2 - magnetic launchers. Їхні interі on the diagram seen by dashed lines;
• Stop, Start - controls (the block itself is seen with a dashed line). Okremo saw only the Stop button. Start buttons (forward and reverse) are assigned as two pairs of contacts connected to MP-1 and MP-2 launchers;
• M - electric motor.

Functioning principle

As it is possible, on the power contacts of the starter, three different phases are connected to a 380 V line. There is a block connection by a path of a direct jumper of the central phases of the relay, as well as diagonal jumpers of the secondary phases (intelligently, 1 phase MP-1 connects with 3 phase MP-2, etc.).

After that, go to the electric motor M. At the next interval, a thermal relay is connected to the opening of the lance. There is a control of two of three phases, so that in case of revantation, turn on the life of the engine.

The control unit with start buttons is connected to one of the central phases at the opening of the thermal relay, that zero dart(grounded) type of coil. The protection of the one-hour activation of the starter is organized by a path of cross-connection of contacts in the start/reverse buttons with blocking contacts of the auxiliary contactor.

When the forward run control unit is turned on, the contacts to the first starter, which starts the engine, are switched on. At the same time, the contacts of the other launcher are switched off, and there is no voltage on the coil.

The reversal is increased after the engine teeth with the Stop button from the onset of the reverse move. In this rank, we can change the phases on the coils with the functions of the bichni phase, to bring the dvigun to the wrapping at the return bik. Blocking the first launcher follows a similar principle.

Type and function of the reverse circuit for 380 V

Here we may, in fact, these elements themselves, which are used for PML at 220 V, but the starter coils are more high voltage(mayut more turns). In addition, on the front view of the forward circuit, it is connected to the control unit not through one, but through two phases, not a vicarious zero.

Where are reverse launchers used?

The area of ​​stosuvannya podv_ynyh starting relays є dosit wide. Vaughn doesn't mix with electric motors. The need to change the wrapping directly, or the displacement of the drive mechanisms, may also be caused in other situations.

For example, a skin person can have a water supply system at home, singed, de є mіsce raznoї zapіrnoї fittings. For industrial scales, with high windage, diameters of pipelines, great accuracy in the control of windage, great cranes are not enough. Here there are electric streaks, as well as a mechanical system of turning by a working organ. The wrapping of the disk and the movement of the zasuvka are taken from different direct lines, also, the stoppage of the reverse circuits of the start-up is primed.

Not far away, you can find reversing starters of the PML type or other lift systems. The movement uphill and down is blown up behind the rahunok, change the wrapping of the head drum straight ahead.

Directly changing the wrapper of the dvigun, tying the vykonavchih mekhanizmiv from it - a procedure is required. When you eat three-phase mesh Vіdbuvaєtsya through promizhne komtuyuche relay - reversive magnetic starter type PML 1500 or else.

The magnetic starter is combined with a low-voltage electromechanical attachment, suitable for starting three-phase (as a rule) electric motors, for the safety of their uninterrupted work, for safe switching on of life, and sometimes for the protection of the lances of the electric motor and others. Deyakі puskachi mayut function reversuvannya dvigun, prote about everything in order.

In fact, - the price of additional adjustments, modifications, the contactor, the more compact, the lower contactor for the largest data, it is easier for the car, and the assignments to itself for robots with motors, so the launcher is directly recognized higher, lower for the contactor. Actual models of magnetic starters are optionally equipped with a thermal relay for emergency activation and a phase protection switch.

For keruvannya, the start of the dvigun, the path of switching the contact groups of the launcher, serve as a button or a low-current contact group with a coil on the line (12, 24, 36 or 380 volts) voltage, and sometimes - those and more.

At the magnetic starter, for switching the power contact groups, the coil itself on the steel core is used, until the yakir is attracted, which presses on the contact group, and in this way the power lantsyug blinks. When the coil is turned on, the spring moves the yakir at the turn position - the forceful lancer rises. Skin contact of the gaps at the arc extinguishing chamber.

Reversing and non-reversing magnetic starters

In principle, magnetic launchers are of two types: non-reversible and reversible. A reversing starter in one case has two magnetic starters, which can be electrically connected to each other, and fixed on a sleeping stand, however, it can be used, on the choice of an operator, only one of two of these starters, or the other one, or more.

The reversing starter is switched on through normally-closed blocking contacts, the function of these - turn off the one-hour inclusion of two groups of contacts - reversible and non-reversible, so that it does not happen interfacial mic. Deyakі models of reversing starters for the safety of this function can be mechanically protected. The first contactor oscillators are started up only by the call, that phase of life can be switched over by the call, so that the main function of the reversing starter is switched off - changing the direct wrapping of the electric motor. Changing the order of the phases - changing the direct wrapping of the rotor.

Possibility of magnetic starters

Vzagali, magnetic launchers of the building are rich in what. So, for the exchange of the starting stream of a three-phase electric motor, the windings of the coil can be switched with a “star”, then, if the motor is at nominal speed, it can be switched to a “trikutnik”. Under this circumstance, launchers can be critical and in case, irreversible and reverse, out of reverse direction and without reverse direction.

The leather magnetic starter can be used as a power, and blocking contacts. Forces without intermediary commute lanciug pushing desire, at that hour, as blocking is necessary for the robotic care of power contacts. Power and blocking contacts can be normally-open or normally-closed. On the principle diagrams Contacts are shown in the next normal state.

The stability of the stasis of reversing magnetic starters cannot be overestimated. Ce and operational treatment with triphasic asynchronous motors different layouts and pumps, control of ventilation, and control of shut-off valves, right up to locks and valves opal systems. Particularly noteworthy is the possibility of remote control by magnetic launchers, if the electronic unit remote care the low-current coils of the launchers are switched like a relay, and the stench, at their side, safely switches the power lancers.