Connection diagram for electromagnetic starter 380. Connection diagram for magnetic starter

Contactors or magnetic starters are used to supply power to motors or any other devices. Devices designed to be powered on and off frequently. The connection diagram for a magnetic starter for a single-phase and three-phase network will be discussed further.

Contactors and starters - what's the difference?

Both contactors and starters are designed to close/open contacts in electrical circuits, usually power ones. Both devices are assembled on the basis of an electromagnet and can operate in DC and AC circuits of different powers - from 10 V to 440 V DC and up to 600 V AC. Have:

• a certain number of working (power) contacts through which voltage is supplied to the connected load;
• a number of auxiliary contacts - for organizing signal circuits.

So what's the difference? What is the difference between contactors and starters? First of all, they differ in the degree of protection. Contactors have powerful arc extinguishing chambers. This leads to two other differences: due to the presence of arc arresters, contactors are large in size and weight, and are also used in circuits with high currents. For low currents - up to 10 A - only starters are produced. By the way, they are not produced for high currents.

There is one more design feature: the starters are produced in a plastic case, with only the contact pads exposed outside. Contactors, in most cases, do not have a housing, therefore they must be installed in protective housings or boxes that will protect against accidental contact with live parts, as well as from rain and dust.

In addition, there is some difference in purpose. The starters are designed to start asynchronous three-phase motors. Therefore, they have three pairs of power contacts - for connecting three phases, and one auxiliary one, through which power continues to flow to operate the engine after the “start” button is released. But since a similar operating algorithm is suitable for many devices, a wide variety of devices are connected through them - lighting circuits, various devices and devices.

Apparently because the “filling” and functions of both devices are almost the same, in many price lists the starters are called “small contactors”.

Design and principle of operation

To better understand the connection diagrams of a magnetic starter, you need to understand its structure and operating principle.

The base of the starter is a magnetic circuit and an inductor. The magnetic core consists of two parts - movable and stationary. They are made in the form of the letters “Ш” with their “legs” facing each other.

The lower part is fixed to the body and is stationary, the upper part is spring-loaded and can move freely. A coil is installed in the slot in the lower part of the magnetic circuit. Depending on how the coil is wound, the rating of the contactor changes. There are coils for 12 V, 24 V, 110 V, 220 V and 380 V. On the top of the magnetic circuit there are two groups of contacts - movable and fixed.

In the absence of power, the springs press out the upper part of the magnetic circuit, the contacts are in their original state. When voltage appears (press the start button, for example), the coil generates an electromagnetic field that attracts the upper part of the core. In this case, the contacts change their position (picture on the right).

When the voltage drops, the electromagnetic field also disappears, the springs push the moving part of the magnetic circuit up, and the contacts return to their original state. This is the principle of operation of an electromagnetic starter: when voltage is applied, the contacts close, and when voltage is lost, they open. Any voltage can be applied to the contacts and connected to them - either constant or alternating. It is important that its parameters are not greater than those declared by the manufacturer.

There is one more nuance: the starter contacts can be of two types: normally closed and normally open. Their operating principle is clear from the names. Normally closed contacts are switched off when triggered, while normally open contacts are closed. The second type is used to supply power; it is the most common.

Connection diagrams for a magnetic starter with a 220 V coil

Before we move on to the diagrams, let’s figure out what and how these devices can be connected. Most often, two buttons are required - “start” and “stop”. They can be made in separate housings, or they can be a single housing. This is the so-called push-button post.

Everything is clear with individual buttons - they have two contacts. One receives power, the other leaves it. There are two groups of contacts in the post - two for each button: two for start, two for stop, each group on its own side. There is also usually a ground terminal. Nothing complicated either.

Connecting a starter with a 220 V coil to the network

Actually, there are many options for connecting contactors; we will describe a few. The diagram for connecting a magnetic starter to a single-phase network is simpler, so let's start with it - it will be easier to understand further.

Power, in this case 220 V, is supplied to the coil terminals, which are designated A1 and A2. Both of these contacts are located at the top of the case (see photo).

If you connect a cord with a plug to these contacts (as in the photo), the device will be in operation after the plug is inserted into the socket. In this case, any voltage can be applied to the power contacts L1, L2, L3, and it can be removed when the starter is triggered from contacts T1, T2 and T3, respectively. For example, a constant voltage from a battery can be supplied to the inputs L1 and L2, which will power some device that will need to be connected to the outputs T1 and T2.

When connecting single-phase power to the coil, it does not matter which output is supplied with zero and which with phase. You can switch the wires. Even most often, the phase is supplied to A2, since for convenience this contact is located on the bottom side of the housing. And in some cases it is more convenient to use it and connect the “zero” to A1.

But, as you understand, this scheme for connecting a magnetic starter is not particularly convenient - you can also supply conductors directly from the power source by building in a regular switch. But there are much more interesting options. For example, you can supply power to the coil through a time relay or light sensor, and connect a power line to the contacts. In this case, the phase is connected to contact L1, and zero can be taken by connecting to the corresponding coil output connector (in the photo above it is A2).

Diagram with start and stop buttons

Magnetic starters are most often installed to turn on an electric motor. It is more convenient to work in this mode if there are “start” and “stop” buttons. They are connected in series to the phase supply circuit to the output of the magnetic coil. In this case, the diagram looks like the figure below. note that

But with this method of switching on, the starter will operate only as long as the “start” button is held down, and this is not what is required for long-term operation of the engine. Therefore, a so-called self-catching circuit is added to the circuit. It is implemented using auxiliary contacts on the starter NO 13 and NO 14, which are connected in parallel with the start button.

In this case, after the START button returns to its original state, power continues to flow through these closed contacts, since the magnet has already been attracted. And power is supplied until the circuit is broken by pressing the “stop” key or by triggering a thermal relay, if there is one in the circuit.

Power for the motor or any other load (phase from 220 V) is supplied to any of the contacts marked with the letter L, and is removed from the contact marked T located underneath it.

It is shown in detail in what order it is better to connect the wires in the following video. The whole difference is that not two separate buttons are used, but a push-button post or push-button station. Instead of a voltmeter, you can connect a motor, pump, lighting, or any device that operates on a 220 V network.

Connecting a 380 V asynchronous motor via a starter with a 220 V coil

This circuit differs only in that three phases are connected to contacts L1, L2, L3 and three phases also go to the load. One of the phases is energized to the starter coil - contacts A1 or A2. In the figure this is phase B, but most often it is phase C as it is less loaded. The second contact is connected to the neutral wire. A jumper is also installed to maintain power supply to the coil after the START button is released.

As you can see, the scheme has remained virtually unchanged. Only it added a thermal relay that will protect the engine from overheating. The assembly procedure is in the next video. Only the assembly of the contact group differs - all three phases are connected.

Reversible circuit for connecting an electric motor through starters

In some cases, it is necessary to ensure that the motor rotates in both directions. For example, for the operation of a winch, in some other cases. A change in the direction of rotation occurs due to phase reversal - when connecting one of the starters, two phases must be swapped (for example, phases B and C). The circuit consists of two identical starters and a button block, which includes a common “Stop” button and two “Back” and “Forward” buttons.

To increase safety, a thermal relay has been added, through which two phases pass, the third is supplied directly, since protection in two is more than enough.

Starters can be with a 380 V or 220 V coil (indicated in the specifications on the cover). If it is 220 V, one of the phases (any) is supplied to the coil contacts, and “zero” from the panel is supplied to the second. If the coil is 380 V, any two phases are supplied to it.

Also note that the wire from the power button (right or left) is not fed directly to the coil, but through the permanently closed contacts of another starter. Contacts KM1 and KM2 are shown next to the starter coil. This creates an electrical interlock that prevents two contactors from being supplied with power at the same time.

Since not all starters have normally closed contacts, you can take them by installing an additional block with contacts, which is also called a contact attachment. This attachment snaps into special holders; its contact groups work together with the groups of the main body.

The following video shows a diagram of connecting a magnetic starter with reverse on an old stand using old equipment, but the general procedure is clear.

A magnetic starter is a special installation that is used to remotely start and control the operation of an asynchronous electric motor. This device is characterized by a simple design, which allows the connection to be made by a technician without relevant experience.

Carrying out preparatory work

Before connecting the thermal relay and the magnetic section, you must remember that you are working with an electrical device. That is why, in order to protect yourself from electric shock, you need to de-energize the area and check it. For this purpose, most often, a special indicator screwdriver is used.

The next stage of preparatory work is to determine the operating voltage of the coil. Depending on the manufacturer of the device, you can see the indicators on the body or on the reel itself.

Important! The operating voltage of the coil can be 220 or 380 Volts. If you have the first indicator, you need to know that phase and zero are supplied to its contacts. In the second case, this means the presence of two opposite phases.

The stage of correctly identifying the coil is quite important when connecting a magnetic starter. Otherwise, it may burn out while the device is operating.

To connect this equipment you must use two buttons:

• start;
• stop.

The first of them can be black or green. This button is characterized by permanently open contacts. The second button is red and has permanently closed contacts.

When connecting a thermal relay, it is necessary to remember that the phases are switched on and off using power contacts. The zeros that approach and depart, as well as the conductors that ground, must be connected to each other in the terminal block area. In this case, the starter must be removed. These devices are not switched.

In order to connect a coil whose operating voltage is 220 Volts, you need to take a zero from the terminal block and connect it to the circuit that is intended for the operation of the starter.

Features of connecting magnetic starters

The magnetic starter circuit is characterized by the presence of:

• three pairs of contacts, through which power is supplied to electrical equipment;
• Control circuit, which includes a coil, additional contacts and buttons. With the help of additional contacts, the operability of the coil is supported, as well as the blocking of erroneous activations.

Attention. The most commonly used circuit is one that requires the use of one starter. This is explained by its simplicity, which allows even an inexperienced master to cope with it.

To assemble a magnetic starter, you need to use a three-core cable that is connected to the buttons, as well as one pair of contacts that are well open.

When using a 220 Volt coil, it is necessary to connect red or black wires. When using a 380 Volt coil, an opposite phase is used. The fourth free pair in this circuit is used as a block contact. Three pairs of power contacts are connected along with this free pair. All conductors are located at the top. If there are two additional conductors, they are placed on the side.

The power contacts of the starter are characterized by the presence of three phases. To turn them on when you press the Start button, you need to apply voltage to the coil. This will allow the circuit to close. To open the circuit it is necessary to disconnect the coil. To assemble the control circuit, the green phase is directly connected to the coil.

Important. In this case, it is necessary to connect the wire that comes from the coil contact to the Start button. A jumper is also made from it, which goes to the closed contact of the Stop button.

The magnetic starter is turned on using the Start button, which closes the circuit, and turned off using the Stop button, which opens the circuit.

Features of connecting a thermal relay

A thermal relay is located between the magnetic starter and the electric motor. Its connection is made to the output of the magnetic starter. Electric current passes through this device. The thermal relay is characterized by the presence of additional contacts. They must be connected in series with the starter coil.

To start devices at a certain distance, a reversible or non-reversible electromagnetic starter PMA, PME 221 and PM is used; we suggest considering the principle of operation, design, and how to connect the device to an electric motor, as well as the characteristics of the device.

Types of starters and technical characteristics

Magnetic thermal relay starters can be classified according to several parameters:

• degree of protection from exposure to harmful environmental factors (electromagnetic explosion-proof starter in a housing, open type device);
• presence or absence of control buttons;
• operating principle (reverse or without reverse, with thermal relay).

Let's look at the starters by design. Two separate contactors mounted on a common panel or on a DIN rail or other base are an electromagnetic reversing starter (Allen-Bradley, abb - ABB, cjx, dil, KMI, dilm, fuji, siemens, KME and lc1). An electrical circuit of zero protection is provided here, the operating system is described below. Reversing contactors can also be equipped with a mechanical interlock, which prevents two contactors from being switched on at the same time.

Diagram: three-phase motor starter

Reversible or thyristor electromagnetic contactless starter (PAE, pbr, pvi, Siemens, pm12 and 22 m, telemecanique, ukhl and uv) are applicable in control circuits for asynchronous motors VAZ, TU. The most common are three-pole contactors, equipped with 6 thyristors, two per pole. The device is controlled by two buttons: “Start”, “Start”.

Magnetic starter circuit

Magnetic starters equipped with thermal relays (nc, inom) are very common. These devices are characterized by smooth adjustment and increased safety. They are used in car engines where long-term short circuits are possible; these mechanisms will not help against short surges.

Operating principle and scope

As soon as the three-phase contactor turns on, the coil begins to pass through itself. Subsequently, the core begins to magnetize and attract the armature to itself, because of this the main contacts are washed out among themselves, and current flows through the device circuit. But as soon as a voltage drop occurs (or a corresponding signal is received), these contacts will open and the power will stop.

Most electromagnetic starters (in particular, automatic single-phase devices) open all contacts during voltage surges (I mean both main and auxiliary). The main advantage of having such a mechanism is that when the power is turned on again, the operation of the device will not resume; in order to restart the starter, you must press the “Start” button (green). We also recommend periodically checking the operation of the device if voltage drops of up to 50% occur.

Video: example of connecting an electromagnetic starter to a circuit

Why do you need a contactor? The simplest example of a contactor application is in manufacturing. Let's say the voltage drops at the plant and the machine stops. The master working behind it will decide to see if something has gotten into the working unit or the spindle is clogged. But as soon as the voltage becomes normal again, the machine (if there is no magnetic starter) will start working. The result may be injury or even death. Exactly the same application applies to a pump, a car or even an airplane.

Connection diagram of the starter to an asynchronous motor

The connection diagram, in which an electromagnetic starter (type PML, series 3220, 2120, 2232, 1511, 2100, 2230, 1100, 3500, 1561, 3210 and 1100) is connected to an asynchronous motor, has the following description: initially you need to briefly press the “start” button "or "start", this is done so that the anchor is attracted and the main contacts are closed. In addition to the main terminals, auxiliary terminals will also be switched on, thereby creating a parallel type of connection with contacts. Now we release the button, and the non-reversible starter switches on self-locking, providing zero protection for the engine. Then press the “stop” button and connect the device to the engine according to the diagram (photo below).

Diagram: connecting an irreversible starter

When connecting a reversing contactor to an asynchronous motor, you must proceed with caution, because connecting two circuit starters at the same time will result in a short circuit. In this case, one switch works as “stop”, and the other as “start”. The principle given above is suitable for connecting equipment with reverse, but it is necessary to take into account the moment of double blocking and the type of starter.

Diagram: connecting a reversing starter

Tips from an electrician when connecting a magnetic starter:

• starters with thermal relays are not installed in areas with high vibration or subject to shock (except for automotive devices, say moeller);
• the rated current must be within the permissible limits of the contactor (the ampere level will be indicated by the catalog or instructions for the devices);
• limit the contact of the electromagnetic starter (only an explosion-proof contactor is allowed - ip from 20 to 54) and warm air, this will negatively affect its operation. If the contactor was installed for an asynchronous motor, then place a rheostat near it;
• when connecting the contactor to the motor, more precisely to its contacts and clamps, it is necessary that the end of the conductor be in the shape of a ring or U-shaped;
• the copper ends, which will also be connected, need to be tinned;
• Under no circumstances use several buttons at the same time in reversing devices;
• if aluminum ends are connected, it is necessary to lubricate them with technical petroleum jelly;
• Do not apply lubricant to the moving parts of the starter unless required by the installation of other devices.

Selecting an electromagnetic starter

To choose the right electromagnetic starter, you need to consider the following points:

1. What series of devices (miner, reversible, non-contact) and GOST. A passport or information sheet will help in determining this indicator;
2. Compare the required and permissible values ​​of volts, kW, Hz and amperes A in some cases, pa) of the device. Much depends on the magnitude of these indicators, as well as on the build quality of the electromagnetic reversing and non-reversing starter;
3. Compare the dimensions of the device and its installation area;
4. Last but not least is cost;
5. The degree of protection of the device (this indicator is especially important for hazardous industries);
6. Also be sure to check the sample certificate of conformity; it indicates the presence of additional functions and mechanisms.

You can buy an electromagnetic starter in all major cities: Kharkov, Chelyabinsk, Tomsk, Tver, Moscow, Yekaterinburg, but the price will be much lower in cities where there is a specialized manufacturing plant; it is advisable to choose such localities.

Any electrical device has a device for connecting it to the electrical network, be it a kettle, coffee grinder or a more complex mechanism. This can be either a simple device or a more complex one. Sometimes, if it fails, you need to replace it or assemble it yourself for an electrical appliance.

Connection methods

What might be the difficulty of connecting? It is necessary to ensure the safety of users from electric shock or fire, and the safety of the device itself from complete or significant damage if it malfunctions. According to the principles used in these devices, they can be divided into:

• electronic;
• electromechanical.

Electronic devices consist entirely of devices that do not use mechanical, muscular force. They use transistors and thyristors for switching. Such devices are fully automated. They are fast and noise-free. They do not produce sparks or electric arcs. They are significantly smaller in size electromechanical. They also win in weight and, importantly, in price.

However, electromechanical devices are still widely used. Perhaps their only advantage is their comparative simplicity. If they are classified according to the disconnected current, then three groups can be distinguished:

• relay;
• starters;
• contactors.

Via relay

Relays are the lowest-power ones and operate with low current and voltage. In this regard, they can operate at relatively higher frequencies than the other two. They are used in automation, telephony, and for low-power units. They can be used as a main switch or in conjunction with a more powerful one, for example, a starter.

The relay has a metal or plastic case and a dielectric plate from which leads emerge for attaching wires. The coil and contacts are attached to the plate. By the number of contacts we can distinguish:

• single-contact;
• a lot of contact.

The coil is a wire wound around a frame, and in the center there is a metal core. Near the core there is a metal plate, to which one or more contacts are attached through an insulating gasket. In some designs there may be 20−30. When current passes through the coil, the core is magnetized and attracts the plate with the switching device. In order for the commutator to return to its original position after removing the voltage from the coil winding, a spring is attached to it on the opposite side.

Those switching devices that are in motion are called mobile. Others are stationary, they do not move while the relay is operating. For every moving contact there are one or two fixed contacts. In this regard, they can be divided into three groups:

• closing;
• opening;
• switching.

Closing contacts are a pair of contacts that close when the coil is activated. The opening circuits will naturally open when voltage is applied to the coil. In switching devices, the movable commutator is located between two fixed ones, and in the absence of a magnetic field, the movable ones are connected to one contact, and when a magnetic field appears, they switch to another.

Usually there is a relay housing contact diagram, which shows in what position the movable ones are located in the absence of voltage on the coil. They are numbered, just like the pins on the case, which helps determine which pin corresponds to which pin. The coil terminals are shown separately; they are designated by the letters “A” and “B”.

On the electrical diagram, the relay is indicated by a rectangle, and the letter K is placed next to it. If there are several relays in the circuit, a number is placed next to the letter - an index. The rectangle itself represents the winding of the coil. To make the circuit easier to read, the contacts can be located separately from the relay. For identification, the letter “K” and numbers (index) are placed next to them, indicating their belonging to a particular relay. If the relay has several pairs of contacts, their serial number is indicated in the index.

Magnetic starters are widely used in everyday life and production. It is used to connect consumers of various capacities. The housing, made of electrical insulating material, completely protects a person from accidental electric shock.

A coil with a core is attached inside the housing. It is connected, you need to pay special attention to this, to a voltage of 220 or 380 volts. Failure to comply with this requirement will result in either poor starter operation or coil failure. The rated voltage is indicated on the coil itself, and it is placed in such a way that this inscription could be seen without disassembling the housing.

As in a relay, the core winding forms an electromagnet, but of much higher power. This allows you to increase the opening speed of the switching device by increasing the elasticity of the spring, which, in turn, makes it possible connect significant currents to the circuit.

Due to the release of large currents, an electric arc occurs. It is dangerous because it can block adjacent switching devices, which will lead to a short circuit. The chain breaking time also increases. The contacts themselves begin to melt and burn out under the influence of high temperatures. The resistance in them increases, which can adversely affect the operation of the electrical appliance. The worst thing, perhaps, is when the switching devices stick together, or even become completely welded, then the circuit cannot open. The consequences are easy to predict.

There are several ways to combat this undesirable phenomenon:

When using a capacitor, it is necessary to select a capacitance of such a value that it matches the inductance of the load. If the capacitance is small, sparks will appear between the contacts, and if the capacitance is large, the sine will shift along the time scale, and in the worst case, the tops will be cut off. In simple terms, the current will be rectified, and this will affect the operation of electrical appliances.

A resistor eliminates this problem, but adds its own. If the resistance is low and the contacts are open, current will flow through the starter. This will result in a loss of energy and may pose a danger to people in, for example, damp areas. If the resistance is high, an arc may occur again.

Using a contactor

The contactor is similar to magnetic switch, but operates with significantly higher currents. It must have an arc-extinguishing chamber and is characterized by fast response. Unlike a magnetic starter, it does not have current protection. Some devices have not one, but two electromagnets. The main, powerful one is used to close the contacts, and less power is used to hold the contacts.

Features of connecting a three-phase motor

At home, sometimes it becomes necessary to connect a three-phase motor through a magnetic starter. What should you pay attention to? Magnetic starters have current protection. It is a bimetallic plate through which current passes. When heated, the plate changes shape, this is used to close or open control contacts.

There are external contacts on the starter body, which are also used in the control circuit. There are usually two pairs of them, some making, the other breaking.

The main contacts of the starter directly connect the motor to a three-phase network. Structurally, two phases already pass through bimetallic plates, which, if necessary, break the power circuit of the starter coil.

The second end of the coil goes in two directions:

• to normally open contacts on the housing;
• to the "start" button.

After which the circuit is reunited and goes to the “Off” button. Then it is connected to phase or zero, depending on the type of coil.

If it is necessary for the engine to operate in two directions, install a second starter according to the same scheme and with its own control buttons. The difference will be in the phasing. This can be done experimentally. The engine starts through one starter, turns off, starts through another. If rotation occurs in the same direction, any two phases on the starter are swapped.

During operation, malfunctions may occur due to wear or external factors:

1. When the starter is turned on, the contacts begin to rattle or do not turn on.
2. When disconnected, they stick and sparks appear between the contacts.

What could be the reason in the first case? When replacing the coil, we chose a higher value. It was set at 220 V, but they set it to 380. If they didn’t change it, short-circuited turns appeared in the coil, and the magnetic field decreased. The coil needs to be replaced. When the starter was completely disassembled, a more powerful spring was installed on the contacts.

In the second case, either the contacts are damaged or the load is too heavy. It is necessary to check the consumer current and the starter rating. If they match, change the contacts.

The times when switching of three-phase asynchronous electric motors was carried out using manual switches are long gone. They were replaced by more advanced devices - magnetic starters.

This device allows you to remotely control the working processes of electrical equipment, ensuring a high level of electrical safety.

Recently, starters are increasingly used for remote control of powerful consumers of electricity: compressor units, pumps, air conditioning, ventilation systems, etc. One of the new applications is implementation in lighting and alarm control systems.

Structurally, modern magnetic starters consist of two parts:

1. A permanently fixed lower part and a contact block that moves along skids.
2. There are 4 contacts on the top of the device - 2 normally closed and 2 normally open.

The basis of any magnetic starter is a magnetic circuit and an inductor.

When voltage is turned on to the coil of the magnetic starter, the armature is instantly attracted to the core, thereby closing the power and auxiliary contacts, which send a signal to the control system to start or turn off the device.

By means of a return spring, when the voltage is removed from the coil, all contacts open (return to their original position). Starters can be used on both direct and alternating voltage. The most important thing is that it does not exceed the parameters recommended by the manufacturer.

The classic version of connecting a magnetic starter involves the use of two control buttons: the “Start” button and the “Stop” button, which are sequentially connected to the phase supply circuit to the magnetic coil connector. They can be placed either in separate housings or in a common housing (the so-called push-button post or push-button station).

This is what the simplest connection diagram looks like:

As can be seen from the connection diagram of the magnetic starter buttons, when the “Start” button is closed (pressed), the circuit is closed, as a result of which current begins to flow through the coil, drawing in the core and thereby closing the power and auxiliary contacts.

To stop the controlled device or equipment, simply press the “Stop” button, which will open the circuit. Both buttons have a similar structure and differ only in that in the initial position the Start button is always in the open state.

Connect a magnetic starter with buttons Controlling Start and Stop with your own hands is quite simple. Now we'll tell you how to do this.

VIDEO REVIEW

Instructions - connecting a magnetic starter via a button

Let's look at the procedure for connecting a magnetic starter using the example of lighting control - turning on/off a regular lamp.

To do this you will need the following tools, devices and materials:

• magnetic switch;
• magnetic starter power button Start (it can be of two types - green or black);
• Stop button (red);
• installation box for buttons;
• two-core copper wire;
• socket with lamp;
• side cutters, knife, Phillips screwdriver.

To connect a push-button switch circuit, you need to do the following:

1. From the “plus” power is supplied to the Stop button and from it a wire is output to the power contact of our magnetic starter;
2. The output from the Stop button goes to the Start button and from it a “plus” is output to the auxiliary contact of the device, designated as 1L1;
3. The second output from the Start button goes to the base contact of the starter A1;
4. A jumper is connected to A1 from the 2T1 contact socket. This is necessary so that after releasing the “Start” button, the circuit does not open, and the phase continues to flow to the coil of the magnetic starter and self-holding is triggered when the start button is pressed once. Otherwise, for the device to operate, you will have to constantly keep the start button pressed;
5. The negative wire goes straight to connector A2, as well as to 5L3;
6. The controlled electrical device itself (in our case, a lamp) is connected to connectors 4T2 and 6L3.

VIDEO INSTRUCTION