How to connect the secondary circuit of the three AC contactors

There are two types of secondary circuit wiring of the three-way AC contactor:

First, the principle of AC contactor, the use of external power supply on the first ring, the electromagnetic field is generated, the power is attached, and the contact point is disconnected after the power is off. Therefore, the contacts of the external power supply are the two contacts that need to have coils. It is generally in the lower part of the contactor, and each is on one side.

The other outputs and inputs are generally in the upper part, which can be known by looking at the contactor. Note that the voltage of the applied power supply is 220V or 380V, and whether the contact points are normally closed or normally open.

Two- and three-phase contactors with eight points. Three inputs, three outputs, and the remaining two control points. Inputs and outputs are relative.

You can see it at a glance at this contactor. If there is a self-locking, you need to have an extra terminal at the output point to connect the wire to the control point of the contactor, and you can do it.

AC contactor connection method 1: Generally, there are 8 points in the three-phase contactor. Three inputs.

Three outputs. There are also two control points. Outputs and inputs correspond.

It's easy to see. If you want to add self-locking. It is also necessary to connect the wire from one of the terminals of the output point to the control point.

Electromagnetic fields are generated. Power-up pick-up. The contact points are disconnected when the power is off.

After knowing the principle. You should figure out the contacts of the external power supply. That is, the two contacts of the coil.

Generally in the lower part of the contactor. And each on one side. The other inputs and outputs are generally in the upper part.

Just look at it. Also pay attention to what the voltage of the external power supply is (220V or 380V).Generally marked as yes.

And pay attention to whether the contact point is normally closed or normally open. If there is a self-locking control. Just sort out the line according to the principle.

It depends on your circuit to determine how to connect it.

1. Dual power supply, the two contactor normally closed points (61-62) are actually mutual locking points, that is, the two contactors are not allowed to be suction at the same time, the KM162-61 normally closed point is the coil inlet of KM2, that is, if KM1 is engaged, the normally closed point will be changed to an open point, at this time, even if the A1 of KM2 is mistakenly on the point, KM2 will not be sucked, and the 13-14 points of the two contactors are self-protection points.

If you want KM1 to engage now, 2 points should be coiled into the line for power, and at the same time as pressing the button, KM2 will be energized at 61 points, and KM1 will be energized after the closed point KM-A1.

2. AC contactor.

The main contact of itself is the normally open contact, in addition there are normally open and normally closed auxiliary ridge Langling contact, the suction coil of the contactor is generally connected to the power supply of the control loop through the switch, when the switch is closed, the suction coil of the contactor is electrically engaged, and the original normally open main contact is closed and connected.

The main contact of the AC contactor itself is the normally open contact, in addition there are normally open and normally closed auxiliary contacts, the suction coil of the contactor is generally connected to the power supply of the control loop through the switch, when the switch is closed, the suction coil of the contactor is electrically engaged, and the original normally open main contact is closed and connected. The so-called normally open or normally closed refers to the state of the electrical contact in the case of power failure.

Summary. Second, the working principle of AC contactor.

It is to use an external power supply to add ** to the ring to generate an electromagnetic field. The contact point is disconnected when the power is off. Once you know the principle, you should figure out the contacts of the external power supply, that is, the two contacts of the coil, which are generally at the lower part of the contactor, and on each side.

The other inputs and outputs are generally in the upper part, and you can see it at a glance. Also pay attention to what the voltage of the external power supply is (220V or 380V), which is generally marked as having it. And pay attention to whether the contact point is normally closed or normally open.

If there is a self-locking control, it is enough to sort out the line according to the principle.

There are four open routes of how to connect the AC contactor.

Dear, we are inquiring about the relevant information for you, please wait for five minutes!

Dear, Xiaoying will inquire and understand the relevant information for you: the connection method of AC contactor L1 L2 5 L3 is connected to the power incoming line, T1 T2 T3 is used as the outgoing line to connect the electric load, and then A2 and 22NC are connected together with 21NC in parallel at both ends of the start button, and the other end of the coil A1 is connected to L3 (if the contactor coil voltage is 220V, the zero line), one end of the stop button is connected to L1, pay attention to the other end of the stop button and the start button end in series. Common AC contactor connections:

1. Generally, the three-phase contactor has a total of 8 points, three inputs, three outputs, and two control points. The output and input are corresponding, and it is easy to see. If you want to add self-locking, you also need to connect the wire from one of the terminals at the output point to the control point.

Once you know the principle, you should figure out the contacts of the external power supply, that is, the two contacts of the coil, which are generally at the lower part of the contactor, and on each side. The other inputs and outputs are generally in the upper part, and you can see it at a glance. Also pay attention to what the voltage of the external power supply is (220V or 380V), which is generally marked as having it.

And pay attention to whether the contact point is normally closed or normally open. If there is a self-locking control, it is enough to sort out the line according to the principle.

I hope mine is helpful to you, if you think the answer is good, you can give a like to encourage Xiaoying, thank you.

Summary. How to wire 2 AC contactors to achieve dual power switching?

This connection is the same, that's all, wiring.

Summary. 1. You can observe that the AC contactor has 8 points, 3 inputs, 3 outputs, and two control points, and the wire is connected from one terminal of the output point to the control point.

2. First prepare three wires, and connect these three power wires from L1, L2 and L3 terminals of the contactor respectively, and then connect them from T1, T2 and T3 terminals, so as to form a main circuit.

3. Next, a wire is drawn from L1, which is connected to one end of the contact, and then the other end of the button is started, which comes out from this end and is connected with coils A1, A2, L2 and L3.

AC contactor connection.

Hello, I have seen your question and am sorting out the answer, please wait a while

1. You can observe that the AC contactor has 8 points, 3 inputs, 3 outputs, and two control points, and the wire is connected from one terminal of the output point to the control point. 2. First prepare three wires, and connect these three power wires from L1, L2 and L3 terminals of the contactor respectively, and then connect them from T1, T2 and T3 terminals, so as to form a main circuit. 3. Next, a wire is drawn from L1, which is connected to one end of the contact, and then the other end of the button is started, which comes out from this end and is connected with coils A1, A2, L2 and L3.

The correct connection of the AC contactor is as follows:

The correct connection method of AC contactor is to connect the main contact of AC contactor with electrical equipment first, there is no special requirement for the sequence, but the inlet and outlet lines must be consistent, and then the auxiliary contact of AC contactor is connected with the control facility, pay attention to the normally open contact and normally closed contact, which must be determined according to the control switch circuit.

Contactors can also be used to control electrical loads such as plant equipment, electric heaters, machine tools and various power units. The contactor can not only turn on and off the circuit, but also work for low voltage release protection. Because of its large control capacity, the contactor is suitable for frequent operation and long-distance control.

What are the commonly used contactor models.

1. According to the number of poles of the main contact, it can be divided into single-pole, double-pole, three-pole, four-pole and five-pole contactors. Single-pole contactor is mainly used for single-phase load, such as lighting load, welding machine, etc., and can also be used in motor energy consumption braking, bipolar contactor is used in the rotor circuit of wound asynchronous motor, used for short-circuit starting winding when starting, and three-pole contactor is used for three-phase load burning.

2. According to the arc extinguishing medium, it can be divided into air contactor, vacuum contactor, etc. Contactors that rely on air insulation are used for general loads, while contactors that are insulated by vacuum are commonly used in coal mines, petroleum, chemical enterprises and some special occasions with voltages of 660V and 1140V. <>

3. According to whether there is contact or not, it can be divided into contact contactor and non-contact contactor. Most of the common contactors are contact contactors, while non-contact contactors are the products of electronic technology applications, and generally use thyristors as the on-off elements of the circuit.

Because the trigger voltage required for thyristor turn-on is small, and there is no spark generation when the circuit is turned on and off, it can be used in equipment with high operating frequency and flammable, explosive, and noise-free occasions.