How to use the contactor and what is the contactor connection?

The contactor is actually the switch of the closed circuit, the operation is convenient, simple and safe, there is the main contact L1L3L5 on the top for the near power, and the main contact L2L4L6 is the power output below, the auxiliary contacts on both sides are combined with the button to connect the coil of the contactor, and the coil drives the carrying iron to close the main electric original closed path after being energized.

The contactor is mainly used to control the main circuit, with large contact capacity, strong arc extinguishing ability, high operating frequency and long electrical life. Special attention should be paid to the coil voltage level when selecting the contactor. Then it's a matter of choosing the contact current according to your needs.

1. Contactors are divided into DC contactors and AC contactors (generally AC).

2 Contactors generally have 4 pairs of contacts (3 pairs of main contacts and 1 pair of auxiliary contacts) or 5 or 7 pairs of contacts (the main contacts are generally 3 pairs, and the auxiliary contacts may have 2 pairs or 4 pairs).

3. We often say that the contactor is normally open or normally closed, which refers to the original state of the contactor when it is not energized.

4. Take the "CHINT" contactor that we often use, such as the 2510 model, the contactor with the last 2 digits of 10 must have the words 13 and 14 on it, indicating that there is a pair of normally open auxiliary contacts.

5 Same as above, such as 2501 model, the last 2 digits are 01 contactors must have the words 21 and 22 on it, indicating that there is a pair of normally closed auxiliary contacts.

6. The terminal head of the control coil generally has 2 or 3, there are A1 and A2 or 2 A2, and 2 A2 are the same point, in order to facilitate the wiring from the top or from the bottom.

7. The control voltage is also 12V, 24V, 36V, 55V, 110V, 220V, 380V, etc.

8. Note that the contactor coil controlled by low voltage, such as 12V, cannot be connected to 24V or 36V or higher, which will burn the contactor.

9. Note that the contactor coil controlled by high voltage, such as 380V, cannot be connected to 220V or 110V or lower, and will not work normally.

10. If the contactor coil is 220V controlled, natural A1 and A2 are connected to one fire and one zero respectively.

Just connect in series. When the contactor coil is energized, the coil current will produce a magnetic field, and the generated magnetic field will make the static iron core produce electromagnetic attraction to attract the moving core, and drive the AC contactor point to act, the normally closed contact is disconnected, and the normally open contact is closed, and the two are linked. When the coil is de-energized, the electromagnetic attraction disappears, and the armature is released under the action of the release spring, which restores the contact, the normally open contact is disconnected, and the normally closed contact is closed.

The working principle of a DC contactor is somewhat similar to that of a temperature switch.

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The main incoming wire of the contactor is [1 L1 3 L2 5 L3], the main outlet wire is [2 T1 4 T2 6 T3], the auxiliary normally open contact is [14NO 13N0], and the auxiliary normally closed contact is [21NC 22NC]. 2. Access to the three-phase incoming contactor coil is 220V control. The label is [A1 A2] and picks up after power.

Use a screwdriver to unscrew the sail of the main control end shed, connect the three-phase inlet wire and tighten the screws. 3. Access the cable contactor, and the outlet end of the cable is connected to the cable in the same way. The contactor coil is connected to 220V electricity, and the cable color should be marked with different colors.

4. Auxiliary contact wiring: The auxiliary contact can be wired according to the requirements, such as chain collapse hail fruit contactor pick-up, and auxiliary normally open contact pick-up.

Pro, hello, the contactor is connected to the three-phase power supply, (the main circuit part is connected to the three-phase motor A1, A2 is the coil of the contactor, which is connected to the control orange brigade circuit, and the motor of the circuit part is controlled by controlling the coil of the contactor (A1, A2) to control the motor of the circuit part (to small control large means the auxiliary contact of this contactor, no means normally open, that is, it is disconnected when there is no power, and it is closed after power. The index is placed in the control circuit section with a self-lock (parallel connection in the pro, <>

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How to pick up the contactor Hello dear,!<

Contactor wiring methodContactor wiring method, contactor has two basic things, the main contact and the auxiliary head, the main contact is used to contact with electrical appliances or connected to the main circuit, and the auxiliary contact is connected to the control circuit, used to control the main circuit. Contactor wiring method, the main contact is generally connected to the main circuit, as for the sequence to the time there is no special requirement, the auxiliary contact is connected to the control circuit, generally to choose whether it is normally open contact or normally closed contact. This choice is based on the requirements of the control loop, generally if a normally open and normally closed contact is not enough for an AC contactor, take Schneider as an example, you can add a mechanism at the top.

Normally open, normally closed contacts are available. Contactor wiring method, the judgment of the contactor is that the normally open and normally closed can use the universal meter to break the range, when the universal meter measurement is loud to prove that it is normally closed contact, when the universal meter does not sound to prove that it is normally open contact, press the button of the auxiliary head with your hand will sound normally open, normally closed will not sound. How to use the contactor.

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 self-locking is to be added, it is necessary to connect the wire from one of the terminals at the output point to the control input 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.

The role of AC contactor: the breaking and control circuit of electric power.

In the circuit, it plays the role of turning on and off the power supply, and also has the effect of undervoltage release. When the circuit pressure is 0, it can control the large capacity, which is used to control the circuit, and the service life is relatively long, reducing the impact of the circuit on the entire power grid. AC contactors are used in electricity, and when the current is relatively large, it can also be allowed to pass through, so it actually has an overcurrent or protection function.

When thunder, if there is lightning in the wire, it can automatically cut off the power supply, so as to protect the electrical appliances in the home from damage, and the most direct manifestation is that there will be a problem of tripping.

Types of AC contactors

There are many types of AC contactors on the market, if divided according to its model, the main production of CJ10, CJ12, CJ20 and a series of products, the main feature of these products is normally open and normally closed. Some of the most commonly used electrical appliances in the home are the CZ0 series, and there are two types under it, one is single-stage, and the other is bipolar.

There is also a series of CJ12B-S, which is mainly used in three-phase circuits with a voltage of 380 volts, and the current can reach 600A, which can effectively protect the circuit in this distribution circuit, and there is not much noise when running, because it can eliminate word noise, so it is more reliable to use, and the installation is more convenient, and the most important thing is that the life is relatively long.