How to connect the self protection wire of the AC contactor

The A and B ends in the accompanying drawing are normally open contacts of AC contactors, when the start button is pressed (button 2 ends are turned on), the AC contactor is engaged, and the normally open contact is changed from open to closed (conduction), because the A and B2 ends are connected in parallel with the 2 ends of the button, and the effect of pressing and conducting the button is replaced at this time.

As we all know, the DC contactor is an indispensable electrical component in the circuit. So the question is, do you know how to wire the DC contactor? What are the application ranges of DC contactors? Next, let me give you a brief introduction to the relevant knowledge of DC contactors.

Since both heads are connected to the positive pole, you need one to be connected to the battery and the other to the controller. At this time, you need to connect the positive pole with the electric door lock, and the negative pole with the control or battery, so that the wiring is completed.

What is a DC Contactor.

DC contactors, using standardized modular design, using fewer spare parts for assembly, can be customized according to the different requirements of consumers, effectively saving energy. The DC contactor passes through the contacts to cut off the high voltage, and also uses the horizontal blowing magnetic field arc extinguishing for voltage conversion. At present, the product is widely used in industrial production, the energy is effectively controlled, and the internal coil is used to form a magnetic field under the influence of electric current, which drives the development and production of new products.

Application range of DC contactors.

1. Application in charging piles (machines).

At present, it is mainly used in DC charging piles, charging stations or on-board chargers. When the contactor is cut off, there is a connection effect between the charging pile and the car. When disconnected, it blocks the connection between the charging pile and the outside to play an effective protective effect.

2. Application in electric vehicles.

Of course, between the battery and the inverter, there is also a DC contactor. When the system stops running, there is a blocking effect, and when the system is running, there is a switching effect. Of course, when the vehicle is shut down or an obstacle occurs, the energy storage can be safely separated from the vehicle system, which has the effect of breaking the circuit.

In addition, in other auxiliary circuits, it plays the role of power control devices.

Summary: After reading the above introduction, I believe you have a further understanding of how to wire DC contactors. If you need to know more about it, please continue to ******, and more exciting content will be presented to you in the future.

If the contactor coil is 220V: A1 is connected to the live wire, A2 is connected to the neutral wire or A1 is connected to the neutral wire;

If the contactor coil is 380V: A1 and A2 are connected to different phase wires.

AC contactor is one of the commonly used electrical components in electrical control systems, and its role is to control the switch of the circuit. Due to the complexity of AC contactor wiring, it is necessary to master certain skills and methods. This article will introduce the wiring method and precautions of AC contactor in detail.

1. Types and uses of AC contactors.

AC contactors are mainly divided into two types: ordinary type and thermal relay type. The ordinary AC contactor is suitable for the control of AC circuit, and its maximum working voltage can reach 660V, and the maximum working current can reach 100A. The thermal relay type AC contactor is suitable for AC circuit control dissipation that requires overload protection, and its maximum working voltage can also reach 660V, and the maximum working current can reach 630A.

Second, the wiring method of AC contactor.

1. Wiring between the contactor and the power supply.

First, insert the contactor's power cord into the A1 and A2 terminals of the AC contactor. The A1 terminal needs to be connected to the phase wire of the power supply, and the A2 terminal needs to be connected to the neutral wire of the power supply. When wiring, it is necessary to pay attention to the safety of wiring after shooting, so as to avoid the occurrence of accidents such as electric shock or leakage.

2. Wiring of contactor and switch.

Next, the NO (normally open) terminal and NC (normally closed) terminal of the AC contactor are connected to the terminal blocks of the switch, respectively. In general, the NO terminal needs to be connected to the equipment to be controlled, and the NC terminal needs to be connected to the alarm device and other auxiliary equipment.

3. Wiring of contactor and relay.

In the control process, it is often necessary to use relays to control the start and stop of the AC contactor. In this case, it is necessary to connect the control terminal of the relay to the control terminal of the AC contactor. Usually, the control terminal needs to be connected to an external device such as a controller to achieve automatic control.

III. Precautions.

1. Before wiring, you should carefully read the wiring diagram and manual of the AC contactor to ensure that the wiring is correct.

2. When wiring, the power should be turned off first to avoid accidents such as electric shock or leakage.

3. During the wiring process, attention should be paid to the sequence and mode of wiring to ensure the normal operation of the contactor.

4. After the wiring is over, a test should be carried out to ensure the normal operation of the AC contactor.

AC contactor is one of the commonly used electrical components in the electrical control system, and its wiring method is more complex, requiring certain skills and methods. In the actual wiring process, it is necessary to pay attention to safety and correctness to ensure the normal operation of the AC contactor.

According to Qeeka Home experts, AC contactors are a very common equipment in the power system, which can quickly switch on and off large currents and play a role in protecting the safe operation of the line, but in real life, most owners do not know about contactors. So, how to wire the AC contactor? What are the contactor brands that are discredited by Zhibi?

Let's take a brief look at it together.

1. How to wire the AC contactor.

First, connect the main contact of the AC contactor with the electrical equipment, there are no special requirements for the sequential posture, but the inlet and outlet lines must be consistent; Then connect the auxiliary contact of the AC contactor 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.

2. What are the well-known contactor brands?

1. CHINT: The brand has been established for a long time, has been more than 30 years, has been set up in many cities in China, the enterprise is strong, the quality is guaranteed, the business scope involves a wide range, including high and low voltage electrical equipment, big data, new energy and so on.

2. Siemens: Founded in 1847, the brand is mainly responsible for the research and development and production of electronic and electrical engineering facilities, and successfully settled in China in 1872, after more than 140 years of unremitting development, it has won the favor and trust of many consumers.

3. ABB: The brand was formed by the merger of two different enterprises, so the business scope mainly involves two aspects, one is power equipment, such as air switches, low-voltage switchgear, etc., and the other is automation equipment, including motor transmission systems, automated robots, etc.

4. Schneider: The brand was founded in 1836, but China Schneider was established in 1987, and its business scope mainly includes power facilities, automation facilities and other infrastructure, after years of development, the company has more than 10,000 employees.

Summary: The above about how to wire AC contactors, the well-known brands of contactors are introduced here, I hope it will help you. If you want to know more about related information, please pay attention to Qeeka Home.

The steps are as follows: 1. First of all, the three-phase power supply is connected to the main contact L1, L2, L3 of the contactor respectively, and then three wires are connected to the three binding posts of the motor from T1, T2 and T3 of the contactor, and the above is the main circuit.

2. Control circuit: lead out a wire from L1 to connect the stop button (the stop button is normally closed, and the start button is normally open, this should be known!) From the stop button, connect the end of the start button and the end of the contactor auxiliary contact.

3. Then connect the other end of the auxiliary contact from the other end of the start button (this part is also self-locking), the wire from this end is connected to coil A1, and the coil A2 is connected to L2 or L3.

The exchange collapsed to pick up the group members and the bridge line.

There are two basic things for an AC contactor, the primary contact and the auxiliary contact. 2 4 The main contact, as the name suggests, is used to contact with electrical appliances, and the auxiliary contact is connected to the control loop and is used to control the main circuit. 3 4 The main contact is generally received by the main person on the way back to Wangxu, and as for the order, there is no special requirement.

4 4 auxiliary contacts connected to the control loop, generally to choose whether it is normally open contact, or normally closed contact, is according to the requirements of the control loop, you can add a mechanism at the top to trap and burn the number of contacts added.

1. First of all, observe that the AC contactor has 8 points, 3 inputs, 3 outputs, and two control points, and connect the wire from one terminal of the output point to the control point.

2. Then prepare three wires, and connect these three power wires from the L1, L2, and L3 terminals of the contactor respectively, and then connect them from the T1, T2, and T3 terminals, so that a main circuit is formed.

3. Next, a wire is drawn from L1 to be connected to one end of the contact, and then the other end of the good button is opened, and from this end, it is connected with coils A1, A2, L2 and L3.

4. Because there are different types of AC contactors with high lead, such as one is electromagnetic and another is vacuum, and the working principle of the two different models will be different.