Contactor

What is Contactor

The contactor is composed of contacts, coils and other accessories. It can operate the opening and closing state of the contacts by controlling the current in the circuit, thereby achieving on-off control of the circuit. Contactors are usually installed in switchboards or control cabinets as one of the main switching devices in power systems for remote control and automation control. In specific applications, contactors can be selected and configured according to different load and control requirements. For example, AC contactors and DC contactors are suitable for different circuit types, while large, medium and small contactors are suitable for different loads and control needs.

Why Choose Us

Quality Assurance

We ensure that all production processes are carried out in accordance with the ISO9001 system, and all products have passed CE certification, and some products have also passed UL and VDE certification.

High-Quality Products

The company is committed to producing high-quality products that meet customer's standards. The company uses advanced technology and equipment to ensure consistency in the quality of its products.

High Productivity

We have our own standard factory buildings and warehousing centers, which can supply electrical products in large quantities and independently complete all work from raw materials, product production, assembly to packaging.

24H Online Service

Our company advocates the corporate development strategy of "quality, integrity, innovation and enterprising". Here, customers' needs will be responded to positively and customer problems will be solved as soon as possible. What you gain is not only high-quality products, but also services.

Advantages of Contactor

High control accuracy

The contactor can accurately control the on-off state of the circuit, thereby achieving precise control effects.

Simple operation

The operation of the contactor is very simple and can be operated by manual or automatic control, which is convenient and fast.

High reliability

The contactor has undergone strict quality control and durability testing, and has high reliability and long service life.

Good safety

The contactor has functions such as overload protection and short circuit protection, which can effectively protect the circuit and load and avoid damage to the equipment due to overcurrent or short circuit.

Strong adaptability

Contactors can adapt to different circuit types and load control requirements, making it convenient for users to select and configure.

Good economy

The manufacturing cost of contactors is low, the price is relatively affordable, and the maintenance and replacement costs are also low.

Common Types of Contactor

AC contactor

Suitable for AC power supply, mainly used to control the start, stop, forward and reverse rotation of the motor.

DC contactor

Suitable for DC power supply, mainly used to control the start, stop, forward and reverse rotation of DC motors.

Thermal Relay

Thermal relay is a device that uses the thermal effect principle of current to protect electrical appliances. When the current in the circuit exceeds a certain value, the bimetallic sheet inside the thermal relay will bend, thus disconnecting the circuit.

Magnetic contactor

Magnetic contactor is a contactor that uses the principle of magnetic field to control the opening and closing of circuits. It is characterized by simple structure, small size and easy operation.

Time relay

A time relay is a device that can automatically connect or disconnect a circuit according to a predetermined time. It is often used in situations where delay control is required.

Solid-state relay

A solid-state relay is a contactor that uses semiconductor devices to achieve circuit on-off control. It is characterized by fast working speed, long life, and high reliability.

Operation Details about Contactor

1. Checking the contactor regularly to ensure it is in good condition and free from damage or defects.
2. Confirming the power supply to the contactor is properly connected and the voltage is within the specified range.
3. Testing the contactor by operation to ensure it functions normally and there are no issues with the control circuit or mechanical parts.
4. Keeping the contactor clean and free from dust or debris to ensure good contact and reliable operation.
5. Handling the contactor carefully to avoid dropping or impact that could damage the device.
6. Using appropriate tools and handling techniques to install, remove, or repair the contactor to avoid causing damage or injury.
7. Following the manufacturer's instructions and guidelines for operation, installation, and maintenance of the contactor.
8. Keeping records of operation, maintenance, and repair of the contactor to track its performance and reliability.

Working Principle of Contactor

The working principle of a contactor involves the use of electromagnetic principles to control the opening and closing of a high-voltage electrical circuit. When the contactor is in the closed position, the main contacts are in contact with each other, allowing current to flow through the circuit. When the contactor is in the open position, the main contacts are separated, breaking the circuit and stopping the flow of current.

In a contactor, there is a solenoid coil that surrounds a fixed iron core and a movable armature that is attracted to the fixed iron core when an electrical current is passed through the coil. This attraction force causes the movable armature to move towards the fixed iron core, either closing or opening the main contacts depending on the position of the contacts before the current was applied.

When the contacts are closed, the current flowing through the solenoid coil creates a magnetic field that attracts the core and armature. This attractive force creates a push that closes the core and armature together, causing the contacts to come into contact. At this point, current can flow through the contacts, forming a complete circuit.

When it is necessary to open the circuit, the current supply to the coil can be cut off, and the magnetic field lines disappear, causing the thrust between the core and armature to disappear. At this time, the elastic force of the spring pulls the iron core and the armature apart, causing the contacts to separate, the circuit is disconnected, and the current stops flowing.

In addition, in order to prevent arc burning of contacts, arc extinguishing devices are also widely used in contactors. Common arc extinguishing devices include magnetic blow arc extinguishing devices and grid arc extinguishing devices.

Maintenance Tips for Contactor

Appearance inspection: Check the appearance of the contactor regularly to see if there is any obvious damage, deformation, rust or oxidation. These damages may indicate that the contactor has been damaged to a certain extent, or that its service life is approaching or has been exceeded.

Resistance test: Use a multimeter or LCR meter to test the resistance of the contactor. If the resistance value deviates greatly from the standard value, it means that the contactor may be seriously damaged and cannot work properly and needs to be replaced.

Connectivity test: Use the power supply to energize the contactor to test whether it can work normally. If there is no response when power is turned on, or the temperature inside the contactor rises abnormally after power is turned on, it means that the life of the contactor is close to or has reached its limit and needs to be replaced.

Arc extinguishing test: Use a high-speed camera to photograph the interior of the contactor when it is running, observe the shape and size of the arc, and record the arc extinguishing time. If the arc extinguishing time is long, or the arc is prone to instability, it means that the contactor is greatly worn and its life has expired or is about to expire.

Auxiliary contact inspection: Check whether the auxiliary contacts are burned and whether the transmission part is damaged. The action of the auxiliary contact should be flexible, the contact stroke should meet the specified value, and the contact should not be loose or fall off.

Cleaning and maintenance: Regularly clean the dust on the outside of the contactor, especially between the moving parts and the core suction contact surface. Check the tightness of the iron core. Loose iron core will cause increased operating noise. If the core short-circuit ring falls off or breaks, it must be repaired in time.

Check fasteners: Check whether each fastener is loose, especially the conductor connection part to prevent heating due to loose contact.

Check the contact wear: Check the wear degree of the contact, the wear depth shall not exceed 1mm. If the contacts are burned or fall off after welding, they must be replaced in time; if the contacts are slightly burned, it generally does not affect the use. Sandpaper is not allowed when cleaning contacts; a shaping file should be used.

Check the insulation resistance: measure the phase-to-phase insulation resistance, the resistance value should not be less than 10MΩ.

What you should know when use Contactor?

Load control: Contactors are mainly used to control various loads, such as motors, electric heaters, capacitor banks, etc. When using a contactor, it needs to be selected and configured according to the characteristics and needs of the load to ensure that the contactor can work properly and ensure the safety of the circuit.

Operation mode: The contactor operation mode includes manual and automatic. When operating manually, attention needs to be paid to the operating strength and direction to avoid damaging the mechanical structure of the contactor. During automatic control, reasonable configuration is required according to the control logic to ensure that the contactor can respond to the control signal correctly.

Control power supply: The control power supply of the contactor needs to be selected according to the requirements of the circuit. Usually, the control power supply of the contactor is DC or AC power supply, which needs to be configured according to actual needs. At the same time, you need to pay attention to the voltage and current values of the power supply to ensure that the contactor can work properly.

Installation environment: The installation environment of the contactor needs to be dry, well-ventilated, and free of flammable and explosive items. During the installation process, it is necessary to pay attention to the installation position and direction of the contactor to ensure that it can work properly and ensure safety.

Maintenance: Contactors require regular maintenance, including cleaning contacts, checking whether the mechanical structure is loose or damaged, and replacing worn parts. At the same time, it is necessary to pay attention to the maintenance cycle and method to avoid improper maintenance that affects the performance and service life of the contactor.

What are Features of Contactor？

Control large-capacity circuits: Contactors are mainly used to control the starting and stopping of large-capacity motors and can carry large currents and voltages.

Electrical interlocking and mechanical interlocking: Contactors usually have electrical interlocking and mechanical interlocking functions to ensure safe and reliable operation. Electrical interlocking realizes the mutual restriction of various electrical appliances through the control of circuits, while mechanical interlocking realizes the connection and restriction between various electrical appliances through mechanical structure.

Protection function: Contactors usually have functions such as overload protection, phase loss protection and undervoltage protection, which can protect the safety of circuits and equipment.

Simple operation: The operating mechanism of the contactor is simple and easy to understand, and it is easy to realize automatic control and manual control.

Strong adaptability: The contactor can adapt to various working environments and conditions, such as high temperature, low temperature, humidity, vibration, etc.

Long life and high reliability: The contactor uses high-quality contacts and materials, which has a long service life and high reliability, and can ensure long-term and stable work.

Diverse specifications and models: In order to meet the needs of different applications, the specifications and models of contactors are very diverse, and users can choose according to actual needs.

What are the Main Parts of Contactor？

Electromagnetic system: This consists of a coil (electromagnetic winding) that surrounds a movable iron core (armature). When electricity flows through the coil, it creates a magnetic field that attracts the armature. The armature is attached to a shaft, which in turn moves the contacts.

Contact system: This is the part of the contactor that carries the current. It consists of fixed contacts and moving contacts. The fixed contacts are attached to the stationary part of the contactor, while the moving contacts are attached to the armature and move when the armature moves.

Operating mechanism: This mechanism converts the electromagnetic force generated by the coil into mechanical motion that opens and closes the contacts. It also provides the necessary force to maintain the contacts in their closed position.

Arc chute: This is a device that helps extinguish the arc formed when the contacts open. It consists of a series of metal plates that help dissipate the heat and extinguish the arc.

Housing: The housing serves as the contactor's enclosure and provides protection for the internal components. It is usually made of insulating material to prevent shorts or other electrical hazards.

What is Contactor Used for?

1. Control the switch of the circuit: The contactor can control the switch of the circuit by controlling the on and off of the electromagnet to realize the start and stop control of electrical equipment.
2. Protect electrical equipment: The contactor has functions such as overload protection and short-circuit protection. It can cut off the power supply in time when overcurrent or short-circuit occurs in the electrical equipment to protect the electrical equipment from damage.
3. Segmented control: Contactors can divide the circuit into several segments, and realize segmented control of electrical equipment through segmented control, which helps to improve the operating efficiency and safety of electrical equipment.
4. Remote control: The contactor can be used in conjunction with the remote control system to remotely control the on-off status of the contactor to achieve remote control of electrical equipment and improve the automation and intelligence level of electrical equipment.
5. Control of high-power loads: Contactors usually have higher rated current and rated voltage capabilities, can withstand larger loads, and can be used to control high-power loads, such as motors, air conditioners, lighting equipment, etc.

Factors to Consider When Selecting Contactor

01/

Voltage rating: Ensure the contactor is rated for the voltage required by the application. Check the voltage rating on the contactor and compare it with the voltage of the circuit it will be used in.

02/

Amperage rating: The amperage rating of the contactor should be sufficient to handle the load it will control. Select a contactor with an amperage rating that is higher than or equal to the load's current draw.

03/

Contact material: The contact material of the contactor should be suitable for the type of current it will carry and the environment in which it will be used. Common contact materials include silver, silver alloy, and copper alloy.

04/

Mounting options: Consider the mounting options of the contactor. Some contactors are surface mount, while others require through-hole mounting. Determine if the contactor will be mounted on a printed circuit board or a chassis and choose accordingly.

05/

Actuation options: The contactor may have different actuation options, such as momentary or latching. Momentary contactors require a continuous input signal to maintain the contacts in the closed position, while latching contactors will remain closed until a specific input signal is applied. Select the appropriate actuation option based on your application's requirements.

06/

Enclosure type: The enclosure type of the contactor should match the environment in which it will be used. Choose an enclosure that provides protection from moisture, dust, and other environmental factors that could compromise the contactor's performance or reliability.

07/

Lifetime and reliability: Consider the lifetime and reliability of the contactor. Some contactors are designed for high-cycle duty, while others are rated for lower cycle counts. Determine if the contactor has a longevity that meets your application's needs and if it has a reputation for reliability in its field of use.

08/

Cost: The cost of the contactor should be balanced with its performance and reliability. Do not sacrifice quality for price; instead, seek out contactors that offer good value for your application's needs.

09/

Availability: Ensure the contactor you choose is readily available and supported by a reliable supplier. This will help ensure timely replacements and technical support are available if needed.

10/

Compatibility: Check if the contactor is compatible with other components in your system, such as relays or circuit breakers. Choose a contactor that will integrate smoothly with your existing equipment to minimize issues during installation and operation.

What Is the Manufacturing Process of Contactor?

1. Raw material preparation: According to the design requirements of the contactor, prepare the required raw materials, such as copper, iron, insulating materials, etc.
2. Parts processing: Processing and manufacturing of parts required for contactors, such as contacts, coils, brackets, etc.
3. Assembly and debugging: Assemble the processed parts and conduct electrical and mechanical debugging to ensure that the contactor can work normally.
4. Inspection and testing: Inspection and testing of the assembled contactor, including electrical performance testing, mechanical performance testing and environmental adaptability testing, etc., to ensure that it meets the design requirements and safety standards.
5. Packaging and finished product storage: Qualified contactors need to be packaged and stored in the finished product warehouse, waiting for sales and shipment.

What Are the Storage Requirements for Contactor?

Ambient Temperature: Contactors should be stored within the temperature range of -5℃ to +40℃ to avoid equipment damage caused by overheating or overcooling.

Humidity: The contactor should be stored in an environment with a relative humidity not exceeding 70% to prevent the equipment from getting damp or rusting.

Avoid direct sunlight: Contactors should be stored out of direct sunlight to prevent ultraviolet rays from causing damage to the equipment.

No corrosive gas: The contactor should be stored in an environment free of corrosive gas and dust to maintain the performance of the equipment and extend its service life.

Regular Inspection and Maintenance: During storage, the contactor should be regularly inspected and maintained to ensure its performance and reliability.

Packaging intact: Contactors should be kept intact during storage and transportation to prevent damage and dust from entering.

Follow Manufacturer’s Instructions: When storing contacts, the instructions provided by the manufacturer should be followed to ensure proper storage and protection of the equipment.

How to Control the Quality of Contactor During the Manufacturing Process?

Design review: Carefully review the design of the contactor to ensure it meets the desired electrical and mechanical specifications. Identify any potential issues or weak points early in the design phase.

Inspection of raw materials: Ensure that the raw materials used in the manufacturing process meet the specified quality standards. This includes materials for the housing, contacts, coil, and other components.

Production processes: Implement standardized production processes that ensure consistent quality. Train employees on proper manufacturing techniques, and provide regular refresher training to maintain a high level of skill.

In-process inspections: Conduct regular inspections during the manufacturing process to identify any potential defects or deviations from specifications. These inspections should include checks of the assembly process, soldering, and other critical operations.

End-of-line testing: Perform thorough testing on completed contactors to verify their performance and reliability. This includes tests for electrical specifications, mechanical strength, and reliability under various conditions.

Statistical process control (SPC): Implement SPC techniques to monitor and control the manufacturing process. Use control charts to track key process parameters and identify any potential outliers or deviations from target values.

Audits and reviews: Regularly conduct audits of the manufacturing process to ensure that quality standards are being met. Review production records, inspection findings, and customer feedback to identify any potential areas for improvement.

Preventive maintenance: Implement a program of preventive maintenance to ensure that production equipment remains in good working order. Schedule regular maintenance checks and replace worn or broken parts before they become a problem.

Continuous improvement: Embrace a culture of continuous improvement by constantly looking for ways to improve the manufacturing process, reduce defects, and enhance product quality. Use feedback from employees, customers, and quality inspectors to identify areas that need improvement.

How to Evaluate the Performance of Contactor?

1. Contact resistance: Contact resistance is an important indicator to measure the conductive performance between contactor contacts. A high-quality contactor should have a small contact resistance to ensure that less heat is generated when current passes, thereby reducing the risk of energy loss and equipment damage.

2. Insulation resistance: Insulation resistance is an important indicator to measure the insulation performance of a contactor. The greater the insulation resistance of the contactor, the better its insulation performance, which can ensure the safe operation of the equipment.

3. Contact load capacity: Contact load capacity is an important indicator of the contactor's ability to withstand load. When selecting a contactor, a contactor with sufficient load capacity should be selected based on the size and nature of the actual load to ensure that the equipment can operate normally.

4. Contact life: Contact life is an important indicator of the reliability and durability of the contactor. A high-quality contactor should have a long contact life and be able to ensure long-term stable operation of the equipment.

5. Action time and recovery time: Action time and recovery time are important indicators to measure the dynamic characteristics of the contactor. A high-quality contactor should have fast action time and recovery time, ensuring fast response and efficient operation of the equipment.

6. Environmental adaptability: The contactor should be able to operate stably under different environmental conditions, such as temperature, humidity, vibration, etc. Therefore, when evaluating contactor performance, its adaptability and reliability under various environmental conditions need to be considered.

7. Safety: The contactor should have good safety performance, such as overload protection, short-circuit protection, etc., to ensure the safety of equipment and personnel.

What Are the Special Requirements for Packaging Materials for Contactor?

1. Protection performance: The packaging material must be able to protect the contactor from the influence of the external environment, such as moisture, dust, vibration, etc. Therefore, the packaging material should have certain moisture-proof, waterproof, dust-proof and other properties to ensure the safety of the contactor during storage and transportation.
2. Impact resistance: Since the contactor may be subject to vibration, collision, etc. during transportation, the packaging material should have certain impact resistance to prevent the contactor from being damaged during transportation.
3. Anti-seismic performance: Contactors may be subject to varying degrees of vibration during transportation and storage, so the packaging material should have certain anti-seismic properties to reduce the impact of vibration on the contactor.
4. Environmental protection requirements: With the improvement of environmental awareness, more and more companies are beginning to pay attention to the environmental performance of products. Therefore, packaging materials should be recyclable, degradable, and environmentally friendly to reduce environmental pollution.
5. Beautiful and elegant: Packaging materials should have good printing performance and be able to print exquisite patterns and text to increase the added value and aesthetics of the product.

How to Test the Durability of Contactor?

1. Specifications review

Familiarize yourself with the contactor's specifications and datasheet, including rated voltage, current, duty cycle, and other relevant parameters. This information will guide the testing process and ensure accurate results.

2. Test setup

Set up a test environment that replicates the conditions under which the contactor will be used. This may include simulating high and low temperatures, moisture exposure, vibration, and other relevant environmental factors.

3. Test procedures

Operate the contactor under normal conditions to assess its performance and reliability over time. Monitor any changes in contact resistance, operational speed, and noise levels.
b. Endurance testing: Subject the contactor to repeated operation cycles to simulate long-term use. Monitor the contactor's performance and any signs of wear or failure.
c. Temperature testing: Expose the contactor to extreme temperatures (both high and low) to assess its thermal stability and performance across different temperatures.
d. Vibration testing: Apply vibration to the contactor to simulate harsh environments and operational conditions. Evaluate any loosening of components or changes in performance.
e. Moisture resistance testing: Expose the contactor to moisture (such as water spray or high humidity) to assess its ability to withstand moisture-related stressors.

4. Test duration

Determine the duration of each test based on the contactor's expected lifespan and the severity of conditions being simulated. Longer durations may be necessary for more rigorous tests or to ensure meaningful results.

5. Data collection

Collect and record detailed data throughout the testing process, including any observed failures, operational issues, or other significant events. This information will aid in assessing the contactor's durability and reliability.

6. Analysis and evaluation

After testing is complete, analyze the data collected and evaluate the contactor's performance under various conditions. Compare the results with the manufacturer's specifications and datasheet to assess compliance and durability.

7. Reporting

Prepare a detailed report summarizing the testing procedures, results, and any observations or recommendations for improvement. This report can serve as a valuable reference for future product development or for customers seeking durability information about the contactor.

How to Prevent Mold from Contactor?

1. Keep a Dry Environment: Store the contactor in a dry environment away from moisture and moisture to prevent rust.
2. Regular Inspection and Maintenance: Regularly check the appearance and performance of the contactor to detect and handle any abnormalities in a timely manner. Oil or rust-proof the metal parts of the contactor to extend its service life.
3. Select high-quality materials: Choose contactors made of high-quality materials with anti-rust functions to improve their corrosion resistance.
4. Follow manufacturer's instructions: When using and storing contactors, the instructions provided by the manufacturer should be followed to ensure the proper use and protection of the device.
5. Cleaning and Dust Removal: Clean the surface and metal parts of the contactor regularly to remove any dirt and dust. Use a soft cloth and mild detergent to clean, avoiding harsh chemicals.
6. Ventilation and drainage: Maintain good ventilation and drainage system to prevent the contactor from being in a humid environment for a long time.
7. Storage in a cool and dark place: Store the contactor in a cool, dry, well-ventilated place without direct sunlight. Avoid prolonged exposure to high temperature and high humidity.

How to improve the production efficiency of Contactor?

1. Optimize the production process: Conduct a comprehensive review of the production process to identify and eliminate unnecessary steps and repetitive work. Through reasonable arrangement of production plans, ensure the smooth operation of the production line and avoid pauses and waiting during the production process.

2. Introduce automation and intelligent equipment: Invest in the introduction of advanced automated production lines and intelligent equipment to improve the automation and intelligence level of production equipment. This can reduce manual intervention, improve production efficiency, and ensure the stability of product quality.

3. Improve employee skills and training: Provide employees with skills training and knowledge updates on a regular basis to improve employees' skill levels and production efficiency. Ensure that employees are familiar with production equipment, process flow and operating specifications, and master efficient production skills and operating techniques.

4. Introduce the concept of lean production: implement lean production management to improve production efficiency by eliminating waste, reducing costs, and improving production flexibility. Specifically, they include: reducing the rate of defective products, reducing inventory, improving material flow efficiency, optimizing production line layout, etc.

5. Strengthen supply chain management: Establish close cooperative relationships with suppliers to ensure stable, timely and reliable supply of raw materials. Optimize material warehousing and logistics management, reduce material loss and waste, and improve material flow efficiency.

6. Monitor production data and continuous improvement: By collecting and analyzing production data, we can understand the problems and bottlenecks in the production process and continuously improve production processes, processes and methods. Use data analysis to optimize production line balance, reduce production costs, and further improve production efficiency.

7. Implement preventive maintenance and management of equipment: Develop an equipment maintenance plan and conduct regular preventive inspections and maintenance of equipment. Ensure that equipment is in good condition, reduce equipment failure rates, and improve equipment service life and operating efficiency.

Our Factory

We, ManHua Electric are the experienced international supplier of electric products for more than 30 years. Our main products are Electrical distribution panel, automatic changeover switch(ATS), circuit breaker, contactor, surge arrestor, photocell and timer. Since year of 2005, our products have been exported to the market of the USA and Germany. Until now, we have more experiences in the markets of European and North America. From the year of 2017, we started our storage center operation in Chicago USA.

FAQ

Q: What is a contactor?

A: A contactor is an automatic electrical appliance used to connect or disconnect the control circuit of a motor or other electrical equipment.

Q: What is the working principle of a contactor?

A: The working principle of a contactor is to use electromagnetic force to close or open the contacts to control the circuit.

Q: What are the main components of a contactor?

A: The main components of the contactor include electromagnets, contacts, arc extinguishing devices, etc.

Q: What are the application fields of contactors?

A: The application fields of contactors include motor control, automatic control of power systems, etc.

Q: What is the load capacity of the contactor?

A: The load capacity of the contactor depends on its specification and model, and generally has a larger load capacity.

Q: What is the control voltage of the contactor?

A: The control voltage of the contactor is usually DC or AC, depending on the model and specification.

Q: How to choose a suitable contactor?

A: When choosing a suitable contactor, you need to consider factors such as the current, voltage, and usage environment of the circuit.

Q: What should we pay attention to when using contactors?

A: When using contactors, care must be taken to avoid overloading, short circuit and other abnormal conditions, and regular maintenance and inspections must be carried out.

Q: What are the common faults of contactors?

A: Common faults of contactors include contact ablation, electromagnet failure to engage, noise, etc.

Q: How to troubleshoot the contactor?

A: Troubleshooting contactor faults requires handling according to the specific fault type, such as replacing parts, adjusting parameters, etc.

Q: How long is the service life of a contactor?

A: The service life of a contactor depends on its working conditions and usage environment, and is generally more than thousands of hours.

Q: How to extend the service life of the contactor?

A: Proper use and maintenance are key to extending the service life of the contactor. Overloading and adverse environmental conditions need to be avoided, and regular cleaning and maintenance are required.

Q: What is the difference between a contactor and a relay?

A: Contactors and relays are both electrical appliances used to control circuits, but their working principles and applications are slightly different. Relays are usually used for signal control and small current control, while contactors are usually used for large current and high power control.

Q: What is the contactor’s pickup and release process?

A: Pull-in refers to the process in which the magnetic field attraction force is generated after the electromagnet is energized, causing the contacts to close; release refers to the process in which the magnetic field disappears and the contacts are disconnected after the electromagnet is de-energized.

Q: How to adjust the arc extinguishing device of the contactor?

A: The arc extinguishing device is an important part of the contactor and is used to extinguish the arc generated when the contacts are disconnected. Adjusting the arc extinguishing device can change its arc extinguishing effect, but requires professional knowledge and experience.

Q: What is a contactor coil?

A: The coil is an integral part of the electromagnet. When the coil is energized, a magnetic field is generated to drive the contact.

Q: Why do contactor contacts need arc extinguishing devices?

A: Since an arc will be generated when the contacts are disconnected, if there is no arc extinguishing device, the arc may ablate the contacts, causing damage to the contacts or a short circuit. The arc extinguishing device can effectively extinguish the arc and protect the contacts and circuits.

Q: What is the operating frequency of the contactor?

A: The operating frequency refers to the number of closing and opening operations that the contactor can perform per unit time. The frequency of operation affects the service life and reliability of the contactor.

Q: How to improve the reliability of contactors?

A: Improving the reliability of contactors requires starting from the aspects of design, manufacturing, use and maintenance, using high-quality materials and processes, and strengthening daily maintenance and upkeep.

Q: What are the maintenance requirements for contactors?

A: For frequently operated contactors, regular cleaning and maintenance should be carried out; the oxide film and dirt on the surface of the contacts should be removed to keep the contacts in good condition; the clearance of the contacts should be checked and adjusted to ensure appropriate spacing; regularly inspected and replaced Severely worn contacts to ensure reliability of electrical performance and safety performance.

As one of the most professional contactor manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy buy customized contactor made in China here from our factory. Contact us for quotation.

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