CONTACTOR

Product description

The AX series contactors are mainly used to control three-phase motors and power lines with a rated operating voltage of 690 V/1000 V AC. Suitable for the construction and industrial sectors, such as motor control, insulation and ventilation, air conditioning, water pumps, lifting equipment, lighting, and power factor correction.

Working principle:

Working principle: The working principle of an AC contactor is based on electromagnetic effects, and its core function is to control the power on and off of the electromagnetic coil to achieve the closure and disconnection of the main contact, thereby controlling the connection and disconnection of the load circuit. AC contactors are usually equipped with auxiliary contacts for control or signal transmission. Auxiliary contacts can be of the normally open (NO) or normally closed (NC) type, which change state with the action of the main contact and are used to achieve interlocking, signal indication, or other control functions.

General Product Information

• Place of Origin: 5th Floor, No. 3 Jinghong West Road, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province
• Brand Name: MINGTUO
• Model Number: AC Contactors
• Certification: ISO, CE, RoHS

Commercial Terms

Specification Details:

Minimum Order: Quantity 1 

Price:USD 3-9

Packaging:Carton

Delivery Time:Within 15 days

Payment Terms:100% Prepaid / 70%-30% / 80%-20%

Supply Ability:Ready to ship

Core technological advantages

• Using high-quality silver alloy contacts, it is arc resistant, wear-resistant, and has an electrical lifespan of over one million cycles.
• The mechanical structure is sturdy, with up to tens of millions of movements, suitable for frequent start stop scenarios.

• Low power consumption of the coil, energy-saving design (such as AC coil with energy-saving circuit).
• The contact pressure is reduced, the heat generation is small, and the power loss is minimized.

• Compliant with international safety certifications such as CCC, CE, UL, etc.
• The arc extinguishing system is efficient, has strong breaking ability, and is resistant to short-circuit current impact.
• Good insulation performance, dust-proof and anti electric shock design.

• Can integrate accessories such as auxiliary contacts, delay modules, mechanical interlocks, etc.

Key specifications

Technical Features

• Coil for the electromagnet which is energy saving
• Contact points are made of a high conductivity silver alloy
• Designed to be fully supported with auxiliary accessories
• Mounting can either be 35mm DIN-rail or by screw
• High electrical life and a strong break capacity
• A modular design that saves space and allows for small panels

Main Applications

Motor Control

• Start/stop operations for three-phase motors
• Forward/reverse control circuits
• Pumps, compressors, conveyors
• Industrial machinery and mechanical drives

HVAC & Environmental Systems

• Air conditioning compressors
• Ventilation and cooling fans
• Heating equipment control
• Chillers and AHU units

Industrial Automation

• Automated production equipment
• PLC and control system integration
• Robotics and process control
• Assembly line power management

Power Distribution

• Lighting circuit control
• Heating element switching
• Capacitor bank and transformer switching
• Power factor correction systems

Specialized Applications

• Elevators, cranes, and hoists
• Welding machines
• Data center power routing
• Renewable energy equipment

Product composition 

Test video

Coil detection

• Resistance measurement: Use a multimeter to measure the resistance at both ends of the coil, which should be approximately the same as the nominal value of the model or a new product of the same model. Both low resistance (short circuit) and infinite resistance (open circuit) require replacement.
• Insulation measurement: Use a megohmmeter (500V range) to measure the insulation resistance of the coil pins to the frame (ground), which should be ≥ 1M Ω.

Main contact detection

• On/off measurement: When the contact is disconnected, use a multimeter to measure the on/off range of each pair of main contacts, and it should be an open circuit (infinite resistance). Manually press down on the armature to close the contacts, which should display conductivity (resistance close to 0 Ω). Ensure good synchronization of the three-phase contacts in terms of on/off.

Insulation measurement

• Inter phase insulation: When the contacts are closed, use a megohmmeter to measure the insulation resistance between different phase contacts (such as L1 to L2, L2 to L3, L1 to L3), which should be ≥ 1M Ω.
• Ground insulation: Measure the insulation resistance of each phase contact to the contactor metal frame, which should be ≥ 1M Ω.

Auxiliary contact detection

• The method is the same as above. Use a multimeter to measure whether the normally open (NO) and normally closed (NC) contact states are correctly switched and whether the contact is good.

Recovery installation check

• After all tests are completed, reinstall the arc extinguishing cover and tighten all screws.
• Without connecting the main circuit, only power on/off the control coil, repeat the operation several times, listen to the sound, and observe whether the action is smooth.
• Finally, conduct an overall load test.

Service Support

• A large range of auxiliary modules and add-on accessories
• Documents of international certification
• 2 years warranty for all models
• Complete product manuals
• Custom configurations available upon request

Quick Detail Keywords

• AC Contactor
• Electrical Contactor
• Magnetic Contactor
• Motor Contactor
• Power Contactor
• Electromagnetic Switch
• Industrial Contactor
• 3-Pole/4-Pole Contactor
• 40A AC Contactor
• 380V Contactor
• Power Relay
• Industrial Power Controller

AC Contactor — Core Functions & Usage Scenarios

AC contactors are the key elements in power control systems that enable remote and automated switching of high-power loads by low-power control circuits. Due to their quick reaction, long service life, and safe separation capability, they are the perfect choice for those applications which require frequent switching and reliable protection.

Main Benefits

• High-current circuits controlled in a safe way
• Electrical isolation between control and power circuits
• Ability to be switched at high frequency
• Automation and control wiring made simple
• Overall equipment safety and lifespan ​‍​‌‍​‍‌​‍​‌‍​‍‌enhanced