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AC contactor is widely used as power switching and control circuit. It uses the main contact to open and close the circuit, and auxiliary contacts to execute the control instruction. The main contacts are generally only normally open contacts, the auxiliary contacts are often the two pairs of normally open and normally closed contacts. Small contactor is also used as an intermediate relay with the use of the main circuit. AC contactor contact , made by silver tungsten alloy, has good conductivity and high temperature ablation. AC contactor is mainly composed of four parts: (1) electromagnetic systems, including the attraction of the coil, the moving core and static core; (2) contact system, including the three main contact and one or two groups of normally open, normally closed auxiliary contacts, it is moving core is linked to each other linkage; (3) The interrupter device, generally larger AC contactor with interrupter device, in order to quickly cut off the arc, free from the burn of the main contact; (4) insulated housing and accessories, all kinds of springs, transmission, short-circuit ring, terminal. When the coil is energized, the static core produced electromagnetic force, the moving core pull, contacted with moving core linkage. Moving core run simultaneously driven by the three moving contacts, contact closure, and thus has power. When the coil power failures, suction disappears. Moving core linkage part of spring the separation depend on the reaction force of the spring, the main contact is open. So cut off the power. In electrical engineering, contact is used to connect or disconnect the AC and DC main circuit with a load or high-capacity automatic switch control circuit. The main control object is a motor, In addition, using other electrical loads, Such as electric heaters, electric welding, lighting equipment, contactors can be connected to not only cut off the circuit, but also with low voltage release the protective effect. Contactor controls of large capacity. It’s suit to frequent operation and remote control. It is one of the important components of the automatic control system. It is different requirements of different working AC contactor. Selection to take into account the focus is naturally different. Eight hour working day "and" short-time working equipment lessrestricted conditions in the selection of contactor, Consider only the contactor rated current greater than the actual operating current, Important equipment appropriate to put a little margin. "Uninterrupted working" system equipment selection contactor must first consider the dust-proof anti-climb power to prevent overheating of ability. It should not use the compact contactor (if necessary alternate circuit breaker). To prevent overheating, contactor capacity should be larger by more than twenty percentages. Electrical equipment for large-scale chemical production facilities mostly belong to this situation. Heavy tasks, and especially heavy intermittent cycle"system equipment selection of contactor must first consider the power of life and action the mechanical life of contacts, should be used CJ12 series (particularly applicable to the winding motor), CJ20 series contact or vacuum series. Derating can greatly improve the electrical life of the contactor, Easy motor starting current as the rated current of the selected contact to improve plant safety and reliability. Now in China, energy-saving AC contactor has a certain market, but it is not widely available, Traditional AC contactor is dominated by the user. Mainly due to higher prices of energy-saving type of contactor, the user could not accept one-time investment and need to be stepped up policy efforts on countries in the promotion of energy-efficient contactor, widely used to promote energy-efficient contactor. This article is only for the reader as a reference, and accepted full responsibility for your own. Out passed to the purpose of the reader more information, this does not mean that agrees with their views or confirms the authenticity of its contents. Yueqing Juwei Hardware Accessories Co., Ltd. is engaging in the processing, manufacture and molds development, such as electrical equipments, hardware parts, cars hardware parts, linkers, connectors, terminals etc..Our company possesses the advanced producing devices and modern management mode in the domestic and oversea, and cultivates lots of high quality technical management talents and experienced production workers; And we are committed to produce Stamping parts, AC contactor , Ring Terminals and GE ContactorsCJX2, we make a high efficiency marketing team, design and develop different kinds of products. By virtue of excellent design and professional services, we win lots of clients’ approval and support in the world. At the same time, we have cooperated some famous enterprises at home and abroad for a long time.
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