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Leqing city protect, obey electric the intersection of limited company and the intersection of acting and the intersection of contact apparatus and the intersection of attachment and the intersection of time delay and hair, LAD-T4 of Snide, telephone number 0577-27882628, 13634207967, QQ2876107667
The contact apparatus is used for putting through and dividing and breaking off the friendship the electric apparatus of direct-flow main circuit and high-capacity controlling circuit thick and fast remotely, its main control objective is an electric motor, the contact apparatus can control other electricity to support too, such as electric heater, lighting lamp, arc welding generator, bank of capacitors,etc..
Chinese name Undervoltage contact apparatus Concept Remote to put through and assign to and break off the friendship the direct-flow main circuit electric apparatus Main control objective Electric motor Other control objectives Electric heater, lighting lamp, arc welding generator,etc.
Categorised editor of the contact apparatus
Total classification
Divided into electromagnetic contactor, pneumatic contact apparatus, hydraulic contact apparatus,etc. according to the driving means of the stylus.
According to the development of electric vacuum technique and electronic device, there are vacuum contactors and electronic formula contact apparatuses.
The contact apparatus can be divided into AC contactor and DC contactor according to the working voltage kind.
Classification of the AC contactor
Divide into exchanging and direct current according to the kind of the controlling circuit of the main contact;
According to a point of unipolar, dipole, three-electrode, quadrupole, five of poles number of main contact very much;
Divide into the air type and vacuum type according to the arc extinguishing medium;
The main contact position when according to the field coil deenergization divides into normally openly, closure is normally open and normally closed frequently;
It is direct type, rotary to divide into according to the structural style and the lever is driving type:
According to having non-contact to divide into having contact type and not having contact type.
Structural analysis
The contact apparatus is mainly made up partly by electric magnetic system, stylus, arc extinction system, auxiliary stylus, support and outer cover,etc.
Main contact
The main contact of the contact apparatus has two kinds of forms of bridge contact of double-breakpoint and digitatus stylus of single break point. The former's advantage has two valid arc extinction areas, arc extinction is effectual. Usually, the nominal voltage is in 20A and the following small capacity AC contactor in 380V and following, rated current, spending the electric current passing naturally can go out the electric arc to give up nearly oral cathode effects two times at zero hour. The rated current is the AC contactor of 20- 80A, under the condition of installing additionally and guiding the arc slice or utilizing electric power arc-extinguishing of the loop, have one more by break in order to cooperating,can arc extinction effectively,but it is reliable, still need to install the grating or baffle additionally sometimes. If the rated current is greater than 80A, although the main contact of the AC contactor is that the double break is oral, must install the arc extinction grating additionally or adopt the other arc chutes definitely in its arc extinction. Usually, dual break stylus open distances are minor, the structure is relatively compact, the volume is small, do not use the flexible joint yet at the same time, so help to raise the mechanical life when is contacted.
However, dual break stylus is inconvenient in parameter control, the slippery sport that have not generally rolled at the time of closednesses, can't remove oxides of the surface of stylus, so the stylus needs silver usage or silver-based alloy material to make, cost great. The slippery sports of rolling in the closed course of digitatus stylus of single break, it is apt to remove external oxide, guarantee that it is reliable to keep in touch, so the stylus can be made with copper or copper base alloy material, the cost is lower. But stylus rolls the slippery sports meeting increases the mechanical wear of the stylus. Because of having a break only, the open distance of the stylus is oral and larger than double break, so the volume is relatively large, the moving contact needs to connect through the flexible joint at the same time, so that mechanical life is limited.
Arc control device
There are the following several kinds of arc control devices of the contact apparatus:
The electric power of utilizing the stylus loop to produce elongates the electric arc, make it contact with potter's clay arc extinguishing chamber, cool for it and go out. This kind of arc extinguishing chamber is the simplest arc control device, it is suitable for the AC contactor of the small capacity.
Grating arc-extinguishing chamber it used mainly in AC contactor, utilize electric current pass nearly cathode effect and cooling action arc blowout of the grating for zero hour naturally. The grating is generally by the punching of the steel plate, it has gravitation on electric arc, so it is small to gush out the arc distance, over voltage is low. But the grating will absorb the electric arc energy, so the great of its temperature, operate the frequency unfavorably in improving.
It is used mainly in DC contactors and heavy task AC contactors to connect the arc extinction of the magnetic blow out in series. Enter the arc chute rapidly under the electric dynamic action that the electric arc produces in the magnetic blow out coil, go out for cooling in its chamber wall. The arc chute is made of potter's clay more, and there are wide joint, narrow seam, cross wall and maze type various forms. Because is the hot ionized gas of the electric arc apt to run off to go out? ? Room, so it is easy for heat not to spread, it can be used for, it operates frequency to be relatively height. But the the intersection of arc extinction and way gush out arc from loud, the intersection of acousto-optic effect and old, the intersection of over voltage and great too. Go out alternating current arc, because the intersection of arc extinguishing chamber and ambilateral the intersection of steel and cleat and blower coil have core loss in being unshakable in one's determination, will make magnetic flux and electric current of magnetic blow out out-of-phase, so that the blowback phenomenon of electric arc may take place while disconnecting.

Leqing protects and obeys electric limited company main management, contact apparatus, circuit breaker, low-voltage apparatus, Leqing protects and is located in electric limited company " The capital of the Chinese electric apparatus " --Within the territory of Leqing. Specialize in the agent: Small-scale circuit breaker, residual current circuit-breaker, plastic shell circuit breaker, one pair of mains switches, AC contactor, DC contactor, actuator, photoelectric switch, proximity switch, knife switch, frequency converter. Our Israel " Ensure the quality of products in the job Anshun " It is a aim, it is that we protect the pursuit which obey people to offer the products with better characteristic to customer. LAD-T4;

Leqing city protect along electric limited company (are abbreviate as & ldquo; Protect and obey & rdquo; Electric apparatus, & ldquo; Protect & rdquo; & ldquo is fitted in the quality work of the card; Obey & rdquo) Establish in 2008, will lie in the willow town of Wenzhou of Zhejiang Province, one turns main management automatically with industry, combine science, industry and trade together, it is one of the domestic largest low-voltage apparatus retail trader and industrial automation system integration trader to collect all kinds of imported and famous brand electric and automatic products. The company adheres to many brand, difference development strategy, magnanimity and distribution mode that the speciality develops simultaneously, main agent's international and domestic famous electric brand of industry, Israel Snide is electric, ABB is electric, Siemens is electric, LS electric production, Changshu switch, people in Shanghai, 213 of the sky and water, the gold clock ties solemnly tight, De Miller Wei, electromechanics of Fuji, Omron, and spring, Mitsubishi, the intersection of Kean and person, Otto Knicks, Tuerk, it has, Taiwan fits, An Liang, it reach Taiwan, it is triumphant elder brother, intellectual circles, Changshu, god look at, mountain is military, in bamboo, male genital bright, Ke, good fortune, bright, getting more safe exactly, Germany strength, Rogge of TCL extraordinarily Shi, the coverage rate of the products is relatively great, involve undervoltage and products and industrial automation products of medium voltage power transmission and distribution; Users' extensive praise, and become appointed supplier and system integration trader of their industrial control system field.
The company is devoted to developing the circuit breaker, small-scale circuit breaker, residual current circuit-breaker, plastic shell circuit breaker, intelligent circuit breaker, universal circuit breaker, contact apparatus, AC contactor, thermorelay, duplicate supply, duplicate supply automatic transfer switch, surging protector, surge protector, frequency converter, soft start, P L C (programmable controller) Fuse, voltage transformer, mutual inductor, Coder, thermostat, photoelectric switch, proximity switch, limit switch, microswitch, limit switch, foot push, omnipotent change-over switch, magnetic switch, man of great talent of optic fibre, capacitive approach switch, displacement pick-off, technological development and after service of automatic products such as permanent magnetism reactor, flow switch, indicator light, button, pilot lamp, scram turning on or off, switching power supply,etc., it is high quality, Hi-Tech industry and provider of the consumer products at the same time. The company products rely on the outstanding behaviours in energy conservation and enviromental protection, widely used in fields such as the power plant, bank, hospital, hotel, chemical industry, military affairs, infrastructure of factory building, building house,etc.. Network overlapping China and overseas of production distribution.
Company's always aim is that the customer's suggestion is our valuable experience, do the specialized thing with the specialized heart. Our aim: Offer high-quality services to user wholeheartedly and qualified products. Our idea: Quality seeks survival, prestige seeks development. Our quality: People have no me and have & middot; People have I who am excellent. Our policy: Professional & mdash; — Absorbed in & mdash; — Attentive, our slogan: Face the future & mdash; — Surmount forever. Welcome old and new customers to cooperate sincerely, create brilliance! Choose, protect along the electric apparatus right away meaning choosing successfully, so we hope to succeed together with you!

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