Mechanical self-latching type ac contact means

Abstract

It has not only major structure of general contactor but also has secondary static iron-core, as well as corollary secondary coil and locker armature which can drive locking bolt to lock or release lockpin by locking core and controll locking or releasing of dynamic iron core thus to control on or off in controlled circuit. The advantages are: the two coils are only energized in the moment that controlled circuit is actuated to on or released to off, the contactor has no power dissipation, electromagnetic noise and vibration when the controlled circuit is working, safe and reliable operate and release, long service life, rational structure, simple mfg. process and low cost.

Description

Technical field: [0001] The invention belongs to the field of electrical operating devices and relates to a mechanical self-locking AC contactor. Background technique: [0002] In the prior art, single and three-phase AC contactors have been widely used for decades. Because there is always current passing through the coil during electrical operation, the useless power consumption is large during operation, the coil is easy to burn out, and the start-up is unstable. , the electromagnetic noise is large, the vibration is large, and it is easy to cause the contacts to be ablated due to the large arc, which will lead to accidents in the charged circuit; only in terms of power consumption, according to estimates by relevant departments, at present, there are about 40 million AC contactors in my country In operation, the annual power consumption alone reaches more than 10 billion kilowatt-hours. As early as 1981, the State Council issued the No. 2 Power Conservation Order with Docum...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, single and three-phase AC contactors have been widely used for decades. Because there is always current passing through the coil during electrical operation, the useless power consumption is large during operation, the coil is easy to burn out, and the start-up is unstable. , the electromagnetic noise is large, the vibration is large, and it is easy to cause the contacts to be ablated due to the large arc, which will lead to accidents in the charged circuit; only in terms of power consumption, according to estimates by relevant departments, at present, there are about 40 million AC contactors in my country In operation, the annual power consumption alone reaches more than 10 billion kilowatt-hours. As early as 1981, the State Council issued the No. 2 Power Conservation Order with Document (1981) No. 56. It pointed out that AC contactor power saving measures should be implemented, but The problem has not been fundamentally solved, and most of the methods adopted are to install electronic auxiliary circuits externally, but there is still current flowing through the coil during electrical operation, and the useless power consumption during operation does not decrease much, and the safety and stability of operation have not improved. , coupled with the lack of electronic technology for ordinary electricians, it is difficult to popularize and apply

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