CN2483816Y

CN2483816Y - Isolating switch for low-voltage load

Info

Publication number: CN2483816Y
Application number: CN 01232100
Authority: CN
Inventors: 刘挺芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-27
Filing date: 2001-07-27
Publication date: 2002-03-27
Anticipated expiration: 2011-07-27

Abstract

The utility model relates to a low-voltage load isolating switch, comprising an insulated shell, a wiring terminal, an operation handle, an operating mechanism, a dynamic contact and a static contact, the utility model is characterized in that the wiring terminal is provided outside the insulated shell, two sides of the insulated shell are provided with an insulating wall, a locking nut with an insulator is arranged on the lower part of the wiring terminal; a metal grid-plate for arc extinguishing is arranged in an arc-area which is formed when a dynamic contact and a static contact are broken, the dynamic contact and the static contact are continuously arranged in the insulated shell, the lower part of the metal grid-plate for arc extinguishing is provide with an electrical arc running channel. Therefore, the utility model has the advantages and the positive effects that the short-circuit existed among each wiring terminal can be effectively prevented, the protection grade is improved; meanwhile, the acknowledged disadvantage of thread connection slipping off caused by that the wiring terminal is reused for many times can be effectively prevented, not only can the utility model be safely used, but also the wiring is convenient, the strength of the wiring terminal can be greatly improved. The utility model also has the advantages of the function of arc extinguishing, strong breaking capacity as well as the improved safety of isolation, and the electric arc can be extinguished as soon as possible.

Description

The low-voltage load isolating switch

Technical field

The utility model belongs to H01H electric switch class technology, particularly relates to the low-voltage load isolating switch of the strong and high-protection level of a kind of breaking capacity.

Background technology

At present known low-voltage load isolating switch, be to be provided with operating grip and binding post by outside at insulation crust, be provided with operating mechanism in insulation crust, moving contact even is equipped with in lower floor in insulation crust by operating mechanism, and lower floor also is equipped with and the corresponding fixed contact composition of moving contact quantity in insulation crust.Because itself structure is limit, therefore also have deficiency, the binding post of the outside of insulation crust is exposed, causes the short circuit between each binding post easily, and makes the degree of protection of load-break switch lower; In addition, load-break switch itself does not have good arc extinguishing function, and not only breaking capacity is low to cause it, but also because of surrounding medium charing height, causes isolation effect poor.

Summary of the invention

The utility model provides a kind of low-voltage load isolating switch with the strong and high-protection level of breaking capacity for solving the technical problem that exists in the known technology.

The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:

The first is provided with binding post in the outside of insulation crust both sides are provided with the insulation body of wall, and the lock nut of tape insulation body is housed in the bottom of binding post.

It two is to connect disconnecting the arc district that the back forms by moving contact and fixed contact and being built-in with the metal arc extinguishing grid pieces of dress in insulation crust, is provided with arc channel in the bottom of metal arc extinguishing grid pieces.

Advantage and the good effect that the utlity model has are: owing to being provided with the insulation body of wall in the both sides of binding post and in the bottom of binding post lock nut being housed, so can effectively prevent the short circuit between each binding post, improve degree of protection of the present utility model; While has also effectively avoided known terminals through repeatedly using the deficiency of thread stripping, and is not only safe in utilization, and easy-to-connect, improves the intensity of terminals greatly.Be built-in with the metal arc extinguishing grid pieces and be provided with arc channel owing to when disconnecting, forming the arc district again in its underpart by moving contact and fixed contact, therefore make and the utlity model has the arc extinguishing function, breaking capacity is strong, extinguish arcs as early as possible, the consequence that the insulating bodies dielectric strength that reduction causes because of the electric arc calcination descends and the charing of surrounding medium improve seperating safety.

Description of drawings

Fig. 1 is a perspective view of the present utility model.

Embodiment

For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

Operating mechanism 12 is installed in the insulation crust 2, on operating mechanism 12, connect and operating grip 1 is housed and it is drawn out to outside the insulation crust 2, connect in insulation crust 2 by operating mechanism 12 moving contact 9 and contact position indicating device 11 are housed, on insulation crust 2, be provided with the inspection hole 13 that shows contact position indicating device 11, also be equipped with in insulation crust 2 and the corresponding fixed contact 7 of moving contact 9 quantity, the arc district that forms after disconnecting at the dynamic and static contact by every group is built-in with one group of metal arc extinguishing grid pieces 8.Bottom at every group of metal arc extinguishing grid pieces 8 all is provided with arc channel 10.For the short circuit between each binding post 4 of avoiding insulation crust 2 outsides and improve the intensity of each binding post 4 itself, then all be provided with insulation body of wall 3, and the lock nut 6 of tape insulation body 5 is housed in the bottom of each binding post 4 in the both sides of each binding post 4.

The electric arc that produces when disconnecting big electric current at moving contact 9, fixed contact 7 is attracted in the metal arc extinguishing grid pieces 8, by metal arc extinguishing grid pieces 8 electric arc is separated into some short arcs, can improve the nearly cathode drop of electric arc so greatly, and electric arc is extinguished at once.The arc channel 10 that bottom by metal arc extinguishing grid pieces 8 is provided with is drawn the gas in arc district outside the insulation crust smoothly.So can reduce the consequence of the insulating bodies dielectric strength decline that causes because of the electric arc calcination and the charing of surrounding medium, improve breaking capacity of the present utility model and isolation performance.

Claims

1. low-voltage load isolating switch, be to be provided with operating grip and binding post by outside at insulation crust, be provided with operating mechanism in insulation crust, moving contact even is equipped with in lower floor in insulation crust by operating mechanism, lower floor also is equipped with the corresponding fixed contact of moving contact quantity and forms in insulation crust, it is characterized in that:

(a) both sides that are provided with binding post in the outside of insulation crust are provided with the insulation body of wall, and the lock nut of tape insulation body is housed in the bottom of binding post;

(b) in insulation crust, connect disconnecting the arc district that the back forms by moving contact and fixed contact and being built-in with the metal arc extinguishing grid pieces of dress, be provided with arc channel in the bottom of metal arc extinguishing grid pieces.