CN204011222U

CN204011222U - A kind of isolation/ground connection three-station with T shape knife bar

Info

Publication number: CN204011222U
Application number: CN201420381472.1U
Authority: CN
Inventors: 陈波
Original assignee: JIANGSU SHUODE POWER-TECH Co Ltd
Current assignee: JIANGSU SHUODE POWER-TECH Co Ltd
Priority date: 2014-07-11
Filing date: 2014-07-11
Publication date: 2014-12-10
Anticipated expiration: 2024-07-11

Abstract

The utility model relates to a kind of isolation/ground connection three-station of the T of having shape knife bar, described switch comprises insulation crust body, in described insulation crust body, be provided with T shape moving knife bar, on described insulation crust body, be also provided with grounding contact, the first fixed contact, the second fixed contact, auxiliary contact, described grounding contact, the first fixed contact, the second fixed contact, auxiliary contact are arranged on the surrounding of insulation crust body uniformly.Advantage of the present utility model is as follows, 1) overall construction design is ingenious, and disassembly and assembly are easy to maintenance, cost is lower; 2) by being provided with T shape knife bar, to split to close and carry out revolving control, wiring is clear, and the anglec of rotation is less; 3) in this technical scheme, the insulation system of auxiliary contact is set to the insulation system of plate electrode, and electric field is introduced in epoxy by air, has eliminated the concentrated problem of little air gap place electric field, has improved insulating reliability; 4) owing to being provided with auxiliary contact, insulation distance is strengthened, realize the miniaturization processing of product.

Description

A kind of isolation/ground connection three-station with T shape knife bar

Technical field

The utility model relates to a kind of construction of switch, and specifically a kind of isolation/ground connection three-station with T shape knife bar, belongs to switchgear technical field.

Background technology

Switch is seen everywhere in daily life, presses solidly body insulation looped network switch apparatus in existing, is generally all equipped with isolating switch and earthed switch.Switchgear is equipped with isolating switch and earthed switch common are two kinds of modes.Wherein mode is to adopt independently isolating switch and independently an earthed switch, and these two switches are separated from each other, and is equipped with respectively separately independently operating mechanism; Another mode is the isolating/grounding switch that is equipped with three stations, this switch is that the function of isolating switch and earthed switch is combined, on a switch, complete two kinds of functions by two-step action, this switch is generally furnished with the operating mechanism of three stations.In common single isolation fracture three-station isolating/grounding switch, generally only have two contacts, i.e. main contact and grounding contact; In two isolation fracture three-station isolating/grounding switch, generally also only have three contacts, i.e. two main contacts and grounding contact.

In two isolation fracture three-station isolating/grounding switch, there is the 4th contact existing, there is have not been reported of auxiliary contact.Prior art switch there is following problem, 1) to produce the insulating reliability of sheet less, 2) product insulation distance of the prior art is larger, cannot miniaturization.Therefore, a kind of new device of exigence solves the problems of the technologies described above.

Summary of the invention

The utility model, just for the technical problem existing in prior art, provides a kind of isolation/ground connection three-station of the T of having shape knife bar, and this device overall structure relates to ingenious, easy to operate, and dismounting and change is simple, has greatly improved the reliability of insulation.

To achieve these goals, the technical solution adopted in the utility model is, a kind of isolation/ground connection three-station with T shape knife bar, it is characterized in that, described switch comprises insulation crust body, is provided with T shape moving knife bar in described insulation crust body, on described insulation crust body, be also provided with grounding contact, the first fixed contact, the second fixed contact, auxiliary contact, described grounding contact, the first fixed contact, the second fixed contact, auxiliary contact are arranged on the surrounding of insulation crust body uniformly.

As a kind of improvement of the present utility model, described switch also comprises shading ring, and described T shape moving knife bar is connected with one end of auxiliary contact, and the other end connects shading ring.

As a kind of improvement of the present utility model, described switch also comprises side cabinet, and described side cabinet is connected with shading ring.

As a kind of improvement of the present utility model, the insulation system of auxiliary contact is set to the insulation system of plate electrode.

With respect to prior art, advantage of the present utility model is as follows, 1) overall construction design is ingenious, and disassembly and assembly are easy to maintenance, cost is lower; 2) by being provided with T shape knife bar, to split to close and carry out revolving control, wiring is clear, and the anglec of rotation is less; 3) in this technical scheme, the insulation system of auxiliary contact is set to the insulation system of plate electrode, and electric field is introduced in epoxy by air, has eliminated the concentrated problem of little air gap place electric field, has improved insulating reliability; 4) owing to being provided with auxiliary contact, insulation distance is strengthened, realize the miniaturization processing of product.

Brief description of the drawings

Fig. 1 is the utility model on-position schematic diagram;

Fig. 2 is the utility model isolated location schematic diagram;

Fig. 3 is the utility model earthing position schematic diagram;

Fig. 4 is auxiliary contact insulation system schematic diagram;

Wherein, 1 is T shape moving knife bar, and 2 is grounding contact, and 3 is the first fixed contact, and 4 is auxiliary contact, and 5 is the second fixed contact, and 6 is insulation crust body, and 7 is shading ring, and 8 is side cabinet.

Embodiment

In order to deepen, to understanding and cognition of the present utility model, below in conjunction with accompanying drawing, the utility model to be further described and to be introduced.

embodiment 1:as Fig. 1-Fig. 3, a kind of isolation/ground connection three-station with T shape knife bar, described switch comprises insulation crust body, in described insulation crust body, be provided with T shape moving knife bar 1, on described insulation crust body, be also provided with grounding contact 2, the first fixed contact 3, the second fixed contact 5, auxiliary contact 4, described grounding contact 2, the first fixed contacts 3, the second fixed contact 5, auxiliary contact 4 are arranged on the surrounding of insulation crust body uniformly.This isolating/grounding switch has three positions, i.e. on-position Fig. 1, isolated location Fig. 2, earthing position Fig. 3, and major loop when three positions, the state description of grounded circuit and auxiliary contact is as follows:

Referring to Fig. 1, when on-position, T shape moving knife bar 1 position as shown in Figure 1, now the first fixed contact 3 is communicated with the second fixed contact 5 by T shape moving knife bar 1, and conduction major loop is connected, now auxiliary contact 4 and major loop equipotential.

After vacuum interrupter cut-offs, T shape moving knife bar 1 rotates clockwise after 45 °, form the isolated location as shown in view in Fig. 2, now major loop forms an isolation fracture between the first fixed contact 3 and T shape moving knife bar 1, between T shape moving knife bar and the second fixed contact 5, form another isolation fracture, now auxiliary contact 4 is floating potential.

When T shape moving knife bar 1 rotates clockwise after 45 ° again, form earthing position as shown in Figure 3, now grounding contact 2 is communicated with formation grounded circuit with T shape moving knife bar 1 and the second fixed contact 5.Now auxiliary contact 4 is earth potential.

embodiment 2:as Fig. 1-Fig. 3, as a kind of improvement of the present utility model, described switch also comprises shading ring 7, described T shape moving knife bar 1 is connected with one end of auxiliary contact 4, the other end connects shading ring 7, and described switch also comprises side cabinet 8, and described side cabinet 8 is connected with shading ring 7.In this technical scheme, 4 of auxiliary contacts play current potential connection effect and current flowing not, so be auxiliary contact, T shape moving knife bar 1 contacts with one end of auxiliary contact 4, both are equipotentials, in the time that major loop is connected, it is high potential, other one end of auxiliary contact 4 is cast in the housing of epoxide resin material, and forms plate electrode with the same shading ring 7 being cast in epoxy resin housing, and shading ring 7 is connected with side cabinet 8.

Plate electrode is in all electrode shapes, a kind of electrode shape that electric field uniformity coefficient is best.Electric field is introduced plate electrode by this structure, and this electrode or in the very high epoxide resin material of dielectric strength, and this has just ensured the dielectric strength at this place.If this place cancels auxiliary contact 4 and shading ring 7 structures, T shape moving knife bar 1 and side cabinet 8 close together, can produce very high electric field at air small air gap place, cause air breakdown, insulate destroyed.All the other structures are identical with embodiment 1 with advantage.

The utility model can also, by combining with embodiment 1 in technical characterictic described in embodiment 2, form new execution mode.

It should be noted that above-described embodiment, be not used for limiting protection range of the present utility model, the equivalents of having done on the basis of technique scheme or substitute and all fall into the scope that the utility model claim is protected.

Claims

1. one kind has isolation/ground connection three-station of T shape knife bar, it is characterized in that, described switch comprises insulation crust body, in described insulation crust body, be provided with T shape moving knife bar, on described insulation crust body, be also provided with grounding contact, the first fixed contact, the second fixed contact, auxiliary contact, described grounding contact, the first fixed contact, the second fixed contact, auxiliary contact are arranged on the surrounding of insulation crust body uniformly.

2. isolation/ground connection three-station with T shape knife bar as claimed in claim 1, is characterized in that, described switch also comprises shading ring, and described T shape moving knife bar is connected with one end of auxiliary contact, and the other end connects shading ring.

3. isolation/ground connection three-station with T shape knife bar as claimed in claim 2, is characterized in that, described switch also comprises side cabinet, and described side cabinet is connected with shading ring.

4. isolation/ground connection three-station with T shape knife bar as claimed in claim 3, is characterized in that, the insulation system of auxiliary contact is set to the insulation system of plate electrode.