CN202633065U - Current loop structure of isolation switch - Google Patents
Current loop structure of isolation switch Download PDFInfo
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- CN202633065U CN202633065U CN 201220254751 CN201220254751U CN202633065U CN 202633065 U CN202633065 U CN 202633065U CN 201220254751 CN201220254751 CN 201220254751 CN 201220254751 U CN201220254751 U CN 201220254751U CN 202633065 U CN202633065 U CN 202633065U
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- contact
- fixed contact
- moving contact
- fixed
- current loop
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Abstract
The utility model provides a current loop structure of an isolation switch. A current loop design is optimized, and the reliability of a current loop is improved. The current loop structure of the isolation switch comprises a movable contact (4) and a fixed contact (3), and is characterized in that the movable contact (4) is fixed on a movable contact bracket (1); one end of the movable contact bracket (1) is connected with a moving mechanism (7) for driving the movable contact bracket (1) to move, and the other end of the movable contact bracket (1) is connected with a flexible wire (2); the static contact (3) is fixed on a fixed contact support (6); and the free end of the lower part of one side, which is connected with the fixed contact (3), of the static contact support (6) extends towards the lower side of the movable contact bracket (1) to form an arc striking angle (8). According to the current loop structure, the design of the arc striking angle is introduced, so that burn of an electric arc to the contacts is reduced; and the electrical service life of a product is improved.
Description
Technical field
The utility model relates to the isolating switch field, is specifically related to the current loop structure of isolating switch.
Background technology
At present, multiple contact contact is all adopted in the design of domestic isolating switch inner current loops, utilizes the rectilinear motion up and down of moving contact rack to accomplish the operation of " combined floodgate " and " separating brake ".Also have indivedual producers to adopt single contact loop, still, the moving contact of this series products and the electric power between the fixed contact are big to the contact pressure influence.
In the isolating switch of Schneider INT125; Utilize the rectilinear motion up and down of moving contact rack to realize the operation of moving contact and fixed contact " combined floodgate " and " separating brake "; Have four moving contacts on the contact supporting; It contacts with four fixed contacts respectively, and current circuit is to realize through four pairs of moving contacts and contacting of fixed contact.There is following shortcoming in the isolating switch of this structure: multiple-contact contact has brought risk for the reliability of current circuit; This current circuit does not have the arc of leading mechanism, when moving contact and fixed contact when " combined floodgate " and " separating brake " operated, the electric arc of generation will produce serious ablation to moving contact and fixed contact, so that reduced the useful life of product; The divide-shut brake speed of contact is relevant with dependent manual operation, influences the interrupting performance of moving contact and fixed contact.
The utility model content
Based on above-mentioned deficiency of the prior art; The utility model is intended to propose a kind of current loop structure of isolating switch; It has optimized the current circuit design, has improved the reliability of current circuit, makes the electric power between moving contact and the fixed contact minimum to the contact pressure influence.Simultaneously, this current loop structure has also adopted the design of arc leading angle, has reduced the dead time of electric arc between moving contact and fixed contact, has improved the ablation of electric arc to contact well.
The technical scheme of the current loop structure of a kind of isolating switch of the utility model is: a kind of current loop structure of isolating switch; Comprise a moving contact, a fixed contact; Wherein: moving contact is fixed on the moving contact rack; Moving contact rack one end is connected with the motion that is used to drive said moving contact rack motion; The other end is connected with flexible conductor, and fixed contact is fixed on the fixed contact bearing, and the bottom free end of the side that the fixed contact bearing is connected with fixed contact extends to form arc leading angle towards the moving contact rack below.
Further, flexible conductor is connected to the below of said moving contact, and electric current flows through flexible conductor from inserting terminal, and with after fixed contact contact, the mobile again fixed contact that passes through is outwards exported from the fixed contact bearing at said moving contact.
Compare with the current circuit of the isolating switch of described Schneider INT125 before, the current loop structure of the isolating switch of the utility model has been introduced flexible conductor, provides via flexible conductor and inserts being electrically connected between terminal and the moving contact rack.Only use a pair of moving contact and fixed contact, reduced the quantity of contact, improved the reliability of current circuit.And electric current flows into from the below of said moving contact, and the sense of current of isolating switch of the prior art is generally directly and imports from the moving contact rectilinear direction.
Further, motion has the quick-acting closure of quick-make moving contact and fixed contact.
The quick-acting closure of motion makes that moving contact and fixed contact can quick-makes, and the divide-shut brake speed of contact and dependent manual operation are irrelevant, have improved the interrupting performance of moving contact and fixed contact.
Further, the fixed contact bearing is a bending shape, and fixed contact is arranged on the vertical edge of fixed contact bearing.
The electric current that conducts to the fixed contact bearing through fixed contact will pass through the upwards conduction of vertical edge of fixed contact bearing, and flow through widthwise edge and outwards output.
Further, the fixed contact bearing is inverted U-shaped, and fixed contact is arranged on the vertical edge of an inverted U-shaped side, and the vertical edge end of inverted U-shaped opposite side is to horizontal direction bending and stretch out.
The electric current that conducts to the fixed contact bearing through fixed contact will pass through the upwards conduction of inverted U-shaped vertical edge that fixed contact belongs to; The inverted U-shaped top margin of flowing through; Vertical edge through inverted U-shaped opposite side conducts straight down again; When arriving vertical edge terminal, transfer horizontal direction conduction and outwards output to by direction conduction straight down again.
According to the analysis of electric power simulation software, the design of the fixed contact bearing of these two kinds of forms can be cut down the influence to moving contact and fixed contact deciliter of electric power in the current circuit effectively.
Further, the length of inverted U-shaped top margin is 2mm.
Further, the material of moving contact and fixed contact is the silver compound of environmental sound, and the resistance fusion welding of the material of moving contact and fixed contact is strong, but the mobility of electric arc on fixed contact is poor.The trend that the utility model utilizes the little direction of the oriented resistance of electric arc to move increases the design of arc leading angle on the fixed contact bearing, reduce the dwell time of electric arc between moving contact and fixed contact effectively, has improved the ablation of electric arc to moving contact and fixed contact.
Further, when moving contact and fixed contact were in open mode, the distance of the free end of the free end of arc leading angle to moving contact rack was greater than 5.5mm.
Further, when moving contact and fixed contact were in closure state, limit that the fixed contact bearing is connected with fixed contact and the minimum range between the moving contact rack were greater than the minimum range between the free end of limit that forms arc leading angle and moving contact rack.
Further, electric current is to flow into the moving contact below downwards through flexible conductor, on flexible conductor, flows from top to bottom, through the contact point of flexible conductor and contact supporting, on moving contact rack, flows from bottom to up towards moving contact again.
The design of this direction of current flow is circuitous flowing, and can further reduce electrodynamic repulsion force than the streamlined flow of electric current of the prior art.
Further, electric current is upwards to flow into the moving contact below through flexible conductor, on flexible conductor, flows from bottom to up, through the contact point of flexible conductor and contact supporting, on moving contact rack, flows from bottom to up towards moving contact again.
In sum, the current loop structure of the utility model has reduced the quantity of contact, has improved the reliability of current circuit system widely and has practiced thrift cost effectively; Electrodynamic repulsion force is minimized the influence of moving contact and fixed contact " separating brake " and " combined floodgate ", improved the electric property of isolating switch effectively; The dead time of electric arc between contact has been shortened in the design of the arc leading angle of on the fixed contact bearing, introducing, and has reduced the ablation of electric arc to contact widely, has improved the electrical endurance of product effectively.
Description of drawings
Other advantage of the utility model and characteristic will only become obviously clear more with the explanation that provide and that represent the specific embodiment of the utility model in the accompanying drawings of the purpose of non-limiting example from ensuing, in the accompanying drawings:
Fig. 1 is the sketch map of the current loop structure of the utility model;
Fig. 2 a to Fig. 2 c is the different embodiment of moving contact rack, fixed contact bearing and the flexible conductor of the current loop structure of the utility model;
Fig. 3 be the execution mode to the moving contact rack of the current loop structure among Fig. 2 b and Fig. 2 c, fixed contact bearing and flexible conductor carry out after the emulation the relation curve of distance of the electrodynamic repulsion force that draws and inverted U-shaped top margin;
Fig. 4 a and Fig. 4 b are respectively moving contact and fixed contact and are in closed and open mode following time, the sketch map of arc leading angle;
Fig. 5 is moving contact and fixed contact when opening, and arc leading angle is to the sketch map of the guiding of electric arc.
Description of reference numerals
1 moving contact rack
2 flexible conductors
3 fixed contacts
4 moving contacts
5 insert terminal
6 fixed contact bearings
7 motions
8 arc leading angles
Embodiment
To further specify the current loop structure of the utility model below referring to figs. 1 through Fig. 5.
As shown in Figure 1, the current loop structure of the isolating switch of the utility model comprises moving contact 4, fixed contact 3; Moving contact 4 is fixed on the moving contact rack 1, and an end of moving contact rack 1 is connected with motion 7, and this motion 7 is used to drive moving contact rack 1 motion; The other end of moving contact rack 1 is connected with flexible conductor 2, and fixed contact 3 is fixed on the fixed contact bearing 6, and electric current gets into from inserting terminal 5; Flow through flexible conductor 2 and moving contact rack 1 to moving contact 4; Moving contact 4 is with after fixed contact 3 contacts, and the fixed contact 3 of flowing through is again outwards exported from fixed contact bearing 6 at last.Bottom free end in the side that fixed contact bearing 6 is connected with fixed contact 3 extends to form arc leading angle 8 below the moving contact bearing.
Compare with the current circuit of the isolating switch of described Schneider INT125 before, the current loop structure of the isolating switch of the utility model has been introduced flexible conductor 2, and the electrical connection that inserts between terminal 5 and the moving contact rack 1 is provided via flexible conductor 2.Only use a pair of moving contact and fixed contact, reduced the quantity of contact, improved the reliability of current circuit.And electric current flows into from the below of said moving contact, and the sense of current of isolating switch of the prior art is generally directly and imports from the moving contact rectilinear direction.
Shown in Fig. 2 a; In an embodiment of the utility model, fixed contact bearing 6 is arranged on the vertical edge b of fixed contact bearing 6 for right angle bending shape
fixed contact 3.Electric current flows into from the moving contact below through flexible conductor 2; Flow direction is on flexible conductor 2, to flow downward to the moving contact rack end earlier, and then flows towards moving contact 4 directions, then flows through moving contact 4; Through the dynamic and static contact 4,3 that is in contact with one another; Electric current conducts to fixed contact bearing 6 through fixed contact 3, and then through the upwards conduction of vertical edge b of fixed contact bearing 6, flows through its widthwise edge d and outwards output.
In this embodiment; The limit b that the limit b that moving contact 4 bears comes from fixed contact 3 places belongs to the electronic suction Fs of the limit c1 at moving contact 4 places and fixed contact 3 that moving contact 4 bears cancels out each other to the electrodynamic repulsion force Fr of flexible conductor c2 to a certain extent, helps the effective control to 4 holding capacity of moving contact.
Shown in Fig. 2 b, in another embodiment of the utility model, fixed contact bearing 6 is inverted U-shaped, and fixed contact 3 is arranged on the vertical edge b on inverted U-shaped right side, and the vertical edge a in inverted U-shaped left side is to horizontal direction bending and stretch out.Electric current flows into from the moving contact below through flexible conductor 2, and flow direction is on flexible conductor, to flow downward to the moving contact rack end earlier, and then flows to moving contact 4 directions along moving contact rack; Then flow through moving contact 4; Through the dynamic and static contact 4,3 that is in contact with one another, electric current conducts to fixed contact bearing 6 through fixed contact 3, will pass through the upwards conduction of vertical edge b on inverted U-shaped right side; The inverted U-shaped top margin of flowing through; Vertical edge a through inverted U-shaped left side conducts straight down again, when arriving vertical edge a terminal, transfers horizontal direction conduction and outwards output to by direction conduction straight down again.Flexible conductor 2 raises up; Electric current is to flow into the moving contact rack below downwards through flexible conductor 2; On flexible conductor, flow from top to bottom,, on moving contact rack, flow from bottom to up again towards moving contact through the contact point of flexible conductor and contact supporting; Shown in arrow, flow towards moving contact 4 from bottom to up more from top to bottom.
Another embodiment of the utility model shown in Fig. 2 c and the difference of the embodiment shown in Fig. 2 b are; Flexible conductor 2 is to lower convexity, and electric current is upwards to flow into the moving contact rack below through flexible conductor 2, on flexible conductor, flows from bottom to up; Contact point through flexible conductor and contact supporting; On moving contact rack, flow from bottom to up again, shown in arrow, flow towards moving contact 4 from bottom to up towards moving contact.
In Fig. 2 a to 2c, electric current all is to get into through the below of flexible conductor 2 from moving contact 4, and when electric current got into, electric current elder generation flowed downward along flexible conductor, and the arrival moving contact rack upwards flows behind the end again, makes electric current circuitous mobile.
Analyze according to the electric power simulation software, the design of the fixed contact bearing of these two kinds of forms can be cut down in the current circuit electric power effectively to the influence of moving contact and fixed contact divide-shut brake.
The execution mode that Fig. 3 shows moving contact rack, fixed contact bearing and the flexible conductor of the current loop structure among Fig. 2 b and Fig. 2 c carry out after the emulation the relation curve of distance of the electrodynamic repulsion force that draws and inverted U-shaped top margin.
The coordinate system of unified Fig. 2 b to Fig. 2 c in the electric power simulation software; When in circuit, leading to the situation of identical currents (I=7000A); Among the embodiment shown in Fig. 2 c, along with two inverted U-shaped vertical edge a, the increase of distance between b, moving contact 4 suffered electrodynamic repulsion forces continue to increase; Even when inverted U-shaped vertical edge a and the distance between the vertical edge b are approximately 0, the suffered minimum electrodynamic repulsion force of moving contact rack 1 this moment is apart from being 65.8N.m; Among the embodiment shown in Fig. 2 b; When inverted U-shaped vertical edge a and the distance between the vertical edge b are 0; Because the vertical edge b that receives of moving contact 4 cancels out each other towards the electronic suction Fs of flexible conductor 2 with vertical edge a towards the electrodynamic repulsion force Fr of flexible conductor 2 approx, this moment, moving contact rack 1 suffered minimum electrodynamic repulsion force distance was 10.5N.m.Consider the implementation of processes condition, getting inverted U-shaped vertical edge a and the distance between the vertical edge b is the optimal design of the circuit system structure of the utility model for 2mm, and this moment, the electrodynamic repulsion force square was 14.5N.m.
Fig. 4 a and Fig. 4 b show moving contact 4 and are in closed with fixed contact 3 and open mode following time, the sketch map of arc leading angle.
The bottom free end on the limit that fixed contact bearing 6 is connected with fixed contact 3 stretches out and forms arc leading angle 8.
The material of moving contact 4 and fixed contact 3 is the silver compound of environmental sound, and the resistance fusion welding of the material of moving contact 4 and fixed contact 3 is strong, but the mobility of electric arc on fixed contact 4 is poor.The trend that the utility model utilizes the little direction of the oriented resistance of electric arc to move; On fixed contact bearing 6, increase the design of arc leading angle 8; Reduce the dwell time of electric arc between moving contact 4 and fixed contact 3 effectively, improved the ablation of electric arc moving contact 4 and fixed contact 3.
When moving contact 4 and fixed contact 3 are in open mode, the free end of the free end of arc leading angle 8 to moving contact rack 1 apart from d3 greater than 5.5mm.
When moving contact 4 and fixed contact 3 were in closure state, limit that fixed contact bearing 6 is connected with fixed contact 3 and the minimum range d1 between the moving contact rack 1 were greater than the minimum range d2 between the free end of limit that forms arc leading angle 8 and moving contact rack 1.
As shown in Figure 5, in the presence of arc leading angle 8, move down shown in the arrow of the electric arc between moving contact 4 and the fixed contact 3 in Fig. 5.
In sum, the current loop structure of the utility model has reduced the quantity of contact, has improved the reliability of current circuit system widely and has practiced thrift cost effectively; Electrodynamic repulsion force is minimized the influence of moving contact and fixed contact " separating brake " and " combined floodgate ", improved the electric property of isolating switch effectively; The dead time of electric arc between contact has been shortened in the design of the arc leading angle of on the fixed contact bearing, introducing, and has reduced the ablation of electric arc to contact widely.Improved the electrical endurance of product effectively.
More than the utility model has been carried out detailed introduction; For one of ordinary skill in the art; Thought according to the utility model embodiment; Change on embodiment and range of application should not thought the scope that has departed from the utility model protection, and in sum, this description should not be construed as the restriction to the utility model.
Claims (8)
1. the current loop structure of an isolating switch; Comprise a moving contact (4), a fixed contact (3); It is characterized in that: said moving contact (4) is fixed on the moving contact rack (1); Said moving contact rack (1) one end is connected with the motion (7) that is used to drive said moving contact rack (1) motion; The other end is connected with flexible conductor (2), and said fixed contact (3) is fixed on the fixed contact bearing (6), and the bottom free end of the side that said fixed contact bearing (6) is connected with said fixed contact (3) extends to form arc leading angle (8) towards said moving contact rack (1) below.
2. the current loop structure of isolating switch according to claim 1; It is characterized in that: said flexible conductor (2) is connected to the below of said moving contact (4); Electric current flows through said flexible conductor (2) from inserting terminal (5);, flow again with after said fixed contact (3) contacts at said moving contact (4), from outwards output of said fixed contact bearing (6) through said fixed contact (3).
3. the current loop structure of isolating switch according to claim 1 and 2, it is characterized in that: said motion (7) has the quick-acting closure of quick-make moving contact and fixed contact.
4. the current loop structure of isolating switch according to claim 1 and 2, it is characterized in that: said fixed contact bearing (6) is a bending shape, and said fixed contact (3) is arranged on the vertical edge of said fixed contact bearing (6).
5. the current loop structure of isolating switch according to claim 1 and 2; It is characterized in that: said fixed contact bearing (6) is for inverted U-shaped; Said fixed contact (3) is arranged on the vertical edge (b) of an inverted U-shaped side, and the vertical edge of inverted U-shaped opposite side (a) end is to horizontal direction bending and stretch out.
6. the current loop structure of isolating switch according to claim 5, it is characterized in that: the length of inverted U-shaped top margin is 2mm.
7. the current loop structure of isolating switch according to claim 1 and 2; It is characterized in that: when being in open mode, the distance of the free end of the free end of said arc leading angle (8) to said moving contact rack (1) is greater than 5.5mm at said moving contact (4) and said fixed contact (3).
8. the current loop structure of isolating switch according to claim 7; It is characterized in that: when being in closure state, limit that said fixed contact bearing (6) is connected with said fixed contact (3) and the minimum range (d1) between the said moving contact rack (1) are greater than the minimum range (d2) between the free end of limit that forms said arc leading angle (8) and said moving contact rack (1) at said moving contact (4) and said fixed contact (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220254751 CN202633065U (en) | 2012-05-31 | 2012-05-31 | Current loop structure of isolation switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220254751 CN202633065U (en) | 2012-05-31 | 2012-05-31 | Current loop structure of isolation switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202633065U true CN202633065U (en) | 2012-12-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220254751 Expired - Lifetime CN202633065U (en) | 2012-05-31 | 2012-05-31 | Current loop structure of isolation switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202633065U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356240A (en) * | 2016-11-02 | 2017-01-25 | 乐清市也为电气有限公司 | Moving and static contact terminal apparatus of disconnecting switch |
-
2012
- 2012-05-31 CN CN 201220254751 patent/CN202633065U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356240A (en) * | 2016-11-02 | 2017-01-25 | 乐清市也为电气有限公司 | Moving and static contact terminal apparatus of disconnecting switch |
| WO2018082384A1 (en) * | 2016-11-02 | 2018-05-11 | 乐清市也为电气有限公司 | Movable and stationary contact device for disconnect switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |