CN203562365U - Composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same - Google Patents
Composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same Download PDFInfo
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- CN203562365U CN203562365U CN201320686070.8U CN201320686070U CN203562365U CN 203562365 U CN203562365 U CN 203562365U CN 201320686070 U CN201320686070 U CN 201320686070U CN 203562365 U CN203562365 U CN 203562365U
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Abstract
The utility model discloses a composite contact vacuum arc-extinguishing chamber and a vacuum circuit breaker with the same. The composite contact vacuum arc-extinguishing chamber comprises a static side structure portion, a movable side structure portion and a shell structure. The static side structure portion comprises a static side arcing current conducting rod and a static side main conducting rod which is arranged in the static side arcing current conducting rod and is in clearance fit with the static side arcing current conducting rod. A static side arcing magnetic field contact and a static side annular arcing-resisting contact material are sequentially welded at the lower end of the static side arcing current conducting rod. A static side conducting contact is welded at the lower end of the static side main conducting rod. In the arcing process, the static side conducting contact is located inside the static side arcing magnetic field contact all the time, the static side main conducting rod is connected with the static side arcing current conducting rod through a static side small-diameter corrugated pipe, and the static side arcing current conducting rod is connected with a cover plate on the upper side of the arc-extinguishing chamber through a static side large-diameter corrugated pipe. A static side compression spring is installed inside the static side large-diameter corrugated pipe. According to the composite contact vacuum arc-extinguishing chamber, the problem that the magnetic structural design does not exist in the existing vacuum arc-extinguishing chamber contact design is solved.
Description
Technical field
The utility model belongs to high-voltage large current vacuum circuit-breaker technical field, is specifically related to the vacuum circuit-breaker of a kind of composite contact vacuum interrupter and application thereof.
Background technology
Along with the development of electric power system, the application of vacuum circuit-breaker in whole electric power system also developed fast.But, in the process of development, for the requirement of vacuum circuit-breaker, be also continuous raising.In some specific occasions and application that some are special, such as large rated current requires and the harsh condition of cut-offfing, traditional vacuum circuit-breaker is difficult to meet real demand, therefore needs vacuum interrupter and the relevant vacuum circuit-breaker of developing special construction to meet various demands.
At present, in traditional vacuum interrupter, the contact of labyrinth should carry rated current at closure state, needs to produce longitudinal or horizontal magnetic field in interrupting process simultaneously, makes to reduce the ablation of vacuum arc for contact surface.But two above-mentioned aspects are the relations that mutually restrict.Obtain better magnetic field, just need to optimize the structural design of contact, the structure of contact is become increasingly complex.But complicated structure of contact terminal increases the heat production of contact under nominal current conditions, to such an extent as to very difficult for the rated current that improves arc control device.
On the other hand, due to the selection of contact material in traditional arc control device, not only needing to consider the ablation of vacuum arc for contact material, also need to consider the electric conductivity of contact material under closure state simultaneously, is therefore also very difficult for the selection of contact material.If single, emphasize the wherein performance of one, so unavoidable performance on the other hand just cannot meet actual demand.
The research of special construction vacuum interrupter at present has obtained significant progress, is particularly typically the vacuum interrupter design (number of patent application 201120401528.1) that Huadong Senyan Electrical Co., Ltd., Beijing proposes.The structure of the vacuum interrupter of its design as shown in Figure 1.The shell of vacuum interrupter is by porcelain shell 201, is fixed on upper end metal sealing ring 204 on porcelain shell 201 and lower end metal sealing ring 205 and the upper end main contact 360 and the bottom end cover 210 that connect with described upper end metal sealing ring 204 and lower end metal sealing ring 205 respectively form.In porcelain shell, be provided with main shield cover 230, and the one end that is provided with conducting rod 220 on conducting rod 220 and lower conducting rod 222. in porcelain shell 201 is fixed with arcing contact 362, and the other end of upper conducting rod 220 slides through the through hole 223 of upper end main contact 360 by upper fairlead 213.Upper conducting rod 220 is connected with upper end main contact 360 by the upper bellows 260 that is arranged on its outside, and by watchband- shaped contactor 270 and 360 conductings of upper end main contact.Bellows shield cover 261 on upper bellows 260 outer setting have.One end of lower conducting rod 222 is fixed with lower end main contact 380, and the other end of lower end conducting rod 222 slides through the through hole 225 of bottom end cover 210 by lower end fairlead 215.Lower conducting rod 222 is connected with bottom end cover 210 by lower bellows 262, wherein at lower bellows 262, is outside equipped with lower bellows cover 263.In this design, upper contact head 236 consists of upper end main contact 360 and upper arcing contact 362, and lower contact 238 consists of lower end main contact 380 and lower arcing contact 382.
In the divide-shut brake process of above-mentioned vacuum interrupter, separation by main contact and arcing contact, has weakened the ablation of electric arc for contact surface.In making process, arcing contact first contacts, after continuing motion, and main contact contact, now main contact loaded current.And in separating brake process, main contact first separates, after continuing motion, arcing contact separates again, now starts arcing.
If only consider to close capacitive load, by utilizing, in above-mentioned design, arcing contact is than main contact first closure in making process, and in separating brake process, the rear characteristic separating, can reduce melting welding and the ablation of inrush phenomenon for contact really.Because the structure of contact terminal of this kind of design is simple, also can carry the rated current of increasing simultaneously.
But in actual application, above-mentioned vacuum arc extinguish chamber structure simplicity of design, does not have magnetic field structure design in contact design.Owing to lacking magnetic field structure design, in divide-shut brake process, between contact, there is no the generation in magnetic field, so can only carry out cut-offfing of rated current and overload current, be difficult to carry out cut-offfing of short circuit current.And, in above-mentioned vacuum arc extinguish chamber structure design, be also difficult to add the contact design of magnetic field structure.
Summary of the invention
The problem existing in order to solve above-mentioned prior art, the purpose of this utility model is to provide the vacuum circuit-breaker of a kind of composite contact vacuum interrupter and application thereof, has solved the problem that lacks magnetic field structure design in existing vacuum arc-extinguishing chamber contact design.
For reaching above object, the utility model adopts following technical scheme:
A kind of composite contact vacuum interrupter, comprises quiet side structure part, moving side structure part and shell structure,
Described quiet side structure part comprises quiet side arcing current conducting rod 104, be placed in quiet side arcing current conducting rod 104 and with the quiet side of quiet side arcing current conducting rod 104 matched in clearance and dominate electric pole 103, the lower end of described quiet side arcing current conducting rod 104 is welded with quiet side arcing magnetic field contact 111, the lower end of quiet side arcing magnetic field contact 111 is welded with the quiet side ring shape contact material of resistance to arcing 112, the lower end of the leading electric pole 103 of described quiet side is welded with quiet side conductive contact 113, in arcing process, described quiet side conductive contact 113 is the inside in quiet side arcing magnetic field contact 111 all the time, the leading electric pole 103 of described quiet side is connected by quiet side minor diameter bellows 101 with quiet side arcing current conducting rod 104, between quiet side arcing current conducting rod 104 and arc control device upper side cover, by quiet side major diameter bellows 108, be connected, in described quiet side major diameter bellows 108, quiet side Compress Spring 107 is installed,
Described moving side structure part comprises moved end conducting rod 117, be welded on arcing magnetic field, the moved end contact 115 of moved end conducting rod 117 upper ends, be welded on the moved end ring-type arcing contact material 114 of contact 115 upper ends, arcing magnetic field, moved end, be welded on the built-in conductive contact 116 in moved end of contact 115 inside, arcing magnetic field, moved end, under described moved end conducting rod 117 and arc control device, between side cover plate, by moving guide rod bellows 120, be connected.
Described shell structure comprises arc control device shell 119, be separately positioned on side cover plate 121 under the arc control device upper side cover 106 of arc control device shell 119 top and bottom and arc control device, be arranged on the main shield cover 118 being connected with described quiet side major diameter bellows 108 and moving guide rod bellows 120 in arc control device shell 119.
When quiet side Compress Spring 107 packs into after quiet side major diameter bellows 108, at described arc control device upper side cover 106 upsides, be placed with upside spring stop 105.
The material of described arc control device shell 119 adopts glass or pottery.
Described quiet side arcing current conducting rod 104 middle parts are welded with downside spring stop 109, on described downside spring stop 109, have groove, for fixing quiet side Compress Spring 107.
Upside conduction guide ring 102 and downside conduction guide ring 110 are equipped with respectively in top and bottom between the leading electric pole 103 of described quiet side and quiet side arcing current conducting rod 104, for On current and guided-moving direction.
Described quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end contact 115 are loop construction, cup-like structure, two electrode structures, quaternary structure or two coil configuration, in arcing process, electric current, by quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end contact 115, forms uniform longitudinal magnetic field or transverse magnetic field in the two gap.
A kind of vacuum circuit-breaker, described vacuum circuit-breaker comprises NEW TYPE OF COMPOSITE contact vacuum interrupter described above.
The function of the utility model vacuum arc-extinguishing chamber contact structure is separated.The major function of quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end contact 115 and the quiet side ring shape contact material of resistance to arcing 112 and moved end ring-type arcing contact material 114 is in the divide-shut brake process of contact, between contact gap, form longitudinal or transverse magnetic field uniformly, in order to retrain vacuum arc, so that successful drop-out current.The major function of conductive contact (113,116) is under closure state, reduces the contact resistance of contact, reduces heating, so as better On current, the rated current of increase arc control device.In design, the built-in conductive contact 116 in quiet side conductive contact 113 and moved end is in arcing process, and the inside in quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end contact 115, avoids the ablation of vacuum arc for conductive contact all the time.In addition, quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end contact 115 are stressed different with traditional contact closure state, by other spring, are produced, and therefore can avoid the structural damage for magnetic field structure contact of large contact closure power.Compared with prior art, the utlity model has following advantage:
1) structural design of the bi-bellow of quiet side structure part (quiet side minor diameter bellows and quiet side major diameter bellows), provides possibility for the structure of contact terminal of the utility model vacuum interrupter adds Magnetic Field Design; Utilized quiet side minor diameter bellows and the poor feature of quiet side major diameter bellows diameter, for quiet side Compress Spring is after vacuum interrupter vacuumizes and completes with sintering, has installed and provide convenience at normal temperatures; Like this, quiet side Compress Spring just need not heat, and its elastic performance also can not be affected; Advantageously, under such structural design basis, in vacuum interrupter, can be arranged on the contact that forms uniform magnetic field between contact gap.
2) in the design of above-mentioned structure of contact terminal, under closure state, the On current overwhelming majority is passed through conductive contact conducting, so, stressed can significantly the reducing of quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end with matching contact 115, is conducive to the design of magnetic field structure of contact terminal.
3) on the basis of the bi-bellow structural design of quiet side structure part, the contact design of answering has in contrast been proposed, the current-carrying part of the utility model contact is separation with arcing part-structure.Because conductive contact is positioned at cup-shaped contact inside, so under larger arcing current condition, vacuum arc can not cause more serious ablation to conductive contact, and can be according to the situation of practical application and arcing current, according to demand, choose the design of the cup-shaped contact of longitudinal magnetic field or transverse magnetic field, can meet like this functional characteristics separately as far as possible.
4) contact resistance of conductive contact further reduces, the rated current of raising vacuum interrupter that can be to a great extent.
5) the subsidiary movable cup-shaped of quiet side of quiet side arcing current conducting rod magnetic field contact, under the effect of quiet side Compress Spring, plays the effect of buffer in the making process of arc control device.This kind of structure can reduce the contact bounce in making process to a great extent, reduces making process and estimates to wear the ablation for arcing contact.
Accompanying drawing explanation
Fig. 1 is the floor map of prior art vacuum interrupter at gate-dividing state.
Fig. 2 is the floor map of vacuum interrupter of the present utility model at gate-dividing state.
Fig. 3 is the floor map of vacuum interrupter of the present utility model in "on" position.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figure 2, a kind of composite contact vacuum interrupter of the utility model, comprise quiet side structure part, moving side structure part and shell structure, shell structure is by arc control device shell 119, arc control device upper side cover 106, under arc control device, side cover plate 121 forms, and is provided with main shield cover 118 in arc control device shell 119.The conducting rod of quiet side structure part is comprised of the leading electric pole 103 of quiet side and quiet side arcing current conducting rod 104.The leading electric pole 103 of quiet side, in quiet side arcing current conducting rod 104 inside, is equipped with respectively upside conduction guide ring 102 and downside conduction guide ring 110 between the two at two ends.The effect of conduction guide ring is On current and guided-moving direction.Quiet side arcing current conducting rod 104 can move along the leading electric pole 103 of fixing quiet side.The leading electric pole of quiet side 103 lower ends are welded with quiet side conductive contact 113.Quiet side arcing current conducting rod 104 lower ends are welded with quiet side arcing magnetic field contact 111, and contact 111 outsides, lower end in quiet side arcing magnetic field are welded with the quiet side ring shape contact material of resistance to arcing 112.The leading electric pole 103 of quiet side is connected by quiet side minor diameter bellows 101 with quiet side arcing current conducting rod 104.So both can guarantee air-tightness, also can relative motion.Between quiet side arcing current conducting rod 104 and arc control device upper side cover 106, by quiet side major diameter bellows 108, being connected, is also the air-tightness that had both guaranteed arc control device, has met again the requirement that quiet side arcing current conducting rod 104 moves.Quiet side arcing current conducting rod 104 middle parts are also welded with downside spring stop 109.On downside spring stop 109, open groove, be used for fixing quiet side Compress Spring 107.After quiet side Compress Spring 107 packs into, at arc control device upper side cover 106 upsides, install upside spring stop 105 additional.Moving side structure part mainly comprises moved end conducting rod 117, arcing magnetic field, moved end contact 115, and moving guide rod bellows 120 forms.Conducting rod 117 upsides in moved end are welded with arcing magnetic field, moved end contact 115, and internal welding is connected to the built-in conductive contact 116 in moved end, and contact 115 tops, arcing magnetic field, moved end are welded with moved end ring-type arcing contact material 114.
Described quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end with matching contact 115 suffered power when contact closure are produced and are provided by quiet side Compress Spring 107.In the design of above-mentioned structure of contact terminal, under closure state, the On current overwhelming majority is passed through conductive contact conducting, so, stressed can significantly the reducing of quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end with matching contact 115, is conducive to the design of magnetic field structure of contact terminal.Quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end contact 115 are loop construction, cup-like structure, two electrode structures, quaternary structure or two coil configuration.In arcing process, electric current, by magnetic field contact, forms uniform longitudinal magnetic field or transverse magnetic field in contact gap.
As shown in Figure 2, the utility model NEW TYPE OF COMPOSITE contact vacuum interrupter is in gate-dividing state.The built-in conductive contact 116 in quiet side conductive contact 113 and moved end lays respectively at quiet side arcing magnetic field contact 111 and contact 115 inside, arcing magnetic field, moved end.Quiet side Compress Spring 107 is in non-energy storage state.
Describe the combined floodgate motion process of the utility model composite contact vacuum interrupter below in detail.Under the drive of breaker operation mechanism, moved end conducting rod 117 moves upward together with arcing magnetic field, moved end contact 115 and moved end ring-type arcing contact material 114.After persistent movement, moved end ring-type arcing contact material 114 takes the lead in contacting with the quiet side ring shape contact material of resistance to arcing 112.Electric current is successively through the leading electric pole 103 of quiet side, upside conduction guide ring 102 and downside conduction guide ring 110, quiet side arcing current conducting rod 104, quiet side arcing magnetic field contact 111, the quiet side ring shape contact material of resistance to arcing 112, moved end ring-type arcing contact material 114, arcing magnetic field, moved end contact 115 and moved end conducting rod 117, last conducting.After continuing motion, quiet side arcing current conducting rod 104 moves upward together with quiet side arcing magnetic field contact 111, the quiet side ring shape contact material of resistance to arcing 112 and downside spring stop 109.Quiet side Compress Spring 107 starts compressed energy-storage.When moving to after the built-in conductive contact 116 in moved end contacts with quiet side conductive contact 113, motion stops, and now arc control device are in closure state.Now electric current is mainly by moved end conducting rod 117, the built-in conductive contact 116 in moved end, quiet side conductive contact 113 and leading electric pole 103, conducting.
As shown in Figure 3, the utility model composite contact vacuum interrupter is in combined floodgate hold mode.Quiet side conductive contact 113 contacts with the built-in conductive contact 116 in moved end, and both closing pressures are provided by the spring mechanism of circuit breaker.On quiet side arcing magnetic field contact 111, the quiet side ring shape contact material of resistance to arcing 112 of welding contacts with the moved end ring-type contact material of resistance to arcing 114 of welding on arcing magnetic field, moved end contact 115, both closures keep pressure to be provided by quiet side Compress Spring 107, and now quiet side Compress Spring 107 is in energy storage state.
Describe the separating brake motion process of the utility model composite contact vacuum interrupter below in detail.Under the drive of breaker operation mechanism, moved end conducting rod 117 moves downward together with arcing magnetic field, moved end contact 115 and moved end ring-type arcing contact material 114.Due to quiet side Compress Spring 107 compressed energy-storages, so quiet side arcing current conducting rod 104 also can move downward together with quiet side arcing magnetic field contact 111, the quiet side ring shape contact material of resistance to arcing 112, downside spring stop 109 thereupon.Now, the built-in conductive contact 116 in moved end is separation with quiet side conductive contact 113.Electric current is mainly realized conducting by the leading electric pole 103 of quiet side, upside conduction guide ring 102 and downside conduction guide ring 110, quiet side arcing current conducting rod 104, quiet side arcing magnetic field contact 111, the quiet side ring shape contact material of resistance to arcing 112, moved end ring-type arcing contact material 114, arcing magnetic field, moved end contact 115 and moved end conducting rod 117.Further after motion, when quiet side arcing magnetic field contact 111 move to quiet side conductive contact 113 contact-impacts after, quiet side arcing current conducting rod 104 stops together with the motion of quiet side arcing magnetic field contact 111, the quiet side ring shape contact material of resistance to arcing 112, downside spring stop 109.Now, it is separation that the quiet side ring shape contact material of resistance to arcing 112 and moved end ring-type arcing contact material 114 start, and starts to occur vacuum arc.Under the effect of quiet side arcing magnetic field contact 111 and arcing magnetic field, moved end contact 115, produce magnetic field, evenly vacuum arc, reduces the ablation for contact material.Design attitude is continued to move in moved end, current over-zero, then arc extinction.Now arc control device are in gate-dividing state.
The utility model is not limited to above-mentioned preferred implementation, and those skilled in the art can make modifications and variations to the vacuum circuit-breaker of composite contact vacuum interrupter of the present utility model and application thereof according to instruction of the present utility model.Within all such modifications and variation all should drop on protection range of the present utility model.
Claims (8)
1. a composite contact vacuum interrupter, comprises quiet side structure part, moving side structure part and shell structure, it is characterized in that:
Described quiet side structure part comprises quiet side arcing current conducting rod (104), be placed in quiet side arcing current conducting rod (104) and with the quiet side of quiet side arcing current conducting rod (104) matched in clearance and dominate electric pole (103), the lower end of described quiet side arcing current conducting rod (104) is welded with quiet side arcing magnetic field contact (111), the lower end of quiet side arcing magnetic field contact (111) is welded with the quiet side ring shape contact material of resistance to arcing (112), the lower end of the leading electric pole (103) of described quiet side is welded with quiet side conductive contact (113), in arcing process, described quiet side conductive contact (113) is the inside in quiet side arcing magnetic field contact (111) all the time, the leading electric pole (103) of described quiet side is connected by quiet side minor diameter bellows (101) with quiet side arcing current conducting rod (104), between quiet side arcing current conducting rod (104) and arc control device upper side cover, by quiet side major diameter bellows (108), be connected, quiet side Compress Spring (107) is installed in described quiet side major diameter bellows (108),
Described moving side structure part comprises moved end conducting rod (117), be welded on arcing magnetic field, the moved end contact (115) of moved end conducting rod (117) upper end, be welded on the moved end ring-type arcing contact material (114) of arcing magnetic field, moved end contact (115) upper end, be welded on the inner built-in conductive contact in moved end (116) of arcing magnetic field, moved end contact (115), under described moved end conducting rod (117) and arc control device, between side cover plate, by moving guide rod bellows (120), be connected.
2. a kind of composite contact vacuum interrupter according to claim 1, it is characterized in that: described shell structure comprises arc control device shell (119), be separately positioned on side cover plate (121) under the arc control device upper side cover (106) of arc control device shell (119) top and bottom and arc control device, be arranged on the main shield cover (118) being connected with described quiet side major diameter bellows (108) and moving guide rod bellows (120) in arc control device shell (119).
3. a kind of composite contact vacuum interrupter according to claim 2, it is characterized in that: when quiet side Compress Spring (107) packs into after quiet side major diameter bellows (108), at described arc control device upper side cover (106) upside, be placed with upside spring stop (105).
4. a kind of composite contact vacuum interrupter according to claim 2, is characterized in that: the material of described arc control device shell (119) adopts glass or pottery.
5. a kind of composite contact vacuum interrupter according to claim 1, it is characterized in that: described quiet side arcing current conducting rod (104) middle part is welded with downside spring stop (109), on described downside spring stop (109), have groove, for fixing quiet side Compress Spring (107).
6. a kind of composite contact vacuum interrupter according to claim 1, it is characterized in that: upside conduction guide ring (102) and downside conduction guide ring (110) are equipped with respectively in the top and bottom between the leading electric pole (103) of described quiet side and quiet side arcing current conducting rod (104), for On current and guided-moving direction.
7. a kind of composite contact vacuum interrupter according to claim 1, it is characterized in that: described quiet side arcing magnetic field contact (111) and arcing magnetic field, moved end contact (115) are loop construction, cup-like structure, two electrode structures, quaternary structure or two coil configuration, in arcing process, electric current, by quiet side arcing magnetic field contact (111) and arcing magnetic field, moved end contact (115), forms uniform longitudinal magnetic field or transverse magnetic field in the two gap.
8. a vacuum circuit-breaker, is characterized in that: described vacuum circuit-breaker comprises the composite contact vacuum interrupter described in claim 1 to 7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320686070.8U CN203562365U (en) | 2013-10-31 | 2013-10-31 | Composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320686070.8U CN203562365U (en) | 2013-10-31 | 2013-10-31 | Composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same |
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| Publication Number | Publication Date |
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| CN203562365U true CN203562365U (en) | 2014-04-23 |
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|---|---|---|---|
| CN201320686070.8U Withdrawn - After Issue CN203562365U (en) | 2013-10-31 | 2013-10-31 | Composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594280A (en) * | 2013-10-31 | 2014-02-19 | 西安交通大学 | Novel composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same |
| CN107622908A (en) * | 2017-10-09 | 2018-01-23 | 中国西电电气股份有限公司 | A kind of movable double loop structure of contact terminal and vacuum interrupter |
| CN112735900A (en) * | 2020-11-27 | 2021-04-30 | 平高集团有限公司 | Vacuum arc-extinguishing chamber and vacuum circuit breaker using same |
-
2013
- 2013-10-31 CN CN201320686070.8U patent/CN203562365U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594280A (en) * | 2013-10-31 | 2014-02-19 | 西安交通大学 | Novel composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same |
| CN107622908A (en) * | 2017-10-09 | 2018-01-23 | 中国西电电气股份有限公司 | A kind of movable double loop structure of contact terminal and vacuum interrupter |
| CN112735900A (en) * | 2020-11-27 | 2021-04-30 | 平高集团有限公司 | Vacuum arc-extinguishing chamber and vacuum circuit breaker using same |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140423 Effective date of abandoning: 20150826 |
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