CN108258610A - Three-phase solid insulation shell - Google Patents
Three-phase solid insulation shell Download PDFInfo
- Publication number
- CN108258610A CN108258610A CN201810220347.5A CN201810220347A CN108258610A CN 108258610 A CN108258610 A CN 108258610A CN 201810220347 A CN201810220347 A CN 201810220347A CN 108258610 A CN108258610 A CN 108258610A
- Authority
- CN
- China
- Prior art keywords
- insulation shell
- connecting flange
- phase solid
- solid insulation
- insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 94
- 239000007787 solid Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000002955 isolation Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 9
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052802 copper Inorganic materials 0.000 abstract description 6
- 239000010949 copper Substances 0.000 abstract description 6
- 230000005684 electric field Effects 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 2
- 238000007796 conventional method Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/01—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with resin casing
Abstract
The present invention relates to three-phase solid insulation shells, by the way that solid insulation net cabinet is split as insulation shell and inlet-outlet line component, it realizes and separates the conducting elements such as the embedded copper rod in original solid insulation housing, by flanged joint to be inserted into the insulation shell, the orderly control of electric field is realized, avoids shelf depreciation problem；Meanwhile vacuum interrupter is also removed in insulation shell, and can be mounted on insulation shell by connecting flange, the independent moulding by casting of housing is realized, simple for process, industrial yield is more preferable, and internally provided with vacuum arc-chutes are avoided, the problem on deformation of insulation shell qualitative progress；The mode of flanged joint, realize the air-tightness identical with original integrated shell and electrical performance demands, the limitation of existing conventional techniques thinking is broken, it is difficult to solve existing solid insulation housing internal electric field control, easy shelf depreciation, and machine-shaping is difficult, the problem of size and not high structure precision.
Description
Technical field
The invention belongs to high-voltage power distribution equipment technical fields, and in particular to a kind of three-phase solid of solid insulation ring main unit
Insulation shell.
Background technology
Traditional ring main unit majority is gas-insulated ring network cabinet.Using SF6 gases as the insulation of electrification in high voltage part or
Cut-off medium.It is high to the seal request of babinet and add since SF6 gases can decomposite toxic gas after cut-offfing, and easily leakage
Work complex process causes gas-insulated ring network cabinet preservation ＆ testing more complicated, needs simultaneously make-up gas of periodically hunting leak.According further to
《The Kyoto Protocol》, as gas-insulated ring network cabinet insulation or cut-off medium, SF6 gases are clearly classified as greenhouse gases
One of, it is desirable that reduce its usage amount.
For the problem, the Chinese patent of such as open (bulletin) number CN202797738U provides a kind of solid isolated vacuum
Ring main unit, it is characterized in that the outlet vacuum switch unit in inlet wire vacuum switch unit and outlet ring main unit in inlet wire ring main unit
It is mounted on cabinet by screw, silicon rubber dry type busbar is true mounted on inlet wire vacuum switch unit, outlet by screw respectively
On the bus plug of empty switch unit.It employs and all galvanic circles of vacuum switch ABC three-phases is mounted on same sealing
In pole, the volume for reducing switch and the electric field distribution for optimizing switch.
Though the prior art realizes totally-enclosed solid insulation vacuum switch, and electrical body is poured into a mould or mounted on epoxy resin
It is interior, but solid insulation housing is embedded with length and differs, and different high pressure copper bar copper rod and vacuum interrupter etc. are easily led
The problems such as field is uneven, and shelf depreciation is difficult to control is sent a telegraph, and three-phase integrated insulation shell switch uses vacuum interrupter and shell more
Body is poured into a mould together, and which is more demanding to APG technique productions, is such as occurred because a vacuum interrupter seal compression deficiency is led
Charging is caused thus the problem of entire switch case is all scrapped；The switch case after vacuum interrupter has been pre-installed simultaneously due to increasing
Vacuum interrupter own wt is added, housing is caused to be susceptible to deformation in rear solidifying and setting and causes movable end of arc extinguishing chamber vertical
Offset, the setting tooling for needing production quantity numerous are shaped.
Invention content
The present invention is intended to provide a kind of three-phase solid insulation shell, to solve in existing switch case or solid insulation housing
Vacuum interrupter is put, the problem of own wt is big, and form accuracy is low, processing difficulties.
Concrete scheme is as follows：A kind of three-phase solid insulation shell, including a hollow insulation shell, the insulation shell it is upper
Lower both ends are respectively equipped with connecting flange and lower connecting flange, and connecting flange and lower connecting flange are equipped with to run through and be somebody's turn to do on this
The through hole of insulation shell wall surface；
On this there are three connecting flanges, for connecting the enterprising thread casing of three-phase；In the insulation shell, adjacent upper connection
Isolation board is formed between flange, for the enterprising thread casing of three-phase is isolated.
Further, which includes main part and ceiling plate portion, connecting flange and lower connecting flange point on this
Not She Yu the main part upper and lower ends, a side of the main part is equipped with an opening, which is detachably set on the opening
On, to form the insulation shell of the closing.
Further, sealing ring is further included, which is circumferentially set in the opening, which covers and compress this
Sealing ring, to realize the hermetically closed of the insulation shell.
Further, the wall surface of the insulation shell towards the insulation shell indent and extends, to form the isolation board；It should be every
It is u-shaped from the section of plate, have towards groove open outside the insulation shell.
Further, which connects the upper end of the insulation shell and an at least side, the groove top and side
End is open towards insulation shell outside by the upper end of the insulation shell and side respectively；Connecting flange is provided close on this
The position of the insulation shell side.
Further, which is equipped with housing explosion proof window and operation shaft mounting hole, the operation shaft mounting hole are horizontal
Run through the insulation shell to ground.
Further, on the insulation shell, the position that connecting flange and the lower connecting flange correspond to through hole on this is set
The oriented widened jack of outside diameter, and the side wall of each jack is equipped with sealed insulation silica gel.
Further technical solution is the present invention：The insulation shell is formed for poured with epoxy resin.
The three-phase solid insulation shell of the present invention, by the way that solid insulation net cabinet is split as insulation shell and inlet-outlet line group
Part realizes and separates the conducting elements such as the embedded copper rod in original solid insulation housing, exhausted to be inserted into this by flanged joint
In edge housing, the orderly control of electric field is realized, avoids shelf depreciation problem；Meanwhile vacuum interrupter is also removed to insulation
It in housing, and can be mounted on insulation shell by connecting flange, realize the independent moulding by casting of housing, it is simple for process,
Its industrial yield is more preferable, and avoids internally provided with vacuum arc-chutes, the problem on deformation of insulation shell qualitative progress；The side of flanged joint
Formula realizes the air-tightness identical with original integrated shell and electrical performance demands, has broken existing conventional techniques thinking
Limitation, it is difficult to solve the control of existing solid insulation housing internal electric field, easy shelf depreciation, and machine-shaping is difficult, size and knot
The problem of structure precision is not high.
Description of the drawings
Fig. 1 shows one structure diagram of main part angle of three-phase solid insulation shell of the embodiment of the present invention；
Fig. 2 shows two structure diagrams of main part angle of three-phase solid insulation shell of the embodiment of the present invention；
Fig. 3 shows three structure diagram of main part angle of three-phase solid insulation shell of the embodiment of the present invention；
Fig. 4 shows that the embodiment of the present invention is applied to solid insulation ring main unit structure diagram.
Specific embodiment
To further illustrate each embodiment, the present invention is provided with attached drawing.These attached drawings are that the invention discloses one of content
Point, mainly to illustrate embodiment, and the associated description of specification can be coordinated to explain the operation principles of embodiment.Cooperation ginseng
These contents are examined, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention.In figure
Component be not necessarily to scale, and similar element numbers are conventionally used to indicate similar component.
In conjunction with the drawings and specific embodiments, the present invention is further described.
It is hollow exhausted including one this embodiment offers a kind of three-phase solid insulation shell with reference to shown in Fig. 1 to Fig. 3
Edge housing, in this embodiment, the insulation shell include main part 1 and ceiling plate portion 10 (see components of the Fig. 4 marked as 10).
In this embodiment, the main part 1 be rectangle closing housing, in front of side be equipped with one opening, the cover board
Portion 10 is tablet, is detachably set in the opening of the main part 1 by screw, to form the insulation shell of the closing；It and should
Sealing ring (not shown) is additionally provided on the outer of opening, around the upper edge of high opening, equipped with fixing groove 13, the sealing ring
It is set in the fixing groove 13 around ground, then the ceiling plate portion 10 covers and compresses the sealing ring, to realize the airtight of the insulation shell
Property closing, avoid water, steam or sundries into the insulation shell.
The upper and lower ends of the main part 1 are respectively equipped with connecting flange 2 and lower connecting flange 3, in this embodiment, should
There are three upper connecting flanges 2, and straight line is evenly distributed in left-right direction, corresponding, and the lower section of each connecting flange 2 on this is equipped with
Connecting flange.Be equipped with the through hole through the insulation shell wall surface on connecting flange 2 and lower connecting flange 3 on this, with
In importing electric conductor.
In this embodiment, three connecting flanges 2 on this are used to connect the enterprising thread casing of three-phase (see Fig. 4 marked as 5
Part), which is fixed on by way of flanged joint on the upper surface of main part 1, and by enterprising thread casing
Interior conductor is inserted by the through hole of upper connecting flange 2 in insulation shell；
To realize adjacent a phase line electrical isolation, in the insulation shell, i.e., in the main part 1, adjacent upper company
Isolation board 4 is formed between acting flange 2, the molding mode of the isolation board 4 is：
It is positioned against internal recessed at the upper end wall surface two of the main part 1 and extends, to form the isolation board 4, and then should
The section of isolation board 4 is u-shaped, and isolation board 4 is made to have towards groove 40 open outside the insulation shell, and then form two
Layer baffle and one layer of air gap realize the electrical isolation of circuit between adjacent upper connecting flange 2；Meanwhile the isolation board 4 is grown
Rear and front end connects the rear side end of the main part 1 and ceiling plate portion 10 respectively on degree direction, in the rear side end, the isolation board 4
40 side of groove penetrates through the rear side end of the insulation shell, and two wall surfaces are connected on the wall surface of rear side end, and then towards the insulation shell
It is open outside body；At ceiling plate portion 1, which contacts on the wall surface of the ceiling plate portion 10；Meanwhile for realize it is best every
From effect, connecting flange 2 is provided at close to the position of the insulation shell rear side end on this, i.e., at the ceiling plate portion 10, at this
The electrical isolation best results of isolation board 4.
The main part 1 of the insulation shell is equipped with housing explosion proof window 11 and operation shaft mounting hole 12, the housing explosion proof window
Set on the position of the corresponding isolation board 4, for the compatible function of realizing internal circuit connection state and run through window, and the position is
It is easier to that impact explosion position occurs；The operation shaft mounting hole 12 passes through 1 liang of the main part laterally through the insulation shell
The wall surface of side.
In this embodiment, to realize best airtight and electrical isolation effect, on the main part 1 of the insulation shell,
Connecting flange 2 and the lower connecting flange 3 correspond to the position of through hole on this, are equipped with to the widened jack of outside diameter, excellent
Choosing, which is round table-like hole, and sealed insulation silica gel is circumferentially equipped on the side wall of each jack, for method
It is closed after orchid connection.In this embodiment, for epoxy resin, integrally cast is formed the main part 1 of the insulation shell, the cover board
Portion 10 is also made of poured with epoxy resin molding.
Conductor and vacuum interrupter are connected in conjunction with shown in Fig. 4, being integrated in three enterprising thread casings 5, it is then each
The enterprising thread casing 5 is installed on by way of 2 flanged joint of connecting flange on one on main part 1, and be conducted to the master respectively
In space inside body portion 1；Meanwhile three lower joint sleeve pipes 6 are installed respectively by three lower 3 flanged joints of connecting flange
In the space on main part 1, being conducted in the main part 1, installation is realized；Finally, main part 1 is covered in by ceiling plate portion 10
Opening on, realize the closed of the insulation shell.
The three-phase solid insulation shell of the embodiment, eliminates in all switch cases, should be embedded in epoxy inner
The opposite sex inserts such as high pressure copper rod, copper bar, is then installed, technology difficulty is greatly lowered by flange connection；Using three-phase
Integral manner, it is ensured that be not in horizontal-shift problem after installation vacuum interrupter；Meanwhile vacuum interrupter is detached from switch housing
Body, forming a separate part, flange is installed again, and the enterprising thread casing handling ease of band vacuum interrupter being detached from after housing does not have
The housing simple processing of vacuum interrupter, sizing are simple.
Although specifically showing and describing the present invention with reference to preferred embodiment, those skilled in the art should be bright
In vain, it is not departing from the spirit and scope of the present invention that the appended claims are limited, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (8)
1. a kind of three-phase solid insulation shell, including a hollow insulation shell, it is characterised in that：
The upper and lower ends of the insulation shell are respectively equipped with connecting flange and lower connecting flange, connecting flange and lower company on this
Acting flange is equipped with the through hole through the insulation shell wall surface；
On this there are three connecting flanges, for connecting the enterprising thread casing of three-phase；In the insulation shell, adjacent upper connecting flange
Between form isolation board, for be isolated the enterprising thread casing of three-phase.
2. three-phase solid insulation shell according to claim 1, it is characterised in that：The insulation shell include main part and
Ceiling plate portion, connecting flange and lower connecting flange are respectively arranged on the upper and lower ends of the main part, a side of the main part on this
Equipped with an opening, which is detachably set in the opening, to form the insulation shell of closing.
3. three-phase solid insulation shell according to claim 2, it is characterised in that：Sealing ring is further included, the sealing ring
It is set in the opening around ground, which covers and compress the sealing ring, to realize the hermetically closed of the insulation shell.
4. three-phase solid insulation shell according to claim 1, it is characterised in that：The wall surface of the insulation shell is exhausted towards this
Edge housing indent simultaneously extends, to form the isolation board；The section of the isolation board is u-shaped, has towards outside the insulation shell
Open groove.
5. three-phase solid insulation shell according to claim 4, it is characterised in that：The isolation board connects the insulation shell
Upper end and at least a side, the groove top and side are exhausted towards this by the upper end of the insulation shell and side respectively
Edge hull outside opens；Connecting flange is provided close to the position of the insulation shell side on this.
6. three-phase solid insulation shell according to claim 1, it is characterised in that：It is explosion-proof that the insulation shell is equipped with housing
Window and operation shaft mounting hole, the operation shaft mounting hole is laterally through the insulation shell.
7. three-phase solid insulation shell according to claim 1, it is characterised in that：On the insulation shell, connection method on this
The position that the blue and lower connecting flange corresponds to through hole is equipped with to the widened jack of outside diameter, and on the side wall of each jack
Equipped with sealed insulation silica gel.
8. the three-phase solid insulation shell according to claim 1-7 any claims, it is characterised in that：The insulation shell
It is formed for poured with epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810220347.5A CN108258610A (en) | 2018-03-16 | 2018-03-16 | Three-phase solid insulation shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810220347.5A CN108258610A (en) | 2018-03-16 | 2018-03-16 | Three-phase solid insulation shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108258610A true CN108258610A (en) | 2018-07-06 |
Family
ID=62746640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810220347.5A Pending CN108258610A (en) | 2018-03-16 | 2018-03-16 | Three-phase solid insulation shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108258610A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109559932A (en) * | 2018-12-14 | 2019-04-02 | 北京双杰电气股份有限公司 | Solid insulation cylinder and the solid insulated switchgear for using it |
| CN110970272A (en) * | 2019-11-30 | 2020-04-07 | 河南平高通用电气有限公司 | Circuit breaker and gas insulated switchgear using same |
| CN110970271A (en) * | 2019-11-30 | 2020-04-07 | 河南平高通用电气有限公司 | Circuit breaker and gas insulated switchgear using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10178714A (en) * | 1996-12-19 | 1998-06-30 | Meidensha Corp | Interrupter |
| WO2003063314A2 (en) * | 2002-01-26 | 2003-07-31 | Abb T & D Technologies Ltd. | Gas-insulated high voltage switchgear |
| EP2254209A1 (en) * | 2009-05-20 | 2010-11-24 | ABB Technology AG | Pluggable primary output connections between two modules of a gas-isolated high voltage switching assembly |
| DE102009022103A1 (en) * | 2009-05-20 | 2010-11-25 | Abb Technology Ag | High voltage switchgear housing for gas-insulated high voltage switchgear, has two connecting openings for forming connecting group of connecting openings, and are formed for supporting separate phase conductor |
| CN203135300U (en) * | 2013-04-08 | 2013-08-14 | 深圳市金博联电力技术有限公司 | Fully sealed all-solid insulation ring main unit |
| CN103414116A (en) * | 2013-08-30 | 2013-11-27 | 北京清畅电力技术股份有限公司 | 12KV solid-insulated ring main unit |
| CN203367841U (en) * | 2013-06-26 | 2013-12-25 | 国家电网公司 | Solid insulating ring main unit |
| CN203721613U (en) * | 2014-03-10 | 2014-07-16 | 江苏迅隆科技发展有限公司 | Aluminum alloy shell for high voltage and ultra-high-voltage gas insulated switchgears |
| CN107332180A (en) * | 2017-07-14 | 2017-11-07 | 河南平高电气股份有限公司 | A kind of GIS device and its three-phase non-segregated bus cylinder |
| CN206922309U (en) * | 2017-06-23 | 2018-01-23 | 浙江博为电气有限公司 | A kind of solid insulation cabinet easy to use |
| CN107732754A (en) * | 2017-11-27 | 2018-02-23 | 上海天灵开关厂有限公司 | A kind of gas-filling cabinet with bus inserting function |
| CN207910346U (en) * | 2018-03-16 | 2018-09-25 | 厦门业盛电气有限公司 | Three-phase solid insulation shell |
-
2018
- 2018-03-16 CN CN201810220347.5A patent/CN108258610A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10178714A (en) * | 1996-12-19 | 1998-06-30 | Meidensha Corp | Interrupter |
| WO2003063314A2 (en) * | 2002-01-26 | 2003-07-31 | Abb T & D Technologies Ltd. | Gas-insulated high voltage switchgear |
| EP2254209A1 (en) * | 2009-05-20 | 2010-11-24 | ABB Technology AG | Pluggable primary output connections between two modules of a gas-isolated high voltage switching assembly |
| DE102009022103A1 (en) * | 2009-05-20 | 2010-11-25 | Abb Technology Ag | High voltage switchgear housing for gas-insulated high voltage switchgear, has two connecting openings for forming connecting group of connecting openings, and are formed for supporting separate phase conductor |
| CN203135300U (en) * | 2013-04-08 | 2013-08-14 | 深圳市金博联电力技术有限公司 | Fully sealed all-solid insulation ring main unit |
| CN203367841U (en) * | 2013-06-26 | 2013-12-25 | 国家电网公司 | Solid insulating ring main unit |
| CN103414116A (en) * | 2013-08-30 | 2013-11-27 | 北京清畅电力技术股份有限公司 | 12KV solid-insulated ring main unit |
| CN203721613U (en) * | 2014-03-10 | 2014-07-16 | 江苏迅隆科技发展有限公司 | Aluminum alloy shell for high voltage and ultra-high-voltage gas insulated switchgears |
| CN206922309U (en) * | 2017-06-23 | 2018-01-23 | 浙江博为电气有限公司 | A kind of solid insulation cabinet easy to use |
| CN107332180A (en) * | 2017-07-14 | 2017-11-07 | 河南平高电气股份有限公司 | A kind of GIS device and its three-phase non-segregated bus cylinder |
| CN107732754A (en) * | 2017-11-27 | 2018-02-23 | 上海天灵开关厂有限公司 | A kind of gas-filling cabinet with bus inserting function |
| CN207910346U (en) * | 2018-03-16 | 2018-09-25 | 厦门业盛电气有限公司 | Three-phase solid insulation shell |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109559932A (en) * | 2018-12-14 | 2019-04-02 | 北京双杰电气股份有限公司 | Solid insulation cylinder and the solid insulated switchgear for using it |
| CN109559932B (en) * | 2018-12-14 | 2020-08-04 | 北京双杰电气股份有限公司 | Solid insulation cylinder and solid insulation circuit breaker using same |
| CN110970272A (en) * | 2019-11-30 | 2020-04-07 | 河南平高通用电气有限公司 | Circuit breaker and gas insulated switchgear using same |
| CN110970271A (en) * | 2019-11-30 | 2020-04-07 | 河南平高通用电气有限公司 | Circuit breaker and gas insulated switchgear using same |
| CN110970272B (en) * | 2019-11-30 | 2021-08-06 | 河南平高通用电气有限公司 | Circuit breaker and gas insulated switchgear using same |
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