CN104362032B - A kind of switching device and its arc-chutes, tank body - Google Patents
A kind of switching device and its arc-chutes, tank body Download PDFInfo
- Publication number
- CN104362032B CN104362032B CN201410602218.4A CN201410602218A CN104362032B CN 104362032 B CN104362032 B CN 104362032B CN 201410602218 A CN201410602218 A CN 201410602218A CN 104362032 B CN104362032 B CN 104362032B
- Authority
- CN
- China
- Prior art keywords
- tank body
- solid insulation
- internal face
- insulation set
- arc
- 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.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
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- Circuit Breakers (AREA)
Abstract
The invention discloses a kind of switching device and its arc-chutes, tank body.The internal face of the outside wall surface of solid insulation set and tank body body, which coordinates, in arc-chutes realizes positioning, it is in to connect electric main body in solid insulation set, and solid insulation set is by between the outlet position for being located at blowout side and the internal face of tank body body, and the internal face of solid insulation set is for stopping the baffling-face for blowing out the insulating gas that goes out of side spray and making the insulating gas baffling of ejection commutate.When in use, after the insulating gas that the spout of driven power connection end ejects is to the high-voltage arc arc extinguishing in fracture, go out from the blowout side spray connect in electric main body, now not only flow velocity and temperature are still higher for insulating gas, and some metallic dusts and ionization analyte will be mingled with, now the mixed gas of high temperature and high speed will be collided on the baffling-face of fixed solid insulation sleeve, so as to avoid the impact erosion from the mixed gas that blowout side spray goes out to the internal face of tank body body.
Description
Technical field
The present invention relates to a kind of switching device and its arc-chutes, tank body.
Background technology
At present, customary insulation mode is divided into gas-insulated and fixed insulation in switchgear, and gas isolated mode is
Sulfur hexafluoride gas, nitrogen etc. are filled with arc-chutes, the mode of solid insulation is that polytetrafluoroethylene (PTFE), electricity are set in arc-chutes
Ceramic material, glass fabric, resin material etc., and gas-insulated is generally used in the insulation against ground of metal enclosed switchgear
Mode, its advantage is that the form of gas is not fixed, in particular by the switchgear of air blowing arc extinguishing, gas-insulated be even more play
The effect of arc extinguishing.But no matter gas-insulated uses sulfur hexafluoride gas or nitrogen, and its dielectric strength is below in fixed insulation
Fixed insulation material, and the insulating properties of insulating gas can by temperature in the tank body of metal enclosed switchgear, pressure,
The change of element ablation influences, and causes metal enclosed switchgear to be adopted under equal voltage class using gas isolated tank body ratio
It is big with the tank body external diameter of open type switchgear.
When metal enclosed switchgear carries out cut-offfing action, insulation is spurted to quiet power connection end from the dynamic power connection end of arc-chutes
Electric arc between blowing-out static arc contact and moving arcing contact is flowed through the cooling in fixed contact pedestal and led to by gas, insulating gas
Road --- air side of the open type on fixed contact pedestal periphery or the surface for flowing through static arc contact --- is on static arc contact periphery
The air side of open type, inject directly on and baffling is carried out on the internal face of tank body.But because of high-temperature electric arc meeting between dynamic and static connection end
Heat insulating gas so that the pressure of insulating gas rises, and insulating capacity declines, and the dynamic power connection end of arc-chutes utilizes machinery side
Formula manufactures pressure differential or carries out arc extinguishing using arc-chutes pressure itself difference, while high-temperature insulation gas is blowed into the quiet of arc-chutes
Power connection end is cooled down, so during high-temperature insulation gas cooling, the member of the quiet power connection end of gas meeting ablation arc-chutes
Part, to produce a certain amount of metallic dust and ionization analyte in the gas channel of quiet power connection end, this part dust and decomposition
Thing and the insulating gas not cooled down thoroughly will be directly blown onto the internal face of tank body from the air side on quiet power connection end, are mingled with
Dust and analyte in insulating gas can burn and corrode the tank skin of tank body, so that the internal face of tank body is uneven, weight
Then arc-chutes will be caused to puncture or discharge over the ground, so Cubicle Gas-Insulated Switchgear usually requires to go out by extension
Arc chamber static side gas channel reduces insulating gas temperature.
But, can only be in the cooling duct in the quiet power connection end of arc-chutes if extending gas channel in limited space
Increase deflection plate, but the effect of deflection plate is also limited, when the tank body internal diameter of Cubicle Gas-Insulated Switchgear contracts
It is small to a certain extent when, insulation against ground will become very sensitive, as long as there is the reduction of some insulating properties, may result in and put over the ground
Electricity or breakdown, now there is no baffle plate to influence the insulating properties of whole arc-chutes little.
And with the development of the society, the density of population is continuously increased, requirement of the modern society to the utilization rate in space also with
Raising so that the demand more and more higher that market reduces to the appearance and size of metal enclosed switchgear, such as power network requirement of invitation for bid
In, the width of 252kV three-phase split-phase metal enclosed switchgears is down to 1500mm from initial 2300mm, such as with hexafluoro
Change the breaker that sulphur gas is dielectric, if the diameter itself of arc-chutes does not reduce, the tank body of metal enclosed switchgear
Diameter has been reduced to a limit, if further reducing tank diameter, only increases tank body interior insulation gas pressure, but this
Method not only wastes gas, but also has an impact to the safety of metal enclosed switchgear, improves design pressure after all, not only
Increase material cost, and also need to the authentication of professional qualification of greater degree.
The content of the invention
Internal face is avoided to be gone out by the high-voltage switch gear that the insulating gas impact of high temperature is burnt it is an object of the invention to provide a kind of
The tank body of arc chamber, while additionally provide a kind of arc-chutes using the tank body and the switching device using the arc-chutes.
In order to realize the above object the technical scheme of tank body is as follows in the present invention：
Tank body, including for accommodating the tank body body of the relative pipe sleeve shape for connecing electric main body being assembled of dynamic and static power connection end,
It is equipped with tank body body for the solid insulation set between the internal face of the outer peripheral face for connecing electric main body and tank body body is located at,
The internal face of solid insulation set is the folding for preventing the insulating gas and baffling commutation from the blowout side spray for connecing electric main body for obstructing
Stream interface, the outside wall surface of solid insulation set are the fitting surface coordinated with the internal face of tank body body.
The temperature classification of the inwall of solid insulation set is not less than C levels.
Solid insulation set is formed by least two points of body suits, and at least two class of insulation is different in each point of body.
Two neighboring adjacent wall swelling coordinates in each point of body, the outer peripheral face swelling of outermost point of body or bonding
It is assemblied on the internal face of tank body body.
The seam axially extended is offered on the jacket wall of each point of body, seam insertion divides the ring end face at the both ends of body.
Limited step of the block at solid insulation set both ends is convexly equipped with the internal face of tank body body.
The technical scheme of arc-chutes is as follows in the present invention：
Arc-chutes, including tank body, the tank body body of tank body is pipe sleeve shape, is provided with tank body body by dynamic and static power connection end phase
Electric main body is connect to what is be assembled, the periphery for connecing electric main body is provided with the inwall that tank body body is blowed to for the insulating gas after arc extinguishing
The open type in face or the blowout side of open type, it is equipped with tank body body every being located at the outer peripheral face for connecing electric main body and tank body body
Solid insulation set between internal face, the internal face of solid insulation set are to prevent the insulating gas simultaneously for obstructing from blowout side spray
The baffling-face of baffling commutation, the outside wall surface of solid insulation set are the fitting surface coordinated with the internal face of tank body body.
The both ends of solid insulation set are stretched out from the both ends for connecing electric main body.
Solid insulation set is formed by least two points of body suits, and at least two class of insulation is different in each point of body.
The technical scheme of switching device is as follows in the present invention：
Switching device, including arc-chutes and the operating mechanism that is connected thereon, arc-chutes include tank body, the tank body of tank body
Body is pipe sleeve shape, is provided with tank body body by the relative periphery for connecing electric main body, connecing electric main body being assembled of dynamic and static power connection end
It is provided with the open type of internal face or the blowout side of open type that the insulating gas after supplying arc extinguishing blows to tank body body, tank body body
The solid insulation set being inside equipped between the internal face of the outer peripheral face for connecing electric main body and tank body body is located at, solid insulation set
Internal face is to prevent the insulating gas that and the baffling-face of baffling commutation, the outside wall surface of solid insulation set for obstructing from blowout side spray
For the fitting surface coordinated with the internal face of tank body body.
The internal face of the outside wall surface of solid insulation set and tank body body, which coordinates, in the present invention realizes positioning, to connect electric master
Body is in solid insulation set, and solid insulation set by every be located at blowout side outlet position and tank body body internal face it
Between, and the internal face of solid insulation set is for stopping that the insulating gas that blowout side spray goes out changes the insulating gas baffling of ejection
To baffling-face.When in use, after the insulating gas that the spout of driven power connection end ejects is to the high-voltage arc arc extinguishing in fracture,
Go out from the blowout side spray connect in electric main body, now not only flow velocity and temperature are still higher for insulating gas, and will be mingled with some
Metallic dust and ionization analyte, now the mixed gas of high temperature and high speed will collide on the baffling-face of fixed solid insulation sleeve,
The baffling-face will the mixed gas powerful to wind-force play a part of containment, to pass through the energy of collision effect mixed gas
Amount is released, so as to avoid the impact erosion from the mixed gas that blowout side spray goes out to the internal face of tank body body.Meanwhile Gu
Body insulation sleeve is not only able to strengthen the dielectric strength in arc-chutes, and in the baffling of the continuous colliding solid insulation sleeve of mixed gas
In the case of face, even if baffling-face becomes uneven, also it can keep complete because of the internal face of tank body body and portion residing for causing
The electric field of position keeps stable, connects electric main body so as to avoid and the tank skin of the tank body body caused by electric field change occurs in blowout side
The problem of breakdown.
Further, solid insulation set is formed by least two points of body suits, at least two insulation etc. in each point of body
Level is different, so as to improve the electric field for connecing electric main body periphery using dielectric difference of unlike material to manufacture electric capacity.
Brief description of the drawings
Fig. 1 be the present invention switching device embodiment in arc-chutes structural representation.
Embodiment
The embodiment of switching device in the present invention：As shown in figure 1, the switching device is a kind of primary cut-out, including go out
Arc chamber and the operating mechanism being connected thereon, the structure of operating mechanism belong to prior art, arc-chutes mainly by tank body, dynamic connect
Electric end 2 and quiet power connection end 4 are formed.Tank body is made up of tank body body 3 and solid insulation set 5 again, and tank body body 3 is along right and left
To the pipe sleeve body of extension, the left and right in tank body body 3 is relative with quiet power connection end 4 is coaxially disposed and forms left and right for dynamic power connection end 2
Extension connects electric main body, and the bottom side opening position of the outside wall surface in quiet power connection end 4 offers the blowout of downward opening outlet type
Side 6.Solid insulation set 5 is sleeved on the periphery for connecing electric main body, and the both ends of solid insulation set 5 are stretched out from the both ends for connecing electricity, solid
The internal face of insulation sleeve 5 is baffling-face, and merga pass is matched somebody with somebody in the outside wall surface of solid insulation set 5 and the internal face gap of tank body body 3
Side face tack coat 7 between the two is adhesively fixed together.
The left and right ends of solid insulation set 5 are stretched out from the left and right sides of quiet power connection end 4.Solid insulation set 5 is by multiple points of sets
Body coaxial package forms, and each point of set body length is consistent, and the material of each point of body is different（Such as using epoxide resin material, vulcanization
Silastic material, polytetrafluoroethylmaterial material, ceramic material etc.）, i.e. each point of body have the different classes of insulation, thus can be with
Using the dielectric divided corresponding to the unlike material of body, the shape between the tank skin of tank body body 3 and the outer peripheral face of quiet power connection end 4
Into several electric capacity, to improve the electric field between tank body body and quiet power connection end, but innermost layer to divide body to use heat-resisting etc.
Level is not less than the polytetrafluoroethylmaterial material of C levels, that is, causes the inwall of solid insulation set 5 to be not less than the insulation of C levels for temperature classification
Ablative-resistant layer.The mutual swelling of the adjacent wall of adjacent two points of bodies coordinates in solid insulation set 5, and on the jacket wall of each point of body
The seam 10 of the C-shaped axially extended is offered, seam 10 penetrates the ring end face at the both ends for dividing body, so exhausted in progress solid
During the assembling of edge set, each point of body is sequentially loaded into tank body body 3 according to order from outside to inside, and when dividing body to assemble,
First the docking wall of the both sides of seam 10 can be staggered, after body is divided to completely between two flange-interfaces of tank body body, then will
The docking wall of the both sides of seam 10 of body is divided to be docking together so as to divide body swelling to be assemblied on corresponding internal face.
Inner flange 8 is respectively arranged with the two-port of tank body body 3, inner flange 8 is formed on the internal face of tank body body
Raised spacing ring, the spacing ring block is at the both ends endface position of solid insulation set 5, to prevent solid insulation set 5 from tank
The both ends abjection of body body 3, and inner flange make it that the port of tank body body 3 is spacing necking.Tank body body 3 is metal can sheet
Body 3, the top of tank body body 3 are provided with the moved end wire hole for connecting dynamic power connection end 2 respectively and the static side outlet for connecting quiet power connection end 4
Flange is connected with insulating basin 1 respectively on hole, moved end wire hole and static side wire hole, and is opened up at the top of solid insulation set 5
The perforation that the wiring construction for having the quiet terminals 4 of confession passes, the aperture of the perforation are consistent with the aperture of static side wire hole.
Solid insulation set 5 can also use the high temperature insulating materials such as ceramic material in addition to using polytetrafluoroethylene (PTFE) material, this
Class material will not reduce insulating properties, and solid insulation set 5 can also after high temperature hot gas stream is run into because of the change of temperature
It is that multi-layer material is combined, the purpose is to improve quiet power connection end using dielectric difference of unlike material to manufacture electric capacity
The electric fields of 4 peripheries, but the baffling-face of solid insulation set 5 must be high-temperature insulation material, i.e., layer residing for baffling-face is heat-resisting etc.
Level is not less than C levels.The insulating gas of the quiet periphery of power connection end 4 can heat in high-temperature electric arc and the situation of insulating properties reduction occurs,
And the baffling-face of solid insulation set 5 is covered in the outlet side-lower of quiet power connection end 4, so that the thermal current from the discharge of quiet power connection end 4
It will be stopped by the baffling-face of solid insulation set 5, the high-temperature insulation gas for avoiding being mingled with metallic dust and ionization analyte is straight
Connect and be injected on the internal face of tank body body 3.When setting the thickness of solid insulation set 5, because the insulation of solid insulation set 5 is strong
Degree depends on its material and thickness, is that this ad hoc determines following steps to calculate the thickness of solid insulation set 5：
Calculation one：1st, according to insulating gas under the influence of thermal current, it is calculation basis to lose insulating capacity completely；
2nd, by calculating or test method, arc-chutes are known before solid insulation set 5 is not installed additional, arc-chutes can be by right
The minimum insulation distance of ground thunder and lightning and power frequency insulating test；
3rd, the minimum insulation distance in foundation step 2, the thickness of the solid insulation set 5 needed in tank body body 3 is calculated,
But because the dielectric strength of solid insulation material is different, so the solid insulation set 5 calculated according to insulation distance in step 2
Thickness can with material difference and change.
Calculation two：1st, by calculating or test method, know that arc-chutes before insulative ablative-resistant layer is not installed additional, go out
Arc chamber can pass through the insulation distance of type approval test；
2nd, the minimum insulation distance of insulative ablative-resistant layer is not installed in foundation step 1 in minimum insulation distance, with mode one additional,
It is compared, calculates the thickness of the solid insulation set 5 needed in breaker.
Therefore pass-through mode two can reduce the diameter of tank body body 3 to greatest extent.
Because all solids insulating materials is different according to production technology, also great changes have taken place for itself dielectric strength, so this
Embodiment only provides the referential data of some conventional solid insulating materials, it is assumed that the dielectric strength of sulfur hexafluoride is 1, according to meter
Calculate and test, the dielectric strength of epoxy resin is 4-6, and the dielectric strength of sulphurated siliastic is 3-4, and the dielectric strength of polytetrafluoro is
2-3, the dielectric strength of porcelain insulating materials is 5-7.
When assembling the arc-chutes, solid insulation set 5 can be loaded from any of two-port of tank body body 3, and
Solid insulation set 5 is fixed on specified location by coating adhesive linkage 7 on the internal face of tank body body 3, in solid insulation
After set 5 assembles, then dynamic power connection end 2 and quiet power connection end 4 assembled in tank body body 3, and pass through end cap 9 and insulated terminal is real
The encapsulation of existing arc-chutes.
In the above-described embodiments, solid insulation set is adhesively fixed on by adhesive linkage on the internal face of tank body body, at it
In his embodiment, solid insulation set directly can also be assemblied on the internal face of tank body body in swelling, i.e., solid insulation set is outer
The internal face of wall and tank body body is interference fitted.
In the above-described embodiments, the blowout side on quiet power connection end be in the aperture at its bottom side position, in other implementations,
The blowout side can also be opening of notch form opened up in the periphery open spaces or quiet power connection end of static contact etc..
In the above-described embodiments, at tank body body both ends by inner flange block solid insulation set, in other embodiments,
The limited step for the spacing ring type that the inner flange is formed on the internal face of tank body body can also be by the inwall of tank body body
The limited step of the forms such as the projection shape of projection on face, semi-circular replaces.
The embodiment of arc-chutes in the present invention：The structure of arc-chutes and the structure of arc-chutes in above-mentioned implementation in the present embodiment
It is identical, therefore repeat no more.
The embodiment of tank body in the present invention：The structure of tank body and the structure phase of tank body in above-described embodiment in the present embodiment
Together, therefore repeat no more.
Claims (8)
1. tank body, including for accommodating the tank body body of the relative pipe sleeve shape for connecing electric main body being assembled of dynamic and static power connection end, tank
Body body is metal can body, it is characterised in that is equipped with tank body body for every being located at the outer peripheral face and tank that connect electric main body
Solid insulation set between the internal face of body body, the internal face of solid insulation set is for obstructing from the blowout side for connecing electric main body
The baffling-face for insulating gas and the baffling commutation being blown off, the outside wall surface of solid insulation set are to coordinate with the internal face of tank body body
Fitting surface, solid insulation set forms by least two points of bodies suit, and at least two class of insulation is different in each point of body.
2. tank body according to claim 1, it is characterised in that the temperature classification of the inwall of solid insulation set is not less than C levels.
3. tank body according to claim 1, it is characterised in that two neighboring adjacent wall swelling is matched somebody with somebody in each point of body
Close, the outer peripheral face swelling of outermost point of body or adhesive asserably are on the internal face of tank body body.
4. tank body according to claim 3, it is characterised in that connecing of axially extending is offered on the jacket wall of each point of body
Seam, seam insertion divide the ring end face at the both ends of body.
5. tank body according to claim 4, it is characterised in that it is exhausted in solid to be convexly equipped with block on the internal face of tank body body
Edge covers the limited step at both ends.
6. arc-chutes, including tank body, the tank body body of tank body is the metal can body of pipe sleeve shape, be provided with tank body body by it is dynamic,
What quiet power connection end was assembled relatively connects electric main body, and the periphery for connecing electric main body blows to tank body provided with the insulating gas after supplying arc extinguishing
The open type of the internal face of body or the blowout side of open type, it is characterised in that be equipped with tank body body and meet electric master every being located at
Solid insulation set between the outer peripheral face of body and the internal face of tank body body, the internal face of solid insulation set are for obstructing from blowing
Go out the insulating gas of side spray releasing and the baffling-face of baffling commutation, the outside wall surface of solid insulation set is the internal face with tank body body
The fitting surface of cooperation, solid insulation set are formed by least two points of bodies suit, and at least two class of insulation is not in each point of body
Together.
7. arc-chutes according to claim 6, it is characterised in that stretched from the both ends for connecing electric main body at the both ends of solid insulation set
Go out.
8. switching device, including arc-chutes and the operating mechanism that is connected thereon, arc-chutes include tank body, the tank body sheet of tank body
Body is the metal can body of pipe sleeve shape, is provided with tank body body and connects electric main body by what dynamic and static power connection end was assembled relatively, connects electricity
The insulating gas that the periphery of main body is provided with after supplying arc extinguishing blows to the blowout of the open type or open type of the internal face of tank body body
Side, it is characterised in that be equipped with tank body body between the internal face of the outer peripheral face for connecing electric main body and tank body body is located at
Solid insulation set, the internal face of solid insulation set are the folding for obstructing the insulating gas released from blowout side spray and baffling commutation
Stream interface, the outside wall surface of solid insulation set are the fitting surface coordinated with the internal face of tank body body, and solid insulation set is by least two points
Body suit forms, and at least two class of insulation is different in each point of body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410602218.4A CN104362032B (en) | 2014-10-31 | 2014-10-31 | A kind of switching device and its arc-chutes, tank body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410602218.4A CN104362032B (en) | 2014-10-31 | 2014-10-31 | A kind of switching device and its arc-chutes, tank body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104362032A CN104362032A (en) | 2015-02-18 |
| CN104362032B true CN104362032B (en) | 2017-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410602218.4A Expired - Fee Related CN104362032B (en) | 2014-10-31 | 2014-10-31 | A kind of switching device and its arc-chutes, tank body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104362032B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106328435A (en) * | 2016-11-04 | 2017-01-11 | 平高集团有限公司 | Arc-extinguishing chamber, arc-extinguishing chamber tank and high-voltage switching equipment applying this arc-extinguishing chamber |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201000852Y (en) * | 2006-12-31 | 2008-01-02 | 西安西电高压开关有限责任公司 | Circuit breaker dedicated for LW24-40.5 outdoor high-voltage AC can-type SF6 |
| CN202134448U (en) * | 2011-06-29 | 2012-02-01 | 中国西电电气股份有限公司 | Combined insulating sleeve used for porcelain knob high-voltage sulfur hexafluoride circuit breaker arc extinguish chamber |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6417473B1 (en) * | 2000-07-14 | 2002-07-09 | Eaton Corporation | Method and apparatus for mounting vapor shield in vacuum interrupter and vacuum interrupter incorporating same |
| WO2006066420A1 (en) * | 2004-12-24 | 2006-06-29 | Abb Technology Ag | Generator switch having an improved switching capacity |
| FR2946181B1 (en) * | 2009-05-26 | 2011-07-01 | Areva T & D Sa | HIGH VOLTAGE CIRCUIT BREAKER WITH IMPROVED GAS EXHAUST. |
| CN201549438U (en) * | 2009-11-26 | 2010-08-11 | 浙江雷博司电器有限公司 | Epoxy-enclosed contact arm sleeve |
| CN204242925U (en) * | 2014-10-31 | 2015-04-01 | 平高集团有限公司 | Switching device and arc control device, tank body |
-
2014
- 2014-10-31 CN CN201410602218.4A patent/CN104362032B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201000852Y (en) * | 2006-12-31 | 2008-01-02 | 西安西电高压开关有限责任公司 | Circuit breaker dedicated for LW24-40.5 outdoor high-voltage AC can-type SF6 |
| CN202134448U (en) * | 2011-06-29 | 2012-02-01 | 中国西电电气股份有限公司 | Combined insulating sleeve used for porcelain knob high-voltage sulfur hexafluoride circuit breaker arc extinguish chamber |
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| Publication number | Publication date |
|---|---|
| CN104362032A (en) | 2015-02-18 |
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