CN101000837B - High voltage circuit breaker - Google Patents
High voltage circuit breaker Download PDFInfo
- Publication number
- CN101000837B CN101000837B CN2006100173453A CN200610017345A CN101000837B CN 101000837 B CN101000837 B CN 101000837B CN 2006100173453 A CN2006100173453 A CN 2006100173453A CN 200610017345 A CN200610017345 A CN 200610017345A CN 101000837 B CN101000837 B CN 101000837B
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- contact
- jet pipe
- circuit breaker
- forearc
- big conductor
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- 239000004020 conductor Substances 0.000 claims abstract description 36
- 230000003068 static effect Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000007789 gas Substances 0.000 description 23
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 11
- 229960000909 sulfur hexafluoride Drugs 0.000 description 11
- 229910018503 SF6 Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000010891 electric arc Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Circuit Breakers (AREA)
Abstract
A high voltage circuit breaker is prepared as arranging static contact in large conductor with guiding sheath and setting voltage-sharing cover with permanent contact on large conductor, setting active contact in air cylinder, setting active contact ring at end near to static contact on air cylinder, contacting one end of jet nozzle to internal wall of active contact and another end to guiding sheath, coordinating front part of conductor with internal wall of air cylinder through contact finger and setting value disc in conductor.
Description
Technical field
The present invention relates to power equipment, particularly a kind of primary cut-out that under-40 ℃ of ambient temperatures, still can cut-off the 50kA short circuit current.
Background technology
Primary cut-out mainly is to be used for suiting rated current and fault current; conversion line; realization is to the equipment of the control and the protection of transmission line, and it is important control of electric power system and protection equipment, plays a part very important to the power system security reliability service.
Sulfur hexafluoride breaker is widely used in electric power system already, its specified sulphur hexafluoride the blowing pressure of this series products of the 252kV electric pressure of using is essentially 0.6MPa at present, the short circuit current connecting-disconnecting function is generally 50kA, this series products is not less than-30 ℃ area and can uses preferably in ambient temperature, but when ambient temperature is lower than-30 ℃, sulphur hexafluoride is with partial liquefaction, and effective pressure will progressively reduce, and insulating capacity and connecting-disconnecting function also will decrease.When ambient temperature was reduced to-40 ℃, its pressure only had 0.344MPa.Therefore, this product can not satisfy the needs of extremely frigid zones.
For satisfying the urgent need of extremely frigid zones power consumer, high-voltage switch gear manufactory had once taked following measures: the one, and heating, promptly in circuit breaker sulfur hexafluoride air cell inside or the outer setting heater, and control automatically by intelligent temperature controller, when ambient temperature is reduced to subzero, thermostat is connected heater power source and is heated making sulfur hexafluoride air cell, thereby makes the sulfur hexafluoride air cell temperature remain at the connecting-disconnecting function that keeps 50kA more than-30 ℃.The 2nd, adopt mist: SF
6+ N
2Or SF
6+ CF
4, preceding a kind of method is very undesirable for the result of use of outdoor porcelain knob breaker, because if heater is placed on the sulfur hexafluoride air cell outside, heats will be very poor so; If heater is placed on sulfur hexafluoride air cell inside, almost be to change in case heater damages, so this method seldom adopts.Though a kind of method in back can solve a part of problem, because the gas of two kinds of high pressures mixes, its leak rate difference has brought many inconvenience for use, detection, the management of product, therefore can not be promoted.
Summary of the invention
The purpose of this invention is to provide a kind of can be under-40 ℃ of ambient temperatures, the primary cut-out that can normally use still.
The present invention seeks to be achieved through the following technical solutions: this circuit breaker comprises static contact head device, jet pipe and trigger device; Fixed contact in static contact head device is positioned at fixing big conductor, near trigger device one end grading shield is housed at fixing big conductor, and permanent contact is arranged in it; The moving contact of trigger device is arranged in cylinder, has open-work on the chamber wall of moving contact, and access ramp is arranged on the moving contact, and this access ramp communicates the interior chamber of air chamber and jet pipe; Cylinder is equipped with the movable contact ring near static contact head device one end, and the current collector that is assemblied on the moving contact is arranged in the movable contact ring; One end of jet pipe contacts with the inwall of movable contact ring; On the fixing big conductor inwall in static contact head device fairlead is housed; Fairlead limit jet pipe outside fixed contact by moving axially; The current collector periphery is equipped with auxiliary nozzle; Match by band shape fingertip with the inwall of cylinder in the front portion of big conductor, the valve plate that the piston pressurized air chamber is communicated with the air chamber that is formed by big conductor is housed in the big conductor; Open-work on the moving contact is positioned at cylinder; The other end of jet pipe contacts with fairlead.
One end of described jet pipe is the forearc area, the other end is the water conservancy diversion district, the centre is an expansion regions, there is bulge loop the end of forearc area outer wall, jet pipe one end is that the outer wall by bulge loop contacts with the inwall of movable contact ring, the end of water conservancy diversion district outer wall is fluted, and annular ring is housed in the groove, and the other end of jet pipe is closely to contact with fairlead by annular ring; The inner chamber of forearc area becomes horn-like, and the position internal diameter minimum adjacent with expansion regions.
In big conductor, lead is housed also, and is contained in the annular valve plate on the lead, on the valve plate, have two through holes at least.
There is cannelure the front portion of conductor greatly, and band shape fingertip is housed in the cannelure, and big conductor closely contacts with the inwall of cylinder mutually by the fingertip that is equipped with in the cannelure.
The internal diameter at position is greater than 1～2 millimeter of the external diameter of fixed contact in the forearc area cavity of jet pipe, in the expansion regions cavity near the internal diameter of forearc area end less than internal diameter near water conservancy diversion district end.
The trumpet-shaped inner chamber in forearc area is to be inwardly protruded cambered surface near expansion regions one end, inwardly recessed slick and sly connection of cambered surface in this cambered surface and this inner chamber, inside recessed cambered surface again with this inner chamber in gradient be that 3～5 ° taper inner chamber is connected;
The end shape of grading shield is the annular sphere of projection.
Because the present invention a kind ofly comprises that two are arranged on a contact circuit breaker between fracture, it is to make full use of arc energy to come arc blow-out, blow-out with the raising cylinder pressure of calming the anger; Therefore the arc control device gas pressure is 0.4MPa under-40 ℃ of ambient temperatures, connecting-disconnecting function reaches 50kA, even if therefore also can normally use at this circuit breaker of the extremely frigid zones of-40 ℃ of ambient temperatures, in addition because this product makes its specified sulphur hexafluoride pressure have only 0.4MPa, compare with the 0.6MPa product, both are under identical ambient temperature conditions, the use amount of sulfur hexafluoride gas and discharge capacity will reduce 1/3rd, have reached the effect of not only energy-conservation but also environmental protection.
Description of drawings
Fig. 1 is the cutaway view that is in closure state of the present invention;
Fig. 2 is the cutaway view of jet pipe among the present invention;
Fig. 3 is the cutaway view of the another kind of structure of jet pipe among the present invention;
Fig. 4 is when steam vent does not go out piston in the separating brake process of the present invention and the cutaway view schematic diagram of heat transfer process;
Fig. 5 is the cross-sectional schematic of gas flow direction when steam vent has gone out piston and electric arc and soon extinguishes in the separating brake process of the present invention.
Embodiment
Embodiment: this circuit breaker comprises static contact head device, jet pipe and trigger device; Fixed contact 1 in static contact head device is positioned at fixing big conductor 22, near trigger device one end grading shield 26 is housed at fixing big conductor 22, permanent contact 6 is arranged in it, grading shield 26 can be assemblied on the fixing permanent contact 6, but both have certain interval, on fixing big conductor 22 inwalls fairlead 20 are housed;
The moving contact 8 of trigger device is arranged in cylinder 16, and cylinder is equipped with movable contact ring 14 near static contact head device one end, and the current collector 2 and the auxiliary nozzle 7 that are assemblied on the moving contact 8 are arranged in the movable contact ring 14, and current collector 2 and moving contact 8 are hollow structure; Current collector 2 can lean on screw fit to moving contact 8, and auxiliary nozzle 7 can lean on screw fit to current collector 2, and an end face of auxiliary nozzle 7 contacts with a face of moving contact.
One end of jet pipe 4 is positioned at movable contact ring 14, and this end outer wall contacts with movable contact ring 14 inwalls; And the sealing of an end of cylinder 16, this end of jet pipe 4 is forearc area 4a, and there is bulge loop 4d the end of forearc area outer wall, and an end of jet pipe 4 then is to lean on the outer wall of bulge loop 4d to contact with the inwall of movable contact ring 14; The other end of jet pipe 4 is water conservancy diversion district 4c, the end fluted 4 of water conservancy diversion district outer wall ", groove 4 " in annular ring 21 is housed, the other end of jet pipe 4 then is closely to contact with fairlead 20 by annular ring 21; And fairlead 20 limits jet pipe 4 and moves vertically in fixed contact 1 outside.The inner chamber 9 of jet pipe 4 " mid portion is expansion regions 4b; in the expansion regions 4b cavity near the internal diameter of forearc area 4a end less than internal diameter near water conservancy diversion district 4c end; the inner chamber of forearc area 4a becomes horn-like; the Q position internal diameter minimum adjacent with expansion regions 4b, but its internal diameter is greater than 1～5 millimeter of the external diameter of fixed contact 1;
The other end outer wall of jet pipe 4 also can be set to a projection, and the annular ring that insulating material is made is housed on projection, is closely contacted with fairlead 20 by the annular ring on the projection.
The structure of jet pipe 4 also can adopt the structure as Fig. 3, and promptly the inner chamber of expansion regions 4b and water conservancy diversion district 4c is the cavity of same tapering in the jet pipe 4, and the radial section of this two positions cavity is long-pending is increased gradually to water conservancy diversion district 4c by expansion regions 4b.
Have open-work a on the chamber wall of the moving contact 8 of trigger device, open-work a is positioned at cylinder 16; Formed piston pressurized air chamber 9 between the outer wall of moving contact 8 and cylinder 16 inwalls, also had access ramp 9 ' on the moving contact 8, it makes the interior chamber 9 of piston pressurized air chamber 9 and jet pipe 4 " communicate; Match with the inwall of cylinder 16 in the front portion of big conductor 24, first valve plate 18 that can make piston pressurized air chamber 9 and be communicated by the air chamber 15 that forms than big conductor 24 is housed in the big conductor 24.In the big conductor 24 lead 13 is housed also, and is contained on annular valve plate 12, the first valve plates 18 on the lead 13, have two through holes 17 at least, these through holes can be the through hole of regular shape, also can be special-shaped through hole, on the through hole 17 check-valves are housed;
There is cannelure 23 ' front portion of conductor 24 greatly, and band shape fingertip 23 is housed in the cannelure 23 ', and big conductor 24 closely contacts with the inwall of cylinder 16 mutually by the fingertip 23 that is equipped with in the cannelure 23 '.
4a trumpet-shaped inner chamber in forearc area is to be the cambered surface of all inwardly protrudings near expansion regions 4b one end, inwardly recessed slick and sly connection of all cambered surfaces in this cambered surface and the trumpet-shaped inner chamber of forearc area 4a, inside recessed all cambered surfaces are that 3-5 ° taper inner chamber is connected with gradient again; So that forearc area 4a is forming a little local trunnion 4 ' near the Q position.
For grading shield 26 when the electrion also can keep smooth, its end shape be set to the annular sphere cover 26 of projection '.
In order to guarantee fine contact of movable contact ring 14 outer surfaces and fixing permanent contact 6 inner surfaces.On 6 outer surfaces of fixing permanent contact ring-shaped cylinder shape spring 25 is housed; Centre position at fixing permanent contact 6 inner surfaces is equipped with retainer ring 27, is used to limit the fixing permanent contact 6 of a plurality of lobe shapes and is out of shape to the center; Fixing permanent contact 6 can adopt screw connecting mode that it is assemblied on fixing 22 1 end faces of big conductor, and makes their tight contacts.Fixed contact 1 afterbody is fixed on the fixing big conductor 22 by screw thread, and firmly contact with it.
Grading shield 26 aluminium manufacturings,
Fixed contact 1 is formed by resistant to elevated temperatures metal material and electric conducting material sintering.
Institute's filling medium is a sulphur hexafluoride in this circuit breaker.
The behaviour in service of this circuit breaker and gas flow situation are as follows:
Fashionable when this circuit breaker closing, fixed contact 1 passes the trunnion 4 ' of jet pipe 4, and the trunnion 7 ' of auxiliary nozzle 7 enters the hollow current collector 2 that AX vertically is positioned at the trunnion upstream, as shown in Figure 1.
The expansion regions 4b of trunnion 7 ' and jet pipe 4 is for limiting a space that is used to disconnect electric arc, and this electric arc is in discharge between fixed contact 1 and current collector 2 during the cut-off breaker.This space as shown in Figures 4 and 5.
This circuit breaker space is by being positioned at the access ramp 9 ' and air chamber 9 on piston pressurized air chamber 9 and the moving contact 8 " be connected.
When fixed contact 1 separates with current collector 2 and moment of producing electric arc, contact dielectric gas herein is pressurized because of being heated.Gas after being heated is by piston pressurized air chamber 9 ", the hollow channel by access ramp 9 ' and current collector 2 flows to piston pressurized air chamber 9.As shown in Figure 4.Along with moving contact 8 moves along axial AX, this pressure rises and produces one from the thermal current of piston pressurized air chamber 9 to the dielectric gas in circuit breaker space.When this circuit breaker disconnects certain distance, be kept at the pressurized and process passage 9 of dielectric gas in the piston pressurized air chamber 9 " space of opening circuit of backflowing to.By the heating of electric arc, increase the pressure in the air chamber, the flow rate that enters the dielectric gas in the space of opening circuit with increase simultaneously to dielectric gas.When the mobile fixed contact 1 that makes of auxiliary nozzle 7 withdraws from from trunnion 7 ', at piston pressurized air chamber 9 " pressure thermal medium gas flow in the fixing big conductor 22 shape chambeies by the passage around the fixed contact 1.Moving contact 8 continues to move along axial AX, and fixed contact 1 also moves along axial AX with respect to moving contact 8, and trunnion 4 ' passage is opened, and is kept at the trunnion 4 ' that piston pressurized air chamber 9 interior thermal medium gases pass jet pipe 4, blows the outage arc and disconnects big electric current.Subsequently, piston pressurized air chamber 9 heated pressed gas are discharged into air chamber 15 by the hollow channel of contact 2 by elongated hole 8 '.As shown in Figure 5.
Circuit breaker closing is fashionable, and it is big that the space of pressurized air chamber 9 becomes, and the pressure of dielectric gas reduces, and 15 two air chambers of piston pressurized air chamber 9 and air chamber form a pressure differential, and the pressure of air chamber 15 is greater than the pressure of piston pressurized air chamber 9.The dielectric gas of air chamber 15 promotes annular valve plate 12 having under lead 13 guide effects, moves a certain distance along axial AX; Dielectric gas flow into piston pressurized air chamber 9 by first valve plate 18 that the irregularly-shaped hole passage is arranged.Simultaneously, the gas between fixed contact 1 and the current collector 2 is by air chamber 9 ", the hollow channel by access ramp 9 ' and current collector 2 flows to piston pressurized air chamber 9.Fixed contact 1 is with after current collector 2 contacts, movable contact ring 14 with permanent contact 6 is also very fast contacts, electric current is close under certain pressure on cylinder 16 inwalls of handling through surface treatment and is slided by the band shape fingertip 23 on the big conductor 24, sets up big current path at movable contact ring 14 and permanent contact 6.
Shown in Fig. 4 and Fig. 5 the position in, being blown into the gas that disconnects the space comprises by from the cold air of air chamber 9 with by air chamber 9 "; by the hollow channel of access ramp 9 ' and current collector 2, flow to the admixture of gas that the hot gas of piston pressurized air chamber 9 is formed.By this set, the temperature of dielectric gas raises and the pressure rising, thereby has further strengthened the circuit breaker capacity.
The line of band small arrow is represented heat transferred and gas flow direction among Fig. 4 and Fig. 5.
Claims (7)
1. a primary cut-out comprises static contact head device, jet pipe and trigger device; Fixed contact in static contact head device (1) is positioned at fixing big conductor (22), near trigger device one end grading shield (26) is housed at fixing big conductor (22), and permanent contact (6) is arranged in it; The moving contact of trigger device (8) is arranged in cylinder (16), has open-work (a) on the chamber wall of moving contact (8), and moving contact has access ramp (9 ') on (8), and access ramp (9 ') communicates chamber in piston pressurized air chamber (9) and the jet pipe (9 "); Cylinder is equipped with movable contact ring (14) near static contact head device one end, and the current collector (2) that is assemblied on the moving contact (8) is arranged in the movable contact ring (14); One end of jet pipe (4) contacts with the inwall of movable contact ring (14); It is characterized in that: on fixing big conductor (22) inwall in static contact head device fairlead (20) is housed; Fairlead (20) limits jet pipe (4) and moves axially in fixed contact (1) outer; Current collector (2) periphery is equipped with auxiliary nozzle (7); Match by band shape fingertip (23) with the inwall of cylinder (16) in the front portion of big conductor (24), first valve plate (18) that piston pressurized air chamber (9) is communicated with the air chamber (15) that is formed by big conductor (24) is housed in the big conductor (24); Open-work (a) on the moving contact (8) is positioned at cylinder (16); The other end of jet pipe (4) contacts with fairlead (20).
2. circuit breaker according to claim 1, it is characterized in that: an end of described jet pipe (4) is forearc area (4a), the other end is water conservancy diversion district (4c), the centre is expansion regions (4b), there is bulge loop (4d) end of forearc area outer wall, jet pipe one end is that the outer wall by bulge loop (4d) contacts with the inwall of movable contact ring (14), the end of water conservancy diversion district outer wall fluted (4 "); groove is equipped with annular ring (21) in (4 "), and the other end of jet pipe (4) is closely to contact with fairlead (20) by annular ring (21); The inner chamber of forearc area (4a) becomes horn-like, and position (Q) the internal diameter minimum adjacent with expansion regions (4b).
3. circuit breaker according to claim 2 is characterized in that: in big conductor (24) lead (13) is housed also, and is contained in the annular valve plate (12) on the lead (13), on first valve plate (18), have two through holes at least.
4. circuit breaker according to claim 3, it is characterized in that: there is cannelure (23 ') front portion of big conductor (24), band shape fingertip (23) is housed in the cannelure (23 '), and big conductor (24) closely contacts with the inwall of cylinder (16) mutually by the fingertip (23) that is equipped with in the cannelure (23 ').
5. circuit breaker according to claim 4, it is characterized in that: in forearc area (4a) cavity of jet pipe (4) internal diameter at (Q) position greater than 1～2 millimeter of the external diameter of fixed contact (1), in expansion regions (4b) cavity near the internal diameter of forearc area (4a) end less than internal diameter near water conservancy diversion district (4c) end.
6. circuit breaker according to claim 5, it is characterized in that: the trumpet-shaped inner chamber in forearc area (4a) is to be inwardly protruded cambered surface near expansion regions (4b) end, inwardly recessed slick and sly connection of cambered surface in this cambered surface and this inner chamber, inside recessed cambered surface is that 3～5 ° taper inner chamber is connected with gradient again.
7. circuit breaker according to claim 6 is characterized in that: the end shape of grading shield (26) is the annular sphere of projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100173453A CN101000837B (en) | 2006-01-13 | 2006-01-13 | High voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100173453A CN101000837B (en) | 2006-01-13 | 2006-01-13 | High voltage circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101000837A CN101000837A (en) | 2007-07-18 |
| CN101000837B true CN101000837B (en) | 2010-06-09 |
Family
ID=38692754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100173453A Active CN101000837B (en) | 2006-01-13 | 2006-01-13 | High voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101000837B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124086B (en) * | 2014-08-18 | 2016-05-25 | 上海耐吉输配电设备有限公司 | A kind of electric arc-control device |
| CN105590780A (en) * | 2014-10-23 | 2016-05-18 | 苏州市吴中区欣鑫开关配件厂 | Contact of high-voltage breaker and using method thereof |
| CN110098086B (en) * | 2019-05-06 | 2020-10-02 | 国网江西省电力有限公司鹰潭供电分公司 | High-voltage arc extinction device for power grid |
| CN110071012B (en) * | 2019-05-08 | 2024-02-06 | 沈阳工业大学 | Self-energy double-acting arc extinguishing chamber |
| CN112038967B (en) * | 2020-08-25 | 2022-04-08 | 国核电力规划设计研究院有限公司 | Electric equipment and switch equipment thereof |
| CN114498212A (en) * | 2022-01-26 | 2022-05-13 | 南京超捷智能科技有限公司 | Connector for arc extinguishing during high-voltage live-line plugging |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063279C (en) * | 1996-07-23 | 2001-03-14 | Gec阿尔斯托姆T&D公司 | Automatic arc-blowing high voltage breaker |
| US6495785B1 (en) * | 2000-06-29 | 2002-12-17 | Abb Power T&D Company Inc. | Non-glue mounting of non-metallic tubes |
| EP1185996B1 (en) * | 1999-06-11 | 2003-09-10 | Siemens Aktiengesellschaft | High-voltage circuit breaker with a discharge channel |
| CN1445807A (en) * | 2002-03-18 | 2003-10-01 | 阿尔斯通股份有限公司 | High-pressure circuit breaker containing hot-blast chamber pressure relief valve |
| CN2864959Y (en) * | 2006-01-13 | 2007-01-31 | 河南平高电气股份有限公司 | High-voltage circuit-breaker |
-
2006
- 2006-01-13 CN CN2006100173453A patent/CN101000837B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063279C (en) * | 1996-07-23 | 2001-03-14 | Gec阿尔斯托姆T&D公司 | Automatic arc-blowing high voltage breaker |
| EP1185996B1 (en) * | 1999-06-11 | 2003-09-10 | Siemens Aktiengesellschaft | High-voltage circuit breaker with a discharge channel |
| US6495785B1 (en) * | 2000-06-29 | 2002-12-17 | Abb Power T&D Company Inc. | Non-glue mounting of non-metallic tubes |
| CN1445807A (en) * | 2002-03-18 | 2003-10-01 | 阿尔斯通股份有限公司 | High-pressure circuit breaker containing hot-blast chamber pressure relief valve |
| CN2864959Y (en) * | 2006-01-13 | 2007-01-31 | 河南平高电气股份有限公司 | High-voltage circuit-breaker |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平9-306309A 1997.11.28 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101000837A (en) | 2007-07-18 |
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Owner name: STATE ELECTRIC NET CROP. Effective date: 20130322 |
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Effective date of registration: 20130322 Address after: South East of Pingdingshan city in Henan province 467001 No. 22 Patentee after: Pinggao Electric Co., Ltd., Henan Patentee after: State Grid Corporation of China Address before: South East of Pingdingshan city in Henan province 467001 No. 22 Patentee before: Pinggao Electric Co., Ltd., Henan |