CN86100918A - A kind of compressed gas type arc-extinguishing breaker - Google Patents
A kind of compressed gas type arc-extinguishing breaker Download PDFInfo
- Publication number
- CN86100918A CN86100918A CN198686100918A CN86100918A CN86100918A CN 86100918 A CN86100918 A CN 86100918A CN 198686100918 A CN198686100918 A CN 198686100918A CN 86100918 A CN86100918 A CN 86100918A CN 86100918 A CN86100918 A CN 86100918A
- Authority
- CN
- China
- Prior art keywords
- triangular groove
- insulation nozzle
- annular triangular
- compressed gas
- angle
- 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.)
- Granted
Links
Images
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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
-
- 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
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
- H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
- H01H33/703—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
-
- 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
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
- H01H33/7069—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by special dielectric or insulating properties or by special electric or magnetic field control properties
Landscapes
- Circuit Breakers (AREA)
Abstract
A kind of compressed gas type arc-extinguishing breaker comprises a kind of insulation nozzle 10 that can move with arc contact 14.10 following current expansion comprises first, second annular triangular groove 34 and 36.The angle P of the axis of the line of the downstream edge 40 of middle trunnion 32 and 36 following current rib ridge 44 same 10
2, the line of downstream edge 40 less than 32 and 34 following current rib ridge 42 is with the angle P of 10 axis
1Therefore, left before 12 the front end of the wind drift gas flow fixed arc contact 12 of total some compression, and apply a Pneumatic pressure stream thereon, thereby avoided to cause the abrupt pressure reduction that produces the compression wind drift gas of electrical breakdowns at 12,14 10.
Description
The present invention is a kind of improvement to the insulation nozzle of compressed gas type arc-extinguishing breaker.
A kind of insulation nozzle that is used for compressed gas type arc-extinguishing breaker mainly is made up of three parts: the adverse current around removable arc contact is shunk induction part, and wherein removable arc contact and a fixed arc contact can carry out on-off action; Discharge portion and a middle standpipe tube portion of a following current expansion.
People are well known that, the insulation nozzle that has the big drift angle (for example 60 °) that the big following current angle of flare has the following current expansion in other words, the circuit breaker that is used for big interruption current is fit to, because the high-temperature gas that electric arc produced between arc contact can be got rid of effectively by insulation nozzle, but the outage voltage of circuit breaker is restricted.Because the unexpected variation of current path sectional area, produced the unexpected decline of insulation nozzle following current expansion wind drift gas pressure, it can make the carrying voltage capability generation of insulating between contact fall in one wink, like this in power process, even the distance between two contacts constantly strengthens, also can cause the electrical breakdown of contact or the generation of arcing sometimes.Particularly when circuit breaker will cut off a little capacitive current, situation is just more serious, because greatly when just beginning to cut off the power supply the back half period, is added in maximum recovery voltage on two contacts than the specified big twice of voltage that arrive ground mutually or more than the twice.And the distance between two contacts does not also have big to being enough to bear big like this recovery voltage at this moment.
People recognize that also the insulation nozzle of a kind of little following current angle of flare (for example 20 °) is proper for the circuit breaker of higher outage voltage simultaneously.But same, its interruption current is restricted.Because the high-temperature gas that the electric arc between contact produces can not be got rid of effectively from the insulation mouth sometimes, so that two contacts are by electrical breakdown.This situation occurs in circuit breaker especially easily
When interruption current is bigger.
United States Patent (USP) 3,816, the performance of the big interruption current of 684 pairs of axial arc-extinguishing breakers of Compressed Gas is improved, and discloses a kind of nozzle, and this nozzle is by the induction part of shrinking, and the discharge portion of expansion and middle standpipe tube portion are formed.Expansion discharge portion in middle trunnion downstream has many cannelures.The radially cross section of these grooves is leg-of-mutton basically, and by the last domatic and following domatic drift angle that has constituted groove that intersects, one of them face is vertical substantially with the axle of nozzle itself, and the steam vent facing to nozzle is opened at the horizontal end.In other words conj.or perhaps along the direction that helps ionized gas to overflow, promptly along the airflow direction that suppresses spark.The wall that the heat-flash that this gas is caused by electric arc acts on the exhaust expansion produces.The first adjacent road ring begins little by little to reduce leg-of-mutton size on the radially cross section of each annular groove from middle trunnion downstream, till the last ring together of nozzle exit.In the groove one by one of jet expansion direction, the distance of contiguous two grooves is also increasing simultaneously.
On August 17th, 1984, the Europe patent application 84109801.5 that assignee of the present invention submits to, " gas-insulated circuit breaker " discloses a kind of follow-on insulation nozzle, and it can make the performance when big interruption current and little capacitive character interruption current improve.The exhaust outlet expansion of this insulation nozzle has the annular triangular groove that forms in the downstream of middle trunnion.The annular drift angle of triangular groove and the selection principle of rib ridge height are by annular triangular groove, make a part of Compressed Gas can directly flow to the front end of fixed arc contact, to prevent because the unexpected variation of cross section causes reducing suddenly of there gas pressure.And gas pressure reduce suddenly to make in power process, even the distance between two contacts constantly increases, also can cause the electrical breakdown between two contacts.
The purpose of this invention is to provide a compressed gas type arc-extinguishing breaker that has insulation nozzle, this insulation nozzle has the bigger following current angle of flare.When outage, along with the distance between two electrical contacts of circuit breaker increases, the puncture voltage that can bear constantly increases basically.Therefore, the performance of circuit breaker is improved during not only big interruption current, and the outage of little capacitive character
The performance of circuit breaker also is improved during stream.
Another object of the present invention provides the insulation nozzle that a kind of compressed gas type arc-extinguishing breaker uses, and can prevent to be in the unexpected decline of wind drift gas pressure of the fixed arc contact front end of insulation nozzle following current expansion when outage.
Compressed gas type arc-extinguishing breaker of the present invention comprises a fixed arc contact, a fixed arc contact contact or the removable arc contact that disconnects therewith.One is moved with moving contact and around the insulation nozzle of this moving contact, so that a kind of Compressed Gas is imported between two arc contacts.This insulation nozzle has formed adverse current constriction, following current expansion and middle standpipe tube portion around removable arc contact.The following current expansion comprises one first annular triangular groove and one second annular triangular groove.The mediate downstream of trunnion of the first annular triangular groove, the second annular triangular groove then is in the downstream of the first annular triangular groove.Its size design is to make line between the following current rib ridge of the downstream edge of middle standpipe tube portion and the second annular triangular groove with the angle of insulation nozzle axis, less than the angle of the line between the following current rib ridge of the downstream edge of middle standpipe tube portion and the first annular triangular groove with the insulation nozzle axis.So, a part of Compressed Gas is flowed near the front end of fixed arc contact, especially from the position on its top to 30 °～70 °, electric field strength herein is very high.In the stroke that the almost whole contact of circuit breaker is opened, before insulation nozzle leaves the fixed arc contact, applied a Pneumatic pressure stream in other words conj.or perhaps.So just can prevent the two contact electrical breakdowns that the abrupt pressure reduction owing to gas jet causes.
Fig. 1 represented among the embodiment of compressed gas type arc-extinguishing breaker of the present invention, when contact is opened stroke, and the generalized section of its critical piece.
Fig. 2 is a same parts shown in Figure 1 profile when another opens impulse stroke at contact.
Fig. 3 is the local amplification profile of the insulation nozzle shown in Fig. 1,2.
Fig. 4 is the corresponding leading edge of the fixed arc contact place electric field strength shown in Fig. 2.The curve chart of gas pressure and carrying voltage.
Analyze with reference to Fig. 1,2. An impulse stroke of circuit breaker when Fig. 1 has represented the circuit outage, Fig. 2 has represented another stroke that continues of circuit breaker after the above-mentioned stroke, and the distance of 14 of fixed arc contact 12 and removable arc contacts was greater than and was present in this distance shown in Fig. 1 this moment. Removable arc contact 14 is installed on the axle 22 of inflator 16, and inflator 16 forms airflow chamber 18 with non-movable piston 20, by the motion of inflator 16, just can produce Compressed Gas in airflow chamber 18 like this. The motion of inflator is by handling with the mechanical device (not shown in FIG.) of axle 22 phase configuration. The insulation nozzle 10 made from the tetrafluoroethene fluoroplastics is installed in an end of inflator 16 by support 30. Gas-flow deflector 26 be centered around removable arc contact 14 around. The Compressed Gas that produces in airflow chamber 18 enters by the adverse current of insulation nozzle 10 by the hole 28 in the inflator 16 and shrinks formed passage between the gentle conductance plate 26 of induction part, as shown by arrows in FIG..
When manipulation device was received the instruction of open-circuit line, manipulation device just made inflator 16 move to leftward position among the figure. A kind of arc extinguishing gases of result, preferably sulfur fluoride (SF6) gas just in airflow chamber 18 beginning compressed, and electrical contact begins to open, before the middle standpipe tube portion of insulation nozzle 10 is crossed the front end of fixed arc contact 12, most of Compressed Gas in the airflow chamber 18 will flow through the interstitial hole of removable arc contact 14 and in the hole 24 that axle 22 is made, it flows to as shown by arrows in FIG..
When the disconnection process of circuit is further carried out (as shown in Figure 1), the first annular triangular groove that forms at insulation nozzle 10 following current expansion walls, just appear at the front end of fixed arc contact 12, this moment, most of Compressed Gas just flow through middle trunnion 32(as shown by arrows in FIG.). A part of gas in the above-mentioned gas is because the work of the first annular triangular groove 34
With, flow to the front end of fixed arc contact 12, particularly in 30 °～70 ° from the contact top scope, this is the place that originally can produce unexpected gas pressure drop and highfield.
When the disconnection process of circuit proceeds to as shown in Figure 2 the position, the second annular triangular groove 36 in the first annular triangular groove, 34 downstreams of insulation nozzle 10, just appear at the front end of fixed arc contact 12, at this moment the second annular triangular groove 36 further makes air-flow directly flow to the front end of fixed arc contact 12, and apply a Pneumatic pressure stream thereon, to prevent the bust of pressure.
The 3rd annular triangular groove 38 that is in the second annular triangular groove, 36 downstreams also plays a part same. Owing to these three annular triangular grooves 34,36 and 38 are distributed on the whole axial length of insulation nozzle 10 following current expansions basically. Therefore, before insulation nozzle 10 is crossed whole fixed arc contact 12, namely in contact 12 and 14 s' distance even as big as bearing before the recovery voltage therebetween, this structure can prevent near the abrupt pressure reduction the fixed arc contact front end, thereby has avoided producing electrical breakdown between two contacts.
Referring now to Fig. 3 first, second and third annular triangular groove 34 of insulation nozzle 10 following current expansions, 36,38 size are further described.
By the line of the following current rib ridge 42 of the downstream edge 40 of middle standpipe tube portion 32 and the first annular triangular groove 34, be P with angle between the line parallel with the axis of insulation nozzle 101; By the line of the following current rib ridge 44 of above-mentioned downstream edge 40 and the second annular triangular groove 36, be P with angle between the line parallel with the axis of insulation nozzle 102; By the line of the following current rib ridge 46 of above-mentioned downstream edge 40 and the 3rd annular triangular groove 38, be P with angle between the line parallel with the axis of insulation nozzle 103 Their relation is P1(such as 15 °) are greater than P2(such as 10 °), and P2Again greater than P3(such as 7.5 °).
Angle θ among Fig. 31And θ2Relevant with generation air whirl in the gas of insulation nozzle 10 following current expansions. And this vortex phenomenon must be avoided.
Angle θ1That the bottom land 48,50 and 52 of first, second and third annular triangular groove 34,36 and 38 is respectively with the line of adverse current rib ridge 40,42 and 44, with the angle of insulation nozzle 10 axis. In other words conj.or perhaps first, second and third annular triangular groove 34,36 and 38 Caused by Sloping Surfaces and the angle of insulation nozzle 10 axis. For example in this embodiment, θ1Angle elect 43 ° as.
Angle θ2That first, second and third annular triangular groove 34,36 and 38 bottom land 48,50 and 52 are respectively with the line of following current rib ridge 42,44 and 46. Angle with insulation nozzle 10 axis. The angle of the axis of first, second and third annular triangular groove 34,36 and 38 upper domatic and insulation nozzle 10 in other words conj.or perhaps. For example in this embodiment, θ2Angle elect 28 ° as.
Fig. 4 has shown the result of use of Fig. 1,2 and 3 described insulation nozzles.
It (is P that curve 60 expression the present invention adopt above-mentioned insulation nozzle1＞P
2＞P
3) time, the breakdown voltage that can bear in fixed arc contact front end relevant position, this moment insulation nozzle with respect to the position of fixed arc contact as shown in Figure 2, the distance between fixed arc contact and removable arc contact is about 80mm.
The breakdown voltage that the insulation nozzle of the another kind of contrast of curve 62 expressions circuit breaker can bear in fixed arc contact front end relevant position. This insulation nozzle adopts P1＜P
2＜P
3Version, its insulation nozzle is identical with the situation of curve 60 with respect to the position of fixed arc contact.
The gas pressure of curve 64 expressions fixed arc contact front end of the present invention relevant position, its condition of work is described identical with curve 60.
The electric-field intensity of fixed arc contact front end relevant position.
As can see from Figure 4, the present invention makes fixed arc contact front end relevant position, and the breakdown voltage and the gas pressure that especially bear in 30 °～70 ° scopes in fixed arc contact top have had very big improvement. Therefore, compressed gas type arc-extinguishing breaker of the present invention, the performance the when performance when big interruption current and little capacitive character interruption current all is improved.
Claims (5)
1, a kind of compressed gas type arc-extinguishing breaker, it comprises: the removable inflator (16) with hollow shaft (22); Non-movable piston (20) with above-mentioned removable inflator (16) corresponding configuration, it can produce Compressed Gas when opening circuit action; A fixed arc contact (12); A removable arc contact (14) that contacts or separate with said fixing arc contact (12), it is fixed on the hollow shaft (22) of above-mentioned removable inflator (16); One is fixed on above-mentioned removable inflator (16) and goes up and be centered around removable arc contact (14) insulation nozzle (10) on every side, it can import Compressed Gas between fixing and the removable arc contact (12,14), and above-mentioned insulation nozzle (10) is by forming around an adverse current constriction of removable electrical contact (14), following current expansion and a centre trunnion (32).
It is characterized in that: the following current expansion of described insulation nozzle (10) comprising: first an annular triangular groove (34) that is positioned at middle trunnion (32) downstream; Second annular triangular groove (36) that is positioned at first annular triangular groove (34) downstream, and these grooves have such physical dimension: i.e. P
2Less than P
1, P wherein
2The angle of the same insulation nozzle of line (10) axis in the middle of being between the following current rib ridge (44) of the downstream edge (40) of trunnion (32) and the above-mentioned second annular triangular groove (36), P
1The angle of the same insulation nozzle of line (10) axis in the middle of being between the following current rib ridge (42) of the downstream edge (40) of trunnion (32) and the above-mentioned first annular triangular groove (34).
2, compressed gas type arc-extinguishing breaker according to claim 1 is characterized in that: the expansion of above-mentioned insulation nozzle (10) comprises the 3rd an annular triangular groove (38) that is positioned at second annular triangular groove (36) downstream, and its physical dimension is p
3Less than p
2, p wherein
3The angle of the same insulation nozzle of line (10) axis in the middle of being between the following current rib ridge (46) of the downstream edge (40) of trunnion (32) and the 3rd annular triangular groove (38), p
2The angle of the same insulation nozzle of line (10) axis in the middle of being between the following current rib ridge (44) of the downstream edge (40) of trunnion (32) and the second annular triangular groove (36).
3, compressed gas type arc-extinguishing breaker according to claim 1 and 2 is characterized in that: described first, second and third annular triangular groove (34,36,38) following domatic and last domatic respectively with the angle theta of insulation nozzle (10) axis
1And θ
2Selection, be to make that wind drift gas does not produce eddy current at expansion in the action of opening circuit.
4, compressed gas type arc-extinguishing breaker according to claim 1 and 2 is characterized in that: described first, second and third annular triangular groove (34,36,38) following domatic and last domatic respectively with the angle Q of insulation nozzle (10) axis
1And Q
2It is approximately respectively 43 ° and 28.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60026286A JPS61188825A (en) | 1985-02-15 | 1985-02-15 | Buffer type gas breaker |
| JP26286/85 | 1985-02-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86100918A true CN86100918A (en) | 1986-10-01 |
| CN86100918B CN86100918B (en) | 1988-06-22 |
Family
ID=12189051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86100918A Expired CN86100918B (en) | 1985-02-15 | 1986-02-15 | Compressed gas type arc-extinguishing breaker |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0191465B1 (en) |
| JP (1) | JPS61188825A (en) |
| KR (1) | KR900002953B1 (en) |
| CN (1) | CN86100918B (en) |
| DE (1) | DE3671567D1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101996828A (en) * | 2009-08-17 | 2011-03-30 | Ls产电株式会社 | Gas insulation circuit breaker with structure for decreasing friction |
| CN104538239A (en) * | 2014-11-20 | 2015-04-22 | 平高集团有限公司 | Nozzle, arc chute using nozzle, breaker and change-over switch |
| CN109716476A (en) * | 2016-07-21 | 2019-05-03 | Abb瑞士股份有限公司 | Gas insulated high voltage switching device with improved main burner |
| CN110402475A (en) * | 2017-03-02 | 2019-11-01 | Abb瑞士股份有限公司 | With the high-voltage circuit breaker for improving robustness |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274205A (en) * | 1990-08-03 | 1993-12-28 | Hitachi, Ltd. | Gas blast, puffer type circuit breaker with improved nozzle |
| JPH0495322A (en) * | 1990-08-03 | 1992-03-27 | Hitachi Ltd | Gas blast circuit breaker |
| DE19519992C2 (en) * | 1995-05-24 | 2002-03-21 | Siemens Ag | Switching section for a high-voltage circuit breaker working with an extinguishing gas |
| KR100403965B1 (en) * | 2001-03-16 | 2003-10-30 | 한국전기연구원 | Breaking part structures of a gas circuit breaker |
| JP4421331B2 (en) * | 2004-02-26 | 2010-02-24 | 株式会社東芝 | Gas circuit breaker |
| CN104332352B (en) * | 2014-10-15 | 2016-08-24 | 中国西电电气股份有限公司 | A kind of SF6gas-break switch |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO134274C (en) * | 1971-07-30 | 1976-09-08 | Magrini Fab Riun Scarpa | |
| JPS4943743U (en) * | 1972-07-20 | 1974-04-17 | ||
| JPS5811772B2 (en) * | 1974-04-19 | 1983-03-04 | オムロン株式会社 | Switching Souch |
| DE7516624U (en) * | 1975-05-24 | 1977-09-01 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Auto-pneumatic pressure gas switch with an insulating nozzle |
| DE2805289C2 (en) * | 1978-02-08 | 1984-06-07 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Auto-pneumatic pressure gas switch |
| CA1243342A (en) * | 1983-08-24 | 1988-10-18 | Fumihiro Endo | Gas-insulated circuit breaker |
-
1985
- 1985-02-15 JP JP60026286A patent/JPS61188825A/en active Pending
-
1986
- 1986-02-12 EP EP86101748A patent/EP0191465B1/en not_active Expired - Lifetime
- 1986-02-12 DE DE8686101748T patent/DE3671567D1/en not_active Expired - Lifetime
- 1986-02-14 KR KR1019860001025A patent/KR900002953B1/en not_active IP Right Cessation
- 1986-02-15 CN CN86100918A patent/CN86100918B/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101996828A (en) * | 2009-08-17 | 2011-03-30 | Ls产电株式会社 | Gas insulation circuit breaker with structure for decreasing friction |
| CN101996828B (en) * | 2009-08-17 | 2013-08-07 | Ls产电株式会社 | Gas insulation circuit breaker with structure for decreasing friction |
| CN104538239A (en) * | 2014-11-20 | 2015-04-22 | 平高集团有限公司 | Nozzle, arc chute using nozzle, breaker and change-over switch |
| CN104538239B (en) * | 2014-11-20 | 2017-06-06 | 平高集团有限公司 | A kind of nozzle and arc-chutes, breaker, the transfer switch unit using the nozzle |
| CN109716476A (en) * | 2016-07-21 | 2019-05-03 | Abb瑞士股份有限公司 | Gas insulated high voltage switching device with improved main burner |
| CN109716476B (en) * | 2016-07-21 | 2020-06-26 | Abb瑞士股份有限公司 | Gas-insulated high-voltage switching device with improved main nozzle |
| CN110402475A (en) * | 2017-03-02 | 2019-11-01 | Abb瑞士股份有限公司 | With the high-voltage circuit breaker for improving robustness |
| CN110402475B (en) * | 2017-03-02 | 2021-10-15 | Abb电网瑞士股份公司 | High-voltage circuit breaker with improved robustness |
Also Published As
| Publication number | Publication date |
|---|---|
| CN86100918B (en) | 1988-06-22 |
| EP0191465A2 (en) | 1986-08-20 |
| DE3671567D1 (en) | 1990-06-28 |
| KR900002953B1 (en) | 1990-05-03 |
| KR860006821A (en) | 1986-09-15 |
| JPS61188825A (en) | 1986-08-22 |
| EP0191465A3 (en) | 1989-02-22 |
| EP0191465B1 (en) | 1990-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1072833C (en) | Gas circuit breaker | |
| CN86100918A (en) | A kind of compressed gas type arc-extinguishing breaker | |
| US10964498B2 (en) | Gas-insulated low- or medium-voltage load break switch | |
| CN1065069C (en) | Puffer type gas circuit breaker | |
| CN103000444A (en) | Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof | |
| CN1326206A (en) | Insulative nozzle for circuit breaker | |
| KR890002474B1 (en) | Gas-insulated circuit breaker | |
| CN111403231B (en) | Hybrid arc extinguishing chamber | |
| US4524257A (en) | High-voltage gas-blast puffer type circuit-breaker | |
| CN111630621B (en) | Circuit breaker and method of performing current breaking operation | |
| EP3488458B1 (en) | Gas-insulated high-voltage switching device with improved main nozzle | |
| CN111834901B (en) | Multistage back-flushing arc extinguishing method and system | |
| US3821507A (en) | Circuit interrupters utilizing supersonic flow | |
| CN220796581U (en) | Arc extinguishing structure and circuit breaker | |
| CN210350367U (en) | Recoil device and lightning conductor structure thereof | |
| JPH03263724A (en) | Gas blast circuit breaker | |
| EP0061992A2 (en) | High-voltage gas-blast puffer type circuit-breaker | |
| JP2875671B2 (en) | Patch type gas circuit breaker | |
| CN116487236A (en) | Arc extinguish chamber structure of molded case circuit breaker | |
| RU2396629C2 (en) | Arc-extinguishing device of high-voltage gas-filled puffer breaker | |
| JPH07143625A (en) | Grounding device | |
| JPH08203395A (en) | Gas-blast circuit breaker | |
| CN111834911A (en) | Multi-stage horn-shaped recoil discharge arc extinguishing tube | |
| JPH0435857B2 (en) | ||
| JPH0566852U (en) | Contact part of switchgear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |