CN86100918B - Compressed gas type arc-extinguishing breaker - Google Patents
Compressed gas type arc-extinguishing breaker Download PDFInfo
- Publication number
- CN86100918B CN86100918B CN86100918A CN86100918A CN86100918B CN 86100918 B CN86100918 B CN 86100918B CN 86100918 A CN86100918 A CN 86100918A CN 86100918 A CN86100918 A CN 86100918A CN 86100918 B CN86100918 B CN 86100918B
- Authority
- CN
- China
- Prior art keywords
- triangular groove
- annular triangular
- insulation nozzle
- angle
- compressed gas
- 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
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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
- H01H33/70—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
The present invention provides a puffer type gas blast circuit bteaker including an insulation nozzle (10) for the puffer type gas blast circuit breaker moves together with a movable arcing contact (14). A downstream divergent section of the insulation nozzle (10) includes a first annular triangular groove (34) and a second annular triangular groove (36). The second annular triangular groove (36) is dimensioned that an angle (P2) of a line between the downstream edge (40) of the intermediate throat section (32) and downstream ridge (44) of the second annular triangular groove (36) is smaller than an angle (P1) of a line between the downstream edge (40) of the intermediate throat section (32) and the downstream ridge (42) of the first annular triangular groove (34) to the axis of the insulation nozzle (10), whereby part of compressed blast gas is directed to the visinity of the front end portion of a stationary arcing contact (12) to apply a dynamic pressure thereat until the insulation nozzle (10) leaves the stationary arcing contact (12) to thereby prevent sudden pressure drops of the compressed blast gas thereat which causes an electrical breakdown between the arcing contacts (12, 14).
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 the interruption current of circuit breaker bigger the time especially easily.
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, 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 horizontal end open steam vent facing to nozzle, in other words conj.or perhaps along the direction that helps ionized gas to overflow, promptly along the airflow direction that suppresses spark.This gas is produced in the wall of exhaust expansion by the strong effect that electric arc causes.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 european patent application 84109801.5 that assignee of the present invention submits to, " gas-insulated circuit breaker ", a kind of follow-on insulation nozzle is disclosed, it can make the performance at 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 drift angle of annular triangular groove and the selection principle of rib ridge height, be by annular triangular groove, make a part of Compressed Gas can directly flow to the front end of fixed arc contact, to prevent causing reducing suddenly of there gas pressure owing to the unexpected variation of cross section, (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).But this invention is insufficient to the effect that the fore-end of fixed arc contact applies Pneumatic pressure.
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 performance of circuit breaker also is improved during little capacitive character interruption current.
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.In other words conj.or perhaps before insulation nozzle leaves the fixed arc contact, apply a Pneumatic pressure stream, 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 drawing among the figure) of axle 22 phase configuration.The insulation nozzle made from the tetrafluoroethene fluoroplastics 10 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 in the inflator 16 28 and shrinks formed passage between the gentle conductance plate 26 of induction part, shown in arrow among the figure.
When operating device was received the instruction of open-circuit line, operating device just made inflator 16 move to leftward position among the figure.A kind of arc extinguishing gases of result, preferably sulfur fluoride (SF
6) gas just begins to be compressed in airflow chamber 18, 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 the hole 24 of making on axle 22, it flows to shown in arrow among the figure.
When the disconnection process of circuit is further carried out (as shown in Figure 1), the first annular triangular groove that on insulation nozzle 10 following current expansion walls, forms, just appear at the front end of fixed arc contact 12, just this moment, most of Compressed Gas flow through middle trunnion 32(shown in arrow among the figure).A part of gas in the above-mentioned gas flows to the front end of fixed arc contact 12 owing to the effect of the first annular triangular groove 34, and particularly in 30 °～70 ° from the contact top scope, this is the place that can produce unexpected gas pressure drop and highfield originally.
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, promptly 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 the size of first, second and third annular triangular groove 34,36,38 of insulation nozzle 10 following current expansions is 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, with and the line of the parallel axes of insulation nozzle 10 between angle be P
1; By the line of the following current rib ridge 44 of the above-mentioned downstream edge 40 and the second annular triangular groove 36, with and the line of the parallel axes of insulation nozzle 10 between angle be P
2; By the line of the following current rib ridge 46 of above-mentioned downstream edge 40 and the 3rd annular triangular groove 38, with and the line of the parallel axes of insulation nozzle 10 between angle be P
3Their relation is P
1(as 15 °) are greater than P
2(as 10 °), and P
2Again greater than P
3(as 7.5 °).
Angle θ among Fig. 3
1And θ
2Air whirl is relevant with producing in the gas of insulation nozzle 10 following current expansions, and this vortex phenomenon must be avoided.
Angle θ
1The bottom land 48,50 and 52 that is 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.Or perhaps the angle of following domatic and insulation nozzle 10 axis of first, second and third annular triangular groove 34,36 and 38.For example in this embodiment, θ
1Angle elect 43 ° as.
Angle θ
2The bottom land 48,50 and 52 that is first, second and third annular triangular groove 34,36 and 38 is respectively with the line of following current rib ridge 42,44 and 46.Angle with insulation nozzle 10 axis.Or perhaps the angle of the axis of the last domatic and insulation nozzle 10 of first, second and third annular triangular groove 34,36 and 38.For example in this embodiment, θ
2Angle 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 nozzle
1＞P
2＞P
3) time, the puncture 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 puncture 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 P
1＜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.
As can see from Figure 4, the present invention makes fixed arc contact front end relevant position, and especially puncture voltage and the gas pressure that is born in 30 °～70 ° scopes in fixed arc contact top had very big improvement.Therefore, compressed gas type arc-extinguishing breaker of the present invention, the performance 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 comprises a 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 fixing and removable arc contact (12 with Compressed Gas, 14) between, above-mentioned insulation nozzle (10) is by an adverse current constriction around removable arc contact (14), trunnion (32) is formed in the middle of following current expansion and one, described following current expansion comprises the first annular triangular groove (34) and the second annular triangular groove (36) that is positioned at first annular triangular groove (34) downstream that are positioned at middle trunnion (32) downstream
It is characterized in that the described second annular triangular groove has such physical dimension: i.e. P
1＞P
2, 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
2＞P
3, 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 the 3rd annular triangular groove (34,36,38) following domatic and last domatic respectively with the angle theta of insulation nozzle (10) axis formation
1And θ
2, be to make that wind drift gas does not produce the angle of eddy current at this 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 the 3rd annular triangular groove (34,36,38) following domatic and last domatic respectively with the angle theta of insulation nozzle (10) axis
1And θ
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 CN86100918A (en) | 1986-10-01 |
| CN86100918B true 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) |
Families Citing this family (10)
| 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 |
| KR101564990B1 (en) * | 2009-08-17 | 2015-11-03 | 엘에스산전 주식회사 | Gas insulation circuit breaker with a structure for decreasing friction |
| 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 |
| 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 |
| WO2018015436A1 (en) * | 2016-07-21 | 2018-01-25 | Abb Schweiz Ag | Gas-insulated high-voltage switching device with improved main nozzle |
| CN110402475B (en) * | 2017-03-02 | 2021-10-15 | Abb电网瑞士股份公司 | High-voltage circuit breaker with improved robustness |
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
Also Published As
| Publication number | Publication date |
|---|---|
| CN86100918A (en) | 1986-10-01 |
| 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 |
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| 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 | ||
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