CN1068909A - A kind of contact that circuit breaker is used - Google Patents
A kind of contact that circuit breaker is used Download PDFInfo
- Publication number
- CN1068909A CN1068909A CN 92105850 CN92105850A CN1068909A CN 1068909 A CN1068909 A CN 1068909A CN 92105850 CN92105850 CN 92105850 CN 92105850 A CN92105850 A CN 92105850A CN 1068909 A CN1068909 A CN 1068909A
- Authority
- CN
- China
- Prior art keywords
- contact
- circuit breaker
- electrical contact
- end pieces
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/38—Plug-and-socket contacts
- H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
-
- 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
-
- 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
- H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor
Landscapes
- Circuit Breakers (AREA)
Abstract
A kind of electrical contact can be as the arc of motion contact of circuit breaker, and circuit breaker comprises an air-blowing volume and an air nozzle.Being characterized as with a metal tube (9) of described electrical contact made, and fixing the end pieces of being manufactured by insulating material (12) in its end.
Description
The present invention relates to a kind of electrical contact, it can be as constituting the arcing contact that medium-pressure or high pressure opens circuit.
In ABB, when separating, arcing contact forms electric arc, and the heat that this electric arc produced makes gas heated in the volume of what is called " air-blowing volume " or " allowance for expansion " usually.This volume is at one end delimited by the air-blowing nozzle.When electric current when being interdicted by zero point, the throat of the gas in the air-blowing volume by nozzle this electric arc that spreads and jet.
It is not in full force and effect having sent out by air-blowing, the electric arc that produced when (for example being equivalent to the electric current that circuit breaker inserts the rated value in the loop) at the little electric current of blocking of particularly jetting is especially like this, this be because in the air-blowing volume the sufficient inadequately cause of the increase of pressure.
The objective of the invention is to improve contact,, particularly be lower than the situation of electric current for blocking so that in the air-blowing volume, obtain high pressure.
A kind of electrical contact provided by the present invention can achieve the above object, this electrical contact can be as the arc of motion contact in the gas-blast circuit breaker that has air-blowing volume and air nozzle, and it is characterized by, it utilizes a metal tube to constitute, and is fixed with an end pieces of being made by insulating material in the end of pipe.
End pieces of the present invention not should with french patent application 2,389,219 described insulating elements are obscured mutually.In that file, insulating element is placed on the inboard of the fixedly arcing contact of circuit breaker, and it can make electric arc be switched to be fixed in this fixedly on the annular electrode on the arcing contact.
In present patent application, this end pieces is the end that is placed on the arc of motion contact, and this circuit breaker is without any annular electrode.
An embodiment who is described below in conjunction with the drawings will obtain clearer understanding to the present invention.
Fig. 1 is the partial view of the axial section of blocking cell under the gas-blast circuit breaker "on" position.
Fig. 2 is identical view, but has been separated the situation of arc blow-out before the stage afterwards at arc contact;
Fig. 3 is an identical view, and the wink that is blowed for electric arc is to situation.
The part blocking cell that is shown in Fig. 1 axial section includes a hermetically sealed 1(and is made of electroceramics in conventional circuit breaker, in the circuit breaker that the golden shell of ground connection coats, constitute by metal) in fill with the gas of the good insulation performance of bar pressure, for example sulphur hexafluoride.
In this cell the inside, a fixing assembly is arranged, it comprises: a metal tube 2, receive the first end (not shown) and connect one on electric and constitute this fixedly first metal tube 3 of main contact; One second metal tube 4, it and the first metal tube coaxial line also constitute fixing arcing contact; And the air nozzle 5 of an insulation, for example can be by polytetrafluoroethylene (for example famous registered trade mark Teflon (teflon)), it is made of the material that stops the electric arc effect to be provided with a parts 4A in the end of second pipe 4, for example makes with tungsten carbide.
Constitute the air-blowing volume of circuit breaker by the volume 6 of pipe 2 and 5 boundaries of nozzle.
The inner of second pipe 4 can be (single jet) or (two jet) opened that seals.
The sports equipment of circuit breaker comprises a metal tube 8, receives second terminal by the sliding contact (not shown) on electric, and this pipe 8 is received on the insulation drive rod (not shown).
A pipe end of 8 is extended and accepting contact pipe 9 that constitutes the arc of motion contact and a plurality of fingertips 10 that form the long-term work contact of motion, and the end of contact pipe 9 is provided with the parts 9A that is made by prevention electric arc effect material.
An end pieces 12 of making of insulating material is equipped with in the end of contact pipe 9, and this end pieces is extended beyond the parts 9A, and is fixed on the pipe 9 by screw or crimping.
The material of this end pieces is polytetrafluoroethylene preferably, because when it produces fluoride steam during by arc heating, with easy blocking electric arc, this material can be filled out with such as glass fibre or resin.
When circuit breaker is positioned at closing position, electric current flowing pipe 2, contact 3, fingertip 10 and manage 8.
When circuit breaker was cut-off, main contact 3 separated with 10 motions, at this moment flow through arcing contact 4 and 9 of electric current.
About the separation (Fig. 2) of arcing contact, electric arc 15 triggers between each arc contact, and the gas in the volume 6 warms up, and has therefore increased the pressure that this volume gets.Though the end 9A of arc of motion contact 9 has shifted out the throat of nozzle, so because the cause volume 6 of end pieces 12 still keeps closed state.In like manner, because the gas in this volume can not run out of by the narrow circular passage that exists between end pieces 12 and nozzle throat, so the pressure in volume 6 continues to rise.
Have only when end pieces 12 and shift out (Fig. 3) outside the nozzle throat, volume 6 just is opened, and jetly promptly runs out of by nozzle throat.By taking into account the translational speed of each contact, can calculate the length of this end pieces 12, so that obtain the enough pressure of volume 6 inside, and interdicted when making the current over-zero value.
The present invention can be used in the little electric current of blocking (for example, rated current is in contrast to such as the such high electric current of short circuit current), because it has utilized the air blowing effect maximumly.
Fixedly arcing contact so that the form of a pipe is made provides two-way blowing gas at the circuit breaker opening procedure, shown in paper tinsel head among Fig. 3.
The present invention can be used for conventional pattern or have the medium-pressure or high pressure circuit breaker of grounded metal involucrum.
Claims (5)
1, a kind of electrical contact, the arc of motion contact that is used for ABB, this circuit breaker includes an air-blowing volume and an air-blowing nozzle, being characterized as of described electrical contact, it is to be made of the metal tube (9) by described nozzle (5), and have an end pieces (12) that is fixed on its end, these parts are manufactured with insulating material.
2, a kind of electrical contact as claimed in claim 1 is characterized by, and described end pieces (12) and the used material of described nozzle are polytetrafluoroethylene.
3, a kind of electrical contact as claimed in claim 1 or 2 is characterized by, and this end pieces (12) is fixed on the pipe (9) by screw.
4, a kind of electrical contact as claimed in claim 1 or 2 is characterized by, and this end pieces (12) is fixed on the pipe (9) by crimping.
5, as each described a kind of electrical contact in the claim 2 to 4, it is characterized by filling with polytetrafluoroethylene.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9109177A FR2679375A1 (en) | 1991-07-19 | 1991-07-19 | CONTACTOR FOR CIRCUIT BREAKER. |
| FR9109177 | 1991-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1068909A true CN1068909A (en) | 1993-02-10 |
Family
ID=9415335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92105850 Pending CN1068909A (en) | 1991-07-19 | 1992-07-18 | A kind of contact that circuit breaker is used |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0524088A1 (en) |
| JP (1) | JPH05190064A (en) |
| CN (1) | CN1068909A (en) |
| BR (1) | BR9202729A (en) |
| CA (1) | CA2074037A1 (en) |
| FR (1) | FR2679375A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943394A (en) * | 2013-01-23 | 2014-07-23 | 沈俊国 | Insulation barrier and arc-extinguishing type electric appliance switch contact head |
| CN110293511A (en) * | 2019-06-14 | 2019-10-01 | 平高集团有限公司 | A kind of moving arcing contact handling tooling |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2709865B1 (en) * | 1993-09-08 | 1995-10-13 | Gec Alsthom T & D Sa | Arc contact for self-blowing circuit breaker. |
| ATE352853T1 (en) | 2003-12-19 | 2007-02-15 | Abb Technology Ag | GAS-INSULATED SWITCHING DEVICE WITH A NOZZLE |
| EP1913621A1 (en) * | 2005-08-10 | 2008-04-23 | ABB Research Ltd | Self-blast circuit breaker with control body |
| DE102009043195A1 (en) | 2009-09-26 | 2011-03-31 | Rwth Aachen | Abbrandelement for arrangement on a switching contact of a circuit breaker |
| JP5921778B1 (en) | 2015-01-07 | 2016-05-24 | 三菱電機株式会社 | Gas circuit breaker |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH612293A5 (en) * | 1977-04-29 | 1979-07-13 | Bbc Brown Boveri & Cie | |
| IT8420810V0 (en) * | 1984-02-10 | 1984-02-10 | Sace Spa | ARC CONTACT SYSTEM FOR ELECTRIC SWITCHES, PARTICULARLY WITH ARC EXTINGUISHING FLUID. |
| EP0270895A1 (en) * | 1986-12-08 | 1988-06-15 | BBC Brown Boveri AG | Pressurized-gas switch |
| DE3930550C2 (en) * | 1989-09-13 | 1998-12-10 | Aeg Energietechnik Gmbh | Switching chamber for SF¶6¶ circuit breakers |
-
1991
- 1991-07-19 FR FR9109177A patent/FR2679375A1/en not_active Withdrawn
-
1992
- 1992-07-15 EP EP92402039A patent/EP0524088A1/en not_active Withdrawn
- 1992-07-16 JP JP18963592A patent/JPH05190064A/en active Pending
- 1992-07-16 CA CA 2074037 patent/CA2074037A1/en not_active Abandoned
- 1992-07-17 BR BR929202729A patent/BR9202729A/en not_active Application Discontinuation
- 1992-07-18 CN CN 92105850 patent/CN1068909A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943394A (en) * | 2013-01-23 | 2014-07-23 | 沈俊国 | Insulation barrier and arc-extinguishing type electric appliance switch contact head |
| CN110293511A (en) * | 2019-06-14 | 2019-10-01 | 平高集团有限公司 | A kind of moving arcing contact handling tooling |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05190064A (en) | 1993-07-30 |
| FR2679375A1 (en) | 1993-01-22 |
| EP0524088A1 (en) | 1993-01-20 |
| CA2074037A1 (en) | 1993-01-20 |
| BR9202729A (en) | 1993-03-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |