EP1492138A1 - Air circuit breaker - Google Patents
Air circuit breaker Download PDFInfo
- Publication number
- EP1492138A1 EP1492138A1 EP02700721A EP02700721A EP1492138A1 EP 1492138 A1 EP1492138 A1 EP 1492138A1 EP 02700721 A EP02700721 A EP 02700721A EP 02700721 A EP02700721 A EP 02700721A EP 1492138 A1 EP1492138 A1 EP 1492138A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- stationary
- moving
- arcing
- arcing contact
- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/42—Impedances connected with contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
-
- 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
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
Definitions
- the present invention relates to an improvement in opening and closing contacts of an air circuit breaker.
- Fig. 4 is a side sectional view of a conventional air circuit breaker described in, for example, Japanese Patent Publication (unexamined) No. 90424/1990.
- reference numeral 1 is a housing formed of an insulating material
- numeral 2 is stationary conductors which are arranged in parallel on the housing 1 and are the same in number as poles, and in which a stationary contact 3 is fixed onto one end of each stationary conductor, and the other end is led out from the rear side of the housing 1 and forms a power supply side terminal 2a.
- Numeral 4 is a stationary arcing conductor extending from the stationary conductor 2 toward an arc suppressor described later
- numeral 5 is a stationary arcing contact fixed onto an end portion of the stationary arcing conductor 4.
- Numeral 6 is a moving contact that faces the stationary contact 3 and comes in contact with and moves away from the stationary contact 3
- numeral 7 is a moving member to which the moving contact 6 is fixed
- numeral 8 is a moving arcing conductor formed by extending the moving member 7 toward the arc suppressor
- numeral 9 is a moving arcing contact fixed onto an end portion of the moving arcing conductor 8.
- Numeral 10 is a contact arm rotatably holding the moving member 7, and numeral 11 is a contact arm shaft rotatably supporting the contact arm 10 on the housing 1.
- Numeral 12 is a terminal conductor, and the terminal conductor is fixed onto the housing 1 and led out from the rear side of the housing 1, and forms a power supply side terminal 12a.
- Numeral 13 is a flexible conductor movably connecting the moving member 7 to the terminal conductor 12.
- Numeral 14 is a contact pressure spring urging the moving member 7 toward an opening direction, and numeral 15 is a switch mechanism, numeral 16 is a shaft acting as the turning center of the moving member 7.
- Numeral 17 is an arc suppressor, and numeral 18 is a trip relay part.
- the switch mechanism 15 is comprised of a well- known toggle link mechanism, and opens and closes the moving member 7 in order to switch on and off the air circuit breaker. Under the state that the air circuit breaker is switched on, the switch mechanism 15 is hitched on a latch (not shown) engaged with the trip relay part 18 to keep the air circuit breaker on. If the hitched switch mechanism 15 is released from the latch, the air circuit breaker is switched off.
- Numeral 19 is a closing spring where closing drive force of the switch mechanism 15 is accumulated
- numeral 20 is a cam mechanism where a handle 21 or a motor not shown compresses the closing spring 19 and accumulates the force thereof.
- This type of air circuit breaker detects an overcurrent flowing through a connected load or an excessively large current due to an accident or the like, and the trip relay part 18 releases the hitched switch mechanism 15 from the latch, whereby the switch mechanism 15 comes to work.
- the contact arm 10, the shaft 16, and the contact arm shaft 11 are located so that the moving member 7 connected to the switch mechanism 15 oscillates in on-off operation. Oscillating operation of the moving member 7 is hereinafter described.
- the moving contact 6 When the air circuit breaker is on, the moving contact 6 is in contact with the stationary contact 3, but the moving arcing contact 9 is spaced away from the stationary arcing contact 5.
- the switch mechanism 15 raises the contact arm 10, whereby the moving contact 6 is slightly moved away from the stationary contact 3, and an arc through between the two contacts conducts. Subsequently, the moving member 7 is rotated clockwise round the shaft 16 pushed by the contact pressure spring 14 and, and the moving arcing contact 9 comes in contact with the stationary arcing contact 5.
- the moving member 7 When turning on, the moving member 7 rotates clockwise by the closing operation of the switch mechanism 15, and therefore the moving arcing contact 9 comes in contact with the stationary arcing contact 5 at first, whereby an electric current can conduct.
- the moving contact 6 When the moving contact 6 is further pushed by the switch mechanism 15 and comes in contact with the stationary contact 3, the moving member 7 rotates counterclockwise, the moving arcing contact 9 moves away from the stationary arcing contact 5, and the electric conduction shifts to the moving contact 6 and the stationary contact 3.
- the present invention was made to solve such a problem and has an object of providing an air circuit breaker at a reasonable cost, in which it is not necessary to use any contact made of a tungsten-silver alloy as the arcing contact through which an arc is induced by the arc suppressor 17, an arc is easily suppressed by current-limiting, and welding of the arcing contacts hardly occurs.
- An air circuit breaker includes: a stationary contact fixed on a stationary conductor; a moving member onto which a moving contact that is connected and disconnected with the mentioned stationary contact is fixed; a switch mechanism that opens and closes the moving member by osc illation; a stationary arcing contact disposed at an end portion of a stationary arcing conductor extending from the stationary conductor through a first resistor; and a moving arcing contact disposed at an end portion of a moving arcing conductor extending from the moving member through a second resistor, and in which when the switch mechanism switches on the moving member, the moving arcing contact comes in contact with the stationary arcing contact, and after bringing the moving contact into contact with the stationary contact, the moving arcing contact moves away from the stationary arcing contact; and when the switch mechanism switches off the moving member, the moving arcing contact comes in contact with the stationary arcing contact, and after moving the moving contact away from the stationary contact, the moving arcing contact is connected and disconnected with the stationary arcing
- the resistor is disposed either on the moving member side or on the stationary conductor side.
- Fig. 1 is a sectional view of an essential part of an air circuit breaker according to the present invention
- Fig. 2 is a perspective view of a current-carrying part of the air circuit breaker according to the invention
- Figs. 3 (A), (B) and (C) are explanatory views to explain opening and closing operation of the air circuit breaker according to the invention.
- reference numerals 1 to 4, 6 to 8, and 10 to 17 are the same as those in the above-mentioned conventional air circuit breaker, and further explanation of them is omitted here.
- Numeral 4a is a stationary arcing contact formed at an end portion of the stationary arcing conductor 4
- numeral 31 is a first resistor held in a conductible manner between the stationary conductor 2 and the stationary arcing conductor 4.
- Numeral 8a is a moving arcing contact formed at an end portion of the moving arcing conductor 8
- numeral 32 is a second resistor arranged in a conductible manner between the moving member 7 and the moving arcing conductor 8.
- FIG. 3 (A) shows a state that the air circuit breaker is on.
- the moving contact 6 is in contact with the stationary contact 3, and the moving arcing contact 8a is spaced away from the stationary arcing contact 4a.
- the electric current flows in order through the stationary conductor 2, the stationary contact 3, the moving contact 6, the moving member 7, the flexible conductor 13, and the terminal conductor 12.
- the switch mechanism 15 raises the shaft 16, and the moving member 7 turns clockwise by the urging force of the contact pressure spring 14. Accordingly, the moving contact 6 is slightly moved away from the stationary contact 3 and the electric current flows between the two contacts through an arc.
- the moving arcing contact 8a comes in contact with the stationary arcing contact 4a as shown in Fig. 3 (B). In this state, the current flows in order through the stationary conductor 2, the first resistor 31, the stationary arcing conductor 4, the stationary arcing contact 4a, the moving arcing contact 8a, the moving arcing conductor 8, the second resistor 32, the moving member 7, the flexible conductor 13, and the terminal conductor 12. Resistance of the first resistor 31 and the second resistor 32 interposed in the mentioned current flow limits the conduction of current.
- the two contacts are slightly opened due to impact and repulsion at the time of the closing operation, and the current flowing through this opening generates an arc.
- This arc has a high temperature that melts surface of the two contacts. In such a state, when the two contacts are connected again and the arc is extinguished, the molten portions on the surface of the contacts are cooled, and the welding occurs. In order to cope with this phenomenon, silver alloy contacts that hardly melt have been conventionally used in the art.
- the moving member 7 is arranged to oscillate at the time of on-off operation. Therefore, the current that flows when the moving arcing contact 8a comes in contact with the stationary arcing contact 4a is limited by the first resistor 31 and the second resistor 32, whereby the arc energy that causes welding is reduced.
- first resistor 31 and the second resistor 32 are made of sheet steel having a specific resistance higher than that of a copper material instead of a specific resistance alloy.
- both stationary arcing conductor 4 and moving arcing conductor 8 are provided with the first resistor 31 and the second resistor 32 respectively in the foregoing description, it is a matter of course that the same advantage is obtained in the case that either conductor is provided with a resistor.
- the air circuit breaker according to the invention is provided with a switch mechanism 15 that opens and closes a moving member 7 in an oscillating manner, a first resistor 31 interposed between a stationary conductor 2 and a stationary arcing contact 4a, and a second resistor 32 interposed between a moving member 7 and a moving arcing contact 8a.
- an electric current flowing through the two contacts at the time of opening and closing is limited by the first resistor 31 and the second resistor 32, thereby facilitating extinction of arc and preventing welding of the arcing contacts, and consequently, it is no more required to employ any contact made of a tungsten-silver alloy as the arcing contacts, which makes it possible to obtain an air circuit breaker at a reasonable cost.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
- The present invention relates to an improvement in opening and closing contacts of an air circuit breaker.
- Fig. 4 is a side sectional view of a conventional air circuit breaker described in, for example, Japanese Patent Publication (unexamined) No. 90424/1990.
- In the drawing,
reference numeral 1 is a housing formed of an insulating material, andnumeral 2 is stationary conductors which are arranged in parallel on thehousing 1 and are the same in number as poles, and in which astationary contact 3 is fixed onto one end of each stationary conductor, and the other end is led out from the rear side of thehousing 1 and forms a powersupply side terminal 2a.Numeral 4 is a stationary arcing conductor extending from thestationary conductor 2 toward an arc suppressor described later, andnumeral 5 is a stationary arcing contact fixed onto an end portion of thestationary arcing conductor 4. -
Numeral 6 is a moving contact that faces thestationary contact 3 and comes in contact with and moves away from thestationary contact 3,numeral 7 is a moving member to which the movingcontact 6 is fixed,numeral 8 is a moving arcing conductor formed by extending themoving member 7 toward the arc suppressor, and numeral 9 is a moving arcing contact fixed onto an end portion of the movingarcing conductor 8. - Numeral 10 is a contact arm rotatably holding the moving
member 7, andnumeral 11 is a contact arm shaft rotatably supporting thecontact arm 10 on thehousing 1.Numeral 12 is a terminal conductor, and the terminal conductor is fixed onto thehousing 1 and led out from the rear side of thehousing 1, and forms a powersupply side terminal 12a. Numeral 13 is a flexible conductor movably connecting the movingmember 7 to theterminal conductor 12.Numeral 14 is a contact pressure spring urging the movingmember 7 toward an opening direction, andnumeral 15 is a switch mechanism,numeral 16 is a shaft acting as the turning center of the movingmember 7.Numeral 17 is an arc suppressor, andnumeral 18 is a trip relay part. - The
switch mechanism 15 is comprised of a well- known toggle link mechanism, and opens and closes the movingmember 7 in order to switch on and off the air circuit breaker. Under the state that the air circuit breaker is switched on, theswitch mechanism 15 is hitched on a latch (not shown) engaged with thetrip relay part 18 to keep the air circuit breaker on. If the hitchedswitch mechanism 15 is released from the latch, the air circuit breaker is switched off.Numeral 19 is a closing spring where closing drive force of theswitch mechanism 15 is accumulated, andnumeral 20 is a cam mechanism where ahandle 21 or a motor not shown compresses theclosing spring 19 and accumulates the force thereof. - This type of air circuit breaker detects an overcurrent flowing through a connected load or an excessively large current due to an accident or the like, and the
trip relay part 18 releases thehitched switch mechanism 15 from the latch, whereby theswitch mechanism 15 comes to work. This pushes upward thecontact arm 10 round thecontact arm shaft 11 by a force of thecontact pressure spring 14, and the movingmember 7 is rotated counterclockwise round theshaft 16. Accordingly, the movingcontact 6 is moved away from thestationary contact 3, and the electric current flowing between the two contacts is interrupted. - The
contact arm 10, theshaft 16, and thecontact arm shaft 11 are located so that the movingmember 7 connected to theswitch mechanism 15 oscillates in on-off operation. Oscillating operation of the movingmember 7 is hereinafter described. - When the air circuit breaker is on, the moving
contact 6 is in contact with thestationary contact 3, but the moving arcing contact 9 is spaced away from thestationary arcing contact 5. When turning off, theswitch mechanism 15 raises thecontact arm 10, whereby the movingcontact 6 is slightly moved away from thestationary contact 3, and an arc through between the two contacts conducts. Subsequently, the movingmember 7 is rotated clockwise round theshaft 16 pushed by thecontact pressure spring 14 and, and the moving arcing contact 9 comes in contact with thestationary arcing contact 5. By the raising operation of theswitch mechanism 15, while the moving arcing contact 9 being kept in contact with the stationary arcingcontact 5, the movingcontact 6 is largely moved away from thestationary contact 3 using this contacting point as a fulcrum, thereby the arc between the contacts is extended and the current flow shifts mainly to the moving arcing contact 9 and the stationary arcingcontact 5. By the operation of theswitch mechanism 15, the movingmember 7 is rotated counterclockwise, the moving arcing contact 9 moves away from thestationary arcing contact 5, and the arc generated there is induced and extinguished by thearc suppressor 17. - When turning on, the moving
member 7 rotates clockwise by the closing operation of theswitch mechanism 15, and therefore the moving arcing contact 9 comes in contact with the stationary arcingcontact 5 at first, whereby an electric current can conduct. When the movingcontact 6 is further pushed by theswitch mechanism 15 and comes in contact with thestationary contact 3, the movingmember 7 rotates counterclockwise, the moving arcing contact 9 moves away from the stationary arcingcontact 5, and the electric conduction shifts to the movingcontact 6 and thestationary contact 3. - In the conventional air circuit breaker as described above, the arc generated at the time of turning off shifts to the moving arcing contact 9 and the stationary arcing
contact 5, and the arc is induced and extinguished by thearc suppressor 17. Therefore, for the purpose of resisting to the wear due to arc spark generated at the time of turning off and preventing an arcing contact from being welded described later, it is necessary to use contacts made of a tungsten-silver alloy as the stationary arcingcontact 5 and the moving arcing contact 9. - The present invention was made to solve such a problem and has an object of providing an air circuit breaker at a reasonable cost, in which it is not necessary to use any contact made of a tungsten-silver alloy as the arcing contact through which an arc is induced by the
arc suppressor 17, an arc is easily suppressed by current-limiting, and welding of the arcing contacts hardly occurs. - An air circuit breaker according to the invention includes: a stationary contact fixed on a stationary conductor; a moving member onto which a moving contact that is connected and disconnected with the mentioned stationary contact is fixed; a switch mechanism that opens and closes the moving member by osc illation; a stationary arcing contact disposed at an end portion of a stationary arcing conductor extending from the stationary conductor through a first resistor; and a moving arcing contact disposed at an end portion of a moving arcing conductor extending from the moving member through a second resistor, and
in which when the switch mechanism switches on the moving member, the moving arcing contact comes in contact with the stationary arcing contact, and after bringing the moving contact into contact with the stationary contact, the moving arcing contact moves away from the stationary arcing contact; and when the switch mechanism switches off the moving member, the moving arcing contact comes in contact with the stationary arcing contact, and after moving the moving contact away from the stationary contact, the moving arcing contact is connected and disconnected with the stationary arcing contact by oscillation. - It is preferable that the resistor is disposed either on the moving member side or on the stationary conductor side.
-
- Fig. 1 is a sectional view of an essential part of an air circuit breaker according to the present invention.
- Fig. 2 is a perspective view of a current-carrying part of the air circuit breaker according to the invention.
- Figs. 3 (A), (B) and (C) are explanatory views to explain opening and closing operation of the air circuit breaker according to the invention.
- Fig. 4 is a side sectional view of an air circuit breaker according to a prior art.
- Fig. 1 is a sectional view of an essential part of an air circuit breaker according to the present invention, Fig. 2 is a perspective view of a current-carrying part of the air circuit breaker according to the invention, and Figs. 3 (A), (B) and (C) are explanatory views to explain opening and closing operation of the air circuit breaker according to the invention.
- In the drawings,
reference numerals 1 to 4, 6 to 8, and 10 to 17 are the same as those in the above-mentioned conventional air circuit breaker, and further explanation of them is omitted here. Numeral 4a is a stationary arcing contact formed at an end portion of thestationary arcing conductor 4, andnumeral 31 is a first resistor held in a conductible manner between thestationary conductor 2 and thestationary arcing conductor 4. Numeral 8a is a moving arcing contact formed at an end portion of the movingarcing conductor 8, andnumeral 32 is a second resistor arranged in a conductible manner between the movingmember 7 and the movingarcing conductor 8. - Operation of the air circuit breaker according to the invention is hereinafter described with reference to Figs. 3 (A), (B) and (C). Fig. 3 (A) shows a state that the air circuit breaker is on. Referring to the drawing, the moving
contact 6 is in contact with thestationary contact 3, and the moving arcingcontact 8a is spaced away from thestationary arcing contact 4a. In this state, the electric current flows in order through thestationary conductor 2, thestationary contact 3, the movingcontact 6, the movingmember 7, theflexible conductor 13, and theterminal conductor 12. - When starting an interrupting operation upon detection of any excessive current, the
switch mechanism 15 raises theshaft 16, and the movingmember 7 turns clockwise by the urging force of thecontact pressure spring 14. Accordingly, the movingcontact 6 is slightly moved away from thestationary contact 3 and the electric current flows between the two contacts through an arc. When turning the movingmember 7 further, the moving arcingcontact 8a comes in contact with thestationary arcing contact 4a as shown in Fig. 3 (B). In this state, the current flows in order through thestationary conductor 2, thefirst resistor 31, thestationary arcing conductor 4, thestationary arcing contact 4a, the moving arcingcontact 8a, the movingarcing conductor 8, thesecond resistor 32, themoving member 7, theflexible conductor 13, and theterminal conductor 12. Resistance of thefirst resistor 31 and thesecond resistor 32 interposed in the mentioned current flow limits the conduction of current. - As a result of this current-limiting action, while an accidental electric current and so on being limited, the moving arcing
contact 8a moves away from thestationary arcing contact 4a as shown in Fig. 3 (C). In this state, an arc is generated between thestationary arcing contact 4a and the moving arcingcontact 8a. However, since the arc energy is reduced as a result of limiting the electric current, the arc is suppressed easily. - Welding of the contacts may occur at the time of turning on under the condition that a considerable large amount of current is flowing through the mentioned air circuit breaker. This welding is reduced according to the construction of the invention. The reason is now described below. By the closing operation of the
switch mechanism 15, first themoving arcingcontact 8a comes in contact with thestationary arcing contact 4a, whereby a current flows between the two contacts. - The two contacts are slightly opened due to impact and repulsion at the time of the closing operation, and the current flowing through this opening generates an arc. This arc has a high temperature that melts surface of the two contacts. In such a state, when the two contacts are connected again and the arc is extinguished, the molten portions on the surface of the contacts are cooled, and the welding occurs. In order to cope with this phenomenon, silver alloy contacts that hardly melt have been conventionally used in the art.
- On the other hand, in the construction of the invention, the moving
member 7 is arranged to oscillate at the time of on-off operation. Therefore, the current that flows when the movingarcing contact 8a comes in contact with thestationary arcing contact 4a is limited by thefirst resistor 31 and thesecond resistor 32, whereby the arc energy that causes welding is reduced. - Even if welding occurs at the portion where the moving
arcing contact 8a is in contact with thestationary arcing contact 4a, the movingmember 7 is pushed down counterclockwise using the contact portion as a fulcrum until the movingcontact 6 comes in contact with thestationary contact 3, and therefore the contact portion once welded is separated by the action of levers. When the movingcontact 6 comes in contact with thestationary contact 3, the current shifts to the movingcontact 6 and thestationary contact 3 where resistance is small and, subsequently, the portion where the movingarcing contact 8a is in contact with thestationary arcing contact 4a is separated. As a result, this portion is free from generation of any arc, and wear of the two contacts caused by an arc does not take place. - It is, therefore, possible to employ any conductive material mainly composed of copper as the
stationary arcing conductor 4 including thestationary arcing contact 4a and the movingarcing conductor 8 including the movingarcing contact 8a. Consequently, it is not necessary to use any arc contact made of a tungsten-silver alloy. - It is also preferable that the
first resistor 31 and thesecond resistor 32 are made of sheet steel having a specific resistance higher than that of a copper material instead of a specific resistance alloy. - Although both
stationary arcing conductor 4 and movingarcing conductor 8 are provided with thefirst resistor 31 and thesecond resistor 32 respectively in the foregoing description, it is a matter of course that the same advantage is obtained in the case that either conductor is provided with a resistor. - As described above, the air circuit breaker according to the invention is provided with a
switch mechanism 15 that opens and closes a movingmember 7 in an oscillating manner, afirst resistor 31 interposed between astationary conductor 2 and astationary arcing contact 4a, and asecond resistor 32 interposed between a movingmember 7 and a movingarcing contact 8a. In this circuit breaker, when theswitch mechanism 15 switches on the movingmember 7, a movingcontact 6 comes in contact with astationary contact 3 while keeping the movingarcing contact 8a in contact with thestationary arcing contact 4a, and thereafter the movingarcing contact 8a moves away from thestationary arcing contact 4a, and when theswitch mechanism 15 switches off the movingmember 7, the movingarcing contact 8a comes in contact with thestationary arcing contact 4a, and after the movingcontact 6 moves away from thestationary contact 3, the movingarcing contact 8a is connected and disconnected with thestationary arcing contact 4a in an oscillating manner. As a result, an electric current flowing through the two contacts at the time of opening and closing is limited by thefirst resistor 31 and thesecond resistor 32, thereby facilitating extinction of arc and preventing welding of the arcing contacts, and consequently, it is no more required to employ any contact made of a tungsten-silver alloy as the arcing contacts, which makes it possible to obtain an air circuit breaker at a reasonable cost.
Claims (2)
- An air circuit breaker comprising:a stationary contact fixed on a stationary conductor;a moving member onto which a moving contact that is connected and disconnected with said stationary contact is fixed;a switch mechanism that opens and closes said moving member by oscillation;a stationary arcing contact disposed at an end portion of a stationary arcing conductor extending from said stationary conductor toward an arc suppressor through a first resistor; anda moving arcing contact disposed at an end portion of a moving arcing conductor extending from said moving member toward said arc suppressor through a second resistor;characterized in that when the switch mechanism switches on said moving member, said moving arcing contact comes in contact with said stationary arcing contact, and after bringing said moving contact into contact with said stationary contact, said moving arcing contact moves away from said stationary arcing contact; and when said switch mechanism switches off said moving member, said moving arcing contact comes in contact with said stationary arcing contact, and after moving said moving contact away from said stationary contact, said moving arcing contact moves away from said stationary arcing contact by oscillation.
- The circuit breaker according to claim 1, wherein the resistor is disposed either on the moving member side or on the stationary conductor side.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/001623 WO2003071566A1 (en) | 2002-02-22 | 2002-02-22 | Air circuit breaker |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1492138A1 true EP1492138A1 (en) | 2004-12-29 |
EP1492138A4 EP1492138A4 (en) | 2006-08-02 |
EP1492138B1 EP1492138B1 (en) | 2010-04-28 |
Family
ID=27742305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02700721A Expired - Lifetime EP1492138B1 (en) | 2002-02-22 | 2002-02-22 | Air circuit breaker |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1492138B1 (en) |
JP (1) | JP4030504B2 (en) |
KR (1) | KR100496596B1 (en) |
CN (1) | CN1215511C (en) |
DE (1) | DE60236214D1 (en) |
ES (1) | ES2342047T3 (en) |
TW (1) | TW556240B (en) |
WO (1) | WO2003071566A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100442411C (en) * | 2006-04-26 | 2008-12-10 | 王光顺 | Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7362551B2 (en) * | 2001-02-01 | 2008-04-22 | Hydro-Aire, Inc. | Aircraft applicable circuit imbalance detection and circuit interrupter and packaging thereof |
DE102004063185A1 (en) * | 2004-10-18 | 2006-04-20 | Jan Forster | Building component with supporting walls, ceilings and/or floors, comprises individual plaster blocks that can be dismantled |
JP2009134995A (en) * | 2007-11-30 | 2009-06-18 | Mitsubishi Electric Corp | Air circuit breaker |
US7935902B2 (en) * | 2008-04-15 | 2011-05-03 | General Electric Company | Contact assembly of circuit breaker |
CN110098517B (en) * | 2018-01-29 | 2021-06-04 | 北京天诚同创电气有限公司 | DC socket |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5260533A (en) * | 1991-10-18 | 1993-11-09 | Westinghouse Electric Corp. | Molded case current limiting circuit breaker |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0290423A (en) * | 1988-09-26 | 1990-03-29 | Mitsubishi Electric Corp | Arc extinguishing device of circuit breaker |
JPH0290422A (en) * | 1988-09-26 | 1990-03-29 | Mitsubishi Electric Corp | Circuit breaker |
JPH0311511A (en) * | 1989-06-07 | 1991-01-18 | Mitsubishi Electric Corp | Gas switch |
-
2002
- 2002-02-22 CN CNB028045343A patent/CN1215511C/en not_active Expired - Fee Related
- 2002-02-22 ES ES02700721T patent/ES2342047T3/en not_active Expired - Lifetime
- 2002-02-22 EP EP02700721A patent/EP1492138B1/en not_active Expired - Lifetime
- 2002-02-22 WO PCT/JP2002/001623 patent/WO2003071566A1/en active IP Right Grant
- 2002-02-22 DE DE60236214T patent/DE60236214D1/en not_active Expired - Lifetime
- 2002-02-22 JP JP2003570376A patent/JP4030504B2/en not_active Expired - Fee Related
- 2002-02-22 KR KR10-2003-7008040A patent/KR100496596B1/en active IP Right Grant
- 2002-03-01 TW TW091103819A patent/TW556240B/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5260533A (en) * | 1991-10-18 | 1993-11-09 | Westinghouse Electric Corp. | Molded case current limiting circuit breaker |
Non-Patent Citations (1)
Title |
---|
See also references of WO03071566A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100442411C (en) * | 2006-04-26 | 2008-12-10 | 王光顺 | Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker |
Also Published As
Publication number | Publication date |
---|---|
DE60236214D1 (en) | 2010-06-10 |
EP1492138A4 (en) | 2006-08-02 |
ES2342047T3 (en) | 2010-07-01 |
EP1492138B1 (en) | 2010-04-28 |
CN1215511C (en) | 2005-08-17 |
WO2003071566A1 (en) | 2003-08-28 |
CN1493084A (en) | 2004-04-28 |
JP4030504B2 (en) | 2008-01-09 |
KR20030086582A (en) | 2003-11-10 |
TW556240B (en) | 2003-10-01 |
JPWO2003071566A1 (en) | 2005-06-16 |
KR100496596B1 (en) | 2005-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2009054389A (en) | Circuit breaker | |
US4554427A (en) | Molded case circuit breaker with movable lower electrical contact | |
KR20060093252A (en) | Breaker of providing successive trip mechanism based on positive temperature coefficient current-limiting device | |
US4644307A (en) | Current limiting type circuit breaker | |
US20080186643A1 (en) | Voltage surge protection device with a movable contact comprising selective disconnection means against short-circuits | |
EP1492138B1 (en) | Air circuit breaker | |
EP0100367B1 (en) | Circuit breaker | |
JPH0336264B2 (en) | ||
EP1471553B1 (en) | Air circuit breaker | |
US4598187A (en) | Current limiting circuit breaker | |
CA1331998C (en) | Circuit breaker with low voltage contact structure | |
US5874873A (en) | Electric control apparatus | |
US11817283B2 (en) | Electrical switching system | |
JP4329922B2 (en) | Circuit breaker | |
US3602676A (en) | Knife blade switch with toggle operating means and means for fastening the knife blade to a tie bar | |
KR200210953Y1 (en) | structure of electric circuitin C/B | |
JP2734678B2 (en) | Contact device | |
KR100475067B1 (en) | Arc extinguishing structure for circuit braker | |
KR880000702B1 (en) | Circuit breaker | |
KR100357205B1 (en) | Circuit breaker | |
JP2734615B2 (en) | Contact device | |
JP5199712B2 (en) | Contact device | |
JPS6350807B2 (en) | ||
JP2011081988A (en) | Circuit breaker | |
JPH0574318A (en) | Switch |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20030324 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MITSUBISHI DENKI KABUSHIKI KAISHA |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20060705 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MITSUBISHI ELECTRIC CORPORATION |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 60236214 Country of ref document: DE Date of ref document: 20100610 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2342047 Country of ref document: ES Kind code of ref document: T3 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: S27 Free format text: APPLICATION FILED; APPLICATION TO AMEND SPECIFICATION UNDER SECTION 27 FILED ON 26 JULY 2010 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: S27 Free format text: APPLICATION OPEN FOR OPPOSITION; PATENTS FORM 15 GIVING THE COMPTROLLER NOTICE OF OPPOSITION TO THE AMENDMENTS. YOU ALSO NEED TO FILE TWO COPIES OF A STATEMENT SETTING OUR FULLY THE FACTS OF YOUR CASE AND THE RELIEF THAT YOU ARE SEEKING.FOR A COPY OF THESE AMENDMENTS, PHONE LITIGATION SECTION (01633 814376) |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20110131 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: S27 Free format text: SPECIFICATION AMENDED; APPLICATION FOR AMENDMENT UNDER SECTION 27 FILED 26 JULY 2010 ALLOWED ON 10 OCTOBER 2011 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 746 Effective date: 20130510 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R084 Ref document number: 60236214 Country of ref document: DE Effective date: 20130503 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: GC2A Effective date: 20130702 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150222 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 15 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150222 |
|
PGRI | Patent reinstated in contracting state [announced from national office to epo] |
Ref country code: IT Effective date: 20180104 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20190111 Year of fee payment: 18 Ref country code: ES Payment date: 20190304 Year of fee payment: 18 Ref country code: IT Payment date: 20190221 Year of fee payment: 18 Ref country code: DE Payment date: 20190212 Year of fee payment: 18 Ref country code: GB Payment date: 20190220 Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 60236214 Country of ref document: DE |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20200222 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200229 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200901 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200222 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20210706 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200223 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210228 |