CN1226764C - Air circuit breaker - Google Patents
Air circuit breaker Download PDFInfo
- Publication number
- CN1226764C CN1226764C CNB01811461XA CN01811461A CN1226764C CN 1226764 C CN1226764 C CN 1226764C CN B01811461X A CNB01811461X A CN B01811461XA CN 01811461 A CN01811461 A CN 01811461A CN 1226764 C CN1226764 C CN 1226764C
- Authority
- CN
- China
- Prior art keywords
- air circuit
- contact
- magnetic sheet
- magnetic
- flexible conductor
- 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 - Fee Related
Links
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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
- H01H33/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
- H01H1/5822—Flexible connections between movable contact and terminal
Landscapes
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The present invention relates to an air circuit breaker which comprises a flexible conductor (7), a bearing shaft (6c) and magnetic plates (13), wherein the flexible conductor (7) is bent to be in an approximate U shape in order to enable a movable contact (6) with a movable joint (6a) to opened or closed in the opening direction or closing direction; the electromagnetic force which is generated by energizing current and enables the U-shaped part of the flexible conductor (7) to act in the opening direction is converted into the lever action of the press force of the movable contact (6a) by the bearing shaft (6c); the magnetic plates (13) are forcefully arranged among the poles of the U-shaped side surface of the flexible conductor and are provided with electromagnetic force, a plurality of magnetic plates (13) are arranged in parallel, and magnetic gaps (13a) are formed between every two magnetic plates (13). the magnetic plates between every two poles can be extended to the side part of the opening-closing joint from the U-shaped side surface of the flexible conductor; thus, the movable joint (6a) is not floated, the joints are inhibited from broadways deviating, the electric arc is not easily generated between the joints, and the energizing capacity is enlarged in a short time.
Description
Technical field
The present invention relates to a kind of multipole air circuit that cuts off super-high-current, especially relate to a kind of circuit breaker that is used to guarantee make and break contact part short time powered-on capacity.
Background technology
Fig. 5 is the side cross-sectional views of the major part of the conventional air circuit breaker shown in the flat 6-089650 communique of Japan Patent Publication Laid-Open, Fig. 6 is the stereogram of the make and break contact portion major part of conventional air circuit breaker, and Fig. 7 is provided in a side of the allocation plan of the magnetic component around the conventional air killer switch contact portion.
Among the figure, the 1st, the shell of air circuit, the 2nd, well-known toggle rod type switching mechanism.Such air circuit needs very big operating physical force, so utilize charging handle 2a or not shown motor and ratchet wheel 2b and eccentric cam 2c that the spring force of operating spring 2d generation is operated.
Contact lever 4 is connected with the lower link 2e of switching mechanism 2 by connecting pin 3, and this contact lever 4 is done rotatable supporting by contact lever pin 5.The 6th, movable contact, travelling contact 6a are fixed on the one end, are connected with the pliability conductor 7 that laminated thin plate conductor forms on the other end.The terminal of pliability conductor 7 is connected with downside terminal 8, is configured to be roughly U font from link position to the flexible conductor 7 of downside terminal 8.Being located near the central support holes 6b of movable contact 6 and the interior movable contact pin 6c that inserts of support holes of contact lever 4 can joltily support movable contact 6.The 9th, the upside terminal at one end is provided with the fixed contact 9a that can contact, leave with travelling contact 6a.The 10th, press spring, to the direction reinforcing of the connecting portion of movable contact 6 to the U font of opening flexible conductor 7.This reinforcing with movable contact pin 6c be fulcrum to movable contact 6 by the clockwise direction effect on the figure, become the press power of travelling contact 6a to fixed contact 9a.The 11st, be used for when failure of current, eliminating the arc-extinction device that produces electric arc between contact.The 12nd, be provided in each extremely alternate magnetic pole.The setting of this magnetic pole 12 makes its U font sidepiece that can cover flexible conductor 7, and travelling contact 6a floats and restrains during by super-high-current described later, so become the magnetic circuit of strengthening electromagnetic force.
Contact during below to conventional air circuit breaker fault current is pressed action and is described.When flowing through excessive fault current in the air circuit, usually, by pressing travelling contact 6a separative trend under the effect of electromagnetism reaction force that spring 10 is pushed to fixed contact 9a.Because this super-high-current is by flexible conductor 7, the directive effect that electromagnetic force is opened towards the U font of flexible conductor 7 even also do not float by the super-high-current contact, makes and is not taking place can to increase the short time powered-on capacity under the situation of electric arc between contact.
But the excessive fault current of such air circuit when opening circuit the load short circuit is 3 phase currents, and 3 utmost points pass through simultaneously.Therefore, the magnetic line of force that differs 120 degree phase places in being provided in alternate magnetic sheet 12 passes through simultaneously.Therefore, the cut-out electric current increases, then with magnetic sheet 12 magnetic saturation in the consecutive roots same-phase zone of electric current, and cancel out each other at the magnetic line of force in antiphase zone, the electromagnetic force (contact pressing force) of opening the U font of the flexible conductor 7 not increase with current value increases pro rata, fixed contact 9a is won with the electromagnetism reaction force that separates between the travelling contact 6a, and contact floats easily.Thereby even increase the thickness of slab of magnetic sheet 12, what can not obtain being expected prevents the effect that contact floats.
Again and since magnetic sheet 12 only be configured in flexible conductor 7 around, the influence of movable contact 6 Shou Xiang O pole fields is subjected to the effect of the past horizontal power that caused by the electromagnetic force from electrode current.Existing problems are: this cross force with travelling contact 6a towards laterally moving, make its with fixed contact 9a between produce electric arc, generation contact surface damage and can't improve the short time powered-on capacity.
The present invention does in order to address the above problem.The objective of the invention is to: a kind of air circuit is provided, even described air circuit fault current increases the influence that also can restrain the magnetic line of force of consecutive roots, can restrain floating of fixed contact 9a and travelling contact 6a, and the lateral shift of contact, the contact face is difficult for electric arc takes place, and can obtain big short time powered-on capacity.
Summary of the invention
Air circuit of the present invention comprises: for make have the movable contact that opens and closes the travelling contact in the contact towards opening and closing that direction can open and close and crooked, be shaped to the flexible conductor that roughly is the U font; The bolster that the U font portion of flexible conductor is converted to the leverage of travelling contact pressing force towards the electromagnetic force of opening directive effect with the electrical current generation; Reinforcement is configured in a plurality of configurations arranged side by side of magnetic sheet of electromagnetic force of side interpolar of the U font of flexible conductor, its gap becomes the magnetic gap.
Again, the magnetic sheet that makes each interpolar extends to the sidepiece that opens and closes contact from the side of the U font of flexible conductor.
Multipole switching contact is insulated in the alternate next door that isolates, wear insertion groove, in this insertion groove, insert, be provided with magnetic sheet with the space in suitable formation magnetic gap.
Again, magnetic sheet is divided into U font lateral parts that is configured in the flexible conductor and the barricade part that comprises the switching contact portion of movable contact, each insertion groove independently is arranged in the alternate next door.
Each magnetic sheet and each barricade are made of the duplexer of magnetic sheet.
As mentioned above, air circuit of the present invention, the magnetic line of force that will be produced from the electric current of the utmost point by magnetic space 13a separates with the magnetic line of force that the consecutive roots electric current produces, thus, even, also can reduce the magnetic saturation at magnetic sheet 13 places and the counteracting of the magnetic line of force because of a plurality of magnetic sheets make each extremely dephased electric current.Thereby, can make electromagnetic force (contact pressing force) that the U font of flexible conductor 7 opens easily with the increasing of electric current with being in proportion, restrain the contact that the electromagnetism reaction between contact causes and float.The magnetic line of force around the electric current of the magnetic sheet 14 maskable consecutive roots that the interpolar of the contact switching portion of travelling contact 6a and fixed contact 9a is provided with prevents the lateral shift that movable contact 6 causes because of the electromagnetic force from electrode current.
Thereby contact can not float and lateral shift during the super-high-current energising, can increase the short time powered-on capacity.
The accompanying drawing simple declaration
Fig. 1 is the longitdinal cross-section diagram of major part of the air circuit of the 1st example of the present invention.
Fig. 2 is the key diagram that the magnetic sheet of the 1st example is installed to shell.
Fig. 3 is the allocation plan that opens and closes contact portion magnetic sheet on every side that is located at of the 2nd example.
Fig. 4 is the magnetic sheet of the 3rd example and the allocation plan of shielding material.
Fig. 5 is the side cross-sectional views of the major part of conventional air circuit breaker.
Fig. 6 is the stereogram of the major part of conventional air circuit breaker switching contact portion.
Fig. 7 is provided in a side of the allocation plan of the magnetic component around the conventional air killer switch contact portion.
The preferred forms of invention
The 1st example
Fig. 1 is the longitdinal cross-section diagram of major part of the air circuit of the 1st example of the present invention, and Fig. 2 is the figure that the magnetic sheet of explanation the 1st example is installed to shell.
Among the figure 1～11 is identical with above-mentioned conventional apparatus, in this description will be omitted.The 13rd, magnetic sheet is provided in the sidepiece of the U font of flexible conductor 7.
This magnetic sheet 13 is made of a plurality of magnetic sheets that are provided in each interpolar of multipole switching portion, forms magnetic space 13a between plate.
As shown in Figure 2, position in the insertion groove 1b that magnetic sheet 13 inserts in the alternate next door 1a that is located at base, this base is made of the dielectric resin material of the shell 1 that forms air circuit.As magnetic space 13a, insertion groove 1b is set up in parallel with the central portion of the alternate next door 1a of the dielectric resin material of base moulding material, so that a plurality of magnetic sheet 13 parallel insertions and guarantee magnetic space 13a.
The air circuit of this structure, the magnetic line of force that will be produced from the electric current of the utmost point by magnetic space 13a separates with the magnetic line of force that Xiang O electrode current produces, even because of a plurality of magnetic sheets make each extremely dephased electric current, also can reduce magnetic saturation, magnetic line of force counteracting.Thereby,, can restrain the contact come-up that the electromagnetism reaction between contact causes with the easy increase of electromagnetic force (contact pressing force) that the U font of flexible conductor 7 is opened with electric current with being in proportion.
Thereby super-high-current when energising contact can not float the short time powered-on capacity is increased.
The 2nd example
Fig. 3 is the allocation plan that opens and closes contact portion magnetic sheet on every side that is located at of the 2nd example.Among the figure, 1,6～9 is identical with above-mentioned the 1st example.The 14th, a plurality of magnetic sheets.In the 2nd example, each magnetic sheet 14 is extended to the sidepiece of switching contact from the U font sidepiece of flexible conductor 7.A plurality of magnetic sheets 14 insert in the insertion groove (out-of-order) that accompanies the magnetic space 13a that is located at alternate next door 1a and be set up in parallel installs setting.
So, by magnetic sheet 14 is extended the sidepiece of configuration to the switching contact that comprises movable contact 6, the magnetic line of force on every side that the electric current of magnetic sheet 14 maskable consecutive roots causes can prevent that movable contact 6 from producing lateral shift because of the electromagnetic force that the electric current and the magnetic line of force around the consecutive roots from the utmost point produce.
Thereby, not only can restrain the contact that the increase of the electromagnetic force (contact pressing force) of the illustrated U font of opening flexible conductor 7 of above-mentioned the 1st example causes and float, can also restrain the lateral shift of movable contact 6, increase the short time powered-on capacity.
The 3rd example
Fig. 4 is the magnetic sheet of the 3rd example and the allocation plan of shielding material.Among the figure 1,6～9,13 identical with above-mentioned the 1st example.The 15th, barricade, described barricade 15 is different with magnetic sheet 13, each the extremely alternate configuration of sidepiece in the contact switching portion of movable contact 6 and travelling contact 6a and fixed contact 9a.Become the 1c of enhancing portion between magnetic sheet 13 and the barricade 15.
In above-mentioned the 2nd example, on alternate next door 1a, be provided with very long insertion groove from the U font sidepiece of flexible conductor 7 to the sidepiece of contact switching portion, insert magnetic sheet 14 in it.Therefore, the powerful electromagnetic force that is subjected to of magnetic sheet 14 makes the insertion groove sidewall produce the crack sometimes.Its countermeasure can adopt the method for thickening alternate next door 1a thickness, but the volume that can cause air circuit like this increases and not too suitable.For this reason, utilize segmenting structure, that is, make magnetic sheet 13 have the function of guaranteeing magnetic circuit, make barricade 14 have the function of shielding consecutive roots.Like this, when cutting off energising, the decline of no short time powered-on capacity with the thickness of traditional alternate next door 1a, can make the insertion groove of magnetic sheet 13 and barricade 15 independent respectively, and the 1c of enhancing portion is set, and structure can prevent that alternate next door 1a from producing the crack thus.And shell 1 is made by the insulating resin mould is integrally formed with alternate next door 1a.When in mould shell 1 being taken out, above-mentioned enhancing portion 1c place can become the butt position of effective pushing pin.
Barricade 15 in the above-mentioned explanation is made of a plurality of barricades with magnetic space 13a, but also makes such structure for the intensity of guaranteeing alternate next door 1a: make it have the 1c of enhancing portion, magnetic sheet 13 has a plurality of and barricade 15 has 1.
The 4th example
Secondly, with magnetic sheet 13,14 and barricade 15 every a plurality of configuration with magnetic space 13a.At this moment, although there has not been the influence of the magnetic line of force of consecutive roots, but the vortex flow that the magnetic line of force around the utmost point causes is with no magnetic space, only the magnetic sheet of 1 formation is compared with barricade and wanted big, and the magnetic sheet 13,14 that the eddy current losses in the common rated current scope causes and the heating of barricade 15 become the reason of energy loss and the rising of air break actuator temperature.
As countermeasure, the magnetic sheet that the surface is carried out weak insulation processing is stacked, forms magnetic sheet 13,14 and barricade 15, by this, can reduce eddy current losses, thereby can restrain heating.
As mentioned above, air circuit of the present invention, the magnetic current line that the magnetic line of force that will be produced from the electric current of the utmost point by magnetic space 13a and consecutive roots electric current produce carries out contact can not floated and use and be offset magnetic sheet and increase the flow that each utmost point is connected, and can reduce the counteracting of the magnetic saturation magnetic line of force at magnetic sheet 13 places yet.Thereby, can make electromagnetic force (contact pressing force) that the U font of flexible conductor 7 opens easily with the increasing of electric current with being in proportion, restrain the contact that the electromagnetism reaction between contact causes and float.The magnetic line of force around the electric current of the magnetic sheet 14 maskable consecutive roots that the interpolar of the contact switching portion of travelling contact 6a and fixed contact 9a is provided with prevents the lateral shift that movable contact 6 causes because of the electromagnetic force from electrode current.
Claims (7)
1. air circuit, described air circuit comprises: the multipole switching contact that is made of fixed contact and travelling contact, for the movable contact with described travelling contact can be opened and closed towards opening and closing direction, and bend to the roughly flexible conductor of U font, electrical current is produced, make the described U font portion of described flexible conductor convert the bolster of the tool leverage of described travelling contact pressing force to towards the electromagnetic force of opening directive effect, be configured in the side interpolar of the U font of described flexible conductor, be used to strengthen the magnetic sheet of above-mentioned electromagnetic force, it is characterized in that, this magnetic sheet is done a plurality of configurations arranged side by side, make its gap become the magnetic gap.
2. air circuit according to claim 1 is characterized in that, described magnetic sheet is extended to the interpolar of multipole switching contact.
3. air circuit according to claim 1 is characterized in that, described air circuit has the alternate next door that multipole switching contact is isolated in insulation, and described multipole switching contact is arranged on the insulating resin system housing that forms the air circuit shell; In this alternate next door, wear insertion groove, in this insertion groove, insert, be provided with magnetic sheet with the space that constitutes the magnetic gap.
4. air circuit according to claim 2 is characterized in that, described air circuit has the alternate next door that multipole switching contact is isolated in insulation, and described multipole switching contact is arranged on the insulating resin system housing that forms the air circuit shell; In this alternate next door, wear insertion groove, in this insertion groove, insert, be provided with magnetic sheet with the space that constitutes the magnetic gap.
5. according to each described air circuit of claim 3-4, it is characterized in that, magnetic sheet is divided into the magnetic sheet of the U font lateral parts that is configured in the flexible conductor and the barricade of switching contact portion, described switching contact portion comprises movable contact, and each insertion groove independently is arranged in the alternate next door.
6. according to each described air circuit of claim 1-4, it is characterized in that magnetic sheet is made of the duplexer of magnetic sheet.
7. air circuit according to claim 5 is characterized in that magnetic sheet and barricade are made of the duplexer of magnetic sheet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2001/006644 WO2003015114A1 (en) | 2001-08-02 | 2001-08-02 | Air circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1441956A CN1441956A (en) | 2003-09-10 |
| CN1226764C true CN1226764C (en) | 2005-11-09 |
Family
ID=11737615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB01811461XA Expired - Fee Related CN1226764C (en) | 2001-08-02 | 2001-08-02 | Air circuit breaker |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1414057B1 (en) |
| JP (1) | JP4599799B2 (en) |
| KR (1) | KR100520928B1 (en) |
| CN (1) | CN1226764C (en) |
| DE (1) | DE60143410D1 (en) |
| ES (1) | ES2351204T3 (en) |
| TW (1) | TW517257B (en) |
| WO (1) | WO2003015114A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4024726B2 (en) * | 2003-07-17 | 2007-12-19 | 三菱電機株式会社 | Multipole circuit breaker |
| DE10347148B4 (en) * | 2003-10-10 | 2006-01-19 | Moeller Gmbh | Switching device with easy interrupting rotary contact |
| WO2005073994A1 (en) * | 2004-01-28 | 2005-08-11 | Mitsubishi Denki Kabushiki Kaisha | Breaker |
| WO2007010608A1 (en) * | 2005-07-21 | 2007-01-25 | Mitsubishi Denki Kabushiki Kaisha | Breaker |
| CN101981647B (en) * | 2008-04-04 | 2013-10-30 | 三菱电机株式会社 | Short circuit detection apparatus for circuit breaker |
| FR2947667A1 (en) * | 2009-07-01 | 2011-01-07 | Schneider Electric Ind Sas | ASSISTANCE THROUGH MAGNETIC COMPENSATION DEVICE FOR REPULSION FORCES AND CONTACTOR COMPRISING SUCH A DEVICE |
| KR101168533B1 (en) * | 2011-03-14 | 2012-07-27 | 엘에스산전 주식회사 | Grounding switch |
| CN112635263B (en) * | 2020-12-30 | 2022-09-13 | 滁州博杰科技有限公司 | Electromagnetic auxiliary circuit breaker |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5925155U (en) * | 1982-08-07 | 1984-02-16 | 三菱電機株式会社 | Multi-pole circuit breaker |
| US4891617A (en) * | 1988-08-01 | 1990-01-02 | Westinghouse Electric Corp. | Rubber stops in outside poles |
| JPH0766736B2 (en) * | 1988-09-27 | 1995-07-19 | 寺崎電気産業株式会社 | Multi-pole electric switch |
| JP2633959B2 (en) * | 1989-06-30 | 1997-07-23 | 株式会社日立製作所 | Circuit breaker |
| JPH0689650A (en) * | 1992-09-07 | 1994-03-29 | Mitsubishi Electric Corp | Breaker |
| JP2001101962A (en) * | 1999-09-29 | 2001-04-13 | Mitsubishi Electric Corp | Circuit breaker |
-
2001
- 2001-08-02 KR KR10-2003-7004542A patent/KR100520928B1/en active IP Right Grant
- 2001-08-02 DE DE60143410T patent/DE60143410D1/en not_active Expired - Lifetime
- 2001-08-02 ES ES01955554T patent/ES2351204T3/en not_active Expired - Lifetime
- 2001-08-02 JP JP2002580697A patent/JP4599799B2/en not_active Expired - Fee Related
- 2001-08-02 WO PCT/JP2001/006644 patent/WO2003015114A1/en active IP Right Grant
- 2001-08-02 CN CNB01811461XA patent/CN1226764C/en not_active Expired - Fee Related
- 2001-08-02 EP EP01955554A patent/EP1414057B1/en not_active Expired - Lifetime
- 2001-08-13 TW TW090119741A patent/TW517257B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR100520928B1 (en) | 2005-10-17 |
| KR20030055272A (en) | 2003-07-02 |
| JP4599799B2 (en) | 2010-12-15 |
| EP1414057A1 (en) | 2004-04-28 |
| EP1414057B1 (en) | 2010-11-03 |
| DE60143410D1 (en) | 2010-12-16 |
| TW517257B (en) | 2003-01-11 |
| CN1441956A (en) | 2003-09-10 |
| WO2003015114A1 (en) | 2003-02-20 |
| JPWO2003015114A1 (en) | 2004-12-02 |
| ES2351204T3 (en) | 2011-02-01 |
| EP1414057A4 (en) | 2005-03-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051109 Termination date: 20190802 |
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| CF01 | Termination of patent right due to non-payment of annual fee |