CN108648938B - Conductive loop system with excellent magnetic blowing effect - Google Patents
Conductive loop system with excellent magnetic blowing effect Download PDFInfo
- Publication number
- CN108648938B CN108648938B CN201810626350.7A CN201810626350A CN108648938B CN 108648938 B CN108648938 B CN 108648938B CN 201810626350 A CN201810626350 A CN 201810626350A CN 108648938 B CN108648938 B CN 108648938B
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- CN
- China
- Prior art keywords
- arc
- contact
- moving contact
- equipotential
- moving
- Prior art date
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Links
- 230000000694 effects Effects 0.000 title claims abstract description 16
- 238000007664 blowing Methods 0.000 title claims abstract description 14
- 230000003068 static effect Effects 0.000 claims abstract description 32
- 238000010891 electric arc Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 230000002146 bilateral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a conductive loop system with excellent magnetic blowing effect, which is characterized by comprising a release, wherein the release is fixedly connected with a static row; the fixed row is provided with a fixed contact and a fixed contact arc striking sheet which are connected, and a movable contact is arranged below the fixed row; a moving contact equipotential arc striking sheet is arranged below the moving contact; the moving contact swings up and down around the rotating shaft between the fixed contact and the moving contact equipotential striking plate; when the movable contact swings upwards to a proper position, the movable contact is contacted with the static contact; when the moving contact swings downwards in place, the moving contact is contacted with the moving contact equipotential striking plate or the distance is similar; the arc-extinguishing chamber is arranged on the right sides of the static row and the moving contact, and the arc-extinguishing chamber is provided with arc-extinguishing grid sheets. The conductive loop system provided by the invention can reliably repel the contact when a short circuit occurs, and limit the rise of the short circuit current. In addition, the invention has excellent magnetic blowing effect, can rapidly transfer electric arcs, effectively protect dynamic and static contacts and improve the high-voltage breaking capacity of products.
Description
Technical Field
The invention relates to a conductive loop system used in a molded case circuit breaker.
Background
In addition to normal load rated current, the circuit breaker also needs to break abnormal fault current, an arc can be generated in the breaking process, the arc temperature is extremely high, current-carrying parts of the circuit breaker can be burnt for a long time, and serious and even direct burning is realized. How to transfer the arc to the arc chute quickly has become an important point in the development of circuit breakers. Common ways are: the gas generating material separates out gas at high temperature to blow arc or uses Lorentz force to magnetically blow transfer arc.
Disclosure of Invention
The purpose of the invention is that: the electric arc can be quickly transferred to the arc extinguishing chamber, and the magnetic blow-out effect is excellent.
In order to achieve the above purpose, the technical scheme of the invention is to provide a conductive loop system with excellent magnetic blowing effect, which is characterized by comprising a release, wherein the release is fixedly connected with a static row; the static row is provided with a static contact and a static contact arc striking sheet, the static contact is fixed on the static row, the static contact is contacted with the static contact arc striking sheet, and a moving contact is arranged below the static row; one end of the moving contact is connected with the rotating shaft, the other end of the moving contact is provided with a moving contact, the arc part connected with the moving contact is a moving contact arc angle, and a moving contact equipotential arc striking sheet is arranged below the moving contact; the moving contact swings up and down around the rotating shaft between the fixed contact and the moving contact equipotential striking plate; when the movable contact swings upwards to a proper position, the movable contact contacts with the fixed contact, and after short-circuit current occurs, the movable contact swings downwards under the action of electric repulsion force to directly open an arc; in the process that the moving contact swings from top to bottom, the arc root at one side of the electric arc moves from the upper part of the fixed contact to the arc striking plate of the fixed contact, and meanwhile, the arc root at the other side of the electric arc moves from the upper part of the moving contact to the arc angle of the moving contact; when the moving contact swings downwards in place, the arc angle of the moving contact is contacted with or is close to the equipotential striking plate of the moving contact, and the arc jumps from the arc angle of the moving contact to the equipotential striking plate of the moving contact; the arc-extinguishing chamber is arranged on the right sides of the static row and the moving contact, and the arc-extinguishing chamber is provided with arc-extinguishing grid sheets.
Preferably, the top of the arc extinguishing chamber is communicated with the upper air outlet; the bottom of the arc extinguishing chamber is communicated with the lower air outlet.
The conductive loop system provided by the invention can reliably repel the contact when a short circuit occurs, and limit the rise of the short circuit current. In addition, the invention has excellent magnetic blowing effect, can rapidly transfer electric arcs, effectively protect dynamic and static contacts and improve the high-voltage breaking capacity of products.
Drawings
FIG. 1 is a schematic diagram of a conductive loop system with excellent magnetic blowing effect according to the present invention;
fig. 2 to 5 are schematic diagrams of the working process of the present invention, in which the dotted arrow is the current direction, the solid arrow is the force direction, the dotted line is the arc, the black dot indicates the magnetic field direction, the right hand rule indicates that the vertical screen is outward, and if the current direction is as shown, the magnetic field direction will be the same when the current is reversed, and the generated force direction is unchanged.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
As shown in fig. 1, the invention provides a conductive loop system with excellent magnetic blowing effect, which comprises a release 1, wherein the release 1 and a static row 2 are fixed through screws. The static row 2 is welded with a static contact 3 and a static contact arc striking plate 4, the lower end of the static row 2 is contacted with the static contact arc striking plate 4, and the static contact arc striking plate 4 extends to the arc extinguishing chamber all the time. The lower part of the fixed row 2 is provided with a moving contact 5, one end of the moving contact 5 is connected with a rotating shaft 6, and the moving contact is connected with a moving contact equipotential striking plate 8 through a soft connecting wire. The other end of the movable contact 5 is provided with a movable contact 7, and an arc characteristic part matched with the movable contact 7 defines the end as a movable contact arc angle. A moving contact equipotential arc striking sheet 8 is arranged below the moving contact 5, and the moving contact equipotential arc striking sheet 8 guides the electric arc to the arc extinguishing chamber. The moving contact 5 can swing up and down between the fixed contact 3 and the moving contact equipotential striking plate 8 around the rotating shaft 6. When the movable contact 5 swings upwards to a proper position, the movable contact 7 contacts with the fixed contact 3; after the moving contact 5 swings downwards in place, the moving contact 5 is contacted with or is close to the moving contact equipotential striking plate 8. The arc-extinguishing chamber is positioned on the right side of the static row 2 and the moving contact 5, and the arc-extinguishing chamber is provided with an arc-extinguishing grid sheet 9. The top of the arc extinguishing chamber is communicated with the upper air outlet; the bottom of the arc extinguishing chamber is communicated with the lower air outlet. The magnetic blowing effect near the static contact arc striking plate 4 points to the lower air outlet, and the magnetic blowing effect at the equipotential arc striking plate position of the moving contact points to the upper air outlet.
The included angle of the two-side arc running channels formed by the static contact arc striking sheet and the moving contact equipotential arc striking sheet is approximately 180 degrees, the arc roots at the two sides still have a strong magnetic blowing effect, the arc can be drawn to the longest, and the arc roots at the two sides are transferred to the corresponding two air outlets.
With reference to fig. 2 to 5, the working process of the present invention is as follows:
when short-circuit current occurs, the current on the movable contact and the static contact is reversed, the movable contact 5 is subjected to the action of electric repulsive force, and the arc discharge is directly opened, so that the short-circuit current is limited to rise, as shown in fig. 2. The pulled arc is acted by Lorentz force of the current of the moving contact and the static contact, one side of the arc moves from the static contact to the static contact striking plate 4, and the other side of the arc moves from the moving contact to the moving contact. The whole stress direction points to the direction of the arc extinguishing grid plate 9, so that the movable contact and the static contact are effectively protected, and the arc is further elongated, as shown in fig. 3 and 4. When the moving contact 5 is opened to the maximum position (close to the moving contact equipotential arc striking sheet 8), the electric arc jumps to the moving contact equipotential arc striking sheet 8 from the moving contact arc angle, and the whole section of electric arc completely enters the arc extinguishing grid sheet 9 to match with the upper air outlet and the lower air outlet, so that the electric arc is transferred and extinguished, as shown in fig. 5.
In addition, compared with other types of structures, the conductive loop system provided by the invention has larger opening distance and better current limiting capacity and isolation effect. In addition, the invention has larger arc-extinguishing chamber, higher arc-extinguishing capacity and improves the monopole breaking capacity of the product.
Claims (1)
1. The conductive loop system with the excellent magnetic blowing effect is characterized by comprising a release (1), wherein the release (1) is fixedly connected with a static row (2); a stationary contact (3) and a stationary contact arc striking plate (4) are arranged on the stationary bar (2), the stationary contact (3) is fixed on the stationary bar (2), the stationary contact (3) is contacted with the stationary contact arc striking plate (4), and a moving contact (5) is arranged below the stationary bar (2); one end of the moving contact (5) is connected with the rotating shaft (6) and is connected with the moving contact equipotential striking plate (8) through soft connection, the other end of the moving contact (5) is provided with a moving contact (7), the arc characteristic part matched with the moving contact (7) is a moving contact arc angle, and the moving contact equipotential striking plate (8) is arranged below the moving contact (5); the moving contact (5) swings up and down around the rotating shaft (6) between the fixed contact (3) and the moving contact equipotential striking plate (8); when the movable contact (5) swings upwards to a proper position, the movable contact (7) contacts with the fixed contact (3), and after short-circuit current occurs, the movable contact (5) swings downwards under the action of electric repulsion force to directly open an arc; in the process that the movable contact (5) swings from top to bottom, an arc root at one side of the electric arc moves from the fixed contact to an arc striking piece (4) of the fixed contact, and at the same time, an arc root at the other side of the electric arc moves from the upper side of the movable contact to an arc angle of the movable contact; when the moving contact (5) swings downwards to a proper position, the moving contact (5) is contacted with the moving contact equipotential arc striking piece (8), and the arc jumps from the arc angle of the moving contact to the moving contact equipotential arc striking piece (8); the whole arc completely enters an arc-extinguishing chamber under the action of electromagnetic force, the arc-extinguishing chamber is arranged on the right sides of the static row (2) and the moving contact (5), and an arc-extinguishing grid sheet (9) is arranged in the arc-extinguishing chamber; the top of the arc extinguishing chamber is communicated with the upper air outlet; the bottom of the arc extinguishing chamber is communicated with the lower air outlet; the included angle of the bilateral arc running channels formed by the fixed contact arc striking sheet (4) and the moving contact equipotential arc striking sheet (8) is approximately 180 degrees, the magnetic blowing effect near the fixed contact arc striking sheet (4) points to the lower air outlet, and the magnetic blowing effect at the position of the moving contact equipotential arc striking sheet (8) points to the upper air outlet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110750948.9A CN113593994B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
| CN201810626350.7A CN108648938B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810626350.7A CN108648938B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110750948.9A Division CN113593994B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108648938A CN108648938A (en) | 2018-10-12 |
| CN108648938B true CN108648938B (en) | 2023-12-05 |
Family
ID=63752620
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110750948.9A Active CN113593994B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
| CN201810626350.7A Active CN108648938B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110750948.9A Active CN113593994B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN113593994B (en) |
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| EP1615246A1 (en) * | 2004-07-05 | 2006-01-11 | ABB Schweiz AG | Arc extinguishing device for circuit breaker |
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| CN207199555U (en) * | 2017-09-27 | 2018-04-06 | 常熟开关制造有限公司(原常熟开关厂） | A kind of breaker |
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| JP3334520B2 (en) * | 1996-11-25 | 2002-10-15 | 松下電工株式会社 | DC circuit breaker |
| US5866864A (en) * | 1997-07-14 | 1999-02-02 | Eaton Corporation | Electric current switching apparatus with arc spinning extinguisher |
| JP4466237B2 (en) * | 2004-07-01 | 2010-05-26 | 富士電機機器制御株式会社 | Circuit breaker |
| JP4442477B2 (en) * | 2005-03-14 | 2010-03-31 | 富士電機機器制御株式会社 | Arc extinguishing chamber of switch |
| CN1776872A (en) * | 2005-12-09 | 2006-05-24 | 上海电器科学研究所（集团）有限公司 | Arc-striking structure of low-voltage breaker contact system |
| CN101488424B (en) * | 2008-01-14 | 2011-07-13 | 上海电科电器科技有限公司 | Selective protection switch |
| CN101615535B (en) * | 2009-08-06 | 2013-08-28 | 乐清市牵引机电厂 | Permanent magnet opening and closing type DC intelligent circuit breaker |
| CN201804782U (en) * | 2009-12-16 | 2011-04-20 | 天水西星电气有限责任公司 | AC contactor |
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2018
- 2018-06-15 CN CN202110750948.9A patent/CN113593994B/en active Active
- 2018-06-15 CN CN201810626350.7A patent/CN108648938B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1615246A1 (en) * | 2004-07-05 | 2006-01-11 | ABB Schweiz AG | Arc extinguishing device for circuit breaker |
| CN102157313A (en) * | 2011-05-16 | 2011-08-17 | 法泰电器（江苏）股份有限公司 | Arc extinguishing device of circuit breaker |
| CN102945776A (en) * | 2012-12-10 | 2013-02-27 | 江苏辉能电气有限公司 | Contact arc-extinguishing system of moulded case circuit breaker |
| CN205140913U (en) * | 2015-11-27 | 2016-04-06 | 常熟开关制造有限公司(原常熟开关厂） | Current -limiting type low -voltage circuit breaker |
| CN207199555U (en) * | 2017-09-27 | 2018-04-06 | 常熟开关制造有限公司(原常熟开关厂） | A kind of breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113593994A (en) | 2021-11-02 |
| CN108648938A (en) | 2018-10-12 |
| CN113593994B (en) | 2023-05-05 |
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