CN113593994B - Conductive loop system with excellent magnetic blowing effect - Google Patents
Conductive loop system with excellent magnetic blowing effect Download PDFInfo
- Publication number
- CN113593994B CN113593994B CN202110750948.9A CN202110750948A CN113593994B CN 113593994 B CN113593994 B CN 113593994B CN 202110750948 A CN202110750948 A CN 202110750948A CN 113593994 B CN113593994 B CN 113593994B
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- moving contact
- arc
- contact
- loop system
- stationary
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- 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
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
The application is based on the application number 201810626350.7, the application date is 2018, and the application date is 15, and is a divisional application of the invention of Shanghai electric appliance science research institute (group) limited company, shanghai electric appliance science research institute, and the invention name is a conductive loop system with excellent magnetic blowing effect.
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 (10)
1. The utility model provides a conductive loop system with good magnetic blowing effect, its characterized in that includes stationary bar, moving contact, stationary contact striking plate, moving contact striking plate and explosion chamber, the one end of moving contact links to each other with the pivot, the moving contact pass through the flexible coupling with the moving contact striking plate links to each other, the other end of moving contact is equipped with the moving contact, the moving contact is equipped with circular arc part and regard as the moving contact arc angle, the moving contact is at least partially located the scope at which the arc extinguishing plate is located in the explosion chamber, the orbit of tip is located in the explosion chamber at the time of the moving contact swing the scope at which the arc extinguishing plate is located and be close to the arc extinguishing plate, the tip of moving contact equipotential striking plate extends to the gas outlet, the moving contact with moving contact striking plate equipotential connection, the stationary contact striking plate is located the stationary bar is last, the stationary contact is equipped with the stationary contact on the stationary contact, the stationary contact and the moving contact striking plate extends to the arc chamber when the moving contact and the arc extinguishing plate extends to the stationary contact, the stationary contact and the arc striking plate extends to the arc chamber.
2. The conductive loop system of claim 1 wherein the double-sided arc runner angle formed by the stationary contact arc runner and the moving contact arc runner is approximately 180 °.
3. The conductive loop system of claim 1, further comprising a moving contact positioned below the stationary row, the arc chute positioned to the right of the stationary row and the moving contact.
4. A conductive loop system according to claim 3 and wherein said moving contact is connected at one end to said shaft about which said moving contact oscillates between said stationary contact and said moving contact arcing member.
5. The conductive loop system of claim 4, wherein after the moving contact swings downward into position, the moving contact contacts or is close to the moving contact striking plate, and the arc jumps from the moving contact arc angle to the moving contact striking plate.
6. The conductive loop system of claim 1, further comprising a release fixedly connected to the stationary bar.
7. The electrical conduction loop system of claim 6, wherein said stationary contact arcing member extends said electrical arc in a direction toward said trip unit and said moving contact arcing member extends said electrical arc in a direction away from said trip unit.
8. The conductive loop system of claim 1, wherein the top of the arc extinguishing chamber is communicated with an upper air outlet, the bottom of the arc extinguishing chamber is communicated with a lower air outlet, and the fixed contact arc striking piece and the moving contact arc striking piece transfer arc roots on two sides of the arc to the corresponding upper air outlet and lower air outlet.
9. The conductive loop system of claim 1 wherein a magnetic blow-off effect in the vicinity of the stationary contact strike plate is directed toward the lower air outlet.
10. The conductive loop system of claim 1, wherein a magnetic blow effect of the moving contact strike blade position is directed toward the upper air outlet.
Priority Applications (1)
| 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 |
Applications Claiming Priority (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 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810626350.7A Division CN108648938B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113593994A CN113593994A (en) | 2021-11-02 |
| CN113593994B true CN113593994B (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810626350.7A Active CN108648938B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
| CN202110750948.9A Active CN113593994B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810626350.7A Active CN108648938B (en) | 2018-06-15 | 2018-06-15 | Conductive loop system with excellent magnetic blowing effect |
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| CN (2) | CN108648938B (en) |
Citations (4)
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| CN102354636A (en) * | 2011-07-28 | 2012-02-15 | 法泰电器（江苏）股份有限公司 | Arc-extinguishing device of circuit breaker |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108648938B (en) | 2023-12-05 |
| CN108648938A (en) | 2018-10-12 |
| CN113593994A (en) | 2021-11-02 |
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