CN113345742A - Arc extinguishing system of automatic change-over switch - Google Patents
Arc extinguishing system of automatic change-over switch Download PDFInfo
- Publication number
- CN113345742A CN113345742A CN202110562437.4A CN202110562437A CN113345742A CN 113345742 A CN113345742 A CN 113345742A CN 202110562437 A CN202110562437 A CN 202110562437A CN 113345742 A CN113345742 A CN 113345742A
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- CN
- China
- Prior art keywords
- contact
- arc
- arc extinguishing
- moving contact
- fixed contact
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- 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
-
- 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
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses an arc extinguishing system of an automatic transfer switch, which comprises a shell, a static contact and a moving contact, wherein the static contact is positioned below the moving contact, and the moving contact can rotate between a closing position contacted with the static contact and an opening position separated from the static contact; the arc extinguishing system comprises an arc cutting part and an arc extinguishing chamber, the arc cutting part is rotatably arranged in the shell and comprises a driving plate and an arc cutting plate, and when the moving contact rotates from a closed position to an open position, the head part of the moving contact can act on the driving plate to enable the driving plate to drive the arc cutting plate to rotate and extend between the moving contact and the fixed contact; the arc extinguish chamber is positioned at one side of the fixed contact, the top of the fixed contact is fixed with one end of the arc extinguish chamber, and the moving contact is connected with the other end of the arc extinguish chamber through a conducting wire. The arc extinguishing system of the automatic transfer switch can effectively cut off the electric arc generated by the separation of the moving contact and the static contact, thereby improving the breaking capacity of the automatic transfer switch; and moreover, the arc can be quickly introduced into the arc extinguishing chamber to realize arc extinguishing.
Description
Technical Field
The invention relates to an arc extinguishing system of an automatic transfer switch.
Background
In low voltage distribution systems, automatic transfer switching devices have become an indispensable important component. When the power supply fails, one or more load circuits can be automatically switched from a failure power supply to a standby power supply, so that the important load is ensured not to be powered off when working. At present, an arc extinguishing shield is required to be arranged between a moving contact and a static contact of a change-over switch, electric arcs generated when the moving contact is disconnected enter the arc extinguishing shield through the guidance of an arc striking plate, when the electric arcs enter the arc extinguishing shield through the guidance of the arc striking plate, a part of electric arcs between the moving contact and the static contact are burnt, at the moment, the moving contact and the static contact are pulled apart by a certain distance, but the electric arcs are burnt, so that the moving contact and the static contact are in a conducting state, a power supply is not actually cut off, the breaking capacity of the automatic change-over switch is influenced, and the damage force to the moving contact and the static contact is extremely strong.
Disclosure of Invention
The invention aims to provide an arc extinguishing system of an automatic transfer switch, which has a reasonable structure, can drive an arc cutting piece to rotate through the action of a moving contact so as to cut off an electric arc generated by the separation of the moving contact and a static contact, thereby improving the breaking capacity of the automatic transfer switch; and moreover, the arc can be quickly introduced into the arc extinguishing chamber to realize arc extinguishing, and the moving contact and the static contact are prevented from being burnt by the arc, so that the moving contact and the static contact are protected.
In order to achieve the purpose, the technical scheme of the invention is to design an arc extinguishing system of an automatic transfer switch, wherein the automatic transfer switch comprises a shell, a common power supply contact assembly and a standby power supply contact assembly, wherein the common power supply contact assembly and the standby power supply contact assembly are arranged in the shell; the structure of the common power supply contact assembly is the same as that of the standby power supply contact assembly, the common power supply contact assembly and the standby power supply contact assembly respectively comprise a fixed contact, a movable contact and a movable contact driving mechanism, the fixed contact is fixedly arranged and is positioned below the movable contact, and the movable contact driving mechanism is used for driving the movable contact to rotate between a closed position in contact with the fixed contact and an open position separated from the fixed contact;
the arc extinguishing system comprises an arc cutting part and an arc extinguishing chamber, wherein the arc cutting part is used for cutting off an electric arc generated by separation of a moving contact and a static contact, the arc cutting part is rotatably arranged in the shell through a shaft pin and comprises a driving plate and an arc cutting plate integrally connected with the driving plate, the head of the moving contact is positioned between the driving plate and the arc cutting plate, when the moving contact rotates from a closed position to an open position, the head of the moving contact can act on the driving plate, so that the driving plate drives the arc cutting plate to rotate and extend into a space between the moving contact and the static contact, and when the moving contact rotates from the open position to the closed position, the head of the moving contact can act on the arc cutting plate, so that the arc cutting plate rotates and moves out from the space between the moving contact and the static contact;
the arc extinguishing chamber is fixedly arranged inside the shell, the arc extinguishing chamber is located on one side of the fixed contact, an arc inlet and an exhaust port are formed in the top and the bottom of the arc extinguishing chamber respectively, the fixed contact comprises a fixed contact support and a fixed contact, the top of the fixed contact support is fixedly connected with one end of the arc extinguishing chamber in a welding mode, the top of the fixed contact support extends to the arc inlet of the arc extinguishing chamber, the fixed contact is arranged at the top of the fixed contact support, and the moving contact is connected with the other end of the arc extinguishing chamber through a wire.
Preferably, the inside of casing is equipped with the exhaust passage with the gas vent intercommunication of explosion chamber, and is equipped with the exhaust gap with exhaust passage intercommunication on the lateral wall of casing.
Preferably, the driving plate is of a Z-shaped structure, and the arc cutting plate is of an arc-shaped structure.
Preferably, an included angle between the driving plate and the arc cutting plate is an acute angle.
Preferably, the shaft pin is arranged at the joint of the driving plate and the arc cutting plate.
Preferably, the arc cutting piece is an insulating piece.
The invention has the advantages and beneficial effects that: the arc extinguishing system of the automatic change-over switch is reasonable in structure, and can drive the arc cutting piece to rotate through the action of the movable contact so as to cut off an electric arc generated by the separation of the movable contact and the fixed contact, so that the breaking capacity of the automatic change-over switch is improved; and moreover, the arc can be quickly introduced into the arc extinguishing chamber to realize arc extinguishing, and the moving contact and the static contact are prevented from being burnt by the arc, so that the moving contact and the static contact are protected.
When the moving contact rotates from the closed position to the open position, the moving contact is separated from the fixed contact, in the process, the head of the moving contact acts on the driving plate of the arc cutting part, the driving plate drives the arc cutting plate to rotate in the clockwise direction until the arc cutting plate extends between the moving contact and the fixed contact, so that electric arcs generated by separation of the moving contact and the fixed contact are cut off, then the electric arcs are rapidly introduced into the arc extinguishing chamber to be extinguished, and high-temperature gas exhausted from an exhaust port of the arc extinguishing chamber is exhausted to the external environment through the exhaust channel and the exhaust gap.
When the moving contact rotates from the open position to the closed position, the moving contact is in contact with the fixed contact, and in the process, the head of the moving contact acts on the arc cutting plate of the arc cutting piece, so that the arc cutting plate rotates in the counterclockwise direction and moves out from between the moving contact and the fixed contact, and the moving contact and the fixed contact are prevented from being closed.
Drawings
FIG. 1 is a schematic of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The technical scheme of the specific implementation of the invention is as follows:
as shown in fig. 1, an arc extinguishing system of an automatic transfer switch includes a housing 1, and a common power contact assembly and a spare power contact assembly disposed inside the housing 1; the common power supply contact assembly and the standby power supply contact assembly are identical in structure, and comprise a fixed contact, a movable contact 2 and a movable contact driving mechanism, wherein the fixed contact is fixedly arranged and is positioned below the movable contact 2, and the movable contact driving mechanism is used for driving the movable contact 2 to rotate between a closed position in contact with the fixed contact and an open position separated from the fixed contact;
the arc extinguishing system comprises an arc cutting part and an arc extinguishing chamber 3, wherein the arc cutting part is used for cutting off an electric arc generated by separation of a moving contact 2 and a static contact, the arc cutting part is rotatably arranged in a shell 1 through a shaft pin 4, the arc cutting part comprises a drive plate 5 and an arc cutting plate 6 integrally connected with the drive plate 5, the head of the moving contact 2 is positioned between the drive plate 5 and the arc cutting plate 6, when the moving contact 2 rotates from a closed position to an open position, the head of the moving contact 2 can act on the drive plate 5, so that the drive plate 5 drives the arc cutting plate 6 to rotate and extend between the moving contact 2 and the static contact, and when the moving contact 2 rotates from the open position to the closed position, the head of the moving contact 2 can act on the arc cutting plate 6, so that the arc cutting plate 6 rotates and moves out from between the moving contact 2 and the static contact;
the arc extinguishing chamber 3 is fixedly arranged inside the shell 1, the arc extinguishing chamber 3 is located on one side of the fixed contact, the top and the bottom of the arc extinguishing chamber 3 are respectively provided with an arc inlet and an exhaust port, the fixed contact comprises a fixed contact support 7 and a fixed contact, the top of the fixed contact support 7 is fixedly connected with one end of the arc extinguishing chamber 3 in a welding mode, the top of the fixed contact support 7 extends to the arc inlet of the arc extinguishing chamber 3, the fixed contact is arranged on the top of the fixed contact support 7, and the movable contact 2 is connected with the other end of the arc extinguishing chamber 3 through a wire.
An exhaust passage 8 communicated with an exhaust port of the arc extinguish chamber 3 is arranged in the shell 1, and an exhaust gap communicated with the exhaust passage 8 is arranged on the side wall of the shell 1.
The driving plate 5 is of a Z-shaped structure, and the arc cutting plate 6 is of an arc structure.
The included angle between the driving plate 5 and the arc cutting plate 6 is an acute angle.
The shaft pin 4 is provided at the junction of the driving plate 5 and the arc cutting plate 6.
The arc cutting piece is an insulating piece.
The invention has the advantages and beneficial effects that: the arc extinguishing system of the automatic change-over switch is reasonable in structure, and can drive the arc cutting piece to rotate through the action of the movable contact 2 so as to cut off an electric arc generated by the separation of the movable contact 2 and the fixed contact, so that the breaking capacity of the automatic change-over switch is improved; and moreover, the arc can be quickly introduced into the arc extinguish chamber 3 to realize arc extinction, so that the moving contact 2 and the static contact are prevented from being burnt by the arc, and the moving contact 2 and the static contact are protected.
When the moving contact 2 rotates from a closed position to an open position, the moving contact 2 is separated from the static contact, in the process, the head of the moving contact 2 acts on the driving plate 5 of the arc cutting part, so that the driving plate 5 drives the arc cutting plate 6 to rotate clockwise until the arc cutting plate 6 extends between the moving contact 2 and the static contact, thereby cutting off electric arcs generated by separation of the moving contact 2 and the static contact, then the electric arcs are quickly introduced into the arc extinguish chamber 3 to be extinguished, and high-temperature gas exhausted from an exhaust port of the arc extinguish chamber 3 is exhausted to the external environment through the exhaust passage 8 and the exhaust gap.
When the moving contact 2 rotates from the open position to the closed position, the moving contact 2 is in contact with the fixed contact, and in the process, the head of the moving contact 2 acts on the arc cutting plate 6 of the arc cutting member, so that the arc cutting plate 6 rotates anticlockwise and moves out from between the moving contact 2 and the fixed contact, and the moving contact 2 and the fixed contact are prevented from being closed.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. An arc extinguishing system of an automatic transfer switch is characterized in that the automatic transfer switch comprises a shell, a common power supply contact assembly and a standby power supply contact assembly, wherein the common power supply contact assembly and the standby power supply contact assembly are arranged in the shell; the structure of the common power supply contact assembly is the same as that of the standby power supply contact assembly, the common power supply contact assembly and the standby power supply contact assembly respectively comprise a fixed contact, a movable contact and a movable contact driving mechanism, the fixed contact is fixedly arranged and is positioned below the movable contact, and the movable contact driving mechanism is used for driving the movable contact to rotate between a closed position in contact with the fixed contact and an open position separated from the fixed contact;
the arc extinguishing system comprises an arc cutting part and an arc extinguishing chamber, wherein the arc cutting part is used for cutting off an electric arc generated by separation of a moving contact and a static contact, the arc cutting part is rotatably arranged in the shell through a shaft pin and comprises a driving plate and an arc cutting plate integrally connected with the driving plate, the head of the moving contact is positioned between the driving plate and the arc cutting plate, when the moving contact rotates from a closed position to an open position, the head of the moving contact can act on the driving plate, so that the driving plate drives the arc cutting plate to rotate and extend into a space between the moving contact and the static contact, and when the moving contact rotates from the open position to the closed position, the head of the moving contact can act on the arc cutting plate, so that the arc cutting plate rotates and moves out from the space between the moving contact and the static contact;
the arc extinguishing chamber is fixedly arranged inside the shell, the arc extinguishing chamber is located on one side of the fixed contact, an arc inlet and an exhaust port are formed in the top and the bottom of the arc extinguishing chamber respectively, the fixed contact comprises a fixed contact support and a fixed contact, the top of the fixed contact support is fixedly connected with one end of the arc extinguishing chamber in a welding mode, the top of the fixed contact support extends to the arc inlet of the arc extinguishing chamber, the fixed contact is arranged at the top of the fixed contact support, and the moving contact is connected with the other end of the arc extinguishing chamber through a wire.
2. The arc extinguishing system of the automatic transfer switch according to claim 1, wherein the housing is provided at an inside thereof with an exhaust passage communicating with an exhaust port of the arc extinguishing chamber, and a side wall of the housing is provided with an exhaust gap communicating with the exhaust passage.
3. The arc extinguishing system of the automatic transfer switch of claim 2, wherein the driving plate has a Z-shaped configuration and the arc cutting plate has a circular arc configuration.
4. The arc extinguishing system of claim 3, wherein the included angle between the driving plate and the arc cutting plate is an acute angle.
5. The arc extinguishing system of the automatic transfer switch of claim 4, wherein the shaft pin is disposed at a junction of the driving plate and the arc cutting plate.
6. The arc extinguishing system of the automatic transfer switch of claim 5, wherein the arc cutting member is an insulating member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110562437.4A CN113345742A (en) | 2021-05-24 | 2021-05-24 | Arc extinguishing system of automatic change-over switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110562437.4A CN113345742A (en) | 2021-05-24 | 2021-05-24 | Arc extinguishing system of automatic change-over switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113345742A true CN113345742A (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110562437.4A Pending CN113345742A (en) | 2021-05-24 | 2021-05-24 | Arc extinguishing system of automatic change-over switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113345742A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1457065A (en) * | 2003-03-12 | 2003-11-19 | 北京人民电器厂 | Circuit breaker forced extinguisher |
| CN102832062A (en) * | 2012-08-28 | 2012-12-19 | 北京人民电器厂有限公司 | Electrical appliance device with arc separating member |
| CN107359067A (en) * | 2017-08-23 | 2017-11-17 | 河北宝凯电气股份有限公司 | A kind of miniature circuit breaker with stronger arc extinguishing ability |
-
2021
- 2021-05-24 CN CN202110562437.4A patent/CN113345742A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1457065A (en) * | 2003-03-12 | 2003-11-19 | 北京人民电器厂 | Circuit breaker forced extinguisher |
| CN102832062A (en) * | 2012-08-28 | 2012-12-19 | 北京人民电器厂有限公司 | Electrical appliance device with arc separating member |
| CN107359067A (en) * | 2017-08-23 | 2017-11-17 | 河北宝凯电气股份有限公司 | A kind of miniature circuit breaker with stronger arc extinguishing ability |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210903 |