CN114203492A - Plastic shell type circuit breaker contact system with arc contacts - Google Patents
Plastic shell type circuit breaker contact system with arc contacts Download PDFInfo
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- CN114203492A CN114203492A CN202111586288.1A CN202111586288A CN114203492A CN 114203492 A CN114203492 A CN 114203492A CN 202111586288 A CN202111586288 A CN 202111586288A CN 114203492 A CN114203492 A CN 114203492A
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- contact
- arc
- circuit breaker
- conductor
- static
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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
- H01H73/04—Contacts
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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
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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
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
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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
- H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
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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
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
Abstract
The invention relates to a plastic shell type circuit breaker contact system with an arc contact, which comprises a shell (10), wherein a rotating shaft component, a static contact conductor component and an arc extinguish chamber (9) are arranged in the shell, the rotating shaft component is welded on a dynamic contact conductor (7) through a dynamic contact (6), and the dynamic contact conductor (7) is fixed in a rotating shaft (8); the static contact conductor component comprises a static contact (2), an arc contact (3), a pressure spring (4) and a countersunk screw (5), and the static contact (2) is welded on the static contact conductor (1). The circuit breaker contact system of the invention has the advantages that the arc contact (3) is arranged, so that the arc contact of the contact system is switched on and then switched off, the main contact is effectively protected, the circuit breaker can stably and reliably operate for a long time, the temperature rise of the circuit breaker does not exceed the numerical value specified by the national standard, and the circuit breaker contact system has higher electric service life times. The arc contact does not need to be provided with a rotating shaft independently, keeps in contact with the static contact conductor under the action of the pressure spring, and rotates by taking the contact line of the arc contact and the static contact conductor as an axis.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a plastic shell type circuit breaker contact system with arc contacts.
Background
The contact system is a core component of the circuit breaker, and in order to ensure that the circuit breaker stably and reliably operates for a long time, the temperature rise of the contact system is not allowed to exceed the value specified by the national standard. The contact material loss of the breaker is large in the breaking process, and the contact part is easy to melt and weld in the closing process. After the breaker is subjected to a plurality of short-circuit breaking tests or electric service life tests, silver points on a moving contact of the breaker are seriously burnt and eroded by electric arcs, and the after-test verification and the electric service life operation times of the short-circuit breaking tests are influenced. To improve this problem, there are generally three solutions. Firstly, starting from the material of the silver dots, the silver dots are more wear-resistant and ablation-resistant, and the measure inevitably brings about great increase of the cost; secondly, the opening distance between the moving contact and the fixed contact is increased, but the improvement on the operation times of the electric service life is limited, and the compact molded case circuit breaker product is very difficult to implement; and thirdly, an arc contact is arranged, and a part of contact blades of the contact system are used as the arc contact to be switched on and then switched off, so that the main contact is effectively protected.
The contact system with the arc contact is mainly applied to the universal circuit breaker at present, the arc contact and a main contact are arranged on a moving contact conductor in some schemes, the moving contact conductor is assembled on a contact support through a rotating shaft and is pressed on the contact support by a contact spring, the rotating shaft of the moving contact conductor is not overlapped with the rotating shaft of the contact support, the arc contact is ensured to be firstly overlapped and then separated, and the contact spring needs a larger stroke. The contact system requires a large size to arrange the structure of the solution described above. In some schemes, the arc contact is connected with the moving contact conductor through flexible connection, the number of parts is large, the structure is complex, and the size is larger. The rated current of the molded case circuit breaker is small, the overall dimension is generally much smaller than that of a conventional circuit breaker, the moving contact and the rotating shaft of the contact support are coincident, and the technical scheme of the conventional circuit breaker cannot be directly applied to the molded case circuit breaker.
For example, chinese patent publication No. CN 107799368B discloses a contact structure of a molded case circuit breaker, which includes a fixed contact, one end of the fixed contact is a U-shaped bent end having a U-shaped cavity, and a magnet assembly disposed in the U-shaped cavity, a contact bottom hole is disposed on a bottom wall of the U-shaped bent end, a magnet bottom hole corresponding to the contact bottom hole is disposed at a bottom of the magnet assembly, and the contact structure of the molded case circuit breaker further includes a positioning column for being inserted into the contact bottom hole and the magnet bottom hole to position the magnet assembly. During assembly, the magnet assembly is installed in the U-shaped concave cavity of the U-shaped bent end, then the static contact is installed on the positioning column, and the positioning column penetrates through the bottom hole of the contact and is connected in the bottom hole of the magnet; when the magnet assembly is disassembled, the positioning column is disassembled, and the magnet assembly is horizontally moved out of the U-shaped concave cavity. The iron core and the iron core shell are arranged in the static contact through the positioning column, the structure is complex, and the overall dimension is large.
Disclosure of Invention
Based on the problems, the invention provides a contact system of a plastic shell type circuit breaker with arc contacts, which is characterized in that the arc contacts of the contact system are firstly switched on and then switched off by arranging the arc contacts, so that the main contacts are effectively protected, the circuit breaker is ensured to stably and reliably operate for a long time, and the temperature rise of the circuit breaker does not exceed the numerical value specified by the national standard; in addition, the position of the arc contact is closer to the arc extinguish chamber than the position of the static contact, so that the arc can enter the arc extinguish chamber earlier when the breaker breaks the short-circuit current, the arc dead time is reduced, the arc voltage rise rate is increased, the current limiting effect of a contact system is enhanced, and the post-test verification of a short-circuit breaking test is facilitated.
The invention relates to a plastic shell type circuit breaker contact system with an arc contact, which comprises a shell, wherein a rotating shaft component, a static contact conductor component and an arc extinguish chamber are arranged in the shell, the rotating shaft component is welded on a dynamic contact conductor by a dynamic contact, and the dynamic contact conductor is fixed in a rotating shaft; the static contact conductor component comprises a static contact, an arc contact, a pressure spring and a countersunk screw, and the static contact is welded on the static contact conductor. The contact system of the circuit breaker is provided with the arc contact, so that the arc contact of the contact system is switched on and then switched off, the main contact is effectively protected, the circuit breaker is ensured to stably and reliably run for a long time, and the temperature rise of the circuit breaker does not exceed the numerical value specified by the national standard. Compared with the structural scheme of the non-arc contact, the contact system of the circuit breaker has higher electric service life times. And the position of the arc contact is closer to the arc extinguish chamber than the static contact, so that the arc can enter the arc extinguish chamber earlier when the breaker breaks the short-circuit current, the arc dead time is reduced, the arc voltage rise rate is increased, the current limiting effect of a contact system is enhanced, and the post-test verification of a short-circuit breaking test is facilitated.
Moving contact conductor and contact support's rotation axis is not coincident among the conventional circuit breaker arc contact system scheme, in order to guarantee that the arc contact closes earlier afterwards to divide, the contact spring needs longer stroke, needs great size just can arrange whole contact system. The circuit breaker contact system of the invention arranges the arc contact in the static contact conductor, only needs one pressure spring and countersunk head screw, realizes the relative rotation of the arc contact and the static contact conductor, and ensures that the arc contact and the static contact conductor are always contacted.
In addition, the arc contact does not need to be provided with a rotating shaft independently, keeps in contact with the static contact conductor under the action of the pressure spring, and rotates by taking the contact line of the arc contact and the static contact conductor as an axis; the arc contact and the moving contact conductor have small size and compact structure. Compared with the traditional scheme, the contact system has the advantages of small number of parts, simplicity, reliability, reduction in the use of noble metals and reduction in cost.
In the process of closing and opening the circuit breaker, the contact system with the structure ensures that electric arcs are always generated between the arc contact and the moving contact conductor, and the moving and static main contacts are effectively protected.
The circuit breaker contact system of the invention is applied to the example of the double-breakpoint molded case circuit breaker, when the circuit breaker is applied to the single-breakpoint molded case circuit breaker, the independent shell is replaced by the circuit breaker shell, and meanwhile, the circuit breaker contact system can be implemented only by slightly changing the sizes and the positions of the moving contact conductor and the rotating shaft.
The working process of the plastic shell type circuit breaker contact system with the arc contact comprises the following steps:
when the circuit breaker is switched on, the rotating shaft assembly rotates anticlockwise to the static contact assembly from approaching to closing, and the process of switching on the current loop is completed. In the closing process, the gap between the moving contact conductor and the arc contact is small enough, air between the moving contact conductor and the arc contact is broken down to generate electric arcs, and the electric arcs are generated at the top of the arc contact and the position where the moving contact conductor and the arc contact are about to contact. The rotating shaft assembly continues to rotate anticlockwise, the moving contact conductor is in contact with the arc contact, and the electric arc is extinguished. The arc contact is stressed and rotates anticlockwise by taking a contact line of the arc contact and the static contact conductor as an axis, and the number of turns of the part of the pressure spring which is not in contact with the screw is stressed to be locally twisted, so that the contact and the contact pressure of the arc contact and the static contact conductor are ensured. The rotating shaft assembly continues to rotate until the moving contact and the fixed contact are contacted and the overtravel is completed, so that the circuit breaker is ensured to continuously and normally pass through load current.
When the breaker is opened, the rotating shaft assembly rotates clockwise to leave the fixed contact assembly from closing to opening, and the process of circuit opening is completed. In the disconnection process, the moving contact and the static contact are firstly separated from contact, at the moment, the arc contact rotates clockwise by taking the contact line of the arc contact and the static contact conductor as an axis under the action of a pressure spring force, the partial circle number of the pressure spring which is not in contact with the screw is stressed and locally twisted, the contact and the contact pressure of the arc contact and the static contact conductor are ensured, at the moment, the arc contact and the moving contact conductor are still kept in contact, and no electric arc is generated between the moving contact and the static contact. The rotating shaft assembly continues to rotate clockwise, the arc contact is limited by the static contact conductor to stop rotating clockwise, the arc contact and the moving contact conductor are separated from contact, and electric arcs are generated between the arc contact and the moving contact conductor. The pivot subassembly continues clockwise rotation, and the opening is apart from the increase, and electric arc is elongated, under the effect of the double arc blowing of magnetic field force and gas, gets into the explosion chamber, is cut and is finally extinguished with the cooling. The breaker is guaranteed to break load current or fault current.
Preferably, the arc contact is an S-shaped structural member, the two ends of the arc contact are provided with arc surfaces, the bottom of the arc surface at one end is a horizontal plane, the horizontal plane is provided with a counter bore, and the diameter of the counter bore is larger than or equal to the outer diameter of the pressure spring.
In any of the above schemes, preferably, the arcing contact is pressed against the stationary contact conductor by a pressure spring to form a conductive loop.
In any of the above schemes, preferably, the bent portion at the lower end of the static contact conductor is provided with a countersunk hole, a countersunk screw is installed in the countersunk hole, and the upper end of the countersunk screw is in contact with the inner ring of the pressure spring.
In any of the above schemes, preferably, a gap is left between the top of the countersunk head screw and the arc contact to limit the pressure spring.
In any of the above schemes, preferably, the static contact conductor is a hook-shaped structure with one end bent inward, and the other end is a horizontal structural member.
In any of the above schemes, preferably, one end of the pressure spring abuts against the counter bore of the arc contact, and the other end abuts against the reverse side of the mounting surface of the countersunk head screw of the static contact conductor.
In any of the above schemes, preferably, the arc contact is limited by the stationary contact conductor, the pressure spring and the contact portion thereof, and has a translational degree of freedom along the axial direction of the pressure spring and a rotational degree of freedom using the contact line of the arc contact and the stationary contact conductor as the axis.
In any of the above schemes, preferably, the size of the arcing contact in the horizontal direction is 1.5-2 times the length of the static contact; the size of the arc contact in the vertical direction is 2-2.5 times of the thickness of the static contact conductor; the total length of the assembly body of the pressure spring and the countersunk head screw is 0.8-1.2 times of the vertical dimension of the arc contact. The problem that a conventional circuit breaker arc contact system with a large size is difficult to implement in a molded case circuit breaker is solved.
In any of the above schemes, preferably, the static contact conductor and the moving contact conductor are made of T2 copper material; the static contact is made of AgC material; the arc contact and the moving contact are made of AgWC materials, so that the service life of the contact system is guaranteed.
Drawings
These and other characteristic aspects and advantages of the present invention will now be described, as preferred but not limiting embodiments thereof, will become apparent upon reading the following detailed description with reference to the accompanying drawings, in which:
figure 1 is a schematic structural view of a preferred embodiment of a plastic cased circuit breaker contact system with arcing contacts in accordance with the present invention.
Figure 2 is a schematic view of the structure of the assembly of the arcing contacts of the preferred embodiment of figure 1 of the plastic cased circuit breaker contact system with arcing contacts in accordance with the present invention.
Figure 3 is a schematic view of the structure of the arcing contact of the preferred embodiment of figure 1 of the plastic cased circuit breaker contact system with arcing contacts in accordance with the present invention.
Detailed Description
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
Referring now to the drawings, figure 1 depicts a schematic diagram of the structure of a plastic case circuit breaker contact system with arcing contacts of the present invention. A plastic shell type circuit breaker contact system with an arc contact comprises a shell 10, wherein a rotating shaft component, a static contact conductor component and an arc extinguish chamber 9 are arranged in the shell, the rotating shaft component is welded on a dynamic contact conductor 7 through a dynamic contact 6, and the dynamic contact conductor 7 is fixed in a rotating shaft 8; the static contact conductor component comprises a static contact 2, an arc contact 3, a pressure spring 4 and a countersunk screw 5, and the static contact 2 is welded on the static contact conductor 1.
It should be noted that fig. 1 is an example of the application of the contact system to a double-breakpoint molded case circuit breaker, and when the contact system is applied to a single-breakpoint molded case circuit breaker, the independent housing 10 is replaced by a circuit breaker housing, and meanwhile, the size and the position of the movable contact conductor 7 and the rotating shaft 8 are only slightly changed to implement the application.
Referring to fig. 3, a schematic view of the arc contact of the preferred embodiment of fig. 1 of the plastic-cased circuit breaker contact system with arc contacts according to the present invention
In this embodiment, the arc contact 3 is an S-shaped structural member, and both ends of the S-shaped structural member are provided with arc surfaces, wherein the bottom of the arc surface at one end is a horizontal plane, and the horizontal plane is provided with a counter bore 31, and the diameter of the counter bore is greater than or equal to the outer diameter of the pressure spring 4.
Referring next to fig. 2, a schematic view of the assembly of the arc contacts of the preferred embodiment of fig. 1 of the plastic cased circuit breaker contact system with arc contacts in accordance with the present invention is shown.
In this embodiment, the arcing contact 3 is pressed against the stationary contact conductor 1 by the compression spring 4 to form a conductive loop.
In this embodiment, a countersunk hole is formed at the bent portion of the lower end of the static contact conductor 1, a countersunk screw 5 is installed in the countersunk hole, and the upper end of the countersunk screw is in contact with the inner ring of the pressure spring 4.
In this embodiment, a gap is left between the top of the countersunk head screw 5 and the arc contact 3, so as to limit the pressure spring 4.
In this embodiment, the static contact conductor 1 is a hook-shaped structure with one end bent inward, and the other end is a horizontal structural member.
In this embodiment, one end of the pressure spring 4 abuts against the counterbore 31 of the arcing contact 3, and the other end abuts against the counterbore of the static contact conductor 1.
In this embodiment, the arc contact 3 is limited by the fixed contact conductor 1, the compression spring 4 and the contact portion thereof, and has a translational degree of freedom along the axial direction of the compression spring 4 and a rotational degree of freedom using the contact line between the arc contact 3 and the fixed contact conductor 1 as the axis.
In the embodiment, the size of the arcing contact 3 in the horizontal direction is 1.5-2 times the length of the static contact 2; the size of the arc contact 3 in the vertical direction is 2-2.5 times of the thickness of the static contact conductor 1; the total length of the assembly of the pressure spring 4 and the countersunk head screw 5 is 0.8-1.2 times of the vertical dimension of the arc contact 3. The problem that a conventional circuit breaker arc contact system with a large size is difficult to implement in a molded case circuit breaker is solved.
In this embodiment, the static contact conductor 1 and the moving contact conductor 6 are made of T2 copper materials; the static contact 2 is made of AgC material; the arc contact 3 and the moving contact 6 are made of AgWC materials, so that the service life of the contact system is ensured.
The working process of the plastic shell type circuit breaker contact system with the arc contact comprises the following steps:
when the circuit breaker is switched on, the rotating shaft assembly rotates anticlockwise to the fixed contact assembly in the figure 1, and the process of switching on the current loop is completed from approaching to closing. During closing, the gap between the movable contact conductor 7 and the arcing contact 3 is small enough, and air between the two is broken down to generate an arc, which is generated at the top of the arcing contact 3 and at the position where the movable contact conductor 7 and the arcing contact are about to contact. The rotating shaft assembly continues to rotate anticlockwise, the moving contact conductor 7 is in contact with the arc contact 3, and the electric arc is extinguished. The arc contact 3 is stressed to rotate anticlockwise by taking a contact line of the arc contact 3 and the static contact conductor 1 as an axis, and the number of turns of the part of the pressure spring 4 which is not in contact with the screw 5 is stressed to be locally twisted, so that the contact and the contact pressure of the arc contact 3 and the static contact conductor 1 are ensured. At this moment, the rotating shaft assembly continues to rotate until the moving contact 6 and the static contact 2 are contacted and go beyond the range, and the breaker is ensured to continuously and normally pass through load current.
When the circuit breaker is opened, the rotating shaft assembly rotates clockwise in the figure 1 to leave the fixed contact assembly from closing to opening, and the process of circuit opening is completed. In the disconnection process, the movable contact 6 and the static contact 2 are firstly separated from contact, at the moment, the arc contact 3 rotates clockwise by taking the contact line of the arc contact 3 and the static contact conductor 1 as an axis under the action of the pressure spring 4, the partial circle number of the pressure spring 4 which is not in contact with the screw 5 is stressed and locally twisted, the contact and the contact pressure of the arc contact 3 and the static contact conductor 1 are ensured, at the moment, the arc contact 3 and the movable contact conductor 7 are still kept in contact, and no electric arc is generated between the movable contact 6 and the static contact 2. The rotating shaft assembly continues to rotate clockwise, the arc contact 3 is limited by the static contact conductor 1 to stop rotating clockwise, the arc contact 3 and the moving contact conductor 7 are separated from contact, and an electric arc is generated between the arc contact 3 and the moving contact conductor 7. The pivot subassembly continues clockwise rotation, and the opening is apart from the increase, and electric arc is elongated, under the effect of the double arc blowing of magnetic field force and gas, gets into the explosion chamber, is cut and is finally extinguished with the cooling. The breaker is guaranteed to break load current or fault current.
The circuit breaker contact system of the invention ensures that the arc contact of the contact system is switched on and then switched off by arranging the arc contact 3, thereby effectively protecting the main contact, ensuring that the circuit breaker stably and reliably operates for a long time and ensuring that the temperature rise of the circuit breaker does not exceed the numerical value specified by the national standard. Compared with the structural scheme of the non-arc contact, the contact system of the circuit breaker has higher electric service life times. And the position of the arc contact 3 is closer to the arc extinguish chamber 9 than the position of the static contact 2, so that the arc can enter the arc extinguish chamber 9 earlier when the breaker breaks the short-circuit current, the arc dead time is reduced, the arc voltage rise rate is increased, the current limiting effect of a contact system is enhanced, and the post-test verification of a short-circuit breaking test is facilitated.
Moving contact conductor and contact support's rotation axis is not coincident among the conventional circuit breaker arc contact system scheme, in order to guarantee that the arc contact closes earlier afterwards to divide, the contact spring needs longer stroke, needs great size just can arrange whole contact system. According to the circuit breaker contact system, the arc contact 3 is arranged in the static contact conductor 1, only one pressure spring 4 and the countersunk screw 5 are needed, and the arc contact 3 and the static contact conductor 1 are ensured to be always in contact while the arc contact 3 and the static contact conductor 1 rotate relatively.
In addition, the arc contact 3 does not need to be provided with a rotating shaft independently, the arc contact 3 keeps contact with the static contact conductor 1 under the action of the pressure spring 4, and the arc contact rotates by taking the contact line of the arc contact and the static contact conductor as an axis; the arc contact 3 and the moving contact conductor 7 have small size and compact structure. Compared with the traditional scheme, the contact system has the advantages of small number of parts, simplicity, reliability, reduction in the use of noble metals and reduction in cost.
In the process of closing and opening the circuit breaker, the contact system with the structure ensures that electric arcs are always generated between the arc contact 3 and the moving contact conductor 7, and the moving and static main contacts are effectively protected.
Although the present invention has been disclosed in detail with reference to the accompanying drawings, it is to be understood that such description is merely illustrative and not restrictive of the application of the present invention. The scope of the present invention is defined by the appended claims, and may include various modifications, alterations, and equivalents made thereto without departing from the scope and spirit of the invention.
Claims (10)
1. The utility model provides a plastic casing formula circuit breaker contact system with arc contact, its includes casing (10), is equipped with pivot subassembly, static contact conductor subassembly and explosion chamber (9) in this casing, its characterized in that: the rotating shaft component is formed by welding a moving contact (6) on a moving contact conductor (7), and the moving contact conductor (7) is fixed in a rotating shaft (8); the static contact conductor component comprises a static contact (2), an arc contact (3), a pressure spring (4) and a countersunk screw (5), and the static contact (2) is welded on the static contact conductor (1).
2. The plastic cased circuit breaker contact system having arcing contacts of claim 1, wherein: the arc contact (3) is an S-shaped structural member, two ends of the arc contact are respectively provided with an arc surface, the bottom of the arc surface at one end is a horizontal plane, a counter bore (31) is formed in the horizontal plane, and the diameter of the counter bore is larger than or equal to the outer diameter of the pressure spring (4).
3. The plastic cased circuit breaker contact system with arcing contacts of claim 1 or 2, wherein: the arc contact (3) is pressed on the static contact conductor (1) through a pressure spring (4).
4. The plastic cased circuit breaker contact system having arcing contacts of claim 1, wherein: the lower end of the static contact conductor (1) is provided with a countersunk hole at the bending part, a countersunk screw (5) is arranged in the countersunk hole, and the upper end of the countersunk screw is contacted with the inner ring of the pressure spring (4).
5. The plastic cased circuit breaker contact system having arcing contacts of claim 4, wherein: a gap is reserved between the top of the countersunk head screw (5) and the arc contact (3).
6. The plastic case circuit breaker contact system with arcing contacts of any of claims 1, 4 or 5, wherein: the static contact conductor (1) is a hook-shaped structure with one end bent inwards and the other end is a horizontal structure.
7. The plastic cased circuit breaker contact system with arcing contacts of claim 1 or 2, wherein: one end of the pressure spring (4) is abutted against the counter bore (31) of the arc contact (3), and the other end is abutted against the reverse side of the mounting surface of the countersunk head screw (5) of the static contact conductor (1).
8. The plastic cased circuit breaker contact system with arcing contacts of claim 1 or 2, wherein: the arc contact (3) is limited by the static contact conductor (1), the pressure spring (4) and the contact part thereof, and has translational freedom along the axial direction of the pressure spring (4) and rotational freedom with the contact line of the arc contact (3) and the static contact conductor (1) as the axial line.
9. The plastic cased circuit breaker contact system with arcing contacts of claim 1 or 2, wherein: the size of the arc contact (3) in the horizontal direction is 1.5-2 times of the length of the static contact (2); the size of the arc contact (3) in the vertical direction is 2-2.5 times of the thickness of the static contact conductor (1); the total length of the assembly body of the pressure spring (4) and the countersunk head screw (5) is 0.8-1.2 times of the vertical dimension of the arc contact (3).
10. The plastic cased circuit breaker contact system having arcing contacts of claim 1, wherein: the static contact conductor (1) and the moving contact conductor (6) are made of T2 copper materials; the static contact (2) is made of AgC material; the arc contact (3) and the moving contact (6) are made of AgWC materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111586288.1A CN114203492A (en) | 2021-12-23 | 2021-12-23 | Plastic shell type circuit breaker contact system with arc contacts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111586288.1A CN114203492A (en) | 2021-12-23 | 2021-12-23 | Plastic shell type circuit breaker contact system with arc contacts |
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| CN114203492A true CN114203492A (en) | 2022-03-18 |
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| CN202111586288.1A Withdrawn CN114203492A (en) | 2021-12-23 | 2021-12-23 | Plastic shell type circuit breaker contact system with arc contacts |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304149A (en) * | 2000-01-07 | 2001-07-18 | 施耐德电器工业公司 | Electric breaker electrode arranged with arc chutes with dieelectric shield |
| CN2845155Y (en) * | 2005-12-07 | 2006-12-06 | 上海电器科学研究所（集团）有限公司 | Arc extinction unit of contract |
| CN102623199A (en) * | 2012-04-19 | 2012-08-01 | 上海诺雅克电气有限公司 | Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay |
| CN103560037A (en) * | 2013-10-21 | 2014-02-05 | 武汉长海电气科技开发有限公司 | Load disconnecting switch |
| CN104064398A (en) * | 2014-07-01 | 2014-09-24 | 王永法 | Contact of vacuum arc extinguishing chamber |
| CN204130366U (en) * | 2014-10-29 | 2015-01-28 | 贵州长征开关制造有限公司 | A kind of moving contact component of novel duplicate-power automatic transfer switching electric appliance |
| CN204835331U (en) * | 2015-06-12 | 2015-12-02 | 江苏其厚智能电气设备有限公司 | Integration intelligence combination transformer substation |
| CN108133868A (en) * | 2017-12-29 | 2018-06-08 | 武汉长海电气科技开发有限公司 | A kind of D.C. contactor contact system |
| CN113539755A (en) * | 2020-04-17 | 2021-10-22 | 北京人民电器厂有限公司 | Circuit breaker |
-
2021
- 2021-12-23 CN CN202111586288.1A patent/CN114203492A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304149A (en) * | 2000-01-07 | 2001-07-18 | 施耐德电器工业公司 | Electric breaker electrode arranged with arc chutes with dieelectric shield |
| CN2845155Y (en) * | 2005-12-07 | 2006-12-06 | 上海电器科学研究所（集团）有限公司 | Arc extinction unit of contract |
| CN102623199A (en) * | 2012-04-19 | 2012-08-01 | 上海诺雅克电气有限公司 | Electric conduction system of switch device, low-voltage plastic-shell circuit breaker and thermal overload relay |
| CN103560037A (en) * | 2013-10-21 | 2014-02-05 | 武汉长海电气科技开发有限公司 | Load disconnecting switch |
| CN104064398A (en) * | 2014-07-01 | 2014-09-24 | 王永法 | Contact of vacuum arc extinguishing chamber |
| CN204130366U (en) * | 2014-10-29 | 2015-01-28 | 贵州长征开关制造有限公司 | A kind of moving contact component of novel duplicate-power automatic transfer switching electric appliance |
| CN204835331U (en) * | 2015-06-12 | 2015-12-02 | 江苏其厚智能电气设备有限公司 | Integration intelligence combination transformer substation |
| CN108133868A (en) * | 2017-12-29 | 2018-06-08 | 武汉长海电气科技开发有限公司 | A kind of D.C. contactor contact system |
| CN113539755A (en) * | 2020-04-17 | 2021-10-22 | 北京人民电器厂有限公司 | Circuit breaker |
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Application publication date: 20220318 |