CN112509883A - Plastic case circuit breaker - Google Patents
Plastic case circuit breaker Download PDFInfo
- Publication number
- CN112509883A CN112509883A CN202011476122.XA CN202011476122A CN112509883A CN 112509883 A CN112509883 A CN 112509883A CN 202011476122 A CN202011476122 A CN 202011476122A CN 112509883 A CN112509883 A CN 112509883A
- Authority
- CN
- China
- Prior art keywords
- base
- upper cover
- insulating
- circuit breaker
- trip unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
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Abstract
A molded case circuit breaker belongs to the technical field of low-voltage circuit breakers. Including base, release and upper cover, upper cover and base cooperation installation, form the cavity that is used for holding the release, still include insulating part, insulating part set up in the cavity, be located one side of release and be located the assembly clearance department that upper cover and base assembly formed, will release and assembly clearance separate. The advantages are that: the interphase insulation and the ground insulation performance of the circuit breaker can be effectively improved, so that the electric interference from adjacent phases and the electric influence on the ground, which are received by the tripper, are reduced, the risk of free gas pollution is reduced to a certain extent, and the reliability and the safety of the circuit breaker in the process of circuit protection are improved.
Description
Technical Field
The invention belongs to the technical field of low-voltage circuit breakers, and relates to a molded case circuit breaker.
Background
The molded case circuit breaker generally comprises a moving contact, a fixed contact, an operating mechanism and a release, wherein the release applied to the molded case circuit breaker has an important function when the function of the circuit breaker is realized, and the operating mechanism is unlocked when the circuit is abnormal such as short circuit and overload, so that the circuit breaker completes the whole protection process. However, the trip device structure of the conventional molded case circuit breaker is easily affected by the adjacent phases and the electric influence between the phases and the ground, and is also easily polluted by the free gas, so that the circuit breaker cannot provide absolute reliability and safety during circuit protection.
In view of the above-mentioned prior art, the applicant has made an advantageous design, and the technical solutions described below have been made in this context.
Disclosure of Invention
The invention aims to provide a molded case circuit breaker, which can effectively improve the insulation performance between phases and the insulation performance to the ground of the circuit breaker, thereby reducing the electrical interference from adjacent phases and the electrical influence to the ground on a release, and reducing the risk of pollution of the release by free gas.
The invention aims to achieve the aim that the molded case circuit breaker comprises a base, a release and an upper cover, wherein the upper cover and the base are installed in a matched mode to form a cavity for containing the release, and the molded case circuit breaker is characterized in that: the insulating component is arranged in the cavity, is positioned on one side of the tripper and is positioned at an assembly gap formed by assembling the upper cover and the base, and separates the tripper from the assembly gap.
In a specific embodiment of the invention, after the upper cover and the base are assembled in place, an assembly gap is formed between the spaced ribs of the base and the upper cover spaced ribs of the upper cover, the insulating part located on one side of the release close to the spaced ribs is arranged at the assembly gap, the upper edge of the insulating part is higher than the assembly gap, and the lower edge of the insulating part is lower than the assembly gap.
In another specific embodiment of the present invention, after the upper cover and the base are assembled in place, an assembly gap is formed between the base side plate of the base and the upper cover side plate of the upper cover, the insulating member located on one side of the trip unit close to the base side plate is disposed at the assembly gap, and the upper edge of the insulating member is higher than the assembly gap while the lower edge is lower than the assembly gap.
In another specific embodiment of the present invention, the side edges of both sides of the insulating member have bending structures extending in the height direction, and the bending structures are bent toward the side close to the trip unit.
In another specific embodiment of the invention, the insulating component is clamped between the release and the spaced ribs, and after the upper cover and the base are assembled in place, the bottom of the insulating component is positioned on the mounting plane of the release, and the top of the insulating component is positioned on the top surface of the upper cover.
In a further specific embodiment of the present invention, the insulating member is clamped between the trip unit and the side plate of the base, and after the upper cover and the base are assembled in place, the bottom of the insulating member is located on the installation plane of the trip unit, and the top of the insulating member is located on the top surface of the upper cover.
In a further specific embodiment of the present invention, the insulating member includes a first insulating sheet and a second insulating sheet, the first insulating sheet is located on a side of the trip unit close to the spaced ribs between the adjacent phases of the base, the second insulating sheet is located on a side of the trip unit close to the base side plate of the base, the first insulating sheet has a first bending structure extending in the height direction on both side edges, the second insulating sheet has a second bending structure extending in the height direction on both side edges, and the first bending structure and the second bending structure are respectively bent toward a side close to the trip unit.
In a more specific embodiment of the present invention, a drawbar is disposed in the cavity of the base, and the first insulating plate and the second insulating plate are disposed at sides close to the drawbar with an insulating connecting plate for connecting the first insulating plate and the second insulating plate.
In yet another specific embodiment of the present invention, a boss is further disposed in the cavity of the base, the trip device includes a conductor, a bimetallic strip, a bracket, an armature and a spring, the conductor is supported on the bracket, the bimetallic strip is connected to the conductor, one end of the spring is connected to the bracket, the other end of the spring is connected to the upper end of the armature, and the armature is limited on the boss at the installation position by the action of the spring; the insulating connecting plate set up in the middle part of first insulating piece and second insulating piece, be located the space of insulating connecting plate upper portion and lower part between first insulating piece and the second insulating piece, form the fretwork cavity body that does not hinder armature action.
In a further specific embodiment of the present invention, the insulating member is an insulating tape attached to an assembly gap formed by the assembly of the upper cover and the base.
Due to the adoption of the structure, compared with the prior art, the invention has the beneficial effects that: the protection tripper can effectively improve the interphase insulation and the insulating property to ground of the circuit breaker, reduce the electrical influence that the tripper receives from adjacent phase or to ground, and can reduce the risk that the tripper receives free gas pollution to a certain extent, thereby improving the reliability and the safety of the circuit breaker when the circuit is protected.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the assembly of the upper cover and the base according to the present invention.
Fig. 3 is a schematic view of the internal structure of the upper cover according to the present invention.
Fig. 4 is a schematic structural view of an insulating member according to the present invention.
Fig. 5 is a schematic structural diagram of the trip unit according to the present invention.
Fig. 6 is a top view of fig. 1.
In the figure: 1. the structure comprises a base, 11 cavities, 12 bosses, 13 spaced ribs and 14 base side plates; 2. a release, 21 conductors, 22 bimetallic strips, 23 brackets, 24 armatures, 25 springs; 3. the insulation device comprises an insulation part, 31, a first insulation sheet, 311, a first bending structure, 32, a second insulation sheet, 321, a second bending structure, 33, an insulation connecting plate, 34, a hollow cavity body and 4, a traction rod; 5. the upper cover comprises an upper cover, 51 upper cover partition ribs, 52 upper cover side plates and 53 upper cover top surfaces.
Detailed Description
The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes in form and not essential to the inventive concept should be regarded as the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention relates to a molded case circuit breaker, which includes a base 1, an upper cover 5, and an operating mechanism, a contact device (not shown in the figure) and a release 2, which are disposed in the base 1 and the upper cover 5, wherein the contact device is used for breaking and connecting a line current, the operating mechanism is used for driving the contact device to operate, and the release 2 is used for monitoring the line current and operates to actuate the operating mechanism when the line current is abnormal. The upper cover side plate 52 and the upper cover spacer 51 of the upper cover 5 are respectively installed with the base side plate 14 and the spaced rib 13 of the base 1 in a matching way to form a cavity 11 for accommodating the release 2. The circuit breaker further comprises an insulating component 3, wherein the insulating component 3 is arranged in the cavity 11, is positioned on one side of the release 2 close to the side plate 14 of the base and/or one side of the adjacent alternate ribs 13, and is positioned at an assembly gap formed by assembling the upper cover 5 and the base 1. That is, the insulating member 3 may be disposed only on the side close to the side plate 14, or only on the side close to the spaced ribs 13, and in the present embodiment, the technical description will be given by taking an example in which the insulating member 3 is disposed both on the side close to the base side plate 14 and on the side close to the adjacent spaced ribs 13.
The molded case circuit breaker in this embodiment is a two-pole circuit breaker, and has two cavities 11, and each cavity 11 is provided with one release 2. The trip unit 2 in this embodiment is a magnetic trip unit, but may be a thermal trip unit or a thermal magnetic trip unit in other embodiments.
Specifically, after the upper cover 5 and the base 1 are assembled in place, an assembly gap is formed between the spaced ribs 13 in the base 1 and the upper cover spaced ribs 51, the insulating part 3 located on one side of the release 2 close to the spaced ribs 13 is arranged at the assembly gap, the upper edge of the insulating part 3 is higher than the assembly gap, and the lower edge of the insulating part 3 is lower than the assembly gap; in addition, a fitting gap is formed between the base side plate 14 of the base 1 and the upper cover side plate 52, the insulating member 3 on the side of the trip unit 2 close to the base side plate 14 of the base 1 is disposed at the fitting gap, and the upper edge of the insulating member 3 is higher than the fitting gap and the lower edge is lower than the fitting gap.
Referring to fig. 4 in conjunction with fig. 1 and fig. 2, the insulating member 3 includes a first insulating sheet 31 and a second insulating sheet 32, in this embodiment, the second insulating sheet 32 is located on a side of the trip unit 2 close to the base side plate 14 of the base 1, and the first insulating sheet 31 is located on a side close to the phase spacing rib 13. After the upper cover 5 and the base 1 are assembled in place, the bottom parts of the first insulating sheet 31 and the second insulating sheet 32 are located on the installation plane where the tripper 2 is located, and the top parts of the first insulating sheet 31 and the second insulating sheet 32 are located on the upper cover top surface 53 of the upper cover 5, so that the protection range of the first insulating sheet 31 and the second insulating sheet 32 can be increased, meanwhile, the first insulating sheet 31 and the second insulating sheet 32 can be tightly pressed between the installation plane of the tripper 2 and the upper cover top surface 53, and the installation reliability of the tripper is enhanced. The first insulating sheet 31 has first bending structures 311 extending in the height direction on both side edges, and the second insulating sheet 32 has second bending structures 312 extending in the height direction on both side edges. The first bending structure 311 and the second bending structure 312 are respectively bent toward a side close to the trip unit 2. The first insulating sheet 31 and the second insulating sheet 32 are used for effectively protecting a release, effectively improving the insulation performance between phases and the ground of the circuit breaker, reducing the electrical influence of the release on adjacent phases or the ground, and reducing the risk of free gas pollution to a certain extent, thereby improving the reliability and safety of the circuit breaker in circuit protection. The first and second insulation sheets 31 and 32 may be sheet-shaped insulators made of an insulation material such as nylon or DMC.
Further, referring to fig. 5 and 6 in combination with fig. 4, a boss 12 is disposed in the cavity 11 of the base 1, the trip unit 2 includes a conductor 21, a bimetal 22, a bracket 23, an armature 24 and a spring 25, the conductor 21 is supported on the bracket 23, the bimetal 22 is connected to the conductor 21, one end of the spring 25 is connected to the bracket 23, the other end of the spring is connected to the upper end of the armature 24, and the armature 24 is limited on the boss 12 by the action of the spring 25 at the installation position. The cavity 11 of the base 1 is also provided with a traction rod 4, and the first insulation sheet 31 and the second insulation sheet 32 are provided with an insulation connecting plate 33 at one side close to the traction rod. In the present embodiment, the insulating connection plate 33 is disposed in the middle of the first insulating sheet 31 and the second insulating sheet 32, and a hollow 34 is formed between the first insulating sheet 31 and the second insulating sheet 32 in the upper and lower spaces of the insulating connection plate 33 so as not to hinder the operation of the armature 24. The arrangement of the insulating connecting plate 33 can firstly enhance the overall strength of the insulating component 3, and secondly can block part of reverse gas from the rear of the arc extinguish chamber, so as to prevent the device from being corroded.
In the present embodiment, the first insulating sheet 31 is integrally provided with the second insulating sheet 32 and the insulating connection plate 33.
In other embodiments, the insulating member 3 may be an insulating tape attached to a mounting gap formed by mounting the upper cover 5 and the base 1, and may also serve to improve phase-to-phase insulation and ground insulation.
Claims (10)
1. The utility model provides a moulded case circuit breaker, includes base (1), release (2) and upper cover (5), upper cover (5) and base (1) cooperation installation, form cavity (11) that are used for holding release (2), its characterized in that: the tripping device is characterized by further comprising an insulating component (3), wherein the insulating component (3) is arranged in the cavity (11), is positioned on one side of the tripping device (2) and is positioned at an assembly gap formed by assembling the upper cover (5) and the base (1), and separates the tripping device (2) from the assembly gap.
2. The molded case circuit breaker according to claim 1, wherein after the upper cover (5) and the base (1) are assembled in place, an assembly gap is formed between the spaced ribs (13) of the base (1) and the upper cover spaced ribs (51) of the upper cover (5), the insulating member (3) on the side of the trip unit (2) close to the spaced ribs (13) is disposed at the assembly gap, the upper edge of the insulating member (3) is higher than the assembly gap, and the lower edge of the insulating member is lower than the assembly gap.
3. A molded case circuit breaker according to claim 1, wherein after the upper cover (5) and the base (1) are assembled in place, an assembly gap is formed between the base side plate (14) of the base (1) and the upper cover side plate (52) of the upper cover (5), the insulating member (3) on the side of the trip unit (2) close to the base side plate (14) is disposed at the assembly gap, and the upper edge of the insulating member (3) is higher than the assembly gap and the lower edge is lower than the assembly gap.
4. A molded case circuit breaker according to any one of claims 1 to 3, wherein the insulating member (3) has a bent portion extending in a height direction on both side edges thereof, and the bent portion is bent toward a side close to the trip unit (2).
5. A molded case circuit breaker according to claim 2, wherein said insulating member (3) is clamped between the trip unit (2) and the spaced ribs (13), and when the upper cover (5) and the base (1) are assembled in place, the bottom of the insulating member (3) is located on the installation plane of the trip unit (2) and the top thereof is located on the top surface (53) of the upper cover (5).
6. A molded case circuit breaker according to claim 3, characterized in that said insulating member (3) is clamped between the trip unit (2) and the base side plate (14), and after the upper cover (5) and the base (1) are assembled in place, the bottom of the insulating member (3) is located on the installation plane of the trip unit (2) and the top is located on the upper cover top surface (53) of the upper cover (5).
7. The molded case circuit breaker according to claim 4, wherein the insulating member (3) comprises a first insulating sheet (31) and a second insulating sheet (32), the first insulating sheet (31) is located at a side of the trip unit (2) close to the spaced ribs (13) between the adjacent phases of the base (1), the second insulating sheet (32) is located at a side of the trip unit (2) close to the base side plate (14) of the base (1), the first insulating sheet (31) has a first bending structure (311) extending in the height direction on the side edges of both sides, the second insulating sheet (32) has a second bending structure (312) extending in the height direction on the side edges of both sides, and the first bending structure (311) and the second bending structure (312) are respectively bent to a side close to the trip unit (2).
8. The molded case circuit breaker according to claim 7, wherein the base (1) has a draw bar (4) disposed in the cavity (11), and the first insulating sheet (31) and the second insulating sheet (32) have an insulating connecting plate (33) disposed at a side thereof adjacent to the draw bar (4) for connecting the first insulating sheet (31) and the second insulating sheet (32).
9. The molded case circuit breaker according to claim 8, wherein the base (1) further comprises a boss (12) in the cavity (11), the trip unit (2) comprises a conductor (21), a bimetal (22), a bracket (23), an armature (24) and a spring (25), the conductor (21) is supported on the bracket (23), the bimetal (22) is connected to the conductor (21), one end of the spring (25) is connected to the bracket (23), the other end of the spring is connected to the upper end of the armature (24), and the armature (24) is limited on the boss (12) by the action of the spring (25) at the installation position; the insulation connecting plate (33) is arranged in the middle of the first insulation sheet (31) and the second insulation sheet (32), and a space between the first insulation sheet (31) and the second insulation sheet (32) and located at the upper part and the lower part of the insulation connecting plate (33) forms a hollow cavity (34) which does not obstruct the action of the armature (24).
10. The molded case circuit breaker as claimed in claim 1, wherein the insulating member (3) is an insulating tape attached to an assembly gap formed by the assembly of the upper cover (5) and the base (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011476122.XA CN112509883A (en) | 2020-12-15 | 2020-12-15 | Plastic case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011476122.XA CN112509883A (en) | 2020-12-15 | 2020-12-15 | Plastic case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112509883A true CN112509883A (en) | 2021-03-16 |
Family
ID=74973612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011476122.XA Pending CN112509883A (en) | 2020-12-15 | 2020-12-15 | Plastic case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112509883A (en) |
-
2020
- 2020-12-15 CN CN202011476122.XA patent/CN112509883A/en active Pending
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