CN108666184B - Large-current miniature circuit breaker - Google Patents
Large-current miniature circuit breaker Download PDFInfo
- Publication number
- CN108666184B CN108666184B CN201710208052.1A CN201710208052A CN108666184B CN 108666184 B CN108666184 B CN 108666184B CN 201710208052 A CN201710208052 A CN 201710208052A CN 108666184 B CN108666184 B CN 108666184B
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- CN
- China
- Prior art keywords
- half part
- striking plate
- arc
- connecting part
- electromagnetic system
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
Abstract
The invention relates to a large-current miniature circuit breaker which comprises a shell, an operating mechanism, an electromagnetic system, an arc extinguishing cover and a wiring terminal, wherein the operating mechanism, the electromagnetic system, the arc extinguishing cover and the wiring terminal are arranged in the shell, the operating mechanism and the electromagnetic system are arranged on the upper part of the shell, the arc extinguishing cover is arranged below the electromagnetic system, the wiring terminal is arranged at two ends of the shell, the electromagnetic system comprises an electromagnetic coil and a fixed contact, two ends of the electromagnetic coil are respectively connected with the wiring terminal and the upper end of the fixed contact, the lower end of the fixed contact forms an inwards bent part, an upper arc striking plate extending to the upper part of the arc extinguishing cover is connected to the bent part, the upper arc striking plate extends in parallel along the upper end face of the arc extinguishing cover, the upper arc striking plate comprises a front half part and a rear half part, the front half part is connected with the fixed contact, and a gap is formed between the rear half part and the front half part. When the high-current arc-extinguishing device breaks high current, the current generated by electromagnetic induction can directly pass through the upper arc striking plate and be absorbed into the arc-extinguishing chamber to extinguish the arc, so that the arc-extinguishing speed is improved.
Description
Technical Field
The invention relates to a large-current miniature circuit breaker.
Background
The miniature circuit breaker, especially the miniature circuit breaker of heavy current can produce electric arc when breaking, and the electric arc cuts off the extinction along striking board leading to the inner wall of explosion chamber, and when heavy current breaks off, because the electric current reduces rapidly, electromagnetic coil can produce induced current and hinder the electric current to reduce to make the electric arc between stationary contact and the moving contact can not extinguish fast, influence the normal breaking of miniature circuit breaker, and improved the internal temperature rise of miniature circuit breaker, be one of them big hindrance that improves miniature circuit breaker rated current.
Disclosure of Invention
The invention aims to solve the technical problems and provide a large-current miniature circuit breaker for preventing hot gas and electric arc generated in an arc extinguishing chamber from channeling upwards.
In order to achieve the purpose, the invention adopts the high-current miniature circuit breaker which comprises a shell, an operating mechanism, an electromagnetic system, an arc extinguishing cover and a wiring terminal, wherein the operating mechanism, the electromagnetic system, the arc extinguishing cover and the wiring terminal are arranged in the shell, the operating mechanism and the electromagnetic system are arranged at the upper part of the shell, the arc extinguishing cover is arranged below the electromagnetic system, the wiring terminal is arranged at two ends of the shell, the electromagnetic system comprises an electromagnetic coil and a fixed contact, the two ends of the electromagnetic coil are respectively connected with the wiring terminal and the upper end of the fixed contact, the lower end of the fixed contact forms an inwards bent part, the bent part is connected with an upper arc striking plate extending to the upper part of the arc extinguishing cover, the upper arc striking plate extends in parallel along the upper end face of the arc extinguishing cover, the upper arc striking plate comprises a front half part and a rear half part, the front half part is connected with the fixed contact, and a gap is formed between the rear half part and the front half part.
The invention is further arranged that a notch is formed at the tail end of the front half part of the upper arc striking plate, and the front end of the rear half part of the upper arc striking plate forms a bulge to be inserted into the notch. Through the mutual matching of the convex and the concave notch, the electric arc can more easily cross the gap between the front half part and the rear half part of the upper arc striking plate through the mutual matching.
The invention is further arranged that the front end of the front half part of the upper arc striking plate is welded on the inner side of the bending part of the fixed contact.
The invention further provides that the wiring terminal comprises a wiring frame and a wiring board, the wiring board comprises an external connecting part, a transition part and an internal connecting part, the external connecting part and the internal connecting part are horizontally arranged, the transition part is vertically connected between the external connecting part and the internal connecting part, the external connecting part is inserted into the wiring frame, the internal connecting part is connected with one end of the electromagnetic coil, and the rear half part of the upper arc striking plate is connected on the transition part.
The invention has the beneficial effects that the upper arc striking plate extends from the lower end of the fixed contact to the wiring terminal, and a section of crack is arranged in the middle of the upper arc striking plate to cut off the current in normal power on, when large current is cut off, the current generated by electromagnetic induction can directly pass through the upper arc striking plate, and the reduction speed of the current passing through the upper arc striking plate is far faster than that of the electromagnetic coil because the upper arc striking plate is far shorter than the electromagnetic coil, thereby achieving the purpose of rapidly reducing the current, realizing rapid cutting off of the electric arc and greatly improving the rated current of the miniature circuit breaker.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of an electromagnetic system in accordance with an embodiment of the present invention.
Fig. 3 is a schematic diagram of an electromagnetic system in accordance with an embodiment of the present invention.
Detailed Description
As shown in fig. 1-3, the specific embodiment of the invention is a high-current miniature circuit breaker, which comprises a shell 1, an operating mechanism 2, an electromagnetic system 3, an arc extinguishing cover 4 and a wiring terminal 5, wherein the operating mechanism 2 and the electromagnetic system 3 are arranged in the shell 1, the arc extinguishing cover 4 is arranged below the electromagnetic system 3, the wiring terminal 5 is arranged at two ends of the shell 1, the electromagnetic system 3 comprises an electromagnetic coil 31 and a fixed contact 32, two ends of the electromagnetic coil 31 are respectively connected with the wiring terminal 5 and the upper end of the fixed contact 32, the lower end of the fixed contact 32 forms an inward bent part 33, an upper arc striking plate 34 extending above the arc extinguishing cover 4 is connected to the bent part 33, the upper arc striking plate 34 extends in parallel along the upper end face of the arc extinguishing cover 4, the upper arc striking plate 34 comprises a front half 341 and a rear half 342, the front half 341 is connected with the fixed contact 32, the front end of the front half 341 is welded on the inner side of the bending part 33 of the fixed contact 32, the rear half 342 is connected with the wiring terminal 5, the wiring terminal 5 comprises a wiring frame 52 and a wiring board 51, the wiring board 51 comprises an outer connecting part 511, a transition part 512 and an inner connecting part 513, the outer connecting part 511 and the inner connecting part 513 are horizontally arranged, the transition part 512 is vertically connected between the outer connecting part 511 and the inner connecting part 513, the outer connecting part 511 is inserted in the wiring frame 52, the inner connecting part 513 is connected with one end of the electromagnetic coil 31, the rear half 342 of the upper arc striking plate 34 is connected on the transition part 512, a notch 343 is formed at the tail end of the front half 341 of the upper arc striking plate 34, a protrusion 344 is formed at the front end of the rear half 342 of the upper arc striking plate 34 and is inserted in the notch 343, and a gap 345 is formed between the rear half 342 and the front half 341 along the joint of the protrusion 344 and the notch 343.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. The utility model provides a miniature circuit breaker of heavy current, including the casing and set up operating device in the casing, electromagnetic system, the explosion chamber, binding post, operating device and electromagnetic system set up the upper portion at the casing, the explosion chamber sets up in the electromagnetic system below, binding post sets up at the casing both ends, electromagnetic system includes solenoid, the stationary contact, the solenoid both ends are connected with binding post and stationary contact upper end respectively, the stationary contact lower extreme forms the bending part of inwards bending, be connected with the last striking board that extends to the explosion chamber top on the bending part, go up the striking board and extend along explosion chamber up end parallel, its characterized in that: the upper arc striking plate comprises a front half part and a rear half part, the front half part is connected with the fixed contact, the rear half part is connected with the wiring terminal, and a gap is formed between the rear half part and the front half part.
2. The high-current miniature circuit breaker of claim 1, wherein: the tail end of the front half part of the upper arc striking plate is provided with a notch, and the front end of the rear half part of the upper arc striking plate is provided with a bulge which is inserted into the notch.
3. The high-current miniature circuit breaker according to claim 1 or 2, characterized in that: the front end of the front half part of the upper arc striking plate is welded on the inner side of the bending part of the fixed contact.
4. The high-current miniature circuit breaker according to claim 1 or 2, characterized in that: the wiring terminal comprises a wiring frame and a wiring board, the wiring board comprises an outer connecting part, a transition part and an inner connecting part, the outer connecting part and the inner connecting part are horizontally arranged, the transition part is vertically connected between the outer connecting part and the inner connecting part, the outer connecting part is inserted in the wiring frame, the inner connecting part is connected with one end of the electromagnetic coil, and the rear half part of the upper arc striking plate is connected on the transition part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710208052.1A CN108666184B (en) | 2017-03-31 | 2017-03-31 | Large-current miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710208052.1A CN108666184B (en) | 2017-03-31 | 2017-03-31 | Large-current miniature circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108666184A CN108666184A (en) | 2018-10-16 |
| CN108666184B true CN108666184B (en) | 2023-08-15 |
Family
ID=63783710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710208052.1A Active CN108666184B (en) | 2017-03-31 | 2017-03-31 | Large-current miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108666184B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0050719A1 (en) * | 1980-08-21 | 1982-05-05 | Heinrich Kopp GmbH & Co. KG | Contact and extinguishing means for electrical automatic miniature switches |
| CN102157312A (en) * | 2011-03-21 | 2011-08-17 | 常熟开关制造有限公司(原常熟开关厂） | Arc extinguishing device for miniature circuit breaker |
| CN103871796A (en) * | 2014-03-19 | 2014-06-18 | 云南追梦科技有限公司 | Magnetism enhancement and arc guide device of miniature circuit breaker and miniature circuit breaker provided with magnetism enhancement and arc guide device |
| CN204857638U (en) * | 2015-08-06 | 2015-12-09 | 浙江凯发电气股份有限公司 | Prepayment circuit breaker arc initiation device |
| CN205621691U (en) * | 2016-03-30 | 2016-10-05 | 浙江正泰电器股份有限公司 | Miniature circuit breaker |
| CN206639767U (en) * | 2017-03-31 | 2017-11-14 | 温州圣普电气有限公司 | High current miniature circuit breaker |
-
2017
- 2017-03-31 CN CN201710208052.1A patent/CN108666184B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0050719A1 (en) * | 1980-08-21 | 1982-05-05 | Heinrich Kopp GmbH & Co. KG | Contact and extinguishing means for electrical automatic miniature switches |
| CN102157312A (en) * | 2011-03-21 | 2011-08-17 | 常熟开关制造有限公司(原常熟开关厂） | Arc extinguishing device for miniature circuit breaker |
| CN103871796A (en) * | 2014-03-19 | 2014-06-18 | 云南追梦科技有限公司 | Magnetism enhancement and arc guide device of miniature circuit breaker and miniature circuit breaker provided with magnetism enhancement and arc guide device |
| CN204857638U (en) * | 2015-08-06 | 2015-12-09 | 浙江凯发电气股份有限公司 | Prepayment circuit breaker arc initiation device |
| CN205621691U (en) * | 2016-03-30 | 2016-10-05 | 浙江正泰电器股份有限公司 | Miniature circuit breaker |
| CN206639767U (en) * | 2017-03-31 | 2017-11-14 | 温州圣普电气有限公司 | High current miniature circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108666184A (en) | 2018-10-16 |
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