GB2450809A - Circuit breaker incorporating an arc barrier - Google Patents
Circuit breaker incorporating an arc barrier Download PDFInfo
- Publication number
- GB2450809A GB2450809A GB0813287A GB0813287A GB2450809A GB 2450809 A GB2450809 A GB 2450809A GB 0813287 A GB0813287 A GB 0813287A GB 0813287 A GB0813287 A GB 0813287A GB 2450809 A GB2450809 A GB 2450809A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arc barrier
- movable contact
- arc
- plate
- movable
- 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.)
- Granted
Links
Classifications
-
- 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
- H01H9/32—Insulating body insertable between contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/20—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
-
- 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
A circuit breaker includes a housing (1), a wire connection (3), a switch assembly (2), an arc extinguishment device (8), a stationary contact (5), a movable contact (6) and an arc barrier device (7). The arc barrier device includes an arc barrier plate (71) and a resting plate (72) perpendicular to the arc barrier plate. Thus, the arc barrier plate of the arc barrier device is driven by the movable contact to move to a position between the movable contact and the stationary contact to quickly extinguish the arc between the movable contact and the stationary contact, thereby preventing the movable contact and the stationary contact from being eroded by the arc due to a long arcing time of the arc so as to protect the movable contact and the stationary contact.
Description
CIRCUIT BREAKER INCORPORATING AN ARC BARRIER
The present invention relates to a breaker and, more particularly, to a circuit breaker that incorporates an "arc barrier" to extinguish the arc so as to isolate the arc.
A conventional circuit breaker comprises housing, a wire connection, a switch assembly, an arc extinguishment device, a stationary contact, and a movable contact. The arc extinguishment device is used to extinguish the arc between the movable contact and the stationary contact. When the movable contact is opened, an arc is produced and is guided by an arc runner into the arc extinguishment device. However, when the arc is guided by the arc runner into the arc extinguishing device, a portion of the arc is still burning between the movable contact and the stationary contact and is disposed in potentially a damaging rate. Although the movable contact and the stationaly contact are spaced from each other by a determined distance, the very hot and conductive arc can still burn so that the movable contact and the stationary contact burn and erode. In this state the arc continues to conduct electricity. Thus, the movable contact and the stationary contact are easily destroyed by the arc.
In accordance with the present invention, there is provided a circuit breaker comprising a housing, a wire connection, a switch assembly, an arc extinguishment device, a stationary contact, a movable contact. The circuit breaker further comprises an arc barrier device. The arc barrier device includes an arc barrier plate and a resting plate perpendicular to the arc barrier plate.
The movable contact is located between the arc barrier plate and the resting plate of the arc barrier device and is movable to push and move the arc barrier plate and the resting plate of the arc barrier device. The movable contact is movable to push and move the resting plate of the arc barrier device so that the arc barrier plate of the arc barrier device is movable to a position between the movable contact and the stationary contact to isolate the movable contact from the stationary contact.
The primary objective of the present invention is to provide a circuit breaker that can extinguish the arc quickly and exactly.
Another objective of the present invention is to provide a circuit breaker, wherein the arc barrier plate of the arc barrier device is driven by the movable contact to move to the position between the movable contact and the stationary contact to quickly extinguish the arc between the movable contact and the stationary contact, thereby preventing the movable contact and the stationary contact from being eroded by the arc due to continuing plasma of the arc, so as to protect the movable contact and the stationary contact.
A further objective of the present invention is to provide a circuit breaker, wherein movement of the arc barrier plate of the arc barrier device is controlled by the travel of the movable contact to extinguish the arc between the movable contact and the stationary contact exactly and quickly so as to protect the movable contact and the stationary contact without affecting connection between the movable contact and the stationary contact.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
In the drawings: Fig. 1 is a front view of a circuit breaker in accordance with the preferred embodiment of the present invention.
Fig. 2 is a perspective view of an arc barrier device of the circuit breaker as shown in Fig. I. Fig. 3 is a side view of the arc barrier device of the circuit breaker as shown in Fig. 2.
Fig. 4 is a top view showing a state of the arc barrier device of the circuit breaker when the circuit breaker is opened.
Fig. 5 is a top view showing a state of the arc barrier device of the circuit breaker when the circuit breaker is closed.
Referring to the drawings and initially to Fig. 1, a circuit breaker in accordance with the preferred embodiment of the present invention comprises a housing 1, a wire connection 3, a switch assembly 2, a tripping device 4, an arc extinguishment device 8, a stationary contact 5, a movable contact 6 and an arc barrier device 7. The switch assembly 2 includes a handle 20, a link 21, a contact support 22, and an aluminum bracket 23. The switch assembly 2 is connected to the movable contact 6 to control operation of the movable contact 6. The stationary contact 5 is mounted on the housing 1. The tripping device 4 is mounted on the housing 1 and includes a solenoid coil, a toroid coil, a locking snap, a current transformer and a printed circuit board. Thus, when a current imbalance (earth leakage) or short-circuit occurs to the circuit breaker, the tripping device 4 is operated either by the solenoid operation or by the bi-metal trip unit thus opening the circuit breaker.
Referring to Figs. 2-5 with reference to Fig. 1, the arc barrier device 7 is pivotally mounted on the housing 1 and located between the stationary contact 5 and the movable contact 6. The arc barrier device 7 includes an arc barrier plate 71 and a resting plate 72 perpendicular to the arc barrier plate 71.
The resting plate 72 of the arc barrier device 7 has an end connected with an end of the arc barrier plate 71. The arc barrier device 7 further includes a pivot shaft 70 pivotally mounted on the housing 1 and located between the arc barrier plate 71 and the resting plate 72 to connect the arc barrier plate 71 and the resting plate 72. The pivot shaft 70 has a longitudinal direction that is perpendicular to a movement direction of the movable contact 6.
In practice, the movable contact 6 is located between the arc barrier plate 71 and the resting plate 72 of the arc barrier device 7 and is movable to push and move the arc barrier plate 71 and the resting plate 72 of the arc barrier device 7.
In such a manner, the movable contact 6 is movable to push and move the arc barrier plate 71 of the arc barrier device 7 so that the arc barrier plate 71 of the arc barrier device 7 is movable to detach from the movable contact 6 as shown in Fig. 4 and to connect the movable contact 6 to the stationary contact 5. At the same time, the resting plate 72 of the arc barrier device 7 is movable to abut the movable contact 6. In addition, the arc barrier plate 71 of the arc barrier device 7 is parallel with the movable contact 6, and the resting plate 72 of the arc barrier device 7 is perpendicular to the movable contact 6.
Alternatively, the movable contact 6 is movable to push and move the resting plate 72 of the arc barrier device 7 so that the arc barrier plate 71 of the arc barrier device 7 is movable to a position between the movable contact 6 and the stationary contact 5 as shown in Fig. 5 to isolate the movable contact 6 from the stationary contact 5. At the same time, the resting plate 72 of the arc barrier device 7 is movable to detach from the movable contact 6. In addition, the arc barrier plate 71 of the arc barrier device 7 is perpendicular to the movable contact 6, and the resting plate 72 of the arc barrier device 7 is parallel with the movable contact 6.
In operation, referring to Figs. 4 and 5 with reference to Figs. 1-3, when the circuit breaker is closed, the arc barrier plate 71 of the arc barrier device 7 is initially parallel with the movable contact 6, and the resting plate 72 of the arc barrier device 7 is perpendicular to the movable contact 6 as shown in Fig. 4. At the same time, the movable contact 6 has a first side abutting the stationary contact 5 and a second side abutting the resting plate 72 of the arc barrier device 7.
In such a manner, when the circuit breaker is opened, the movable contact 6 moves to the left to detach from the stationary contact 5 and to push and move the resting plate 72 of the arc barrier device 7 so that the arc barrier plate 71 of the arc barrier device 7 is movable to the position between the movable contact 6 and the stationary contact 5 as shown in Fig. 5 to isolate the movable contact 6 from the stationary contact 5 and to control and extinguish the arc between the movable contact 6 and the stationary contact 5 so as to isolate the arc exactly.
On the contrary, when the circuit breaker is closed, the movable contact 6 moves to the right toward the stationary contact 5 and to push and move the arc barrier plate 71 of the arc barrier device 7, so that the arc barrier plate 71 of the arc barrier device 7 is movable to detach from the movable contact 6 as shown in Fig. 4 and to connect the movable contact 6 to the stationary contact 5. Thus, the arc barrier plate 71 of the arc barrier device 7 will not interfere with connection between the movable contact 6 and the stationary contact 5.
Accordingly, the arc barrier plate 71 of the arc barrier device 7 is driven by the movable contact 6 to move to the position between the movable contact 6 and the stationary contact 5 to quickly extinguish the arc between the movable contact 6 and the stationary contact 5, thereby preventing the movable contact 6 and the stationary contact 5 from being penetrated by the arc due to a long stay of the arc so as to protect the movable contact 6 and the stationary contact 5. In addition, movement of the arc barrier plate 71 of the arc barrier device 7 is controlled by movement of the movable contact 6 to extinguish the arc between the movable contact 6 and the stationary contact 5 exactly and quickly so as to protect the movable contact 6 and the stationary contact 5 without affecting connection between the movable contact 6 and the stationary contact 5.
Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.
Claims (15)
1. A circuit breaker comprising a housing, a wire connection, a switch assembly, an arc extinguishing device, a stationary contact, a movable contact; wherein: S the circuit breaker further comprises an arc barrier device; the arc barrier device includes an arc barrier plate and a resting plate perpendicular to the arc barrier plate; the movable contact is located between the arc barrier plate and the resting plate of the arc barrier device and is movable to push and move the arc barrier plate and the resting plate of the arc barrier device.
2. The circuit breaker in accordance with claim 1, wherein the arc barrier device is pivotally mounted on the housing and located between the stationary contact and the movable contact.
3. The circuit breaker in accordance with claim 1, wherein the movable contact is movable to push and move the arc barrier plate of the arc barrier device so that the arc barrier plate of the arc barrier device is movable to detach from the movable contact and to connect the movable contact to the stationary contact.
4. The circuit breaker in accordance with claim 3, wherein the resting plate of the arc barrier device is movable to abut the movable contact when the arc barrier plate of the arc barrier device is movable to detach from the movable contact.
5. The circuit breaker in accordance with claim 3, wherein the arc barrier plate of the arc barrier device is parallel with the movable contact and the resting plate of the arc barrier device is perpendicular to the movable contact when the arc barrier plate of the arc barrier device is movable to detach from the movable contact.
6. The circuit breaker in accordance with claim 1, wherein the movable contact is movable to push and move the resting plate of the arc barrier device so that the arc barrier plate of the arc barrier device is movable to a position between the movable contact and the stationary contact to isolate the movable contact from the stationary contact.
7. The circuit breaker in accordance with claim 6, wherein the resting plate of the arc barrier device is movable to detach from the movable contact when the arc barrier plate of the arc barrier device is movable to the position between the movable contact and the stationary contact.
8. The circuit breaker in accordance with claim 6, wherein the arc barrier plate of the arc barrier device is perpendicular to the movable contact, and the resting plate of the arc barrier device is parallel with the movable contact when the arc barrier plate of the arc barrier device is movable to the position between the movable contact and the stationary contact.
9. The circuit breaker in accordance with claim 1 wherein the arc barrier device further includes a pivot shaft pivotally mounted on the housing and located between the arc barrier plate and the resting plate to connect the arc barrier plate and the resting plate.
10. The circuit breaker in accordance with claim 9, wherein the pivot shaft has a longitudinal direction that is perpendicular to a movement direction of the movable contact.
11. The circuit breaker in accordance with claim 1, wherein the resting plate of the arc barrier device has an end connected with an end of the arc barrier plate.
12. The circuit breaker in accordance with claim I, further comprising a tripping device mounted on the housing.
13. The circuit breaker in accordance with claim 1, wherein the switch assembly is connected to the movable contact to control operation of the movable contact.
14. The circuit breaker in accordance with claim 1, wherein the stationary contact is mounted on the housing; the movable contact is mounted on the switch assembly and located beside the stationary contact.
15. A circuit breaker constructed and arranged to operate substantially as hereinbefore described with reference to and as shown in the accompanying drawings. I0
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201266154U CN201084657Y (en) | 2007-08-04 | 2007-08-04 | A breaker with the arc-breaking/-quenching device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0813287D0 GB0813287D0 (en) | 2008-08-27 |
| GB2450809A true GB2450809A (en) | 2009-01-07 |
| GB2450809B GB2450809B (en) | 2010-09-01 |
Family
ID=39627129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0813287A Expired - Fee Related GB2450809B (en) | 2007-08-04 | 2008-07-21 | Circuit breaker incorporating an arc barrier |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN201084657Y (en) |
| DE (1) | DE202008010335U1 (en) |
| ES (1) | ES1068566Y (en) |
| GB (1) | GB2450809B (en) |
| IT (1) | ITUD20080026U1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486982A (en) * | 2010-12-03 | 2012-06-06 | 北京人民电器厂有限公司 | Breaker with forced flash barrier device |
| CN102543552A (en) * | 2012-01-16 | 2012-07-04 | 刘天保 | Electronic electromagnetic type intelligent switch for high-voltage power system |
| US9318284B2 (en) * | 2012-01-18 | 2016-04-19 | Carling Technologies, Inc. | Low-profile circuit breaker |
| CN102664113A (en) * | 2012-05-16 | 2012-09-12 | 安文胜 | Electric appliance switch taking flame-retardant insulating partition as breaking medium |
| CN102832062B (en) * | 2012-08-28 | 2015-02-04 | 北京人民电器厂有限公司 | Electrical appliance device with arc separating member |
| CN103681145B (en) * | 2012-08-30 | 2016-06-22 | 西门子公司 | Arc-control device and adopt the chopper of this arc-control device |
| CN103854931B (en) * | 2012-12-05 | 2016-12-21 | 西门子公司 | Arc-control device and use the chopper of this arc-control device |
| CN107359066B (en) * | 2017-08-23 | 2019-12-17 | 河北宝凯电气股份有限公司 | Clamp type arc extinguishing device for circuit breaker |
| CN107342197B (en) * | 2017-08-23 | 2020-06-09 | 河北宝凯电气股份有限公司 | Arc extinguishing device of sliding plate type circuit breaker |
| CN113096988A (en) * | 2021-03-30 | 2021-07-09 | 苏州飞腾电器有限公司 | Automatic change-over switch capable of rapidly switching off arc extinction |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0269750A1 (en) * | 1986-05-30 | 1988-06-08 | Mitsubishi Denki Kabushiki Kaisha | Switch |
| US5210385A (en) * | 1989-07-26 | 1993-05-11 | Merlin Gerin | Low voltage circuit breaker with multiple contacts for high currents |
-
2007
- 2007-08-04 CN CNU2007201266154U patent/CN201084657Y/en not_active Expired - Fee Related
-
2008
- 2008-07-21 GB GB0813287A patent/GB2450809B/en not_active Expired - Fee Related
- 2008-07-28 IT ITUD20080026 patent/ITUD20080026U1/en unknown
- 2008-08-01 ES ES200801662U patent/ES1068566Y/en not_active Expired - Fee Related
- 2008-08-01 DE DE200820010335 patent/DE202008010335U1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0269750A1 (en) * | 1986-05-30 | 1988-06-08 | Mitsubishi Denki Kabushiki Kaisha | Switch |
| US5210385A (en) * | 1989-07-26 | 1993-05-11 | Merlin Gerin | Low voltage circuit breaker with multiple contacts for high currents |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2450809B (en) | 2010-09-01 |
| CN201084657Y (en) | 2008-07-09 |
| GB0813287D0 (en) | 2008-08-27 |
| ES1068566U (en) | 2008-11-01 |
| DE202008010335U1 (en) | 2008-10-09 |
| ITUD20080026U1 (en) | 2009-02-05 |
| ES1068566Y (en) | 2009-02-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20120721 |