CN105097375A - High-breaking molded case circuit breaker - Google Patents
High-breaking molded case circuit breaker Download PDFInfo
- Publication number
- CN105097375A CN105097375A CN201510582715.7A CN201510582715A CN105097375A CN 105097375 A CN105097375 A CN 105097375A CN 201510582715 A CN201510582715 A CN 201510582715A CN 105097375 A CN105097375 A CN 105097375A
- Authority
- CN
- China
- Prior art keywords
- moving contact
- contact
- circuit breaker
- molded case
- case circuit
- 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
-
- 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
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a high-breaking molded case circuit breaker, which comprises a base, a moving contact, a static contact and an arc extinguishing cover, wherein the arc extinguishing cover is arranged between the moving contact and the static contact; a rotating shaft is arranged at the root part of the moving contact; a spring mounting base is arranged on the rotating shaft; a positioning stability compression spring is arranged in the spring mounting base; and the moving contact and the static contact are elongated current-limiting contacts. The moving contact and the static contact of the molded case circuit breaker are lengthened, so that the electromagnetic repulsion between the moving contact and the static contact at short-circuit current is increased; the short-circuit breaking capacity of the molded case circuit breaker is greatly improved; and Icu=Ics of series of molded case circuit breakers can be achieved. Meanwhile, due to excellent breaking capacity and excellent insulating property, the series of molded case circuit breakers can be subjected to transverse loading or lower lead-in in use. Therefore, a great convenience is brought for users for use. Meanwhile, a compression spring is adopted by the positioning stability compression spring disclosed by the invention, so that the defect that the traditional product employing a torsion spring works unstably is avoided; and the work reliability of the molded case circuit breaker is improved.
Description
Technical field
The present invention relates to a kind of low-voltage electrical apparatus, particularly relate to a kind of circuit breaker with plastic casing.
Background technology
Breaker of plastic casing is a kind of conventional protective device, and it has break-make load current and overload, short-circuit protection function to load current, is widely used in the overload of various electrical power distribution system and motor, short-circuit protection.Because the volume of breaker of plastic casing is little, structure is comparatively complicated, how to improve the short circuit breaking capacity of breaker of plastic casing and the job stability of breaker of plastic casing, is the target of electrical engineers' effort for it always.
Summary of the invention
The object of the present invention is to provide a kind of circuit breaker with plastic casing of stable work in work.
For achieving the above object, the arc-extinguish chamber that circuit breaker with plastic casing of the present invention comprises base, moving contact, fixed contact and is arranged between moving contact and fixed contact, the root of described moving contact is provided with rotating shaft, described rotating shaft is provided with spring mounting seat, in described spring mounting seat, is provided with positioning stablity spring.
Further setting, described positioning stablity spring is set to Compress Spring.
Further setting, described moving contact is set to extended type current limliting moving contact.
Further setting, described fixed contact comprises end of incoming cables and contact end, and described fixed contact is extended type current limliting fixed contact, the length that described contact end increases according to extended type current limliting moving contact and corresponding growth.
Further setting, described arc-extinguish chamber is set to extended type arc-extinguish chamber according to the length that dynamic and static contact increases.
More than arranging the beneficial effect brought is: due to moving of breaker of plastic casing, fixed contact obtains lengthening, add under short circuit current dynamic, electromagnetic repulsion force between fixed contact, opening speed is fast, tripping force is little, make, fixed contact is just rapid disjunction when short circuit current does not also reach peak value, due to the current limiting characteristic that it is excellent, the Icu=Ics of this Series Circuit Breakers can be accomplished, wherein rated current is 400A, the Icu=Ics=100kA of 800A series breaker of plastic casing, reach current domestically leading level, simultaneously due to breaking capacity and the good insulation property of its excellence, this serial breaker of plastic casing in use can carry out horizontal dress or lower inlet wire, this brings great convenience to the use of user, the breaker of plastic casing positioning stablity spring of traditional structure adopts torque spring, this structure due to during short circuit breaking moment huge electromagnetic repulsion force effect lower moving contact can excess of stroke action, positioning stablity torsion spring can drive moving contact travelling backwards certain distance and affect the functional reliability of breaker of plastic casing, positioning stablity spring of the present invention adopts Compress Spring just can avoid the generation of this situation, thus improve the functional reliability of breaker of plastic casing.
Accompanying drawing explanation
The circuit breaker with plastic casing overall structure figure of Fig. 1 to be rated current of the present invention be 400A;
Fig. 2 is Fig. 1 mono-phase moving contact, fixed contact three-dimensional structure diagram;
Fig. 3 is the A-A profile of Fig. 2;
The oscillogram that Fig. 4 is rated current of the present invention when being the circuit breaker with plastic casing disjunction short circuit current of 400A.
Embodiment
Embodiment 1:
As shown in FIG. 1 to 3, a kind of rated current is the circuit breaker with plastic casing of 400A, comprise base 1, moving contact 3, fixed contact 4 and the arc-extinguish chamber 2 be arranged between moving contact 3, fixed contact 4, the root of described moving contact 3 is provided with rotating shaft 303, described rotating shaft 303 is provided with spring mounting seat 301, in described spring mounting seat 301, be provided with two positioning stablity springs 302.
Further setting, described positioning stablity spring 302 is Compress Spring
Further setting, described moving contact 3 is extended type current limliting moving contact, and it increases 7mm on the basis of traditional moving contact.
Further setting, described fixed contact 4 comprises end of incoming cables 401 and contact end 402, and described fixed contact 4 is extended type current limliting fixed contact, and described contact end 402 increases 7mm on the basis of conventional contact end.
Further setting, the length relative set that described arc-extinguish chamber 2 increases according to moving contact 3, fixed contact 4 is extended type arc-extinguish chamber.
As can be seen from the oscillogram of Fig. 4, rated current is the circuit breaker with plastic casing of 400A, and its prospective short circuit current is 228kA, and actual breaking current is 46.4A, and its current limliting coefficient is 46.4/228=0.22, and the short circuit breaking time is only 7.5ms.
Embodiment 2:
Rated current is a circuit breaker with plastic casing of 100A, and its structure is with embodiment 1, and described moving contact 3 is extended type current limliting moving contact, and it increases 5mm on the basis of traditional moving contact.
Further setting, described fixed contact 4 is extended type current limliting fixed contact, and described contact end 402 increases 5mm on the basis of conventional contact end.
Embodiment 3:
Rated current is a circuit breaker with plastic casing of 800A, and its structure is with embodiment 1, and described moving contact 3 is extended type current limliting moving contact, and it increases 12mm on the basis of traditional moving contact.
Further setting, described fixed contact 4 is extended type current limliting fixed contact, and described contact end 402 increases 12mm on the basis of conventional contact end.
It should be noted that; above-described embodiment is only for example of the present invention is clearly described; and the restriction not to execution mode; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here exhaustive without the need to also giving all execution modes, and thus the apparent change of extending out or variation be still among protection scope of the present invention.
Claims (4)
1. a circuit breaker with plastic casing, the arc-extinguish chamber comprising base, moving contact, fixed contact and be arranged between moving contact and fixed contact, it is characterized in that: the root of described moving contact is provided with rotating shaft, described rotating shaft is provided with spring mounting seat, in described spring mounting seat, is provided with positioning stablity spring.
2. circuit breaker with plastic casing according to claim 1, is characterized in that: described positioning stablity spring is set to Compress Spring.
3. circuit breaker with plastic casing according to claim 1, is characterized in that: described moving contact is set to extended type current limliting moving contact.
4. circuit breaker with plastic casing according to claim 1, described fixed contact comprises end of incoming cables and contact end, it is characterized in that: described fixed contact is extended type current limliting fixed contact, the length that described contact end increases according to extended type current limliting moving contact and corresponding growth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510582715.7A CN105097375A (en) | 2015-09-14 | 2015-09-14 | High-breaking molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510582715.7A CN105097375A (en) | 2015-09-14 | 2015-09-14 | High-breaking molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105097375A true CN105097375A (en) | 2015-11-25 |
Family
ID=54577569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510582715.7A Pending CN105097375A (en) | 2015-09-14 | 2015-09-14 | High-breaking molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105097375A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908674A (en) * | 2023-09-12 | 2023-10-20 | 川开电气有限公司 | Method and system for monitoring and predicting residual life of circuit breaker |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105824A (en) * | 1985-07-18 | 1987-02-18 | 西屋电气公司 | The molded case circuit breaker that can keep the movable electrical contact position |
| CN200986902Y (en) * | 2006-12-06 | 2007-12-05 | 温州奥来电器有限公司 | Energy-storing high breaking small-sized breaker |
| CN201340828Y (en) * | 2009-03-31 | 2009-11-04 | 上海电科博耳电器开关有限公司 | Breaker contact structure |
| CN101958211A (en) * | 2009-12-09 | 2011-01-26 | 上海诺雅克电气有限公司 | Circuit-breaker automatic closing contact device with high breaking capacity |
| CN102243943A (en) * | 2010-05-13 | 2011-11-16 | 上海华联低压电器有限公司 | Falling-prevention contact mechanism of low-voltage circuit breaker |
| CN102427001A (en) * | 2011-11-08 | 2012-04-25 | 江苏辉能电气有限公司 | Contact pressure control mechanism for molded case low-voltage circuit breaker |
| CN203521342U (en) * | 2013-10-31 | 2014-04-02 | 德力西电气有限公司 | Contact system of breaker |
| CN204991637U (en) * | 2015-09-14 | 2016-01-20 | 北京明日电器设备有限责任公司 | Disconnected moulded case circuit breaker of high score |
-
2015
- 2015-09-14 CN CN201510582715.7A patent/CN105097375A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105824A (en) * | 1985-07-18 | 1987-02-18 | 西屋电气公司 | The molded case circuit breaker that can keep the movable electrical contact position |
| CN200986902Y (en) * | 2006-12-06 | 2007-12-05 | 温州奥来电器有限公司 | Energy-storing high breaking small-sized breaker |
| CN201340828Y (en) * | 2009-03-31 | 2009-11-04 | 上海电科博耳电器开关有限公司 | Breaker contact structure |
| CN101958211A (en) * | 2009-12-09 | 2011-01-26 | 上海诺雅克电气有限公司 | Circuit-breaker automatic closing contact device with high breaking capacity |
| CN102243943A (en) * | 2010-05-13 | 2011-11-16 | 上海华联低压电器有限公司 | Falling-prevention contact mechanism of low-voltage circuit breaker |
| CN102427001A (en) * | 2011-11-08 | 2012-04-25 | 江苏辉能电气有限公司 | Contact pressure control mechanism for molded case low-voltage circuit breaker |
| CN203521342U (en) * | 2013-10-31 | 2014-04-02 | 德力西电气有限公司 | Contact system of breaker |
| CN204991637U (en) * | 2015-09-14 | 2016-01-20 | 北京明日电器设备有限责任公司 | Disconnected moulded case circuit breaker of high score |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908674A (en) * | 2023-09-12 | 2023-10-20 | 川开电气有限公司 | Method and system for monitoring and predicting residual life of circuit breaker |
| CN116908674B (en) * | 2023-09-12 | 2023-11-28 | 川开电气有限公司 | Method and system for monitoring and predicting residual life of circuit breaker |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151125 |