CN2388706Y - DC circuit breaker - Google Patents
DC circuit breaker Download PDFInfo
- Publication number
- CN2388706Y CN2388706Y CN 99225029 CN99225029U CN2388706Y CN 2388706 Y CN2388706 Y CN 2388706Y CN 99225029 CN99225029 CN 99225029 CN 99225029 U CN99225029 U CN 99225029U CN 2388706 Y CN2388706 Y CN 2388706Y
- Authority
- CN
- China
- Prior art keywords
- moving contact
- utility
- arc
- model
- current
- 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.)
- Expired - Fee Related
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Abstract
The utility model relates to a DC circuit breaker of an electric apparatus for a protective system, which comprises an outer shell, a binding post, a magnetic tripping device, a handle, a locking element, a moving contact, double metal sheets, an arc striking angle and an arc-extinguishing chamber. The utility model is characterized in that two permanent magnet blocks are respectively arranged on the shell body of both sides of the end part of the moving contact; the magnetic tripping device used for tripping short-circuit current is arranged on the left of the moving contact; the double metal sheets used for tripping overload current can be arranged on the right of the moving contact. Because the utility model adopts the permanent magnet arc-extinguishing technology, the utility model has the advantages that the contact can not be excessively worn under the condition of breaking great current, and the arcing time is short under the condition of breaking small current; the safe operation of the electrical devices can be fully protected.
Description
The utility model belongs to technical field of power systems, specifically a kind of dc circuit breaker that is used for the protection system electric equipment.
In the switchgear of electric power system; adopt the dc operation system to control in a large number; and AC circuit breaker is generally used in the protection of DC motor; because ac electric apparatus cuts off the direct-current arc ability; cause the contact electric arc can't disjunction and cause the operation troubles of electric equipment, the safe and reliable operation of serious threat electric power system electric equipment easily.
The purpose of this utility model provides a kind of permanent magnetism arc extinguishing type dc circuit breaker.
The purpose of this utility model is achieved in that it comprises bus binding post, magnetic release, handle, latch fitting, tripping, moving contact, bimetal leaf, the arc leading angle of shell, in-out end, it is characterized in that on the housing of both sides, moving contact end, being respectively arranged with a permanent magnets, be provided with a magnetic release that is used to thread off short circuit current in the left side of moving contact, be provided with a bimetal leaf that is used to thread off overload current on the right side of moving contact.
The utility model is owing to adopt permanent magnetism arc extinguishing technology on the basis of AC circuit breaker, can the excessive wear contact when therefore having the big electric current of disjunction, and long advantage of arcing time can not appear during the little electric current of disjunction.Thereby protected the safe operation of electric power system electric equipment fully.
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is a sectional structure simplified schematic diagram of the present utility model
By shown in Figure 1, among the figure 1 is that shell, 2 is handle and latch fitting 5, tripping 6, moving contact 8 for the bus binding post of leading-out terminal, 4 for the bus binding post of end of incoming cables, 9, on the housing of the both sides, end of moving contact 8, be respectively arranged with a permanent magnets 12, be provided with a magnetic release 3 that is used to thread off short circuit current in the left side of moving contact, be provided with a bimetal leaf 10 that is used to thread off overload current on the right side of moving contact, also be provided with an arc leading angle and arc control device at the downside of moving contact.Among the figure 7 is the conductor that is flexible coupling between moving contact and the bimetal leaf 10 in addition.During use, when overload or short circuit current act on bimetal leaf 10 and magnetic and take off each device 3, tripping 6 promotes latch fitting 5 and makes moving contact of breaker 8 trippings, the electric arc that produces between contact enters arc control device 13 through arc leading angle 11 under the magnetic field force effect that permanent magnets 12 produces, electric arc reliably extinguishes in arc control device.
Claims (1)
1, a kind of dc circuit breaker that is applicable to electric equipment in the protection system; it comprises bus binding post, magnetic release, handle, latch fitting, tripping, moving contact, bimetal leaf, arc leading angle, the arc control device of shell, in-out end; it is characterized in that on the housing of both sides, moving contact end, being respectively arranged with a permanent magnets; be provided with a magnetic release that is used to thread off short circuit current in the left side of moving contact, be provided with a bimetal leaf that is used to thread off overload current on the right side of moving contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99225029 CN2388706Y (en) | 1999-09-10 | 1999-09-10 | DC circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99225029 CN2388706Y (en) | 1999-09-10 | 1999-09-10 | DC circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2388706Y true CN2388706Y (en) | 2000-07-19 |
Family
ID=34014967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99225029 Expired - Fee Related CN2388706Y (en) | 1999-09-10 | 1999-09-10 | DC circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2388706Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262985A (en) * | 2011-01-11 | 2011-11-30 | 沈阳二一三控制电器制造有限公司 | Multipolar DC molded case circuit breaker |
-
1999
- 1999-09-10 CN CN 99225029 patent/CN2388706Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262985A (en) * | 2011-01-11 | 2011-11-30 | 沈阳二一三控制电器制造有限公司 | Multipolar DC molded case circuit breaker |
| CN102262985B (en) * | 2011-01-11 | 2014-02-26 | 沈阳二一三控制电器制造有限公司 | Multipolar DC molded case circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |