CN2524363Y - Electric force compensation structure of main contacts of low voltage vacuum circuit breaker - Google Patents
Electric force compensation structure of main contacts of low voltage vacuum circuit breaker Download PDFInfo
- Publication number
- CN2524363Y CN2524363Y CN 01252874 CN01252874U CN2524363Y CN 2524363 Y CN2524363 Y CN 2524363Y CN 01252874 CN01252874 CN 01252874 CN 01252874 U CN01252874 U CN 01252874U CN 2524363 Y CN2524363 Y CN 2524363Y
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- CN
- China
- Prior art keywords
- circuit breaker
- vacuum circuit
- main contacts
- force compensation
- electric
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- 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 - Lifetime
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Abstract
The utility model relates to an electric force compensation structure of main contacts of low voltage vacuum circuit breaker, which is characterized in that movable bus electric compensation method is adopted to solve the repulsion force compensation problem of the butt joint type single joint main contact. The utility model adopts two electric repulsion forces which are formed by conflux lines with opposite current flowing directions to compensate the movable contact pressure of the vacuum arc extinguish chamber; the bigger the current is, the bigger the compensation force is. The electric force compensation structure of main contacts successfully solves the arc extinguish problem of the vacuum circuit breaker, which is a bran-new technical proposal.
Description
(1) technical field.The utility model relates to a kind of low-tension intelligent type vacuum circuit-breaker main contact electric power collocation structure, belongs to the low-voltage vacuum circuit breaker technical field.
(2) background technology.Low-voltage circuit breaker is as a kind of low-pressure electronic equipment product that has a large capacity and a wide range; be widely used in the distribution network; as the usefulness of overload, short circuit and the under-voltage protection of circuit and power-supply device, also can be used as disjunction and overload, short circuit and under-voltage protection in motor starting and the running.The low pressure frame-type circuit breaker that adopts on the present domestic and international market, the overwhelming majority is the circuit breaker of air type arc quenching method.Because the contact arc-extinguishing structure of air type circuit breaker is the compensation main contact that main contact adopts the multi-channel parallel mode, when the big short circuit current of appearance passes through, phenomenon appears being scolded out in main contact, if several shunting contacts are arranged, then can reduce, have several contacts just to reduce part for the suffered repulsion in each contact.Because it is indoor that every phase main contact of vacuum circuit-breaker is enclosed in the vacuum extinction with condition of high vacuum degree, the shunt contact in parallel that can not make more complicated between the quiet moving contact of homophase is to reach compensating action.
(3) summary of the invention.The purpose of this utility model provides a kind of low-voltage vacuum circuit breaker main contact electric power collocation structure, to solve the repulsion compensation problem of dock single contact main contact.
Solution of the present utility model is to adopt the movable bus in the vacuum circuit-breaker to arrange electronic compensation way, the opposite electrodynamic repulsion force that forms of the current direction that this two bus-bars form compensates the indoor moving contact pressure of vacuum extinction, the electric current that passes through is big more, and balancing force is also big more.Adopt this programme to make vacuum circuit-breaker become possibility in the arc extinguishing problem.
(4) description of drawings.
Fig. 1 is a low-voltage vacuum circuit breaker contact electric power collocation structure schematic diagram of the present utility model.
Wherein 1 is that structural framing, 2 is that inlet wire busbar, 3 is that stainless steel stent, 4 is that tripping spring, 5 is that vacuum interrupter, 6 is moving conductive rod.
(5) embodiment.
With reference to Fig. 1, when the primary circuit current i when u font inlet wire busbar 1 flows through, because the current opposite in direction that current i forms on word u font is flexible coupling conductor busbar 1, the moving conductive rod 6 that makes it to link to each other with vacuum interrupter 5 is subjected to a mutual expelling force F (being reflected in contact is contact pressure), when the primary circuit electric current is big more, during as short-circuit condition, then its repulsion F is also just big more, this just makes contact when big short circuit current, enough confining forces are arranged, and only to keep contact pressure with spring mode be not enough to compensate general circuit breaker main contact.Total is as follows: at ragged edge is structural framing 1, fixing inlet wire busbar 2 with moving guide rod 6, is a vacuum interrupter 5 in its outside below inlet wire busbar 2 in the middle, one end of tripping spring 4 is fixed on the bottom of framework 1, and the other end is fixed on the stainless steel stent 3.Because the elastic force of tripping spring 4 is limited, so just compensate by electric repulsion.
It more than is the utility model optimum implementation.
Claims (1)
1, a kind of low-voltage vacuum circuit breaker main contact electric power collocation structure, the collocation structure of forming by the multi-channel parallel mode, its feature adopts main contact electric power compensatory approach at its collocation structure, its key is with the conduction inlet wire busbar (2) that is flexible coupling, inlet wire busbar (2) becomes the U font, be connected with the moving conductive rod (6) in the vacuum interrupter (5), above-mentioned part places the center of structural framing (1), one end of tripping spring (4) is fixed on the bottom of structural framing (1), and the other end is fixed on the stainless steel stent (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01252874 CN2524363Y (en) | 2001-08-03 | 2001-08-03 | Electric force compensation structure of main contacts of low voltage vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01252874 CN2524363Y (en) | 2001-08-03 | 2001-08-03 | Electric force compensation structure of main contacts of low voltage vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2524363Y true CN2524363Y (en) | 2002-12-04 |
Family
ID=33662473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01252874 Expired - Lifetime CN2524363Y (en) | 2001-08-03 | 2001-08-03 | Electric force compensation structure of main contacts of low voltage vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2524363Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097247A (en) * | 2011-01-31 | 2011-06-15 | 常熟开关制造有限公司(原常熟开关厂） | Vacuum circuit breaker with electromotive force compensation circuit |
-
2001
- 2001-08-03 CN CN 01252874 patent/CN2524363Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097247A (en) * | 2011-01-31 | 2011-06-15 | 常熟开关制造有限公司(原常熟开关厂） | Vacuum circuit breaker with electromotive force compensation circuit |
| CN102097247B (en) * | 2011-01-31 | 2013-03-20 | 常熟开关制造有限公司(原常熟开关厂） | Vacuum circuit breaker with electromotive force compensation circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100824 Address after: 200063 No. 505, Wuning Road, Shanghai Patentee after: Shanghai Electrical Apparatus Research Institute Co., Ltd. Address before: 200063 No. 505, Wuning Road, Shanghai Patentee before: Shanghai Electric Appliance Sci. Inst. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110803 Granted publication date: 20021204 |