CN201788917U - Contact device for N pole incapable of extinguishing arc - Google Patents
Contact device for N pole incapable of extinguishing arc Download PDFInfo
- Publication number
- CN201788917U CN201788917U CN2010202798916U CN201020279891U CN201788917U CN 201788917 U CN201788917 U CN 201788917U CN 2010202798916 U CN2010202798916 U CN 2010202798916U CN 201020279891 U CN201020279891 U CN 201020279891U CN 201788917 U CN201788917 U CN 201788917U
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- CN
- China
- Prior art keywords
- contact
- moving contact
- moving
- circuit breaker
- pole
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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 a contact device for an N pole incapable of extinguishing arc, wherein the N pole is arranged on a small disconnector, a small isolator or a small circuit breaker. The contact device comprises a moving contact, a static contact and connection terminals. A contact is connected to one end of the static contact, the other end is connected with the connection terminal on one side, the moving contact is connected with the connection terminal on the other side flexibly, the static contact is an L-shaped sheet consisting of a long arm and a short arm, the long arm is arranged below the moving contact, the short arm turns upward to be basically parallel to the moving contact, and current in the short arm of the static contact is the same with the current of the moving contact in direction when the power is on. The contact device has the advantages that the currents flowing through the moving contact and the static contact have same directions, when short-circuit current is interrupted, the moving contact and the static contact have ampere forces attracting to each other, so that motion of the moving contact can be hindered certainly, further, the N pole has the 'make-before-break' function, a 'make-before-break' contact system is quite beneficial to integral breaking of a circuit breaker, and breaking capacity of the integral circuit breaker can be increased while the N pole is prevented from being damaged.
Description
Technical field
The utility model relates to a kind of contact apparatus, and especially a kind of small-sized isolator, small-sized isolating switch or miniature circuit breaker of being applicable to be not with the contact apparatus of the N utmost point of arc extinguishing ability.The characteristics that this contact apparatus has is simple in structure, help disjunction.
Background technology
The N utmost point of miniature circuit breaker, small-sized isolator or small-sized isolating switch do not possess the arc extinguishing ability, because the restriction of internal structure, the fixed contact of its contact system is electrically connected with side terminal, and moving contact is electrically connected with the binding post of opposite side by being flexible coupling.For the L utmost point of circuit breaker, because the N utmost point does not possess the arc extinguishing ability,, should produce electric arc at the L utmost point during disjunction short circuit current for fear of the damage of electric arc for the N utmost point as far as possible, electric arc is extinguished by the L utmost point.Therefore to achieve these goals, the extremely dynamic and static contact of requirement N when disjunction needs than separating behind the extremely dynamic and static contact of L.
The N utmost point of present isolator, isolating switch or circuit breaker is not considered the problems referred to above, when running into the short circuit current disjunction, flow through the current opposite in direction of dynamic and static contact, owing to have mutually exclusive power between the dynamic and static contact, therefore be easy to dynamic and static contact is scolded out, this might cause N ultimate ratio L to disconnect extremely earlier, produce breaking arc at the N utmost point, but because the N utmost point self does not possess the arc extinguishing ability, will cause circuit breaker N utmost point scaling loss, cause the whole damage of circuit breaker then.
The utility model content
At the deficiencies in the prior art, the utility model provides a kind of simple in structure, contact system that is used for small-sized isolator, small-sized isolating switch or the miniature circuit breaker N utmost point of helping disjunction.
The technical solution adopted in the utility model is as follows:
A kind of contact apparatus that is used for the N utmost point comprises moving contact, fixed contact and binding post, and the first end of stationary contact is connected with the contact, and the other end directly or indirectly is connected with side terminal; Moving contact directly or indirectly is connected with the opposite side binding post by being flexible coupling, and it is characterized in that:
The L shaped lamellar body of described fixed contact for constituting by long-armed and galianconism, its long-armed below that is positioned at moving contact, its galianconism is folded to top and substantially parallel with moving contact, and the sense of current during energising in the fixed contact galianconism is identical with the moving contact sense of current.
Side towards moving contact on the galianconism of described fixed contact is connected with the contact, and the long-armed far-end of fixed contact is connected with side terminal.
The beneficial effects of the utility model are: the sense of current that dynamic and static contact flows through in this contact system is identical, therefore during the disjunction short circuit current, have the Ampere force that attracts each other between the dynamic and static contact, this motion for moving contact can be played certain inhibition; Simultaneously, N has " close afterwards earlier and divide " function, and the contact system of this " close afterwards earlier and divide " is very favourable for the disjunction of circuit breaker integral body, can guarantee to improve the breaking capacity of circuit breaker integral body under the situation that the N utmost point is not damaged.
Description of drawings
Fig. 1 is the utility model circuit breaker N utmost point contact system structural representation.
Embodiment
The utility model provides a kind of contact system that is applicable to small-sized isolator, small-sized isolating switch or the miniature circuit breaker N utmost point.On structure, comprise fixed contact and moving contact, fixed contact is in the circuit breaker middle part, and an end is connected with silver contact, and the other end directly or indirectly is connected with side terminal; Moving contact directly or indirectly is connected with the opposite side binding post by being flexible coupling.Stationary contact is first long-armed below moving contact, upwards bending is a galianconism, galianconism and moving contact opposing parallel, this contact system was moving when the realization fixed contact was switched on contacting of moving contact, the sense of current unanimity that flows through on the fixed contact, therefore when the disjunction short circuit current, moving, there is the Ampere force that attracts each other between the fixed contact, play certain inhibition for the motion of moving contact, for the circuit breaker N utmost point, guaranteed to be later than the disjunction of the L utmost point, produced and extinguish arcs by the L utmost point when guaranteeing disjunction, the N utmost point just plays the effect of open circuit, the electric arc that produces during not disjunction short circuit, help the disjunction of whole circuit breaker like this, avoid the damage of electric arc for the N utmost point.
At the structure of the circuit breaker N utmost point, in conjunction with the accompanying drawings embodiment of the present utility model is described below.
The contact system primary structure that the utility model provides comprises fixed contact 1, moving contact 2, left side binding post 3 and right side binding post 4.Wherein:
Fixed contact 1 is in the middle part of circuit breaker, the L shaped lamellar body of fixed contact 1 for constituting by long-armed and galianconism, its long-armed below that is positioned at moving contact 2, its galianconism is folded to top and substantially parallel with moving contact 2, side towards moving contact on the galianconism of fixed contact is connected with silver contact, and the realization fixed contact contacts with moving contact.The long-armed far-end of fixed contact 1 is connected with left side binding post 3.Moving contact 2 is connected with right side binding post 4 by being flexible coupling.
As seen from Figure 1: during energising, the electric current I that dynamic and static contact flows through
1With I
2Direction is identical, is upwards.Therefore, when circuit breaker disjunction short circuit current, have the Ampere force that attracts each other between the dynamic and static contact, this motion for moving contact can be played certain inhibition.
Opening apart from less than the extremely dynamic and static clearance between open contacts of L of the extremely dynamic and static contact of N simultaneously, the excess of stroke of the extremely dynamic and static contact of N is greater than the extremely dynamic and static contact over travel of L.Therefore, fashionable when circuit breaker closing, the N utmost point is extremely closed prior to L; During disconnection, N extremely back disconnects in the L utmost point.When the circuit breaker disjunction, will directly produce electric arc at dynamic and static contact, and there is not the arc extinguishing ability in the N utmost point, but because N extremely disconnects in the L utmost point back, so electric arc will produce and extinguish in L the utmost point during disjunction, behind arc extinction, the extremely dynamic and static contact of N separates.The contact system of this " close afterwards earlier and divide " is very favourable for the disjunction of circuit breaker integral body, can guarantee to improve the breaking capacity of circuit breaker integral body under the situation that the N utmost point is not damaged.
Claims (2)
- One kind be used on small-sized isolating switch or small-sized isolator or the miniature circuit breaker not with the contact apparatus of the N utmost point of arc extinguishing ability, comprise moving contact, fixed contact and binding post, the first end of stationary contact is connected with the contact, and the other end directly or indirectly is connected with side terminal; Moving contact directly or indirectly is connected with the opposite side binding post by being flexible coupling, and it is characterized in that:The L shaped lamellar body of described fixed contact for constituting by long-armed and galianconism, its long-armed below that is positioned at moving contact, its galianconism is folded to top and substantially parallel with moving contact, and the sense of current during energising in the fixed contact galianconism is identical with the moving contact sense of current.
- 2. the contact apparatus that is used for the N utmost point as claimed in claim 1 is characterized in that:The side towards moving contact on the galianconism of described fixed contact is connected with the contact, and the long-armed far-end of fixed contact is connected with side terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202798916U CN201788917U (en) | 2010-08-02 | 2010-08-02 | Contact device for N pole incapable of extinguishing arc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202798916U CN201788917U (en) | 2010-08-02 | 2010-08-02 | Contact device for N pole incapable of extinguishing arc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201788917U true CN201788917U (en) | 2011-04-06 |
Family
ID=43820873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202798916U Expired - Lifetime CN201788917U (en) | 2010-08-02 | 2010-08-02 | Contact device for N pole incapable of extinguishing arc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201788917U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702485A (en) * | 2014-12-15 | 2016-06-22 | 西门子公司 | contact unit for electromechanical switching device |
| CN108447747A (en) * | 2018-05-16 | 2018-08-24 | 首瑞（天津）电气设备有限公司 | A kind of small size breaker |
-
2010
- 2010-08-02 CN CN2010202798916U patent/CN201788917U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702485A (en) * | 2014-12-15 | 2016-06-22 | 西门子公司 | contact unit for electromechanical switching device |
| US9754735B2 (en) | 2014-12-15 | 2017-09-05 | Siemens Aktiengesellschaft | Contact unit for an electromechanical switching device |
| CN108447747A (en) * | 2018-05-16 | 2018-08-24 | 首瑞（天津）电气设备有限公司 | A kind of small size breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Renmin Electric Appliance Factory Co., Ltd. Assignor: Beijing Cuixiang Electric Appliance Element Co., Ltd. Contract record no.: 2011990000798 Denomination of utility model: Contact device for N pole incapable of extinguishing arc Granted publication date: 20110406 License type: Exclusive License Record date: 20110819 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110406 |
|
| CX01 | Expiry of patent term |