CN203300582U - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN203300582U CN203300582U CN2013202743391U CN201320274339U CN203300582U CN 203300582 U CN203300582 U CN 203300582U CN 2013202743391 U CN2013202743391 U CN 2013202743391U CN 201320274339 U CN201320274339 U CN 201320274339U CN 203300582 U CN203300582 U CN 203300582U
- Authority
- CN
- China
- Prior art keywords
- contact
- moving contact
- circuit breaker
- blowout coil
- fixed contact
- 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 - Lifetime
Links
Images
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
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/446—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model provides a circuit breaker. During the drop-out process of the circuit breaker, the retention time of an arc on the silver joints of the movable contact and the static contact of the circuit breaker is shortened to relieve the burning loss of the arc on the silver joints, so that the electric operationality and the breaking capacity of the circuit breaker under the short-circuit or overload condition are improved. The circuit breaker comprises a first movable contact, a first static contact, a second movable contact, a second static contact, and a magnetic blow-out coil, wherein the first movable contact and the first static contact, and the second movable contact and the second static contact, are matched with each other correspondingly. The magnetic blow-out coil is connected in parallel with the second movable contact and the second static contact. The first movable contact is connected in series with and the second movable contact. The magnetic blow-out coil is positioned on the side surfaces of the first movable contact and the first static contact.
Description
Technical field
The utility model relates to circuit breaker, relates to especially the circuit breaker with blowout coil, relates more particularly to have the breaker of plastic casing of blowout coil.
Background technology
Breaker of plastic casing is for connection and breaking current and in the situation that overcurrent provides a kind of low-voltage electrical apparatus of protection to circuit and equipment.Electric life and short circuit breaking capacity are the important performance indexes of breaker of plastic casing, and generally, it all becomes positive correlation with the size of the dynamic and static contact silver contact of breaker of plastic casing.Yet due to the scarcity of silver, it is a kind of very expensive metal, although breaker of plastic casing is considerably less to the use amount of silver, silver has still occupied considerable cost ratio.Reduce the consumption of silver in breaker of plastic casing, keep simultaneously or the performance of improving breaker of plastic casing is very significant.
In each interrupting process of breaker of plastic casing, can be accompanied by the generation of electric arc and continue, this electric arc can make the continuous scaling loss of silver contact.The degree of silver contact scaling loss and electric arc stop on silver contact time has positive correlation.And the time of staying of electric arc on dynamic and static contact silver contact is relevant with the direction of its suffered electromagnetic force and electromagnetic force, strengthen and to make the blown off electromagnetic force of dynamic and static contact silver contact direction of electric arc, electric arc stops on silver contact time be can shorten, thereby the electric operating characteristics of breaker of plastic casing and the interrupting performance under short circuit or overload situations improved.
On the other hand, for dc circuit breaker, owing to there is no voltage zero-cross, the motion that relies on electric arc fully of extinguishing of its electric arc reaches and arc control device acting in conjunction lifting arc voltage, thereby makes fast arc extinction.The blown off silver contact of dynamic and static contact of electric arc also can be accelerated the process of arc extinction.
Fig. 1 shows the structure of breaker of plastic casing product of the prior art, two arc control device that it has two pairs of complete dynamic and static contacts and coordinates with it respectively, and this dynamic and static contact has respectively silver contact.Along with constantly riseing of noble metal price, the competitiveness of this product cost can constantly descend, and the breaker of plastic casing of this structure is as applying in direct current, and arc extinction performance need raising.
The utility model content
The purpose of this utility model is to provide a kind of circuit breaker, it has blowout coil, by this blowout coil, can strengthen and make the blown off electromagnetic force of dynamic and static contact silver contact direction of electric arc, in the circuit breaker interrupting process, shorten electric arc stops on the silver contact of the dynamic and static contact of circuit breaker time, reduce the scaling loss of electric arc to silver contact, thereby improve the electric operating characteristics of circuit breaker and the interrupting performance under short circuit or overload situations.
The technical solution of the utility model is: a kind of circuit breaker comprises the first moving contact and first fixed contact of corresponding matching; The second moving contact of corresponding matching and the second fixed contact; And blowout coil; Blowout coil is in parallel with the second moving contact and the second fixed contact, and the first moving contact and the second moving contact are connected in series; Blowout coil is positioned at the side of the first moving contact and the first fixed contact.
in parallel with blowout coil by the second moving contact and the second fixed contact, when the second moving contact and the second fixed contact separate, its resistance increases rapidly, causing the fundamental component of short circuit current to flow through to become from blowout coil between the second original moving contact and the second fixed contact flows through, thereby cause the electric current in blowout coil to increase rapidly, and produce large electromagnetic force, again because blowout coil is positioned at the side of the first moving contact and the first fixed contact, the electromagnetic force that blowout coil produces can be blown the electric arc between the first moving contact and the first fixed contact contact, this electric arc is elongated, shorten this electric arc moving, the time that stops on the silver contact of fixed contact, reach the purpose of fast arc extinction and the loss of minimizing silver contact.
Preferably, the first moving contact apart from the distance of the pivot of this first moving contact than the distance of the second moving contact apart from the pivot of this second moving contact.
It is the main dynamic and static contact that circuit breaker is realized cut-out function that this configuration makes the first moving contact and the first fixed contact.
Preferably, the second moving contact is arranged so that apart from the distance of the pivot of this second moving contact opening apart from meeting between the second moving contact and the second fixed contact between the second moving contact and the second fixed contact do not produce electric arc or produce minimum negligible electric arc.
Can, so that the first fixed contact and the first moving contact have the larger distance of opening when the off-state, be beneficial to the elongation of electric arc by above-mentioned setting.Do not produce electric arc between the second moving contact and the second fixed contact, perhaps produce minimum negligible electric arc, therefore need to arc control device be set at the second moving contact and the second fixed contact place, even need to silver contact be set at the second moving contact and the second fixed contact place, be conducive to reduce the production cost of circuit breaker.
Preferably an end of blowout coil is connected with the second moving contact, and the other end is connected with the second fixed contact.
Preferably blowout coil and the second fixed contact be threaded connection, welding or riveting, blowout coil is by soft connection and the welding of the second moving contact.
, by above-mentioned connected mode, make blowout coil in parallel with the second moving contact and the second fixed contact.
Preferably, this soft connection is the copper pigtail line.
Preferably, be provided with insulating material between blowout coil and the first fixed contact and the first moving contact.
Arrange that this insulating material makes in the situation that produce electric arc between the first fixed contact and the first moving contact, blowout coil can be by electrical arc erosion.
Preferably, this insulating material is for producing the plastics of gas.
Preferably, this blowout coil is with radial coiling or with the coiling of lamination shape order or with the sequentially mode coiling that combines of coiling of radial coiling and lamination shape.
Preferably, the sectional area of this blowout coil is set for when circuit breaker disjunction short circuit current, the heat that this blowout coil produces does not damage insulating material contacted with it, and blowout coil can not fused.
The sectional area of suitable blowout coil is set, can guarantees that blowout coil can not cause damage because of circuit breaker disjunction short circuit current in use.
Preferably, this circuit breaker is breaker of plastic casing.
The utility model is by the side at the first moving contact and the first fixed contact, one group of blowout coil is set, make the first moving contact and the first fixed contact produce in the process of breaking current the electric arc effect rapid movement because of the electromagnetic force that is subject to blowout coil and produces, thereby improved the ability of circuit breaker breaking arc.And, because second fixed contact in parallel with blowout coil and the second moving contact do not produce electric arc, or produce very little negligible electric arc, therefore at the second fixed contact and the second moving contact place, do not need silver contact and arc control device, reduced the cost of product.
Description of drawings
Other advantage of the present utility model and feature will become more obviously clear from ensuing that only with the purpose of non-limiting example, provide and explanation expression specific embodiment of the present utility model in the accompanying drawings, in the accompanying drawings:
Fig. 1 is the perspective view of breaker of plastic casing product of the prior art;
Fig. 2 is the line construction schematic diagram according to circuit breaker of the present utility model;
Fig. 3 connects the line construction schematic diagram of load and power supply according to circuit breaker of the present utility model;
Fig. 4 is the schematic diagram according to a kind of winding method of the blowout coil of circuit breaker of the present utility model;
Fig. 5 is the schematic diagram according to the another kind of winding method of the blowout coil of circuit breaker of the present utility model.
Description of reference numerals
1 circuit breaker
2 blowout coils
3 electric arcs
4 power supplys
5 loads
11 first moving contacts
12 first fixed contacts
21 second moving contacts
22 second fixed contacts
Embodiment
Below according to structure and the operation principle of Fig. 2 to Fig. 5 detailed description according to circuit breaker of the present utility model.
As shown in Figure 2,, according to circuit breaker 1 of the present utility model, comprise the first moving contact 11 and the first fixed contact 12, the second moving contacts 21 and the second fixed contact 22 and blowout coil 2; Blowout coil is in parallel with the second moving contact 21 and the second fixed contact 22, namely, one end of blowout coil 2 is connected with the second fixed contact 22, the other end is connected with the second moving contact 21, the first moving contact 11 and the second moving contact 21 are connected in series, and blowout coil 2 is positioned at the side of the first moving contact 11 and the first fixed contact 12 positions.
At this, one end of blowout coil 2 and the second fixed contact 22 can be threaded connection, welding or riveting, the other end of blowout coil, by soft connection and the second moving contact 21 welding,, in being flexible coupling for the copper pigtail line connects of this, can be also being flexible coupling of alternate manner.Certain above-mentioned connection all can be adopted other connected mode, as long as can realize the function of stable electrical connection.
the circuit that is connected by the second moving contact and the second fixed contact blowout coil in parallel, when the first fixed contact and the disconnection of the second fixed contact, due to when the circuit breaker disjunction, the electric current that increases rapidly in blowout coil, blowout coil can produce large electromagnetic force, again because blowout coil is positioned at the side of the first moving contact and the first fixed contact, the electromagnetic force that blowout coil produces can be blown the electric arc 3 between the first moving contact and the first fixed contact contact, shorten this electric arc 3 moving, the time that stops on the silver contact of fixed contact, reach the purpose of fast arc extinction and the loss of minimizing silver contact.
The first moving contact 11 apart from the distance of the pivot of this first moving contact 11 than the distance of the second moving contact 21 apart from the pivot of this second moving contact 21.As can be seen from Figure 2, opening apart from obviously greater than the distance of opening between the second moving contact 21 and the second fixed contact 22 between the first moving contact 11 and the first fixed contact 12.In the utility model, the first moving contact 11 and the first fixed contact 12 are main dynamic and static contacts that circuit breaker is used for disjunction place circuit.
When actual design, it is to make opening apart from meeting between the second moving contact 21 and the second fixed contact 22 between the second moving contact 21 and the second fixed contact 22 not produce electric arc or produce minimum negligible electric arc apart from the distance of the pivot of this second moving contact 21 that the second moving contact 21 is set.
Can, so that the first fixed contact and the first moving contact have the larger distance of opening when the off-state, be beneficial to the elongation of electric arc by above-mentioned setting.Do not produce electric arc between the second moving contact and the second fixed contact, perhaps produce minimum negligible electric arc, therefore need to arc control device be set at the second moving contact and the second fixed contact place, be conducive to reduce the production cost of circuit breaker.
Also be provided with insulating material between blowout coil 2 and the first fixed contact 12 and the first moving contact 11, namely also be provided with insulating material between blowout coil 2 and the first fixed contact 12 as a whole and the first moving contact 11.This insulating material makes in the situation that produce electric arc between the first fixed contact 12 and the first moving contact 11, and blowout coil 2 can be by electrical arc erosion.This insulating material is the plastics that can produce gas.
Fig. 3 shows the line construction schematic diagram that connects load and power supply according to circuit breaker of the present utility model, and in the present embodiment, power supply and the second fixed contact 22 directly are connected in series, and load and the first fixed contact 12 directly are connected in series.According to circuit theory of the present utility model, power supply and the first fixed contact 12 directly are connected in series, and load and the second fixed contact 22 directly are connected in series also and are fine, and also can realize function of the present utility model.
Fig. 4 and Fig. 5 show respectively two kinds of winding methods according to the blowout coil 2 of circuit breaker 1 of the present utility model.
As shown in Figure 4, this blowout coil 2 is with radial coiling.
As shown in Figure 5, this blowout coil 2 is with the coiling of lamination shape order, and Fig. 5 shows respectively front view and the end view of this kind winding method.
As required, blowout coil 2 also can adopt the mode coiling that combines with the coiling of lamination shape order with radial coiling, and is not shown at this.
When the concrete structure of design blowout coil, the sectional area of this blowout coil is set for when circuit breaker disjunction short circuit current, the heat that this blowout coil produces does not damage insulating material contacted with it, and blowout coil can not fused.The sectional area of suitable blowout coil is set, can guarantees that blowout coil can not cause damage because of circuit breaker disjunction short circuit current in use.
Can be breaker of plastic casing according to circuit breaker of the present utility model, but being not limited to breaker of plastic casing, can be also the circuit breaker of other type, namely, the utility model is not limited to increase blowout coil on existing breaker of plastic casing, also can increase blowout coil on the circuit breaker of other type.
As follows according to the operation principle of circuit breaker of the present utility model:
1. in the situation that the disjunction normal current: when breaker closing, the first moving contact contacts with the first fixed contact, and the second moving contact contacts with the second fixed contact, thereby form from the power supply to the circuit breaker load, returns the current circuit of power supply.In circuit breaker, electric current flow to the first moving contact and the first fixed contact from the second fixed contact by the second moving contact.And blowout coil is in parallel with the circuit at the second fixed contact place with the second moving contact, the size of current of this blowout coil of flowing through and the contact resistance positive correlation of the second fixed contact and the second moving contact, namely under the breaker closing state, the electric current of this blowout coil of flowing through is very little.When circuit breaker cut-offs, because the second moving contact and the second fixed contact separate, increase rapidly the contact resistance of the second fixed contact and the second moving contact, thereby the electric current of this blowout coil of flowing through increases rapidly, prevented so on the one hand the generation of electric arc between the second fixed contact and the second moving contact, the powerful magnetic field that is produced by curent change in this blowout coil on the other hand makes the electric arc that just results between the first moving contact and the first fixed contact rapidly away from silver contact, has reduced the scaling loss of silver contact and has realized the disjunction of electric current.
2. in the situation that the disjunction short circuit current: when normal, the first moving contact contacts with the first fixed contact when breaker closing and electric current, and the second moving contact contacts with the second fixed contact, thereby form from the power supply to the circuit breaker load, returns the current circuit of power supply.In circuit breaker, electric current flow to the first moving contact and the first fixed contact from the second fixed contact by the second moving contact.And blowout coil is in parallel with the circuit at the second fixed contact place with the second moving contact, the size of current of this blowout coil of flowing through and the contact resistance positive correlation of the second fixed contact and the second moving contact, namely under the breaker closing state, the electric current of this blowout coil of flowing through is very little.when short circuit current occurs, because the first moving contact and the first fixed contact and the second moving contact separate rapidly with the effect of the second fixed contact due to electrodynamic repulsion force, thereby increase rapidly the contact resistance between the second moving contact and the second fixed contact, the electric current of blowout coil of flowing through like this increases to rapidly short circuit current, if make so on the one hand in the situation that produce electric arc between the second fixed contact and the second moving contact, electric arc between the second fixed contact and the second moving contact extinguishes rapidly, the powerful magnetic field that is produced by curent change in this blowout coil on the other hand makes the electric arc that just results between the first moving contact and the first fixed contact rapidly away from silver contact, reduce the scaling loss of silver contact and realized the disjunction of electric current.
The utility model is by the side of the first moving contact and the first fixed contact at circuit breaker, one group of blowout coil is set, make the first moving contact and the first fixed contact produce in the process of breaking current the electric arc effect rapid movement because of the electromagnetic force that is subject to blowout coil and produces, thereby improved the ability of circuit breaker breaking arc.And, because second fixed contact in parallel with blowout coil and the second moving contact do not produce electric arc, or produce very little negligible electric arc, therefore at the second fixed contact and the second moving contact place, do not need silver contact and arc control device, reduced the cost of product.
Above the utility model is described in detail; for one of ordinary skill in the art; thought according to the utility model embodiment; change in specific embodiments and applications should not thought the scope that has departed from the utility model protection; in sum, this description should not be construed as restriction of the present utility model.
Claims (10)
1. a circuit breaker (1), comprise the first moving contact (11) and first fixed contact (12) of corresponding matching; Second moving contact (21) of corresponding matching and the second fixed contact (22); It is characterized in that: also comprise blowout coil (2); Described blowout coil (2) is in parallel with described the second moving contact (21) and described the second fixed contact (22), and described the first moving contact (11) is connected in series with described the second moving contact (21); Described blowout coil (2) is positioned at the side of described the first moving contact (21) and described the first fixed contact (22).
2. circuit breaker according to claim 1 (1) is characterized in that: described the first moving contact (11) apart from the distance of the pivot of this first moving contact than the distance of described the second moving contact (21) apart from the pivot of this second moving contact.
3. circuit breaker according to claim 1 (1) is characterized in that: described the second moving contact (21) is arranged so that apart from the distance of the pivot of this second moving contact opening apart from meeting between the second moving contact and the second fixed contact between described the second moving contact (21) and described the second fixed contact (22) do not produce electric arc or produce minimum negligible electric arc.
4. circuit breaker according to claim 1 (1), it is characterized in that: an end of described blowout coil (2) is connected with described the second moving contact (21), and the other end is connected with described the second fixed contact (22).
5. circuit breaker according to claim 4 (1), it is characterized in that: described blowout coil (2) and described the second fixed contact (22) are threaded connection, welding or riveting, and described blowout coil (2) welds by soft connection and described the second moving contact (21).
6. circuit breaker according to claim 1 (1), is characterized in that: be provided with insulating material between described blowout coil (2) and described the first moving contact (11) and described the first fixed contact (12).
7. circuit breaker according to claim 6 (1) is characterized in that: this insulating material is for producing the plastics of gas.
8. circuit breaker according to claim 1 (1) is characterized in that: described blowout coil (2) is with radial coiling or with the order coiling of lamination shape or with the sequentially mode coiling that combines of coiling of radial coiling and lamination shape.
9. circuit breaker according to claim 8 (1), it is characterized in that: the sectional area of described blowout coil (2) is set for when circuit breaker disjunction short circuit current, the heat that described blowout coil (2) produces does not damage insulating material contacted with it, and described blowout coil (2) can not fused.
10. the described circuit breaker of any one (1) according to claim 1 to 9, it is characterized in that: described circuit breaker is breaker of plastic casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202743391U CN203300582U (en) | 2013-05-20 | 2013-05-20 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202743391U CN203300582U (en) | 2013-05-20 | 2013-05-20 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203300582U true CN203300582U (en) | 2013-11-20 |
Family
ID=49576576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202743391U Expired - Lifetime CN203300582U (en) | 2013-05-20 | 2013-05-20 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203300582U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167340A (en) * | 2013-05-20 | 2014-11-26 | 施耐德电器工业公司 | Circuit breaker |
| GB2531349A (en) * | 2014-10-17 | 2016-04-20 | Hawker Siddeley Switchgear Ltd | Circuit breaker with coil for arc displacement |
-
2013
- 2013-05-20 CN CN2013202743391U patent/CN203300582U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167340A (en) * | 2013-05-20 | 2014-11-26 | 施耐德电器工业公司 | Circuit breaker |
| GB2531349A (en) * | 2014-10-17 | 2016-04-20 | Hawker Siddeley Switchgear Ltd | Circuit breaker with coil for arc displacement |
| WO2016059430A1 (en) * | 2014-10-17 | 2016-04-21 | Hawker Siddeley Switchgear Limited | Circuit breaker with coil for arc displacement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102034619B (en) | Permanent magnet mechanism automatic changeover switch | |
| CN205911269U (en) | Circuit breaker | |
| CN203481122U (en) | Rapid vacuum switch and power grid system | |
| CN103971955B (en) | The contact assembly of parallel connection switching switch | |
| CN106098485A (en) | Circuit breaker | |
| CN106098477A (en) | A kind of high-voltage DC contactor of band magnetic coil arc extinguishing | |
| CN203300582U (en) | Circuit breaker | |
| CN104167340B (en) | Circuit breaker | |
| CN104715980A (en) | Magnetic reserved tripping protection mechanism | |
| CN103871796A (en) | Magnetism enhancement and arc guide device of miniature circuit breaker and miniature circuit breaker provided with magnetism enhancement and arc guide device | |
| CN204809158U (en) | Bridge type double break point DC electromagnetic contactor | |
| CN107706055B (en) | High-voltage relay resistant to instantaneous large current impact | |
| CN202332741U (en) | Sliding contact structure realizing automatic adjustment on pressure of contact for low-pressure contactor | |
| CN203826320U (en) | Magnetism-increasing and arc-guiding apparatus of miniature circuit breaker and miniature circuit breaker with magnetism-increasing and arc-guiding apparatus | |
| CN205723423U (en) | A kind of Mobile vacuum load switch and fuse combined electric apparatus | |
| CN201698919U (en) | Novel tap changer | |
| CN204303728U (en) | A kind of miniature circuit breaker with high throughflow lightning current ability | |
| CN212113572U (en) | Shielding arc-extinguishing device of contactor contact | |
| CN203103210U (en) | Vacuum arc extinguishing chamber and vacuum circuit breaker using same | |
| CN102915894B (en) | Arc-blowing device of direct-current circuit breaker | |
| CN202871727U (en) | Arc blow-out apparatus of direct-current breaker | |
| CN204045531U (en) | A kind of energy-saving miniature circuit breaker | |
| CN104124102A (en) | Novel alternating-current high-voltage vacuum circuit breaker for electrified railway | |
| CN201725752U (en) | Double break contact mechanism of low-voltage circuit breaker | |
| CN207200252U (en) | A kind of high reliability high-speed switch type fault current limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |