CN203118883U - Instant trip structure for molded case circuit breaker - Google Patents
Instant trip structure for molded case circuit breaker Download PDFInfo
- Publication number
- CN203118883U CN203118883U CN2012207420043U CN201220742004U CN203118883U CN 203118883 U CN203118883 U CN 203118883U CN 2012207420043 U CN2012207420043 U CN 2012207420043U CN 201220742004 U CN201220742004 U CN 201220742004U CN 203118883 U CN203118883 U CN 203118883U
- Authority
- CN
- China
- Prior art keywords
- armature
- mentioned
- spring
- electromagnet
- circuit breaker
- 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
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/503—Means for increasing the opening stroke of the contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
- H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/1009—Interconnected mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2463—Electromagnetic mechanisms with plunger type armatures
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
An object of the utility model is to provide an instant trip structure for a molded case circuit breaker, and the instant trip structure is capable of adjusting an original state maintaining force of an armature spring so as to fine-tune the trip sensitivity. The instant trip structure comprises an electromagnet which provides an electromagnetic attractive force while being magnetized; an armature which is rotated by the electromagnetic attractive force of the electromagnet; an armature support pin which can rotatably support the armature and runs through the armature; an armature spring which is arranged on the armature support pin and provides an elastic moment for the armature, such that the armature can rotate in a direction away from the electromagnet by one end of the armature spring; and an armature support plate which has a plurality of spring support grooves for supporting the other end of the armature spring so as to adjust the trip sensitivity. The beneficial effects of the instant trip structure are that, the original state maintaining force of the armature spring can be adjusted, and the trip sensitivity can be fine-tuned.
Description
Technical field
The utility model relates to molded case circuit breaker, and opening and closing structure moment of triggering (trigger) molded case circuit breaker when relating in particular to the big fault current on the circuit such as the electric current that is short-circuited in molded case circuit breaker moves to the instantaneous trip structure of cut-out (automatic shutdown circuit) position.
Background technology
Instantaneous trip structure for the molded case circuit breaker of prior art describes below in conjunction with Fig. 1 and Fig. 2.
The load electric circuit of the external power source that above-mentioned electromagnet is electrically connected with terminal by electric wire and molded case circuit breaker is electrically connected, when reaching the fault current of the several times of rated current and even tens of times with the electric current that is short-circuited at above-mentioned power circuit etc., be magnetized (magnetizing) and attraction is provided.Such electromagnet can comprise iron core (core) and be wound in iron core on every side and be electrically connected on the coil (coil) of above-mentioned power circuit.
The electromagnetic attraction rotation of above-mentioned electromagnet is established and passed through to armature 1 with respect to above-mentioned electromagnet, rotatably be supported in armature supporting bracket 2 by armature supporting pin 4.Respectively possesses a pin-and-hole (pin hole) in the central both sides of armature 1 so that armature supporting pin 4 connects insertion.
Each is formed above-mentioned a pair of central portion by the electric wire (wire) that repeatedly twines.
The a pair of shank 3a of going up upwards prolongs from above-mentioned central portion and forms and supported by 2 contacts of armature supporting bracket.
Above-mentioned a pair of down shank (not shown) prolongs downwards and contact with armature 1 from above-mentioned central portion, with elasticity pressurization armature 1, thereby rotates to the direction away from above-mentioned electromagnet.
In addition, armature supporting bracket 2 possesses the last shank 3a that supports armature spring 3 is established on the top that is formed at above-mentioned both sides board with folder spring support slot part 2a.
In Fig. 1 or Fig. 2, Reference numeral 5 expressions are electrically connected on the terminal that is electrically connected on molded case circuit breaker by electric wire by the power circuit between load, with bending when overcurrent takes place above-mentioned power circuit, the bimetallic plates (bimetalplate) of the cross bar of the above-mentioned opening and closing structure of pressurization rotation; Reference numeral 5a represents to be attached to the upper end of bimetallic plates 5 with the pressurization protuberance of the cross bar of the above-mentioned opening and closing structure that pressurizes; The above-mentioned terminal of Reference numeral 6 expressions; Reference numeral 6a represents to comprise the electric conductor part that forms or form separately and be electrically connected as at terminal 6 one body extensions, make bimetallic plates 5 and armature supporting bracket 2 be connected the vertical wall portion that supports by rivet, and be fixedly supported to the supporting walls portion of lower horizontal wall portion on the lower case ground of molded case circuit breaker.In Fig. 1, Reference numeral 7 is illustrated in above-mentioned vertical wall portion and connects the rivet that supports bimetallic plates 5 and armature supporting bracket 2.
Below, the effect of instantaneous trip structure of molded case circuit breaker of the prior art of said structure is described.
The above-mentioned power circuit that is electrically connected at the terminal 6 by molding outer casing flows through normal rated current, then above-mentioned electromagnet overcomes the elastic force of armature spring 3, and electromagnet is not magnetized and is the degree that the oneself attracts, and therefore, armature 1 does not draw rotation to above-mentioned electromagnet one side draught.Therefore, the cross bar pressurization part 1a of armature 1 also stops, and above-mentioned cross bar does not rotate, and therefore, the opening and closing structure of molded case circuit breaker is kept restrained state.
In addition, the above-mentioned power circuit that is electrically connected at the terminal 6 by the molding outer casing big fault currents such as electric current that are short-circuited, then above-mentioned electromagnet magnetization is the degree of the elastic force that overcomes armature spring 3, so that armature 1 draws rotation to above-mentioned electromagnet one side draught.Therefore, by the above-mentioned cross bar of cross bar pressurization part 1a rotation pressurization rotation of armature 1, thereby make the opening and closing structure of molded case circuit breaker be in release condition, finish cut-out (automatic shutdown circuit) action.
But, in the instantaneous trip structure of molded case circuit breaker of the prior art that possesses said structure and operation, because the initial condition maintenance energy of armature 1 from the armature spring 3 of electromagnet separation immobilized, therefore, the cut-out sensitivity of the initial condition maintenance energy of armature spring 3 can not be finely tuned.
The utility model content
The purpose of this utility model is to provide a kind of initial condition maintenance energy of adjustable economize on electricity pivot spring to cut off the instantaneous trip structure of the molded case circuit breaker of sensitivity with fine setting.
The utility model above-mentioned purpose will reach by the preferred embodiment that possesses following structure.For solving the problems of the technologies described above, the utility model provides following technical pattern.
The instantaneous trip structure of molded case circuit breaker of the present utility model comprises: electromagnet provides electromagnetic attraction when being magnetized (MAGNETIZING); Armature (ARMATURE) is by the electromagnetic attraction rotation of above-mentioned electromagnet; The armature supporting pin rotatably supports above-mentioned armature and connects above-mentioned armature and establish; The armature spring is arranged at above-mentioned armature supporting pin and provides moment of elasticity (MOMENT) to above-mentioned armature, to rotate to the direction away from above-mentioned electromagnet by an end; And the armature supporting bracket, a plurality of springs that possess the other end of supporting above-mentioned armature spring support slot part and cut off sensitivity to regulate.
As preferably, above-mentioned a plurality of springs support slot parts and have nothing in common with each other to the distance of the central portion of above-mentioned armature spring.The instantaneous trip structure of the molded case circuit breaker of invention, have nothing in common with each other and supports the armature supporting bracket of a plurality of springs support slot parts of the other end of armature spring because comprising to possess from the distance of the central portion of armature spring, cut off sensitivity to regulate, therefore, can support the end of change support armature spring in the slot part at a plurality of springs, thereby regulate the initial condition maintenance energy of armature spring easily, sensitivity is cut off in fine setting.In the instantaneous trip structure of molded case circuit breaker of the present utility model, more support the end of armature spring in the short spring support portion of the distance of the central portion that arrives the armature spring, the moment of elasticity away from the armature direction from the armature spring becomes big, and, because needing the bigger attraction of electromagnet, cut off the sensitivity rust, and more in the end of supporting the armature spring to the spring support portion of the distance of the central portion of armature spring, the moment of elasticity away from the armature direction from the armature spring diminishes, and, because needing the littler attraction of electromagnet, cut off sensitivity and become sensitive.
As preferably, in the instantaneous trip structure of molded case circuit breaker of the present utility model, above-mentioned armature supporting bracket also comprises: slot part, rotatably support above-mentioned armature supporting pin; And brake portion, limit above-mentioned armature to the rotation away from the direction of above-mentioned electromagnet.
The beneficial effect that the instantaneous trip structure of molded case circuit breaker of the present utility model compared with prior art has is that the initial condition maintenance energy of adjustable economize on electricity pivot spring cuts off sensitivity with fine setting.
Description of drawings
Fig. 1 is the structural representation of instantaneous trip structure of the molded case circuit breaker of prior art;
Fig. 2 is the pith enlarged drawing of Fig. 1;
Fig. 3 is the assembled state schematic diagram of instantaneous trip structure of the molded case circuit breaker of preferred embodiment of the present utility model;
Fig. 4 is armature in the instantaneous trip structure of molded case circuit breaker of preferred embodiment of the present utility model and the assembled state schematic diagram of armature spring;
Fig. 5 is armature supporting bracket in the instantaneous trip structure of molded case circuit breaker of preferred embodiment of the present utility model and the assembled state schematic diagram of bimetallic plates and terminal;
Fig. 6 is the armature supporting bracket schematic diagram in the instantaneous trip structure of molded case circuit breaker of preferred embodiment of the present utility model;
Fig. 7 to Figure 11 is the assembling process schematic diagram of instantaneous trip structure of the molded case circuit breaker of preferred embodiment of the present utility model;
Fig. 7 is the assembling process decomposing schematic representation of armature and armature spring and armature supporting pin;
Fig. 8 is the schematic diagram of the assembly of armature supporting bracket and bimetallic plates and terminal;
Fig. 9 supports the process assembled state schematic diagram of slot part for the spring of the end clips of armature spring being located at the armature supporting bracket;
Figure 10 is the view of assembly of instantaneous trip structure of molded case circuit breaker of finishing the preferred embodiment of the present utility model of assembling;
Figure 11 finishes pith enlarged diagram in the instantaneous trip structure of molded case circuit breaker of preferred embodiment of the present utility model of assembling process.
Embodiment
Above-mentioned the purpose of this utility model and the structure of the present utility model and the effect thereof that achieve the above object will become more clear with the following explanation of carrying out in conjunction with the drawings to preferred embodiment of the present utility model.
Fig. 3 is the assembled state schematic diagram of instantaneous trip structure of the molded case circuit breaker of preferred embodiment of the present utility model; Fig. 4 is armature in the instantaneous trip structure of molded case circuit breaker of preferred embodiment of the present utility model and the assembled state schematic diagram of armature spring; Fig. 5 is armature supporting bracket in the instantaneous trip structure of molded case circuit breaker of preferred embodiment of the present utility model and the assembled state schematic diagram of bimetallic plates and terminal; Fig. 6 is the armature supporting bracket schematic diagram in the instantaneous trip structure of molded case circuit breaker of preferred embodiment of the present utility model.
In addition, Fig. 7 to Figure 10 is the assembling process schematic diagram of instantaneous trip structure of the molded case circuit breaker of preferred embodiment of the present utility model; Fig. 7 is the assembling process decomposing schematic representation of armature and armature spring and armature supporting pin; Fig. 8 is the schematic diagram of the assembly of armature supporting bracket and bimetallic plates and terminal; Fig. 9 supports the process assembled state schematic diagram of slot part for the spring of the end clips of armature spring being located at the armature supporting bracket; Figure 10 is the view of assembly of instantaneous trip structure of molded case circuit breaker of finishing the preferred embodiment of the present utility model of assembling.
In addition, Figure 11 finishes pith enlarged diagram in the instantaneous trip structure of molded case circuit breaker of preferred embodiment of the present utility model of assembling process.
To shown in Figure 11, the structure of instantaneous trip structure of the molded case circuit breaker of preferred embodiment of the present utility model is described as Fig. 3.
The instantaneous trip structure 100-1 of the molded case circuit breaker of preferred embodiment of the present utility model comprises electromagnet (not shown), armature 1, armature supporting pin 4, armature spring 3 and armature supporting bracket 2.
The load electric circuit of the external power source that electromagnet is electrically connected with terminal 6 by electric wire and molded case circuit breaker is electrically connected, when reaching the fault current of the several times of rated current and even tens of times with the electric current that is short-circuited at above-mentioned power circuit etc., be magnetized (magnetizing) and attraction is provided.Such electromagnet can comprise iron core (core) and be wound in iron core on every side and be electrically connected on the coil (coil) of above-mentioned power circuit.
The electromagnetic attraction rotation of above-mentioned electromagnet is established and passed through to armature 1 with respect to above-mentioned electromagnet, rotatably be supported in armature supporting bracket 2 by armature supporting pin 4.Respectively possess a pin-and-hole (pin hole) in the central both sides of armature 1 and connect insertion for armature supporting pin 4.
As shown in Figure 7, armature spring 3 is made of dual torsion spring and comprises a pair of central portion 3b, a pair of shank (upper leg portion) 3a and a pair of shank (the lower leg portion) 3c down of going up.
Each is formed a pair of central portion 3b by the electric wire (wire) that repeatedly twines and is supported by armature supporting pin 4.
The a pair of shank 3a of going up upwards prolongs from above-mentioned two central portion 3b and forms and supported by 2 contacts of armature supporting bracket.The a pair of shank 3a that goes up also possesses in the end for articulating and is supported in the hook end segment 3a-1 that armature supporting bracket 2 is bent to form with hook shape.
Above-mentioned a pair of down shank 3c prolongs downwards and contact with armature 1 from a pair of central portion 3b, and provides moment of elasticity (MOMENT) to rotate to the direction away from electromagnet to armature 1.
In addition, armature supporting bracket 2 possesses the last shank 3a that supports armature spring 3 is established on the top that is formed at above-mentioned both sides board with folder a plurality of springs support slot part 2a-1.As shown in figure 11, above-mentioned a plurality of spring support slot part 2a-1 comprises that first spring supports slot part 2a-1-1, second spring supports slot part 2a-1-2 and the 3rd spring supports slot part 2a-1-3.
For sensitivity is cut off in fine setting, a plurality of springs support slot part 2a-1, three springs among the embodiment support slot part 2a-1, namely first spring supports slot part 2a-1-1, second spring supports slot part 2a-1-2 and the 3rd spring support slot part 2a-1-3 is different mutually to distance L 3, L2, the L1 of the central authorities of armature spring 3, and at this, L3 is shorter than L2, and L2 is shorter than L1.
Support among the slot part 2a-1 at three springs, more support slot part at the short spring of the distance of the central portion 3b that arrives armature spring 3, namely first spring supports the hook end segment 3a-1 that supports among the slot part 2a-1-1 as the end of the last shank 3a in the armature spring 3, armature 1 becomes big from the moment of elasticity to away from the direction of electromagnet that armature spring 3 is subjected to, therefore, because needing the bigger attraction of electromagnet, cut off the sensitivity rust.
Support among the slot part 2a-1 at three springs, more support slot part at the distance of the central portion 3b that arrives armature spring 3 spring far away, namely the 3rd spring supports the hook end segment 3a-1 that supports among the slot part 2a-1-3 as the end of the last shank 3a in the armature spring 3, armature 3 diminishes from the moment of elasticity to away from the direction of electromagnet that armature spring 3 is subjected to, therefore, because needing the littler attraction of electromagnet, cut off sensitivity and become sensitive.
In addition, as shown in Figure 6, armature supporting bracket 2 comprises that also restriction armature 1 is to brake (STOPPER) 2c of portion away from the rotation of the direction of electromagnet.
As described in the background technology, Reference numeral 5 expressions are electrically connected on the terminal that is electrically connected on molded case circuit breaker by electric wire by the power circuit between load, with bending when overcurrent takes place above-mentioned power circuit, the bimetallic plates of the cross bar of the above-mentioned opening and closing structure of pressurization rotation; Reference numeral 5a represents to be attached to the upper end of bimetallic plates 5 with the pressurization protuberance of the cross bar of the above-mentioned opening and closing structure that pressurizes; The above-mentioned terminal of Reference numeral 6 expressions; Reference numeral 6a represents to comprise the electric conductor part that forms or form separately and be electrically connected as at terminal 6 one body extensions, make bimetallic plates 5 and armature supporting bracket 2 be connected the vertical wall portion that supports by rivet, and be fixedly supported to the supporting walls portion of lower horizontal wall portion on the lower case ground of molded case circuit breaker.Reference numeral 7 is illustrated in above-mentioned vertical wall portion and connects the rivet that supports bimetallic plates 5 and armature supporting bracket 2.
Below, the effect of the instantaneous trip structure of the molded case circuit breaker of the preferred embodiment of the present utility model of accompanying drawings said structure.
The above-mentioned power circuit that is electrically connected at the terminal 6 by molding outer casing flows through normal rated current, and then electromagnet overcomes the elastic force of armature spring 3, and electromagnet is not magnetized and is the degree that the oneself attracts, and therefore, armature 1 does not draw rotation to electromagnet one side draught.Therefore, the cross bar pressurization part 1a of armature 1 also stops, and above-mentioned cross bar does not rotate, and therefore, the opening and closing structure of molded case circuit breaker is kept restrained state.
In addition, the above-mentioned power circuit that is electrically connected at the terminal 6 by the molding outer casing big fault currents such as electric current that are short-circuited, then the electromagnet magnetization is the degree of the elastic force that overcomes armature spring 3, so that armature 1 draws rotation to electromagnet one side draught.
At this moment, support among the slot part 2a-1 at three springs, more support slot part at the short spring of the distance of the central portion 3b that arrives armature spring 3, namely second spring supports the hook end segment 3a-1 that supports among slot part 2a-1-2 or first spring support slot part 2a-1-1 as the end of the last shank 3a in the armature spring 3, armature 1 becomes big from the moment of elasticity to away from the direction of electromagnet that armature spring 3 is subjected to, therefore, because needing the bigger attraction of electromagnet, cut off the sensitivity rust.
Support among the slot part 2a-1 at three springs, more support slot part at the distance of the central portion 3b that arrives armature spring 3 spring far away, namely the 3rd spring supports the hook end segment 3a-1 that supports among the slot part 2a-1-3 as the end of the last shank 3a in the armature spring 3, armature 3 diminishes from the moment of elasticity to away from the direction of electromagnet that armature spring 3 is subjected to, therefore, because needing the littler attraction of electromagnet, cut off sensitivity and become sensitive.
Claims (3)
1. the instantaneous trip structure of a molded case circuit breaker is characterized in that comprising:
Electromagnet provides electromagnetic attraction when being magnetized;
Armature is by the electromagnetic attraction rotation of above-mentioned electromagnet;
The armature supporting pin rotatably supports above-mentioned armature and connects above-mentioned armature and establish;
The armature spring is arranged at above-mentioned armature supporting pin and provides moment of elasticity to above-mentioned armature, to rotate to the direction away from above-mentioned electromagnet by an end; And
The armature supporting bracket, a plurality of springs that possess the other end of supporting above-mentioned armature spring support slot part and cut off sensitivity to regulate.
2. the instantaneous trip structure of molded case circuit breaker according to claim 1 is characterized in that: above-mentioned a plurality of springs support slot parts and have nothing in common with each other to the distance of the central portion of above-mentioned armature spring.
3. the instantaneous trip structure of molded case circuit breaker according to claim 1 is characterized in that:
Above-mentioned armature supporting bracket also comprises:
Slot part rotatably supports above-mentioned armature supporting pin; And
Brake portion limits above-mentioned armature to the rotation away from the direction of above-mentioned electromagnet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2011-0011800 | 2011-12-30 | ||
| KR2020110011800U KR200477250Y1 (en) | 2011-12-30 | 2011-12-30 | Instant trip mechanism for molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203118883U true CN203118883U (en) | 2013-08-07 |
Family
ID=48899205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207420043U Expired - Lifetime CN203118883U (en) | 2011-12-30 | 2012-12-28 | Instant trip structure for molded case circuit breaker |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR200477250Y1 (en) |
| CN (1) | CN203118883U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359066A (en) * | 2017-08-23 | 2017-11-17 | 河北宝凯电气股份有限公司 | A kind of breaker jaw type arc-control device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102053166B1 (en) * | 2015-03-31 | 2019-12-06 | 현대일렉트릭앤에너지시스템(주) | Molded case circuit breaker |
| JP2023091166A (en) * | 2021-12-20 | 2023-06-30 | パナソニックホールディングス株式会社 | Electromagnetic trip device, circuit breaker, and distribution board |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200393291Y1 (en) * | 2005-05-14 | 2005-08-22 | 엘에스산전 주식회사 | A trip mechanism for molded cased circuit breaker |
| JP4313383B2 (en) * | 2006-09-04 | 2009-08-12 | エルエス産電株式会社 | Instantaneous trip mechanism for circuit breaker for wiring |
| KR100928936B1 (en) * | 2007-12-27 | 2009-11-30 | 엘에스산전 주식회사 | Instantaneous tripping mechanism of wiring breaker |
-
2011
- 2011-12-30 KR KR2020110011800U patent/KR200477250Y1/en active IP Right Grant
-
2012
- 2012-12-28 CN CN2012207420043U patent/CN203118883U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359066A (en) * | 2017-08-23 | 2017-11-17 | 河北宝凯电气股份有限公司 | A kind of breaker jaw type arc-control device |
| CN107359066B (en) * | 2017-08-23 | 2019-12-17 | 河北宝凯电气股份有限公司 | Clamp type arc extinguishing device for circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130004246U (en) | 2013-07-10 |
| KR200477250Y1 (en) | 2015-05-22 |
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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: 20130807 |