CN101447371B - Circuit breaker capable of displaying on-off state of moving and static contacts - Google Patents
Circuit breaker capable of displaying on-off state of moving and static contacts Download PDFInfo
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- CN101447371B CN101447371B CN2007101684554A CN200710168455A CN101447371B CN 101447371 B CN101447371 B CN 101447371B CN 2007101684554 A CN2007101684554 A CN 2007101684554A CN 200710168455 A CN200710168455 A CN 200710168455A CN 101447371 B CN101447371 B CN 101447371B
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- circuit breaker
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Abstract
The invention relates to a circuit breaker capable of displaying on-off state of moving and static contacts, which comprises an action mechanism, an arc-extinguishing mechanism and an overcurrent protection mechanism, wherein, the circuit breaker further comprises a phase line access end and a phase line output end for being accessed into a power line; a box body, the various component parts are arranged in the box body, a user can clearly see position relationship of the moving and the static contacts through a window or a transparent material on the box body, and fluorescent coatings are arranged on the moving contact and the static contact; the circuit breaker further comprises a lighting circuit which is provided with a lighting lamp to be arranged in the box body and be corresponding to the position of the static contact, when a handle is in off position, the lighting lamp is lighted; and a second indicating lamp circuit which comprises a second indicating lamp to be connected with the phase line access end and a zero line, and the second indicating lamp is lighted when in power outage.
Description
Technical field
What the present invention relates to is a kind of circuit breaker, a kind of circuit breaker that can see dynamic and static contact position relation in the break-make situation clearly particularly.
Background technology
Switch switchgear for power department is that Electrical Safety, circuit switch imperative equipment, can be communicated with exactly or open circuit for its mission of circuit breaker usually; As long as there is an actuating mechanism just can realize in general sense for this reason; But from the angle of safety, existing circuit breaker has also increased some non-essential accessory structures, like an arc-extinguishing mechanism, an overcurrent protection machine; Its internal structure of existing circuit breaker sees also shown in Figure 1 so; It comprises: a box body 001, and adopt the insulation fire proofing to make, portion is provided with following structure within it:
An one live wire incoming end 032 and a live wire output 037 are in order to be linked in the power line subscribers feeder; One actuating mechanism, it comprises: one handle 021, it has an operating side and is arranged at outside the described box body 001, carries out the break-make control of circuit; One movable contact spring 024, its end have a moving contact 025; One interlock controll block group 022; It is made up of a plurality of STATEMENT OF FEDERALLY SPONSORED; Axle through being arranged in the said box body 001 rotates, and an end of its STATEMENT OF FEDERALLY SPONSORED that goes up most 0221 is connected with described handle 021, and the end of bottom STATEMENT OF FEDERALLY SPONSORED 0222 is connected with the front end of described movable contact spring 023; One fixed contact 031; It is connected with described live wire input 032, when the described interlock controll block group 022 of turn handle 021 pulling, thereby causes seesawing of movable contact spring 024; The contact that realizes moving contact 025 and fixed contact 031 with separate, finally reach the purpose of subscriber's line break-make.It also comprises: an arc-extinguishing mechanism, an overcurrent protection mechanism and a circuit board 036, and described arc-extinguishing mechanism is in order to eliminate the destruction of electric arc to circuit breaker, and it comprises that a metal is when an arc plate 034 and an arc-extinguish chamber 035; Described metal arc extinguishing board 033 is connected with described fixed contact 031 and extends to described box body 001 bottom; Described arc-extinguish chamber 035 is corresponding with described fixed contact 031, and described overcurrent protection mechanism is a magnetictrip 051, is arranged at described actuating mechanism bottom; The one of which end is connected with described movable contact spring upper end 023; Its other end is connected with an end of a STATEMENT OF FEDERALLY SPONSORED 052, and the other end of described STATEMENT OF FEDERALLY SPONSORED 052 is connected with described interlock controll block group 022, when overcurrent appears in the power line subscribers feeder; Make described dynamic and static contact separately, load and subscribers feeder are broken off.But still there is following defective in existing circuit breaker:
At first, through long-term use, cause between inside moving contact and the fixed contact of circuit breaker and produced glutinous company, even just circuit breaker is from being in off-state in form, but it in fact still is in closure state, has so just had great potential safety hazard;
Secondly, management of power use department requires in the middle of the process of using circuit breaker, can see tangible cut-off point clearly; In order to guarantee general electric consumer's Electrical Safety; They adopt the mode that circuit breaker and knife switch are in series for this reason, and expectation realizes guaranteeing the effect of obvious cut-off point through the on-off action of knife switch, but the problem of bringing like this is; Whole tripper cost has improved, and volume has also become greatly;
Once more, when powering-off state took place, the user can't judge that circuit has problem, also can break down by circuit breaker, blindly repaired and brought hidden danger to safety;
At last, if circuit breaker failure has taken place, owing to do not have faulty indication, thus cause the electric consumer not know failure cause, just can't in time fix a breakdown, caused hidden danger so just for normal safety utilization of electric power.
In view of above-mentioned defective, creator of the present invention has obtained this creation finally through long term studies and test.
Summary of the invention
The objective of the invention is to, a kind of circuit breaker that shows dynamic and static contact on off operating mode that has is provided, in order to overcome above-mentioned defective.
For realizing above-mentioned purpose, the technical scheme of employing of the present invention is, a kind of circuit breaker that shows dynamic and static contact on off operating mode that has is provided, and it comprises: an actuating mechanism also comprises:
One phase line interface unit, it comprises: a phase line incoming end and a line output terminal mutually, in order to be linked in the power line;
One box body, it is arranged at each above-mentioned part in the described box body, through window on the box body or transparent material;
Described movable contact spring and described static contact are provided with fluoresent coating;
One zero line incoming end;
One power-switching circuit, its output with described zero line incoming end and phase line incoming end and/or phase line links to each other, and it carries out transformation with power voltage line handles, in order to illuminating power to be provided;
One lighting circuit, it has an illuminating lamp and is arranged in the described box body, and is corresponding with the position of described fixed contact, when said handle is in open position, makes said illumination lamp ignition, and projects on the described fluoresent coating.
Preferable; Also comprise: an arc-extinguishing mechanism, it is in order to eliminate the destruction of electric arc to circuit breaker, and it comprises a metal retaining arc plate and an arc-extinguish chamber; Described metal arc extinguishing board is connected with described fixed contact and extends to described box body bottom, and described arc-extinguish chamber is corresponding with described fixed contact;
Preferable, also comprise:
One stand-by power supply;
One charging circuit, it is connected with the output of described power-switching circuit, and to described stand-by power supply power supply;
One detecting commutation circuit, whether it has voltage output in order to detect described power-switching circuit, and when described power-switching circuit unregulated power was exported, starting described stand-by power supply provided illuminating power;
Preferable, described lighting circuit also comprises: a delay circuit is in order to limit the lighting hours of described illuminating lamp;
Preferable; Also comprise: an alarm lamp lighting circuit, it comprises a touch-switch of an alarm lamp and series connection with it, it is arranged at described alarm lamp on the described box body; When described handle is in the open circuit position; Described touch-switch is closed, and when subscribers feeder did not break off, described alarm lamp was reported to the police;
Preferable, also comprise: one second indicator light circuit, it comprises one second indicator light, and it is connected with described phase line incoming end and zero line, and for power failure the time, described second indicator light is bright;
Preferable, described box body integral body is made by the transparent insulation fire proofing;
Preferable, described box body top and corresponding position, described fixed contact position are to be made by the transparent insulation fire proofing;
Preferable, also comprise: an overcurrent protection mechanism, it is a magnetictrip; Be arranged at described actuating mechanism bottom, the one of which end is connected with described movable contact spring, and its other end is connected with an end of a STATEMENT OF FEDERALLY SPONSORED; The other end of described STATEMENT OF FEDERALLY SPONSORED is connected with described interlock controll block; When overcurrent appears in power line, make described sound contact separately, subscribers feeder breaks off.
Be with prior art beneficial effect more of the present invention, at first, overcome between inside moving contact and the fixed contact of circuit breaker and produced the potential safety hazard that glutinous company causes;
Secondly, satisfied management of power use department and required in the middle of the process of using circuit breaker, can see tangible cut-off point clearly, in order to guarantee general electric consumer's aim of safe power utilization, whole tripper cost has reduced, and volume has also diminished;
Once more, when powering-off state took place, the user can judge that circuit has problem, also can break down by circuit breaker, repaired for safety and offered convenience;
At last, because increased faulty indication, when circuit breaker failure had taken place, the user knew failure cause, and can in time fix a breakdown, and guarantee was provided so just for normal safety utilization of electric power.
Description of drawings
Fig. 1 is the cut-away view of prior art circuit breaker;
Fig. 2 has the cut-away view of the embodiment one of the circuit breaker that shows dynamic and static contact on off operating mode for the present invention;
Fig. 3 has the cut-away view of the embodiment two of the circuit breaker that shows dynamic and static contact on off operating mode for the present invention;
Fig. 4 has the cut-away view of the embodiment three of the circuit breaker that shows dynamic and static contact on off operating mode for the present invention;
Fig. 5 has the electrical block diagram one of the embodiment three of the circuit breaker that shows dynamic and static contact on off operating mode for the present invention;
Fig. 6 has the electrical block diagram two of the embodiment three of the circuit breaker that shows dynamic and static contact on off operating mode for the present invention.
Embodiment
In the middle of this specification and claim, used some vocabulary to censure specific assembly; Should understand and have common knowledge the knowledgeable in the affiliated field; Hardware manufacturer may be called same assembly with different nouns, this specification and claim not with the difference of title as the mode of distinguishing assembly, but with the difference of assembly on function as the criterion of distinguishing; Be an open term mentioned " comprising " in the middle of specification and claims in the whole text; So should be construed to " include but be not limited to ", in addition, " connections " speech this be comprise any directly and the indirect means that are electrically connected; Therefore; Be connected with one second device if describe one first device in the literary composition, then represent described first device can directly be electrically connected, or be electrically connected to described second device through other device or the intersegmental ground connection of connection hand at described second device.
The position device that has many group-indicates lamp position (or illuminating lamp), the window's position and some circuit structures among the present invention on the structure of inside; Its position in accompanying drawing or specification; Only be an embodiment; For other conversion equivalent way, those of ordinary skills are the conversion that can make many equivalences behind the present invention having read.For only adopting said actuating mechanism, a phase line interface unit, it comprises: a phase line incoming end and a line output terminal mutually, in order to be linked in the power line; One box body; It is arranged at each above-mentioned part in the described box body; Can see the position relation of sound contact clearly through window on the box body or transparent material user, this this specification of technical scheme is not concrete to launch, but in order to satisfy existing security needs to a certain extent; Some non-essential accessory structures have been increased, like arc-extinguishing mechanism and overcurrent protection machine.Then, do more detailed explanation with other technical characterictic and advantage to the present invention is above-mentioned below in conjunction with accompanying drawing.
See also shown in Figure 2ly, it shows the cut-away view of embodiment one of the circuit breaker of dynamic and static contact on off operating mode for the present invention has; It comprises: a box body, and adopt the insulation fire proofing to make, portion is provided with following structure within it:
One zero line incoming end 044 is in order to insert zero line 041; One phase line interface unit, it comprises: a phase line incoming end 032 and a line output terminal 037 mutually, in order to be linked in the power line; One actuating mechanism, it comprises: one handle 021, it has an operating side and is arranged at outside the described box body 001, carries out the break-make control of circuit; One movable contact spring 024, its end have a moving contact 025; One interlock controll block group 022; It is made up of a plurality of STATEMENT OF FEDERALLY SPONSORED; Axle through being arranged in the said box body 001 rotates, and an end of its STATEMENT OF FEDERALLY SPONSORED that goes up most 0221 is connected with described handle 021, and the end of bottom STATEMENT OF FEDERALLY SPONSORED 0222 is connected with the front end of described movable contact spring 024; One fixed contact 031; It is connected with described phase line input 032, when the described interlock controll block group 022 of turn handle 021 pulling, thereby causes seesawing of movable contact spring 024; Realize moving contact 025 and fixed contact 031 contact and separate, finally reach the purpose of subscribers feeder break-make.
Protect for Electrical Safety and to circuit breaker itself; Also comprise: an arc-extinguishing mechanism and an overcurrent protection mechanism; Described arc-extinguishing mechanism is in order to eliminate the destruction of electric arc to circuit breaker; It comprises a metal retaining arc plate 033 and an arc-extinguish chamber 035, and described metal keeps off arc plate 033 and is connected with described fixed contact 031 and extends to described box body 001 bottom, and described arc-extinguish chamber 035 is corresponding with described fixed contact 031.Described overcurrent protection mechanism is a magnetictrip 051; Be arranged at described actuating mechanism bottom, the one of which end is connected with described movable contact spring 024, and its other end is connected with an end of a STATEMENT OF FEDERALLY SPONSORED 052; The other end of described STATEMENT OF FEDERALLY SPONSORED 052 is connected with described interlock controll block group 022; When overcurrent appears in power line, make described dynamic and static contact separately, subscribers feeder is disconnected.It is by transparent making for transparent perhaps box body top and corresponding position, described fixed contact position that but the embodiment of the invention one it is emphasized that described box body integral body; Perhaps on described box body, offer window; Purpose is exactly to be to see whether having tangible contact and separating except that dynamic and static contact clearly; Judge circuit breaker be disconnected be to close, have conspicuousness in order to make this observation; The present invention has the circuit breaker that shows dynamic and static contact on off operating mode and specially on movable contact spring 024 and static contact, is provided with fluoresent coating 07, for the position of further clear and definite sound contact, has increased an illuminating lamp 061; When described handle 021 places open position; Described illuminating lamp 061 is lighted, and projects on the described fluoresent coating 07, and that observes like this is clearer; For energy savings; We have been provided with delay circuit, and after described illumination 07 was bright, delay circuit can make described illuminating lamp extinguish behind certain hour automatically; If described handle can't be threaded to open position and just explain also that naturally adhesion has taken place in the inner sound of box body contact certainly; Clearly be to need to have changed circuit breaker; It is emphasized that described illuminating lamp is not necessary, for the position relation of just seeing dynamic and static contact clearly.
See also shown in Figure 3ly, it shows the cut-away view of embodiment two of the circuit breaker of dynamic and static contact on off operating mode for the present invention has; The difference of itself and the foregoing description is; Also comprise an alarm lamp lighting circuit, it has a touch-switch 064 of an alarm lamp 062 and series connection with it, and it is arranged at described alarm lamp 062 on the described box body 001; When described handle 021 is in the open circuit position; Described touch-switch 064 is closed, and when subscribers feeder did not break off, described alarm lamp 062 was reported to the police;
If the operating voltage of the alarm lamp 062 that adopts is lower than power voltage line; Then the present invention also needs a power-switching circuit, and its output 037 with described zero line incoming end 044 and phase line incoming end 032 or phase line links to each other, and it carries out transformation with power voltage line and handles; In order to illuminating power to be provided; When if described power-switching circuit breaks down, then alarm lamp 062 can't be worked, and therefore needs a stand-by power supply; Described stand-by power supply is a rechargeable battery, and it is connected with the output of described power-switching circuit through a charging circuit, and to described stand-by power supply power supply; Also comprise a detecting commutation circuit, whether it has voltage output in order to detect described power-switching circuit, and when described power-switching circuit did not have electric weight output, starting described stand-by power supply provided illuminating power.Like this when fault that can't break off has appearred in described circuit breaker, alarm lamp just can, report to the police at once, be to well known to a person skilled in the art technology for the design of these circuit, and be not emphasis, therefore just repeated no more here.
Fig. 4 has the cut-away view of the embodiment three of the circuit breaker that shows dynamic and static contact on off operating mode for the present invention; The difference of itself and described embodiment two is; In the present embodiment, comprise a power line indicator light 063 again, just when power line has electric current to flow through; It informs that the present power line of user is in electricity condition is arranged; Finding power cut problem when electricity consumer is, observes described power line indicator light 063, just can judge that having a power failure still is that fault has taken place circuit breaker.
Need to prove; Above three kinds of embodiment added a kind of new safety measure respectively; These three technical safety measuress; Any two kinds or any one can become a kind of outstanding technical characterictic with the circuit breaker product that shows dynamic and static contact on off operating mode, and those skilled in the art can make corresponding multiple equivalent product according to above-mentioned disclosed technical characterictic.
See also shown in Figure 5ly, it shows the electrical block diagram one of embodiment three of the circuit breaker of dynamic and static contact on off operating mode for the present invention has, and it is (to have only an actuating mechanism to monolithic; Be responsible for the break-make of a phase line) describe, wherein, LED3 is the connection situation that illuminating lamp is convenient to see clearly dynamic and static contact; LED1 is the power line indicator light that whether has electric current to flow through in order in the indication power line, that is to say no matter whether circuit breaker breaks down, all can be bright as long as have electric current to flow through LED1 in the power line; LED2 is the fault indicator light, and its course of work is, when the K switch 1 of circuit breaker is broken off (handle is in open position); Then normal open switch K1-1 closes, and this moment, then illuminating lamp LED3 did not work if do not cut off phase line electric power; This moment, trouble lamp LED2 was bright, was in malfunction now in order to indicate; When described circuit breaker cut-off capacity is normal, then break off (handle is in open position) when the K switch 1 of circuit breaker, then normal open switch K1-1 closes, and this moment, then illuminating lamp LED3 was bright, just can see the off-state of dynamic and static contact for the user clearly if cut off phase line electric power.
See also shown in Figure 6; It has the electrical block diagram two of the embodiment three of the circuit breaker that shows dynamic and static contact on off operating mode for the present invention; It is wherein to have added delay circuit and rectification circuit to two (two actuating mechanisms are arranged, be responsible for the break-make of a phase line and a zero line), when K switch 1, the K2 of circuit breaker break off (handle is in open position); Then normal open switch K1-1, K2-1 close; If this moment, subscribers feeder was not cut off that then trouble lamp LED2 is bright, when described circuit breaker cut-off capacity just often, then trouble lamp LED2 does not work.
No matter whether described circuit breaker cut-off capacity is normal, and when K switch 1, the K2 of circuit breaker break off (handle is in open position), then normal open switch K1-1, K2-1 close; Illuminating lamp LED3 can be bright, observes the state of dynamic and static contact in order to person easy to use, and the positive plate of the capacitor C 1 in the delay circuit wherein obtains positive voltage from the positive pole of described rectification circuit D1-D4; Thereby the base voltage of triode Q1 is raise; When having accumulated a period of time, when reaching conducting state, triode Q2 will be in by state; Then illuminating lamp LED3 opens circuit and extinguishes, thereby has reached purpose of power saving.
The above is merely preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and in spirit that claim of the present invention limited and scope, can carry out many changes to it, revise, in addition equivalent, but all will fall in protection scope of the present invention.
Claims (9)
1. one kind has the circuit breaker that shows dynamic and static contact on off operating mode, and it comprises: an actuating mechanism, it is characterized in that, and also comprise:
One phase line interface unit, it comprises: a phase line incoming end and a line output terminal mutually, in order to be linked in the power line;
One box body, it is arranged at each above-mentioned part in the described box body, through window on the box body or transparent material, makes the user can see the position relation of sound contact clearly;
Described actuating mechanism comprises:
One handle, it has an operating side and is arranged at outside the described box body, carries out the break-make control of circuit;
One movable contact spring, its end has a moving contact;
One interlock controll block group, the one of which end is connected with described handle, and the other end is connected with the front end of described movable contact spring;
One static contact, it is connected with described phase line input;
Described movable contact spring and described static contact are provided with fluoresent coating;
One zero line incoming end;
One power-switching circuit, its output with described zero line incoming end and phase line incoming end and/or phase line links to each other, and it carries out transformation with power voltage line handles, in order to illuminating power to be provided;
One lighting circuit, it has an illuminating lamp and is arranged in the described box body, and is corresponding with the position of described fixed contact, when said handle is in open position, makes said illumination lamp ignition, and projects on the described fluoresent coating.
2. the circuit breaker with the dynamic and static contact of demonstration on off operating mode according to claim 1; It is characterized in that; Also comprise: an arc-extinguishing mechanism, it is in order to eliminate the destruction of electric arc to circuit breaker, and it comprises a metal retaining arc plate and an arc-extinguish chamber; Described metal retaining arc plate is connected with described fixed contact and extends to described box body bottom, and described arc-extinguish chamber is corresponding with described fixed contact.
3. the circuit breaker with the dynamic and static contact of demonstration on off operating mode according to claim 2 is characterized in that, also comprises:
One stand-by power supply;
One charging circuit, it is connected with the output of described power-switching circuit, and to described stand-by power supply power supply;
One detecting commutation circuit, whether it has voltage output in order to detect described power-switching circuit, and when described power-switching circuit unregulated power was exported, starting described stand-by power supply provided illuminating power.
4. the circuit breaker with the dynamic and static contact of demonstration on off operating mode according to claim 1, it is characterized in that described lighting circuit also comprises: a delay circuit is in order to limit the lighting hours of described illuminating lamp.
5. the circuit breaker with the dynamic and static contact of demonstration on off operating mode according to claim 1 is characterized in that, also comprises: an alarm lamp lighting circuit; It comprises a touch-switch of an alarm lamp and series connection with it; It is arranged at described alarm lamp on the described box body, and when described handle was in the open circuit position, described touch-switch was closed; When subscribers feeder did not break off, described alarm lamp was reported to the police.
6. the circuit breaker with the dynamic and static contact of demonstration on off operating mode according to claim 1; It is characterized in that, also comprise: one second indicator light circuit, it comprises one second indicator light, and it is connected with described phase line incoming end and zero line; When having a power failure, described second indicator light is bright.
7. according to claim 1,2 or 6 described circuit breakers, it is characterized in that described box body integral body is made by the transparent insulation fire proofing with the dynamic and static contact of demonstration on off operating mode.
8. according to claim 1,2 or 6 described circuit breakers, it is characterized in that described box body top and corresponding position, described fixed contact position are to be made by the transparent insulation fire proofing with the dynamic and static contact of demonstration on off operating mode.
9. the circuit breaker with the dynamic and static contact of demonstration on off operating mode according to claim 1 is characterized in that, also comprises: an overcurrent protection mechanism; It is a magnetictrip, is arranged at described actuating mechanism bottom, and the one of which end is connected with described movable contact spring; Its other end is connected with an end of a STATEMENT OF FEDERALLY SPONSORED, and the other end of described STATEMENT OF FEDERALLY SPONSORED is connected with described interlock controll block group, when overcurrent appears in power line; Make described sound contact separately, subscribers feeder breaks off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101684554A CN101447371B (en) | 2007-11-26 | 2007-11-26 | Circuit breaker capable of displaying on-off state of moving and static contacts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101684554A CN101447371B (en) | 2007-11-26 | 2007-11-26 | Circuit breaker capable of displaying on-off state of moving and static contacts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101447371A CN101447371A (en) | 2009-06-03 |
| CN101447371B true CN101447371B (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101684554A Expired - Fee Related CN101447371B (en) | 2007-11-26 | 2007-11-26 | Circuit breaker capable of displaying on-off state of moving and static contacts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101447371B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599386B (en) * | 2009-07-02 | 2012-07-25 | 北京合锐赛尔电力科技有限公司 | Load switch used in visual fracture state of 24kV power distribution system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036292A (en) * | 1988-01-28 | 1989-10-11 | 西屋电气公司 | Molded case circuit breaker with observation window and traverse |
| CN1046810A (en) * | 1989-04-24 | 1990-11-07 | 株式会社日立制作所 | The circuit breaker that has voltage changer |
| CN2114219U (en) * | 1992-01-16 | 1992-08-26 | 刘钟 | Miniature circuit breaker |
| CN1591724A (en) * | 2003-08-28 | 2005-03-09 | 伊顿公司 | Circuit breaker employing an illuminated operating handle |
-
2007
- 2007-11-26 CN CN2007101684554A patent/CN101447371B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036292A (en) * | 1988-01-28 | 1989-10-11 | 西屋电气公司 | Molded case circuit breaker with observation window and traverse |
| CN1046810A (en) * | 1989-04-24 | 1990-11-07 | 株式会社日立制作所 | The circuit breaker that has voltage changer |
| CN2114219U (en) * | 1992-01-16 | 1992-08-26 | 刘钟 | Miniature circuit breaker |
| CN1591724A (en) * | 2003-08-28 | 2005-03-09 | 伊顿公司 | Circuit breaker employing an illuminated operating handle |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平7-182959A 1995.07.21 |
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| CN101447371A (en) | 2009-06-03 |
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Application publication date: 20090603 Assignee: Hubei Shengjia Electrical Equipment Co., Ltd. Assignor: Wan Jiasheng Contract record no.: 2014420000149 Denomination of invention: Circuit breaker capable of displaying on-off state of moving and static contacts Granted publication date: 20120222 License type: Exclusive License Record date: 20140717 |
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