CN106206199A - The trip gear of low-voltage circuit breaker - Google Patents

The trip gear of low-voltage circuit breaker Download PDF

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Publication number
CN106206199A
CN106206199A CN201610848654.9A CN201610848654A CN106206199A CN 106206199 A CN106206199 A CN 106206199A CN 201610848654 A CN201610848654 A CN 201610848654A CN 106206199 A CN106206199 A CN 106206199A
Authority
CN
China
Prior art keywords
draw bar
regulation
window
circuit breaker
voltage circuit
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.)
Pending
Application number
CN201610848654.9A
Other languages
Chinese (zh)
Inventor
王炯华
顾建青
唐维春
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changshu Switchgear Manufacturing Co Ltd
Original Assignee
Changshu Switchgear Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Changshu Switchgear Manufacturing Co Ltd filed Critical Changshu Switchgear Manufacturing Co Ltd
Priority to CN201610848654.9A priority Critical patent/CN106206199A/en
Publication of CN106206199A publication Critical patent/CN106206199A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/14Electrothermal mechanisms
    • H01H71/16Electrothermal mechanisms with bimetal element
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427Adjusting only the electrothermal mechanism
    • H01H71/7436Adjusting the position (or prestrain) of the bimetal

Abstract

A kind of trip gear of low-voltage circuit breaker, including housing, housing includes pedestal and base seat lid, draw bar regulation window is set in base seat lid, trip gear includes that the draw bar being located in pedestal and at least is for activating the bimetallic element of draw bar action, draw bar is had to regulate flange on draw bar, draw bar regulation flange is corresponding with draw bar regulation window, when being adjusted axially draw bar through draw bar regulation window, the spacing between draw bar and bimetallic element changes and uses the realization adjustment to electric current gear.Directly by draw bar regulation window, draw bar is adjusted axially, along draw bar hub setting axle, the spacing changing between draw bar from bimetallic element and uses the realization adjustment to different electric current gears, the factor of the size reduction of chopper short transverse of both can having eliminated the effects of the act, can meet again the chopper requirement to miniaturization;Save space and the parts of height degree shared by adjustable dial-up of transshipping, contribute to manufacture, Simplified flowsheet and reduce cost.

Description

The trip gear of low-voltage circuit breaker
Technical field
The invention belongs to low voltage electrical apparatus technology field, be specifically related to the trip gear of a kind of low-voltage circuit breaker.
Background technology
Above mentioned trip gear refers mainly to magnetic trip gear, and more precisely, (industry is also to refer to thermal magnetic trip gear Custom is called " Pyromagnetic release "), the version of thermal magnetic trip gear mainly has two kinds: one to be by bimetallic element structure The overload delay protection trip gear become;Two is the short-circuit protection wink ejector half trip gear of electric magnet form.When circuit being detected In abnormal current time, the action of thermal magnetic trip gear activate circuit breaker tripping, disengagement failure circuit.Additionally, according to The current setting of chopper whether adjustable, thermo magnetic trip release device is divided into again fixed pattern and adjustable type two kinds.
For the thermal magnetic adjustable tripping device in prior art, typically by the regulation of rotary dial-up is driven Draw bar and use
Realize the adjustable of rated current gear.It is " a kind of for chopper that typical document disclosure such as CN201886993U recommends Overload protection adjusting device " and CN201369299Y provide " overload protection arrangement of Thermomagnetic type overcurrent trip ", and These two patents being not limited to enumerate are all the overload releases using bimetallic element as overload protection heater element, from double gold The operating characteristic (also can claim physical characteristic) belonging to element is considered, it is generally the case that the size of the short transverse of bimetallic element is more Greatly, deformation deflection and thrust performance had positive effect.Bimetallic element temperature distortion and act on draw bar, and further Activate the tripping mechanism action of chopper and disengagement failure circuit.As is known in the industry, aforesaid short-circuit protection wink ejector half is taken off For buckle device, typically can be changed the spring force of the reaction spring acting on armature by the operation of dial-up adjustable to magnetic force, To realize the adjustment of rated current gear, and owing to the installation site of reaction spring can be adjusted flexibly as desired, because of And the height of the adjustable dial-up of magnetic force can be tackled flexibly, the size of chopper short transverse will not be produced impact, i.e. will not increase The volume of big chopper is in other words to the increase of chopper volume inconspicuous.But as aforesaid adjustable type and by double For the overload delay protection trip gear that hardware is constituted, owing to it is by being pointed to above (corresponding to) draw bar The regulation of regulation dial-up (be transship adjustable dial-up) to change between draw bar and bimetallic element distance (also referred to as " Gap ") and use and realize the regulation to rated current, thus regulation dial-up often occupies obvious height dimension, to open circuit The increase that body amasss is the most obvious.
Therefore, eliminate and by what the adjustable dial-up of overload produced, the influence factor reducing chopper height dimension is used satisfied The small form factor requirements of chopper volume is the most useful.Useful design has been made for this applicant, described below Technical scheme produces under this background.
Summary of the invention
The task of the present invention is to provide a kind of contributing to abandon the adjustable dial-up of overload to draw bar regulation and use and disappear Except affecting factor that chopper height dimension reduces and making chopper meet the trip gear of low-voltage circuit breaker of small form factor requirements.
The task of the present invention is performed by, the trip gear of a kind of low-voltage circuit breaker, described low-voltage circuit breaker Including a housing, housing includes a pedestal and a base seat lid matched with pedestal, offers a draw bar in base seat lid Regulation window, described trip gear includes that the draw bar being arranged in described pedestal and at least one piece are for activating draw bar The bimetallic element of action, constitutes on described draw bar and has a draw bar regulation flange, this draw bar regulation flange and institute State draw bar regulation window corresponding, when described draw bar being adjusted axially through described draw bar regulation window, this traction Spacing between bar and described bimetallic element changes and uses the realization adjustment to electric current gear.
In a specific embodiment of the present invention, on the top of described bimetallic element and towards described traction The side of bar is provided with a draw bar actuated piece, and on draw bar and in the position on the top corresponding to described bimetallic element Put and be extended with draw bar actuating projection, activate at this draw bar protruding towards the side of bimetallic element and corresponding to described The region of draw bar actuated piece is constituted a draw bar actuated piece actuating tapers, when regulating window to traction through described draw bar Bar along draw bar hub setting axle make axial displacement regulation time, described draw bar actuated piece actuating tapers and described draw bar actuated piece Between space change and use and realize adjustment to described electric current gear.
In another specific embodiment of the present invention, the top of described bimetallic element is provided with an actuator block, And be fixed with an actuator block actuated piece on described draw bar and in the position corresponding to actuator block, described actuator block towards The side of actuator block actuated piece is constituted an actuator block actuating tapers, when through described draw bar regulation window to draw bar along Described draw bar hub setting axle make axial displacement regulation time, between described actuator block actuating tapers and described actuator block actuated piece between Gap changes and uses the realization adjustment to described electric current gear.
In another specific embodiment of the present invention, it is provided with one first tegillum in one end of described base seat lid, Described draw bar regulation window is opened in this and first little covers, described draw bar regulation flange be opened in described first little The described draw bar regulation window covered is corresponding, has holding section, and adjust at draw bar on described draw bar regulation flange Joint window is provided with the multiple draw-in grooves corresponding with holding section, and when draw bar slides axially, described holding section engages with draw-in groove And draw bar is adjusted and positions.
In another specific embodiment of the present invention, it is provided above the second tegillum at the first described tegillum, This second little covering offers the display window corresponding with described draw bar regulation window, in the position of the side of display window It is provided with the reference mark for disclosing different electric current gear.
Also having in a specific embodiment in the present invention, described draw bar actuated piece is bearing pin or screw.
In more and in a specific embodiment of the present invention, described actuator block actuated piece is bearing pin or screw;Described Actuator block be high temperature resistant actuator block.
The present invention's and then in a specific embodiment, described high temperature resistant actuator block is unsaturated polyester die plastic Or enhancing fire-retardant nylon.
In the most more and in a specific embodiment of the present invention, the shape of described draw bar regulation window be convex shape or L-shaped.
In again and then in a specific embodiment of the present invention, in described base seat lid and be substantially located at base seat lid Middle part constitute have an operating mechanism handle cavity, described operating mechanism has an operating mechanism handle, this operating mechanism handle Base seat lid is leant out in the position corresponding to operating mechanism handle cavity.
Having the technical effect that owing to being additionally arranged draw bar hub setting axle and by draw bar sky of the technical scheme that the present invention provides It is enclosed within draw bar hub setting axle, thus has abandoned the overload in the structural system of the overload tripping device in prior art and can allot Code, and change into directly by draw bar regulation window draw bar being adjusted axially along draw bar hub setting axle changing traction The adjustment that spacing between bar from bimetallic element and using realizes different electric current gears, chopper height of both can having eliminated the effects of the act The factor of the size reduction in direction, can meet again the chopper requirement to miniaturization;Owing to having abandoned the adjustable dial-up of overload, Thus save the space of the adjustable dial-up of overload shared height degree, and owing to saving without the adjustable dial-up of operating overload Parts, not only contribute to manufacturing but also being conducive to Simplified flowsheet and reduce cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of present configuration.
Fig. 2 is the first embodiment structure chart of the trip gear of the present invention.
Fig. 3 is the second example structure figure of the trip gear of the present invention.
Fig. 4 draw bar regulation window of covering little with first shown in Fig. 1 that be the draw bar shown in Fig. 2 and Fig. 3 and the The schematic diagram that the two little display windows covered match.
Fig. 5 is the structure chart of the second tegillum shown in Fig. 4.
Fig. 6 is the schematic diagram that the draw bar regulation flange on the draw bar of Fig. 1 and Fig. 2 probes into draw bar regulation window.
Fig. 7 is the structure chart of draw bar.
Detailed description of the invention
For the ease of being more clearly understood from technical spirit and the beneficial effect of the present invention, applicant is below with embodiment Mode elaborate, but the description to embodiment is not the restriction to the present invention program, any according to structure of the present invention Pro forma rather than the substantial equivalent transformation that is only done by think of is regarded as technical scheme category.
Embodiment 1:
Refer to Fig. 1, Fig. 4 to Fig. 7, it is shown that the knot of low-voltage circuit breaker (the present embodiment is low-pressure plastic shell circuit breaker, as follows) One housing 1 and an operating mechanism 2 of structure system, housing 1 includes pedestal 11 and the base seat lid 12 matched with pedestal 11, In operating mechanism 2 is arranged on pedestal 11 and lean out base seat lid 12.In base seat lid 12 and be positioned at one end of base seat lid 12 and set Being equipped with a cover plate, this cover plate includes the first tegillum 121 and the second tegillum 122, and the second tegillum 122 covers on the first tegillum 121 Side.This first tegillum 121 offers a draw bar regulation window 1211, the second tegillum 122 offers and draw bar The display window 1221 that regulation window 1211 is corresponding.As shown in Figure 1, in base seat lid 12 and be substantially located at base seat lid 12 Middle part constitute have an operating mechanism handle cavity 123, aforesaid operating mechanism 2 to have an operating mechanism handle 21, this operation machine Structure handle 21 leans out base seat lid 12 in the position corresponding to operating mechanism handle cavity 123.Owing to operating mechanism 2 belongs to prior art And it is no lack of in disclosed Chinese patent literature and is seen in, thus applicant repeats no more.
Refer to Fig. 2 and Fig. 4 to Fig. 6 and combine Fig. 1, it is shown that the structural system of trip gear, this trip gear The position of the lower section being included in the length direction corresponding to aforementioned first tegillum 121 is arranged on the draw bar in aforementioned pedestal 11 3 and three pieces (but being not limited to three pieces) is for activating the bimetallic element 4 of draw bar 3 action, the trip gear bag said here Include overload thermal trip and short circuit instantaneous protection electrical apparatus release.
Technical essential as the technical scheme that the present invention provides: the structural system of aforesaid trip gear also includes one Draw bar hub setting axle 5, the two ends of this draw bar hub setting axle 5 are rotatably supported on the corresponding wall body of aforementioned pedestal 11 (shown in Fig. 1 The left and right wall body of location status) and it is simultaneously corresponding to the lower section of length direction of aforementioned first tegillum 121, aforesaid draw bar 3 empty sets draw bar put on axle 5 and when through (i.e. passing through) aforementioned draw bar regulation window 1211 to aforementioned draw bar 3 along When aforementioned draw bar hub setting axle 5 is adjusted axially, the spacing between this draw bar 3 and aforementioned bimetallic element 4 changes and uses Realize the adjustment to electric current gear.It follows that the concept of aforesaid empty set refers to that draw bar 3 both can be at draw bar hub setting axle 5 Upper axial displacement can rotate around draw bar hub setting axle 5 again.
On the top of aforesaid bimetallic element 4 and be provided with a draw bar towards the side of aforementioned draw bar 3 and activate Part 41, and and be extended with draw bar in the position on the top corresponding to aforementioned bimetallic element 4 on draw bar 3 and activate projection 31, activate protruding 31 towards the side of bimetallic element 4 and corresponding to aforementioned draw bar actuated piece 41 at this draw bar Region constitute have a draw bar actuated piece actuating tapers 311, when through aforementioned draw bar regulation window 1211 to draw bar 3 along When aforementioned draw bar hub setting axle 5 makees axial displacement regulation, aforementioned draw bar actuated piece actuating tapers 311 activates with aforementioned draw bar The adjustment that space change between part 41 and using realizes aforementioned currents gear.
When the trip gear of the present invention shows as aforesaid short circuit instantaneous protection electrical apparatus release, then its structural system is also wrapped Include preferably equal with the quantity of bimetallic element 4 action armature 6(Fig. 3 to show).According to known technology, when chopper detects During overcurrent, bimetallic element 4(is also referred to as bimetal leaf) it is heated and deforms upon and made by aforesaid draw bar actuated piece 41 Draw bar 3 is i.e. promoted for draw bar 3(), or action armature 6 acts on draw bar 3, makes draw bar 3 around draw bar hub setting axle 5 rotate, and then are threaded off by its aforesaid operating mechanism 2 of actuating, to cut off circuit (faulty circuit).
Shown in Fig. 2, Fig. 4, Fig. 5 and Fig. 7, shown, aforesaid draw bar 3 is constituted and has a draw bar regulation flange 33, this draw bar regulation flange 33 offers poke hole 331, stretches into poke hole 331 when stirring instrument such as screwdriver, can dial Dynamic draw bar 3 moves axially on draw bar hub setting axle 5.Regulate at described draw bar and there is on flange 33 holding section 332, and Draw bar regulation window 1211 is provided with the multiple draw-in grooves 12111 corresponding with holding section 332, when draw bar 3 slides axially, Described holding section 332 engages adjustable positioning towed bar 3 with draw-in groove 12111.Before this draw bar regulates flange 33 and is opened in State the regulation window of the draw bar on the first tegillum 121 1211 and display window 1221 phase being opened on aforementioned second tegillum 122 Corresponding.It is provided with for disclosing difference on the second tegillum 122 and at the side position corresponding to aforementioned display window 1221 The reference mark 1222 of electric current gear, with reference to mark such as 0.8Ir, 0.9Ir or 1.0Ir.
At the present embodiment, aforesaid draw bar actuated piece 41 is screw, but may be used without columnar pin shaft or other equivalence Parts.
In the present embodiment, the shape of aforementioned draw bar regulation window 1211 is convex shape or L-shaped, and draw bar regulates The regulation region of the electric current gear that wider region is trip gear of window 1211, by draw bar regulation window 1211 to leading Draw on bar 3 aforementioned draw bar regulation flange 33 regulate, make the draw bar 3 position change on draw bar hub setting axle 5 and After chopper detects abnormal current, trip gear action is moved in trip gear action or short circuit wink, touches draw bar 3 around draw bar Hub setting axle 5 rotates, and the draw bar regulation flange 33 of draw bar 3 can avoid the window wall 12112 of draw bar regulation window 1211 (Fig. 6 shows).Position or the receipts of " L " font only side are narrowed in the both sides of the "convex" shaped structure of draw bar regulation window 1211 Narrow portion position is available for the draw bar regulation flange 33 of draw bar 3 and enters, and can be stoped by the restriction effect of aforesaid window wall 12112 Draw bar 3 pivots around draw bar hub setting axle 5.
Embodiment 2:
Referring to Fig. 3, arranging (the present embodiment is for setting) on the top of aforementioned bimetallic element 4 has an actuator block 42, and front State on draw bar 3 and be fixed with an actuator block actuated piece 32 in the position corresponding to actuator block 42, in aforementioned actuator block 42 court Constitute to the side of actuator block actuated piece 32 and have an actuator block actuating tapers 421, when regulating window 1211 through aforementioned draw bar To draw bar 3 along when being wanted this draw bar hub setting axle 5 to make axial displacement regulation, aforementioned actuator block actuating tapers 421 is with aforementioned The adjustment that space change between actuator block actuated piece 32 and using realizes aforementioned currents gear.
In the present embodiment, aforesaid actuator block actuated piece 32 is bearing pin or screw, specifically as to draw bar actuated piece The description of 41, aforesaid actuator block 42 is high temperature resistant actuator block, high temperature resistant actuator block material such as unsaturated polyester die plastic or increasing Strong fire-retardant nylon etc..Remaining is all with the description to embodiment 1.
The technical scheme that the present invention provides, can be by right in addition to the technique effect mentioned in superincumbent technique effect hurdle The further optimization of structure, the such as glide direction at draw bar 3 increase the structural member of a locking draw bar 3, can avoid Draw bar 3 is activated by overload release or short-circuit release due to overload or short circuit, embodies the technique effect of disconnecting switch, with full The foot present invention suitability requirement to different operating modes.

Claims (10)

1. a trip gear for low-voltage circuit breaker, described low-voltage circuit breaker includes that a housing (1), housing (1) include a base Seat (11) and a base seat lid (12) matched with pedestal (11), offer a draw bar regulation window in base seat lid (12) (1211), described trip gear include the draw bar (3) being arranged in described pedestal (11) and at least one piece be used for activating The bimetallic element (4) of draw bar (3) action, it is characterised in that have a draw bar regulation in the upper composition of described draw bar (3) Flange (33), this draw bar regulation flange (33) is corresponding, when through described traction with described draw bar regulation window (1211) When described draw bar (3) is adjusted axially by bar regulation window (1211), between this draw bar (3) and described bimetallic element (4) Spacing change and use and realize adjustment to electric current gear.
The trip gear of low-voltage circuit breaker the most according to claim 1, it is characterised in that at described bimetallic element (4) Top and be provided with a draw bar actuated piece (41) towards the side of described draw bar (3), and upper at draw bar (3) and It is extended with draw bar in the position on the top corresponding to described bimetallic element (4) and activates protruding (31), activate at this draw bar Protruding (31) towards the side of bimetallic element (4) and have one in the region composition corresponding to described draw bar actuated piece (41) Draw bar actuated piece actuating tapers (311), when regulating window (1211) to draw bar (3) along draw bar through described draw bar When hub setting axle (5) makees axial displacement regulation, described draw bar actuated piece actuating tapers (311) and described draw bar actuated piece (41) Between space change and use and realize adjustment to described electric current gear.
The trip gear of low-voltage circuit breaker the most according to claim 2, it is characterised in that at described bimetallic element (4) Top is provided with an actuator block (42), and above and is fixed with in the position corresponding to actuator block (42) at described draw bar (3) One actuator block actuated piece (32), described actuator block (42) towards actuator block actuated piece (32) side constitute have one actuator block cause Dynamic inclined-plane (421), when regulating window (1211) to draw bar (3) along described draw bar hub setting axle (5) through described draw bar When making axial displacement regulation, the space change between described actuator block actuating tapers (421) and described actuator block actuated piece (32) And use the adjustment realized described electric current gear.
The trip gear of low-voltage circuit breaker the most according to claim 1, it is characterised in that in described base seat lid (12) One end is provided with one first tegillum (121), and described draw bar regulation window (1211) is opened on this first tegillum (121), Described draw bar regulation flange (33) and described draw bar regulation window (1211) being opened on described first tegillum (121) Corresponding, described draw bar regulation flange (33) has holding section (332), and on draw bar regulation window (1211) It is provided with the multiple draw-in grooves (12111) corresponding with holding section (332), when draw bar (3) slides axially, described holding section (332) engage with draw-in groove (12111) and draw bar (3) is adjusted and positions.
The trip gear of low-voltage circuit breaker the most according to claim 4, it is characterised in that at described the first tegillum (121) It is provided above the second tegillum (122), this second tegillum (122) offers and regulates window (1211) phase with described draw bar Corresponding display window (1221), is provided with in the position of the side of display window (1221) for disclosing different electric current gear With reference to mark (1222).
The trip gear of low-voltage circuit breaker the most according to claim 2, it is characterised in that described draw bar actuated piece (41) it is bearing pin or screw.
The trip gear of low-voltage circuit breaker the most according to claim 3, it is characterised in that described actuator block actuated piece (32) it is bearing pin or screw;Described actuator block (42) is high temperature resistant actuator block.
The trip gear of low-voltage circuit breaker the most according to claim 7, it is characterised in that described high temperature resistant actuator block is Unsaturated polyester die plastic or enhancing fire-retardant nylon.
9. according to the trip gear of the low-voltage circuit breaker described in claim 1 to 5 any claim, it is characterised in that described in lead The shape drawing bar regulation window (1211) is convex shape or L-shaped.
The trip gear of low-voltage circuit breaker the most according to claim 1, it is characterised in that in described base seat lid (12) also And the middle part composition being substantially located at base seat lid (12) has an operating mechanism handle cavity (123), described operating mechanism (2) to have One operating mechanism handle (21), this operating mechanism handle (21) leans out base in the position corresponding to operating mechanism handle cavity (123) Flap (12).
CN201610848654.9A 2016-09-26 2016-09-26 The trip gear of low-voltage circuit breaker Pending CN106206199A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610848654.9A CN106206199A (en) 2016-09-26 2016-09-26 The trip gear of low-voltage circuit breaker

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Application Number Priority Date Filing Date Title
CN201610848654.9A CN106206199A (en) 2016-09-26 2016-09-26 The trip gear of low-voltage circuit breaker

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CN106206199A true CN106206199A (en) 2016-12-07

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0143022A1 (en) * 1983-10-21 1985-05-29 Merlin Gerin Thermal and magnetic circuit breaker tripping mechanism
US4642597A (en) * 1984-12-06 1987-02-10 Mitsubishi Denki Kabushiki Kaisha Overcurrent relay
CN87104289A (en) * 1986-06-20 1988-06-08 西屋电气公司 Circuit breaker with adjustable thermal tripping mechanism
CN201392791Y (en) * 2009-03-12 2010-01-27 浙江嘉凯电气有限公司 Molded case circuit breaker
CN202996744U (en) * 2011-06-24 2013-06-12 Ls产电株式会社 Circuit breaker for wiring purpose
CN104332364A (en) * 2014-11-14 2015-02-04 德力西电气有限公司 Circuit breaker tripping mechanism
CN206022279U (en) * 2016-09-26 2017-03-15 常熟开关制造有限公司(原常熟开关厂) The trip gear of low-voltage circuit breaker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0143022A1 (en) * 1983-10-21 1985-05-29 Merlin Gerin Thermal and magnetic circuit breaker tripping mechanism
US4642597A (en) * 1984-12-06 1987-02-10 Mitsubishi Denki Kabushiki Kaisha Overcurrent relay
CN87104289A (en) * 1986-06-20 1988-06-08 西屋电气公司 Circuit breaker with adjustable thermal tripping mechanism
CN201392791Y (en) * 2009-03-12 2010-01-27 浙江嘉凯电气有限公司 Molded case circuit breaker
CN202996744U (en) * 2011-06-24 2013-06-12 Ls产电株式会社 Circuit breaker for wiring purpose
CN104332364A (en) * 2014-11-14 2015-02-04 德力西电气有限公司 Circuit breaker tripping mechanism
CN206022279U (en) * 2016-09-26 2017-03-15 常熟开关制造有限公司(原常熟开关厂) The trip gear of low-voltage circuit breaker

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Application publication date: 20161207