CN106531572B - Manual circuit breaker device for permanent magnet mechanism and the breaker for using the device - Google Patents

Manual circuit breaker device for permanent magnet mechanism and the breaker for using the device Download PDF

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Publication number
CN106531572B
CN106531572B CN201611028731.2A CN201611028731A CN106531572B CN 106531572 B CN106531572 B CN 106531572B CN 201611028731 A CN201611028731 A CN 201611028731A CN 106531572 B CN106531572 B CN 106531572B
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CN
China
Prior art keywords
shaft
permanent magnet
magnet mechanism
coupling shaft
circuit breaker
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CN201611028731.2A
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Chinese (zh)
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CN106531572A (en
Inventor
赵艳红
王红艳
王刚
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State Grid Corp of China SGCC
Pinggao Group Co Ltd
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State Grid Corp of China SGCC
Pinggao Group Co Ltd
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Priority to CN201611028731.2A priority Critical patent/CN106531572B/en
Publication of CN106531572A publication Critical patent/CN106531572A/en
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    • HELECTRICITY
    • H01ELECTRIC 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

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The present invention relates to Manual circuit breaker device for permanent magnet mechanism and use the breaker of the device.It further includes erection seat that Manual circuit breaker device for permanent magnet mechanism, which includes for the shaft hinged seat that operates shaft rolling assembling, and the shaft hinged seat is fixed on erection seat, and erection seat is equipped with the mechanism case fixed structure that is fixedly connected for the mechanism case with permanent magnet mechanism;The Manual circuit breaker device for permanent magnet mechanism further includes the Coupling Shaft of rotation setting, operates and is connected between shaft and Coupling Shaft by drive mechanism.In this way, erection seat forms independent shaft hinged seat installation base body, convenient for guaranteeing structural strength, to play the problem of preventing shaft hinged seat from relative displacement occurs, in addition, the operation shaft of the structure can use shorter length, it is more advantageous to the structural strength for guaranteeing shaft hinged seat installation base body, and then guarantees the stroke accuracy of operation shaft overhead cam, and avoids not resetting after the completion of operation shaft clamping stagnation or separating brake, required separating brake external force is small, high reliablity.

Description

Manual circuit breaker device for permanent magnet mechanism and the breaker for using the device
Technical field
The present invention relates to Manual circuit breaker device for permanent magnet mechanism and use the breaker of the device.
Background technique
Permanent magnet mechanism with its service life simple and reliable for structure it is long the features such as obtain user's favor, control completely by being controlled electronically It realizes, remains to reliable separating brake, permanent magnetic motor when burst power-off, controller abnormal spoilage to realize in practical application Hand separating device, that is, mechanical-manual switching-off device of structure be it is essential, way of realization be also multiplicity.
Existing Manual circuit breaker device for permanent magnet mechanism such as Authorization Notice No. is that the Chinese patent of 103903920 B of CN discloses The manual switching-off device for permanent magnet mechanism, including fixed installation portion and operation control portion, wherein fixed installation portion is by permanent magnetism The mechanism case of mechanism is formed, and the first fixed mounting plate and the second fixed mounting plate are divided into, and the first fixed mounting plate is mechanism case side Plate, the second fixed mounting plate are mechanism case bottom plate, and permanent magnet mechanism is fixed on mechanism case side plate, is equipped with simultaneously on mechanism case side plate First fixed block, i.e. the first mounting structure, mechanism case bottom plate are equipped with the second fixed block, i.e. the second mounting structure is corresponding to grasp The both ends for making shaft are respectively hinged on the first fixed block and the second fixed block, and one end is pierced by the second fixed block, is used for Attended operation handle.In addition, operation shaft is equipped with caging bolt and reduction torsion spring, it is additionally provided with the fortune for pushing tow permanent magnet mechanism The groove or cam of dynamic main shaft, reduction torsion spring by caging bolt to operation shaft force, mechanism case bottom plate be equipped with for The limited block of caging bolt block cooperation, groove or cam are for realizing permanent magnet mechanism separating brake.
But manual switching-off device disclosed in above-mentioned patent, the shaft of the first and second fixed block formation operation shaft are hinged Seat, since the first and second fixed block is separately fixed on mechanism case side plate and mechanism case bottom plate, and permanent magnet mechanism when manual brake separating Motive spindle can generate very big opposition to operation shaft, so that operation shaft is formed using the first fixed block as fulcrum Lever construction, side plate of mechanism case and bottom plate are easy to happen relative deformation during this, to influence to operate shaft overhead cam Stroke accuracy, when deforming larger, result even in operation shaft clamping stagnation or separating brake after the completion of can not reset, thus serious shadow The reliability for ringing the movement of permanent magnet mechanism separating brake, causes biggish security risk to equipment and personnel., mechanism case case low for grade For the relatively thin breaker of wall, the above problem is more prominent.
Summary of the invention
The object of the present invention is to provide a kind of Manual circuit breaker device for permanent magnet mechanism and using the breaker of the device, to solve The problem of manual switching-off device poor reliability in the prior art.
To achieve the above object, the present invention in Manual circuit breaker device for permanent magnet mechanism the technical solution adopted is that:
Scheme 1: Manual circuit breaker device for permanent magnet mechanism, including further including dress for the shaft hinged seat for operating shaft rolling assembling Seat is set, the shaft hinged seat is fixed on erection seat, and erection seat is equipped with and is fixedly connected for the mechanism case with permanent magnet mechanism Mechanism case fixed structure;The Manual circuit breaker device for permanent magnet mechanism further includes the Coupling Shaft of rotation setting, operates shaft and turns It is connected between spindle by drive mechanism.
Scheme 2: Manual circuit breaker device for permanent magnet mechanism according to scheme 1, described device seat include body supports plate and The bending support plate on body supports edges of boards edge is set.
Scheme 3: according to Manual circuit breaker device for permanent magnet mechanism described in scheme 2, body supports plate is equipped with fixed block, fixed Block and bending support plate are located at the same side of body supports plate, and it is hinged that fixed block and corresponding bending support plate are equipped with shaft Hole, bending support plate of the shaft hinged seat by fixed block and equipped with shaft hinge hole are constituted.
Scheme 4: Manual circuit breaker device for permanent magnet mechanism according to scheme 3, the bending support plate equipped with shaft hinge hole With the outside wall surface for the mechanism chamber interior wall close fit with permanent magnet mechanism.
Scheme 5: Manual circuit breaker device for permanent magnet mechanism according to scheme 3, the body supports backboard is to the bending The side of support plate is equipped with permanent magnet mechanism fixed structure.
Scheme 6: according to Manual circuit breaker device for permanent magnet mechanism described in any one of scheme 1-5, the Coupling Shaft and behaviour Make shaft coaxial arrangement, the drive mechanism is the elastic cylindrical pin being arranged between Coupling Shaft and operation shaft.
Scheme 7: Manual circuit breaker device for permanent magnet mechanism according to scheme 6, the Manual circuit breaker device for permanent magnet mechanism is also Including the Coupling Shaft installation set on the mechanism case for being fixed to permanent magnet mechanism, Coupling Shaft rolling assembling is in Coupling Shaft installation set Interior, Coupling Shaft installation set outer cover is equipped with torsional spring, and two force sides of torsional spring connect with elastic cylindrical pin and Coupling Shaft installation set respectively It connects.
Scheme 8: Manual circuit breaker device for permanent magnet mechanism according to scheme 6, Coupling Shaft are arranged on door-plate, elastic cylinder Pin is fixed in Coupling Shaft or operation shaft, another end face of Coupling Shaft and operation shaft is equipped with for elastic cylindrical pin edge The fluting that Coupling Shaft is axially embedded in.
Scheme 9: according to Manual circuit breaker device for permanent magnet mechanism described in scheme 8, one end of the separate operation shaft of Coupling Shaft It is pierced by the door-plate of mechanism case, door-plate is equipped with the limited block cooperated with operation handle block.
Breaker the technical solution adopted is that:
Scheme 1: breaker, including mechanism case, mechanism case is interior to be equipped with permanent magnet mechanism and Manual circuit breaker device for permanent magnet mechanism, forever Magnetic mechanism manual switching-off device includes the shaft hinged seat for operating shaft rolling assembling, further includes erection seat, the shaft hinge Joint chair is fixed on erection seat, and erection seat is equipped with the mechanism case fixed knot being fixedly connected for the mechanism case with permanent magnet mechanism Structure;The Manual circuit breaker device for permanent magnet mechanism further includes the Coupling Shaft of rotation setting, operates and passes through biography between shaft and Coupling Shaft Dynamic structure connection.
Scheme 2: breaker according to scheme 1, described device seat include body supports plate and are arranged in body supports The bending support plate on edges of boards edge.
Scheme 3: according to breaker described in scheme 2, body supports plate is equipped with fixed block, fixed block and bending support plate Positioned at the same side of body supports plate, fixed block and corresponding bending support plate are equipped with shaft hinge hole, and the shaft is hinged Seat is made of fixed block with the bending support plate equipped with shaft hinge hole.
Scheme 4: breaker according to scheme 3, the bending support plate equipped with shaft hinge hole, which has, to be used for and permanent magnetism The outside wall surface of the mechanism chamber interior wall close fit of mechanism.
Scheme 5: breaker according to scheme 3, the body supports backboard are set to the side of the bending support plate There is permanent magnet mechanism fixed structure.
Scheme 6: according to breaker described in any one of scheme 1-5, the Coupling Shaft is coaxially set with operation shaft It sets, the drive mechanism is the elastic cylindrical pin being arranged between Coupling Shaft and operation shaft.
Scheme 7: breaker according to scheme 6, the Manual circuit breaker device for permanent magnet mechanism further include for being fixed to Coupling Shaft installation set on the mechanism case of permanent magnet mechanism, Coupling Shaft rolling assembling is in Coupling Shaft installation set, Coupling Shaft installation set Outer cover is equipped with torsional spring, and two force sides of torsional spring are connect with elastic cylindrical pin and Coupling Shaft installation set respectively.
Scheme 8: breaker according to scheme 6, Coupling Shaft are arranged on door-plate, and elastic cylindrical pin is fixed on Coupling Shaft Or in operation shaft, another end face of Coupling Shaft and operation shaft, which is equipped with, to be axially embedded in for elastic cylindrical pin along Coupling Shaft Fluting.
Scheme 9: according to breaker described in scheme 8, one end of the separate operation shaft of Coupling Shaft is pierced by the door of mechanism case Plate, door-plate are equipped with the limited block cooperated with operation handle block.
The utility model has the advantages that the present invention is by adopting the above technical scheme, Manual circuit breaker device for permanent magnet mechanism further includes erection seat, shaft Hinged seat is fixed on erection seat, and erection seat is equipped with the mechanism case fixed knot being fixedly connected for the mechanism case with permanent magnet mechanism Structure;In this way, erection seat forms independent shaft hinged seat installation base body, convenient for guaranteeing structural strength, so that playing prevents shaft The problem of relative displacement, occurs for hinged seat, in addition, the Manual circuit breaker device for permanent magnet mechanism further includes the Coupling Shaft of rotation setting, It operates and is connected between shaft and Coupling Shaft by drive mechanism, by the way that Coupling Shaft is arranged, operation shaft can use shorter length Degree, the size of such shaft hinged seat also can be smaller, is more advantageous to the structural strength for guaranteeing shaft hinged seat installation base body, into And guarantee the stroke accuracy of operation shaft overhead cam, and avoid not resetting after the completion of operation shaft clamping stagnation or separating brake, it is required Separating brake external force is small, high reliablity.
Further, described device seat includes body supports plate and the bending support plate that body supports edges of boards edge is arranged in, It is easily manufactured using this plate form, it is at low cost, structure is simple.
Further, body supports plate is equipped with fixed block, and fixed block is located at the same of body supports plate with bending support plate Side, fixed block and corresponding bending support plate are equipped with shaft hinge hole, and the shaft hinged seat is turned by fixed block and being equipped with The bending support plate of axis hinge hole is constituted, the setting of fixed block so that body supports plate can be with fixed same of permanent magnet mechanism When, shorten the spacing of two hinged supports of operation shaft by the setting position of fixed block, further increases structural strength.
Further, the bending support plate equipped with shaft hinge hole has and is bonded for the mechanism chamber interior wall with permanent magnet mechanism More stable support construction can be collectively formed with mechanism chamber interior wall, better ensure that structural stability for the outside wall surface of cooperation.
Further, the body supports backboard is equipped with permanent magnet mechanism fixed structure to the side of the bending support plate, Body supports plate deforms even when being applied, and very big relative displacement will not occur in permanent magnet mechanism and shaft hinged seat, so as to Enough improve reliability.
Further, the Coupling Shaft and operation shaft coaxial arrangement, the drive mechanism are setting in Coupling Shaft and behaviour Make the elastic cylindrical pin between shaft, elastic cylindrical pin, which can rise, plays buffering work to the dynamic loading in separating brake and reseting procedure With impact of the mitigation to mechanism case improves reliability, prolong the service life.
Further, the Manual circuit breaker device for permanent magnet mechanism further includes for being fixed on the mechanism case of permanent magnet mechanism Coupling Shaft installation set, Coupling Shaft rolling assembling is in Coupling Shaft installation set, and Coupling Shaft installation set outer cover is equipped with torsional spring, torsional spring Two force sides are connect with elastic cylindrical pin and Coupling Shaft installation set respectively, and Coupling Shaft installation set is not only able to realize consolidating for Coupling Shaft It is fixed, additionally it is possible to avoid torsional spring from directly covering and be set in Coupling Shaft and the rotation flexibility of Coupling Shaft is had an impact, guarantee hand point It goes on smoothly.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of breaker in the present invention;
Fig. 2 is the side view in Fig. 1 at the cooperation of the motive spindle of cam and permanent magnet mechanism;
Fig. 3 is the structural schematic diagram of Manual circuit breaker device for permanent magnet mechanism in Fig. 1.
The corresponding title of each appended drawing reference in figure are as follows: 10- mechanism case, 11- tank wall, 12- door-plate, 13- limited block, 14- Support frame, 20- permanent magnet mechanism, 21- guide rod, 22- lower yoke cover board, 30- Manual circuit breaker device for permanent magnet mechanism, 31- erection seat, 311- body supports plate, 312- bend support plate, 313- fixed block, and 32- operates shaft, 33- cam, 34- fluting, 35- switching Axis, 40- Coupling Shaft installation set, 41- torsional spring, 42- operation handle, 421- limited block, 50- elastic cylindrical pin.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
One embodiment of breaker is as shown in Fig. 1 ~ Fig. 3 in the present invention, including the mechanism case 10 with door-plate 12, mechanism Permanent magnet mechanism 20 and Manual circuit breaker device for permanent magnet mechanism 30 are equipped in case 10.Permanent magnet mechanism 20 includes guide rod 21, i.e. movement master Axis.Manual circuit breaker device for permanent magnet mechanism 30 includes erection seat 31, operation shaft 32, cam 33, Coupling Shaft 35, Coupling Shaft installation set 40, torsional spring 41 and operation handle 42.
Wherein erection seat 31 includes body supports plate 311 and the bending support plate that 311 edge of body supports plate is arranged in 312, from angle shown in Fig. 1, the front side of body supports plate 311 and right edge are equipped with bending support plate 312, left side edge Not set bending support plate 312 forms opening.Body supports plate 311 passes through the bending support plate 312 and mechanism of front side and right side The tank wall 11 or support frame 14 of case 10 are connected and fixed, and bending support plate 312 has been formed simultaneously mechanism case fixed structure.Permanent magnet mechanism 20 lower yoke cover board 22 is fixed on 311 top of body supports plate, and 311 lower part of body supports plate is equipped with fixed block 313, fixed block 313 are respectively positioned on the downside of body supports plate 311 with bending support plate 312.On fixed block 313 and corresponding bending support plate 312 Equipped with shaft hinge hole, bending support plate 312 of the shaft hinged seat by fixed block 313 and equipped with shaft hinge hole is constituted.
The outer peripheral surface of Coupling Shaft installation set 40 is equipped with the shaft shoulder, is fixedly connected by the shaft shoulder with the door-plate 12 of mechanism case 10, The right end of Coupling Shaft 35 also is provided with the shaft shoulder, cooperates with the right side block of Coupling Shaft installation set 40.Operation shaft 32 is inserted in switching It in the slot being arranged on the right side of axis 35, and is sequentially connected by elastic cylindrical pin 50 and Coupling Shaft 35, forms drive mechanism. Elastic cylindrical pin 50 is fixed in Coupling Shaft 35, and the end face of operation shaft 32 is equipped with for elastic cylindrical pin 50 along 35 axis of Coupling Shaft To the fluting 34 of insertion, fluting 34 runs through the radial direction of operation shaft 32 and notch towards Coupling Shaft 35, convenient for the folding of door-plate 12.
40 outer cover of Coupling Shaft installation set be equipped with torsional spring 41, two force sides of torsional spring 41 respectively with elastic cylindrical pin 50 and turn Spindle installation set 40 connects.Coupling Shaft 35 is connected with operation handle 42 far from one end of operation shaft 32, consolidates in operation handle 42 Surely there is limited block 421, tank wall 11 is equipped with the limited block 13 with 421 block of the limited block cooperation in operation handle 42.Certainly, In other embodiments, limited block 421 can also be not provided in operation handle 42, make limited block 13 directly with operation handle 42 Main body block cooperation.
In the initial state, the limited block 421 in operation handle 42 is blocked by the block on door-plate 12, and torsional spring 41 has been at this time There is part pre compressed magnitude.The process of manual brake separating: counterclockwise turning operation handle 42, operation handle 42 drive 35 turns of Coupling Shaft It is dynamic, while elastic cylindrical pin 50 drives operation shaft 32 to rotate, during cam 33 rotates, cam 33 is applied to guide rod 21 Power when being greater than the static retention forces of permanent magnet mechanism 20, guide rod 21 drives dynamic iron core movement, completes separating brake.Meanwhile it operating In the rotation process of handle 42, torsional spring 41 carries out energy storage by elastic cylindrical pin 50, when separating brake completion, release handle, torsional spring 41 Energy release, handle drive operation shaft 32 to reset, block until limited block 421 is limited block 13.
In the above-described embodiments, erection seat 31 is plate bending structure, in other embodiments of the invention, erection seat 31 Also other forms, such as tower structure be could alternatively be.In addition, Coupling Shaft 35 is fixed on door-plate 12 in above-described embodiment, It operates and is sequentially connected between shaft 32 and Coupling Shaft 35 by the cooperation realization of elastic cylindrical pin 50 and fluting 34, it is compact-sized, Convenient for assembling maintenance, in other embodiments, the drive mechanism operated between shaft 32 and Coupling Shaft 35 also could alternatively be it His form, such as pass through shaft coupling connection, key connection etc..Furthermore in above-described embodiment, erection seat 31 passes through bending support plate 312 are fixedly connected with mechanism case 10, and in other embodiments, erection seat 31 can also be welded and fixed on mechanism case 10, or Support is set on 10 bottom wall of mechanism case, erection seat 31 is fixed on the support by bolt or screw.

Claims (8)

1. Manual circuit breaker device for permanent magnet mechanism, including the shaft hinged seat for operating shaft rolling assembling, it is characterised in that: also wrap Erection seat is included, the shaft hinged seat is fixed on erection seat, and erection seat is equipped with and fixes for the mechanism case with permanent magnet mechanism The mechanism case fixed structure of connection;The Manual circuit breaker device for permanent magnet mechanism further includes the Coupling Shaft of rotation setting, operates shaft It is connect between Coupling Shaft by drive mechanism, described device seat includes body supports plate and body supports edges of boards edge is arranged in Support plate is bent, body supports plate is equipped with fixed block, and fixed block and bending support plate are located at the same side of body supports plate, Gu Determine block and corresponding bending support plate is equipped with shaft hinge hole, the shaft hinged seat is by fixed block and is equipped with shaft hinge hole Bending support plate constitute.
2. Manual circuit breaker device for permanent magnet mechanism according to claim 1, it is characterised in that: the bending equipped with shaft hinge hole Support plate has the outside wall surface for the mechanism chamber interior wall close fit with permanent magnet mechanism.
3. Manual circuit breaker device for permanent magnet mechanism according to claim 1, it is characterised in that: the body supports backboard is to institute The side for stating bending support plate is equipped with permanent magnet mechanism fixed structure.
4. Manual circuit breaker device for permanent magnet mechanism described in any one according to claim 1-3, it is characterised in that: described turn Spindle and operation shaft coaxial arrangement, the drive mechanism are the elastic cylindrical pin being arranged between Coupling Shaft and operation shaft.
5. Manual circuit breaker device for permanent magnet mechanism according to claim 4, it is characterised in that: the permanent magnet mechanism manual brake separating Device further includes the Coupling Shaft installation set for being fixed on the mechanism case of permanent magnet mechanism, and Coupling Shaft rolling assembling is pacified in Coupling Shaft In encapsulation, Coupling Shaft installation set outer cover is equipped with torsional spring, and two force sides of torsional spring are installed with elastic cylindrical pin and Coupling Shaft respectively Set connection.
6. Manual circuit breaker device for permanent magnet mechanism according to claim 4, it is characterised in that: the mechanism case has door-plate, Door-plate is perpendicular to the axis of the operation shaft, and on door-plate, elastic cylindrical pin is solid along the radial direction of Coupling Shaft for Coupling Shaft setting It is scheduled on Coupling Shaft one end corresponding with operation shaft, is equipped in operation shaft one end corresponding with Coupling Shaft for elastic cylinder Sell the fluting being axially embedded in along Coupling Shaft, the fluting through operation shaft radial direction and notch towards Coupling Shaft.
7. Manual circuit breaker device for permanent magnet mechanism according to claim 6, it is characterised in that: the separate operation shaft of Coupling Shaft One end be pierced by the door-plate of mechanism case, door-plate is equipped with the limited block cooperated with operation handle block.
8. breaker, including mechanism case, mechanism case is interior to be equipped with permanent magnet mechanism and Manual circuit breaker device for permanent magnet mechanism, and feature exists In: the Manual circuit breaker device for permanent magnet mechanism is the dress of permanent magnet mechanism manual brake separating described in any one in claim 1-7 It sets.
CN201611028731.2A 2016-11-22 2016-11-22 Manual circuit breaker device for permanent magnet mechanism and the breaker for using the device Active CN106531572B (en)

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CN201611028731.2A CN106531572B (en) 2016-11-22 2016-11-22 Manual circuit breaker device for permanent magnet mechanism and the breaker for using the device

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Application Number Priority Date Filing Date Title
CN201611028731.2A CN106531572B (en) 2016-11-22 2016-11-22 Manual circuit breaker device for permanent magnet mechanism and the breaker for using the device

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CN106531572B true CN106531572B (en) 2019-04-05

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530414A (en) * 1969-02-26 1970-09-22 Westinghouse Electric Corp Circuit breaker with improved trip means
CN201207340Y (en) * 2008-04-23 2009-03-11 中国电力科学研究院 Manual circuit breaker device for permanent magnet mechanism
CN203536276U (en) * 2013-10-21 2014-04-09 苏州科陆东自电气有限公司 Hand-operated switch-on device
CN103903920A (en) * 2014-04-08 2014-07-02 北京双杰电气股份有限公司 Hand-operated opening device used for permanent magnetic mechanism
CN204516700U (en) * 2015-03-19 2015-07-29 河南华盛隆源电气有限公司 A kind of Manual circuit breaker device for permanent magnet mechanism
CN205564627U (en) * 2016-04-28 2016-09-07 成都民达电力设备有限公司 Permanent magnetism operating device's manual minute brake gear

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530414A (en) * 1969-02-26 1970-09-22 Westinghouse Electric Corp Circuit breaker with improved trip means
CN201207340Y (en) * 2008-04-23 2009-03-11 中国电力科学研究院 Manual circuit breaker device for permanent magnet mechanism
CN203536276U (en) * 2013-10-21 2014-04-09 苏州科陆东自电气有限公司 Hand-operated switch-on device
CN103903920A (en) * 2014-04-08 2014-07-02 北京双杰电气股份有限公司 Hand-operated opening device used for permanent magnetic mechanism
CN204516700U (en) * 2015-03-19 2015-07-29 河南华盛隆源电气有限公司 A kind of Manual circuit breaker device for permanent magnet mechanism
CN205564627U (en) * 2016-04-28 2016-09-07 成都民达电力设备有限公司 Permanent magnetism operating device's manual minute brake gear

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