CN209859903U - Safety hydraulic electromagnetic circuit breaker - Google Patents
Safety hydraulic electromagnetic circuit breaker Download PDFInfo
- Publication number
- CN209859903U CN209859903U CN201921048494.5U CN201921048494U CN209859903U CN 209859903 U CN209859903 U CN 209859903U CN 201921048494 U CN201921048494 U CN 201921048494U CN 209859903 U CN209859903 U CN 209859903U
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- circuit breaker
- contact
- movable contact
- hinge
- elastic
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Abstract
The utility model provides a safe type hydraulic pressure electromagnetic circuit breaker belongs to the circuit breaker and makes technical field. It has solved the current low scheduling problem of breaking speed. This safe type hydraulic pressure electromagnetism circuit breaker includes the casing, is equipped with incoming wire terminal and terminal outgoing lines on the casing, is equipped with electromagnetic drive mechanism between incoming wire terminal and the terminal outgoing lines, and electromagnetic drive mechanism includes around locating the induction coil on the time delay pipe, and on the installation frame was located to the time delay pipe, still included tripping device, armature and hand brake, the installation frame was respectively through fourth articulated elements, fifth articulated elements and armature etc.. This safe type hydraulic pressure electromagnetic circuit breaker's advantage lies in: the breaking time in the breaking process is reduced, and the breaking capacity of the product can be improved; in addition, due to the non-rebounding structural design, the problem of secondary electrification can be solved in the breaking process of the circuit breaker, the breaking capacity is improved, and meanwhile, the safety and the reliability of the circuit breaker can be improved.
Description
Technical Field
The utility model belongs to the technical field of the circuit breaker is made, especially, relate to a safe type hydraulic pressure electromagnetic circuit breaker.
Background
As shown in fig. 1 and 2, the working principle of the existing hydraulic electromagnetic circuit breaker is as follows: because the existing moving contact 1 'is directly hinged with the mounting frame 3' through the first hinged shaft 2 'and then hinged with the tripping mechanism 5' through the second hinged shaft 4 ', the moving contact 1' cannot rotate around the second hinged shaft 4 'due to the structural arrangement, even if the moving contact 1' and the static contact 6 'generate mutually repulsive electric force due to opposite current directions, the moving contact 1' cannot rotate, and the current directions flowing through the moving contact 1 'and the static contact 6' are the same, only when the current flows through the induction coil 7 ', the induction coil 7' generates electromagnetic attraction to attract the armature 8 ', so as to drive the tripping mechanism 5' to finally realize unlocking, separate the moving contact 1 'and the static contact 6' to realize the current disconnection protection effect, and thus, the circuit breaker can be powered off only through a series of unlocking actions, fig. 3 shows breaking test data of the conventional hydraulic electromagnetic circuit breaker, wherein breaking time is more than 10 milliseconds, and breaking speed is critical to equipment property and related user life connected into the power system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, provide a reasonable in design, solve current electromagnetic circuit breaker when having short-circuit current to flow through, will make the safe type hydraulic pressure electromagnetic circuit breaker of the long problem of moving contact and the static contact that closes mutually in it separately required time.
In order to achieve the above purpose, the utility model adopts the following technical proposal: the utility model discloses a safe type hydraulic pressure electromagnetic circuit breaker, which comprises a housin, be equipped with incoming line terminal and leading-out terminal on the casing, be equipped with electromagnetic drive mechanism between incoming line terminal and the leading-out terminal, electromagnetic drive mechanism includes around locating the induction coil on the time delay pipe, the time delay pipe is located on the installation frame, still include tripping device, armature and hand brake, the installation frame is respectively through the fourth articulated elements, fifth articulated elements and armature, the hand brake is articulated, tripping device passes through the third articulated elements with the hand brake and articulates, tripping device still articulates through first articulated elements and moving contact, be equipped with the moving contact on the moving contact, be equipped with the stationary contact on the stationary contact, moving contact and stationary contact cooperation, its characterized in that: the current direction flowing through the fixed contact is opposite to the current direction flowing through the movable contact, an elastic expansion piece which is used for applying force to the movable contact when the circuit breaker is switched on and is used for enabling the movable contact to be abutted against the fixed contact is arranged between the mounting frame and the movable contact, a supporting piece is arranged between the mounting frame and the elastic expansion piece and connected with the mounting frame through a second hinge piece, and the supporting piece, a tripping mechanism and the movable contact are hinged to the first hinge piece together to support the first hinge piece; and the fourth articulated element and the fifth articulated element are respectively provided with an elastic resetting element.
In the above-mentioned safe hydraulic electromagnetic circuit breaker, the electromagnetic transmission mechanism further includes an elastic clamping seat disposed on the housing, and when the circuit breaker is switched on, the elastic clamping seat is in clamping fit with a moving contact which is pushed by an electric repulsive force due to an inflow short-circuit current so as to rotate around the first hinge member to a direction away from the fixed contact, so as to prevent the rotating moving contact from rotating.
In foretell safe type hydraulic pressure electromagnetic circuit breaker, the moving contact is two segmentation structures, include when closing a floodgate, with static contact matched with horizontal segment and be the slope downwards and to the slope section of installing the frame direction extension, the slope section takes place rotation and elasticity joint seat block under the effect of electronic repulsion when flowing into short-circuit current.
In the above-mentioned safe hydraulic electromagnetic circuit breaker, the elastic clamping seat includes a mounting plate and an elastic clamping member, one end of the elastic clamping member is connected to the mounting plate, the other end is a free end in a suspended arrangement, and the free end is clamped with the moving contact in rotation to prevent the moving contact from rotating.
In the safe hydraulic electromagnetic circuit breaker, the elastic clamping piece is arranged upwards in an inclined manner along the direction of the moving contact; the elastic clamping piece is arranged in an arc shape.
In the above-mentioned safe type hydraulic pressure electromagnetic circuit breaker, the free end of the elastic clamping piece is the slope and sets up downwards, and this slope is down the department and moving contact block.
In the above-mentioned safety hydraulic electromagnetic circuit breaker, the second hinge is also provided with an elastic reset element.
In the safety hydraulic electromagnetic circuit breaker, an arc striking angle is arranged between the static contact and the static contact, and an arc extinguishing block is arranged on one side of the moving contact on which the moving contact is arranged.
Compared with the prior art, this safe type hydraulic pressure electromagnetic circuit breaker's advantage lies in:
1. the direction of current flowing through the fixed contact is opposite to the direction of current flowing through the moving contact, so that electric repulsion can be generated, and the first hinge part, the second hinge part, the moving contact, the support part and the elastic telescopic part form a four-link action mechanism; in addition, the breaker has a non-rebounding structural design, namely the arrangement of the elastic clamping seat can ensure that the problem of secondary electrification can not occur in the breaking process of the breaker, and the safety and the reliability of the breaker can be improved while the breaking capacity is improved;
2. meanwhile, the action mode of the circuit breaker for overload protection is that the current is small, and the generated electric repulsion force is not enough to offset the pulling force of the elastic expansion piece acting on the moving contact, so that in the overload protection process, the action mode of the internal mechanism of the circuit breaker also utilizes the electromagnetic force generated by the induction coil to attract the armature iron to unlock the tripping mechanism of the armature iron so as to realize the opening process of the circuit breaker
3. The design is only aiming at the quick response capability of the circuit breaker when meeting high current (short-circuit current), and when normal manual opening and closing or overload opening are carried out, the moving contact is pulled by the elastic expansion piece and cannot rotate at a large angle, and the moving contact is not clamped with the elastic clamping seat.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 provides a schematic structural diagram of a conventional hydraulic electromagnetic circuit breaker during closing.
Fig. 2 provides a schematic structural diagram of a conventional hydraulic electromagnetic circuit breaker during opening.
Fig. 3 provides a breaking test oscillogram of the existing hydraulic electromagnetic circuit breaker.
Fig. 4 is a schematic structural diagram of a state in which the electromagnetic transmission mechanism located in the housing in the embodiment of the present invention has a short-circuit current flowing in the moving contact and the static contact, but when the short-circuit current does not flow in the induction coil yet, the moving contact is pushed away by the electric repulsive force to rotate and then is engaged with the elastic latch holder.
Fig. 5 is a schematic structural diagram of a state when the rated current is applied during normal closing in an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a state in which the moving contact is repelled by an electric repulsive force and engaged with the elastic clip holder when a short-circuit current flows into the moving contact according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a state of the induction coil in an embodiment of the present invention when a short-circuit current flows through the induction coil, the electromagnetic attraction is generated to attract the armature down, and the tripping mechanism is unlocked.
Fig. 8 is a schematic structural diagram of a state in which, after the short-circuit current flowing through the induction coil disappears, each component is reset to the opening state position by the elastic reset force in the embodiment of the present invention.
Fig. 9 provides an exploded view of the electromagnetic transmission mechanism in an embodiment of the present invention.
Fig. 10 provides a schematic structural diagram of a flow direction of current flowing through the fixed contact and the movable contact when the switch is switched on in an embodiment of the present invention.
In the figure, the movable contact 1 ', the first hinge shaft 2', the mounting frame 3 ', the second hinge shaft 4', the trip mechanism 5 ', the fixed contact 6', the induction coil 7 ', the armature 8', the housing 1, the incoming line terminal 2, the outgoing line terminal 3, the electromagnetic transmission mechanism 4, the delay tube 401, the induction coil 402, the mounting frame 403, the trip mechanism 404, the armature 405, the hand brake 406, the fourth hinge 407, the fifth hinge 408, the third hinge 409, the first hinge 410, the movable contact 411, the horizontal segment 4111, the inclined segment 4112, the wing 4113, the movable contact 412, the fixed contact 413, the fixed contact 414, the elastic telescopic element 415, the support 416, the second hinge 417, the elastic reset element 418, the elastic clamping seat 419, the mounting plate 4191, the elastic clamping element 4192, the arc striking angle 420, the arc extinguishing block 421, and the conducting wire 5.
Detailed Description
As shown in fig. 4 to 10, the embodiment of the safety type hydraulic electromagnetic circuit breaker includes, but is not limited to, the following examples.
Example 1
The safety hydraulic electromagnetic circuit breaker comprises a shell 1, wherein a wire inlet terminal 2 and a wire outlet terminal 3 are arranged on the shell 1, an electromagnetic transmission mechanism 4 is arranged between the wire inlet terminal 2 and the wire outlet terminal 3, the electromagnetic transmission mechanism 4 comprises an induction coil 402 wound on a delay tube 401, the delay tube 401 is arranged on an installation frame 403, the safety hydraulic electromagnetic circuit breaker further comprises a tripping mechanism 404, an armature 405 and a hand brake 406, the installation frame 403 is hinged with the armature 405 and the hand brake 406 through a fourth hinge 407 and a fifth hinge 408 respectively, the tripping mechanism 404 is hinged with the hand brake 406 through a third hinge 409, the tripping mechanism 404 is further hinged with a moving contact 411 through a first hinge 410, the moving contact 411 is provided with a moving contact 412, the moving contact 414 is arranged on the fixed contact 413, the moving contact 412 is matched with the fixed contact 413, the direction of current flowing through the fixed contact 413 is opposite to the direction of current flowing through the moving contact 411, and a part for applying to the moving contact 411 when the circuit breaker is switched An elastic expansion piece 415 of the force that the fixed contact 413 abuts against is provided with a support 416 between the mounting frame 403 and the elastic expansion piece 415, the support 416 is connected with the mounting frame 403 through a second hinge 417, and the support 416 is further hinged to the first hinge 410 together with the trip mechanism 404 and the movable contact 411 to support the first hinge 410. Because the direction of the current flowing through the fixed contact 413 is opposite to the direction of the current flowing through the movable contact 411, a large electric repulsion force is generated when the short-circuit current flows, the electric repulsion force is enough to push the movable contact 411, and a four-bar linkage action mechanism is formed by the first hinge 410, the second hinge 417, the movable contact 411, the support 416 and the elastic expansion piece 415, so that when the short-circuit current flows through the fixed contact 413 and the movable contact 411, the electric repulsion force is generated to push the movable contact 411 open first, the movable contact 411 rotates around the first hinge 410 along the direction away from the fixed contact 413, so that when the short-circuit current flows through, the fixed contact 414 on the fixed contact 413 and the movable contact 412 on the movable contact 411 can be separated first, at this time, the short-circuit current can continuously flow forward and flow into the induction coil 402, the induction coil 402 can generate electromagnetic attraction to attract the, the attracted armature 405 drives the tripping mechanism 404 to unlock so as to enable the moving contact 411 to be further away from the fixed contact 413 until reaching the limit position, and in addition, when the circuit breaker is switched on, the elastic expansion piece 415 applies a force to enable the moving contact 411 to be close to the fixed contact 413, so that the matching force between the moving contact 412 on the moving contact 411 and the fixed contact 414 on the fixed contact 413 is improved.
Specifically, as shown in fig. 10, the structure causing the direction of the current flowing through the fixed contact 413 to be opposite to the direction of the current flowing through the movable contact 411 may be that the fixed contact 414 on the fixed contact 413 and the movable contact 412 on the movable contact 411 are disposed near the inlet terminal 2, and the lead 5 led out from the inlet terminal 2 is connected to an end of the fixed contact 413 far from the fixed contact 414, but is not limited to the above structure.
Additionally, the elastic extension 415 may be, but is not limited to, a tension spring.
Preferably, the movable contact 411 is provided with a pair of wings 4113, and the movable contact 411 is connected to the trip mechanism 404 and the elastic expansion member 415 through the pair of wings 4113, respectively, so that the movable contact 411 can rotate better.
In addition, the elastic reset member 418 is disposed on each of the fourth hinge 407 and the fifth hinge 408, and the elastic reset member 418 is disposed to reset each component to the open state position by the elastic deformation force after the short circuit current disappears, and preferably, the elastic reset member 418 is disposed on the second hinge 417 to enhance the resetting capability of the support 416 on the induction coil 402 after the short circuit current disappears, even if the support 416 is reset to the open state position.
Additionally, here, the resilient return member 418 may be, but is not limited to, a return spring.
Preferably, an arc striking angle 420 is arranged between the fixed contact 414 and the fixed contact 413, and an arc extinguishing block 421 is arranged on one side of the movable contact 411 on which the movable contact 412 is arranged. The arc striking angle 420 and the arc extinguishing block 421 are arranged to extinguish the electric spark which may be generated between the fixed contact 414 and the movable contact 412 during the operation of the circuit breaker, thereby improving the safety of the use.
Example 2
This embodiment is substantially the same as embodiment 1 except that: the electromagnetic transmission mechanism 4 further includes an elastic clamping seat 419 disposed on the housing 1, and when the switch is closed, the elastic clamping seat 419 is in clamping fit with the moving contact 411, which is pushed by the electric repulsive force due to the flowing of the short-circuit current, so as to rotate around the first hinge 410 to a direction away from the fixed contact 413, so as to prevent the rotating moving contact 411 from rotating. Because the armature 405 is not yet attracted by the induction coil 402 after the moving contact 411 rotates away from the fixed contact 413 by the electric repulsive force, the trip mechanism 404 cannot be unlocked by the armature 405, and at this time, if the electric repulsive force becomes small, the moving contact 411 may rotate, so that the moving contact 412 on the moving contact 411 and the fixed contact 414 on the fixed contact 413 are combined again, which may cause danger, and after the elastic clamping seat 419 is arranged, only after the trip mechanism 404 is unlocked, the moving contact 411 can be restored to the original position where the hand brake 406 is located when being opened, thereby improving the safety.
Preferably, the movable contact 411 has a two-section structure, and includes a horizontal section 4111 matched with the fixed contact 413 and an inclined section 4112 inclined downward and extending toward the mounting frame 403 when the switch is turned on, and the inclined section 4112 rotates under the action of electric repulsion force when a short-circuit current flows into the inclined section and is engaged with the elastic engaging seat 419. The inclined section 4112 is disposed to engage with the elastic engaging seat 419 more quickly after the moving contact 411 rotates under the electric repulsive force.
In addition, the elastic clamping seat 419 includes an installation plate 4191 and an elastic clamping piece 4192, one end of the elastic clamping piece 4192 is connected to the installation plate 4191, and the other end is a free end in a suspended arrangement, and the free end is clamped with the moving contact 411 in rotation to prevent the moving contact 411 from rotating. The elastic latch 4192 may be one or several in parallel, so as to increase the contact area between the elastic latch 4192 and the movable contact 411.
Specifically, the elastic latches 4192 may be a flexible strip-shaped structure with a small width, and may be one or more in number, or may be a sheet-shaped structure, but is not limited to the above-mentioned structure.
Additionally, the elastic clamping piece 4192 is arranged obliquely upwards along the direction of the movable contact 411, so that the movable contact 411 can be better clamped with the movable contact; the elastic clamping piece 4192 is arranged in an arc shape to reduce the loss of the moving contact 411 due to collision in the clamping process, and prolong the service life of the moving contact.
Additionally, the free end of the elastic clamping piece 4192 is arranged obliquely downwards, and the obliquely downwards part is clamped with the moving contact 411, so that the area of a clamping part is increased, and the clamping strength and stability are improved.
The working principle is as follows: as shown in fig. 4 and 6, when a short-circuit current flows from the incoming line terminal 2 through the movable contact 411 and the fixed contact 413 but does not flow to the induction coil 402, the direction of the current flowing through the movable contact 411 is opposite to the direction of the current flowing through the fixed contact 413, so that an electric repulsion force is generated, the movable contact 411 is subjected to the electric repulsion force, and is quickly repelled prior to the unlocking action of the tripping mechanism 404, so that the movable contact 412 and the fixed contact 413 are separated and finally clamped with the elastic clamping piece 4192 on the elastic clamping seat 419; as shown in fig. 6 and fig. 7, when the short-circuit current on the circuit breaker continues to flow and flows into the induction coil 402, the induction coil 402 generates an electromagnetic attraction force, attracts the armature 405 to unlock the trip mechanism 404, and at this time, the moving contact 411, which was previously repelled, continues to increase the electrical gap with the stationary contact 413 by the spring tension, and reaches the limit value; as shown in fig. 8, after the short-circuit current on the induction coil 402 disappears, the hand brake 406 and the components are restored to the open state by the action of the spring force, and wait for the next reclosing power.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the moving contact 1 ', the first hinge shaft 2', the mounting frame 3 ', the second hinge shaft 4', the trip mechanism 5 ', the static contact 6', the induction coil 7 ', the armature 8', the housing 1, the incoming line terminal 2, the outgoing line terminal 3, the electromagnetic transmission mechanism 4, the delay tube 401, the induction coil 402, the mounting frame 403, the trip mechanism 404, the armature 405, the hand brake 406, the fourth hinge 407 and the fifth hinge 408 are more commonly used, the terms of the third hinge 409, the first hinge 410, the movable contact 411, the horizontal segment 4111, the inclined segment 4112, the wing 4113, the movable contact 412, the fixed contact 413, the fixed contact 414, the elastic telescopic member 415, the support 416, the second hinge 417, the elastic reset member 418, the elastic clamping seat 419, the mounting plate 4191, the elastic clamp 4192, the arc striking angle 420, the arc extinguishing block 421, the wire 5, etc., but do not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (8)
1. The safety hydraulic electromagnetic circuit breaker comprises a shell (1), wherein a wire inlet terminal (2) and a wire outlet terminal (3) are arranged on the shell (1), an electromagnetic transmission mechanism (4) is arranged between the wire inlet terminal (2) and the wire outlet terminal (3), the electromagnetic transmission mechanism (4) comprises an induction coil (402) wound on a delay tube (401), the delay tube (401) is arranged on an installation frame (403), the safety hydraulic electromagnetic circuit breaker further comprises a tripping mechanism (404), an armature (405) and a hand brake (406), the installation frame (403) is hinged through a fourth hinge piece (407), a fifth hinge piece (408), the armature (405) and the hand brake (406), the tripping mechanism (404) is hinged with the hand brake (406) through a third hinge piece (409), the tripping mechanism (404) is hinged with a movable contact (411) through a first hinge piece (410), the moving contact (411) on be equipped with moving contact (412), be equipped with stationary contact (414) on stationary contact (413), moving contact (412) and stationary contact (413) point cooperation, its characterized in that: the direction of current flowing through the fixed contact (413) is opposite to the direction of current flowing through the movable contact (411), an elastic expansion part (415) used for applying force to the movable contact (411) to enable the movable contact to be abutted against the fixed contact (413) when the circuit breaker is switched on is arranged between the mounting frame (403) and the movable contact (411), a supporting part (416) is arranged between the mounting frame (403) and the elastic expansion part (415), the supporting part (416) is connected with the mounting frame (403) through a second hinge part (417), and the supporting part (416), the tripping mechanism (404) and the movable contact (411) are hinged to the first hinge part (410) together to support the first hinge part (410); and the fourth hinging piece (407) and the fifth hinging piece (408) are respectively provided with an elastic resetting piece (418).
2. The safety hydraulic electromagnetic circuit breaker according to claim 1, wherein the electromagnetic transmission mechanism (4) further includes an elastic clamping seat (419) disposed on the housing (1), and when the circuit breaker is closed, the elastic clamping seat (419) is clamped and engaged with the movable contact (411) that is pushed by an electric repulsive force due to an inflow of a short-circuit current so as to rotate around the first hinge (410) to a direction away from the fixed contact (413), so as to prevent the movable contact (411) from rotating.
3. The safety hydraulic electromagnetic circuit breaker according to claim 2, wherein the movable contact (411) has a two-segment structure, and includes a horizontal segment (4111) that is matched with the fixed contact (413) and an inclined segment (4112) that is inclined downward and extends toward the mounting frame (403) when the switch is switched on, and the inclined segment (4112) rotates under the action of electric repulsion force to be engaged with the elastic engaging seat (419) when the short-circuit current flows.
4. The safety hydraulic electromagnetic circuit breaker according to claim 2, characterized in that the elastic clamping seat (419) comprises a mounting plate (4191) and an elastic clamping piece (4192), one end of the elastic clamping piece (4192) is connected to the mounting plate (4191), the other end is a free end in a suspended arrangement, and the free end is clamped with the moving contact (411) in rotation to prevent the moving contact (411) from rotating.
5. The safety hydraulic electromagnetic circuit breaker according to claim 4, characterized in that the resilient catch (4192) is disposed obliquely upward along the direction of the movable contact (411); the elastic clamping piece (4192) is arranged in an arc shape.
6. The safety hydraulic electromagnetic circuit breaker according to claim 5, characterized in that the free end of the resilient catch (4192) is arranged obliquely downwards, and the obliquely downwards portion is engaged with the movable contact (411).
7. The safety hydraulic electromagnetic circuit breaker according to any of claims 2 to 6, characterized in that the second hinge member (417) is also provided with an elastic return member (418).
8. The safety hydraulic electromagnetic circuit breaker according to claim 7, characterized in that an arc striking angle (420) is provided between the fixed contact (414) and the fixed contact (413), and an arc extinguishing block (421) is provided on one side of the movable contact (412) on the movable contact (411).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921048494.5U CN209859903U (en) | 2019-07-05 | 2019-07-05 | Safety hydraulic electromagnetic circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921048494.5U CN209859903U (en) | 2019-07-05 | 2019-07-05 | Safety hydraulic electromagnetic circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209859903U true CN209859903U (en) | 2019-12-27 |
Family
ID=68942943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921048494.5U Withdrawn - After Issue CN209859903U (en) | 2019-07-05 | 2019-07-05 | Safety hydraulic electromagnetic circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209859903U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211850A (en) * | 2019-07-05 | 2019-09-06 | 浙江百事宝电器股份有限公司 | Safety-type hydraulic electromagnetic circuit breaker and method for dividing |
-
2019
- 2019-07-05 CN CN201921048494.5U patent/CN209859903U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211850A (en) * | 2019-07-05 | 2019-09-06 | 浙江百事宝电器股份有限公司 | Safety-type hydraulic electromagnetic circuit breaker and method for dividing |
| CN110211850B (en) * | 2019-07-05 | 2024-04-30 | 浙江百事宝电器股份有限公司 | Safety hydraulic electromagnetic circuit breaker and breaking method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191227 Effective date of abandoning: 20240430 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191227 Effective date of abandoning: 20240430 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |