CN109326494B - Time delay tripping circuit breaker based on motion inertia - Google Patents
Time delay tripping circuit breaker based on motion inertia Download PDFInfo
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- CN109326494B CN109326494B CN201811349380.4A CN201811349380A CN109326494B CN 109326494 B CN109326494 B CN 109326494B CN 201811349380 A CN201811349380 A CN 201811349380A CN 109326494 B CN109326494 B CN 109326494B
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- connecting rod
- iron core
- movable iron
- inertia
- delay mechanism
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 45
- 230000003111 delayed effect Effects 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000001012 protector Effects 0.000 description 14
- 230000001052 transient effect Effects 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000001934 delay Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
- H01H71/446—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay making use of an inertia mass
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Breakers (AREA)
Abstract
The invention discloses a time delay tripping circuit breaker based on motion inertia, which comprises a wire inlet end, a tripping mechanism, a time delay mechanism, a contact head, a wire outlet end and an electromagnet with an electromagnet coil and a movable iron core, wherein the wire inlet end, the contact head and the electromagnet coil and the wire outlet end of the electromagnet form a main circuit; the movable iron core comprises a connecting rod arranged along the linear motion direction of the movable iron core, the delay mechanism is provided with motion inertia, the delay mechanism is associated with the connecting rod, when the connecting rod moves along the linear motion, the delay mechanism is pulled to move, and the kinetic energy of the movable iron core is reduced due to the fact that part of the kinetic energy is converted into the motion inertia of the delay mechanism, so that the movable iron core is delayed to move. The delay mechanism of the delay tripping circuit-breaking relay has motion inertia, and the time required by the action of the movable iron core to strike the tripping mechanism is prolonged through the additional motion inertia, so that the effect of delay tripping is achieved.
Description
Technical Field
The invention relates to the field of lightning protection, in particular to a time delay tripping circuit breaker based on motion inertia.
Background
Surge Protector (SPD) has been widely used in various industries such as telecommunications, electric power, railway, airport, petrochemical industry, industrial and civil construction, etc. The parameters of the matched fuse and the breaker can not be matched with the SPD in a coordinated way, which is a problem which is difficult to solve in the lightning protection industry.
The fuse or the breaker is used for the standby overcurrent protection of the SPD at home and abroad, and the two devices are always larger in order to ensure that the value is not broken when the lightning impulse current arrives. When the SPD is degraded or the power supply is abnormal, power frequency current (commonly called afterflow) flows in, and the fuse or the circuit breaker cannot cut off the circuit rapidly, so that the SPD fires and burns. When the quick breaking values of the two protection devices are smaller, the lightning impulse current can cause quick breaking so as to lead the lightning protection to lose effectiveness.
In order to solve the problem that lightning current does not malfunction through, the matching problem of a fuse, a breaker and an SPD is specially researched, and the technical problem is solved by SCB (SCB-Surge Protector Device Circuit Breaker external disconnector) products. The SCB comprises a wire inlet terminal, a wire outlet terminal, a tripping mechanism, an electromagnet, a fixed contact and a movable contact, wherein the wire inlet terminal, the fixed contact, the movable contact, an electromagnet coil of the electromagnet and the wire outlet terminal are connected in series to form a main circuit, when the main circuit passes through a short circuit, the short circuit current generates electromagnetic force through the electromagnet coil and pushes a movable iron core of the electromagnet to strike the tripping mechanism, so that the fixed contact and the movable contact are separated, the tripping action is completed, and the main circuit is disconnected. However, in industries such as steel, wind power, railway and the like, power frequency transient overvoltage often occurs in a power frequency power supply, so that SCB misoperation is caused.
In order to solve the problem of SCB misoperation, people are focused on researching various types of delay tripping circuit breakers, the power frequency transient overvoltage is restrained through delay triggering, the delay tripping circuit breaking effect is generally generated through a delay circuit, and a mechanical delay mechanism is added from the outside of an electromagnet to influence the movement of an electromagnet movable iron core.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention is to provide a delay trip circuit breaker capable of resisting transient overvoltage interference, which delays the action of the moving iron core of the electromagnet to generate a delay trip by providing a mechanical delay mechanism outside the electromagnet.
In order to achieve the above purpose, the invention provides a time delay tripping circuit breaker based on motion inertia, which comprises a wire inlet end, a tripping mechanism, a time delay mechanism, a contact head, a wire outlet end and an electromagnet with an electromagnet coil and a movable iron core, wherein the wire inlet end, the contact head, the electromagnet coil and the wire outlet end of the electromagnet form a main circuit, and when the electromagnet coil passes through a power frequency short-circuit current, the movable iron core of the electromagnet acts to strike the tripping mechanism so as to break the contact head; the movable iron core comprises a connecting rod arranged along the linear motion direction of the movable iron core, the delay mechanism is provided with motion inertia, the delay mechanism is associated with the connecting rod, when the connecting rod moves along the linear motion, the delay mechanism is pulled to move, and the kinetic energy of the movable iron core is reduced due to the fact that part of the kinetic energy is converted into the motion inertia of the delay mechanism, so that the movable iron core is delayed to move.
Further, the delay mechanism has a rotational moment of inertia.
Further, the time delay mechanism comprises an inertia wheel, a spiral track is arranged on the surface of the connecting rod along the axial direction, a through hole is formed in the axis of the inertia wheel, a spiral protrusion is arranged in the through hole and sleeved on the connecting rod through the through hole, the spiral protrusion is matched with the spiral track, the position of the inertia wheel along the axial direction of the connecting rod is fixedly restrained, and when the connecting rod moves along a straight line, the inertia wheel can slide relative to the connecting rod and rotate under the action of the spiral track.
Further, 2 spiral bulges which are 180 degrees opposite to each other along the axial direction are arranged in the through hole, and 2 spiral tracks which are 180 degrees opposite to each other along the axial direction are arranged on the connecting rod corresponding to the through hole. Which contributes to the stability of the flywheel movement.
Further, the delay mechanism comprises a gear mechanism and a flywheel connected with the gear mechanism, and the flywheel can rotate under the linkage of the gear mechanism, so that the delay mechanism has rotational moment of inertia; the outside of connecting rod forms the rack, gear with the rack meshing, when the connecting rod along rectilinear movement, drive gear through the rack and move, and then drive the flywheel rotation.
Further, the gear mechanism is a single gear or a multi-gear speed increasing mechanism; the flywheel under the adoption of the multi-gear speed increasing mechanism is lighter, and the rotating speed is faster.
Further, the time delay mechanism comprises a pendulum bob, the pendulum bob comprises a swinging rod and a hammer body connected with the swinging rod, the swinging rod is pivoted to a fixed point, a first connecting point is arranged at one end, far away from the hammer body, of the swinging rod, the connecting rod is connected with the swinging rod, and when the connecting rod moves along a straight line, the pendulum bob is pulled to swing through the connecting rod.
Further, the delay mechanism has linear motion inertia.
Further, the time delay mechanism comprises a heavy hammer; the heavy hammer is fixedly connected to the connecting rod, and when the connecting rod moves along a straight line, the heavy hammer is driven to move in the same direction.
Compared with the existing delay tripping circuit breaker, the delay mechanism of the delay tripping circuit breaker has the motion inertia, and the time required by the action of the movable iron core to strike the tripping mechanism is prolonged through the additional motion inertia, so that the effect of delay tripping is achieved.
Drawings
FIG. 1 is a schematic circuit diagram of a preferred embodiment of the present invention;
FIG. 2 is a first embodiment of the delay mechanism of the present invention;
FIG. 3 is a schematic partial cross-sectional view of a first embodiment of the delay mechanism of the present invention;
FIG. 4 is a second embodiment of the delay mechanism of the present invention;
FIG. 5 is a third embodiment of the delay mechanism of the present invention;
fig. 6 is a fourth embodiment of the delay mechanism of the present invention.
Wherein: 1-an electromagnet; 2-tripping mechanism; 3-indicator; 4-wire inlet end; 5-a circuit breaker; 6-contact point; 7-a closing spanner; 8-an electromagnet coil; 9-a surge protection assembly; 10-a surge protector; 11-wire outlet end; 12-a delay mechanism; 13-connecting rods; 14-inertia wheel; 15-through holes; 16-helical protrusions; 17-helical track; 18-rack; 19-a gear mechanism; 19 a-primary gear; 19 b-a step-up gear set; 19 c-flywheel; 20-pendulum bob; 20 a-swinging rod and 20 b-hammer body; 21-pivot point, 22-connection point; 23-heavy hammer.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The invention will now be further described with reference to the drawings and detailed description.
Fig. 1 shows a schematic circuit diagram of a combined application of a circuit breaker and a surge protector, comprising a circuit breaker 5 and a surge protector 10, wherein the circuit breaker 5 comprises a wire inlet end 4, an electromagnet 1, a tripping mechanism 2, an indicator 3, a contact point 6, a closing wrench 7 and a wire outlet end 11, and the electromagnet 1 comprises an electromagnet coil 8 and a movable iron core; a zinc oxide piezoresistor 9 as a core device is arranged in the surge protector 10; the wire inlet end 4, the contact point 6, the electromagnet coil 8 and the wire outlet end 11 form a protection main circuit; the incoming line end 4 is connected to a power frequency power supply to be protected, and the outgoing line end 11 is connected to a protection ground PE through a surge protector 10. The zinc oxide piezoresistor 9 has self-healing capability under the short-circuit current of a certain time; however, in the case of a long-term short circuit, heat generation and combustion occur, which causes a risk. The breaker 5 provides trip protection for the surge protector 10, and does not trip when the surge protector 10 has self-healing capacity, so that the surge protector 10 can provide overvoltage and overcurrent protection for a power frequency power supply connected with the wire inlet end 4; and the surge protector 10 is disconnected in time before the surge protector 10 is overheated, so as to provide tripping protection for the surge protector 10. When the electromagnet coil 8 passes through the power frequency short-circuit current, the movable iron core of the electromagnet 1 acts to strike the tripping mechanism 2 to break the contact head 6, so as to finish the tripping of the surge protector 10. In order to overcome the misoperation of the circuit breaker caused by the power frequency transient overvoltage of a power frequency power supply, a mechanical time delay mechanism 12 is added outside the electromagnet 1. A connecting rod 14 is arranged on the movable iron core of the electromagnet 1 along the linear motion direction of the movable iron core, the connecting rod 14 extends out of the electromagnet 1 to be associated with the delay mechanism 12, the delay mechanism 12 has motion inertia, when the movable iron core acts, namely, the connecting rod moves along the linear motion, the delay mechanism 12 is pulled to move, and part of energy of the movable iron core acts is converted into the motion inertia of the delay mechanism 12, so that the movable iron core acts are delayed. When power frequency transient overvoltage occurs, the movable iron core of the electromagnet 1 drags the delay mechanism 12 to move; when the movable iron core of the electromagnet is delayed by the delay mechanism and does not reach the rapid movement, the transient overvoltage is ended, and the movable iron core does not have enough kinetic energy to strike the tripping mechanism 2, so that the breaking contact point 6 is restored to the original state under the action of the restoring mechanism in the electromagnet, and the circuit breaker is restored to the static state.
The mechanical delay mechanism 12 may be implemented in a variety of ways, such as the following embodiments.
Embodiment one:
as shown in fig. 2 and 3, the electromagnet 1 with the delay mechanism 12 is provided with rotary motion inertia, the delay mechanism 12 comprises an inertia wheel 13, a spiral track 17 is correspondingly arranged on the side surface of the connecting rod 14 along the axial direction, a through hole 15 is arranged at the axis of the inertia wheel 13, a spiral protrusion 16 is arranged in the through hole 15 and is sleeved on the connecting rod 14 through the through hole 15, and the spiral protrusion 16 is matched with the spiral track 17. The position of the flywheel 13 along the axial direction of the connecting rod 14 is fixedly restrained, for example, a clamping position is arranged on the connecting rod 14 outside the flywheel 13, so that the flywheel 13 is prevented from moving along the axial direction of the connecting rod 14 and even is separated from the connecting rod 14. When the connecting rod 14 moves in a straight line, the flywheel 13 can slide relative to the connecting rod 14 and rotate around the axis of the connecting rod 14 under the action of the spiral track 17. At this time, the spiral track of the connecting rod 14 rotates through an angle relative to the position of the flywheel 13, so as to drive the flywheel 13 to rotate, and the kinetic energy of the movable iron core is partially converted into the motion inertia of the flywheel 13.
Preferably, 2 spiral protrusions which are 180 degrees opposite to each other along the axial direction are arranged in the through hole 15, and 2 spiral tracks 17 which are 180 degrees opposite to each other along the axial direction are arranged on the corresponding connecting rod 14, so that the stability of the movement of the flywheel 13 is facilitated.
By this delay mechanism 12, the kinetic energy of the moving core is partially converted into rotational inertia of the flywheel 13, so that the kinetic energy of the moving core is reduced. In this embodiment, by adjusting the inclination angles of the spiral protrusion 16 and the spiral track 17 with respect to the radial direction of the connecting rod 14, the ratio of kinetic energy converted into rotational moment of inertia of the flywheel 13 when the moving core moves can be conveniently adjusted. In addition, by adjusting the size of the flywheel 13, the rotational inertia of the flywheel 13 can also be adjusted conveniently.
In this embodiment, since the flywheel 13 can be assembled close to the electromagnet 1, the electromagnet 1 with the delay mechanism 12 has a small structural size, and is convenient to install.
Embodiment two:
as shown in fig. 4, the electromagnet 1 with the delay mechanism 12, wherein the delay mechanism 12 comprises a gear structure 19 and a flywheel 19c connected with the gear structure 19, and the flywheel 19c can rotate under the drive of the gear structure 19, so that the moment of inertia is provided. Correspondingly, a rack 18 is provided on the side of the connecting rod 14 in its axial direction. The gear mechanism 19 is fixed on the outer side of the connecting rod 14, the gear mechanism 19 is meshed with the rack 18, and when the connecting rod 14 moves along a straight line, the rack 18 drives the gear mechanism 19 to move, so that the flywheel 19c is driven to rotate. The gear mechanism 19 may be a single gear or a multiple gear speed increasing mechanism. Preferably, the embodiment adopts a multi-gear speed increasing mechanism, and the multi-gear speed increasing mechanism is a gear speed increasing mechanism formed by the primary gear 19a and the speed increasing gear set 19b, and when the connecting rod 14 moves along a straight line, the rack 18 drives the gear mechanism 19 to move and increase speed, so that the flywheel 19c is driven to rotate at a high speed. With a multi-gear speed increasing mechanism, the flywheel 19c connected with the gear structure 19 can be small and light, but the flywheel 19c can form large moment of inertia through high-speed rotation.
Compared with the first embodiment, the gear structure 19 and the flywheel 19c are adopted in the first embodiment, so that the whole structure is slightly large in size, lighter in weight and convenient to install.
Embodiment III:
as shown in fig. 5, the electromagnet 1 with the delay mechanism 12 has a delay mechanism 12, wherein the delay mechanism 12 comprises a pendulum 20, and the moment of inertia is generated by the swing of the pendulum 20. The pendulum 20 comprises a pendulum rod 20a and a hammer body 20b, the pendulum rod 20a is pivoted on one side of the connecting rod 14 through a pivot point 21, a connecting point 22 is arranged at one end of the pendulum rod 20a far away from the hammer body 20b and is used for being connected with the connecting rod 14, the hammer body 20b naturally sags under the action of gravity, and when the connecting rod 14 moves along a straight line, the pendulum rod 20a of the pendulum 20 is pulled through the connecting rod 14, so that the pendulum 20 swings around the pivot point 21 against the gravity of the pendulum 20.
In this embodiment, the delay mechanism 12 is simple in structure, and is suitable for use when the connecting rod 14 is arranged horizontally, and the pendulum 20 has a certain mass and has a large moment of inertia in rotation during swinging.
Embodiment four:
as shown in fig. 6, the electromagnet 1 is shown with a delay mechanism 12, the delay mechanism 12 being a delay mechanism with a linear moment of inertia. Comprises a weight 23 fixed on the connecting rod 14. When the connecting rod 14 moves along the straight line, the weight 23 is pulled to move in the same direction, and the kinetic energy of the movable iron core is partially converted into the straight line motion inertia of the weight 23.
Because the heavy hammer 23 and the connecting rod 14 move in the same direction and in a straight line, when the connecting rod 14 is arranged vertically, the kinetic energy of the movable iron core needs to overcome the gravity of the heavy hammer 23, and the delay effect is more obvious.
In this embodiment, the delay mechanism 12 is the simplest but has the problem of a large difference between the horizontal arrangement and the vertical arrangement, and the weight 23 needs a large weight. The weight 23 is heavier than the pendulum 20 of the third embodiment and the flywheel 13 of the first embodiment.
Due to the action of the motion inertia-based time delay mechanism, larger short-circuit current excitation is needed to generate enough kinetic energy to ensure that the moving iron core of the electromagnet completes the action, and the moving iron core impacts the trip switch to complete the breaking of the contact. Under different short-circuit current driving, different time delays can be generated, when the kinetic energy generated by the excitation of the transient short-circuit current is insufficient to ensure that the movable iron core completes the action, the circuit breaker can recover to be static, and the large short-circuit current excitation can generate enough energy to ensure that the movable iron core of the electromagnet completes the action instantly, impact the tripping switch and complete the breaking of the contact head.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A time delay tripping circuit breaker based on motion inertia comprises a wire inlet end (4), a tripping mechanism (2), a time delay mechanism (12), a contact head (6), a wire outlet end, an indicator (3) and an electromagnet (1) with an electromagnet coil (8) and a movable iron core,
the wire inlet end (4), the contact head (6), the electromagnet coil (8) and the wire outlet end (11) are connected to form a main circuit, when the electromagnet coil (8) passes through power frequency short-circuit current, the movable iron core acts to strike the tripping mechanism (2) to break the contact head (6); the method is characterized in that: the movable iron core comprises a connecting rod (14) protruding from an electromagnet (1) and arranged along the linear movement direction of the movable iron core, the delay mechanism (12) has movement inertia, the delay mechanism (12) is associated with the connecting rod (14), when the connecting rod (14) moves along the linear movement, the delay mechanism (12) is pulled to move, and the kinetic energy of the movable iron core is reduced due to the fact that part of the kinetic energy is converted into the movement inertia of the delay mechanism (12), so that the movable iron core is delayed to move;
the delay mechanism (12) has a rotational moment of inertia;
the time delay mechanism (12) comprises an inertia wheel (13), a spiral track (17) is arranged on the surface of the connecting rod (14) along the axial direction, a through hole is formed in the axis of the inertia wheel (13), a spiral protrusion (16) is arranged in the through hole, the inertia wheel (13) is sleeved on the connecting rod (14) through the through hole, the spiral protrusion (16) and the spiral track (17) are matched, meanwhile, the position of the inertia wheel (13) along the axial direction of the connecting rod (14) is fixedly restrained, and when the connecting rod (14) moves along a straight line, the inertia wheel (13) can slide relative to the connecting rod (14) and rotate under the action of the spiral track (17).
2. The time delay trip circuit breaker of claim 1, wherein: 2 spiral bulges (16) which are opposite in the axial direction and are 180 degrees are arranged in the through hole, and 2 spiral tracks (17) which are opposite in the axial direction and are 180 degrees are arranged on the connecting rod (14) corresponding to the through hole.
3. The utility model provides a time delay tripping circuit breaker based on moment of inertia, includes wire inlet end (4), tripping device (2), time delay device (12), contact (6), wire outlet end, indicator (3) and have electromagnet (1) of electromagnet coil (8) and movable iron core, wire inlet end (4), contact (6), electromagnet coil (8) and wire outlet end (11) connect and constitute the main circuit, when electromagnet coil (8) pass through power frequency short-circuit current, movable iron core action, striking tripping device (2), break contact (6); the method is characterized in that: the movable iron core comprises a connecting rod (14) protruding from an electromagnet (1) and arranged along the linear movement direction of the movable iron core, the delay mechanism (12) has movement inertia, the delay mechanism (12) is associated with the connecting rod (14), when the connecting rod (14) moves along the linear movement, the delay mechanism (12) is pulled to move, and the kinetic energy of the movable iron core is reduced due to the fact that part of the kinetic energy is converted into the movement inertia of the delay mechanism (12), so that the movable iron core is delayed to move;
the delay mechanism (12) has a rotational moment of inertia;
the time delay mechanism comprises a gear mechanism (19) and a flywheel (19 c) connected with the gear mechanism, and the flywheel (19 c) rotates under the linkage of the gear mechanism (19) so as to form rotary motion inertia; the outside of connecting rod (14) forms rack (18), gear (19) with rack (18) meshing, when connecting rod (14) along rectilinear movement, drive gear (19) through rack (18) and move, and then drive flywheel (19 c) rotation.
4. The time delay trip circuit breaker of claim 3, wherein: the gear mechanism (19) is a single gear or a multi-gear speed increasing mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811349380.4A CN109326494B (en) | 2018-11-14 | 2018-11-14 | Time delay tripping circuit breaker based on motion inertia |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811349380.4A CN109326494B (en) | 2018-11-14 | 2018-11-14 | Time delay tripping circuit breaker based on motion inertia |
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| Publication Number | Publication Date |
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| CN109326494A CN109326494A (en) | 2019-02-12 |
| CN109326494B true CN109326494B (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811349380.4A Active CN109326494B (en) | 2018-11-14 | 2018-11-14 | Time delay tripping circuit breaker based on motion inertia |
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| CN112728200B (en) * | 2021-01-07 | 2023-04-11 | 南通大学 | Control mechanism and control method capable of quickly cutting off fluid pipeline |
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| CN2527022Y (en) * | 2002-02-09 | 2002-12-18 | 吴世镇 | Gearing motor |
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| CN203086125U (en) * | 2012-12-05 | 2013-07-24 | 孙巍巍 | Novel surge protection device |
| CN203631458U (en) * | 2013-11-29 | 2014-06-04 | 北京Abb低压电器有限公司 | Circuit breaker accessory for abnormal voltage protection and automatic switch-on |
| CN103855696A (en) * | 2012-12-05 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN108493072A (en) * | 2018-03-19 | 2018-09-04 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of high current frame-type dc circuit breaker short circuit delay tunable arrangement |
| CN208923012U (en) * | 2018-11-14 | 2019-05-31 | 厦门大恒科技有限公司 | Time delay tripping circuit breaker based on motion inertia |
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2018
- 2018-11-14 CN CN201811349380.4A patent/CN109326494B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527022Y (en) * | 2002-02-09 | 2002-12-18 | 吴世镇 | Gearing motor |
| CN201741647U (en) * | 2010-06-10 | 2011-02-09 | 厦门大恒科技有限公司 | Air switch with delay tripping and automatic superposition functions |
| CN203086125U (en) * | 2012-12-05 | 2013-07-24 | 孙巍巍 | Novel surge protection device |
| CN103855696A (en) * | 2012-12-05 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN203631458U (en) * | 2013-11-29 | 2014-06-04 | 北京Abb低压电器有限公司 | Circuit breaker accessory for abnormal voltage protection and automatic switch-on |
| CN108493072A (en) * | 2018-03-19 | 2018-09-04 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of high current frame-type dc circuit breaker short circuit delay tunable arrangement |
| CN208923012U (en) * | 2018-11-14 | 2019-05-31 | 厦门大恒科技有限公司 | Time delay tripping circuit breaker based on motion inertia |
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| CN109326494A (en) | 2019-02-12 |
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