CN209859890U - Tripping mechanism of circuit breaker - Google Patents
Tripping mechanism of circuit breaker Download PDFInfo
- Publication number
- CN209859890U CN209859890U CN201921099882.6U CN201921099882U CN209859890U CN 209859890 U CN209859890 U CN 209859890U CN 201921099882 U CN201921099882 U CN 201921099882U CN 209859890 U CN209859890 U CN 209859890U
- Authority
- CN
- China
- Prior art keywords
- spring
- movable
- core
- circuit breaker
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
-
- 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
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
Abstract
The utility model provides a tripping mechanism of circuit breaker. The utility model discloses a trip mechanism of circuit breaker of embodiment includes: a fixed contact; a movable contact point contacting or separating with the fixed contact point; a bobbin disposed at one side of the fixed contact; a coil wound around an outer circumferential surface of the bobbin; a fixed core fixedly disposed at one side of the bobbin; a movable core slidably provided on the other side of the bobbin and moving in a direction of the fixed core when a magnetic field is generated in the coil; a partition plate slidably provided between the fixed core and the movable core; a first spring provided between the movable core and the partition plate; a second spring disposed between the partition plate and the fixed core; and a movable rod coupled to the partition plate and penetrating the fixed core to trip the movable contact.
Description
Technical Field
The present invention relates to a circuit breaker, and more particularly, to a trip mechanism of a circuit breaker.
Background
Generally, a circuit breaker (simply referred to as a breaker) is an electrical device that is installed in a power transmission line, a power transformation line, or a part of an electrical circuit to open and close a load or to protect an electrical facility and the load by opening the electrical circuit when an accident such as a short circuit occurs.
The small circuit breaker (small wiring circuit breaker) is installed in a small distribution board forming a low-voltage circuit (15-30A) of 110/220V AC, and is used for overcurrent protection and short-circuit protection. The circuit breaker is used as a switch which is built in a distribution board of a house, a business, an office, a market, or the like, and is used as a device capable of conveniently opening and closing a plurality of loads at one place. In addition, the present invention is also used for switching on and off power supplies for devices such as work machines and plant equipment.
As in a general industrial circuit breaker, a circuit breaker includes a contact portion including a fixed contact and a movable contact, an opening/closing mechanism portion capable of opening/closing the contact portion, a detection mechanism portion for detecting an abnormal current, a trip portion for protecting a line or a load by opening the opening/closing mechanism portion when an abnormal current such as an overcurrent or a short-circuit current occurs, and an arc extinguishing portion for performing a function of extinguishing and cooling an arc generated at the time of opening.
Fig. 1 shows a circuit breaker according to the prior art. The existing circuit breaker is provided with: a housing 1 for maintaining insulation from the outside and fixing and supporting positions of respective components; a handle 2 for operating the mechanism section; a latch 3 that maintains a fixed state while transmitting a rotational force of the handle 2 to the movable contact 4; a movable contact 4 fixed to the latch 3 and limiting a current; the terminal portion 6 is connected to a power supply or a load. On the other hand, a trip mechanism (coil assembly) 10 is provided to trip the movable contact 4 when overcurrent as well as short-circuit current occurs.
The operation of the circuit breaker is explained specifically as follows. When the handle 2 is rotated counterclockwise, the movable contact 4 connected to the latch 3 rotates and comes into contact with the fixed contact 5, and the circuit is turned on.
Fig. 2 shows a trip mechanism. The trip mechanism is also referred to as a trip assembly or coil assembly.
The coil assembly 10 is constituted by a yoke 11 fixed to the housing 1 and a cylindrical bobbin 12, a coil 13 wound around an outer peripheral surface of the bobbin 12, a fixed core 14 fixed to one side of the bobbin 12, a movable core 15 slidably provided on the other side of the bobbin 12, an actuator lever 16 engaged with the movable core 15 and tripping the movable contact 4, a spring (not shown) provided between the fixed core 14 and the movable core 15, and the like.
When an overcurrent or an accident current occurs in the circuit during energization, the current is applied to the coil block 10, and the movable core 15 located inside the coil block 10 is attracted toward the fixed core 14 by the magnetic force generated in the coil block 10.
As the movable core 15 moves, it moves in the direction of the fixed core 14 against the elastic force of a spring (not shown) inside the bobbin 12, and the actuating lever 16 pushes the movable contact 4 open, whereby the electric circuit is opened.
However, in the trip mechanism of the conventional circuit breaker, as described above, when the trip operation is performed by the simple structure of the fixed core, the movable core, and the spring, the time delay setting cannot be realized. That is, the opening operation has a fixed set value. Therefore, in the case of using a plurality of circuit breakers, the opening sequence adjustment cannot be achieved.
SUMMERY OF THE UTILITY MODEL
The present invention has been made to solve the above problems, and an object of the present invention is to provide a trip mechanism of a circuit breaker having a delay characteristic in an opening operation.
The utility model discloses a trip mechanism of circuit breaker of embodiment includes: a fixed contact; a movable contact point contacting or separating with the fixed contact point; a bobbin disposed at one side of the fixed contact; a coil wound around an outer circumferential surface of the bobbin; a fixed core fixedly disposed at one side of the bobbin; a movable core slidably provided on the other side of the bobbin and moving in a direction of the fixed core when a magnetic field is generated in the coil; a partition plate slidably provided between the fixed core and the movable core; a first spring provided between the movable core and the partition plate; a second spring disposed between the partition plate and the fixed core; and a movable rod coupled to the partition plate and penetrating the fixed core to trip the movable contact.
Here, the fixed core is formed with a through hole into which the movable rod can be inserted.
Further, a first insertion groove in which one end of the first spring can be disposed is formed in one surface of the movable core.
Further, a first insertion portion in which the other end of the first spring can be disposed is formed on one surface of the partition plate.
Further, a second insertion portion in which the movable rod can be provided is formed on the other surface of the partition plate.
Further, a second insertion groove in which the other end of the second spring can be disposed is formed in one surface of the fixed core.
The movable rod is formed in a pin shape, a head portion of the movable rod is fixedly provided to the second insertion portion of the partition plate, and a leg portion of the movable rod is inserted into the through hole and faces the movable contact.
In addition, the diameter of the second spring is smaller than the diameter of the first spring.
And the spring constant of the first spring is different from the spring constant of the second spring.
According to an embodiment of the present invention, the movable core overcomes the first spring (compression) and moves toward the fixed core under the first current value condition, and the second spring also overcomes (compression) and moves under the second current value condition larger than the first current value, thereby breaking the circuit. In this process, since a time delay due to the first spring (or a time delay due to the operation of the movable core under the condition near the first current value) occurs, the user can set the range of the operating time at the time of the instantaneous trip operation.
In other words, the user can set the first current value that does not cause the opening operation of the circuit breaker but is delayed in time. Here, the user can set the time delay range by setting the first current value and the second current value to each other.
By using such a time delay characteristic, the operation sequence of the circuit breaker can be set at a place where a plurality of circuit breakers are provided.
Drawings
Fig. 1 is an internal view of a circuit breaker according to the related art.
Fig. 2 is a front view of the trip assembly shown in fig. 1.
Fig. 3 and 4 are internal views of a circuit breaker according to an embodiment of the present invention. Fig. 3 shows the energized state, and fig. 4 shows the disconnected state.
Fig. 5 is a cross-sectional view of the trip assembly shown in fig. 3.
Fig. 6 is a perspective view of the separator shown in fig. 5.
Fig. 7 to 9 are action diagrams of the trip assembly.
Description of reference numerals
20: the housing 21: terminal section
22: terminal 24: latch lock
25: opening/closing mechanism 26: handle bar
27: rotation shaft 28: movable contact
29: fixed contact 30: detection mechanism
31: the bimetal strip 35: arc extinguishing unit
36: side plate 37: grid (C)
38: arc runner 40: trip mechanism part
41: yoke 42: bobbin
45: coil 50: fixed core
51: through-hole 52: second insertion groove
55: movable core 56: first insertion groove
60: movable rod 65: partition board
66: second insertion portion 67: first insertion part
70: first spring 75: second spring
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are provided only for the purpose of facilitating those skilled in the art to practice the present invention, and do not limit the technical spirit and scope of the present invention.
Next, an opening/closing mechanism of a circuit breaker according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Fig. 3 and 4 are internal views of a circuit breaker according to an embodiment of the present invention. Fig. 3 shows the energized state, and fig. 4 shows the disconnected state.
The utility model discloses a trip mechanism of circuit breaker of embodiment includes: a fixed contact 29; a movable contact 28 that is in contact with or separated from the fixed contact 29; a bobbin 42 provided on one side of the fixed contact 29; a coil 45 wound around an outer peripheral surface of the bobbin 42; a fixed core 50 fixedly provided on one side of the bobbin 42; a movable core 55 slidably provided on the other side of the bobbin 42 and moving in the direction of the fixed core 50 when a magnetic field is generated in the coil 45; a partition 65 slidably provided between the fixed core 50 and the movable core 55; a first spring 70 provided between the movable core 55 and the partition 65; a second spring 75 disposed between the partition 65 and the stationary core 50; and a movable rod 60 coupled to the partition 65 and penetrating the fixed core 50 to trip the movable contact 28.
The case 20 forms an external appearance of the circuit breaker, and is formed to be able to incorporate therein the terminal portion 21, the opening and closing mechanism portion 25, the contact portions 28, 29, the detection mechanism portion 30, the trip mechanism portion 40, the arc extinguishing portion 35, and the like. The housing 20 is formed by two or more molded products, and the components can be assembled inside. The case 20 may be formed of an insulating substance such as synthetic resin in order to be insulated from the outside.
The terminal portions 21 are respectively provided on both sides of the housing 20. One terminal portion 21 is connected to a power supply, and the other terminal portion 21 is connected to a load.
The opening/closing mechanism 25 is provided to connect and disconnect the contact portions 28 and 29 of the electric circuit by the operation of the user. The opening/closing mechanism unit 25 includes a handle 26 protruding outside the housing 20, a latch 24 connected to the handle 26, and a rotary shaft 27 serving as a rotation center of the latch 24 and the movable contact 28.
The opening/closing mechanism 25 functions as follows. In the off state shown in fig. 4, when the user operates the handle 26 in the clockwise direction, the opening/closing mechanism 25 rotates in the clockwise direction about the rotation shaft 27, and the movable contact 28 comes into contact with the fixed contact 29 (see fig. 3). The circuit is thus powered on.
On the other hand, in the energized state shown in fig. 3, when the user operates the handle 26 counterclockwise, the opening/closing mechanism 25 rotates counterclockwise about the rotary shaft 27, and the movable contact 28 is separated from the fixed contact 29 (see fig. 4). Thus, the circuit is open.
The detection mechanism portion 30 includes a bimetal 31. When the detection mechanism 30 detects an overcurrent and bends the bimetal 31, the opening/closing mechanism 25 is operated to separate the movable contact 28 from the fixed contact 29, thereby breaking the circuit. The detection mechanism part 30 may also be referred to as an overcurrent trip device or a temporary trip mechanism.
The arc extinguishing unit 35 extinguishes an arc generated at the time of disconnection. The arc extinguishing unit 35 includes a plurality of grids 37 provided at predetermined intervals on the side plate 36. The arc generated at the contact portions 28, 29 at the time of opening is guided to the grid 37 and is cooled, the current is reduced at the time of division, and is extinguished. In order to guide the arc from the contact portions 28, 29 to the arc extinguishing portion 35, an arc runner 38 may be provided.
The trip mechanism portion 40 may also be referred to as an instantaneous trip mechanism or trip assembly or coil assembly. The trip mechanism part 40 is applied to overcurrent and short-circuit current trip, compared to the case where the detection mechanism part 30 is applied to overcurrent trip.
Further reference is made to fig. 5. The trip mechanism portion 40 includes a yoke 41, a bobbin 42, a coil 45, a fixed core 50, a movable core 55, a movable rod 60, a partition 65, a first spring 70, and a second spring 75.
The yoke 41 is fixedly provided to the housing 20. The yoke 41 supports the bobbin 42. The yoke 41 functions as a part of an electric circuit and also functions as a part of a magnetic circuit (magnetic path). One side of the yoke 41 is connected to the terminal 22, and the other side of the yoke 41 is connected to the fixed contact 29. When the movable contact 28 is in contact with the fixed contact 29, the power source (not shown), the terminal 22, the yoke 41, the fixed contact 29, the movable contact 28, and the load (not shown) form a closed circuit.
The spool 42 is provided to the housing 20. The bobbin 42 is supported by the yoke 41. The bobbin 42 may be formed in a tube shape having a hollow portion inside. Both ends of the bobbin 42 may be formed with flanges.
The bobbin 42 is described as a tube and has a hollow portion (through hole) formed therein. The movable core 55 and the spacer 65 are slidable within the hollow portion of the spool 42.
The partition 65 is provided slidably inside the bobbin 42. The diaphragm 65 moves within the spool 42.
The fixed core 50 is fixedly provided on one side (the direction in which the movable contact is provided, the load side) of the bobbin 42. The stationary core 50 is preferably formed of a metal member to facilitate the formation of a magnetic field.
The fixed core 50 has a through hole 51 through which the movable rod 60 can be inserted.
A second insertion groove 52 is formed in one surface of the fixed core 50, in which the other end of the second spring 75 can be disposed.
The movable core 55 is provided on the other side (power supply side) of the bobbin 42 in a slidable (or linear) manner. The movable core 55 is preferably formed of a metal member to facilitate formation of a magnetic field.
A first insertion groove 56 is formed in one surface of the movable core 55. One end of the first spring 70 is fixed to the first insertion groove 56 of the movable core 55.
The partition 65 is provided to be capable of linear movement inside the spool 42. The partition 65 may be formed in a disk shape. The spacer 65 moves between the movable core 55 and the fixed core 50. A first insertion portion 67 is formed on one surface (movable core side) of the partition plate 65, and a second insertion portion 66 is formed on the other surface (fixed core side) of the partition plate 65. The movable rod 60 is fixedly provided to the second insertion portion 66 of the partition plate 65. The first spring 70 is provided in the first insertion portion 67 of the partition plate 65. The partition 65 receives the force of the first spring 70 and the second spring 75.
The movable rod 60 is fixedly disposed on the partition plate 65. The movable rod 60 may be formed in a pin shape. The head of the movable rod 60 is fixedly provided to the second insertion portion 66 of the partition plate 65. The leg of the movable lever 60 is inserted into the through hole 51 of the fixed core 50 and faces the movable contact 28.
The movable rod 60 moves together with the diaphragm 65. The movable rod 60 pushes the movable contact 28 open the circuit. The movable rod 60 may be formed integrally with the partition 65.
The first spring 70 is disposed between the movable core 55 and the partition 65. One end of the first spring 70 is fixed to the second insertion groove 56 of the movable core 55, and the other end of the first spring 70 is fixed to the first insertion portion 67 of the partition plate 65. When the movable core 55 receives a force in the direction of the fixed core 50 by the magnetic field of the coil 45, the first spring 70 is compressed. The diaphragm 65 receives a force toward the stationary core 50 by the first spring 70.
The second spring 75 is disposed between the fixed core 50 and the partition 65. One end of the second spring 75 is fixed to the head of the movable rod 60, and the other end of the second spring 75 is fixed to the first insertion groove 52 of the stationary core 50. The second spring 75 is compressed by the diaphragm 65. The diameter of the second spring 75 may be smaller than the diameter of the first spring 70.
The elastic coefficients (or spring constants) of the first spring 70 and the second spring 75 may be set to be different from each other. That is, the spring constant of the first spring 70 may be smaller than the spring constant of the second spring 75. That is, the elastic force of the first spring 70 may be set to be smaller than the elastic force of the second spring 75.
The operation of the trip mechanism of the circuit breaker according to an embodiment of the present invention will be described in detail with reference to fig. 7 to 9.
Fig. 7 is an energized state. The current flows from the power supply terminal 22 to the load side via the yoke 41, the fixed contact 29, and the movable contact 28. The movable rod 60 is in a state of being separated from the movable contact 28 together with the partition 65. The partition 65 is separated from the fixed core 50 by the elastic force of the second spring 75, and the movable core 55 is separated from the partition 65 by the elastic force of the first spring 70. At this time, the movable core 55 is in a state of being spaced apart from the fixed core 50 by the first spring 70 and the second spring 75 to the maximum.
When an overcurrent is generated in the circuit, a magnetic field is generated in the coil 45, and the fixed core 50 is magnetized. Therefore, a suction force that sucks the movable core 55 is generated in the fixed core 50.
When an overcurrent exceeding a first current value (a set value, for example, a value 8 times the rated current) flows in the circuit, the movable core 55 moves in the direction in which the fixed core 50 is located against the elastic force of the first spring 70. However, such a first current is not sufficient to overcome the elastic force of the second spring 75. Therefore, as shown in fig. 8, the movable core 55 moves in the direction of the fixed core 50 and comes into contact with the spacer 65, but the spacer 65 and the movable rod 60 are held in place or cannot come into contact with the movable contact 28 even if they move. The circuit remains energized.
When an overcurrent exceeding a second current value (a set value, for example, a value 12 times the rated current) flows in the circuit, the movable core 55 overcomes the elastic force of the first spring 70 and the elastic force of the second spring 75 and moves in the direction in which the fixed core 50 is located. Here, the second current value is larger than the first current value. Therefore, as shown in fig. 9, the movable core 55, the partition 65, and the movable lever 60 all move in the direction of the fixed core 50, and the movable lever 60 opens the electric circuit by pushing the movable contact 28 open. At this time, the spacer 65 is in a state close to the fixed core 50.
According to an embodiment of the present invention, the movable core overcomes the first spring (compression) and moves toward the fixed core under the first current value condition, and the second spring also overcomes (compression) and moves under the second current value condition larger than the first current value, thereby breaking the circuit. In this process, since a time delay due to the first spring (or a time delay due to the operation of the movable core under the condition near the first current value) occurs, the user can set the range of the operating time at the time of the instantaneous trip operation.
In other words, the user can set the first current value that does not cause the opening operation of the circuit breaker but is delayed in time. Here, the user can set the time delay range by setting the first current value and the second current value to each other.
By using such a time delay characteristic, the operation sequence of the circuit breaker can be set at a place where a plurality of circuit breakers are provided.
Although the preferred embodiments of the present invention have been described, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, and it is intended that all such modifications and variations be within the scope of the appended claims.
Claims (9)
1. A trip mechanism for a circuit breaker, comprising:
a fixed contact;
a movable contact point contacting or separating with the fixed contact point;
a bobbin disposed at one side of the fixed contact;
a coil wound around an outer circumferential surface of the bobbin;
a fixed core fixedly disposed at one side of the bobbin;
a movable core slidably provided on the other side of the bobbin and moving in a direction of the fixed core when a magnetic field is generated in the coil;
a partition plate slidably provided between the fixed core and the movable core;
a first spring provided between the movable core and the partition plate;
a second spring disposed between the partition plate and the fixed core; and
and a movable rod coupled to the partition plate and penetrating the fixed core to trip the movable contact.
2. The trip mechanism of a circuit breaker of claim 1,
the fixed core is formed with a through hole into which the movable rod can be inserted.
3. The trip mechanism of a circuit breaker of claim 2,
a first insertion groove in which one end of the first spring can be disposed is formed in one surface of the movable core.
4. The trip mechanism of a circuit breaker of claim 1,
a first insertion portion in which the other end of the first spring can be disposed is formed on one surface of the partition plate.
5. The trip mechanism of a circuit breaker of claim 2,
a second insertion portion in which the movable rod can be disposed is formed on the other surface of the partition plate.
6. The trip mechanism of a circuit breaker of claim 1,
a second insertion groove in which the other end of the second spring can be disposed is formed in one surface of the fixed core.
7. The trip mechanism of a circuit breaker of claim 5,
the movable rod is formed in a pin shape, a head portion of the movable rod is fixedly provided to the second insertion portion of the partition plate, and a leg portion of the movable rod is inserted into the through hole and faces the movable contact.
8. The trip mechanism of a circuit breaker of claim 1,
the diameter of the second spring is smaller than the diameter of the first spring.
9. The trip mechanism of a circuit breaker of claim 1,
the spring constant of the first spring is different from the spring constant of the second spring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2018-0082488 | 2018-07-16 | ||
| KR1020180082488A KR102521937B1 (en) | 2018-07-16 | 2018-07-16 | Trip Unit of Circuit Breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209859890U true CN209859890U (en) | 2019-12-27 |
Family
ID=68943080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921099882.6U Active CN209859890U (en) | 2018-07-16 | 2019-07-12 | Tripping mechanism of circuit breaker |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR102521937B1 (en) |
| CN (1) | CN209859890U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735907B (en) * | 2020-12-30 | 2024-01-23 | 安徽徽电科技股份有限公司 | Circuit breaker based on self-driving principle |
| CN114388313B (en) * | 2021-12-24 | 2024-03-12 | 上海京硅智能技术有限公司 | Direct-acting breaker |
| KR20230143834A (en) * | 2022-04-06 | 2023-10-13 | 엘에스일렉트릭(주) | Trip Device of Manual Motor Starter |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09147701A (en) * | 1995-11-22 | 1997-06-06 | Mitsubishi Electric Corp | Vacuum opening/closing valve |
| KR19980049287U (en) * | 1996-12-30 | 1998-10-07 | 배순훈 | Push switch device |
| KR20130001368U (en) * | 2011-08-19 | 2013-02-27 | 엘에스산전 주식회사 | Instant trip mechanism for home circuit breaker |
| KR20150108247A (en) * | 2014-03-17 | 2015-09-25 | 엘에스산전 주식회사 | Instant Trip Device of Miniature Circuit Breaker |
-
2018
- 2018-07-16 KR KR1020180082488A patent/KR102521937B1/en active IP Right Grant
-
2019
- 2019-07-12 CN CN201921099882.6U patent/CN209859890U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20200008407A (en) | 2020-01-28 |
| KR102521937B1 (en) | 2023-04-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4636760A (en) | Low voltage circuit breaker with remote switching function | |
| JP3004387B2 (en) | Instantaneous trip device of circuit breaker | |
| US8264306B2 (en) | Movable contactor assembly for current limiting type molded case circuit breaker | |
| CN209859890U (en) | Tripping mechanism of circuit breaker | |
| JP2894052B2 (en) | Circuit breaker | |
| US5053735A (en) | Remotely-operated circuit breaker | |
| US4112270A (en) | Means connecting circuit breaker and auxiliary feature modules | |
| AU2004201267B2 (en) | Remotely controllable circuit breaker including bypass magnet circuit | |
| JPH02100230A (en) | Remotely operated type circuit breaker | |
| AU2004201318A1 (en) | Circuit breaker mechanism including mechanism for breaking tack weld | |
| US6469600B1 (en) | Remote control circuit breaker with a by-pass lead | |
| KR20150029165A (en) | Circuit breaker | |
| CN209963002U (en) | Trip mechanism of small circuit breaker | |
| EP2731122B1 (en) | Thermomagnetic circuit breaker and distribution device | |
| KR101168257B1 (en) | moving breaking contact unit of moldedcase circuit breaker having EMFA | |
| EP1218899B1 (en) | Electric pole for low-voltage power circuit breaker | |
| CN113539755A (en) | Circuit breaker | |
| US9349555B2 (en) | Current limited electrical devices, electrical device contact assemblies, and operational methods | |
| WO2018212687A1 (en) | An instantaneous tripping device for a miniature circuit breaker and miniature circuit breaker comprising the same | |
| KR19980052340A (en) | Current-limiting mechanism part of wiring breaker | |
| EP4318531A1 (en) | Residual current operated circuit-breaker with width of 18 mm | |
| CN116364487A (en) | Leakage circuit breaker | |
| KR20230143834A (en) | Trip Device of Manual Motor Starter | |
| RU2329559C1 (en) | Fast-acting automatic breaker | |
| KR101098930B1 (en) | Moving breaking contact unit of moldedcase circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |