CN109243936B - Multi-loop circuit breaker - Google Patents
Multi-loop circuit breaker Download PDFInfo
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- CN109243936B CN109243936B CN201811257160.9A CN201811257160A CN109243936B CN 109243936 B CN109243936 B CN 109243936B CN 201811257160 A CN201811257160 A CN 201811257160A CN 109243936 B CN109243936 B CN 109243936B
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- 230000007246 mechanism Effects 0.000 claims abstract description 61
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000003068 static effect Effects 0.000 claims description 44
- 238000005452 bending Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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Abstract
A multi-loop circuit breaker comprises a wire inlet terminal, a wire outlet terminal, an electromagnetic mechanism, a stationary contact, a movable contact and a thermal disengaging mechanism; the electromagnetic mechanism is provided with a coil and a movable iron core, one end of the coil is electrically connected with the wire inlet terminal, and the movable iron core is positioned in the coil and can move along the axis of the movable iron core; the fixed contact is electrically connected with the coil, and the movable contact is electrically connected with the hot-off mechanism; the electromagnetic mechanism also comprises a linkage rod and at least one first auxiliary current loop, wherein the first auxiliary current loop is connected with the electromagnetic mechanism in parallel; the linkage rod is rotatably arranged, one end of the linkage rod is linked with one end of the movable iron core, and the other end of the linkage rod is in abutting contact with the first auxiliary current loop; when short circuit, the movable iron core moves to drive the linkage rod to rotate, so that the first auxiliary current loop is disconnected firstly, and then the stationary contact is separated from the movable contact. The invention can improve the rated current of the circuit breaker and the short-circuit breaking capacity of the circuit breaker.
Description
Technical Field
The invention relates to the field of circuit breakers, in particular to a multi-circuit breaker.
Background
The electromagnetic tripping mechanism is an important functional component of a miniature circuit breaker and mainly comprises a coil, a movable iron core, a static iron core and the like. The movable iron core and the static iron core are positioned in the inner cavity of the coil, a certain gap is reserved between the movable iron core and the static iron core under the normal working current, the movable iron core moves towards the direction of the static iron core under the action of a strong magnetic field generated by the coil under the short-circuit current, the gap is eliminated, and the tripping mechanism of the contact mechanism of the circuit breaker is pushed by the push rod in the moving process of the movable iron core so as to break the contact.
Generally, the more turns of the coil of the electromagnetic mechanism, the stronger the magnetic field generated by the coil under the short-circuit current, the faster the breaking speed of the movable iron core driving contact mechanism, and the stronger the short-circuit breaking capacity of the circuit breaker, so the more turns of the coil are expected to be better from the viewpoint of improving the short-circuit breaking capacity of the circuit breaker. However, the number of turns of the coil is increased in the limited space of the circuit breaker, the wire diameter of the circuit breaker can only be reduced, the internal resistance of the circuit breaker is increased, and the temperature rise is increased. The requirements of the short-circuit breaking capacity and the temperature rise performance of the circuit breaker on the electromagnetic mechanism coil are mutually contradictory.
At present, the rated current of a small-sized circuit breaker in the market is mostly below 63A, various high-power electric appliances enter common families in a dispute along with the improvement of the living standard of people, the household electricity consumption becomes larger and larger along with the improvement, and higher requirements are also put forward on the rated working current of the circuit breaker. Because the appearance and the installation size of the circuit breaker are limited by various existing standards or distribution boxes, the circuit breaker cannot be arbitrarily enlarged or changed, and a large-sized small circuit breaker can only be designed in the existing internal space.
The current large-current miniature circuit breaker mostly reduces the number of turns of a coil of an electromagnetic mechanism to about 1 turn, increases the conductive capacity by increasing the sectional area of a coil wire, and increases the conductive sectional area by adopting a design mode of a double-circuit in a heat tripping mechanism. The design increases the conductivity of the miniature circuit breaker to a certain extent, and solves the problem of temperature rise of the high-current circuit breaker. But the number of turns of the coil of the electromagnetic mechanism is reduced, the excitation capability is weakened, and the short circuit breaking capability of the circuit breaker is reduced. The current small-sized circuit breaker products with the width of 18mm in the market can only achieve rated current of 100A and breaking capacity of 6 kA.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a multi-circuit breaker which can improve rated current of the breaker and simultaneously improve breaking capacity of the breaker.
The invention adopts the following technical scheme:
A multi-loop circuit breaker comprises a wire inlet terminal, a wire outlet terminal, an electromagnetic mechanism, a stationary contact, a movable contact and a thermal disengaging mechanism; the electromagnetic mechanism is provided with a coil and a movable iron core, one end of the coil is electrically connected with the wire inlet terminal, and the movable iron core is positioned in the coil and can move along the axis of the movable iron core; the fixed contact is electrically connected with the coil, and the movable contact is electrically connected with the hot-off mechanism; the method is characterized in that: the electromagnetic mechanism also comprises a linkage rod and at least one first auxiliary current loop, wherein the first auxiliary current loop is connected with the electromagnetic mechanism in parallel; the linkage rod is rotatably arranged, one end of the linkage rod is linked with one end of the movable iron core, and the other end of the linkage rod is in abutting contact with the first auxiliary current loop; when short circuit, the movable iron core moves to drive the linkage rod to rotate, so that the first auxiliary current loop is disconnected firstly, and then the stationary contact is separated from the movable contact.
Preferably, one of the first auxiliary current loops further comprises a static touch plate and an elastic piece; the other end of the linkage rod is provided with a pushing part; the static contact is positioned on the static contact plate and can be in conductive contact with the movable contact, one end of the static contact plate is electrically connected with one end of the coil and is fixed with the other end of the movable iron core, and the other end of the static contact plate is in abutting contact with the pushing part; one end of the elastic piece is fixed, and the other end is propped against the other end of the static contact plate.
Preferably, a protrusion is provided on the static contact plate near the pushing portion, and when the protrusion contacts with the incoming line terminal, the first auxiliary current loop is connected.
Preferably, the static touch plate is provided with a connecting section, a bending section and an arc striking section; the connecting section is electrically connected with the coil; the bending section is connected between the connecting section and the arc striking section and is provided with the static contact; the arc striking section is positioned below the electromagnetic mechanism, and one end of the arc striking section is in abutting contact with the pushing part.
Preferably, the wire inlet terminal is located between the electromagnetic mechanism and the static contact plate.
Preferably, the heat release mechanism comprises a bimetallic strip and a movable contact plate; the movable contact plate is rotatably arranged, one side of the movable contact plate is provided with the movable contact, the other side of the movable contact plate is electrically connected with one side of the bimetallic strip through a connecting wire, and the other side of the bimetallic strip is electrically connected with the outlet terminal through the connecting wire.
Preferably, the thermal release mechanism further comprises at least one second auxiliary current loop, and the second auxiliary current loop is connected with the bimetallic strip in parallel; and when the movable contact plate is in short circuit, the movable contact plate rotates, the second auxiliary current loop is disconnected firstly, and then the fixed contact is separated from the movable contact.
Preferably, the second auxiliary current loop includes an auxiliary touch plate, one end of which is electrically connected with the outlet terminal; the other end is provided with a first auxiliary contact, the movable contact plate is correspondingly provided with a second auxiliary contact, and when the first auxiliary contact is in conductive contact with the second auxiliary contact, the second auxiliary current loop is connected.
Preferably, the mobile touch panel further comprises a handle, and the handle is connected with the mobile touch panel.
Preferably, the device further comprises an arc extinguishing device, wherein the arc extinguishing device is positioned below the static contact plate and is provided with an arc striking plate, and the arc striking plate is in conductive connection with the bimetallic strip.
As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:
1. According to the circuit breaker disclosed by the invention, at least one first auxiliary current loop is added at the electromagnetic mechanism end, the internal resistance of the circuit breaker is unchanged, namely the temperature rising performance is unchanged, and the first auxiliary current loop is controlled to be disconnected firstly through the linkage rod during short circuit, so that a multi-path electromagnetic mechanism is changed into a single-path electromagnetic mechanism, a multi-turn strong exciting coil of the multi-path electromagnetic mechanism can generate stronger electromagnetic force, a static contact and a movable contact can be driven to be disconnected rapidly, the breaking speed of the circuit breaker is greatly improved, the extinction of an electric arc is enhanced, and the breaking capacity of the circuit breaker is improved.
2. The circuit breaker of the invention is abutted against the end part of the static contact plate through the linkage rod and is matched with the elastic piece for action,
The bulge is in conductive contact with or separated from the incoming line terminal so as to switch on or switch off the first auxiliary current loop, and the structure is ingenious and the implementation is easy.
3. The circuit breaker of the invention divides the static contact plate into the connecting section, the bending section and the striking section, and is connected and matched with the incoming line terminal and the movable iron core to form a first auxiliary current loop, and the circuit breaker is reasonable in layout, small in size and easy to assemble.
4. According to the circuit breaker, at least one second auxiliary current loop can be additionally arranged at the thermal release mechanism end, so that the internal resistance of the circuit breaker is obviously reduced, and the temperature rise performance of the circuit breaker after the rated current is increased to 125A can be ensured to meet the standard requirement; when in short circuit, the two auxiliary current loops are firstly disconnected, the circuit breaker is changed into a single-way structure, then the fixed contact is separated from the movable contact, and the short circuit breaking capacity of the circuit breaker can be kept consistent with that of the single-way circuit breaker, namely, the design reduces the internal resistance of the circuit breaker so that rated current can be increased to 125A, and the short circuit breaking capacity of the circuit breaker is not reduced and is kept consistent with that before the auxiliary current loops are increased.
5. The first embodiment of the invention is suitable for the circuit breaker with the circuit breaking capacity of 63A and below, and the short-circuit breaking capacity is greatly improved to be more than 15kA and even to be 50kA; the second embodiment is applicable to a circuit breaker of 63A or more, for example, for a small-sized circuit breaker of a large current having a rated current of 80A or more, the maximum rated current can be raised to 125A, and the short-circuit breaking capacity can be raised to 10kA or more.
Drawings
FIG. 1 is a schematic diagram of a conventional single-circuit breaker;
FIG. 2 is a schematic diagram of a conventional multi-circuit breaker;
FIG. 3 is a schematic diagram of a first embodiment of the present invention;
fig. 4 is a structural view (closed state) of the first embodiment;
Fig. 5 is a structural view (off state) of the first embodiment;
FIG. 6 is a schematic diagram of a second embodiment of the present invention;
fig. 7 is a structural view (closed state) of the second embodiment;
fig. 8 is a structural view (off state) of a third embodiment;
Wherein: 10. the wire-connecting device comprises a shell, 20, a wire frame, 21, a wire-inlet terminal, 30, a wire-outlet terminal, 40, an electromagnetic mechanism, 41, a movable iron core, 41a, a clamping groove, 42, a coil, 43, a linkage rod, 44, a pushing part, 45, a static contact plate, 46, an elastic piece, 47, a connecting section, 48, a bending section, 49, an arc striking section, 49a, a bulge, 50, a static contact, 60, a movable contact, 70, a heat release mechanism, 71, a bimetallic strip, 72, a movable contact plate, 73, a connecting wire, 74, an auxiliary contact plate, 75, a first auxiliary contact, 76, a second auxiliary contact, 80, a handle, 90, an arc extinguishing device, 91 and an arc striking plate.
Detailed Description
The invention is further described below by means of specific embodiments.
Referring to fig. 3 to 5, a multi-circuit breaker includes a housing 10, an incoming line terminal 21, an outgoing line terminal 30, an electromagnetic mechanism 40, a stationary contact 50, a movable contact 60, a hot release mechanism 70, a handle 80, and the like. The casing 10 is provided with a containing cavity, two sides of the casing are respectively provided with a wire frame 20, and the wire inlet terminal 21 and the wire outlet terminal 30 are respectively arranged on the wire frame 20 in a penetrating manner. The electromagnetic mechanism 40, the stationary contact 50, the movable contact 60, and the thermal release mechanism 70 are located between the two wire frames 20. The handle 80 is located in the middle of the housing 10, and one end of the handle is inserted into the housing 10 and can be connected with the movable contact 60 and the movable iron core 41 through a tripping structure (existing structure, not shown in the figure), and the movable contact 60 and the movable iron core 41 are driven to act by the tripping structure in a linkage manner through operating the handle 80, so that the movable contact 60 is in conductive contact or separation with the stationary contact 50.
The electromagnetic mechanism 40 includes a movable iron core 41, a coil 42, a spring, a stationary iron core, and the like, the coil 42 is wound on the movable iron core 41, and the movable iron core 41 is movable along a coil axis under the action of a coil magnetic field and the spring. One end of the coil 42 is electrically connected to the wire inlet terminal 21. The stationary contact 50 is electrically connected to the coil 41, and the movable contact 60 is electrically connected to the thermal release mechanism 70.
The electromagnetic mechanism 40 further comprises a linkage rod 43 and at least one first auxiliary current loop, which is connected in parallel with the electromagnetic mechanism 40. The link lever 43 is rotatably connected to the housing 10 and has a rotation shaft, one end of the link lever 43 is linked to one end of the movable iron core 41, a locking groove 41a is provided at the end of the movable iron core 41, and the end of the link lever 43 is positioned in the locking groove 41 a. The other end of the linkage rod is provided with a pushing part 44, an included angle is formed between the pushing part 44 and the main body of the linkage rod 43, and the linkage rod 43 and the pushing part 44 are both insulating parts. The first auxiliary current loop may be one, two or more, and the number of pushing parts 44 may correspond to the first auxiliary current loop.
One of the first auxiliary current loops comprises a stationary contact plate 45 and an elastic member 46, the stationary contact plate 45 being provided with a connecting section 47, a bending section 48 and an arc striking section 49. The connecting section 47 is electrically connected to one end of the coil 42. The bending section 48 is connected between the connecting section 47 and the arc striking section 49, and is located at one side of the electromagnetic mechanism 40 opposite to the movable contact 60, and a stationary contact 50 is arranged at the outer side of the bending section 48, and the stationary contact 50 can be in conductive contact with the movable contact 60. The arc striking section 49 is located below the incoming terminal 21 and its end is in abutting contact with the pushing portion 44. The arc-guiding section 49 is provided with a protrusion 49a near the pushing part 44, and when the protrusion 49a contacts the incoming line terminal 21, the first auxiliary current loop is turned on. One end of the elastic piece 46 is fixed, and the other end is propped against the bottom surface of the end part of the arc striking section 49 of the static contact plate 45.
The heat release mechanism 70 includes a bimetal 71, a movable contact plate 72, a connection wire 73, and the like. The movable contact plate 72 is rotatably connected to the housing 10, and has a movable contact 60 at a bottom end of one side thereof, and the other side thereof is electrically connected to one side of the bimetal 71 through a connecting wire 73, and the other side of the bimetal 71 is electrically connected to the outlet terminal 30 through the connecting wire 73. The bimetal 71 is located between the movable contact plate 72 and the outgoing terminal 30, and the connection wire 73 is a flexible connection wire.
The thermal release mechanism 70 is used as an overload protection mechanism of the circuit breaker, when the current value of the circuit breaker is larger than the rated current and overload occurs, the bimetallic strip 71 is overheated and bent, and when the bimetallic strip is bent to a certain extent, the tripping mechanism can trigger the starting touch plate 72 to act, the tripping mechanism is linked, the first auxiliary circuit can be disconnected firstly, and then the electrical connection between the movable contact 60 and the fixed contact 50 is disconnected, or the first auxiliary circuit is disconnected, and meanwhile, the electrical connection between the movable contact 60 and the fixed contact 50 is disconnected.
The invention also comprises an arc extinguishing device 90, wherein the arc extinguishing device 90 is positioned below the static contact plate 45 and is provided with an arc striking plate 91, and the arc striking plate 91 is electrically connected with the bimetallic strip 71 and is matched with the arc striking section 49 of the static contact plate 45 to realize arc extinguishing.
The invention is suitable for the circuit breaker 63A and below, and in normal operation, the static contact 50 on the static contact plate 45 is in conductive contact with the movable contact 60 on the movable contact plate 72, the bulge 49a is in conductive contact with the incoming line terminal 21, and the first auxiliary current loop is connected. With this arrangement, the internal resistance of the circuit breaker is unchanged, i.e., the temperature rise performance is unchanged.
When a short circuit occurs, the movable iron core 41 moves to push the linkage rod 43 and the static contact plate 45, the pushing part 44 rotates and presses down the static contact plate 45 to separate the bulge 49a from the incoming line terminal 21, the first auxiliary current loop is disconnected firstly, then the static contact 50 is separated from the movable contact 60, the multipath electromagnetic mechanism 40 is changed into a single-path electromagnetic mechanism, the multi-turn strong exciting coil of the multipath electromagnetic mechanism can generate stronger electromagnetic force, the static contact 50 is driven to be disconnected from the movable contact 60 quickly, the breaking speed of the circuit breaker is greatly improved, the extinction of an electric arc is enhanced, and the breaking capacity of the circuit breaker is improved.
Example two
Referring to fig. 6 to 8, a multi-circuit breaker has the same main structure as the embodiment, except that: the heat release mechanism 70 further includes at least one second auxiliary current loop, which is connected in parallel to the bimetal 71, and the number of the second auxiliary current loops may be one, two or more. The second auxiliary current loop comprises an auxiliary contact plate 74 rotatably connected in the casing 10, one end of the auxiliary contact plate is electrically connected with the outlet terminal 30 through a connecting wire 73, a first auxiliary contact 75 is arranged at the other end of the auxiliary contact plate, a second auxiliary contact 76 is correspondingly arranged at the top end of the other side of the movable contact plate 72, and when the first auxiliary contact 75 is in conductive contact with the second auxiliary contact 76, the second auxiliary current loop can be connected.
The embodiment is applied to the design of the circuit breaker with rated current above 63A, and in normal operation, the stationary contact 50 on the stationary contact plate 45 is in conductive contact with the movable contact 60 on the movable contact plate 72, the bulge 49a is in conductive contact with the incoming line terminal 21, and the first auxiliary current loop is connected; at the same time, the first auxiliary contact 75 is in conductive contact with the second auxiliary contact 76, and the second auxiliary current loop is closed. By the arrangement, the internal resistance of the circuit breaker is obviously reduced, and the temperature rising performance of the circuit breaker after the rated current is raised to 125A can be ensured to meet the standard requirement.
When the current value of the circuit breaker is greater than the rated current and overload occurs, the bimetallic strip 71 is overheated and bent, and when the bimetallic strip is bent to a certain extent, the tripping mechanism is in linkage, the first auxiliary circuit and the second auxiliary circuit are disconnected firstly, then the electrical connection between the movable contact 60 and the fixed contact 50 is disconnected, or the first auxiliary circuit and the second auxiliary circuit are disconnected, and meanwhile, the electrical connection between the movable contact 60 and the fixed contact 50 is disconnected.
During short circuit, the movable iron core 41 moves to push the linkage rod 43 and the static contact plate 45, the pushing part 44 rotates and presses the static contact plate 45 down to separate the protrusion 49a from the incoming line terminal 21, the static contact plate 45 pushes the movable contact plate 72 to rotate, the first auxiliary contact 75 is separated from the second auxiliary contact 76, namely, the first auxiliary current loop and the second auxiliary current loop are disconnected firstly, and then the static contact 50 is separated from the movable contact 60; or the first and second auxiliary current loops are opened while the stationary contact 50 is also separated from the movable contact 60. After the two auxiliary current loops are disconnected, the circuit breaker becomes a single-path structure, and the short-circuit breaking capacity of the circuit breaker can be kept consistent with that of the single-path circuit breaker, namely, the design reduces the internal resistance of the circuit breaker so that rated current can be increased to 125A, and the short-circuit breaking capacity of the circuit breaker is not reduced and is kept consistent with that before the auxiliary current loops are added.
The foregoing is merely illustrative of specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention by using the design concept shall fall within the scope of the present invention.
Claims (7)
1. A multi-loop circuit breaker comprises a wire inlet terminal, a wire outlet terminal, an electromagnetic mechanism, a stationary contact, a movable contact and a thermal disengaging mechanism; the electromagnetic mechanism is provided with a coil and a movable iron core, one end of the coil is electrically connected with the wire inlet terminal, and the movable iron core is positioned in the coil and can move along the axis of the coil; the fixed contact is electrically connected with the coil, and the movable contact is electrically connected with the hot-off mechanism; the method is characterized in that: the electromagnetic mechanism also comprises a linkage rod and at least one first auxiliary current loop, wherein the first auxiliary current loop is connected with the electromagnetic mechanism in parallel; the linkage rod is rotatably arranged, one end of the linkage rod is linked with one end of the movable iron core, and the other end of the linkage rod is in abutting contact with the first auxiliary current loop; when a short circuit occurs, the movable iron core moves to drive the linkage rod to rotate, so that the first auxiliary current loop is disconnected firstly, and then the fixed contact is separated from the movable contact;
The first auxiliary current loop further comprises a static touch plate and an elastic piece; the other end of the linkage rod is provided with a pushing part; the static contact is positioned on the static contact plate and can be in conductive contact with the movable contact, one end of the static contact plate is electrically connected with the coil and is fixed with the other end of the movable iron core, and the other end of the static contact plate is in abutting contact with the pushing part; one end of the elastic piece is fixed, and the other end of the elastic piece is propped against the other end of the static contact plate;
A bulge is arranged at the position, close to the pushing part, of the static contact plate, and when the bulge is in contact with the incoming line terminal, the first auxiliary current loop is connected; the static contact plate is provided with a connecting section, a bending section and an arc striking section; the connecting section is electrically connected with the coil; the bending section is connected between the connecting section and the arc striking section and is provided with the static contact; the arc striking section is positioned below the electromagnetic mechanism, and one end of the arc striking section is in abutting contact with the pushing part.
2. The multi-circuit breaker of claim 1, wherein: the wire inlet terminal is located between the electromagnetic mechanism and the static contact plate.
3. The multi-circuit breaker of claim 1, wherein: the hot-off mechanism comprises a bimetallic strip and a movable contact plate; the movable contact plate is rotatably arranged, one side of the movable contact plate is provided with the movable contact, the other side of the movable contact plate is electrically connected with one side of the bimetallic strip through a connecting wire, and the other side of the bimetallic strip is electrically connected with the outlet terminal through the connecting wire.
4. A multi-circuit breaker as claimed in claim 3, wherein: the thermal stripping mechanism further comprises at least one second auxiliary current loop which is connected with the bimetallic strip in parallel; and when the movable contact plate is in short circuit, the movable contact plate rotates, the second auxiliary current loop is disconnected firstly, and then the fixed contact is separated from the movable contact.
5. The multi-circuit breaker of claim 4, wherein: the second auxiliary current loop comprises an auxiliary touch plate, and one end of the auxiliary touch plate is electrically connected with the outgoing terminal; the other end of the auxiliary contact plate is provided with a first auxiliary contact, the movable contact plate is correspondingly provided with a second auxiliary contact, and when the first auxiliary contact is in conductive contact with the second auxiliary contact, the second auxiliary current loop is connected.
6. A multi-circuit breaker as claimed in claim 3, wherein: the mobile touch panel also comprises a handle which is connected with the mobile touch panel.
7. A multi-circuit breaker as claimed in claim 3, wherein: the device also comprises an arc extinguishing device, wherein the arc extinguishing device is positioned below the static contact plate and is provided with an arc striking plate, and the arc striking plate is in conductive connection with the bimetallic strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811257160.9A CN109243936B (en) | 2018-10-26 | 2018-10-26 | Multi-loop circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811257160.9A CN109243936B (en) | 2018-10-26 | 2018-10-26 | Multi-loop circuit breaker |
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| Publication Number | Publication Date |
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| CN109243936A CN109243936A (en) | 2019-01-18 |
| CN109243936B true CN109243936B (en) | 2024-07-12 |
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| CN201811257160.9A Active CN109243936B (en) | 2018-10-26 | 2018-10-26 | Multi-loop circuit breaker |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209298052U (en) * | 2018-10-26 | 2019-08-23 | 厦门国研科技有限公司 | A kind of multiloop breaker |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2557353B1 (en) * | 1983-12-26 | 1986-04-11 | Merlin Gerin | MAGNETOTHERMAL TRIGGER IN SHAPE MEMORY MATERIAL, ASSOCIATED WITH A CIRCUIT BREAKER MECHANISM |
| DE19653295A1 (en) * | 1996-12-20 | 1998-06-25 | Abb Patent Gmbh | Overcurrent and short-circuit release for an electrical installation switch |
| CN103594295B (en) * | 2013-11-08 | 2015-11-25 | 上海诺雅克电气有限公司 | The trip gear of residual current action breaker |
| CN205335204U (en) * | 2015-12-21 | 2016-06-22 | 浙江正泰电器股份有限公司 | Thermomagnetic release of circuit breaker |
| CN106531580A (en) * | 2016-11-09 | 2017-03-22 | 首瑞（天津）电气设备有限公司 | Micro breaker and distribution system |
| CN106373836B (en) * | 2016-11-16 | 2018-07-06 | 中欧电气有限公司 | A kind of protection mechanism and with its breaker |
| CN107026059A (en) * | 2017-06-10 | 2017-08-08 | 南京日新科技有限公司 | A kind of multibreak circuit breaker |
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2018
- 2018-10-26 CN CN201811257160.9A patent/CN109243936B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209298052U (en) * | 2018-10-26 | 2019-08-23 | 厦门国研科技有限公司 | A kind of multiloop breaker |
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Effective date of registration: 20240725 Address after: 325000 No. 808, Binhai ninth Road, economic and Technological Development Zone, Wenzhou, Zhejiang Patentee after: WENZHOU DONGJI ELECTRICAL Co.,Ltd. Country or region after: China Address before: Room 601, building C, Jianye Building, No.96, Xiangxing Road, industrial zone, torch hi tech Zone (Xiang'an), Xiamen City, Fujian Province, 361000 Patentee before: XIAMEN GUOYAN TECHNOLOGY Co.,Ltd. Country or region before: China |