CN112071709B - Circuit breaker with leakage protection function - Google Patents
Circuit breaker with leakage protection function Download PDFInfo
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- CN112071709B CN112071709B CN202010885559.2A CN202010885559A CN112071709B CN 112071709 B CN112071709 B CN 112071709B CN 202010885559 A CN202010885559 A CN 202010885559A CN 112071709 B CN112071709 B CN 112071709B
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- circuit breaker
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- 239000000758 substrate Substances 0.000 claims abstract description 56
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- 238000005070 sampling Methods 0.000 claims description 19
- 230000000149 penetrating effect Effects 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 15
- 210000003205 muscle Anatomy 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000005192 partition Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
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- 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
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
- H01H71/0221—Majority of parts mounted on central frame or wall
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
本发明公开了一种带漏电保护功能的断路器，包括有壳体、断路器模块和漏电保护模块，所述壳体至少包括有三个依次排列的第一腔体、第二腔体、第三腔体，所述第一腔体和第二腔体之间通过第一基板分隔，第二腔体和第三腔体之间通过第二基板分隔，所述脱扣线圈组件、线路板设置在第一腔体中，所述第二触头组件、灭弧组件设置在第二腔体中，所述断路器模块设置在第三腔体中，所述第一触头组件和第二触头组件相联动，所述脱扣线圈组件与锁扣之间联动配合，所述零序互感器至少同时置于两个所述腔体内。本发明提供了一种体积较小、内部结构更紧凑的带漏电保护功能的断路器。
The present invention discloses a circuit breaker with a leakage protection function, comprising a housing, a circuit breaker module and a leakage protection module, wherein the housing comprises at least three first cavities, a second cavity and a third cavity arranged in sequence, the first cavity and the second cavity are separated by a first substrate, the second cavity and the third cavity are separated by a second substrate, the tripping coil assembly and the circuit board are arranged in the first cavity, the second contact assembly and the arc extinguishing assembly are arranged in the second cavity, the circuit breaker module is arranged in the third cavity, the first contact assembly and the second contact assembly are linked, the tripping coil assembly and the lock are linked and matched, and the zero-sequence mutual inductor is at least placed in two of the cavities at the same time. The present invention provides a circuit breaker with a leakage protection function that is smaller in size and has a more compact internal structure.
Description
Technical Field
The invention relates to a circuit breaker with a leakage protection function.
Background
The circuit breaker with the leakage protection function in the prior art generally comprises a circuit breaker module and a leakage protection module, wherein the circuit breaker module and the leakage protection module are respectively arranged in two adjacent cavities of the circuit breaker, the leakage protection module comprises a zero sequence transformer, an auxiliary contact support, a circuit board, a tripping coil assembly and other components, flexible wires respectively used for L-phase current carrying and N-phase current carrying are simultaneously arranged in a hole of the zero sequence transformer in a penetrating manner, the circuit breaker module comprises a tripping button, a lock catch, a handle, a resetting device, a main contact support and other components, linkage is realized between the tripping coil assembly and the lock catch through a connecting rod penetrating through the two cavities, and linkage is realized between the main contact support and the auxiliary contact support through a transmission component penetrating through the two cavities.
The internal structure layout of the traditional circuit breaker is unreasonable, the occupied space is more, and a large improvement space is still provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the circuit breaker with the leakage protection function, which has smaller volume and more compact internal structure.
In order to achieve the above purpose, the invention provides a circuit breaker with a leakage protection function, which comprises a shell, a circuit breaker module and a leakage protection module, wherein the circuit breaker module comprises a lock catch and a first contact assembly, the leakage protection module comprises a second contact assembly, an arc extinguishing assembly, a zero sequence transformer, a tripping coil assembly and a circuit board, the shell at least comprises a first cavity, a second cavity and a third cavity which are sequentially arranged, the first cavity and the second cavity are separated by a first substrate, the second cavity and the third cavity are separated by a second substrate, the tripping coil assembly and the circuit board are arranged in the first cavity, the second contact assembly and the arc extinguishing assembly are arranged in the second cavity, the circuit breaker module is arranged in the third cavity, the first contact assembly and the second contact assembly are in linkage, the tripping coil assembly is in linkage fit with the lock catch, and the zero sequence transformer is at least arranged in the two cavities at the same time.
The tripping coil assembly, the circuit board, the second contact assembly, the arc extinguishing assembly and the zero sequence transformer of the leakage protection module are respectively arranged in the first cavity and the second cavity, so that the zero sequence transformer can be at least arranged between the two cavities at the same time, and the lock catch and the tripping coil assembly are in linkage fit, so that the lock catch can be driven by the tripping coil assembly to unlock, the zero sequence transformer is at least arranged in the two cavities at the same time, the inner space of each cavity can be fully utilized, the utilization of the inner space of the circuit breaker is more reasonable, the structure is more compact, the whole volume of the circuit breaker is further reduced, in addition, the circuit board can be isolated from other components of the leakage protection module through the first substrate, and the safety can be improved.
Further, one side of the first substrate corresponding to the second cavity is provided with a pocket, the back of the pocket extends towards the first cavity and protrudes, the zero sequence transformer is embedded in the pocket, a through hole through which the zero sequence transformer can be arranged in the third cavity in a penetrating mode is formed in the second substrate, and a threading hole which is communicated with the first cavity and the second cavity is formed in the pocket.
The arrangement has the advantages that the pocket groove is arranged towards the second cavity, the back of the pocket groove extends towards the first cavity to protrude, when one side of the zero sequence transformer is embedded in the pocket groove, the other side of the zero sequence transformer can penetrate through the through hole to be placed in the third cavity, the whole zero sequence transformer can be arranged between the three cavities in a crossing mode, the zero sequence transformer can be positioned better, the internal structure is compact, the size is reduced, and wiring between the zero sequence transformer and the circuit board is facilitated through the arrangement of the threading holes.
Further, the hole center orientation of the zero sequence transformer is perpendicular to the arrangement direction of the first cavity, the second cavity and the third cavity.
The arrangement has the advantages that as the axial width of the zero sequence transformer is generally narrower, the hole center of the zero sequence transformer faces to be perpendicular to the arrangement direction of the first cavity, the second cavity and the third cavity (namely the width direction of the circuit breaker), more inner space can be reserved for the first cavity, the second cavity and the third cavity, the diameter of the zero sequence transformer can be made larger, and the sensitivity of leakage protection is improved.
Further, the leakage protection module comprises a first current-carrying component used for connecting the wiring seat and the arc extinguishing assembly, the first current-carrying component is formed by processing a hard metal plate, and the first current-carrying component is arranged in the second cavity and penetrates through the hole center of the zero sequence transformer.
The arrangement has the advantages that the first current-carrying component formed by processing the hard metal plate can form a good positioning effect on the zero-sequence transformer when penetrating through the hole of the zero-sequence transformer, the zero-sequence transformer can be kept embedded in the pocket groove, shaking and falling are not easy, and the center penetrating assembly of the zero-sequence transformer is more convenient.
Further, the leakage protection module comprises a second current carrying part, the second current carrying part comprises a first current carrying part, a second current carrying part, a current sampling part and an arc striking part, the first current carrying part and the second current carrying part are respectively welded at two ends of the current sampling part, the first current carrying part is used for connecting a wire holder, the second current carrying part is connected with a fixed contact of the second contact assembly, the current sampling part is composed of a manganese copper resistor, two connecting terminals are arranged at two ends of the second current carrying part corresponding to the current sampling part, and the arc striking part is welded with the second current carrying part.
The current sampling part formed by the manganese copper resistor has a smaller resistance value, the current sampling part is welded with the first current carrying part, the second current carrying part and the arc striking part into a whole, so that the second current carrying part can be used for normal current carrying application of the leakage protection module, two connecting terminals can be used for being electrically connected with a circuit board, load current on the current sampling part can be collected through a micro control chip on the circuit board, further the load current can be converted into a digital signal which can be identified and applied, the subsequent calculation of electricity consumption information such as current, voltage and electricity consumption is facilitated, the arc striking part can be used as a component part of an arc extinguishing assembly, on one hand, the electricity consumption safety can be improved, on the other hand, the internal mechanism of the circuit breaker is changed less, the internal space of the circuit breaker can be saved to the greatest extent, and particularly, the space of the second cavity can be more compact and small, the current sampling part adopting the manganese copper resistor can also reduce the cost.
Further, a slot for embedding and positioning the second current-carrying component is formed in one side of the first substrate corresponding to the second cavity, two connecting terminals laterally extend towards the other side of the first substrate, penetrating holes for the two connecting terminals to penetrate through to the other side of the first substrate are formed in the bottom inner wall of the slot, one side inner wall of the slot is defined by a partition plate integrally formed on one side of the first substrate, a U-shaped notch is formed between the second current-carrying component and the arc striking component in a connecting mode, the partition plate is embedded in the notch, the second current-carrying component and the arc striking component are enabled to be arranged close to two sides of the partition plate respectively, one end of the arc striking component is connected with the second current-carrying part, and a clamping groove matched and clamped with the other end of the arc striking component is formed in the end of the partition plate.
The positioning structure has the advantages that the second current-carrying component can be embedded in the slot on one side of the first substrate to be positioned, the two connecting terminals can penetrate through the penetrating hole on the inner wall of the slot bottom and penetrate out of the other side of the first substrate, connection and electric connection are conveniently carried out on the circuit board in the first cavity, the positioning effect of the second current-carrying component and the first substrate can be improved, circuit layout inside the circuit breaker is convenient, the possibility of short circuit between the circuit board and the second current-carrying component can be reduced, the side wall on one side of the baffle forms the inner wall on one side of the slot, the baffle can form isolation between the second current-carrying component and the arc striking component, the second current-carrying component and the arc striking component can be mutually close to each other without short circuit, safety can be improved, the inner component of the second cavity is more compact, the clamping and positioning is carried out through the clamping groove at the end of the baffle and the other end of the arc striking component in a matched mode, the vibration is not easy to happen on the other end of the arc striking component, and the reliability of positioning of the arc striking component is improved.
Further, one side of the first substrate corresponding to the second cavity is rotatably provided with a second transmission member, the other side of the first substrate is rotatably provided with a first transmission member, the first transmission member comprises a first extension arm and a second extension arm, the first extension arm is used for being in pushing fit with a movable iron core of a tripping coil assembly in the first cavity, the second transmission member comprises a third extension arm and a fourth extension arm, the third extension arm and the second extension arm form pushing fit through first connecting rods penetrating through two sides of the first substrate, the second connecting rods are in pushing fit with the fourth extension arm and comprise second connecting rods, the second connecting rods penetrate through the second substrate and then are fixedly matched with a lock catch, and a reset device matched with the first transmission member is arranged in the first cavity.
The trip coil assembly can sequentially drive the first transmission member, the second transmission member and the lock catch to move when the trip coil assembly acts through the push fit among the first extension arm, the movable iron core, the second extension arm, the third extension arm, the fourth extension arm and the second connecting rod, so that the first contact assembly can be unlocked, and the breaker is opened. Because first transmission component and second transmission component set up respectively in the both sides of first base plate, and second connecting rod and hasp fixed cooperation for still can guarantee the linkage between the two when separating a cavity between trip coil assembly and the hasp, overall structure is simple, and the linkage effect is stable, can also make the first extension arm of first transmission component continuously compress tightly on movable iron core through resetting means, is convenient for trip reset.
Further, the groove is formed in the other side of the first substrate, a table top is arranged at a position adjacent to the groove, the first transmission member comprises a cylindrical first base, the first extension arm and the second extension arm are respectively arranged at two axial ends of the first base, the first extension arm is close to the table top, the second extension arm is close to the inner wall of the groove bottom, the trip coil assembly is arranged in the groove, and the second extension arm is arranged between the trip coil assembly and the inner wall of the groove bottom.
The setting has the advantages that the tripping coil assembly is arranged in the groove, and the second extension arm is arranged between the tripping coil assembly and the inner wall of the bottom of the groove, so that the internal structure of the first cavity is more compact, and the whole volume of the circuit breaker is further reduced.
Further, the inner wall is provided with curved protruding muscle at the bottom of the recess, protruding muscle's shape and the motion track looks adaptation of second extension arm, the second extension arm is followed protruding muscle surface motion slides, the inner wall is provided with banding notch at the bottom of the recess, and the one end of notch sets up towards the second extension arm, and the other end of notch is provided with the spliced pole, resetting means is including setting up the extension spring in the notch, the tip of second extension arm is provided with the hanging hole, the both ends of extension spring link with hanging hole and spliced pole respectively.
The arrangement has the advantages that friction force between the second extension arm and the inner wall of the bottom of the groove can be reduced by the convex rib, abrasion is reduced, the rotation effect of the first transmission member is improved, the notch can accommodate the tension spring to a certain extent, excessive bending of the tension spring can be prevented, stability of the elastic acting force direction of the tension spring can be guaranteed, interference between the spring and the tripping coil assembly can be prevented, and positioning effects of two ends of the spring are improved by the aid of the hanging hole and the connecting column.
Further, the second transmission member comprises a disc-shaped second base part, the third extension arm and the fourth extension arm are distributed on the outer circumferential surface of the second base part, the third extension arm and the fourth extension arm simultaneously move and slide along the surface of one side of the first substrate, the first connecting rod is arranged at the end part of the third extension arm, a notch is arranged on one side of the first substrate, the end part of the fourth extension arm is positioned at the notch, and the end part of the second connecting rod extends into the notch.
The arrangement has the advantages that the stability of the second transmission member during rotation is improved, the second connecting rod cannot contact with the other side of the first base plate, transmission failure is not easy to occur between the second connecting rod and the fourth extension arm, and the linkage effect between the end part of the second connecting rod and the fourth extension arm is improved.
Drawings
FIG. 1 is an exploded view of an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of an embodiment of the present invention;
FIG. 3 is an assembly view of the other side of the first substrate according to an embodiment of the present invention;
fig. 4 is an assembly diagram of a first current carrying component and a zero sequence transformer in an embodiment of the invention;
FIG. 5 is a block diagram of a second current carrying component in an embodiment of the invention;
FIG. 6 is an exploded view of a second current carrying member in an embodiment of the invention;
FIG. 7 is an assembly view of one side of a first substrate according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating a structure of a second substrate facing a second cavity according to an embodiment of the present invention;
FIG. 9 is an assembly view of a first transmission member in an embodiment of the present invention;
FIG. 10 is a diagram showing a structure of a first substrate side according to an embodiment of the present invention;
FIG. 11 is a block diagram of an operating mechanism in an embodiment of the invention;
FIG. 12 is a diagram illustrating a structure of the other side of the first substrate according to an embodiment of the present invention;
FIG. 13 is a block diagram of a first drive component in an embodiment of the present invention;
FIG. 14 is a block diagram of a second drive member according to an embodiment of the present invention;
FIG. 15 is a partial explosion of FIG. 1 according to an embodiment of the present invention;
fig. 16 is a partial explosion fig. 2 of an embodiment of the present invention.
Detailed Description
The embodiment of the circuit breaker with the leakage protection function is shown in fig. 1-16, and comprises a shell 10, and a circuit breaker module and a leakage protection module which are arranged on the shell 10, wherein the circuit breaker module mainly comprises an operating mechanism, a first contact assembly and the like, the operating mechanism comprises a lock catch 1111, a jump buckle 1112, a handle 1113 and the like, the first contact assembly comprises a first contact support 1121, a first moving contact 1122 arranged on the first contact support 1121, and a first fixed contact which is matched with the first moving contact 1122 to be opened and closed, the leakage protection module mainly comprises a second contact assembly, an arc extinguishing assembly 122, a zero sequence transformer 123, a tripping coil assembly 124, a circuit board 125 and the like, the second contact assembly comprises a second contact support 1211, a second moving contact 1212 arranged on the second contact support 1211, and a second fixed contact 1213 which is matched with the second moving contact 1212 to be opened and closed, the zero sequence transformer 123 comprises a magnetic ring and a secondary winding wound on the magnetic ring, and the tripping coil assembly 124 comprises a movable iron core 1241.
The casing 10 includes at least three first cavities 101, second cavities 102, and third cavities 103 arranged in sequence, the first cavities 101 and the second cavities 102 are separated by a first substrate 104, the second cavities 102 and the third cavities 103 are separated by a second substrate 105, the trip coil assembly 124 and the circuit board 125 are disposed in the first cavities 101, the second contact assembly and the arc extinguishing assembly 122 are disposed in the second cavities 102, the breaker module is disposed in the third cavities 104, the first contact assembly and the second contact assembly are in linkage fit, in particular, synchronous movement is realized between a first contact support 1121 of the first contact assembly and a second contact support 1211 of the second contact assembly by a connecting member, a return spring is connected between the first contact support 1121 or the second contact support 1211 and the casing 10, the trip coil assembly 124 is in linkage fit with a lock 1111, and the zero sequence transformer 123 is disposed in at least two cavities. Because the space of the first cavity 101 is relatively abundant, the circuit board 125 is arranged in the first cavity 101, so that the circuit board 125 can be made larger, more chips and circuit elements can be integrated, and the functions of the circuit breaker such as electricity information detection, internet of things and the like can be conveniently expanded.
When the circuit breaker is switched on, the handle 1113 drives the trip buckle 1112 to be buckled with the lock buckle 1111 and simultaneously keeps the circuit in a switch-on state, and when electric leakage occurs, the lock buckle 1111 is driven to unlock the trip buckle 1112 based on the action of the movable iron core 1241 of the trip coil assembly 124, and the first contact support 1121 and the second contact support 1211 are driven to simultaneously reset through the reset spring, so that the circuit is disconnected.
The zero sequence transformer 123 can be placed in the first cavity 101, the second cavity 102 and the third cavity 103 at the same time, but in order to enable the zero sequence transformer 123 to be better positioned and improve the safety of products, a pocket 1041 is arranged on one side of the first substrate 104 corresponding to the second cavity 102, the back of the pocket 1041 extends and protrudes towards the first cavity 101 (as shown in fig. 2 and 3), the zero sequence transformer 123 is embedded in the pocket 1041, a through hole 1051 through which the zero sequence transformer 123 can penetrate through the third cavity 103 is formed in the second substrate 105, a threading hole 10411 which is communicated with the first cavity 101 and the second cavity 102 is formed in the pocket 1041, the zero sequence transformer 123 can be positioned, and also can be isolated from a component placed in the first cavity 101, the safety is improved, the back of the pocket 1041 extends towards the first cavity 101, when the zero sequence transformer 123 is embedded in the pocket 1041, meanwhile, the space occupied by the first cavity 101 and the first cavity 101 can be fully reduced, and the whole space occupied by the product can be fully reduced. The threading hole 10411 can be used for the secondary winding of the zero sequence transformer 123 to penetrate between the first cavity 101 and the second cavity 102, so that the wiring with the circuit board 125 is facilitated, and a control circuit capable of converting the secondary winding induction current into a current signal and controlling the operation of the silicon controlled rectifier is integrated on the circuit board 125.
The hole center of the zero sequence transformer 123 may be disposed towards the arrangement direction of the first cavity 101, the second cavity 102 and the third cavity 103, but because the axial width of the zero sequence transformer 123 is generally narrower, in order to occupy the internal space of the cavity as little as possible, and improve the space utilization, the hole center of the zero sequence transformer 123 is preferably disposed towards the arrangement direction perpendicular to the arrangement direction of the first cavity 101, the second cavity 102 and the third cavity 103.
The leakage protection module comprises a first current-carrying component 126 for connecting one of N phases of wire holders and the arc extinguishing assembly 122, the first current-carrying component 126 is formed by processing a hard metal plate, and the first current-carrying component 126 is arranged in the second cavity 102 and penetrates through the hole center of the zero sequence transformer. The first current carrying component 126 is used for carrying current in the N phase, and of course, in addition to the first current carrying component 126, the circuit breaker module further includes a flexible wire (not shown in the drawing) for carrying current in the L phase, which is inserted at the hole center of the zero sequence transformer 3, and the flexible wire can be inserted between the first cavity 101 and the second cavity 102 through the through hole 1051, so as to facilitate the insertion arrangement of the circuit.
As shown in fig. 5, the first current-carrying component 126 includes a first connecting portion 1261, a second connecting portion 1262 and a third connecting portion 1263, where the first connecting portion 1261 and the third connecting portion 1263 are welded or integrally formed at two ends of the second connecting portion 1262, the second connecting portion 1262 is inserted into a hole of the zero-sequence transformer 123, the first connecting portion 1261 and the third connecting portion 1263 are respectively matched with two axial sides of the zero-sequence transformer 123 to limit, the first connecting portion 1261, the second connecting portion 1262 and the third connecting portion 1263 are integrally formed and bent by the same metal plate, the first connecting portion 1261 and the third connecting portion 1263 are bent in a radial direction of the zero-sequence transformer 123, so that the zero-sequence transformer 123 can be limited, and meanwhile, the first connecting portion 1261 is welded with an arc striking piece 1221, the striking piece 1221 is a component part of the arc extinguishing assembly 122, the third connecting portion 1263 is a wiring board, and the wiring board is a component part of the wiring seat, so that the first connecting portion 126, the striking piece 1221 and the whole current-carrying component are welded together, and the number of the electric current-carrying component is reduced, and the electric leakage module is more convenient to manufacture.
The pocket 1041 comprises a circular arc-shaped concave wall 10412 matched with the outer contour of the zero-sequence transformer 123, so that the contact area between the pocket 1041 and the zero-sequence transformer 123 is increased, and the positioning stability is improved.
As shown in fig. 5 and 6, the leakage protection module further includes a second current-carrying component 127, the second current-carrying component 127 includes a first current-carrying portion 1271, a second current-carrying portion 1272, a current sampling portion 1273, and an arc striking component 1274, the first current-carrying portion 1271 and the second current-carrying portion 1272 are respectively welded at two ends of the current sampling portion 1273, the first current-carrying portion 1271 is used for connecting another wire holder of the N phase, the second current-carrying portion 1272 is connected with the second fixed contact 1213 of the second contact assembly, the current sampling portion 1273 is formed by a manganese resistor, two connecting terminals 12731 are disposed at two ends of the second current-carrying portion 127 corresponding to the current-carrying portion 1273, the arc striking component 1274 is welded with the second current-carrying portion 1272, the arc striking component 1274 and the second current-carrying component 127 are welded into a whole, so as to facilitate assembly, the two connecting terminals 12731 are preferably integrally formed at two ends of the current sampling portion 1273, and in other examples, the two connecting terminals 12731 may be integrally formed at the two ends of the current-carrying portion 1272, respectively. The micro control chip can collect load current at two ends of the current sampling part 1273, the collected load current can be converted into a digital signal through a current calculation circuit, and a specific current value can be obtained finally according to calculation.
One end of the first current carrying portion 1271 connected with the current sampling portion 1273 is provided with an inclined section 12711 extending obliquely in a lateral direction, the other end of the first current carrying portion 1271 is bent downwards and integrally connected with a wiring board 12712, the wiring board 12712 is a component part of a wiring seat and is used for connecting an N-phase wire, the inclined section 12711 enables the second current carrying component 127 to have a certain limiting effect in the length direction, positioning and matching with the first substrate 104 are facilitated, and on the other hand, position layout of the wiring seat is also facilitated.
One end of the second current carrying portion 1272 is connected with the current sampling portion 1273, a connecting piece 1276 is formed by bending the other end of the second current carrying portion 1272, the connecting piece 1276 is provided with a first welding end face 1276a and a second welding end face 1276b which are oppositely arranged, the second fixed contact 1213 is welded on the first welding end face 1276a, the second fixed contact 1213 adopts silver points, the second welding end face 1276b is welded with the arc striking component 1274 in a matched mode, the area of a welding position can be increased through arrangement of the first welding end face 1276a and the second welding end face 1276b, welding effect is improved, welding of the second fixed contact 1213 and the arc striking component 1274 is not interfered with each other, and production and processing are convenient.
The end of the connecting piece 1276 forms a third welding end face 1276c, one end of the arc striking component 1274 welded with the connecting piece 1276 is bent to form an L-shaped notch 12741, two adjacent inner walls of the L-shaped notch 12741 are respectively welded with the second welding end face 1276b and the third welding end face 1276c in a matching way, the shape of the L-shaped notch 12741 is matched with one end of the arc striking component 1274, and then the welding is performed through the two welding end faces, so that the welding stability can be improved.
The first substrate 104 is provided with a slot 1042 corresponding to one side of the second cavity 102 for embedding and positioning the second current-carrying component 127, two connecting terminals 12731 extend laterally towards the other side of the first substrate 104, a penetrating hole 1043 for the two connecting terminals 12731 to penetrate through to the other side of the first substrate 104 is formed in the bottom inner wall of the slot 1042, one side inner wall of the slot 1042 is defined by a partition 1044 integrally formed at one side of the first substrate 104, the inclined section 12711 extends towards the other side of the first substrate 104, the slot 1042 is provided with an opening corresponding to the inclined section 12711 and matched with the opening in embedding and limiting, the other end of the arc-striking component 1274 is approximately parallel to the second current-carrying component 127, a U-shaped notch 1275 is formed between the second current-carrying component 127 and the arc-striking component 1274, the partition 1044 is embedded in the notch 5 and enables the second current-carrying component 127 and the arc-striking component 1274 to be respectively arranged close to two sides of the partition 1044, one end of the arc-striking component 1044 is connected with the second portion 1042, the other end of the partition 1274 is provided with a notch 1274, the other end of the arc-striking component 1274 is matched with the arc-striking component 1274, and the arc-striking component 1274 is prevented from shaking, and the arc-striking component 1274 is arranged in the other end of the arc-striking component 41.
The first substrate 104 is rotatably provided with a second transmission member 22 corresponding to one side of the second cavity 102, the other side of the first substrate 104 is rotatably provided with a first transmission member 21, the first transmission member 21 comprises a first extension arm 211 and a second extension arm 212, the first extension arm 211 is used for being in push fit with a movable iron core 1241 of a trip coil assembly 124 in the first cavity 101, the second transmission member 22 comprises a third extension arm 221 and a fourth extension arm 222, a push fit is formed between the third extension arm 221 and the second extension arm 212 through a first connecting rod 23 penetrating through two sides of the first substrate 104, the second connection rod 24 is in push fit with the fourth extension arm 222 and is fixedly matched with a lock catch 1111 after penetrating through the second substrate 105, the second connection rod 24 can also be integrally formed with the lock catch 1111, and a reset device matched with the first transmission member 21 is arranged in the first cavity 101.
When the movable iron core 1241 moves under the electromagnetic action, the first extension arm 211 can push the first transmission member 21 to integrally rotate, then the second extension arm 212 of the first transmission member 21 drives the third extension arm 221 and the second transmission member 22 to integrally rotate through the first connecting rod 23, and then the second connecting rod 24 pushes the lock catch 1111 to rotate towards the tripping direction, so that tripping is realized, and the circuit breaker trips.
The other side of the first substrate 104 is provided with a groove 1045, a table top 1046 is disposed at a position adjacent to the groove 1045, the first transmission member 21 includes a first cylindrical base 213, a shaft is disposed at an axial position of the first base 213 in a penetrating manner, the first extension arm 211 and the second extension arm 213 are disposed at two axial ends of the first base 213, the first extension arm 211 is disposed near the table top 1046, the second extension arm 213 is disposed near a bottom inner wall of the groove 1045, the trip coil assembly 124 is disposed in the groove 1045, the second extension arm 213 is disposed between the trip coil assembly 124 and the bottom inner wall of the groove 1045, a mounting plate 1047 is disposed in the groove 1045 and mounted and positioned at two ends of the trip coil assembly 124 in a matching manner, and a certain gap is formed between the trip coil assembly 124 and the second extension arm 213 through the mounting plate 1047 to prevent mutual interference.
The inner wall is provided with curved protruding muscle 1048 at the bottom of recess 1045, protruding muscle 1048's shape and the motion track looks adaptation of second extension arm 213, second extension arm 213 is followed protruding muscle 1048 surface motion slides, protruding muscle 1048 can use the second extension arm 213 to separate certain distance between the inner wall at the bottom of recess 1045, reduces wearing and tearing between second extension arm 213 and the first base plate 104, protruding muscle 1048 one end is provided with spacing protruding 1049 with the cooperation of second extension arm 213, and spacing protruding 1049 can only set up in protruding muscle 1048's one end department, also can set up in protruding muscle 1048's both ends department simultaneously.
The bottom inner wall of the groove 1045 is provided with a strip-shaped notch 1050, the notch 1050 is provided with two inclined surfaces which are oppositely arranged, one end of the notch 1050 is arranged towards the second extension arm 213, the other end of the notch 1050 is provided with a connecting column 1051, the resetting device comprises a tension spring 3 arranged in the notch 1050, the end part of the second extension arm 213 is provided with a hanging hole 2131, and two ends of the tension spring 3 are respectively hung with the hanging hole 2131 and the connecting column 1051.
The first extension arm 211 has a circular arc protrusion 2111 in contact with the movable iron core 1241, and the circular arc protrusion 2111 enables the first extension arm 211 to keep good contact with the movable iron core 1241 when rotating to various angles, so that the stress is more stable, the abrasion between the two can be reduced, and the use effect is improved.
The second transmission member 22 includes a disc-shaped second base 223, the third extension arm 221 and the fourth extension arm 222 are disposed on an outer circumferential surface of the second base 223, a rotation shaft is disposed at a center position of the second base 223 in a penetrating manner, the second base 223, the third extension arm 221 and the fourth extension arm 222 simultaneously slide along a surface of one side of the first substrate 104, the first connection rod 23 is disposed at an end portion of the third extension arm 221, a notch 1052 is disposed at one side of the first substrate 104, an end portion of the fourth extension arm 222 is disposed at the notch 1052, an end portion of the second connection rod 24 extends into the notch 1052 (a position lower than an end surface of the first substrate 104 and the second transmission member 22 in a sliding manner), and the notch 1052 is used for receiving the second contact assembly An Zhuangrong.
The first substrate 104 is provided with an arc-shaped guide groove for the first connecting rod 23 and/or the second connecting rod 24 to pass through.
The above embodiment is only one of the preferred embodiments of the present invention, and common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the scope of the present invention.
Claims (9)
1. The circuit breaker with the leakage protection function comprises a shell, a circuit breaker module and a leakage protection module, wherein the circuit breaker module comprises a lock catch and a first contact assembly, the leakage protection module comprises a second contact assembly, an arc extinguishing assembly, a zero sequence transformer, a tripping coil assembly and a circuit board, the shell at least comprises a first cavity, a second cavity and a third cavity which are sequentially arranged, the first cavity and the second cavity are separated through a first substrate, the second cavity and the third cavity are separated through a second substrate, the circuit breaker is characterized in that the tripping coil assembly and the circuit board are arranged in the first cavity, the second contact assembly and the arc extinguishing assembly are arranged in the second cavity, the circuit breaker module is arranged in the third cavity, the first contact assembly and the second contact assembly are linked, synchronous movement is realized between contact support of the first contact assembly and contact support of the second contact assembly through a connecting member, the tripping coil assembly and the lock catch are matched, the tripping coil assembly is at least arranged in the first cavity and the second cavity at least, or the second cavity is arranged in the second cavity and extends towards the first groove, the zero sequence groove is correspondingly arranged in the second groove is formed in the second groove, and the groove is correspondingly arranged in the second groove.
2. The circuit breaker with the leakage protection function according to claim 1, wherein the hole center of the zero sequence transformer faces to be perpendicular to the arrangement direction of the first cavity, the second cavity and the third cavity.
3. The circuit breaker with the leakage protection function according to claim 2, wherein the leakage protection module comprises a first current carrying component for connecting the wire holder and the arc extinguishing component, the first current carrying component is formed by processing a hard metal plate, and the first current carrying component is arranged in the second cavity and penetrates through a hole center of the zero sequence transformer.
4. The circuit breaker with leakage protection function according to claim 1, wherein the leakage protection module comprises a second current carrying component, the second current carrying component comprises a first current carrying part, a second current carrying part, a current sampling part and an arc striking component, the first current carrying part and the second current carrying part are respectively welded at two ends of the current sampling part, the first current carrying part is used for connecting a wire holder, the second current carrying part is connected with a fixed contact of the second contact assembly, the current sampling part is composed of a manganese copper resistor, two connecting terminals are arranged at two ends of the second current carrying component corresponding to the current sampling part, and the arc striking component is welded with the second current carrying part.
5. The circuit breaker with leakage protection function according to claim 4, wherein one side of the first substrate corresponding to the second cavity is provided with a slot for embedding and positioning a second current-carrying component, two connecting terminals laterally extend towards the other side of the first substrate, a penetrating hole for the two connecting terminals to penetrate through to the other side of the first substrate is formed in the bottom inner wall of the slot, one side inner wall of the slot is defined by a baffle integrally formed on one side of the first substrate, a U-shaped notch is formed between the second current-carrying component and the arc striking component, the baffle is embedded in the notch, the second current-carrying component and the arc striking component are respectively arranged close to two sides of the baffle, one end of the arc striking component is connected with the second current-carrying part, and a clamping groove matched with and clamped and positioned with the other end of the arc striking component is formed in the end of the baffle.
6. The circuit breaker with leakage protection function according to claim 1, wherein the first substrate is provided with a second transmission member corresponding to one side of the second cavity in a rotating manner, the other side of the first substrate is provided with a first transmission member in a rotating manner, the first transmission member comprises a first extension arm and a second extension arm, the first extension arm is used for being in pushing fit with a movable iron core of the trip coil assembly in the first cavity, the second transmission member comprises a third extension arm and a fourth extension arm, the third extension arm and the second extension arm form pushing fit through first connecting rods penetrating through two sides of the first substrate, the second connecting rods are provided with second connecting rods in pushing fit with the fourth extension arm, the second connecting rods penetrate through the second substrate and are fixed in locking fit, and the first cavity is provided with a reset device matched with the first transmission member.
7. The circuit breaker with leakage protection function according to claim 6, wherein the other side of the first substrate is provided with a groove, a table top is arranged at a position adjacent to the groove, the first transmission member comprises a cylindrical first base, the first extension arm and the second extension arm are respectively arranged at two axial ends of the first base, the first extension arm is arranged close to the table top, the second extension arm is arranged close to the inner wall of the groove bottom, the trip coil assembly is arranged in the groove, and the second extension arm is arranged between the trip coil assembly and the inner wall of the groove bottom.
8. The circuit breaker with leakage protection function according to claim 7, wherein the inner wall of the bottom of the groove is provided with an arc-shaped convex rib, the shape of the convex rib is matched with the movement track of the second extension arm, the second extension arm moves and slides along the surface of the convex rib, the inner wall of the bottom of the groove is provided with a strip-shaped notch, one end of the notch faces the second extension arm, the other end of the notch is provided with a connecting column, the reset device comprises a tension spring arranged in the notch, the end part of the second extension arm is provided with a hanging hole, and two ends of the tension spring are respectively hung with the hanging hole and the connecting column.
9. The circuit breaker with leakage protection according to claim 6, wherein the second transmission member comprises a disc-shaped second base portion, the third extension arm and the fourth extension arm are distributed on the outer circumferential surface of the second base portion, the third extension arm and the fourth extension arm simultaneously move and slide along the surface of one side of the first base plate, the first connecting rod is arranged at the end portion of the third extension arm, a notch is arranged at one side of the first base plate, the end portion of the fourth extension arm is located at the notch, and the end portion of the second connecting rod extends into the notch.
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| CN202010885559.2A CN112071709B (en) | 2020-08-28 | 2020-08-28 | Circuit breaker with leakage protection function |
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| JP3726709B2 (en) * | 2001-05-21 | 2005-12-14 | 松下電工株式会社 | Circuit breaker zero phase current transformer arrangement structure |
| KR100918110B1 (en) * | 2009-01-23 | 2009-09-22 | 주식회사 대륙 | Trip circuit assembly of earth leakage breaker |
| CN102683130B (en) * | 2011-03-09 | 2016-03-23 | 上海电科电器科技有限公司 | Circuit breaker with optimized space allocation |
| CN207834227U (en) * | 2018-02-02 | 2018-09-07 | 深圳曼顿科技有限公司 | Miniature circuit breaker with novel zero sequence mutual inductor installation structure |
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