GB2630203A

GB2630203A - Double arc-extinguishing cover type leakage protector

Info

Publication number: GB2630203A
Application number: GB2411247.6A
Authority: GB
Inventors: Xu Xiangbing; Shen Liujuan; Zhang Yuhang
Original assignee: Maxge Electric Tech Co Ltd
Current assignee: Maxge Electric Tech Co Ltd
Priority date: 2022-01-10
Filing date: 2023-01-09
Publication date: 2024-11-20
Also published as: CN114360972A; CN114360972B; GB202411247D0; DE112023000570T5; WO2023131321A1

Abstract

Disclosed in the present invention is a double arc-extinguishing cover type leakage protector, comprising a protector housing (1). An actuating mechanism (2) and a power-taking mechanism are respectively arranged in the protector housing (1), one side of the power-taking mechanism is connected to a handle (3), the other side of the power-taking mechanism is connected to an L-pole electromagnetic system (4), and a circuit board (6) is arranged on the outer side of the L-pole electromagnetic system (4). The power-taking mechanism comprises a handle spring (7) located inside the handle (3), one end of the handle spring (7) is connected to the circuit board (6), and the other end of the handle spring (7) is provided with a power-taking unit (8). The power-taking unit (8) is connected to the protector housing (1) in a buckling way, and one side of the power-taking unit (8) is electrically connected to the L-pole electromagnetic system (4) by means of an elastic pressing piece (801). The present invention has the characteristics of high working stability, convenient wiring and excellent arc extinguishing effect.

Description

DOUBLE ARC-EXTINGUISHING COVER TYPE LEAKAGE PROTECTOR

FIELD

[0001] The present application relates to a leakage protector, and in particular to a double arc-extinguishing cover type leakage protector.

BACKGROUND

[0001] In a conventional leakage protector, a circuit board is directly connected to a leading-out terminal through wires. When an electric leakage is detected in the circuit board, an electromagnetic mechanism is driven to activate a trip unit to disconnect a moving contact from a static contact, achieving a leakage protection of the leakage protector. Meanwhile, after the leakage protector trips, a power supply to the circuit board is cut off, which causes the trip unit to be disconnected accordingly. However, an operator often reverses the leading-in and leading-out terminals when wiring, that is, an external circuit is connected from the leading-out terminal and an internal circuit is connected from the leading-in terminal.

As a result, when the leakage current passes through the circuit board to switch out the trip unit, the trip unit will not be disconnected together with the tripping of the leakage protector, but is still being powered until it burns out, greatly shortening the service life of the trip unit. Meanwhile, the circuit board is also in a continuous power-on state, causing significant losses.

[0002] To solve this problem, in the existing leakage protector, a power-taking mechanism is provided between an L-pole leading-in terminal and the circuit board, so that the disconnection action of the leakage protector can drive the power-taking mechanism to be disconnected, thereby causing the circuit board to be powered off. For example, in the Chinese patent No. ZL202021880008.9 titled with "power-taking mechanism for circuit breakers", a power-taking mechanism is provided between two actuating mechanisms, so that the action of the actuating mechanisms can drive the moving contact spring and the power-taking spring to be disconnected from each other, thereby disconnecting the circuit board. Although this structure can achieve the disconnection action of the circuit board, in the actual use, the two contacts immediately release a large amount of arc and generate sparks just when the circuit is disconnected, causing the temperature at the contact position to reach 6000C in a short period of time. This defect leads to a high-temperature carbonization at the contact position of the power-taking mechanism due to multiple disconnection actions of the leakage protector, thereby affecting the energizing stability and the leakage protection effect of the circuit board. On the other hand, the power-taking mechanism also needs to be connected to an L-pole wiring board and a circuit board, respectively, through separate wires during installation, which may further increase the complexity of the circuit and the difficulty of wiring for the operator on the basis of the existing leakage protector.

[0003] In addition, a test button needs to be further installed in the leakage protector. When the test button is pressed, the test spring is driven to contact and trigger the circuit board to simulate a leakage effect, so as to test whether the leakage switch action of the leakage protector is normal. Due to the fact that the existing test spring is connected to the L pole and the circuit board, respectively, through two separate wires, the complexity of the leakage protector circuit is further increased, which requires the operator to spend more effort on manual wiring and reduces the assembly efficiency of the leakage protector.

[0004] In order to install the above structure and complete the corresponding wiring it will occupy the free space inside the leakage protector. Due to a relatively small internal space of the leakage protector itself this additionally provided structure further reduces a space for other functional components and actuating mechanisms. As a result, only one arc extinguishing cover can be placed in the existing bipolar leakage protector, causing the problem of poor arc extinguishing effect of the leakage protector.

[0005] Therefore, the existing leakage protectors have the problems of poor operation stability, difficulty in wiring and poor arc extinguishing effect.

SUMMARY

[0006] An object of the present application is to provide a double arc-extinguishing cover type leakage protector, which has advantages of good operation stability, ease of wiring and good arc extinguishing effect.

[0007] There is provided a double arc-extinguishing cover type leakage protector including a protector housing wherein an actuating mechanism and a power-taking mechanism are provided in the protector housing one side of the power-taking mechanism is connected to a handle, the other side of the power-taking mechanism is connected to an L-pole electromagnetic system, a circuit board is provide at an outer side of the L-pole electromagnetic system, the power-taking mechanism includes a handle spring located in the handle, one end of the handle spring is connected to the circuit board and the other end of the handle spring is provided with a power-taking part, the power-taking part is fixed to the protector housing, and one side of the power-taking part is electrically connected to the L-pole electromagnetic system through an elastic pressing piece.

[0008] In the double arc-extinguishing cover type leakage protector, one end of the handle spring extends to the outside of the handle and is provided with a rotating part. A first energizing contact and a first disconnecting contact are provided on the rotating part, and a second energizing contact and a second disconnecting contact are provided on the power-taking part at different positions. When the leakage protector is connected, the second energizing contact and the first energizing contact are in contact with each other; and when the leakage protector is disconnected, the second disconnecting contact and the first disconnecting contact are separated from each other.

[0009] In the double arc-extinguishing cover type leakage protector, the power-taking part is provided with an inclined part that is inclined towards the rotating part, A protruding part is provided at one end of the inclined part. The second energizing contact is located on the protruding part, and the second disconnecting contact is located on the inclined part.

[0010] In the double arc-extinguishing cover type leakage protector, the rotating part is arc-shaped, and the first energizing contact and the first disconnecting contact are arranged at two ends of the rotating part, respectively. A pressing part is provided at an end of the rotating part close to the first disconnecting contact, and the first disconnecting contact is located on the pressing part.

[0011] In the double arc-extinguishing cover type leakage protector, a direction of rotating the handle when the leakage protector is disconnected is defined as a direction A. The first energizing contact is located at an end of the rotating part close to the direction A, and the first disconnection contact is located at an end of the rotating part away from the direction A. [0012] In the double arc-extinguishing cover type leakage protector, a button spring is electrically connected to an end of the handle spring away from the power-taking part. One end of the button spring is connected to the circuit board, and the other end of the button spring is provided with a testing part. A button and the contact spring are respectively provided on both sides of the testing part, and an end portion of the contact spring is connected to the circuit board.

[0013] In the double arc-extinguishing cover type leakage protector, an N-pole arc extinguishing cover is provided on the protector housing at the side of the circuit board. An L-pole arc extinguishing cover is provided on a side of the protector housing away from the circuit board, and the circuit board and the L-pole arc extinguishing cover are separated from each other by a partition plate.

[0014] In the double arc-extinguishing cover type leakage protector, an L-pole leading-in terminal, an N-pole leading-in terminal, an L-pole leading-out terminal, and an N-pole leading-out terminal are provided at two ends of the protector housing, respectively. An N-pole moving contact and an N-pole static contact are provided at two sides of the N-pole arc extinguishing cover, respectively. The N-pole leading-out terminal is connected to an outer part of the N-pole moving contact, and the N-pole leading-in terminal is connected to an outer part of the N-pole static contact. An L-pole moving contact and an L-pole static contact are provided at an outer side of the L-pole arc extinguishing cover. The L-pole leading-out terminal is connected to an outer part of the L-pole moving contact, and the L-pole leading-in terminal is connected to an outer part of the L-pole static contact through the L-pole electromagnetic system.

[0015] In the double arc-extinguishing cover type leakage protector, one end of the L-pole moving contact is connected to the L-pole leading-out terminal through a thermoelement assembly. One side of the thermoelement assembly is connected to a first arc striking piece, and an end of the first arc striking piece extends to one side of a L-pole arc extinguishing cover. One side of the N-pole leading-out terminal is connected to a second arc striking piece, and an end of the second arc striking piece extends to one side of the N-pole arc extinguishing cover.

[0016] In the double arc-extinguishing cover type leakage protector, the L-pole arc extinguishing cover is located below the L-pole electromagnetic system, and the N-pole arc extinguishing cover is located below the actuating mechanism.

[0017] Compared with the existing technology, the present application has the following characteristics.

[0018] (1) In the present application, the circuit board is energized by the cooperation of a handle spring and a power-taking part, so that the contact-disconnected position of the power-taking mechanism can be reflected at the handle instead of the actuating mechanism in the existing technology, that is, the disconnection of the contacts is achieved by switching out with the handle after the leakage protector is disconnected. During a leakage protection of the leakage protector, the trip unit first drives the actuating mechanism to disconnect the moving contact from the static contact, and after completing the action the actuating mechanism drives the handle to rotate and switch out, so that the switch-out time as a result of the rotation of the handle is delayed by the cooperation and linkage movement of the actuating mechanism to be later than the disconnection time of the moving contact and the static contact.

The moving contact and the static contact can complete the arc releasing at the interval time, thereby reducing the sparks generated by the disconnection of the rotating part and the power-taking part, which greatly lowers the possibility of the high-temperature carbonization at the contact position.

100191 (2) By the positional and structural cooperation of the electromagnetic system, the circuit board and the power-taking unit, the power-taking part can be fixed to the protector housing by the elastic pressing piece during installation. Meanwhile, the electromagnetic system can achieve an electrical connection by pressing the elastic pressing piece during installation, so that there is no need for separate wires to connect the power-taking unit to the wiring board for power connection, effectively reducing the complexity of the circuit inside the leakage protector and facilitating the wiring of operators.

100201 (3) The rotating part and the power-taking part composed of elastic sheets are in contact with each other to achieve energizing, and the energizing contact and the disconnecting contact are located at two ends of the rotating part, respectively, so that when the handle rotates from the switch-on state to the switch-out state, the power-taking part can maintain a continuous contacting state with the rotating part. When the rotating part is rotated with the handle to a position where the first disconnecting contact at the other end is in contact with the power-taking part, the power-taking part and the first disconnecting contact are separated instead of being in contact. Then, the interval time from the disconnection between the moving contact and the static contact to the disconnection between the rotating part and the power-taking part is further extended by the rotation of the handle, thereby reducing the arc releasing when the disconnected contacts are separated from each other. On the basis of the above, in the present application, the connection structure between the rotating part and the power-taking part is further optimized, so that, when being energizing, the rotating part is connected to the power-taking part through the first energizing contact at one end, and when being in the disconnected state, the rotating part is separated from the power-taking part through the first disconnecting contact at the other end, that is, the power-taking position and the disconnected position are different from each other, thereby avoiding the energizing stability of the first energizing contact from being affected by a carbonization of the first disconnecting contact. Similarly, by using the protruding part to connect the rotating part when being energizing and using the inclined part to disconnect the rotating part when being powered off, it is possible to avoid the energizing stability of the protruding part from being affected by the carbonization of the inclined part. With the cooperation, even if the power-taking mechanism of the present application still generates the arc when being disconnected, the releasing arc does not affect the energizing stability of the rotating part and the power-taking part, further improving the operation stability of the present application; [0021] (4) On the basis of the power-taking mechanism, in the present application, the structure of the test button is further optimized. By connecting the button spring and the handle spring with each other, the button spring can take power from the handle spring, that is, the current can enter the circuit board after passing through the wiring board, the electromagnetic system, the power-taking part, the handle spring and the button spring in sequence. Compared to existing structures, wires between the button spring and the circuit board can be effectively omitted, further reducing the complexity of the circuit inside the leakage protector and facilitating wiring of operators; [0022] (5) Due to the power-taking mechanism, in the present application, it can ensure the normal disconnection of the circuit board in case that the circuit is reversed. On the basis of this structure, in the present application, the arrangement of various functional components and executing members inside the leakage protector are adjusted. The circuit board takes power from the L-pole electromagnetic system through the cooperation of the power-taking mechanism and the test button structure, so that the power-taking mechanism, the test button structure, the electromagnetic system and the circuit board can be an-anged from top to bottom on one side of the protector housing, which effectively shortens or eliminates a spacing distance and a wire length between various functional components, further reduces the difficulty in wiring and reduces an occupation space inside the leakage protector.

Therefore, the thickness of the bipolar leakage protector in the present application can be reduced to 18mrn from 36mm in case of the conventional leakage protector, greatly reducing the external dimensions of the leakage protector. Also, with the arrangement, an additional installation space for the N-pole arc extinguishing cover can be provided on a side of the protector housing close to the circuit board, so that the N-pole arc extinguishing cover can cooperate with the L-pole arc extinguishing cover on the other side of the protector housing to achieve a dual arc extinguishing effect, further improving the operation stability of the leakage protector; [0023] Therefore, the present application has advantages of good operation stability, convenient wiring, and good arc extinguishing effect.

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a schematic structural view of one side of the present application; [0025] FIG. 2 is a schematic structural view of the other side of the present application; [0026] FIG. 3 is a schematic structural view of a connection of a power-taking mechanism with a button spring and a contact spring; [0027] FIG. 4 is a schematic structural view of a rotating part and a power-taking part when being switched on; [0028] FIG. 5 is a schematic structural view of the rotating part and the power-taking part when releasing the arc; and [0029] FIG. 6 is a schematic structural view of the rotating part and the power-taking part when being switched out.

[0030] The numeral references in drawings: 1-protector housing 2-actuating mechanism, 3-handle, 4-L-pole electromagnetic system, 5-thennoelement assembly, 6-circuit board, 7-handle spring, 9-rotating part, 8-power-taking part, 10-first energizing contact, 11-first disconnecting contact, 13-second disconnecting contact, 15-button, 17-N-pole arc extinguishing cover, 19-partition plate, 21-N-pole leading-in terminal, 23-N-pole leading-out terminal, 25-N-pole static contact, 27-L-pole static contact, 29-second arc striking piece, 802-inclined part, 901-pressing part, 12-second energizing contact, 14-button spring 16-contact spring 18-L-pole arc extinguishing cover, 20-L-pole leading-in terminal, 22-L-pole leading-out terminal, 24-N-pole moving contact, 26-L-pole moving contact, 28-first arc striking piece, 801-elastic pressing piece, 803-protruding part, 14h testing part.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The further explanation of the present application in conjunction with the accompanying drawings and embodiments will be followed, which does not serve as a limitation to the present application.

[0032] Embodiments [0033] A double arc-extinguishing cover type leakage protector is provided and, as shown in FIGS. 1 to 6, includes a protector housing 1. An actuating mechanism 2 and a power-taking mechanism are provided in the protector housing 1. The power-taking mechanism is connected to a handle 3 at one side thereof, and is connected to an L-pole electromagnetic system 4 at the other side thereof A circuit board 6 is provided outside the L-pole electromagnetic system 4 and is connected to the protector housing 1. The power-taking mechanism includes a handle spring 7 located inside the handle 3. One end of the handle spring 7 is connected to the circuit board 6 and the other end of the handle spring 7 is provided with a power-taking part 8. The power-taking part 8 is connected to the protector housing 1, and one side of the power-taking part 8 is electrically connected to the L-pole electromagnetic system 4 through an elastic pressing piece 801 [0034] One end of the handle spring 7 extends to the outside of the handle 3 and is provided with a rotating part 9. A first energizing contact 10 and a first disconnecting contact 11 are provided on the rotating part 9. A second energizing contact 12 and a second disconnecting contact 13 are provided on the power-taking part 8, and are staggered with each other. When the leakage protector is connected, the second energizing contact 12 and the first energizing contact 10 are in contact with each other. When the leakage protector is disconnected, the second disconnecting contact 13 and the first disconnecting contact 11 are separated from each other [0035] The power-taking part 8 is a metal sheet, and is provided with an inclined part 802 that is inclined towards the rotating part 9. A protruding part 803 is provided at the end of the inclined part 802. The second energizing contact 12 is located on the protruding part 803. The second disconnecting contact 13 is located on the inclined part 802.

[0036] The rotating part 9 is arc-shaped, and the first energizing contact 10 and the first disconnecting contact 11 are arranged at two ends of the rotating part 9, respectively. A pressing part 901 is provided at an end of the rotating part 9 close to the first disconnecting contact 11, and the first disconnecting contact 11 is located on the pressing part 901.

[0037] A direction of rotating the handle 3 when the leakage protector is disconnected is defined as a direction A. The first energizing contact 10 is located at an end of the rotating part 9 close to the direction A. As shown in FIG. 4, the handle 3 is switched out in a counterclockwise direction, and the first energizing contact 10 is located at a counterclockwise end of the rotating part 9. The first disconnection contact II is located at an end of the rotating part 9 away from the direction A. [0038] A button spring 14 is electrically connected to an end of the handle spring 7 away from the power-taking part 8. The handle spring 7 and the button spring 14 may be welded to each other. One end of the button spring 14 is connected to the circuit board 6, and the other end of the button spring 14 is provided with a testing part 141. A button 15 and a contact spring 16 are provided on two sides of the testing part 141, respectively. The button 15 is slidably connected to the protector housing 1, and an end portion of the contact spring 16 is connected to the circuit board 6.

[0039] An N-pole arc extinguishing cover 17 is provided on the protector housing 1 at a side of the circuit board 6, and an L-pole arc extinguishing cover 18 is provided on a side of the protector housing 1 away from the circuit board 6. The circuit board 6 and the L-pole arc extinguishing cover 18 are separated from each other by a partition plate 19 located in the middle of the protector housing 1.

[0040] An L-pole leading-in terminal 20 and an N-pole leading-in terminal 21 are provided at an end of the protector housing 1, and an L-pole leading-out terminal 22 and an N-pole leading-out terminal 23 are provided at the other end of the protector housing 1. An N-pole moving contact 24 and an N-pole static contact 25 are provided at two sides of the N-pole arc extinguishing cover 17, respectively. The outer part of the N-pole moving contact 24 is connected to the N-pole leading-out terminal 23, and the outer part of the N-pole static contact 25 is connected to the N-pole leading-in terminal 21. An L-pole moving contact 26 and an L-pole static contact 27 are provided on an outer side of the L-pole arc extinguishing cover 18. The outer part of the L-pole moving contact 26 is connected to the L-pole leading-out terminal 22, and the outer part of the L-pole static contact 27 is connected to the L-pole leading-in terminal 20 via the L-pole electromagnetic system 4. Each of the handle 3, the L-pole electromagnetic system 4, and the actuating mechanism 2 extend to the left or right side of the partition plate 19.

[0041] One end of the L-pole moving contact 26 is connected to the L-pole leading-out terminal 22 via a thermoelement assembly 5, which may be a conventional thermal trip unit in a bimetallic-sheet structure. One side of the thermoelement assembly 5 is connected to a first arc striking piece 28, and an end of the first arc striking piece 28 extends to a side of the L-pole arc extinguishing cover 18. One side of the N-pole leading-out terminal 23 is connected to a second arc striking piece 29, and the end of the second arc striking piece 29 extends to one side of the N-pole arc extinguishing cover 17.

[0042] The L-pole arc extinguishing cover 18 is located below the L-pole electromagnetic system 4, and the N-pole arc extinguishing cover 17 is located below the actuating mechanism 2.

[0043] The operation principle of the present application is now described. During assembling, the power-taking part 8 is fitted in the protector housing 1 by an elastic pressing piece 801 at one end of the power-taking part 8, and then the L-pole electromagnetic system 4 is inserted into the protector housing 1 from a side of the power-taking part 8, so that the inserted electromagnetic system compresses and deforms the elastic pressing piece 801, achieving a tight contact and thus an electrical connection between the L-pole electromagnetic system 4 and the elastic pressing piece 801. After being welded to each other, the handle spring 7 and the button spring 14 are installed together with handle 3, so that the handle spring 7 and the button spring 14 are electrically connected in a switch-out state and a switch-on state of the leakage protector. In the present application, in case of energizing, the second energizing contact 12 of the power-taking part 8 is in contact with the first energizing contact 10 of the handle spring 7 in the switch-on state of the handle 3, so that the current enters the circuit board 6 by passing through a L-pole wiring board, the L-pole electromagnetic system 4, the power-taking part 8 and the handle spring 7 in sequence, achieving the power-taking effect. The power-taking part 8 is deformed under pressing of the rotating unit 9 in the switch-on state, thereby maintaining a stable contact between the second energizing contact 12 and the first energizing contact 10 by a return elastic force of the elastic sheet.

100441 When an electric leakage is detected in the circuit board 6, the trip unit is triggered to push and thus separate the moving contact from the static contact on both sides and release the arc. At this moment, the moving contact triggers the action of the actuating mechanism 2 after being pushed, causing the handle 3 to rotate from the switch-on state to the switch-out state. The handle 3 is rotated to drive the rotating part 9 to rotate in the direction A. The rotating part 9 and the power-taking part 8 are continuously kept in contact in the switch-out process by the return elastic force and the cooperation of the power-taking part 8 on and with the arc-shaped rotating part 9 during the rotation, until the pressing part 901 is rotated to the contact position where it becomes in contact with the inclined part 802. When the rotating part 9 is in this contact position, the further rotation of the rotating part 9 will cause separation of the rotating part 9 from the power-taking part 8, thereby releasing an arc at the first disconnecting contact 11 and the second disconnection contact 13. Since it takes some time for the linkage action of actuating mechanism 2 and the switch-out action of the handle 3, a time of arc releasing of the rotating part 9 and the power-taking part 8 is later than a time of the separation of the moving contact from the static contact, so that most of the arc has been released by the moving contact and the static contact before the power-taking structure is disconnected. That is, the amount of arc releasing at the time of the separation of the rotating part 9 from the power-taking part 8 is reduced, which alleviates the problem of the high-temperature carbonization at the contact-disconnected position. On the other hand, due to the misalignment of the disconnecting contacts with the respective energizing contacts in the power-taking structure, the carbonization of the disconnecting contacts of the rotating part 9 and the power-taking part 8 cannot affect the energizing performance of their energizing contacts. Therefore, the present application can significantly improve the operation stability and service life of the leakage protector by achieving a dual protection effect.

100451 When the button 15 is in use, the button 15 is pressed by the operator to deform the testing part 141 of the button spring 14 to be in contact with the contact spring 16, so as to trigger the circuit board 6 to simulate an electric leakage, thereby triggering the action of the trip unit and switching out the leakage protector. By supplying power to the button spring 14 from the handle spring, the connecting wires between the button spring 14 and the wiring board can be effectively eliminated, which is convenient for the operator to connect wires.

100461 On the basis of the above structure, in the present application, the N-pole arc extinguishing cover 17 and the circuit board can be arranged on the same side of the partition plate 19 at different positions by re-arranging and optimizing the structure of the elements inside the leakage protector. Meanwhile, the L-pole arc extinguishing cover 18 can be placed on the other side of the partition plate 19, thereby achieving compatibility between the dual arc extinguishing cover and the circuit board 6 and effectively avoiding a mutual contact between the arc and the circuit board 6. When the leakage protector switches out and generates the arc, the arc generated between the L-pole moving contact 26 and the L-pole static contact 27 can be dealt with by the L-pole arc extinguishing cover 18, and the arc generated between the N-pole moving contact 24 and the N-pole static contact 25 can be dealt with by the N-pole arc extinguishing cover 17, thereby effectively improving the arc extinguishing effect of the circuit breaker

Claims

CLAIMS1. A double arc-extinguishing cover type leakage protector, comprising a protector housing (1), wherein an actuating mechanism (2) and a power-taking mechanism are provided in the protector housing (1), the power-taking mechanism is connected at a side to a handle (3), and is connected at the other side to an L-pole electromagnetic system (4), a circuit board (6) is provided outside the L-pole electromagnetic system (4), the power-taking mechanism comprises a handle spring (7) located in the handle (3), the handle spring (7) has one end connected to the circuit board (6) and the other end provided with a power-taking part (8), the power-taking part (8) is fitted in the protector housing (1), and is electrically connected to the L-pole electromagnetic system (4) through an elastic pressing piece (801) at a side of the power-taking part.
2. The double arc-extinguishing cover type leakage protector according to claim 1, wherein the handle spring (7) has an end extending to outside of the handle (3) and is provided with a rotating part (9), a first energizing contact (10) and a first disconnecting contact (11) are provided on the rotating part (9), and a second energizing contact (12) and a second disconnecting contact (13) are provided on the power-taking part (8) at different positions, so that the second energizing contact (12) and the first energizing contact (10) are in contact with each other when the leakage protector is connected, and the second disconnecting contact (13) and the first disconnecting contact (11) are separated from each other when the leakage protector is disconnected.
3. The double arc-extinguishing cover type leakage protector according to claim 2, wherein the power-taking part (8) is provided with an inclined part (802) inclined towards the 13 rotating part (9), a protruding part (803) is provided at an end of the inclined part (802), the second energizing contact (12) is located on the protruding part (803), and the second disconnecting contact (13) is located on the inclined part (802).
4. The double arc-extinguishing cover type leakage protector according to claim 2, wherein the rotating part (9) is arc-shaped the first energizing contact (10) and the first disconnecting contact (11) are arranged at two ends of the rotating part (9), respectively, to the rotating part (9) is provided with a pressing part (901) at an end of the rotating part close to the first disconnecting contact (11), and the first disconnecting contact (11) is located on the pressing part (901).
5. The double arc-extinguishing cover type leakage protector according to claim 4, wherein, a direction of rotating the handle (3) when the leakage protector is disconnected is defined as a direction A, the first energizing contact (10) is located at an end of the rotating part (9) close to the direction A, and the first disconnection contact (11) is located at an end of the rotating part (9) away from the direction A.
6. The double arc-extinguishing cover type leakage protector according to claim 1, wherein a button spring (14) is electrically connected to an end of the handle spring (7) away from the power-taking part (8), the button spring (14) has an end connected to the circuit board (6), and the other end provided with a testing part (141), a button (15) and the contact spring (16) are respectively provided on two sides of the testing part (141), and the contact spring (16) has an end portion connected to the circuit board (6).
7 The double arc-extinguishing cover type leakage protector according to claim 1, wherein an N-pole arc extinguishing cover (17) is provided on the protector housing (1) at a side of the circuit board (6), an L-pole arc extinguishing cover (18) is provided on a side of the protector housing (1) away from the circuit board (6), and the circuit board (6) and the L-pole arc extinguishing cover (18) are separated from each other by a partition plate (19).
8. The double arc-extinguishing cover type leakage protector according to claim 7, wherein an L-pole leading-in terminal (20) and an L-pole leading-out terminal (22) as well as an N-pole leading-in terminal (21) and an N-pole leading-out terminal (23) are provided at two ends of the protector housing (1), respectively, an N-pole moving contact (24) and an N-pole static contact (25) are provided at two sides of the N-pole arc extinguishing cover (17) respectively, the N-pole leading-out terminal (23) is connected to an outer part of the N-pole moving contact (24), and the N-pole leading-in terminal (21) is connected to an outer part of the N-pole static contact (25), an L-pole moving contact (26) and an L-pole static contact (27) are provided at an outer side of the L-pole arc extinguishing cover (18), the L-pole leading-out terminal (22) is connected to an outer part of the L-pole moving contact (26), and the L-pole leading-in terminal (20) is connected to an outer part of the L-pole static contact (27) through the L-pole electromagnetic system (4).
9. The double arc-extinguishing cover type leakage protector according to claim 8, wherein an end of the L-pole moving contact (26) is connected to the L-pole leading-out terminal (22) via a thermoelement assembly (5), a side of the thermoelement assembly (5) is connected to a first arc striking piece (28), and an end of the first arc striking piece (28) extends to a side of the L-pole arc extinguishing cover (18), a side of the N-pole leading-out terminal (23) is connected to a second arc striking piece (29), and an end of the second arc striking piece (29) extends to a side of the N-pole arc extinguishing cover (17).
10. The double arc-extinguishing cover type leakage protector according to claim 7, wherein the L-pole arc extinguishing cover (18) is located below the L-pole electromagnetic system (4), and the N-pole arc extinguishing cover (17) is located below the actuating mechanism (2).