Power taking device and residual-current circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a power taking device and a residual-current circuit breaker. The electricity taking device comprises a first static contact bridge, a second static contact bridge, a contact bridge, a movable contact bridge and a pressing assembly, the contact bridge is electrically connected with a controller of the residual-current circuit breaker, the first static contact bridge and the second static contact bridge are electrically connected with two wiring ends of the residual-current circuit breaker respectively, and the contact bridge is located between the first static contact bridge and the second static contact bridge; the movable contact bridge is supported by the contact bridge, the pressing assembly is operated to drive the movable contact bridge to rotate around the supporting position on the contact bridge according to two different electricity taking modes of an upper incoming line or a lower incoming line of the residual-current circuit breaker, one end of the movable contact bridge is made to make contact with the first static contact bridge, and the first static contact bridge, the movable contact bridge and the contact bridge are electrically connected to form a first conductive loop. Or the other end of the movable contact bridge is in contact with the second static contact bridge, and the second static contact bridge, the movable contact bridge and the contact bridge are electrically connected to form a second conductive loop, so that the residual-current circuit breaker can normally operate in different wire inlet modes.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field especially relates to a kind of power taking device and leakage circuit breaker. BACKGROUND

[0002] Leakage circuit breaker is the switch that can automatically act when leakage current in circuit exceeds predetermined value, can interrupt circuit when detecting circuit fault, to protect personnel safety.

[0003] In prior art, leakage circuit breaker is all designed to take power by upper incoming line mode (i.e., using specific first terminal as incoming terminal to access power supply, and second terminal as outgoing terminal), and leakage circuit breaker collects power supply voltage from incoming terminal. With diversification of market demand, leakage circuit breaker needs to use lower incoming line mode (i.e., using second terminal as incoming terminal to access power supply), and leakage circuit breaker cannot collect power supply voltage when using lower incoming line mode, which cannot meet the use demand under lower incoming line mode.

[0004] Therefore, it is urgent to provide a kind of power taking device and leakage circuit breaker to take power flexibly under different incoming line modes of leakage circuit breaker. SUMMARY

[0005] The utility model aims at providing a kind of power taking device and leakage circuit breaker to take power flexibly under different incoming line modes of leakage circuit breaker.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a kind of power taking device, for being arranged on leakage circuit breaker, the power taking device includes first static contact bridge, second static contact bridge, contact bridge, moving contact bridge and press-down assembly, the contact bridge is used to be electrically connected with the controller of the leakage circuit breaker, the first static contact bridge and the second static contact bridge are used to be electrically connected with the two terminals of the leakage circuit breaker respectively, the contact bridge is located between the first static contact bridge and the second static contact bridge;

[0008] The middle part of the moving contact bridge is rotatably arranged on the contact bridge, and the press-down assembly is used to be operated to drive the moving contact bridge to rotate, so that one end of the moving contact bridge is in contact with the first static contact bridge, and the first static contact bridge, the moving contact bridge and the contact bridge are electrically connected and form a first conductive loop, or the other end of the moving contact bridge is in contact with the second static contact bridge, and the second static contact bridge, the moving contact bridge and the contact bridge are electrically connected and form a second conductive loop.

[0009] As an optional technical scheme of the power taking device, the power taking device further comprises a shell, the pressing assembly comprises a dial lever and a lever, the dial lever is rotationally connected with the shell, the dial lever has a first position and a second position relative to the shell, one end of the lever is connected with the dial lever, and the lever slides relative to the dial lever along an axial direction of the lever, a middle part of the movable contact bridge is bent and in a V shape, and the other end of the lever abuts against the middle part of the movable contact bridge.

[0010] The dial lever rotates to the first position to rotate the lever, the lever abuts against the movable contact bridge to rotate the movable contact bridge, and one end of the movable contact bridge is in contact with the first fixed contact bridge.

[0011] The dial lever rotates to the second position to rotate the lever, the lever abuts against the movable contact bridge to rotate the movable contact bridge, and the other end of the movable contact bridge is in contact with the second fixed contact bridge.

[0012] As an optional technical scheme of the power taking device, the dial lever further has a third position relative to the shell, the dial lever rotates to the third position to rotate the lever, the lever abuts against the movable contact bridge, the middle part of the movable contact bridge is located on the contact bridge, and the movable contact bridge is separated from the first fixed contact bridge and the second fixed contact bridge.

[0013] As an optional technical scheme of the power taking device, the middle part of the movable contact bridge is in an arc-shaped bent shape, and the end of the lever abutting against the movable contact bridge is in an arc shape or a circular shape and is arranged to slide relative to the movable contact bridge.

[0014] As an optional technical scheme of the power taking device, the pressing assembly further comprises an elastic member, two ends of the elastic member are connected with the dial lever and the lever respectively, and the elastic member is configured to abut the lever against the movable contact bridge.

[0015] As an optional technical scheme of the power taking device, the shell is provided with an opening and two mounting holes, cylindrical protrusions are protruded on two sides of the dial lever respectively, the cylindrical protrusions are clamped and rotationally arranged in the mounting holes, and the dial lever is partially arranged outside the shell through the opening.

[0016] As an optional technical scheme of the power taking device, the lever comprises:

[0017] a connecting part, one end of which is connected with the dial lever;

[0018] a contact part, which abuts against the movable contact bridge;

[0019] a supporting part, one side of which is connected with the other end of the connecting part, the other side of which is connected with the contact part, and which is movably inserted into the shell.

[0020] As an optional technical scheme of the power taking device, the shell is internally provided with a mounting plate, the mounting plate is provided with a mounting groove, the supporting part is concavely provided with a ring groove, and the supporting part is movably inserted into the mounting groove.

[0021] As an optional technical scheme of the power taking device, the contact bridge is provided with a supporting surface and a limiting part protruding from the supporting surface, two limiting parts are arranged at intervals, and the movable contact bridge is arranged on the supporting surface and located between the two limiting parts.

[0022] The utility model provides a leakage circuit breaker, including main part, controller and above -mentioned power taking device, power taking device and controller all set up on main part, controller with contact bridge electricity is connected, first static contact bridge with second static contact bridge respectively with two wiring ends on main part electricity is connected.

[0023] Beneficial effects:

[0024] The utility model provides a kind of power taking device, for being set on leakage circuit breaker, this power taking device includes first static contact bridge, second static contact bridge, contact bridge, movable contact bridge and press-down component, contact bridge is used to be electrically connected with the controller of leakage circuit breaker, first static contact bridge and second static contact bridge are used to be electrically connected with the two wiring ends of leakage circuit breaker respectively, and contact bridge is between first static contact bridge and second static contact bridge;The middle part of movable contact bridge is rotatably arranged on contact bridge, press-down component is used to be operated to drive movable contact bridge to rotate around the support position on contact bridge, so that one end of movable contact bridge is in contact with first static contact bridge, and first static contact bridge, movable contact bridge and contact bridge are electrically connected and form first conduction loop, or the other end of movable contact bridge is in contact with second static contact bridge, and second static contact bridge, movable contact bridge and contact bridge are electrically connected and form second conduction loop.By being provided with contact bridge, first static contact bridge and second static contact bridge, contact bridge is between first static contact bridge and second static contact bridge, contact bridge is electrically connected with the controller of leakage circuit breaker to be used as loop common point, the middle part of movable contact bridge is rotatably arranged on contact bridge, movable contact bridge is supported using contact bridge, for the two different power taking modes of line-in or line-out on leakage circuit breaker, under the premise that the installation mode of leakage circuit breaker is not changed, press-down component is operated to drive movable contact bridge to rotate around the support position on contact bridge, so that movable contact bridge can be in contact with first static contact bridge or second static contact bridge, to form different power taking loop, ensure that leakage circuit breaker can normally operate under different line-in mode.

[0025] The utility model provides a leakage circuit breaker, including main body, controller and power taking device, power taking device sets up on the main body, controller and contact bridge electricity is connected, first static contact bridge and second static contact bridge are respectively on two terminal blocks of main body electricity connection. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structural schematic diagram of leakage circuit breaker provided by the utility model embodiment;

[0027] Figure 2 It is the structural schematic diagram of power taking device provided by the utility model embodiment;

[0028] Figure 3 It is the partial structural schematic diagram of power taking device provided by the utility model embodiment;

[0029] Figure 4 It is the sectional view of power taking device provided by the utility model embodiment;

[0030] Figure 5 It is the structural schematic diagram of contact bridge provided by the utility model embodiment;

[0031] Figure 6 It is the structural schematic diagram of push subassembly provided by the utility model embodiment;

[0032] Figure 7 It is the structural schematic diagram of base provided by the utility model embodiment;

[0033] Figure 8 It is the structural schematic diagram of cover plate provided by the utility model embodiment.

[0034] In the drawing:

[0035] 100, main body; 101, base; 102, cover; 103, terminal block;

[0036] 11, circuit board; 121, first static contact bridge; 122, second static contact bridge; 13, contact bridge; 131, support surface; 132, limiting portion; 14, moving contact bridge; 15, lever; 151, connecting portion; 152, support portion; 1521, annular groove; 153, abutting portion; 16, elastic member; 17, push rod; 171, cylindrical protrusion;

[0037] 20, shell; 21, base; 211, mounting plate; 212, mounting groove; 22, cover plate; 221, mounting hole. DETAILED DESCRIPTION

[0038] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely intended to explain the utility model and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0039] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] In the utility model, unless explicitly defined and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0041] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0042] As Figures 1 to 5 As shown in the figure, the utility model provides a kind of electricity taking device and residual current circuit breaker, and the residual current circuit breaker includes main body 100, controller and electricity taking device, and electricity taking device and controller are arranged on main body 100, controller is electrically connected with contact bridge 13, first static contact bridge 121 and second static contact bridge 122 are electrically connected with two terminal blocks 103 on main body 100 respectively.

[0043] The power taking device is arranged on the residual current circuit breaker and specifically comprises a first static contact bridge 121, a second static contact bridge 122, a contact bridge 13, a movable contact bridge 14 and a pressing assembly. The contact bridge 13 is arranged to be electrically connected with a controller of the residual current circuit breaker. The first static contact bridge 121 and the second static contact bridge 122 are arranged to be electrically connected with two wire terminals 103 of the residual current circuit breaker respectively. The contact bridge 13 is arranged between the first static contact bridge 121 and the second static contact bridge 122. The movable contact bridge 14 is arranged to be rotatable at the middle part thereof on the contact bridge 13. The pressing assembly is arranged to be operated to drive the movable contact bridge 14 to rotate around a supporting position on the contact bridge 13, so that one end of the movable contact bridge 14 is in contact with the first static contact bridge 121, and the first static contact bridge 121, the movable contact bridge 14 and the contact bridge 13 are electrically connected and form a first conductive loop, or the other end of the movable contact bridge 14 is in contact with the second static contact bridge 122, and the second static contact bridge 122, the movable contact bridge 14 and the contact bridge 13 are electrically connected and form a second conductive loop.

[0044] By arranging the contact bridge 13, the first static contact bridge 121 and the second static contact bridge 122, the contact bridge 13 is arranged between the first static contact bridge 121 and the second static contact bridge 122. The contact bridge 13 is electrically connected with the controller of the residual current circuit breaker to serve as a loop common point. The movable contact bridge 14 is arranged to be rotatable at the middle part thereof on the contact bridge 13. The contact bridge 13 supports the movable contact bridge 14. For two different power taking modes of incoming line or outgoing line of the residual current circuit breaker, the pressing assembly is operated to drive the movable contact bridge 14 to rotate, so that the movable contact bridge 14 can be in contact with the first static contact bridge 121 or the second static contact bridge 122, thereby forming different power taking loops, and ensuring that the residual current circuit breaker can operate normally under different incoming line modes.

[0045] The two wire terminals 103 are arranged to be respectively an incoming line terminal and an outgoing line terminal. The first static contact bridge 121 and the second static contact bridge 122 are arranged to be electrically connected with the two wire terminals 103 respectively. The contact bridge 13 is arranged to be a common terminal and electrically connected with the controller. It can be understood that when the power line is electrically connected with the first static contact bridge 121 through one wire terminal 103, the pressing assembly is operated to drive the movable contact bridge 14 to rotate, and then the movable contact bridge 14 is in contact with the first static contact bridge 121. At this time, the first static contact bridge 121, the movable contact bridge 14 and the contact bridge 13 form a first conductive loop to provide a stable working voltage for the controller of the residual current circuit breaker. When the power line is connected with the second static contact bridge 122 through the other wire terminal 103, the pressing assembly is only needed to be operated to make the movable contact bridge 14 in contact with the second static contact bridge 122. At this time, the second static contact bridge 122, the movable contact bridge 14 and the contact bridge 13 form a second conductive loop to provide a stable working voltage for the controller of the residual current circuit breaker. The position of the movable contact bridge 14 of the power taking device is switched by operation to meet the use requirement of the residual current circuit breaker under different incoming line modes.

[0046] Specifically, the main body 100 comprises a base 101 and a cover 102, the base 101 and the cover 102 are detachably connected, the controller is arranged inside the main body 100, the power taking device is arranged on the cover 102, the cover 102 is provided with a notch at the top, the power taking device is partially inserted into the notch, and the lever 17 is exposed from the notch.

[0047] Optionally, the power taking device further comprises a circuit board 11 and a shell 20, the shell 20 is fixed on the circuit board 11, the contact bridge 13, the first static contact bridge 121 and the second static contact bridge 122 are all located in the shell 20, the contact bridge 13, the first static contact bridge 121 and the second static contact bridge 122 are all electrically connected with the circuit board 11, the contact bridge 13 is electrically connected with the controller through the circuit board 11, and the first static contact bridge 121 and the second static contact bridge 122 are respectively electrically connected with the two wire terminals 103 on the main body 100 through the circuit board 11. In the embodiment, the base 101 and the cover 102 can be connected by screws, the circuit board 11 is fixed on the cover 102 by screws, and the contact bridge 13, the first static contact bridge 121 and the second static contact bridge 122 are all soldered on the circuit board 11. By arranging the circuit board 11, the circuit board 11 can provide a stable electrical connection and signal transmission path, and ensure that the residual current circuit breaker can operate safely and stably. In other embodiments, the first static contact bridge 121 and the second static contact bridge 122 can be directly electrically connected with the two wire terminals 103 respectively, and the contact bridge 13 can be electrically connected with the controller through the circuit board 11. It can be understood that, in some cases without complex signal processing, the contact bridge 13 can be directly connected with the controller or other existing electrical connection modes can be adopted, and in the case of complex control logic and high reliability requirements, the circuit board 11 can better realize signal processing and protection functions.

[0048] Further, the pressing assembly comprises the lever 17 and the lever 15, the lever 17 is rotationally connected with the shell 20, the lever 17 has a first position and a second position relative to the shell 20, one end of the lever 15 is connected with the lever 17, and the lever 15 slides relative to the lever 17 along the axial direction of the lever 15, the middle part of the movable contact bridge 14 is bent and in a V shape, and the other end of the lever 15 abuts against the middle part of the movable contact bridge 14; the lever 17 is rotated to the first position to rotate the lever 15, the lever 15 abuts against the movable contact bridge 14 to rotate, so that one end of the movable contact bridge 14 is in contact with the first static contact bridge 121; the lever 17 is rotated to the second position to rotate the lever 15, the lever 15 abuts against the movable contact bridge 14, so that the other end of the movable contact bridge 14 is in contact with the second static contact bridge 122.

[0049] By setting the dial lever 17 and the lever 15, the dial lever 17 has a first position and a second position, one end of the lever 15 is connected with the dial lever 17 and can slide axially along the lever 15 relative to the dial lever 17, and the other end of the lever 15 abuts against the middle part of the movable contact bridge 14; since the middle part of the movable contact bridge 14 is bent and in V shape, when the dial lever 17 is operated to rotate, the lever 15 is driven to rotate, the lever 15 abuts against the movable contact bridge 14 to make the movable contact bridge 14 rotate to switch positions, so as to contact with the first static contact bridge 121 or the second static contact bridge 122; by using the dial lever 17 to drive the lever 15 to rotate, the rotation angle of the lever 15 is controlled, the operation is convenient, a larger operation range can be realized in a limited space, the difficulty of switching operation and the required operation force are reduced, and the flexibility and adaptability are good.

[0050] Further, the dial lever 17 also has a third position relative to the shell 20, the dial lever 17 is rotated to the third position to make the lever 15 rotate, the lever 15 abuts against the movable contact bridge 14 to make the middle part of the movable contact bridge 14 located on the contact bridge 13, and the movable contact bridge 14 is kept separated from the first static contact bridge 121 and the second static contact bridge 122. When the dial lever 17 is in the third position, the middle part of the movable contact bridge 14 is located on the contact bridge 13, so that the movable contact bridge 14 is kept separated from the first static contact bridge 121 and the second static contact bridge 122, that is, the movable contact bridge 14 is disconnected with the incoming line end of the residual current circuit breaker, so as to protect the controller of the residual current circuit breaker in the high-voltage impulse withstand test process, avoid the damage of the controller due to high-voltage impulse, reduce the equipment maintenance and replacement cost, and improve the production efficiency; at the same time, the power supply line does not need to be removed in advance before the high-voltage impulse withstand test, the operation process is simplified, and the risk of damage to the equipment due to improper operation is reduced; after the high-voltage impulse withstand test is completed, the power taking device can be accurately adjusted to the corresponding working position according to the actual incoming line mode of the residual current circuit breaker, so as to restore the normal power taking function of the residual current circuit breaker.

[0051] Optionally, the middle part of the movable contact bridge 14 is in arc-shaped bent shape, and the end of the lever 15 abutting against the movable contact bridge 14 is in arc-shaped or circular shape and is arranged to slide relative to the movable contact bridge 14. By setting the middle part of the movable contact bridge 14 in arc-shaped bent shape and setting the end of the lever 15 abutting against the movable contact bridge 14 in arc-shaped or circular shape, the lever 15 can slide relative to the movable contact bridge 14, so as to make the movable contact bridge 14 smoothly switch positions.

[0052] Referring to Figure 5The contact bridge 13 is provided with a supporting surface 131 and a limiting portion 132 protruding from the supporting surface 131, and two limiting portions 132 are arranged at intervals, and the movable contact bridge 14 is arranged on the supporting surface 131 and between the two limiting portions 132. By arranging two limiting portions 132 on the contact bridge 13, the position of the movable contact bridge 14 can be limited from both sides, so as to avoid the position deviation of the movable contact bridge 14 during the rotation. In the embodiment, the contact bridge 13 is Y-shaped, and the two limiting portions 132 are symmetrically arranged along the central axis of the contact bridge 13.

[0053] Optionally, the shell 20 is provided with an opening and two mounting holes 221 (refer to Figure 8 ), and the two sides of the lever 17 are respectively provided with a cylindrical protrusion 171, which is clamped and rotatably arranged in the mounting hole 221, and the lever 17 is partially arranged outside the shell 20. By arranging the opening and the mounting hole 221 on the shell 20, and clamping and rotatably arranging the cylindrical protrusion 171 in the mounting hole 221, the lever 17 is convenient to disassemble and assemble; and the lever 17 is partially arranged outside the shell 20, which is convenient to operate the lever 17.

[0054] Optionally, the pressing assembly further comprises an elastic member 16, two ends of the elastic member 16 are respectively connected with the lever 17 and the lever 15, and the elastic member 16 is configured to press the lever 15 against the movable contact bridge 14. By arranging the elastic member 16, the elastic member 16 presses the lever 15 against the movable contact bridge 14, which provides a certain buffer space for operation, reduces the impact force on the movable contact bridge 14, and can also prolong the service life of the power taking device. The elastic member 16 can be a spring. In the embodiment, the lever 17 is provided with a guide hole, and the elastic member 16 and the lever 15 are slidably arranged in the guide hole.

[0055] Referring to Figure 3 and Figure 4 , in the embodiment, the contact bridge 13, the first static contact bridge 121 and the second static contact bridge 122 are arranged side by side at intervals, the first static contact bridge 121 is located on the left side of the contact bridge 13, and the second static contact bridge 122 is located on the right side of the contact bridge 13; if the right side of the lever 17 is pressed in the X direction, the lever 15 is arranged on the movable contact bridge 14 and at the left edge of the movable contact bridge 14, thereby driving the movable contact bridge 14 to rotate in the Y direction, so that the left side of the movable contact bridge 14 is in contact with the first static contact bridge 121, and at this time the power taking device obtains the power supply voltage from the leakage circuit breaker inlet end through the first static contact bridge 121; conversely, the same is true.

[0056] Referring to Figures 6 to 8The lever 15 comprises a connecting portion 151, an abutting portion 153 and a supporting portion 152. One end of the connecting portion 151 is connected with the push lever 17. The abutting portion 153 abuts against the movable contact bridge 14. One side of the supporting portion 152 is connected with the other end of the connecting portion 151. The other side of the supporting portion 152 is connected with the abutting portion 153. The supporting portion 152 is movably inserted into the shell 20. By arranging the lever 15 to comprise the connecting portion 151, the abutting portion 153 and the supporting portion 152, the supporting portion 152 is movably inserted into the shell 20. The connecting portion 151 and the abutting portion 153 are arranged on two sides of the supporting portion 152. The connecting portion 151 is connected with the push lever 17. The abutting portion 153 abuts against the movable contact bridge 14. When the push lever 17 rotates, the movable contact bridge 14 can be driven to rotate by the lever 15, so as to realize power transmission. In the embodiment, the connecting portion 151 is slidably connected with the push lever 17 by the elastic member 16. The lever 15 is of an integral structure.

[0057] In the embodiment, the shell 20 comprises a base 21 and a cover plate 22. The cover plate 22 is detachably connected with the base 21. The contact bridge 13, the first static contact bridge 121 and the second static contact bridge 122 are at least partially arranged in the base 21. An opening and a mounting hole 221 are arranged on the cover plate 22. The push lever 17 passes through the opening of the cover plate 22 and is partially arranged outside the cover plate 22. By arranging the detachable cover plate 22 and the base 21, dust and impurities are prevented from entering. The safety of the power taking device is improved. The base 21 and the cover plate 22 can be connected by screws or clamping. The push lever 17 is partially exposed from the opening of the cover plate 22, so as to facilitate operation.

[0058] Optionally, the shell 20 is provided with a mounting plate 211. The mounting plate 211 is provided with a mounting groove 212. The supporting portion 152 is provided with a ring groove 1521. The supporting portion 152 is movably inserted into the mounting groove 212. The mounting plate 211 is located between the two side groove walls of the ring groove 1521. By arranging the ring groove 1521 on the supporting portion 152 and movably inserting the supporting portion 152 into the mounting groove 212, the mounting plate 211 is located between the two side groove walls of the ring groove 1521. The position of the supporting portion 152 is limited from two sides. The rotating direction of the lever 15 is limited.

[0059] In the embodiment, two mounting plates 211 are arranged side by side in the base 21. The two mounting plates 211 divide the base 21 into three mounting spaces. Each mounting plate 211 is provided with a mounting groove 212 on the top. Each mounting space is provided with one contact bridge 13, one first static contact bridge 121, one second static contact bridge 122 and one movable contact bridge 14 corresponding to three phases. The elastic force provided by the elastic member 16 is greater than the sum of the contact reaction forces of the three-phase levers 15 and the movable contact bridges 14. When the push lever 17 rotates, the three-phase movable contact bridges 14 are driven to switch positions.

[0060] Specifically, the lever 15 comprises a connecting portion 151, a supporting portion 152 and three abutting portions 153, the supporting portion 152 is connected with the connecting portion 151 on one side, and the three abutting portions 153 are arranged at intervals on the other side of the supporting portion 152; two ring grooves 1521 are arranged at intervals on the supporting portion 152 for cooperation with the two installation grooves 212, the bottom end of each abutting portion 153 is used for abutting a corresponding movable contact bridge 14, and the bottom end of each abutting portion 153 is arranged in an arc shape or a circular shape. In the embodiment, the bottom end of the abutting portion 153 is provided with a circular arc surface or a spherical surface.

[0061] The power taking device provided in the embodiment can rotate to switch positions to ensure that the residual current circuit breaker can normally operate under different incoming line modes without changing the installation mode of the residual current circuit breaker; when high-voltage impulse withstand voltage test is performed, the power supply line does not need to be removed, the middle part of the movable contact bridge 14 is located on the contact bridge 13, and the movable contact bridge 14 is separated from the first static contact bridge 121 and the second static contact bridge 122; after the high-voltage impulse withstand voltage test is completed, the power taking device can be accurately adjusted to the corresponding working position according to the actual incoming line mode of the residual current circuit breaker, so that the normal power taking function of the residual current circuit breaker is restored.

[0062] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not to be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A power take-off device for being arranged on an earth leakage circuit breaker, characterized in that The power taking device comprises a first static contact bridge (121), a second static contact bridge (122), a contact bridge (13), a moving contact bridge (14) and a pressing assembly, the contact bridge (13) is used for electrically connecting with a controller of the residual current circuit breaker, the first static contact bridge (121) and the second static contact bridge (122) are used for electrically connecting with two terminals (103) of the residual current circuit breaker respectively, and the contact bridge (13) is located between the first static contact bridge (121) and the second static contact bridge (122); The middle part of the moving contact bridge (14) is rotatably arranged on the contact bridge (13), the pressing assembly is used for being operated to drive the moving contact bridge (14) to rotate, so that one end of the moving contact bridge (14) is in contact with the first static contact bridge (121), and the first static contact bridge (121), the moving contact bridge (14) and the contact bridge (13) are electrically connected and form a first conductive loop, or the other end of the moving contact bridge (14) is in contact with the second static contact bridge (122), and the second static contact bridge (122), the moving contact bridge (14) and the contact bridge (13) are electrically connected and form a second conductive loop.

2. The power taking device according to claim 1, characterized in that The power taking device further comprises a shell (20), the pressing assembly comprises a dial lever (17) and a lever (15), the dial lever (17) is rotatably connected with the shell (20), the dial lever (17) has a first position and a second position relative to the shell (20), one end of the lever (15) is connected with the dial lever (17), and the lever (15) slides relative to the dial lever (17) along the axial direction of the lever (15), the middle part of the moving contact bridge (14) is bent and in a V shape, and the other end of the lever (15) abuts against the middle part of the moving contact bridge (14); The dial lever (17) is rotated to the first position to drive the lever (15) to rotate, the lever (15) abuts against the moving contact bridge (14) to drive the moving contact bridge (14) to rotate, and one end of the moving contact bridge (14) is in contact with the first static contact bridge (121); The dial lever (17) is rotated to the second position to drive the lever (15) to rotate, the lever (15) abuts against the moving contact bridge (14) to drive the moving contact bridge (14) to rotate, and the other end of the moving contact bridge (14) is in contact with the second static contact bridge (122).

3. The power taking device according to claim 2, characterized in that The dial lever (17) further has a third position relative to the shell (20), the dial lever (17) is rotated to the third position to drive the lever (15) to rotate, the lever (15) abuts against the moving contact bridge (14), so that the middle part of the moving contact bridge (14) is located on the contact bridge (13), and the moving contact bridge (14) is kept separated from the first static contact bridge (121) and the second static contact bridge (122).

4. The power taking apparatus according to claim 2, wherein The middle part of the moving contact bridge (14) is in an arc-shaped bent shape, and the end of the lever (15) abutting against the moving contact bridge (14) is in an arc shape or a circular shape and is slidably arranged relative to the moving contact bridge (14).

5. The power taking apparatus according to claim 2, wherein The pressing assembly further comprises an elastic member (16), two ends of the elastic member (16) are connected with the push rod (17) and the lever (15) respectively, and the elastic member (16) is configured to press the lever (15) against the movable contact bridge (14).

6. The power taking apparatus according to claim 2, wherein The shell (20) is provided with an opening and two mounting holes (221), the push rod (17) is provided with a cylindrical protrusion (171) on each side, the cylindrical protrusion (171) is clamped and rotatably arranged in the mounting hole (221), and the push rod (17) is partially arranged outside the shell (20) through the opening.

7. The power taking apparatus according to claim 2, wherein The lever (15) comprises: a connecting portion (151) connected with the push rod (17) at one end; a contact portion (153) pressing against the movable contact bridge (14); a supporting portion (152) connected with the other end of the connecting portion (151) at one side and connected with the contact portion (153) at the other side, and movably inserted into the shell (20).

8. The power taking apparatus according to claim 7, wherein The shell (20) is provided with a mounting plate (211), the mounting plate (211) is provided with a mounting groove (212), the supporting portion (152) is recessed with a ring groove (1521), the supporting portion (152) is movably inserted into the mounting groove (212), and the mounting plate (211) is located between the two side groove walls of the ring groove (1521).

9. The power take-off device of claim 1, wherein, The contact bridge (13) is provided with a supporting surface (131) and a limiting portion (132) protruding from the supporting surface (131), two limiting portions (132) are arranged at intervals, and the movable contact bridge (14) is arranged on the supporting surface (131) and located between the two limiting portions (132).

10. An electrical leakage circuit breaker, characterized by The power taking device and the controller are arranged on the main body (100), the controller is electrically connected with the contact bridge (13), and the first stationary contact bridge (121) and the second stationary contact bridge (122) are respectively electrically connected with two wire terminals (103) on the main body (100).

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