CN111554547B - Leakage test structure of leakage circuit breaker and leakage circuit breaker - Google Patents

Abstract

The invention provides an electric leakage test structure of an electric leakage breaker and the electric leakage breaker with the structure, wherein the electric leakage test structure of the electric leakage breaker comprises a first torsion spring, a conductive elastic piece and a test button, a moving contact assembly of the electric leakage breaker is hinged in a shell of the electric leakage breaker through a hinge shaft, the first torsion spring is sleeved on the hinge shaft, a first support arm of the first torsion spring is connected with a moving contact assembly of the breaker, a second support arm of the first torsion spring extends outwards and is limited by positioning to keep a fixed position, the conductive elastic piece and the test button are both arranged in the shell of the breaker, the conductive elastic piece extends to be abutted against the second support arm on the test button, the pressing of the test button can drive the elastic support arm of the conductive elastic piece to move to be contacted with the second support arm of the first torsion spring, and the elastic support arm of the conductive elastic piece can reset to be separated from the second support arm of the first torsion spring under the self elastic recovery effect when the pressing force of the test button is lost, so that the electric leakage breaker is simple in structure and easy to assemble.

Description

Leakage test structure of leakage circuit breaker and leakage circuit breaker

Technical Field

The invention relates to the field of circuit breakers, in particular to an electric leakage test structure of an electric leakage circuit breaker and the electric leakage circuit breaker with the structure.

Background

The leakage circuit breaker is widely used in the fields of industry, business, residential houses and the like, and can rapidly cut off a fault power supply in a specified extremely short time when the electric leakage occurs in a circuit, so that the safety of personnel and electric equipment is protected.

In the prior art, a test button and a test loop are generally arranged on the leakage circuit breaker, and the effectiveness of manually manufacturing a leakage loop for test tripping is carried out. However, in the prior art, the electric leakage test structure of the electric leakage circuit breaker has the defects of more parts, more complicated layout and higher assembly difficulty.

Disclosure of Invention

Therefore, the invention provides an electric leakage test structure of an electric leakage breaker and the electric leakage breaker with the structure, so as to solve the problems.

In order to achieve the above purpose, the technical scheme provided by the invention is as follows:

The utility model provides an electric leakage test structure of electric leakage circuit breaker, includes first torsional spring, electrically conductive elastic component and test button, and the electric leakage circuit breaker is equipped with the moving contact subassembly that carries out the divide-shut brake, moving contact subassembly articulates in the casing of electric leakage circuit breaker through a articulated shaft, first torsional spring cup joints in the articulated shaft, its first support arm electricity is connected the moving contact subassembly of circuit breaker, its second support arm outwards extends and is fixed position by location restriction and keep, electrically conductive elastic component and test button all set up in the casing of circuit breaker, electrically conductive elastic component extends has the elasticity support arm of contradicting on test button, test button's pressing can drive the elasticity support arm of electrically conductive elastic component move to the second support arm contact with first torsional spring, and the elasticity support arm of electrically conductive elastic component can reset to break away from under the second support arm of first torsional spring under self elasticity recovering action when losing test button's pressing force.

Further, the shell of the circuit breaker is also provided with a limiting lug, the limiting lug is positioned between the first support arm and the second support arm of the first torsion spring, and in the state of opening the circuit breaker, the first support arm and the second support arm of the first torsion spring are propped against the limiting lug to realize fixation; when the circuit breaker is switched on, the action of the moving contact assembly of the circuit breaker drives the first support arm of the first torsion spring to move away from the limiting lug, and the second support arm of the first torsion spring is limited by the positioning of the limiting lug to keep a fixed position.

Further, the second support arm of the first torsion spring is provided with a bending section.

Further, the conductive elastic piece is a second torsion spring, a first fixed convex column and a second fixed convex column positioned between the first fixed convex column and the test button are arranged in the shell of the circuit breaker, the first torsion spring is sleeved on the second fixed convex column, a first support arm of the first torsion spring is abutted on the first fixed convex column, a second support arm of the second torsion spring is abutted on the test button, and the second support arm is an elastic support arm.

Further, the second support arm of the second torsion spring is provided with a bending section.

The utility model provides an electric leakage circuit breaker, includes control module, L utmost point circuit breaker and N utmost point circuit breaker all include the casing and set up static contact assembly, moving contact assembly and the trip gear with moving contact assembly complex in the casing, control module sets up with the moving contact assembly linkage of L utmost point circuit breaker and N utmost point circuit breaker respectively to carry out the divide/close action, be equipped with the electric leakage test structure of electric leakage circuit breaker above-mentioned on the N utmost point circuit breaker, electrically conductive elastic component connects L looks power, and the moving contact assembly of N utmost point circuit breaker is connected with a soft connection to first torsional spring, and in moving contact assembly and the L utmost point circuit breaker of N utmost point circuit breaker all was connected with a soft connection, two soft connections all passed a zero sequence current transformer, zero sequence current transformer connects a leakage circuit board, the trip gear of L utmost point circuit breaker and N utmost point circuit breaker is connected respectively to the leakage circuit board.

Further, the leakage circuit board is arranged in the shell of the N-pole circuit breaker, the power input end of the leakage circuit board is respectively connected with an L-phase power supply and an N-phase power supply, and the conductive elastic piece is connected with the L-phase power supply input end of the leakage circuit board.

Furthermore, the shell of the N-pole circuit breaker and the shell of the L-pole circuit breaker are provided with mutually communicated mounting openings, and the zero sequence current transformer is mounted on the mounting openings.

Furthermore, the control module is an intelligent control module, and the zero sequence current transformer is also connected with the control module.

Furthermore, the zero sequence current transformer is composed of two groups of zero sequence current transformer units which are overlapped, wherein one zero sequence current transformer unit is connected with the leakage circuit board, and the other zero sequence current transformer unit is connected with the control module.

The technical scheme provided by the invention has the following beneficial effects:

the leakage test structure of the leakage circuit breaker provided by the scheme has the advantages of fewer parts and simple and convenient assembly; simultaneously, the first torsional spring is connected with the moving contact assembly, so that the first torsional spring can carry out opening energy storage when the moving contact assembly moves in a closing mode, and meanwhile the moving contact assembly has the function of opening driving.

Drawings

Fig. 1 is a schematic view of an electrical leakage test structure of an electrical leakage breaker according to an embodiment;

FIG. 2 is an exploded view showing the assembly of a first torsion spring in the residual current circuit breaker according to the embodiment;

FIG. 3 is a schematic diagram showing a connection structure between the first torsion spring and the movable contact assembly in the first embodiment;

Fig. 4 is a schematic diagram II of a connection structure between the first torsion spring and the moving contact assembly in the embodiment;

FIG. 5 is a schematic view showing an appearance of a leakage breaker according to an embodiment;

fig. 6 is a schematic diagram showing an internal structure of an L-pole circuit breaker of the earth leakage breaker according to the embodiment;

Fig. 7 is a schematic diagram showing an internal structure of an N-pole circuit breaker of the leakage breaker according to the embodiment;

Fig. 8 is a schematic diagram showing connection of a fixed contact assembly and a movable contact assembly of an N-pole circuit breaker in a closing state in the embodiment;

FIG. 9 is a schematic diagram of a static contact assembly of an N-pole circuit breaker according to an embodiment;

fig. 10 is a schematic diagram of a connection structure between a moving contact assembly and a zero sequence current transformer in the embodiment;

FIG. 11 is a schematic diagram showing an internal structure of an intelligent control module of the leakage breaker according to the embodiment;

FIG. 12 is an exploded view of an N pole circuit breaker according to an embodiment;

FIG. 13 is an exploded view of the L pole circuit breaker in an embodiment;

Fig. 14 is an exploded view of the intelligent control module according to the embodiment.

Detailed Description

For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The invention will now be further described with reference to the drawings and detailed description.

The leakage test structure of the leakage breaker provided in this embodiment, referring to fig. 1 to 4, includes a first torsion spring 38, a conductive elastic member 37 and a test button 36, the leakage breaker is provided with a moving contact assembly 33 for opening and closing, the moving contact assembly 33 is hinged in a housing 31 of the leakage breaker through a hinge shaft 313, specifically, the hinge shaft 313 is integrally formed by the housing 31 of the leakage breaker, a moving contact support 334 is fixed on the moving contact assembly 33, and the moving contact support 334 is hinged on the hinge shaft 313, so that the moving contact support 334 is hinged. Of course, in other embodiments, the constituent structure of the movable contact assembly 33 and the hinge connection structure are not limited thereto.

The first torsion spring 38 is sleeved on the hinge shaft 313, the first arm 381 of the first torsion spring 38 is electrically connected with the moving contact assembly 33 of the circuit breaker to realize electrical connection, specifically, a limit concave portion 335 is formed on the moving contact assembly 33, and the first arm 381 of the first torsion spring 38 is lapped in the limit concave portion 335 of the moving contact assembly 33 through torsion force to further realize electrical connection with the moving contact assembly 33; simple structure and easy assembly and disassembly. Of course, in other embodiments, the connection structure of the first arm 381 of the first torsion spring 38 electrically connected to the moving contact assembly 33 of the circuit breaker is not limited thereto.

The second arm 382 of the first torsion spring 38 extends outwardly and is restrained from position to maintain a fixed position without changing position in response to movement of the contact assembly 33. The conductive elastic member 37 and the test button 36 are both disposed on the casing 31 of the circuit breaker, the conductive elastic member 37 extends to form an elastic arm 372 abutting against the test button 36, pressing of the test button 36 can drive the elastic arm 372 of the conductive elastic member 37 to move to contact with the second arm 382 of the first torsion spring 38, and the elastic arm 372 of the conductive elastic member 37 can return to the second arm 382 separated from the first torsion spring 38 under the self elastic restoring effect when the pressing force of the test button 36 is lost.

The embodiment specifically implements and applies the leakage test structure of the leakage breaker, and provides a leakage breaker, which is shown with continued reference to fig. 5 to 14, and includes a control module 10, an L-pole breaker 20 and an N-pole breaker 30, wherein the N-pole breaker 30 is provided with the leakage test structure of the leakage breaker, that is, the leakage test structure of the leakage breaker is applied to the N-pole breaker 30, and the structures in fig. 1 to 4 are schematic diagrams of the internal structure of the N-pole breaker 30.

The L-pole circuit breaker 20 and the N-pole circuit breaker 30 each include a housing, and a fixed contact assembly, a moving contact assembly and a tripping device that are disposed in the housing and are matched with the moving contact assembly, the housing, the fixed contact assembly, the moving contact assembly and the tripping device that define the L-pole circuit breaker 20 are respectively an L-pole housing 21, an L-pole fixed contact assembly, an L-pole moving contact assembly 23 and an L-pole tripping device, and the housing, the fixed contact assembly, the moving contact assembly and the tripping device that define the N-pole circuit breaker 30 are respectively an N-pole housing 31, an N-pole fixed contact assembly, an N-pole moving contact assembly 33 and an N-pole tripping device. The control module 10 is respectively connected with the N-pole moving contact assemblies 33 of the L-pole circuit breaker 20 and the N-pole circuit breaker 30 in a linkage manner so as to perform opening/closing actions.

Specifically, the conductive elastic member 37 is connected to the L-phase power supply, the first torsion spring 38 is connected to the N-pole moving contact assembly 33 of the N-pole circuit breaker 30, the N-pole moving contact assembly 33 of the N-pole circuit breaker 30 and the L-pole moving contact assembly 23 of the L-pole circuit breaker 20 are connected to a flexible connection, which is the flexible connection 34 connected to the N-pole moving contact assembly 33 and the flexible connection 24 connected to the L-pole moving contact assembly 23, respectively, the two flexible connections 34 and 24 pass through a zero sequence current transformer 40, the zero sequence current transformer 40 is connected to a leakage circuit board 50, and the leakage circuit board 50 is connected to the tripping devices of the L-pole circuit breaker 20 and the N-pole circuit breaker 30, respectively.

During closing operation, the control module 10 controls the L-pole moving contact assembly 23 and the N-pole moving contact assembly 33 to act, wherein the N-pole moving contact assembly 33 swings along the hinge shaft 313 to connect the N-pole fixed contact assembly, so as to realize a normal path; the swinging of the N-pole moving contact assembly 33 drives the first arm 381 of the first torsion spring 38 to move, and the second arm 382 of the first torsion spring 381 is positioned, limited and kept at a fixed position, so that the first torsion spring 38 is deformed to a corresponding extent. When the leakage test is needed, the test button 36 is pressed, and the test button 36 drives the elastic support arm 372 of the conductive elastic member 37 to move to contact with the second support arm 382 of the first torsion spring 38, so as to form a leakage circuit; the zero sequence current transformer 40 is output to the leakage circuit board 50 after induction, and the leakage circuit board 50 controls the tripping devices of the L-pole circuit breaker 20 and the N-pole circuit breaker 30 to carry out tripping operation, so as to generate a breaking action.

Meanwhile, the first torsion spring 38 is also used as a brake-separating energy storage member, when the N-pole movable contact assembly 33 is in brake-closing action, torsion of the first torsion spring 38 is overcome to swing, and then the first torsion spring 38 generates larger elastic deformation, and when the brake is released, the first torsion spring 38 recovers deformation and synchronously drives the N-pole movable contact assembly 33 to swing back to brake separation. The test loop has simple structure, few devices and easy assembly.

Further, in the present embodiment, the housing of the circuit breaker (in this embodiment, the N-pole housing 31 is specifically provided with a limit bump 314, the limit bump 314 is located between the first arm 381 and the second arm 382 of the first torsion spring 38, and in the open state of the circuit breaker, the first arm 381 and the second arm 382 of the first torsion spring 38 are abutted against the limit bump 314 by torsion to achieve fixation; when the circuit breaker is switched on, the motion of the moving contact assembly (i.e., the N-pole moving contact assembly 33) of the circuit breaker drives the first arm 381 of the first torsion spring 38 to move away from the limiting bump 314, such as moving clockwise in fig. 1, the first torsion spring 38 is elastically deformed, and the second arm 382 of the first torsion spring 38 is limited by the positioning of the limiting bump 314 to maintain a fixed position. The structural design is simple and easy to realize. Of course, in other embodiments, the positioning limiting structure of the second arm 382 of the first torsion spring 38 is not limited thereto.

Further, since the second arm 382 of the first torsion spring 38 has a linear structure, the contact surface is not large, so that the elastic arm 372 of the conductive elastic member 37 needs to better ensure that the elastic arm 372 can make good contact with the linear structure, in this embodiment, the second arm 382 of the first torsion spring 38 has a bending section, and the bending section can increase the contact area of the second arm 382 so as to make good contact with the elastic arm 372 of the conductive elastic member 37.

Further, in this embodiment, the conductive elastic member 37 is a second torsion spring, a first fixing protrusion 312 and a second fixing protrusion 311 disposed between the first fixing protrusion 312 and the test button 36 are disposed in a housing (in this embodiment, the N-pole housing 31) of the circuit breaker, the second torsion spring is sleeved on the second fixing protrusion 311, a first support arm 371 is abutted against the first fixing protrusion 312, a second support arm 372 is abutted against the test button 36, and the second support arm 372 is an elastic support arm 372. The conductive elastic member 37 is of a torsion spring structure, is easy to assemble, and has a simple structure. Of course, in other embodiments, other elastic devices, such as spring plates, etc., may be used.

Similarly, in this embodiment, since the second arm 372 of the second torsion spring 37 has a linear structure, the contact surface thereof is not large, so that the second arm 382 of the first torsion spring 38 needs to better ensure that the second arm 372 of the second torsion spring 37 can make good contact with the second arm 372 of the first torsion spring, and in this embodiment, the second arm 372 of the second torsion spring 37 has a bending section, which can increase the contact area of the second arm 372 so as to make good contact with the second arm 382 of the first torsion spring 38.

Further, in this embodiment, the leakage circuit board 50 is disposed in the N-pole housing 31 of the N-pole circuit breaker 30, the power input end of the leakage circuit board 50 is connected to the L-phase power supply and the N-phase power supply, respectively, and the conductive elastic member 37 is connected to the L-phase power supply input end 501 on the leakage circuit board 50. Specifically, the first arm 371 of the second torsion spring 37 is connected to a wire 39, and is connected to the L-phase power input terminal 501 of the leakage circuit board 50 through the wire 39, so as to simplify the circuit structure. Of course, in other embodiments, the conductive elastic member 37 may be connected to the L-pole fixed contact assembly of the L-pole circuit breaker 20, may be connected to the L-pole movable contact assembly 23 of the L-pole circuit breaker 20, or may be connected to the incoming or outgoing line end of the L-pole circuit breaker 20, so long as it can be connected to an L-phase power source.

In particular, the leakage circuit board 50 is disposed on the N-pole housing 31, so as to simplify the number of parts in the N-pole housing 31, in this embodiment, the stationary contact assembly is provided with a stationary contact portion, a stationary contact portion on the L-pole stationary contact assembly is defined as an L-pole stationary contact portion 221, and a stationary contact portion on the N-pole stationary contact assembly is an N-pole stationary contact portion 321. The movable contact assembly is provided with a movable contact portion matched with the fixed contact portion and a wiring terminal connected with a flexible connection (in this embodiment, a conductive wire), the movable contact portion and the wiring terminal of the L-pole movable contact assembly 23 are defined as an L-pole movable contact portion 231 and an L-pole wiring terminal 232, and the movable contact portion and the wiring terminal of the N-pole movable contact assembly 33 are defined as an N-pole movable contact portion 331 and an N-pole wiring terminal 332.

Referring to fig. 7 and 8, the N-pole stationary contact portion 321 extends upward, and the N-pole movable contact portion 331 is located below the N-pole terminal 332. Referring to fig. 6, the L-pole stationary contact part 221 extends downward, and the L-pole movable contact part 231 is located at a position below the L-pole terminal 232.

The L pole static contact assembly and the N pole static contact assembly are respectively connected with the wire inlet ends of the L pole circuit breaker 20 and the N pole circuit breaker 30, the flexible connection 24 of the movable contact assembly (namely the L pole movable contact assembly 23) connected with the L pole circuit breaker 20 and the flexible connection 34 of the movable contact assembly (namely the N pole movable contact assembly 33) connected with the N pole circuit breaker 30 respectively penetrate through a zero sequence current transformer 40, and then the wire outlet ends of the L pole circuit breaker 20 and the N pole circuit breaker 30 are respectively connected.

When the switch is turned on, the extending direction of the fixed contact part (i.e., the L-pole fixed contact part 221) in the L-pole circuit breaker 20 is opposite to the direction from the movable contact part (L-pole movable contact part 231) to the terminal (L-pole terminal 232) of the movable contact assembly, and the L-phase current flows through the L-pole fixed contact assembly to the L-pole movable contact assembly 23 and then flows out through the flexible connection 24 connected to the L-pole movable contact assembly 23. When the current flows through the L-pole fixed contact part 221 of the L-pole fixed contact assembly, the current flows downwards, and after flowing from the L-pole fixed contact part 221 to the L-pole movable contact assembly 23, the current flows upwards from the L-pole movable contact part 231 to the L-pole terminal 232; reverse current is formed, and thus repulsive force is generated.

The extending direction of the stationary contact portion (i.e., the N-pole stationary contact portion 321) in the N-pole circuit breaker 30 is the same as the direction from the movable contact portion (the N-pole movable contact portion 331) of the movable contact assembly to the terminal (the N-pole terminal 332), and the N-phase current flows through the N-pole stationary contact assembly to the N-pole movable contact assembly 33, and then flows out through the flexible connection 34 connected to the N-pole movable contact assembly 33. When the current flows through the N-pole static contact portion 321 of the N-pole static contact assembly, the current flows upwards, and after flowing from the N-pole static contact portion 321 to the N-pole moving contact assembly 33, the current flows upwards from the N-pole moving contact portion 331 to the N-pole terminal 332; and the current in the same direction is formed, so that attraction acting force is generated.

When the switch-off is performed, the repulsive force generated by the current between the L-pole fixed contact assembly and the L-pole movable contact assembly 23 can realize quick response for switch-off; the attraction force generated by the current between the N-pole static contact assembly and the N-pole moving contact assembly 33 has a certain delay, so that the current is mainly disconnected from the L-pole circuit breaker 20, and the electric arc generated by opening the gate in the N-pole circuit breaker 30 is very small, therefore, the arc extinguishing chamber structure of the N-pole circuit breaker 30 can be completely omitted, other devices can be more reasonably distributed in the vacated part, the device arrangement structure in the N-pole circuit breaker 30 is simplified, and the whole circuit breaker volume can be smaller. While the L-pole circuit breaker 20 is normally provided with an arc chute, such as the arc chute 26 in fig. 6, to arc-interrupt the L-pole circuit breaker 20.

Specifically, in this embodiment, the extending direction of the L-pole static contact portion 221 in the L-pole circuit breaker 20 is opposite to the direction from the L-pole moving contact portion 231 of the L-pole moving contact assembly 23 to the L-pole terminal 232, so that a mutual-exclusive acting force is generated during power-on, and the force is faster during switching-off, so that the delay effect of the N-pole circuit breaker 30 is more obvious, the arc generated by the N-pole circuit breaker 30 is smaller, and the devices in the N-pole housing 31 of the N-pole circuit breaker 30 are safer, which is an optimal structure. Of course, in other embodiments, the extending direction of the L-pole static contact portion 321 in the L-pole circuit breaker 30 and the direction from the L-pole moving contact portion 331 of the L-pole moving contact assembly 33 to the L-pole terminal 332 need not be opposite, so long as the directions are different, so that the opening of the N-pole circuit breaker 30 has a certain delay.

Of course, in other embodiments, the extending direction of the L-pole stationary contact 221 in the L-pole circuit breaker 20 and the direction from the L-pole movable contact 231 of the L-pole movable contact assembly 23 to the L-pole terminal 232 may not be limited, and the arc extinguishing chamber may be disposed in the N-pole housing 31 according to the conventional structure, so that the safety of the devices in the N-pole housing 31 may be ensured, and the size of the circuit breaker may be larger.

Specifically, the N pole housing 31 of the N pole circuit breaker 30 and the L pole housing 21 of the L pole circuit breaker 20 are provided with through mounting openings (i.e., the mounting opening 315 of the N pole housing 31 and the mounting opening 211 of the L pole housing 21), and the zero sequence current transformer 40 is mounted on the mounting openings, so that the inner ring of the zero sequence current transformer 40 can be located in the N pole housing 31 and the L pole housing 21 at the same time, and the flexible connection 24 and 34 of the L pole and the N pole are convenient to be connected in a penetrating manner. More specifically, the installation opening is located between the moving contact assembly and the outlet end, for example, in the N-pole circuit breaker 30, the zero sequence current transformer 40 installed on the installation opening is located between the N-pole moving contact assembly 33 and the N-pole outlet end, and in the L-pole circuit breaker 20, the zero sequence current transformer 40 is located between the L-pole moving contact assembly 23 and the L-pole outlet end; meanwhile, the direction of the axial line of the zero sequence current transformer 40 is the same as the direction of the connecting line of the incoming line end and the outgoing line end, so that the soft connection can be completed in a penetrating connection mode with the shortest length, and the structural arrangement is optimized. Of course, in other embodiments, the arrangement structure of the zero sequence current transformer 40 is not limited thereto, and may be entirely directly placed in the N-pole housing 31, or the like.

Specifically, in this embodiment, the control module 10 is the intelligent control module, the control module 10 includes a housing, a control circuit board 12 and an opening and closing driving device that are disposed in the housing, the housing that defines the intelligent control module is a control housing 11, the housing of the intelligent control module (i.e. the control housing 11), the housing of the L-pole circuit breaker 20 (i.e. the L-pole housing 21) and the housing of the N-pole circuit breaker 30 (i.e. the N-pole housing 31) are disposed side by side, and the device further includes a driving shaft (not shown), where the driving shaft penetrates through the three housings, the opening and closing driving device is in driving connection with the driving shaft, and the driving shaft is respectively disposed in linkage with the moving contact assemblies of the L-pole circuit breaker 20 and the N-pole circuit breaker 30, where the control circuit board 12 is connected with the opening and closing driving device to control the opening and closing driving device. In this embodiment, the opening and closing driving device includes a driving motor 13 and a gear transmission assembly 14, where the control circuit board 12 is connected to the driving motor 13 to control the driving motor 13 to rotate, and the rotation of the driving motor 13 drives the driving shaft to rotate through the gear transmission assembly 14 to further control opening and closing.

The leakage circuit board 50 is arranged in the N-electrode shell 31, the leakage circuit board 50 belongs to a strong-current circuit board, namely, the L-phase and N-phase power supplies are directly connected to drive, and the leakage circuit board can be isolated from the control module 10 driven by weak current (such as 12V), so that the influence on the control module 10 is avoided, and the operation of the circuit breaker is more stable.

Further, the fixed contact assemblies of the L-pole circuit breaker 20 and the N-pole circuit breaker 30 each have a conductive plate, such as the conductive plate 22 of the L-pole fixed contact assembly and the conductive plate 32 of the N-pole fixed contact assembly, for example, the N-pole fixed contact assembly of fig. 8 and 9, the N-pole fixed contact portion 321 is formed on the conductive plate 32, a manganese copper sheet 322 is connected in series on the conductive plate 32, and two ends of the manganese copper sheet 322 are respectively formed with a pin 323, and the two ends of the manganese copper sheet 322 are connected with the control module 10 through the pins 323, specifically, the control circuit board 12 is connected with the control module 10, and the control circuit board 12 collects electrical signals (such as voltage, current, etc.) of the L-phase and the N-phase through the manganese copper sheet, so as to measure the electrical signals such as to output the electrical signals outwards. Of course, in other embodiments, the conductive plate structure of the stationary contact assembly is not limited thereto.

Further, the zero sequence current transformer 40 is further connected to the control module 10, specifically, the control circuit board 12 connected to the control module 10, and the control circuit board 12 collects the output signal of the zero sequence current transformer 40 to determine whether the leakage occurs, so as to output the leakage outwards.

Specifically, the connection relationship between the integrated circuit mechanism of the control circuit board 12 and external devices (such as the zero sequence current transformer 40, the driving motor 13, etc.) is the prior art, and will not be described in detail herein.

Still further, in this embodiment, the zero sequence current transformer 40 is composed of two sets of zero sequence current transformer units that are overlapped, one of the zero sequence current transformer units is connected to the leakage circuit board 50, the other zero sequence current transformer unit is connected to the control module 10, and signal outputs of the two sets of zero sequence current transformer units do not interfere with each other. Of course, in other embodiments, the zero sequence current transformer 40 may be implemented directly by using a zero sequence current transformer unit, and two sets of output terminals are connected in parallel to connect the leakage circuit board 50 and the control module 10 respectively, however, two sets of output terminals connected in parallel may have mutual interference, which is not the most preferred.

Specifically, in the present embodiment, the leakage circuit board 50 and the control circuit board 12 are conventional technologies, and specific integrated circuits and the like thereof are well known and used by those skilled in the art, and will not be described in detail herein.

Specifically, the trip device specifically includes a trip coil and a trip component (such as the trip coil 25 in the L-pole circuit breaker 20 in fig. 6 and the trip coil 35 in the N-pole circuit breaker 30 in fig. 7, the trip component is not shown) that is in linkage with the moving contact component, the trip coil corresponds to the trip component, the leakage circuit board 50 connects the trip coils 25 and 35 to trigger the actions of the trip coils 25 and 35, and the actions of the trip coils 25 and 35 trigger the actions of the trip component, so as to realize the opening action of the moving contact component. The specific structure and specific mounting structure of the trip coil and trip assembly in the trip device are prior art and will not be described in detail herein.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. An electric leakage test structure of electric leakage circuit breaker, its characterized in that: including first torsional spring, electrically conductive elastic component and test button, the electric leakage circuit breaker is equipped with the moving contact subassembly that carries out the divide-shut brake, the moving contact subassembly articulates in the casing of electric leakage circuit breaker through a articulated shaft, first torsional spring cup joints in the articulated shaft, its first support arm electricity is connected the moving contact subassembly of circuit breaker, its second support arm outwards extends and is fixed position by the location restriction and keep fixed position, electrically conductive elastic component and test button all set up in the casing of circuit breaker, electrically conductive elastic component extends there is the elasticity support arm of contradicting on the test button, the pressing of test button can drive the elasticity support arm of electrically conductive elastic component move to the second support arm contact with first torsional spring, and the elasticity support arm of electrically conductive elastic component can reset to break away from under the self elasticity restoring effect the second support arm of first torsional spring when losing the pressing force of test button.

2. The leakage test structure of a leakage breaker according to claim 1, wherein: the shell of the circuit breaker is also provided with a limit lug, the limit lug is positioned between the first support arm and the second support arm of the first torsion spring, and in the state of opening the circuit breaker, the first support arm and the second support arm of the first torsion spring are propped against the limit lug to realize fixation; when the circuit breaker is switched on, the action of the moving contact assembly of the circuit breaker drives the first support arm of the first torsion spring to move away from the limiting lug, and the second support arm of the first torsion spring is limited by the positioning of the limiting lug to keep a fixed position.

3. The leakage test structure of a leakage breaker according to claim 1, wherein: the conductive elastic piece is a second torsion spring, a first fixed convex column and a second fixed convex column positioned between the first fixed convex column and the test button are arranged in the shell of the circuit breaker, the first torsion spring is sleeved on the second fixed convex column, a first support arm of the first torsion spring is abutted on the first fixed convex column, a second support arm of the first torsion spring is abutted on the test button, and the second support arm is an elastic support arm.

4. The leakage test structure of a leakage breaker according to claim 3, wherein: the second support arm of the first torsion spring and the second support arm of the second torsion spring are provided with bending sections.

5. The leakage test structure of a leakage breaker according to claim 1, wherein: the movable contact assembly is provided with a limiting concave part, and the first support arm of the first torsion spring is lapped in the limiting concave part of the movable contact assembly through torsion, so that the first support arm is electrically connected with the movable contact assembly.

6. An earth leakage breaker, comprising: the control module, the L pole circuit breaker and the N pole circuit breaker all include the casing and set up static contact subassembly, moving contact subassembly and with moving contact subassembly complex trip gear in the casing, control module sets up with the moving contact subassembly linkage of L pole circuit breaker and N pole circuit breaker respectively to carry out divide/closing action, its characterized in that: the leakage test structure of the leakage circuit breaker according to any one of claims 1 to 5 is arranged on the N-pole circuit breaker, the conductive elastic piece is connected with an L-phase power supply, the first torsion spring is connected with a moving contact component of the N-pole circuit breaker, the moving contact component of the N-pole circuit breaker and the moving contact component of the L-pole circuit breaker are connected with a soft connection, the two soft connections all penetrate through a zero sequence current transformer, the zero sequence current transformer is connected with a leakage circuit board, and the leakage circuit board is respectively connected with tripping devices of the L-pole circuit breaker and the N-pole circuit breaker.

7. The earth leakage breaker according to claim 6, characterized in that: the leakage circuit board is arranged in the shell of the N-pole circuit breaker, the power input end of the leakage circuit board is respectively connected with an L-phase power supply and an N-phase power supply, and the conductive elastic piece is connected with the L-phase power supply input end of the leakage circuit board.

8. The earth leakage breaker according to claim 6, characterized in that: the shell of the N-pole circuit breaker and the shell of the L-pole circuit breaker are provided with mutually communicated mounting openings, and the zero sequence current transformer is mounted on the mounting openings.

9. The earth leakage breaker according to claim 6, characterized in that: the control module is an intelligent control module, and the zero sequence current transformer is also connected with the control module.

10. The earth leakage breaker according to claim 9, characterized in that: the zero sequence current transformer consists of two groups of zero sequence current transformer units which are overlapped, wherein one zero sequence current transformer unit is connected with the leakage circuit board, and the other zero sequence current transformer unit is connected with the control module.