A circuit breaker with leakage release

Abstract

The present application relates to a circuit breaker with a leakage release, which includes a plurality of circuit breaker bodies, a housing for mounting the circuit breaker bodies, a release, a controller, a zero-sequence transformer, a plurality of output poles and a plurality of input poles. The release and the controller are fixed on the housing, the input pole is arranged at the lower end of the housing, a connecting plate is arranged on the input pole, and the connecting plate is connected to the input pole and passes through the zero-sequence transformer, and then contacts the circuit breaker body. The output pole is arranged at the upper end of the housing. The circuit breaker body includes a traction rod and a contact rod, the contact rod is movably connected to the output pole, the traction rod is connected to the contact rod and can drive the contact rod to rotate. A circuit breaker with a leakage release of the present application utilizes the imbalance of three-wire and four-wire to generate residual current in the zero-sequence transformer and controls the release push rod to move through the controller to open the circuit breaker, effectively solving the problem of circuit breaker leakage and having a simple structure.

Description

Technical Field

[0001] The invention relates to the field of circuit protection, in particular to a circuit breaker with a leakage release. Background Art

[0002] A circuit breaker is a switching device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Due to the imbalance of the three-phase four-wire circuit, leakage will occur, which will eventually cause the problem of burning the circuit breaker. When the circuit breaker leaks, shorts or the current exceeds the set threshold of the zero-sequence current transformer, the circuit breaker is set to automatically cut off the power to protect the circuit breaker. The principle is that when there is leakage in the line or a person is electrocuted, the vector sum of the current passing through the zero-sequence current transformer is not equal to zero, and a voltage is generated on both sides of the secondary coil of the transformer, which is amplified by the integrated circuit. When the set threshold is reached, the power supply is cut off through the leakage release, thereby playing a role in electric shock and leakage protection.

[0003] The existing trip devices generally use a mechanical zero-sequence transformer to cooperate with electromagnetic induction and the elastic potential energy of the spring to open the circuit breaker. Since only simple mechanical parts are used, the induction sensitivity is poor, the opening speed is slow, and the circuit breaker is opened only after leakage damage. In addition, when multiple contacts are required to work together, the zero-sequence transformer is prone to errors and false alarms, which indirectly causes unnecessary economic losses.

[0004] Therefore, there is an urgent need for a circuit breaker with a residual current release that is sensitive, quick to open, and not prone to false alarms. The Chinese patent publication number is: CN206441676U. The name of the invention is: Circuit breaker with residual current release. A circuit breaker with a residual current release is disclosed, including a residual current release and a circuit breaker spliced ​​together. One end of the circuit breaker is provided with a first wire entry hole for wiring, and a first screw window for fixing the wire is provided above the first wire entry hole; one end of the residual current release is provided with a second wire entry hole for wiring, and a second screw window for fixing the wire is provided above the second wire entry hole; one end of the wire is connected to the circuit breaker through the first wire entry hole, and the other end is connected to the residual current release through the second wire entry hole. Its shortcomings are: the invention can accommodate a limited number of contact rods, and the sensitivity of the residual current is not adjusted. It belongs to a more traditional mechanical structure circuit breaker.

[0005] The present invention provides a circuit breaker with a leakage release, which uses the imbalance of three-wire and four-wire to make the zero-sequence transformer generate residual current and controls the release push rod to move through the controller to open the circuit breaker, effectively solving the problem of circuit breaker leakage and has a simple structure and is easy to use. The input electrodes of multiple contact rods are passed through the zero-sequence transformer at the same time, and the zero-sequence transformer is electrically connected to the controller, thereby improving the accuracy and sensitivity of leakage detection. At the same time, a traction mechanism and a synchronous shaft are provided, which can quickly disconnect the contact rods of all circuit breakers at the same time, with a fast response speed and a significant leakage protection effect. Summary of the invention

[0006] The object of the present invention is to provide a circuit breaker with a leakage release to solve the problems raised in the above background technology.

[0007] The present invention provides the following technical solution: a circuit breaker with a leakage release, comprising a plurality of circuit breaker bodies, a shell portion for mounting the circuit breaker bodies, a release, a controller, a zero-sequence transformer, a plurality of output pole pieces and a plurality of input pole pieces. The release and the controller are fixed on the shell portion as a whole and are located directly above one of the circuit breaker bodies. The input pole piece is arranged at the lower end of the shell portion and is arranged in parallel with the circuit breaker in a one-to-one correspondence, and a connecting plate is arranged on the input pole piece, the input pole piece is connected to the connecting plate and passes through the zero-sequence transformer, and then the connecting plate contacts the corresponding circuit breaker body respectively. The output pole piece is arranged at the upper end of the shell portion in a one-to-one correspondence with the circuit breaker body. The circuit breaker body comprises a traction rod and a contact rod, the contact rod is movably connected to the output pole piece, the traction rod is connected to the contact rod and can drive the contact rod to rotate. The release comprises a bracket, a coil, a reset block, a reset rod and a push rod. The bracket is fixed on the outer shell, the coil is fixed in the bracket, and an elastic member is arranged between the push rod and the bracket. When the coil is energized, the push rod moves downward under the action of electromagnetic force, and the elastic member is compressed. When the coil stops being energized, the push rod is reset under the action of the elastic member. The reset rod is arranged on the other side of the bracket and is movably connected with the reset block. One end of the reset block protrudes and contacts the push rod. The coil and the zero-sequence transformer are electrically connected to the controller. Due to the imbalance of the three-phase four-wire circuit, there will be a problem of leakage burning the circuit breaker body. When the circuit breaker body has leakage, short circuit or the current exceeds the set threshold of the zero-sequence transformer, the zero-sequence transformer generates residual current and transmits it to the controller. The controller sends an instruction to control the coil to be energized. The coil generates electromagnetic force to push the push rod downward, and the push rod pushes the traction rod to rotate. The traction rod drives the contact rod to rotate and separate from the output pole piece to complete the opening. Thereby, the effect of automatic opening and circuit protection is achieved when leakage, short circuit or current exceeds the set threshold of the zero-sequence transformer is achieved.

[0008] Furthermore, the release also includes a handle. A spring C is arranged between the handle and the push rod, and the handle can be used to manually open the gate and adjust the position of the push rod relative to the traction rod. The spring C is located directly above the coil and is perpendicular to the coil. The push rod extends from both sides of the coil to the traction rod. The center of the bracket is hollowed out to form a groove for accommodating the coil, and a cylinder is arranged for the coil to be wound. The coil and the controller are electrically connected. The upper end of the bracket is flat and exposes a through hole for the handle to move up and down. The two sides of the lower end are respectively fixedly connected to the outer shell by buckles, and a cavity is reserved at the center of the lower end for the push rod and the traction rod to move mutually. When the controller receives the residual current generated by the zero-sequence transformer, it sends a command to energize the coil, thereby generating an electromagnetic force to attract the push rod to move downward. The push rod then pushes the traction rod to separate the contact rod from the output pole piece to achieve the opening effect.

[0009] Furthermore, the circuit breaker with the leakage release device also includes a traction mechanism and a traction linkage rod, and each circuit breaker body is equipped with a traction mechanism. The traction mechanism includes a traction plate, a traction spring B, a traction housing and a rotating rod, and the traction linkage rod is fixed on the bracket. The lower end of the traction housing is fixedly connected to the outer shell, and the upper end is fixedly connected to the bracket. The rotating rod is fixed in the traction housing. The traction spring B is wound on the rotating rod and the middle part protrudes and contacts the traction plate. The traction plate is Z-shaped, and the middle part is movably connected to the traction linkage rod and corresponds to the circuit breaker body one by one. The traction plates are fixedly connected to each other through the traction linkage rod. When one of the traction rods moves, the traction linkage rod drives the other traction rods to move, and at the same time contacts and separates with the push rod, so as to realize the synchronous on and off of all circuit breaker bodies. The traction spring B can serve as a limit for the traction rod and can also reset the traction rod.

[0010] Furthermore, the housing also includes a synchronous shaft for mounting the circuit breaker body, which can rotate relative to the housing and drive all contact rods to rotate synchronously, so as to realize synchronous on and off of all circuit breaker bodies. A plurality of grooves A are provided inside the synchronous shaft at equal intervals and in a transverse manner. The circuit breaker body also includes a rotating shaft, a fixed shaft, a spring A and a tension spring, one end of the tension spring is fixed on the housing, and the other end is fixedly connected to the lower end of the contact rod, so as to ensure that the upper end of the contact rod has the power to rotate downward and contact the output pole piece. A fixed shaft is fixedly arranged at the contact rod adjacent to the tension spring, and a rotating shaft is arranged upward along the fixed shaft. Springs A are sleeved on both sides of the rotating shaft, and the middle of the spring A protrudes and can contact the groove A, serving as a limit stop of the contact rod, and the two ends extend outward and are fixed in the groove A; the spring A and the rotating shaft are arranged in the groove A, and the contact rod rotates relatively in the groove A through the rotating shaft, and the tension spring and the fixed shaft rotate with the contact rod and are reset by the spring A. When the contact rod contacts the output pole piece, spring A rotates upward with the circuit breaker body and pulls the rod to form a buckle, while storing elastic potential energy. When the push rod moves the traction rod downward, the traction rod pushes the middle part of spring A to disengage the traction rod from the buckle of spring A, thereby utilizing the elastic potential energy to quickly separate the contact rod from the output pole piece.

[0011] Furthermore, the synchronous shaft is cylindrical as a whole, and its cross section is L-shaped. The lower end is fixedly connected to the outer shell. The groove part A is obliquely provided with a limit baffle A, and the limit baffle A is concavely provided with a curved surface matching the contact rod. The limit baffle B is provided in the middle position of the outer shell, and the limit baffle B can contact the spring A. The protruding part of the spring A is U-shaped, and the contact part of the limit baffle B and the spring A is provided with a horizontal column with a triangular cross section, which serves as a buckle between the spring A and the limit baffle B. The groove part A is provided with a step edge from bottom to top, and the end of the step edge is semicircular, and the two sides of the rotating shaft are provided on the semicircular step edge. The groove part A is vertically provided with an arc-shaped convex ridge, and is fixed to the outer shell through the convex ridge. When the contact rod contacts the output pole piece, the contact rod contacts the limit baffle A at the same time. When the contact rod is separated from the output pole piece by the release, the spring A contacts the limit baffle B, and the protruding part of the spring A wraps around the column with a triangular cross section. Make sure that the contact lever moves within the range of motion of groove A and does not further separate from the synchronous shaft.

[0012] Furthermore, the shell part also includes an input support, an output support, a U-shaped groove and a groove C. The input support is a rectangular parallelepiped with a through hole A, which is arranged at the lower end of the shell part. A through groove is opened at the upper end of the input support for installing the input pole piece. The input pole piece is a sheet-like object with a rectangular cross-section and is mounted on the through groove. Screws fix the input support to the shell part, and the through hole A serves as a connection hole for the input wire. The U-shaped groove is vertically arranged at the middle end of the shell part and corresponds to the convex ridge. The convex ridge is installed in the U-shaped groove. The synchronous shaft is fixed to the shell part by the corresponding installation in the U-shaped groove. The groove C corresponds to the contact rod, which is used for the space for the contact rod to move up and down and the output support is arranged at the upper end of the groove C. The output support is arranged corresponding to the input support, and space is reserved for installing the output pole piece.

[0013] Furthermore, the zero-sequence transformer is hollowed out in the middle, with a circular groove portion B on the outside and a raised portion on the upper end. The connecting plate passes through the zero-sequence transformer from the hollowed-out part in the middle, a secondary coil is set in the circular groove portion B, a buckle is set on the raised portion to be fixedly connected with the outer shell, and an inwardly concave circular groove matching the outer circle of the zero-sequence transformer is set at the lower end of the outer shell to install the zero-sequence transformer. Under normal circumstances, the phase sum of the three-phase current of the three-phase four-wire circuit is equal to zero. When an electric shock or leakage fault occurs in the circuit, a leakage current flows through the loop. At this time, the phase sum of the three-phase current passing through the zero-sequence transformer is not equal to zero, and a residual current is generated. There is an induced voltage in the secondary coil of the zero-sequence transformer. This signal will be transmitted to the controller for comparison. If the current value is greater than the set current threshold, the controller controls the coil to energize and perform the opening action.

[0014] Furthermore, the zero-sequence transformer also includes a display terminal, a memory and a current detector, the memory and the current detector are electrically connected to the display terminal, the current detector is used to detect the current generated by the zero-sequence transformer and generate a signal to the display terminal, and the display terminal is used to store and record the current magnitude and time variation curve generated by the zero-sequence transformer for subsequent leakage fault analysis. When a circuit fault occurs, the current detector detects the residual current magnitude generated by the zero-sequence transformer in real time, records the occurrence time, and draws a current-time variation curve. At the same time, the operator can retrieve the current-time variation curve when the current circuit breaker is opened on the display terminal, so as to conduct further fault analysis and product improvement.

[0015] Furthermore, the output pole piece includes a flat support, a connector and a barb. The upper end of the output pole piece is a flat support, the middle end is a two-line connection part with a through hole, and the lower end is a barb in a U-shape. The ends are connected together, which is conducive to the arc extending on the output pole piece to cool and extinguish, preventing the arc from burning the shell, and playing the role of arc extinguishing. The flat support is provided with a threaded hole and a through hole B. The through hole B is connected to the output wire and fixedly connected to the shell through the threaded hole. The barb connection is in contact with the contact rod, and the connection part provides space for the contact rod to move up and down.

[0016] Furthermore, the circuit breaker body also includes a buzzer and an indicator light, which are interlocking switches with the contact rod and are electrically connected to the coil, and are installed on the outside of the housing. When the circuit breaker automatically operates the tripper due to leakage or other reasons, the contact rod is separated from the output pole piece, the buzzer alarms, and the indicator light flashes. When the circuit breaker is manually closed, the buzzer does not operate, and the indicator light goes out. When the contact rod is in normal contact with the output pole piece, the buzzer does not operate, and the indicator light is always on.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] 1. The imbalance of three-wire and four-wire will cause the zero-sequence transformer to generate residual current and the controller will control the release push rod to open the circuit breaker, effectively solving the problem of circuit breaker leakage and having a simple structure and easy use.

[0019] 2. The input electrodes of multiple contact rods are simultaneously passed through the zero-sequence transformer, and the zero-sequence transformer is electrically connected to the controller, thereby improving the accuracy and sensitivity of leakage detection. The zero-sequence transformer is provided with a display terminal, which can record the curve of the residual current generated by the zero-sequence transformer changing with time when the circuit fails, which is helpful for subsequent fault analysis and further product improvement.

[0020] 3. The traction mechanism and the synchronous shaft are set up to quickly disconnect the contact rods of all circuit breakers at the same time, with fast response speed, rapid opening, and significant leakage protection effect. The synchronous shaft can be installed in the shell only by using convex ridges and U-shaped grooves, which is easy to use. The synchronous shaft connects and fixes all circuit breaker bodies in series, which can achieve synchronous rotation and compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a three-dimensional schematic diagram of a circuit breaker with a leakage release according to the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of the positional relationship between a release and a circuit breaker of a circuit breaker with a leakage release according to the present invention;

[0024] Figure 3 It is a partial schematic diagram of a release device and a circuit breaker of a circuit breaker with a leakage release device of the present invention;

[0025] Figure 4 It is a three-dimensional schematic diagram of a release of a circuit breaker with a leakage release according to the present invention;

[0026] Figure 5 It is a cross-sectional view of a release of a circuit breaker with a leakage release of the present invention;

[0027] Figure 6 It is a three-dimensional schematic diagram of a housing portion of a circuit breaker with a leakage release according to the present invention;

[0028] Figure 7 It is a three-dimensional schematic diagram of a synchronous shaft of a circuit breaker with a leakage release according to the present invention;

[0029] Figure 8 It is a front view of a zero-sequence transformer of a circuit breaker with a leakage release according to the present invention;

[0030] Fig. 9 It is a three-dimensional schematic diagram of an output pole piece of a circuit breaker with a leakage release according to the present invention;

[0031] In the figure: 1. circuit breaker body, 101. contact rod, 102. rotating shaft, 103. fixed shaft, 104. spring A, 105. tension spring, 2. housing, 201. input support, 202. output support, 203. U-shaped groove, 3. tripper, 301. bracket, 302. coil, 303. reset block, 304. push rod, 305. handle, 4. controller, 5. zero sequence transformer, 501. annular groove part B, 502, raised portion, 6, output pole piece, 601, flat support, 602, connecting portion, 603, barb, 7, input pole piece, 8, connecting plate, 9, traction mechanism, 901, traction plate, 902, traction spring B, 903, traction housing, 904, rotating rod, 10, traction linkage rod, 11, synchronization shaft, 111, groove portion A, 112, limit baffle A, 113, limit baffle B, 114, convex ridge. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] See also Figure 1-9The present invention provides a technical solution: The present invention provides a circuit breaker with a leakage release, comprising a circuit breaker body 1, a housing 2 for installing the circuit breaker body 1, a release 3, a controller 4, a zero-sequence transformer 5, an output pole piece 6, an input pole piece 7, a traction mechanism 9 and a traction linkage rod 10. Four groups of circuit breaker bodies 1 with releases 3 are fixedly installed in one housing 2, and four groups of input pole pieces 7 and output pole pieces 6 are installed respectively. The release 3 and the controller 4 are fixed on the housing 2 as a whole, and are located directly above one of the circuit breaker bodies 1. The input pole pieces 7 are arranged side by side at the lower end of the housing 2 and are arranged in parallel with the circuit breakers in a one-to-one correspondence. The input pole pieces 7 are provided with a connecting plate 8, and the input pole pieces 7 are connected to the connecting plate 8 and pass through the zero-sequence transformer 5, and then the connecting plates 8 are respectively in contact with the corresponding circuit breaker bodies 1. The output pole pieces 6 are arranged at the upper end of the housing 2 in a one-to-one correspondence with the circuit breaker bodies 1. The circuit breaker body 1 is provided with a contact rod 101 and a traction rod. The contact rod 101 is movably connected to the output pole piece 6 . The traction rod is connected to the contact rod 101 and can drive the contact rod 101 to rotate.

[0034] The trip device 3 includes a bracket 301, a coil 302, a reset block 303, a reset rod, a push rod 304 and a handle 305. The bracket 301 is fixed to the housing 2 by a buckle, and an elastic member is arranged between the push rod 304 and the bracket 301. When the coil 302 is energized, the push rod 304 moves downward under the action of the electromagnetic force, and the elastic member is compressed. When the coil 302 stops being energized, the push rod 304 is reset by the action of the elastic member. The reset rod is arranged on the other side of the bracket 301 and is movably connected with the reset block 303. One end of the reset block 303 protrudes and contacts the push rod 304. The coil 302 and the zero-sequence mutual inductor 5 are electrically connected to the controller 4. A spring C is arranged between the handle 305 and the push rod 304. The handle 305 can be used to manually open the gate and adjust the position of the push rod 304 relative to the traction rod. The spring C is located directly above the coil 302 and is perpendicular to the coil 302. The push rod 304 extends from both sides of the coil 302 to the traction rod. The center of the bracket 301 is hollowed out to form a groove for accommodating the coil 302, and a cylinder is provided for the coil 302 to be wound. The coil 302 is electrically connected to the controller 4. The upper end of the bracket 301 is flat and exposes a through hole for the handle 305 to move up and down. The two sides of the lower end are respectively fixedly connected to the outer shell 2 by buckles, and a cavity is reserved at the center of the lower end for the push rod 304 and the traction rod to move together.

[0035] Due to the imbalance of the three-phase four-wire circuit, there will be a problem of leakage burning the circuit breaker body 1. When the circuit breaker body 1 has leakage, short circuit or the current exceeds the threshold value set by the zero-sequence transformer 5, the zero-sequence transformer 5 generates residual current and transmits it to the controller 4. The controller 4 sends an instruction to control the coil 302 to be energized. The coil 302 is energized to generate electromagnetic force to push the push rod 304 downward. The push rod 304 pushes the traction rod to rotate. The traction rod drives the contact rod 101 to rotate and separate from the output pole piece 6 to complete the opening. Thereby, the effect of automatic opening and circuit protection is achieved when leakage, short circuit or current exceeds the threshold value set by the zero-sequence transformer 5.

[0036] The traction mechanism 9 includes a traction plate 901, a traction spring B902, a traction housing 903 and a rotating rod 904. The traction linkage rod 10 is fixed to the bracket 301 by a buckle and the traction plates 901 are connected in series and arranged together. The lower end of the traction housing 903 is welded to the housing part 2 as a whole, and the upper end is fixedly connected to the bracket 301 by a buckle. The rotating rod 904 is fixed in a hole opened in the traction housing 903. The traction spring B902 is wound on the rotating rod 904 and the middle part protrudes into a U shape to contact the traction plate 901. The traction plate 901 is Z-shaped, and the middle part is movably connected to the traction linkage rod 10 and corresponds to the circuit breaker body 1 one by one. The two sides are arc-shaped plates, which are in contact with the contact rod 101 and the push rod 304 respectively. In this embodiment, the traction plate 901 replaces the traction rod. The traction plates 901 are fixedly connected to each other through the traction linkage rod 10. When one of the traction rods moves, the other traction rods move through the traction linkage rod 10, and at the same time contact and separate with the push rod 304, so as to achieve the synchronous on and off of all the circuit breaker bodies 1. The traction spring B902 can be used as a limiter for the traction rod and can also reset the traction rod. Each circuit breaker body 1 is equipped with a traction mechanism 9. The use of the traction mechanism 9 can quickly respond to the opening action and detach all the contact rods 101 from the output pole piece 6.

[0037] The housing 2 also includes a synchronous shaft 11, an input support 201, an output support 202, a U-shaped groove 203 and a groove C for mounting the circuit breaker body 1. The synchronous shaft 11 is cylindrical as a whole, and its cross section is L-shaped. A plurality of grooves A111 are provided inside the synchronous shaft 11 at equal intervals and in a transverse manner. The input support 201 is a rectangular parallelepiped with a through hole A, and is arranged at the lower end of the housing 2. A through groove is provided at the upper end of the input support 201 for mounting the input pole piece 7. The input pole piece 7 is a sheet-like object with a rectangular cross section mounted on the through groove, and the input support 201 is fixedly connected to the housing 2 with screws, and the through hole A serves as a connection hole for the input wire. The groove A111 is vertically provided with an arc-shaped convex rib 114, and the U-shaped groove 203 is vertically provided at the middle end of the housing 2 and corresponds to the convex rib 114. The convex rib 114 is installed in the U-shaped groove 203, and the synchronous shaft 11 is fixed to the housing 2 by the convex rib 114 correspondingly installed in the U-shaped groove 203. The synchronous shaft 11 can rotate relative to the housing 2 through the convex ridge 114 and the U-shaped groove 203, and drive the contact rod 101 to rotate synchronously, so as to realize the synchronous on and off of all the circuit breaker bodies 1. The groove C corresponds to the contact rod 101, and is used as a space for the contact rod 101 to move up and down. An output support 202 is arranged at the upper end of the groove C. The output support 202 is arranged corresponding to the input support 201, and a space is reserved for installing the output pole piece 6.

[0038] The circuit breaker body 1 also includes a rotating shaft 102, a fixed shaft 103, a spring A104 and a tension spring 105. One end of the tension spring 105 is fixed on the housing 2, and the other end is fixedly connected to one end of the contact rod 101. The fixed shaft 103 is fixedly arranged at the contact rod 101 adjacent to the tension spring 105. The fixed shaft 103 is fixedly connected to the synchronization shaft 11. The contact rod 101 is provided with a rotating shaft 102 upward along the fixed shaft 103. The springs A104 are sleeved on both sides of the rotating shaft 102. The spring A104 protrudes in the middle and can contact the groove A111, serving as a limit stop for the contact rod 101. Both ends extend outward and are fixed in the groove A111. The lower end of the contact rod 101, the spring A104 and the fixed shaft 103 are arranged in the groove A111. When the contact rod 101 contacts the output pole piece 6, the spring A104 rotates upward with the circuit breaker body 1 and pulls the rod to form a buckle, while storing elastic potential energy, and the tension spring 105 is stretched. When the push rod 304 moves the traction rod downward, the traction rod pushes the middle part of the spring A104 to disengage the traction rod from the buckle of the spring A104, thereby utilizing the elastic potential energy to quickly separate the contact rod 101 from the output pole piece 6.

[0039] The groove portion A111 is provided with a limit baffle A112 obliquely upward, and the limit baffle A112 is provided with a curved surface matching the contact rod 101. A limit baffle B113 is provided in the middle of the shell portion 2, and the limit baffle B113 can contact the spring A104. The protruding portion of the spring A104 is U-shaped, and a horizontal column with a triangular cross-section is provided at the contact portion between the limit baffle B113 and the spring A104, which serves as a buckle between the spring A104 and the limit baffle B113. The groove portion A111 is provided with a stepped edge from bottom to top, and the end of the stepped edge is semicircular, and the two sides of the rotating shaft 102 are provided on the semicircular stepped edge. When the contact rod 101 contacts the output pole piece 6, the contact rod 101 contacts the limit baffle A112 at the same time. When the contact rod 101 is separated from the output pole piece 6 by the release 3, the spring A104 contacts the limit baffle B, and the protruding part of the spring A104 wraps the column with a triangular cross section, ensuring that the contact rod 101 moves within the range of motion of the groove A111 and will not further separate from the synchronization shaft 11.

[0040] The middle of the zero-sequence transformer 5 is hollowed out to form a through hole, the outer side is a circular groove portion B501, a raised portion 502 is arranged at the upper end, and a baffle of the circular groove portion B501 is arranged on the back. The connecting plate 8 passes through the zero-sequence transformer 5 from the hollowed-out middle part, the circular groove portion B501 is arranged with a secondary coil, the raised portion 502 is provided with a buckle and fixedly connected with the shell portion 2, and the lower end of the shell portion 2 is provided with an inwardly concave circular groove matching the outer circle of the zero-sequence transformer 5, which is used to install the zero-sequence transformer 5. Under normal circumstances, the phase sum of the three-phase current of the three-phase four-wire circuit is equal to zero. When an electric shock or leakage fault occurs in the circuit, a leakage current flows through the circuit. At this time, the phase sum of the three-phase current passing through the zero-sequence transformer 5 is not equal to zero, and a residual current will be generated. There is an induced voltage in the secondary coil of the zero-sequence transformer 5. This signal will be transmitted to the controller 4 for comparison. If the current value is greater than the set current threshold, the controller 4 controls the coil 302 to be energized and performs the opening action.

[0041] The zero-sequence transformer 5 also includes a display terminal, a memory and a current detector. The memory and the current detector are electrically connected to the display terminal. The current detector is used to detect the current generated by the zero-sequence transformer 5 and generate a signal to the display terminal. The display terminal is used to store and record the current magnitude and time variation curve generated by the zero-sequence transformer 5 for subsequent leakage fault analysis. When a circuit fault occurs, the current detector detects the residual current magnitude generated by the zero-sequence transformer 5 in real time, records the occurrence time, and draws a current-time variation curve. At the same time, the operator can retrieve the current-time variation curve when the current circuit breaker is opened at the display terminal, so as to conduct further fault analysis and product improvement.

[0042] The output pole piece 6 includes a flat support 601, a connector and a barb 603. The upper end of the output pole piece 6 is a flat support 601, the middle end is a two-line connection part 602 with a through hole, and the lower end is a barb 603. The barb 603 is U-shaped, and the ends are connected together. In this way, it is beneficial to extend the arc on the output pole piece 6 to cool and extinguish, prevent the arc from burning the shell part 2, and play the role of arc extinguishing. The flat support 601 is provided with a threaded hole and a through hole B. The through hole B is connected to the output wire and fixedly connected to the shell part 2 through the threaded hole. The connection of the barb 603 contacts the contact rod 101. The barb 603 can also realize the effective connection between the output pole piece 6 and the contact rod 101. The connection part 602 provides space for the contact rod 101 to move up and down.

[0043] The circuit breaker body 1 also includes a buzzer and an indicator light, which are used to remind the operator of the working status of the circuit breaker. The buzzer and the indicator light are interlocked with the contact rod 101 and are electrically connected to the coil 302. The buzzer and the indicator light are installed on the outside of the housing 2. When the circuit breaker automatically operates the tripper 3 due to leakage or other reasons, the contact rod 101 is separated from the output pole piece 6, the buzzer alarms, and the indicator light flashes. When the circuit breaker is manually closed, the buzzer does not operate and the indicator light goes out. When the contact rod 101 is in normal contact with the output pole piece 6, the buzzer does not operate and the indicator light is always on.

[0044] It should be noted that, in this article, relational terms such as front, back, upper, lower, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or elements that are inherent to such process, method, article, or device.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit breaker with a leakage release, comprising a plurality of circuit breaker bodies (1) and a housing (2) for mounting the circuit breaker bodies, characterized in that: The circuit breaker with a leakage release further comprises a release (3), a controller (4), a zero-sequence transformer (5), a plurality of output pole pieces (6) and a plurality of input pole pieces (7); the release (3) and the controller (4) are fixed on the housing (2) as a whole and are located directly above one of the circuit breaker bodies (1); the input pole pieces (7) are arranged at the lower end of the housing (2) and are arranged in parallel with the circuit breakers in a one-to-one correspondence; the input pole pieces (7) are provided with connecting plates (8); the input pole pieces (7) are connected to the connecting plates (8) and pass through the zero-sequence transformer (5); and then the connecting plates (8) are respectively in contact with the corresponding circuit breaker bodies (1); the output pole pieces (6) is arranged at the upper end of the housing (2) in a one-to-one correspondence with the circuit breaker body (1); the circuit breaker body (1) comprises a traction rod and a contact rod (101); the contact rod (101) is in a long strip shape and can be movably connected to the output pole piece (6); the traction rod is fixedly connected to the contact rod (101) and can drive the contact rod (101) to rotate; the release (3) comprises a bracket (301), a coil (302), a reset block (303), a reset rod and a push rod (304); the bracket (301) is fixed on the housing (2); the coil (302) is transversely fixed in the bracket (301); the push rod (304) is movably connected to one side of the bracket (301); The reset rod is arranged on the other side of the bracket (301) and is movably connected to the reset block (303); one end of the reset block (303) protrudes and contacts the push rod (304); the coil (302) and the zero-sequence mutual inductor (5) are electrically connected to the controller (4); the tripper (3) further comprises a handle (305); a spring C is arranged between the handle (305) and the push rod (304); the spring C is arranged directly above the coil (302) and is perpendicular to the coil (302); the push rod (304) extends from both sides of the coil (302) to the traction rod; the center of the bracket (301) is hollowed out to form a groove for accommodating the coil, and a cylinder is arranged for the coil (302) to be wound around. (302) and the controller (4) are electrically connected; the upper end of the bracket (301) is flat and exposes a through hole for the handle (305) to move up and down; the two sides of the lower end are respectively fixedly connected to the housing (2); a cavity is reserved at the center of the lower end for the push rod (304) and the traction rod to interact; the circuit breaker with the leakage release also includes a traction mechanism (9) and a traction linkage rod (10); each circuit breaker body (1) is equipped with a traction mechanism (9); the traction mechanism (9) includes a traction plate (901), a traction spring B (902), a traction housing (903) and a rotating rod (904); the traction linkage rod (10) is fixed to the bracket (301);The lower end of the traction housing (903) is fixedly connected to the housing portion (2), and the upper end is fixedly connected to the bracket (301). The rotating rod (904) is fixed in the traction housing portion (2). The traction spring B (902) is wound around the rotating rod (904) and the middle part protrudes to contact the traction plate (901). The traction plate (901) is Z-shaped and is movably connected to the traction linkage rod (10) in the middle and corresponds to the circuit breaker body (1) one by one. The traction plates (901) are fixedly connected to each other through the traction linkage rod (10). The housing portion (2) also includes a mounting plate for mounting the circuit breaker body. The circuit breaker body (1) comprises a synchronous shaft (11) of the housing (1), the synchronous shaft (11) being rotatable relative to the housing (2), and a plurality of grooves A (111) being arranged in a transversely inclined manner at equal intervals inside the synchronous shaft; the circuit breaker body (1) further comprises a rotating shaft (102), a fixed shaft (103), a spring A (104) and a tension spring (105), one end of the tension spring (105) being fixed to the housing (2), and the other end being fixedly connected to the lower end of the contact rod (101), the fixed shaft (103) being fixedly arranged at a position adjacent to the tension spring (105) of the contact rod (101), and the fixed shaft (103) and the synchronous shaft ( 11) is fixedly connected, the contact rod (101) is provided with a rotating shaft (102) upwardly along the fixed shaft (103), and springs A (104) are sleeved on both sides of the rotating shaft (102); the spring A (104) protrudes in the middle and can contact the groove portion A (111), and the two ends extend outward and are fixed in the groove portion A (111); the rotating shaft (102) is arranged in the groove portion A (111), the zero sequence mutual inductor (5) is hollow in the middle, the outer side is a circular groove portion B (501), and the upper end is provided with a protruding portion (502); the connecting plate (8) passes through the zero sequence mutual inductor from the hollow part in the middle A zero-sequence transformer (5), wherein the secondary coil is arranged in the annular groove portion B (501), the convex portion (502) is provided with a buckle and fixedly connected with the shell portion (2), and the lower end of the shell portion (2) is provided with an inwardly concave annular groove matching the outer circle of the zero-sequence transformer (5), the zero-sequence transformer (5) further comprising a display terminal, a memory and a current detector, the memory and the current detector being electrically connected to the display terminal, the current detector being used to detect the current generated by the zero-sequence transformer (5) and generate a signal to the display terminal, and the display terminal being used to store and record the current magnitude and time variation curve generated by the zero-sequence transformer (5). ; 2. A circuit breaker with a leakage release according to claim 1, characterized in that: The synchronizing shaft (11) is cylindrical as a whole, and has an L-shaped cross section. The lower end is fixedly connected to the outer shell (2). A limit baffle A (112) is arranged obliquely upward on the groove portion A (111). The limit baffle A (112) is concavely arranged with a curved surface matching the contact rod (101). A limit baffle B (113) is arranged in the middle of the groove portion A (111). The limit baffle B (113) can contact the spring A (104). The protruding portion of the spring A (104) is U-shaped. The contact portion of the limit baffle B (113) and the spring A (104) is arranged with a horizontal column with a triangular cross section. The groove portion A (111) is provided with a stepped edge from bottom to top, and the end of the stepped edge is semicircular. The two sides of the rotating shaft (102) are arranged on the semicircular stepped edge. The groove portion A (111) is vertically provided with an arc-shaped convex ridge (114).

3. A circuit breaker with a leakage release according to claim 2, characterized in that: The shell portion (2) further comprises an input support (201), an output support (202), a U-shaped groove (203) and a groove C; the input support (201) is in the form of a rectangular parallelepiped with a through hole A, and is arranged at the lower end of the shell portion (2); a through groove is formed at the upper end of the input support (201); the input pole piece (7) is in the form of a sheet and is mounted on the through groove, and is fixedly connected to the input support (201); the U-shaped groove (203) is vertically arranged at the middle end of the shell portion (2) and corresponds to the convex ridge (114), and the convex ridge (114) is installed in the U-shaped groove (203); the groove C corresponds to the contact rod (101), and the output support (202) is arranged corresponding to the input support (201).

4. A circuit breaker with a leakage release according to claim 1, characterized in that: The output pole piece (6) comprises a flat support (601), a connecting portion (602) and a barb (603); the upper end of the output pole piece (6) is the flat support (601), the middle end is the connecting portion (602) with two through holes, and the lower end is the barb (603), and the barb (603) is U-shaped, and the ends are connected together; the flat support (601) is provided with a threaded hole and a through hole B, the barb (603) is in contact with the contact rod (101), and the connecting portion (602) provides space for the contact rod (101) to move up and down.

5. A circuit breaker with a leakage release according to claim 1, characterized in that: The circuit breaker body (1) further comprises a buzzer and an indicator light, the buzzer and the indicator light are interlocking switches with the contact rod (101), and are electrically connected to the coil (302), and the buzzer and the indicator light are mounted on the outside of the housing (2).

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