Leakage protection circuit breaker

Abstract

An electric leakage protection circuit breaker comprises an electric leakage protection electrode and a circuit breaker electrode, and the electric leakage protection electrode is provided with an electric leakage power supply contact composed of a movable contact piece and a static contact piece, and a driving piece used for driving the movable contact piece and the static contact piece to be in contact and separated. An electric leakage power supply contact formed by the movable contact piece and the static contact piece is connected in series in a power supply loop for supplying power to the electronic component board and / or the electric leakage tripper, the driving piece is linked with an operating mechanism of the circuit breaker pole, and when a main loop of the circuit breaker pole is conducted, the driving piece is driven by the operating mechanism to drive the movable contact piece to be in contact with the static contact piece so as to supply power to the electric leakage tripper. Switching on the power supply loop; when the main loop of the circuit breaker pole is disconnected, the driving piece is driven by the operating mechanism to drive the movable contact piece to be separated from the static contact piece, or the driving piece is driven by the operating mechanism to be away from the movable contact piece, the movable contact piece is reset to the position separated from the static contact piece, and the power supply loop is disconnected. Damage caused by reverse connection of the wire inlet end and the wire outlet end of the circuit breaker pole by mistake during wiring is avoided.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a leakage protection circuit breaker. Background Art

[0002] Low-voltage circuit breakers are used to distribute electrical energy and protect circuits and power equipment from overloads and short circuits. They can also be used for infrequent circuit switching and motor starting. For electronic leakage circuit breakers, because the electronic component board draws power from one end of the main circuit, and typically draws power from the product's outlet, it is specified that the power supply can only be connected to the product's input terminal. However, if the user mistakenly connects the power supply to the product's outlet terminal, the electronic component board will remain energized. If leakage current flows in the main circuit at this time, or if a test button is pressed to simulate leakage current, the leakage circuit breaker will still operate and burn the circuit breaker coil, causing the leakage protection function to fail.

[0003] Furthermore, when the load is highly inductive or capacitive, if the main circuit power is suddenly disconnected or the circuit breaker is opened, the highly inductive or capacitive load will generate a reverse electromotive force. Because the electronic component board of the electronic leakage circuit breaker draws power through the output terminal, the reverse electromotive force generated by the load will be directly applied to the electronic component board. At this time, if there is leakage current in the main circuit or the test button is pressed, the reverse electromotive force directly applied to the electronic component board will be directly applied to both ends of the leakage release coil, causing the coil to burn out and causing the leakage function to fail. Summary of the Invention

[0004] The purpose of the present invention is to overcome at least one defect of the prior art and provide a leakage protection circuit breaker.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A leakage protection circuit breaker includes a leakage protection pole and at least one circuit breaker pole arranged side by side. The leakage protection pole includes a zero-sequence current transformer, an electronic component board, and a leakage release. The circuit breaker pole includes a handle, an operating mechanism, and a main circuit. The handle drives the main circuit to be turned on and off through the operating mechanism. The leakage release includes a leakage trip coil and a leakage trip iron core driven by the leakage trip coil.

[0007] The leakage protection pole is provided with a leakage power supply contact consisting of a dynamic contact and a static contact, and a driving member for driving the dynamic contact to contact and separate with the static contact. The leakage power supply contact consisting of the dynamic contact and the static contact is connected in series in the power supply circuit for supplying power to the electronic component board and / or the leakage release. The driving member is linked to the operating mechanism of the circuit breaker pole.

[0008] When the main circuit of the circuit breaker pole is turned on, the driving member drives the moving contact member to contact the static contact member under the driving of the operating mechanism, thereby connecting the power supply circuit;

[0009] When the main circuit of the circuit breaker pole is disconnected, the driving member drives the moving contact and the static contact to separate under the drive of the operating mechanism, or the driving member is driven away from the moving contact under the drive of the operating mechanism, and the moving contact is reset to a position separated from the static contact, thereby disconnecting the power supply circuit.

[0010] Preferably, a slide groove is provided on the housing of the circuit breaker pole and / or the housing of the leakage protection pole, and the driving member is slidably arranged in the slide groove. The driving member moves linearly along the length direction of the slide groove under the drive of the operating mechanism.

[0011] Preferably, sliding holes are provided on the side walls of the circuit breaker pole housing and the leakage protection pole housing that are in close contact with each other as sliding grooves, and the driving member is slidably arranged in the sliding grooves. The driving member moves linearly along the length direction of the sliding groove under the drive of the operating mechanism.

[0012] Preferably, the dynamic contact includes an elastic portion arranged in the moving direction of the driving member. When the circuit breaker pole is closed, the operating mechanism drives the driving member to move along the slide groove and push the elastic portion, so that the elastic portion contacts the static contact member. When the circuit breaker pole is opened or the operating mechanism is tripped due to a fault, the operating mechanism drives the driving member to move along the slide groove and away from the elastic portion.

[0013] Preferably, a linkage hole is provided on one side of the slide groove, and the linkage hole is used to pass the trip shaft. One end of the trip shaft is connected to the operating mechanism of the circuit breaker pole. When the leakage release is actuated, the other end of the trip shaft is pushed, so that the trip shaft drives the operating mechanism to trip, and the linkage hole is connected to the sliding hole.

[0014] Preferably, the operating mechanism includes a rotating plate and a trip buckle and a lock buckle respectively rotatably arranged on the rotating plate. The trip buckle is connected to the handle through a connecting rod. The lock buckle is used to lock the trip buckle with the rotating plate, so that the handle can drive the contact support to rotate through the trip buckle. The main circuit includes a moving contact and a static contact. The moving contact is arranged on the rotating plate. When the rotating plate rotates, it drives the moving contact to contact and separate with the static contact to respectively turn on and off the main circuit.

[0015] Preferably, the lock includes a rotating part and a locking part on one side of the rotating part. The rotating part is rotatably mounted on the rotating plate through the lock shaft. The locking part is used to lock the jump buckle. The driving member is provided with a driving hole sleeved on the lock shaft. When the lock rotates with the rotating plate, the driving member is driven to move through the lock shaft.

[0016] Preferably, the driving member includes a driving rod and a first boss and a second boss respectively arranged at both ends of the driving rod, the first boss and the second boss are relatively arranged on both sides of the driving rod close to and away from the circuit breaker pole, the first boss is used to be inserted into the circuit breaker pole, and a driving hole is provided on the first boss, and the second boss protrudes along the width direction of the shell and extends to the side of the moving contact.

[0017] Preferably, a pushing surface is provided on the second boss, and the pushing surface is arranged at an oblique angle to the moving direction of the driving member. The dynamic contact member includes an elastic part arranged in the moving direction of the driving member, and the elastic part is arranged parallel to the pushing surface on the driving member when it is not in contact with the static contact member.

[0018] Preferably, the second boss includes a first protrusion and a second protrusion connected between the first protrusion and the driving rod, the width of the first protrusion is smaller than the width of the second protrusion, and the pushing surface is provided on the first protrusion.

[0019] Preferably, the dynamic contact includes a fixed part and an elastic part connected to the fixed part, the fixed part is fixedly arranged and connected to the power supply circuit, the shell of the leakage protection electrode is provided with a first limiting groove for limiting the fixed part, and a second limiting groove for limiting the static contact, the elastic part is inclined on the side close to the static contact, and the driving part is located on the side of the elastic part away from the static contact, and the driving part is used to push the elastic part of the dynamic contact to bend toward the static contact and contact with the static contact.

[0020] Preferably, the static contact is connected to the first wire, the dynamic contact is connected to the second wire, the second wire is used to connect one end of the leakage trip coil, and the other end of the electric trip coil is connected to the third wire, and the first wire and the third wire are respectively connected to the electronic component board; the first limiting groove and the second limiting groove are respectively provided with a first wiring port and a second wiring port on the sides away from each other, and the first wiring port and the second wiring port are respectively used to pass the second wire and the first wire, so that the second wire and the first wire are connected to the dynamic contact and the static contact, respectively.

[0021] Preferably, the leakage protection pole also includes an indication mechanism that cooperates with the leakage release, and the indication mechanism includes an indication button, a push plate and an indication spring. The indication button is slidably arranged, and the indication spring is connected to the indication button. The indication button includes an indication part and a limiting part. Pressing the indication part can cause the indication button to compress the indication spring and move it in the direction of retracting the shell to the first indication position. At the same time, the push plate locks the limiting part, so that the indication button is locked in the first indication position; when the leakage release is actuated, the push plate is pushed to drive the tripping shaft, so that the operating mechanism of the circuit breaker pole is tripped. At the same time, the push plate unlocks the limiting part, and the indication spring drives the indication button to move, so that the indication part moves to the second indication position in the direction of extending outside the shell.

[0022] Preferably, the leakage protection electrode further includes a test button and a test circuit, the test button is used to close the test circuit to simulate a leakage current signal, and the test button and the indicator mechanism are respectively arranged on opposite sides of the leakage release along the length direction of the shell of the leakage protection electrode.

[0023] Preferably, the dynamic contact is arranged on the driving member, and the static contact is fixedly arranged in the leakage protection electrode.

[0024] The leakage protection circuit breaker created by the present invention uses a dynamic contact and a static contact to form a leakage power supply contact, and the driving member is linked with the operating mechanism. The leakage power supply contact controls the electronic component board and / or the leakage release to draw power from the power supply. When the operating mechanism drives the leakage protection circuit breaker to close, it also drives the leakage power supply contact to close and supply power to the electronic component board and / or the leakage release. When the leakage protection circuit breaker is opened, the operating mechanism simultaneously drives the leakage power supply contact to open, and current cannot pass through the electronic component board and / or the leakage release. Even if the input and output terminals of the circuit breaker pole are mistakenly connected reversely during wiring, or when a highly inductive or capacitive load is connected, the leakage release coil and the electronic component board of the leakage release will not be burned, which can greatly improve the reliability of the circuit breaker.

[0025] In addition, by locating the end of the driving member used for connecting to the operating mechanism between the push plate and the first side plate, not only can the utilization rate of the space in the housing be improved and the volume be avoided, but the driving member can also be arranged on one side of the tripping shaft, so that the slide groove can be adjacent to and connected to the linkage hole, avoiding major changes to the overall structure of the circuit breaker housing and reducing processing costs.

[0026] Furthermore, a pushing surface is provided on the second boss, angled relative to the direction of movement of the driver. When not in contact with the static contact, the elastic portion lies parallel to the pushing surface on the driver. This parallel arrangement of the pushing surface and elastic portion facilitates the driver's movement of the moving contact, ensuring smoother engagement and preventing problems such as jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the leakage protection circuit breaker created by the present invention;

[0028] Figure 2 It is a structural diagram of a circuit breaker pole created by the present invention;

[0029] Figure 3-4 This is a schematic diagram of the structure of the leakage protection electrode created by the present invention;

[0030] Figure 5 This is a schematic diagram of the coordination of the circuit breaker pole, drive member, dynamic contact member and static contact member created by the present invention;

[0031] Figure 6It is a structural schematic diagram of the housing of the circuit breaker pole created by the present invention;

[0032] Figure 7 This is a schematic structural diagram of the operating mechanism, moving contact and overload tripping mechanism created by the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the driving member created by the present invention;

[0034] Figure 9 This is a circuit schematic diagram of the present invention when the leakage power supply contact is used to control the power supply of the electronic component board;

[0035] In the figure, leakage protection pole 1; circuit breaker pole 2; moving contact 21; static contact 22; overload tripping mechanism 23; short-circuit tripping mechanism 24; operating mechanism 25; handle 26; rotating plate 251; tripping catch 252; lock catch 253; connecting rod 254; lock catch rotating shaft 255; rotating portion 256; locking portion 257; leakage release 3; leakage tripping iron core 33; moving contact 4; elastic portion 41; fixed portion 42; static contact 5; driving member 6; slide groove 60; driving hole 61; driving rod 62; first boss 63; second boss 64; first raised portion 641; second raised portion 642; pushing surface 65; linkage hole 601; first side plate 11; second side plate 12; first partition plate 13; second partition plate 14; first limiting groove 101; second limiting groove 102; first wiring port 1011; second wiring port 1021; second wire 72; indicating mechanism 8; indicating button 81; pushing plate 82; indicating portion 811; limiting portion 812. DETAILED DESCRIPTION

[0036] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the leakage protection circuit breaker created by the present invention. The leakage protection circuit breaker created by the present invention is not limited to the description of the following embodiments.

[0037] like Figure 1-2As shown, the leakage protection circuit breaker of this embodiment includes a leakage protection pole 1 and at least one circuit breaker pole 2 arranged side by side. In this embodiment, four circuit breaker poles 2 are arranged side by side. When the circuit breaker pole 2 is a phase pole, it includes a main circuit consisting of an input terminal, an output terminal, a moving contact 21, a static contact 22, an overload tripping mechanism 23 and a short-circuit tripping mechanism 24, and an operating mechanism 25 for driving the moving contact 21 to contact and separate with the static contact 22. The input terminal and the output terminal are used to connect the power supply and the load respectively. The moving contact 21 and the static contact 22 are connected to the input terminal and the output terminal respectively. The overload tripping mechanism 23 and the short-circuit tripping mechanism 24 are connected in series in the main circuit. The handle 26 drives the movable contact 21 and the static contact 22 to contact or separate through the operating mechanism 25, thereby realizing the connection and disconnection of the main circuit of the circuit breaker pole 2. When the circuit breaker pole 2 is an N-pole, it usually only includes an incoming terminal, an outgoing terminal, a movable contact 21 and a static contact 22, and an operating mechanism 25 for driving the movable contact 21 and the static contact 22 to contact and separate. The overload tripping mechanism 23 and the short-circuit tripping mechanism 24 are not provided. Of course, it is also possible to not provide an N-pole circuit breaker pole 2 and only provide a phase-pole circuit breaker pole 2. The leakage protection pole 1 includes a zero-sequence current transformer, an electronic component board and a leakage release 3. The zero-sequence current transformer is electrically connected to the electronic component board, and the electronic component board is electrically connected to the leakage release 3. The main circuits of the four circuit breaker poles 2 respectively pass through the zero-sequence current transformer. The zero-sequence current transformer is used to sense the leakage current in the main circuit and transmit the leakage signal to the leakage detection circuit of the electronic component board. The leakage detection circuit is used to process the leakage signal and drive the leakage release 3 to operate when the leakage signal meets the conditions, so that the leakage release 3 drives the operating mechanism 25 to trip. The tripped operating mechanism 25 drives the moving contact 21 and the static contact 22 to separate, disconnecting the main circuit to achieve the protection function.

[0038] The operating mechanism 25 includes a rotating plate 251 and an energy storage spring connected to the rotating plate 251. The rotating plate 251 is provided with a rotatable jump buckle 252 and a lock buckle 253. The jump buckle 252 and the lock buckle 253 are snap-fitted together. A connecting rod 254 is provided between the jump buckle 252 and the handle 26. The two ends of the connecting rod 254 are rotatably connected to the handle 26 and the jump buckle 252, so that the handle 26 is connected to the jump buckle 252 through the connecting rod 254. When 52 and the lock buckle 253 are snapped together, the lock buckle 253 locks the jump buckle 252 with the rotating plate 251. When the handle 26 pushes the jump buckle 252 through the connecting rod 254, the jump buckle 252 can drive the contact 21 to support rotation. When the handle 26 rotates in two opposite directions, the rotating plate 251 can drive the moving contact 21 to contact and separate from the static contact 22. When the moving contact 21 contacts the static contact 22, the rotating plate 251 compresses the energy storage spring and is locked by the handle 26.

[0039] The leakage release 3, overload tripping mechanism 23 and short-circuit tripping mechanism 24 respectively trigger the lock buckle 253 to unlock the trip buckle 252 when the leakage current, short-circuit current and overload current conditions are met, that is, drive the operating mechanism 25 to trip. At this time, when the handle 26 rotates, it cannot drive the contact 21 to support rotation through the trip buckle 252, and the handle 26 loses the lock on the rotating plate 251. The energy storage spring is released. When the energy storage spring is released, it drives the contact 21 to support rotation, so that the moving contact 21 is separated from the static contact 22, and the leakage protection, short-circuit protection and overload protection functions are realized.

[0040] The short-circuit releaser usually includes a short-circuit tripping coil and a short-circuit iron core driven by the short-circuit tripping coil. The short-circuit tripping coil is connected to the static contact 22. When the short-circuit current flowing through the short-circuit tripping coil meets the action condition, the short-circuit tripping coil drives the short-circuit iron core to move, and the short-circuit iron core directly or indirectly triggers the lock buckle 253 and the jump buckle 252 to release.

[0041] The overload release usually includes a bimetallic strip connected to the moving contact 21. When the overload current flowing through the bimetallic strip meets the action condition, the bimetallic strip bends due to temperature rise, thereby directly or indirectly triggering the lock buckle 253 and the trip buckle 252 to release.

[0042] One improvement of this embodiment is that Figure 3-4 As shown, the leakage protection pole 1 is provided with a leakage power supply contact consisting of a dynamic contact 4 and a static contact 5, and a driving member 6 for driving the dynamic contact 4 to contact and separate with the static contact 5. The leakage power supply contact consisting of the dynamic contact 4 and the static contact 5 is connected in series in the power supply circuit for supplying power to the electronic component board and / or the leakage release 3. The driving member 6 is linked with the operating mechanism 25 of the circuit breaker pole 2. When the main circuit of the circuit breaker pole 2 is connected, the driving member 6 drives the dynamic contact 4 to contact with the static contact 5 under the drive of the operating mechanism 25, thereby connecting the power supply circuit; when the main circuit of the circuit breaker pole 2 is disconnected, the driving member 6 drives the dynamic contact 4 to separate with the static contact 5 under the drive of the operating mechanism 25, or the driving member 6 moves away from the dynamic contact 4 under the drive of the operating mechanism 25, and the dynamic contact 4 is reset to a position separated from the static contact 5, thereby disconnecting the power supply circuit.

[0043] The leakage protection circuit breaker of this embodiment uses a dynamic contact 4 and a static contact 5 to form a leakage power contact. The driver is linked to the operating mechanism 25, and the leakage power contact controls the electronic component board and / or the leakage release 3 to draw power from the power supply. When the operating mechanism 25 drives the leakage protection circuit breaker to close, it also drives the leakage power contact to close and supply power to the electronic component board and / or the leakage release 3. When the leakage protection circuit breaker is opened, the operating mechanism 25 simultaneously drives the leakage power contact to open, preventing current from passing through the electronic component board and / or the leakage release 3. Even if the input and output terminals of the circuit breaker pole 2 are mistakenly connected during wiring, or if a highly inductive or capacitive load is connected, the leakage trip coil of the leakage release 3 and the electronic component board will not be damaged, thereby greatly improving the reliability of the circuit breaker.

[0044] The leakage release 3 includes a leakage release coil and a leakage release iron core 33 driven by the leakage release coil. The electronic component board is provided with a switch element and a leakage detection circuit. The switch element is connected in series in the circuit that supplies power to the leakage release 3 and draws power from the power supply. The leakage detection circuit can control the switching element to close and open. The leakage detection circuit closes the switch element when the leakage current in the main circuit of the circuit breaker pole 2 meets the conditions. The switching element can be an electronic switch such as a relay or a MOS tube. In one embodiment of connecting the leakage power supply contact to the power supply circuit, the electronic component board draws power from the power supply through the leakage power supply contact, and the circuit that supplies power to the electronic component board serves as the power supply circuit. The leakage power supply contact is only used to control the power supply circuit that supplies power to the electronic component board. Alternatively, the leakage release coil, the switch element, and the leakage power supply contact are connected in series to draw power from the power supply as the power supply circuit. The leakage power supply contact is used to control the power supply circuit that supplies power to the leakage release coil of the leakage release 3. Of course, the leakage power supply contact can also be used to control a power supply circuit that supplies power to the electronic component board and the leakage trip coil at the same time.

[0045] When the handle 26 drives the operating mechanism 25 to drive the leakage protection circuit breaker to close, it also drives the leakage power supply contact to close and supply power to the electronic component board and / or the leakage release 3. After the leakage detection circuit detects the leakage fault, it triggers the switching element to close, and the leakage trip coil attracts the leakage trip iron core 33 to operate. When the leakage trip iron core 33 operates, it triggers the lock 253 of the circuit breaker pole 2 to unlock the trip 252, and drives the moving contact 21 and the static contact 22 to separate and disconnect the main circuit of the circuit breaker pole 2 through the operating mechanism 25. While the moving contact 21 and the static contact 22 of the circuit breaker pole are separated, the operating mechanism 25 of the circuit breaker pole drives the moving contact 4 and the static contact 5 to separate through the driving member 6, and stops supplying power to the electronic component board and / or the leakage trip coil.

[0046] like Figure 3-5As shown, a slide groove 60 is provided on the housing of the circuit breaker pole and / or the housing of the leakage protection pole 1, and the driving member 6 is slidably arranged in the slide groove 60. The driving member 6 moves linearly along the length direction of the slide groove 60 under the drive of the operating mechanism 25. The dynamic contact 4 includes an elastic portion 41 arranged in the moving direction of the driving member 6. When the circuit breaker pole is closed, the operating mechanism 25 drives the driving member 6 to move downward along the slide groove 60 and push the elastic portion 41, so that the elastic portion 41 contacts the static contact 5. When the circuit breaker pole is opened, or when the operating mechanism 25 is tripped due to a fault, the operating mechanism 25 drives the driving member 6 to move upward along the slide groove 60 and away from the elastic portion 41, so that the elastic portion 41 is reset to a position separated from the static contact 5. The elastic portion 41 can be connected to the driving member 6 so that the elastic portion 41 is separated from the static contact member 5 under the drive of the driving member 6. The elasticity of the elastic portion 41 itself can also be utilized, or a spring can be provided to drive the elastic portion 41 to return to a position separated from the static contact member 5, all of which fall within the scope of protection of the present invention.

[0047] Furthermore, sliding holes serving as chute 60 are provided on the side walls of the housing of the circuit breaker pole and the housing of the leakage protection pole 1, which are in close contact with each other. The driving member 6 is slidably disposed in the chute 60. Driven by the operating mechanism 25, the driving member 6 moves linearly along the length of the chute 60. By providing the sliding holes serving as chute 60 on the adjacent housing side walls of the circuit breaker pole and the leakage protection pole 1, the thickness of the driving member 6 is substantially equal to the thickness of the adjacent housing side walls of the circuit breaker pole and the leakage protection pole 1. This allows the driving member 6 to occupy little or no internal space of the leakage protection pole 1, eliminating the need to significantly alter the existing internal structure of the leakage protection pole 1.

[0048] Furthermore, a linkage hole 601 is provided on one side of the slide groove 60. The linkage hole 601 is used to pass the trip shaft (not shown in the figure). One end of the trip shaft is connected to the operating mechanism 25 of the circuit breaker pole. When the leakage release 3 is actuated, it pushes the other end of the trip shaft, so that the trip shaft drives the operating mechanism 25 to trip. The linkage hole 601 is connected to the sliding hole.

[0049] like Figure 7-8 As shown, the lock catch 253 includes a rotating portion 256 and a locking portion 257 on one side of the rotating portion 256. The rotating portion 256 is rotatably mounted on the rotating plate 251 via a lock catch rotating shaft 255. The locking portion 257 is used to lock the trip catch 252. The driving member 6 is provided with a driving hole 61 sleeved on the lock catch rotating shaft 255. When the lock catch 253 rotates with the rotating plate 251, the driving member 6 is driven to move via the lock catch rotating shaft 255. In this embodiment, the lock catch rotating shaft 255 is used as a driving portion to drive the driving member 6 to move. Of course, the driving portion can be set at other positions of the operating mechanism 25, such as other positions of the rotating plate 251 and the lock catch 253, which all fall within the scope of protection of the present invention.

[0050] Furthermore, the driving member 6 includes a driving rod 62 and a first boss 63 and a second boss 64, respectively, disposed at either end of the driving rod 62. The first boss 63 and the second boss 64 are disposed on opposite sides of the driving rod 62, close to and away from the circuit breaker pole. The first boss 63 is configured to be inserted into the circuit breaker pole. The first boss 63 is provided with a driving hole 61. The second boss 64 protrudes along the width of the housing and extends to the side of the movable contact 4. The second boss 64 is provided with a pushing surface 65, which is disposed at an oblique angle to the direction of movement of the driving member 6. The elastic portion 41 is disposed parallel to the pushing surface 65 on the driving member when not in contact with the static contact 5. The parallel arrangement of the pushing surface 65 and the elastic portion 41 facilitates the driving member's pushing of the movable contact 4, allowing for smoother engagement and preventing problems such as jamming.

[0051] The second boss 64 includes a first boss 641 and a second boss 642 connected between the first boss 641 and the driving rod 62. The width of the first boss 641 is smaller than the width of the second boss 642. The pushing surface 65 is arranged on the first boss 641. After the first boss 641 is reduced in size, it can avoid interference with other parts.

[0052] like Figure 1-3 As shown, the leakage protection electrode 1 of this embodiment includes a shell composed of a first side plate 11 and a second side plate 12, and a first partition 13 and a second partition 14 arranged between the first side plate 11 and the second side plate 12. The side of the first side plate 11 away from the second side plate 12 is provided with a circuit breaker pole shell of the circuit breaker pole 2. The first side plate 11 is located between the second side plate 12 and the circuit breaker pole 2, and the first partition 13 is located between the second partition 14 and the first side plate 11. The electronic component board, the zero-sequence current transformer and the leakage release 3 are respectively arranged on the first side plate 11, and are located on the first side plate 11 and the second side plate 11. 2, the dynamic contact 4, static contact 5 and drive 6 are respectively arranged on the first side plate 11, and the leakage release 3 is located between the first side plate 11 and the second partition 14. The first partition 13 and the second partition 14 are provided with slots in the portions corresponding to the electronic component board and the zero-sequence current transformer. The provision of the first partition 13 and the second partition 14 allows for universal material. This embodiment is a 4P circuit breaker product. If a 3P circuit breaker product is used, one partition, such as the first partition 13 or the second partition 14, can be removed. If a 2P circuit breaker product is used, the first partition 13 and the second partition 14 can be removed. The first side plate 11 can be independent of the circuit breaker pole housing, or it can be integrally formed with the circuit breaker pole housing and be part of the circuit breaker pole housing.

[0053] like Figure 3As shown, the static contact 5 is fixedly provided on the first side plate 11, and the static contact 5 is connected to the first wire (not shown in the figure), and the dynamic contact 4 is connected to the second wire 72. The second wire 72 is used to connect one end of the leakage tripping coil, and the other end of the electric tripping coil is connected to the third wire (not shown in the figure). The first wire and the third wire are respectively connected to the two ends of the switching element on the electronic component board.

[0054] like Figure 4 As shown, the leakage circuit breaker 3 is positioned above the electronic component board and the zero-sequence current transformer. A test button and an indicator mechanism are provided on opposite sides of the housing along the length of the leakage circuit breaker 3. The indicator mechanism indicates the status of the leakage circuit breaker 3, i.e., whether a leakage fault has occurred. The test button closes a test circuit to simulate a leakage current signal to test whether it is functioning properly. The first side plate 11 of the leakage protection pole 1 and the side plate of the circuit breaker pole 2 housing that closely contacts the first side plate 11 are provided with the slide groove 60. The driver 6 is disposed within the slide groove 60. The driver 6 and the indicator mechanism are stacked in the thickness direction of the leakage protection pole 1 housing. The dynamic contact 4 and the static contact 5 are disposed below the indicator mechanism.

[0055] like Figure 3-4As shown, the indicator mechanism 8 includes an indicator button 81, a push plate 82, and an indicator spring (not shown). The indicator button 81 is slidably mounted, and the push plate 82 is rotatably mounted and capable of locking the indicator button 81. The indicator spring is connected to the indicator button 81. When the leakage release 3 is activated, the push plate 82 drives the trip shaft, causing the operating mechanism of the circuit breaker pole 2 to trip. The push plate 82 releases the lock on the indicator button 81, and the indicator spring drives the indicator button 81 out of the housing of the leakage protection pole 1, indicating a leakage fault. The trip shaft extends into the leakage protection pole 1 through the linkage hole 601. The end of the driving member 6 for connecting to the operating mechanism 25 is located between the push plate 82 and the first side plate 11, so that the slide 60 is adjacent to and connected to the linkage hole 601. The end of the driving member 6 for pushing the movable contact 4 is located on the side below the push plate 82. By locating the end of the driver 6 used to connect to the operating mechanism 25 between the push plate 82 and the first side plate 11, not only can the space utilization within the housing be improved and the volume be avoided, but the driver 6 can also be positioned on one side of the trip shaft, allowing the slide slot 60 to be adjacent to and in communication with the linkage hole 601, thus avoiding major modifications to the overall structure of the circuit breaker housing and reducing manufacturing costs. Specifically, the indicator button 81 includes an indicator portion 811 and a limit portion 812. Pressing the indicator portion 811 causes the indicator button 81 to compress the indicator spring and move it back into the housing to a first indicator position. Simultaneously, the push plate 82 locks the limit portion 812, locking the indicator button 81 in the first indicator position. The residual current release 3 pushes the push plate 82 to drive the trip shaft, tripping the operating mechanism of the circuit breaker pole 2. Simultaneously, the residual current release 3 drives the push plate 82 to unlock the limit portion 812, and the indicator spring drives the indicator button 81 to move, causing the indicator portion 811 to move out of the housing to a second indicator position.

[0056] like Figure 4 As shown, the dynamic contact 4 and the static contact 5 are both arranged below the indicating mechanism 8, the dynamic contact 4 includes an L-shaped fixing portion 42, and an elastic portion 41 connected to the fixing portion 42, the elastic portion 41 is inclined close to the side of the static contact 5, and the shell of the leakage protection electrode 1 is provided with a first limiting groove 101 for limiting the fixing portion 42, and a second limiting groove 102 for limiting the static contact 5, the first limiting groove 101 and the second limiting groove 102 are respectively provided with a first wiring port 1011 and a second wiring port 1021 on sides away from each other, the first wiring port 1011 and the second wiring port 1021 are respectively used to pass the second wire 72 and the first wire, so that the second wire 72 and the first wire are connected to the dynamic contact 4 and the static contact 5, respectively.

[0057] like Figure 9The circuit schematic diagram shown shows at least one set of leakage current power supply contacts. In this embodiment, two sets of leakage current power supply contacts are provided. Any two sets of power phase lines from the A-phase line, the B-phase line, and the C-phase line are connected to the dynamic contact pieces 4 of the two sets of leakage current power supply contacts. The static contact pieces 5 of the two sets of leakage current power supply contacts are respectively connected to the electronic component board for powering the electronic component board. When three sets of leakage current power supply contacts are provided, the A-phase line, the B-phase line, and the C-phase line are respectively connected to the dynamic contact pieces 4 of the three sets of leakage current power supply contacts. The static contact pieces 5 of the three sets of leakage current power supply contacts are respectively connected to the electronic component board for powering the electronic component board. Of course, one set of the leakage current power supply contacts can also be provided, and all of these fall within the scope of protection of the present invention.

[0058] As another embodiment, the dynamic contact 4 is provided on the driving member 6 , and the static contact 5 is fixedly provided in the leakage protection electrode 1 . The driving member 6 drives the dynamic contact 4 and the static contact 5 to separate under the driving of the operating mechanism 25 .

[0059] It should be noted that in the description of the present invention, the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not indicate that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," etc., are used solely to distinguish descriptions and should not be construed as indicating relative importance.

[0060] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art to which the present invention belongs, simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the scope of protection of the present invention.

Claims

1. A leakage protection circuit breaker, comprising a leakage protection pole (1) and at least one circuit breaker pole (2) arranged side by side, wherein the leakage protection pole (1) comprises a zero-sequence current transformer, an electronic component board and a leakage release (3), the circuit breaker pole (2) comprises a handle (26), an operating mechanism (25) and a main circuit, the handle (26) drives the main circuit to be turned on and off through the operating mechanism (25), the leakage release (3) comprises a leakage trip coil and a leakage trip iron core (33) driven by the leakage trip coil, characterized in that: The leakage protection pole (1) is provided with a leakage power supply contact consisting of a dynamic contact piece (4) and a static contact piece (5), and a driving piece (6) for driving the dynamic contact piece (4) and the static contact piece (5) to contact and separate. The leakage power supply contact consisting of the dynamic contact piece (4) and the static contact piece (5) is connected in series in a power supply circuit for supplying power to an electronic component board and / or a leakage release (3). The driving piece (6) is linked to an operating mechanism (25) of the circuit breaker pole (2). When the main circuit of the circuit breaker pole (2) is turned on, the driving member (6) drives the moving contact member (4) to contact the static contact member (5) under the driving of the operating mechanism (25), thereby connecting the power supply circuit; When the main circuit of the circuit breaker pole (2) is disconnected, the driving member (6) drives the moving contact member (4) and the static contact member (5) to separate under the driving of the operating mechanism (25), or the driving member (6) moves away from the moving contact member (4) under the driving of the operating mechanism (25), and the moving contact member (4) is reset to a position separated from the static contact member (5), thereby disconnecting the power supply circuit.

2. The leakage protection circuit breaker according to claim 1, characterized in that: A slide groove (60) is provided on the housing of the circuit breaker pole and / or the housing of the leakage protection pole (1), and the driving member (6) is slidably arranged in the slide groove (60). The driving member (6) moves linearly along the length direction of the slide groove (60) under the drive of the operating mechanism (25).

3. The leakage protection circuit breaker according to claim 1, characterized in that: The housing of the circuit breaker pole and the housing of the leakage protection pole (1) are both provided with sliding holes as sliding grooves (60) on the side walls that are in close contact with each other. The driving member (6) is slidably arranged in the sliding grooves (60). The driving member (6) moves linearly along the length direction of the sliding grooves (60) under the drive of the operating mechanism (25).

4. The leakage protection circuit breaker according to claim 2 or 3, characterized in that: The movable contact (4) includes an elastic portion (41) arranged in the moving direction of the driving member (6); when the circuit breaker pole is closed, the operating mechanism (25) drives the driving member (6) to move along the sliding groove (60) and pushes the elastic portion (41), so that the elastic portion (41) contacts the static contact (5); when the circuit breaker pole (2) is opened, or when the operating mechanism (25) is tripped due to a fault, the operating mechanism (25) drives the driving member (6) to move along the sliding groove (60) and away from the elastic portion (41).

5. The leakage protection circuit breaker according to claim 3, characterized in that: A linkage hole (601) is provided on one side of the slide groove (60), and the linkage hole (601) is used to pass a tripping shaft. One end of the tripping shaft is connected to the operating mechanism (25) of the circuit breaker pole (2). When the leakage release (3) is in operation, it pushes the other end of the tripping shaft, so that the tripping shaft drives the operating mechanism (25) to trip. The linkage hole (601) is connected to the sliding hole.

6. The leakage protection circuit breaker according to claim 1, characterized in that: The operating mechanism (25) includes a rotating plate (251) and a trip button (252) and a lock button (253) respectively rotatably arranged on the rotating plate (251). The trip button (252) is connected to the handle (26) through a connecting rod (254). The lock button (253) is used to lock the trip button (252) with the rotating plate (251), so that the handle (26) can drive the contact (21) to support rotation through the trip button (252). The main circuit includes a moving contact (21) and a static contact (22). The moving contact (21) is arranged on the rotating plate (251). When the rotating plate (251) rotates, it drives the moving contact (21) and the static contact (22) to contact and separate, so as to respectively connect and disconnect the main circuit.

7. The leakage protection circuit breaker according to claim 6, characterized in that: The lock catch (253) comprises a rotating portion (256) and a locking portion (257) on one side of the rotating portion (256); the rotating portion (256) is rotatably mounted on the rotating plate (251) via a lock catch rotating shaft (255); the locking portion (257) is used to lock the jump catch (252); the driving member (6) is provided with a driving hole (61) sleeved on the lock catch rotating shaft (255); when the lock catch (253) rotates with the rotating plate (251), the driving member (6) is driven to move via the lock catch rotating shaft (255).

8. The leakage protection circuit breaker according to claim 1, characterized in that: The driving member (6) includes a driving rod (62) and a first boss (63) and a second boss (64) respectively arranged at both ends of the driving rod (62). The first boss (63) and the second boss (64) are relatively arranged on both sides of the driving rod (62) close to and away from the circuit breaker pole (2). The first boss (63) is used to be inserted into the circuit breaker pole (2). A driving hole (61) is provided on the first boss (63). The second boss (64) protrudes along the width direction of the shell and extends to the side of the movable contact member (4).

9. The leakage protection circuit breaker according to claim 8, characterized in that: The second boss (64) is provided with a pushing surface (65), which is arranged at an oblique angle to the moving direction of the driving member (6). The dynamic contact member (4) includes an elastic portion (41) arranged in the moving direction of the driving member (6), and the elastic portion (41) is arranged parallel to the pushing surface (65) on the driving member when it is not in contact with the static contact member (5).

10. The leakage protection circuit breaker according to claim 9, characterized in that: The second boss (64) includes a first boss (641) and a second boss (642) connected between the first boss (641) and the driving rod (62), the width of the first boss (641) is smaller than the width of the second boss (642), and the pushing surface (65) is arranged on the first boss (641).

11. The leakage protection circuit breaker according to claim 4, characterized in that: The movable contact (4) comprises a fixed portion (42) and an elastic portion (41) connected to the fixed portion (42); the fixed portion (42) is fixedly arranged and connected to the power supply circuit; the housing of the leakage protection electrode (1) is provided with a first limiting groove (101) for limiting the fixed portion (42) and a second limiting groove (102) for limiting the static contact (5); the elastic portion (41) is inclined on a side close to the static contact (5); the driving member (6) is located on a side of the elastic portion (41) away from the static contact (5); the driving member (6) is used to push the elastic portion (41) of the movable contact (4) to bend toward the static contact (5) and to contact the static contact (5).

12. The leakage protection circuit breaker according to claim 11, characterized in that: The static contact (5) is connected to a first wire, and the dynamic contact (4) is connected to a second wire (72). The second wire (72) is used to connect one end of a leakage tripping coil, and the other end of the electric tripping coil is connected to a third wire. The first wire and the third wire are respectively connected to an electronic component board. The first limiting groove (101) and the second limiting groove (102) are respectively provided with a first wiring port (1011) and a second wiring port (1021) on mutually distant sides. The first wiring port (1011) and the second wiring port (1021) are respectively used to pass through the second wire (72) and the first wire, so that the second wire (72) and the first wire are respectively connected to the dynamic contact (4) and the static contact (5).

13. The leakage protection circuit breaker according to claim 5, characterized in that: The leakage protection pole (1) further comprises an indication mechanism (8) cooperating with the leakage release (3), the indication mechanism (8) comprising an indication button (81), a push plate (82) and an indication spring, the indication button (81) being slidably arranged, the indication spring being connected to the indication button (81), the indication button (81) comprising an indication portion (811) and a limiting portion (812), and pressing the indication portion (811) enables the indication button (81) to compress the indication spring and move it in a direction of retracting the housing to a first indication position, while the push plate (82) locks the limiting portion (812) and locks the indication button (81) in the first indication position; when the leakage release (3) is actuated, the push plate (82) is pushed to drive the tripping shaft, so that the operating mechanism of the circuit breaker pole (2) is tripped, and at the same time, the push plate (82) unlocks the limiting portion (812), and the indication spring drives the indication button (81) to move, so that the indication portion (811) moves in a direction extending outside the housing to a second indication position.

14. The leakage protection circuit breaker according to claim 13, characterized in that: The leakage protection electrode (1) further comprises a test button and a test circuit, wherein the test button is used to close the test circuit to simulate a leakage current signal, and the test button and the indicating mechanism are respectively arranged on opposite sides of the leakage release (3) along the length direction of the housing of the leakage protection electrode (1).

15. The leakage protection circuit breaker according to claim 13, characterized in that: The dynamic contact piece (4) is arranged on the driving piece (6), and the static contact piece (5) is fixedly arranged in the leakage protection electrode (1).

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