Leakage protection circuit breaker

Abstract

An electric leakage protection circuit breaker comprises an electric leakage protection electrode and at least one circuit breaker electrode which are arranged side by side, the electric leakage protection electrode comprises a zero sequence current transformer, an electronic assembly board and an electric leakage release, 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. The driving piece is used for driving the movable contact piece to be in contact with or separated from the static contact piece, 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, and the driving piece is linked with a handle of the circuit breaker pole. When the main loop of the circuit breaker pole is disconnected, the driving piece is driven by the handle to drive the movable contact piece to be in contact with the static contact piece, and when the main loop of the circuit breaker pole is disconnected, the driving piece is driven by the handle to drive the movable contact piece to be separated from the static contact piece. And the leakage trip coil and the electronic component board are not burnt.

Description

Technical Field

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

[0002] Low-voltage circuit breakers are often used to distribute electrical energy and protect lines and power equipment in the event of overload and short circuit. They can also be used for infrequent line switching and infrequent motor starting.

[0003] Especially for electronic residual current circuit breakers, since the electronic component board usually draws power from the output terminal of the residual current circuit breaker, it is stipulated that the residual current circuit breaker can only be connected to the power supply at the input terminal and the load at the output terminal. However, if the user mistakenly connects the power supply to the input terminal of the residual current circuit breaker during use, that is, the residual current circuit breaker is reversely connected, the electronic component board will always be in the power-on state. Although the residual current release can still operate when there is leakage current in the main circuit or when the test button is pressed, this can easily cause the release coil to burn out, causing the residual current protection function to fail.

[0004] When the load is a high inductive or high capacitive load, if the main circuit power supply is suddenly disconnected, or the circuit breaker is disconnected, the high inductive or high capacitive load will generate a reverse electromotive force. If the electronic component board of the electronic leakage circuit breaker draws power through the outlet terminal, that is, the leakage circuit breaker is positively connected, the reverse electromotive force generated by the load will be directly added 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 added to the electronic component board will be directly added to both ends of the leakage release coil, causing the coil to burn and causing the leakage function to fail. Utility Model Content

[0005] The purpose of the utility model is to overcome at least one defect of the prior art and provide a leakage protection circuit breaker.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A leakage protection circuit breaker comprises a leakage protection pole and at least one circuit breaker pole arranged side by side, wherein the leakage protection pole comprises a zero-sequence current transformer, an electronic component board and a leakage release, the circuit breaker pole comprises 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 comprises a leakage release coil and a leakage release iron core driven by the leakage release coil,

[0008] The leakage protection pole is provided with a leakage power supply contact composed of a moving contact and a static contact, and a driving member used to drive the moving contact to contact and separate from the static contact. The leakage power supply contact composed of the moving contact and the static contact is connected in series in a power supply circuit for supplying power to the electronic component board and / or the leakage releaser. The driving member is linked to the handle of the circuit breaker pole. When the main circuit of the circuit breaker pole is turned on, the driving member is driven by the handle to drive the moving contact to contact with the static contact. When the main circuit of the circuit breaker pole is disconnected, the driving member is driven by the handle to drive the moving contact to separate from the static contact.

[0009] Preferably, the driving member is rotatably arranged, and the dynamic contact member is fixedly arranged on the driving member.

[0010] Preferably, the driving member includes a driving plate and a driving shaft connected between the driving plate and the handle of the circuit breaker pole, the driving plate is located in the shell of the leakage protection pole, and the handle of the circuit breaker pole drives the driving plate to rotate with the driving shaft as the rotation center through the driving shaft.

[0011] Preferably, the driving member is provided with a first handle extending outside the shell of the leakage protection pole, and one end of the first handle extending outside the shell is linked to the handle of the circuit breaker pole.

[0012] Preferably, the moving contact is fixedly arranged on the driving plate, the driving shaft comprises a coaxially arranged pivot portion and a driving portion, the handle of the circuit breaker pole is provided with a driving hole for inserting the pivot portion, and the cross-sectional shape of the pivot portion is the same as the cross-sectional shape of the driving hole.

[0013] Preferably, the driving plate is provided with a fixing groove, the moving contact piece includes a fixing part inserted into the fixing groove for limiting engagement, and a swinging part located at an eccentric position of the driving piece, the static contact piece is located on the side of the swinging part, and the moving contact piece drives the swinging part to contact and separate from the static contact piece when the driving plate rotates.

[0014] Preferably, the movable contact comprises a swinging portion and a connecting portion which are arranged opposite to each other, and a fixing portion connected between the swinging portion and the connecting portion, and the connecting portion is connected to the power supply circuit via a second wire.

[0015] Preferably, the moving contact is a spring or a spring, one end of which is fixedly connected to the power supply circuit, and the other end of which is arranged between the driving member and the static contact, and the driving member is used to push the moving contact to bend toward the static contact and contact with the static contact.

[0016] Preferably, the shell includes a leakage protection pole composed of a first side plate and a second side plate, and a second partition plate arranged between the first side plate and the second side plate, the first side plate is located between the second side plate and the circuit breaker pole, the moving contact, the static contact and the driving member are located between the second partition plate and the second side plate, the leakage release is located between the first side plate and the second partition plate, the electronic component board and the leakage release are located between the first side plate and the second side plate, and the second partition plate and the part corresponding to the electronic component board and the zero-sequence current transformer are provided with a slot.

[0017] Preferably, the leakage release, the moving contact, the static contact and the driving element are all arranged above the electronic component board and the zero-sequence current transformer.

[0018] Preferably, the leakage release is arranged on one side of the second partition, and the moving contact, the static contact and the driving member are arranged on the other side of the second partition relatively.

[0019] Preferably, the static contact is in the shape of a flat plate, the second partition is provided with a mounting groove for inserting the static contact, one end of the static contact is inserted into the mounting groove for limit fit, and the other end is connected to the power supply circuit and used to contact the dynamic contact.

[0020] Preferably, the driving member includes a driving plate, and a driving shaft connected between the driving plate and the handle of the circuit breaker pole, the driving shaft includes a coaxially arranged pivot portion and a driving portion, the second partition plate is provided with a mounting boss, a pivot hole is provided in the mounting boss, one end of the pivot portion of the driving member connected to the driving portion is rotatably arranged in the pivot hole, one end of the pivot portion away from the driving portion is located outside the pivot hole and connected to the driving plate, the driving plate is located on one side of the radial direction of the pivot portion, and when the pivot portion rotates with the handle of the circuit breaker pole, the pivot portion drives the driving plate to rotate.

[0021] Preferably, the static contact is connected to a first wire, the dynamic contact is connected to a second wire, the second wire is used to connect one end of a leakage trip coil, the other end of the leakage trip coil is connected to a third wire, and the first wire and the third wire are respectively connected to the electronic component board.

[0022] Preferably, it includes two groups of the leakage power supply contacts, the moving contacts of the two groups of leakage power supply contacts are respectively arranged on the driving part, and any two groups of power phase lines are connected to the moving contacts of the two groups of leakage power supply contacts, and the static contacts of the two groups of leakage power supply contacts are respectively connected to the electronic component board for powering the electronic component board.

[0023] Preferably, three groups of the leakage power supply contacts are included, the moving contacts of the three groups of leakage power supply contacts are respectively arranged on the driving parts, the three groups of power phase lines are respectively connected to the moving contacts of the three groups of leakage power supply contacts, and the static contacts of the three groups of leakage power supply contacts are respectively connected to the electronic component board for powering the electronic component board.

[0024] The leakage protection circuit breaker of the utility model forms a leakage power supply contact through a moving contact piece and a static contact piece, and the driving piece is linked with the handle, and the electronic component board and / or the leakage release are controlled to draw power from the power supply through the leakage power supply contact. When the handle drives the leakage protection circuit breaker to close, it also drives the leakage power supply contact to close to supply power to the electronic component board and / or the leakage release. When the leakage protection circuit breaker is opened, the handle drives the leakage power supply contact to disconnect at the same time, and the current cannot pass through the electronic component board and / or the leakage release. Even if the incoming and outgoing terminals of the circuit breaker pole are mistakenly connected in reverse during wiring, or when a high 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 arranging the moving contact, the static contact and the driving member on the second partition above the electronic component board and the zero-sequence current transformer, the space in the shell can be effectively utilized, and the layout is reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the leakage protection circuit breaker of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the leakage protection electrode of the utility model;

[0028] Figure 3 It is an exploded diagram of the leakage protection electrode of the utility model;

[0029] Figure 4 It is a structural schematic diagram of the leakage protection electrode of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the utility model in which the leakage protection electrode is hidden behind the second partition;

[0031] Figure 6 It is a schematic diagram of the cooperation between the driving member and the circuit breaker pole of the utility model;

[0032] Figure 7 It is a structural schematic diagram of the driving member of the utility model;

[0033] Figure 8 It is a structural schematic diagram of the handle of the utility model;

[0034] Fig. 9 This is a circuit schematic diagram when the leakage power supply contact of the utility model controls the power supply of the electronic component board;

[0035] In the figure, leakage protection pole 1; circuit breaker pole 2; leakage release 3; zero-sequence current transformer 31; electronic component board 32; leakage release iron core 33; moving contact 4; static contact 5; driving member 6; handle 21; first side plate 11; second side plate 12; first partition 13; second partition 14; first wire 71; second wire 72; third wire 73; driving plate 61; pivot portion 62; driving portion 63; driving hole 22; mounting boss 15; fixing groove 64; fixing portion 41; swinging portion 42; connecting portion 43; mounting groove 16. 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 of the present utility model. The leakage protection circuit breaker of the present utility model is not limited to the description of the following embodiments.

[0037] like Figure 1-2 As 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 (not shown in the figure) consisting of an incoming line terminal, an outgoing line terminal, a moving contact, a stationary contact, an overload tripping mechanism and a short-circuit tripping mechanism, and an operating mechanism for driving the moving contact to contact and separate from the stationary contact. The incoming line terminal and the outgoing line terminal are used to connect the power supply and the load respectively. The moving contact and the stationary contact are respectively connected to the incoming line terminal. The inlet terminal and the outlet terminal are connected, the overload release mechanism and the short-circuit release mechanism are connected in series in the main circuit, and the handle 21 drives the moving contact and the static contact to contact or separate through the operating mechanism to realize the main circuit of the circuit breaker pole 2 to be turned on and off; when the circuit breaker pole 2 is an N pole, it usually only includes the inlet terminal, the outlet terminal, the moving contact and the static contact, and the operating mechanism for driving the moving contact and the static contact to contact and separate, and the overload release mechanism and the short-circuit release mechanism are not set; of course, the circuit breaker pole 2 of the N pole can also be not set, and only the circuit breaker pole 2 of the phase pole can be set. The leakage protection pole 1 includes a zero-sequence current transformer 31, an electronic component board 32 and a leakage release 3. The zero-sequence current transformer 31 is electrically connected to the electronic component board 32, and the electronic component board 32 is electrically connected to the leakage release 3. The main circuits of the four circuit breaker poles 2 pass through the zero-sequence current transformer 31 respectively. The zero-sequence current transformer 31 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 32. 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 to trip. The tripping operating mechanism drives the moving contact and the static contact to separate, disconnecting the main circuit to achieve the protection function.

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

[0039] When the leakage current, short-circuit current and overload current meet the conditions respectively, the leakage release 3, overload release mechanism and short-circuit release mechanism can trigger the lock to unlock and trip, that is, drive the operating mechanism to trip. At this time, when the handle 21 rotates, it cannot drive the contact support to rotate through the trip, and the handle 21 loses the lock on the contact support, and the energy storage spring is released. When the energy storage spring is released, it drives the contact support to rotate, so that the moving contact is separated from the static contact, and the leakage protection, short-circuit protection and overload protection functions are realized.

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

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

[0042] An improvement of this embodiment is that Figure 5 As shown, the leakage protection pole 1 is provided with a leakage power supply contact composed of a moving contact 4 and a static contact 5, and a driving member 6 for driving the moving contact 4 to contact and separate from the static contact 5. The leakage power supply contact composed of the moving contact 4 and the static contact 5 is connected in series in a power supply circuit for supplying power to the electronic component board 32 and / or the leakage release 3. The driving member 6 is linked with the handle 21 of the circuit breaker pole. When the main circuit of the circuit breaker pole 2 is turned on, the driving member 6 is driven by the handle 21 to drive the moving contact 4 to contact with the static contact 5. When the main circuit of the circuit breaker pole 2 is disconnected, the driving member 6 is driven by the handle 21 to drive the moving contact 4 to separate from the static contact 5, thereby disconnecting the power supply circuit for supplying power to the electronic component board 32 and / or the leakage release 3.

[0043] The leakage protection circuit breaker of this embodiment forms a leakage power supply contact through the moving contact piece 4 and the static contact piece 5, and the driving piece is linked with the handle 21, and the electronic component board 32 and / or the leakage release 3 are controlled to draw power from the power supply through the leakage power supply contact. When the handle 21 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 32 and / or the leakage release 3. When the leakage protection circuit breaker is opened, the handle 21 also drives the leakage power supply contact to disconnect, and the current cannot pass through the electronic component board 32 and / or the leakage release 3. Even if the incoming and outgoing terminals of the circuit breaker pole 2 are mistakenly connected in reverse during wiring, or when a high inductive or capacitive load is connected, the leakage release coil of the leakage release 3 and the electronic component board 32 will not be burned, which can greatly improve 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 32 is provided with a switch element and a leakage detection circuit. The switch element is connected in series in the circuit for supplying power to the leakage release 3 and takes power from the power supply. The leakage detection circuit can control the switch 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 switch element can be an electronic switch such as a relay or a MOS tube. An embodiment of the leakage power supply contact connected to the power supply circuit is that the electronic component board 32 takes power from the power supply through the leakage power supply contact, and the circuit for supplying power to the electronic component board 32 is used as the power supply circuit, and the leakage power supply contact is only used to control the power supply circuit for supplying power to the electronic component board 32; or, the leakage release coil, the switch element and the leakage power supply contact are connected in series to take power from the power supply as the power supply circuit, and the leakage power supply contact is used to control the power supply circuit for supplying 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 32 and the leakage trip coil at the same time.

[0045] When the handle 21 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 32 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 release coil attracts the leakage release iron core 33 to operate. When the leakage release iron core 33 operates, it triggers the lock of the circuit breaker pole 2 to unlock and trip, and drives the moving contact and the static contact to separate through the operating mechanism and disconnect the main circuit of the circuit breaker pole 2. When the moving contact and the static contact of the circuit breaker pole are separated, the handle 21 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 32 and / or the leakage release coil.

[0046] like Figure 3As shown, the leakage protection pole 1 of this embodiment includes a shell composed of a first side plate 11 and a second side plate 12, and a first partition plate 13 and a second partition plate 14 arranged between the first side plate 11 and the second side plate 12. A circuit breaker pole shell of the circuit breaker pole 2 is provided on the side of the first side plate 11 away from the second side plate 12. The first side plate 11 is located between the second side plate 12 and the circuit breaker pole 2, and the first partition plate 13 is located between the second partition plate 14 and the first side plate 11. The electronic component board 32, the zero-sequence current transformer 31 and the leakage release 3 are respectively arranged on the first side plate 11, and the positions Between the first side plate 11 and the second side plate 12, the moving contact 4, the static contact 5 and the driving member 6 are respectively arranged on the second partition 14 and located between the second partition 14 and the second side plate 12, 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 and the electronic component board 32 and the zero-sequence current transformer 31 are provided with slots, the leakage power supply contact is installed through the first partition 13, and the leakage power supply contact is isolated from the leakage release 3, which can effectively utilize the space and has the characteristics of reasonable layout. In addition, the first partition 13 and the second partition 14 are arranged to allow the materials to be universal. This embodiment is a 4P circuit breaker product. If a 3P circuit breaker product is used, one partition can be removed, such as the first partition 13 or the second partition 14, and a 2P circuit breaker product can remove the first partition 13 and the second partition 14. The first side plate 11 may be independent of the circuit breaker pole housing, or may be integrally formed with the circuit breaker pole housing and be a part of the circuit breaker pole housing.

[0047] like Figure 4 As shown, the static contact 5 is fixedly arranged on the second partition 14, the static contact 5 is connected to the first wire 71, 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 leakage tripping coil is connected to the third wire 73, the first wire 71 and the third wire 73 are respectively connected to the two ends of the switch element on the electronic component board 32.

[0048] like Figure 5 As shown, Figure 5 Hidden Figure 3The second partition 14 in the housing, the leakage release 3, the moving contact 4, the static contact 5 and the driving member 6 are all arranged above the electronic component board 32 and the zero-sequence current transformer 31, the leakage release 3 is arranged on one side of the second partition 14, the moving contact 4, the static contact 5 and the driving member 6 are relatively arranged on the other side of the second partition 14, the second partition 14 separates the leakage release 3 from the moving contact 4, the static contact 5 and the driving member 6, and the leakage release 3 is provided with a test button and an indication button on opposite sides along the length direction of the housing, the indication button is used to indicate the state of the leakage release 3, that is, to indicate whether a leakage fault occurs, and the test button is used to close the test loop to simulate the leakage current signal to test whether it can operate normally. By arranging the moving contact 4, the static contact 5 and the driving member 6 on the second partition above the electronic component board 32 and the zero-sequence current transformer 31, the space in the housing can be effectively utilized, and the layout is reasonable.

[0049] like Figure 6-8 As shown, the driving member 6 is rotatably arranged, the moving contact 4 is fixedly arranged on the driving member 6, and the handle 21 of the circuit breaker pole 2 drives the moving contact 4 to rotate through the driving member 6. It can be understood that the moving contact 4 may not be arranged on the driving member 6, and the moving contact 4 may be a spring or a spring or other elastic conductor, one end of the moving contact 4 is fixedly arranged to be connected to the power supply circuit, for example, connected to one end of the leakage tripping coil through the second wire 72, and the other end of the moving contact 4 is arranged between the driving member 6 and the static contact 5, the driving member 6 is used to push the moving contact 4 to bend toward the static contact 5 and contact with the static contact 5, and the moving contact 4 is reset under its own elastic action after the driving member 6 is reset, which all belong to the protection scope of the utility model.

[0050] Further, if Figure 7As shown, the driving member 6 includes a driving plate 61 and a driving shaft connected between the driving plate 61 and the handle 21 of the circuit breaker pole 2. The driving plate 61 is located in the shell of the leakage protection pole 1. The handle 21 of the circuit breaker pole 2 drives the driving plate 61 to rotate with the driving shaft as the rotation center through the driving shaft. The moving contact 4 is fixedly arranged on the driving plate 61, the driving shaft includes a coaxially arranged pivoting portion 62 and a driving portion 63, the handle 21 of the circuit breaker pole 2 is provided with a square driving hole 22 for inserting the pivoting portion 62, the cross-sectional shape of the pivoting portion 62 is a square shape having the same cross-sectional shape as the driving hole 22, the second partition 14 is provided with a mounting boss 15, the mounting boss 15 is provided with a pivot hole for passing the pivoting portion 62, one end of the pivoting portion 62 connected to the driving portion 63 is rotatably arranged in the pivot hole, one end of the pivoting portion 62 away from the driving portion 63 is located outside the pivot hole and connected to the driving plate 61, the driving plate 61 is located on one side of the radial direction of the pivoting portion 62, when the pivoting portion 62 rotates with the handle 21 of the circuit breaker pole 2, the pivoting portion 62 drives the driving plate 61 to rotate. The driving member 6 is located in the housing and is invisible to the user.

[0051] In this embodiment, the leakage release 3 of the leakage protection pole 1 directly triggers the lock unlocking and tripping of the circuit breaker pole 2. An energy storage mechanism and a corresponding handle 21 can also be provided, so that the leakage release 3 triggers the lock unlocking and tripping of the circuit breaker pole 2 through the energy storage mechanism. At the same time, the handle 21 of the leakage protection pole 1 is linked with the handle 21 of the circuit breaker pole 2, and the driving member 6 can rotate with the handle 21 of the leakage protection pole 1. Of course, the driving part 63 and the driving hole 22 can also adopt a notched circular or other shape, and the driving plate 61 is also arranged on the axis of the pivot shaft, and the pivot shaft is connected to the side of the driving plate 61. In addition, the driving member 6 can also adopt other forms, such as providing a first handle similar to the handle 21 of the circuit breaker pole 2, one end of the first handle extends outside the housing and is linked with the handle 21 of the circuit breaker pole 2, and the handle 21 of the circuit breaker pole 2 drives the driving member 6 to rotate through the first handle, which all belong to the protection scope of the utility model.

[0052] Furthermore, the driving plate 61 is provided with a fixing groove 64, the moving contact 4 includes a fixing portion 41 inserted into the fixing groove 64 for limiting engagement, and a swinging portion 42 located at an eccentric position of the driving member 6, and the static contact 5 is located on the side of the swinging portion 42. When the moving contact 4 rotates with the driving plate 61, it drives the swinging portion 42 to contact and separate from the static contact 5.

[0053] Specifically, the movable contact 4 is U-shaped, and includes a swinging portion 42 and a connecting portion 43 that are arranged opposite to each other, and a fixed portion 41 connected between the swinging portion 42 and the connecting portion 43. The connecting portion 43 is located outside the fixing groove 64 and is connected to the power supply circuit through the second wire 72. For example, the connecting portion 43 is connected to the leakage tripping coil through the second wire 72. The length of the swinging portion 42 is greater than the connecting portion 43, so as to facilitate contact with the static contact 5. The static contact 5 is in the shape of a flat plate, and the second partition plate 14 is provided with a mounting groove 16 for inserting the static contact 5. One end of the static contact 5 is inserted into the mounting groove 16 for limiting fit, and the other end is connected to the power supply circuit, for example, connected to the electronic component board 32 through the first wire 71, and is used to contact with the swinging portion 42 of the movable contact 4.

[0054] The leakage protection circuit breaker can be provided with one or more groups of the leakage power supply contacts. As an implementation method of this embodiment, when the electronic component board 32 draws power from the power supply through the leakage power supply contact, the electronic component board 32 is connected to the outlet terminal of the circuit breaker pole through the leakage power supply contact, the electronic component board 32 includes a take-in wire A, a take-in wire B, a take-in wire C and a take-in wire N, and the leakage protection circuit breaker is provided with four groups of the leakage power supply contacts, the take-in wire A, the take-in wire B, the take-in wire C and the take-in wire N are respectively connected to one of the moving contact pieces 4 or the static contact pieces 5 of the four groups of leakage power supply contacts, and at the same time, the other of the moving contact pieces 4 or the static contact pieces 5 is connected to the outlet terminal of the circuit breaker pole, and when the main circuit of the circuit breaker pole 2 is turned on and off, the electronic component board 32 is controlled to be powered on and off through the leakage power supply contact.

[0055] like Fig. 9 The circuit schematic diagram when the leakage power supply contact is to control the power supply of the electronic component board is shown. At least two groups of leakage power supply contacts are provided. In this embodiment, two groups of leakage power supply contacts are provided. The moving contact pieces 4 of the two groups of leakage power supply contacts are respectively provided on the driving member 6. Any two groups of power phase lines from the A phase line, the B phase line and the C phase line are connected to the moving contact pieces 4 of the two groups of leakage power supply contacts. The static contact pieces 5 of the two groups of leakage power supply contacts are respectively connected to the electronic component board 32 for powering the electronic component board 32. When three groups of leakage power supply contacts are provided, the moving contact pieces 4 of the three groups of leakage power supply contacts are respectively provided on the driving member 6. The A phase line, the B phase line and the C phase line are respectively connected to the moving contact pieces 4 of the three groups of leakage power supply contacts. The static contact pieces 5 of the three groups of leakage power supply contacts are respectively connected to the electronic component board 32 for powering the electronic component board 32. Of course, one group of the leakage power supply contacts can also be provided, and all belong to the protection scope of the utility model.

[0056] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0057] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope 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 (31), an electronic component board (32) and a leakage release (3), the circuit breaker pole (2) comprises a handle (21), an operating mechanism and a main circuit, the handle (21) drives the main circuit to be turned on and off through the operating mechanism, the leakage release (3) comprises a leakage release coil and a leakage release iron core (33) driven by the leakage release coil, characterized in that: The leakage protection pole (1) is provided with a leakage power supply contact composed of a moving contact piece (4) and a static contact piece (5), and a driving piece (6) for driving the moving contact piece (4) to contact and separate from the static contact piece (5); the leakage power supply contact composed of the moving 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 (32) and / or a leakage releaser (3); the driving piece (6) is linked with a handle (21) of a circuit breaker pole; when the main circuit of the circuit breaker pole (2) is turned on, the driving piece (6) is driven by the handle (21) to drive the moving contact piece (4) to contact with the static contact piece (5); when the main circuit of the circuit breaker pole (2) is turned off, the driving piece (6) is driven by the handle (21) to drive the moving contact piece (4) to separate from the static contact piece (5).

2. The leakage protection circuit breaker according to claim 1, characterized in that: The driving member (6) is rotatably arranged, and the moving contact member (4) is fixedly arranged on the driving member (6).

3. The leakage protection circuit breaker according to claim 1, characterized in that: The driving member (6) comprises a driving plate (61) and a driving shaft connected between the driving plate (61) and a handle (21) of the circuit breaker pole (2); the driving plate (61) is located in a housing of the leakage protection pole (1); the handle (21) of the circuit breaker pole (2) drives the driving plate (61) to rotate with the driving shaft as a rotation center via the driving shaft.

4. The leakage protection circuit breaker according to claim 1, characterized in that: The driving member (6) is provided with a first handle extending outside the housing of the leakage protection pole (1), and one end of the first handle extending outside the housing is linked to the handle (21) of the circuit breaker pole (2).

5. The leakage protection circuit breaker according to claim 3, characterized in that: The movable contact (4) is fixedly arranged on a drive plate (61); the drive shaft comprises a coaxially arranged pivot portion (62) and a drive portion (63); a handle (21) of the circuit breaker pole (2) is provided with a drive hole (22) for inserting the pivot portion (62); and the cross-sectional shape of the pivot portion (62) is the same as the cross-sectional shape of the drive hole (22).

6. The leakage protection circuit breaker according to claim 5, characterized in that: The driving plate (61) is provided with a fixing groove (64), the moving contact piece (4) comprises a fixing portion (41) inserted into the fixing groove (64) for limiting engagement, and a swinging portion (42) located at an eccentric position of the driving piece (6), the static contact piece (5) is located on the side of the swinging portion (42), and when the moving contact piece (4) rotates with the driving plate (61), the swinging portion (42) is driven to contact and separate from the static contact piece (5).

7. The leakage protection circuit breaker according to claim 1, characterized in that: The movable contact (4) comprises a swinging portion (42) and a connecting portion (43) which are arranged opposite to each other, and a fixed portion (41) connected between the swinging portion (42) and the connecting portion (43); the connecting portion (43) is connected to the power supply circuit via a second wire (72).

8. The leakage protection circuit breaker according to claim 1, characterized in that: The movable contact (4) is a spring or a spring. One end of the movable contact (4) is fixedly arranged and connected to the power supply circuit. The other end of the movable contact (4) is arranged between the driving member (6) and the static contact (5). The driving member (6) is used to push the movable contact (4) to bend toward the static contact (5) and contact the static contact (5).

9. The leakage protection circuit breaker according to claim 1, characterized in that: The invention relates to a shell of a leakage protection pole (1) composed of a first side plate (11) and a second side plate (12), and a second partition plate (14) arranged between the first side plate (11) and the second side plate (12); the first side plate (11) is located between the second side plate (12) and the circuit breaker pole (2); the moving contact piece (4), the static contact piece (5) and the driving piece (6) are located between the second partition plate (14) and the second side plate (12); the leakage release device (3) is located between the first side plate (11) and the second partition plate (14); the electronic component board (32) and the leakage release device (3) are located between the first side plate (11) and the second side plate (12); and the second partition plate (14) is provided with slots at portions corresponding to the electronic component board (32) and the zero-sequence current transformer (31).

10. The leakage protection circuit breaker according to claim 1, characterized in that: The leakage release (3), the moving contact (4), the static contact (5) and the driving member (6) are all arranged above the electronic component board (32) and the zero-sequence current transformer (31).

11. The leakage protection circuit breaker according to claim 9, characterized in that: The leakage release (3) is arranged on one side of the second partition (14), and the moving contact (4), the static contact (5) and the driving member (6) are arranged on the other side of the second partition (14) in a relative manner.

12. The leakage protection circuit breaker according to claim 9, characterized in that: The static contact (5) is in the shape of a flat plate. The second partition (14) is provided with a mounting groove (16) for inserting the static contact (5). One end of the static contact (5) is inserted into the mounting groove (16) for limited engagement, and the other end is connected to the power supply circuit and is used to contact the dynamic contact (4).

13. The leakage protection circuit breaker according to claim 9, characterized in that: The driving member (6) comprises a driving plate (61) and a driving shaft connected between the driving plate (61) and a handle (21) of the circuit breaker pole (2); the driving shaft comprises a coaxially arranged pivot portion (62) and a driving portion (63); the second partition plate (14) is provided with a mounting boss (15); a pivot hole is provided in the mounting boss (15); one end of the pivot portion (62) of the driving member (6) connected to the driving portion (63) is rotatably arranged in the pivot hole; one end of the pivot portion (62) away from the driving portion (63) is located outside the pivot hole and connected to the driving plate (61); the driving plate (61) is located on one side of the pivot portion (62) in a radial direction; when the pivot portion (62) rotates with the handle (21) of the circuit breaker pole (2), the pivot portion (62) drives the driving plate (61) to rotate.

14. The leakage protection circuit breaker according to claim 1, characterized in that: The static contact (5) is connected to a first wire (71), 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, the other end of the leakage tripping coil is connected to a third wire (73), and the first wire (71) and the third wire (73) are respectively connected to an electronic component board (32).

15. The leakage protection circuit breaker according to claim 1, characterized in that: It comprises two groups of leakage power supply contacts, the movable contact pieces (4) of the two groups of leakage power supply contacts are respectively arranged on a driving member (6), any two groups of power phase lines are connected to the movable contact pieces (4) of the two groups of leakage power supply contacts, and the static contact pieces (5) of the two groups of leakage power supply contacts are respectively connected to an electronic component board (32) for supplying power to the electronic component board (32).

16. The leakage protection circuit breaker according to claim 1, characterized in that: It comprises three groups of leakage power supply contacts, wherein the movable contact pieces (4) of the three groups of leakage power supply contacts are respectively arranged on a driving piece (6), and three groups of power phase lines are respectively connected to the movable contact pieces (4) of the three groups of leakage power supply contacts, and the static contact pieces (5) of the three groups of leakage power supply contacts are respectively connected to an electronic component board (32) for supplying power to the electronic component board (32).

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