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 present application relates to the field of low-voltage electrical apparatus, in particular to a leakage protection circuit breaker. BACKGROUND

[0002] Low-voltage circuit breakers are commonly used to distribute electric power and to protect the line and the power supply equipment from overload and short circuit, and also to serve as infrequent switching of the line and infrequent starting of the motor.

[0003] In particular, the electronic leakage circuit breaker, since the electronic component board is usually powered by the outlet terminal of the leakage circuit breaker, it is stipulated that the leakage circuit breaker can only be connected to the power supply at the inlet terminal and connected to the load at the outlet terminal. However, if the user mistakenly connects the power supply to the inlet terminal of the leakage circuit breaker, i.e. the leakage circuit breaker is reversed, the electronic component board will be in a powered state all the time, although the leakage tripping device can still act when there is a leakage current in the main circuit or when the test button is pressed, but this can easily lead to the coil of the tripping device being burned out, causing the leakage protection function to fail.

[0004] When the load is a high inductive or high capacitive load, if the power supply of the main circuit 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 is powered through the outlet terminal, i.e. the leakage circuit breaker is connected in normal mode, the reverse electromotive force generated by the load will be directly added to the electronic component board. At this time, if there is a leakage current in the main circuit or the test button is pressed, the above-mentioned reverse electromotive force directly added to the electronic component board will be directly added to both ends of the leakage tripping device coil, causing the coil to be burned out and causing the leakage function to fail. SUMMARY

[0005] The purpose of the present application is to overcome at least one of the defects of the prior art and provide a leakage protection circuit breaker.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A leakage protection circuit breaker, comprising a leakage protection pole and at least one circuit breaker pole arranged side by side, the leakage protection pole comprising a zero sequence current transformer, an electronic component board and a leakage tripping device, the circuit breaker pole comprising a handle, an operating mechanism and a main circuit, the handle driving the main circuit to be turned on and turned off through the operating mechanism, the leakage tripping device comprising a leakage tripping coil and a leakage tripping core driven by the leakage tripping 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 for driving 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 an electronic component board and / or a leakage tripping device, the driving member is linked with a 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 the static contact, when the main circuit of the circuit breaker pole is turned off, 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 rotationally arranged, and the moving contact is fixedly arranged on the driving member.

[0010] Preferably, the driving member comprises 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 a housing of the leakage protection pole, and the handle of the circuit breaker pole drives the driving plate to rotate around the driving shaft as the rotation center.

[0011] Preferably, the driving member is provided with a first handle extending out of the housing of the leakage protection pole, and an end of the first handle extending out of the housing is linked with the handle of the circuit breaker pole.

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

[0013] Preferably, the driving plate is provided with a fixing groove, the moving contact comprises a fixing portion inserted into the fixing groove for limiting cooperation, and a swing portion located at an eccentric position of the driving member, the static contact is located at a side of the swing portion, and the moving contact drives the swing portion to contact and separate from the static contact when the driving plate rotates.

[0014] Preferably, the moving contact comprises a swing portion and a connecting portion arranged oppositely, and a fixing portion connected between the swing portion and the connecting portion, and the connecting portion is connected to the power supply circuit through a second wire.

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

[0016] Preferably, the housing of the leakage protection pole comprises a first side plate and a second side plate, and a second partition plate is 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 plate and the leakage release are located between the first side plate and the second side plate, and the second partition plate is provided with a slot corresponding to the electronic component plate and the zero sequence current transformer.

[0017] Preferably, the leakage release, the moving contact, the static contact and the driving member are arranged above the electronic component plate and the zero sequence current transformer.

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

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

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

[0021] Preferably, the static contact is connected to a first wire, the moving contact is connected to a second wire, the second wire is used for connecting one end of a leakage release coil, the other end of the leakage release coil is connected to a third wire, and the first wire and the third wire are respectively connected to the electronic component plate.

[0022] Preferably, the leakage protection pole comprises two groups of leakage power supply contacts, the moving contacts of the two groups of leakage power supply contacts are respectively arranged on the driving members, any two groups of power supply 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 plate for supplying power to the electronic component plate.

[0023] Preferably, the leakage protection pole comprises three groups of leakage power supply contacts, the moving contacts of the three groups of leakage power supply contacts are respectively arranged on the driving members, three groups of power supply 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 plate for supplying power to the electronic component plate.

[0024] The electric leakage protection circuit breaker of the present application is characterized in that: the electric leakage power supply contact is formed by the movable contact and the fixed contact; the driving member is linked with the handle; the electric leakage power supply contact controls the power supply of the electronic component board and / or the electric leakage release from the power source; when the handle drives the electric leakage protection circuit breaker to close, the electric leakage power supply contact is closed to supply power to the electronic component board and / or the electric leakage release; when the electric leakage protection circuit breaker is opened, the handle drives the electric leakage power supply contact to be disconnected, so that the current cannot pass through the electronic component board and / or the electric leakage release; even if the incoming line end and the outgoing line end of the circuit breaker pole are connected reversely by mistake or the high inductive or capacitive load is connected, the electric leakage release coil and the electronic component board will not be burned, and the reliability of the circuit breaker can be greatly improved.

[0025] In addition, by arranging the movable contact, the fixed contact and the driving member on the second partition plate 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 DRAWINGS

[0026] Figure 1 is a structural schematic diagram of the electric leakage protection circuit breaker of the present application;

[0027] Figure 2 is a structural schematic diagram of the electric leakage protection pole of the present application;

[0028] Figure 3 is an exploded view of the electric leakage protection pole of the present application;

[0029] Figure 4 is a structural schematic diagram of the electric leakage protection pole of the present application;

[0030] Figure 5 is a structural schematic diagram of the electric leakage protection pole of the present application after the second partition plate is hidden;

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

[0032] Figure 7 is a structural schematic diagram of the driving member of the present application;

[0033] Figure 8 is a structural schematic diagram of the handle of the present application;

[0034] Figure 9 is a circuit principle diagram when the electric leakage power supply contact controls the power supply of the electronic component board of the present application;

[0035] In the figure, 1 is the leakage protection electrode; 2 is the circuit breaker electrode; 3 is the leakage trip unit; 31 is the zero-sequence current transformer; 32 is the electronic component board; 33 is the leakage trip core; 4 is the moving contact; 5 is the stationary contact; 6 is the driving component; 21 is the handle; 11 is the first side plate; 12 is the second side plate; 13 is the first partition; 14 is the second partition; 71 is the first wire; 72 is the second wire; 73 is the third wire; 61 is the driving plate; 62 is the pivot part; 63 is the driving part; 22 is the driving hole; 15 is the mounting boss; 64 is the fixing groove; 41 is the fixing part; 42 is the swinging part; 43 is the connecting part; and 16 is the mounting groove. Detailed Implementation

[0036] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the residual current circuit breaker of the present invention. The residual current circuit breaker of the present invention is not limited to the embodiments described below.

[0037] like Figures 1-2 As shown, the residual current circuit breaker in this embodiment includes residual current protection poles 1 and at least one circuit breaker pole 2 arranged side by side. This embodiment has four circuit breaker poles 2 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 terminal, an outgoing terminal, a moving contact, a stationary contact, an overload tripping mechanism, and a short-circuit tripping mechanism, as well as an operating mechanism for driving the moving contact to contact and separate from the stationary contact. The incoming terminal and the outgoing 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 terminal. The circuit breaker pole 2 is connected to the inlet and outlet terminals. The overload tripping mechanism and the short-circuit tripping mechanism are connected in series in the main circuit. The handle 21 drives the moving contact to contact or separate from the stationary contact through the operating mechanism, thereby realizing the conduction and disconnection of the main circuit of the circuit breaker pole 2. When the circuit breaker pole 2 is the N pole, it usually only includes the inlet terminal, outlet terminal, moving contact and stationary contact, as well as the operating mechanism for driving the moving contact to contact and separate from the stationary contact. The overload tripping mechanism and the short-circuit tripping mechanism are not provided. Of course, the circuit breaker pole 2 of the N pole can also be omitted, and only the phase pole circuit breaker pole 2 can be provided. The leakage protection electrode 1 includes a zero-sequence current transformer 31, an electronic component board 32, and a leakage trip unit 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 trip unit 3. The main circuits of the four circuit breaker electrodes 2 pass through the zero-sequence current transformer 31. 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 trip unit 3 to act when the leakage signal meets the conditions, so that the leakage trip unit 3 drives the operating mechanism to trip. The tripping operating mechanism drives the moving contact and the stationary contact to separate, disconnecting the main circuit to realize the protection function.

[0038] The operating mechanism comprises a contact support and an energy storage spring connected with the contact support, the contact support is respectively provided with a rotatable jump buckle and a lock buckle, the jump buckle and the lock buckle are snap-fitted, the jump buckle and the handle 21 are connected through a connecting rod, the two ends of the connecting rod are respectively connected with the handle 21 and the jump buckle, so that the handle 21 is connected with 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 drives 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 movable contact and the static contact to contact and separate, and the contact support compresses the energy storage spring when the movable contact and the static contact contact and is locked by the handle 21.

[0039] When the leakage current, the short-circuit current and the overload current respectively meet the conditions, the leakage release 3, the overload release mechanism and the short-circuit release mechanism can trigger the lock buckle to unlock the jump buckle, that is, drive the operating mechanism to release, at this time, the handle 21 cannot drive the contact support to rotate through the jump buckle when rotating, and the handle 21 loses the locking of the contact support, the energy storage spring is released, and the energy storage spring drives the contact support to rotate when being released, so that the movable contact and the static contact separate, thereby realizing the functions of leakage protection, short-circuit protection and overload protection.

[0040] The short-circuit release comprises a short-circuit release coil and an iron core driven by the short-circuit release coil, the short-circuit release coil is connected with the static contact, and when the short-circuit current flowing in 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 buckle and the jump buckle to release.

[0041] The overload release comprises a bimetallic strip, the bimetallic strip is connected with the movable contact, and when the overload current flowing in the bimetallic strip meets the action condition, the bimetallic strip is bent due to temperature rise, and then directly or indirectly triggers the lock buckle and the jump buckle to release.

[0042] One improvement point of the embodiment is that, as shown in Figure 5 The leakage protection pole 1 is provided with a leakage power supply contact composed of a movable contact 4 and a static contact 5, and a driving piece 6 for driving the movable contact 4 and the static contact 5 to contact and separate, the leakage power supply contact composed of the movable contact 4 and the static contact 5 is connected in series in a power supply loop for supplying power to the electronic component board 32 and / or the leakage release 3, the driving piece 6 is connected with the handle 21 of the circuit breaker pole, when the main loop of the circuit breaker pole 2 is turned on, the driving piece 6 is driven by the handle 21 to drive the movable contact 4 and the static contact 5 to contact, when the main loop of the circuit breaker pole 2 is turned off, the driving piece 6 is driven by the handle 21 to drive the movable contact 4 and the static contact 5 to separate, and the power supply loop for supplying power to the electronic component board 32 and / or the leakage release 3 is disconnected.

[0043] The leakage protection circuit breaker of the embodiment is provided with a leakage power supply contact formed by the movable contact 4 and the fixed contact 5, and the driving member is linked with the handle 21, and the leakage power supply contact is used to control the power supply of the electronic component board 32 and / or the leakage release 3 from the power supply. When the handle 21 drives the leakage protection circuit breaker to close, the leakage power supply contact is closed to 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 drives the leakage power supply contact to be opened, and the current cannot pass through the electronic component board 32 and / or the leakage release 3. Even if the incoming line end and the outgoing line end of the circuit breaker pole 2 are connected reversely by mistake or a high inductive or capacitive load is connected, the leakage release coil and the electronic component board 32 of the leakage release 3 will not be burnt, and the reliability of the circuit breaker can be greatly improved.

[0044] The leakage release 3 comprises a leakage release coil and a leakage release core 33 driven by the leakage release coil, the electronic component board 32 is provided with a switching element and a leakage detection circuit, the switching element is connected in series in the loop for supplying power to the leakage release 3 from the power supply, and the leakage detection circuit can control the switching element to be closed and opened. The leakage detection circuit closes the switching element when the leakage current in the main loop of the circuit breaker pole 2 meets the condition. The switching element can be a relay or an electronic switch such as a MOS tube. In one embodiment, the leakage power supply contact is connected to the power supply loop, the electronic component board 32 is connected to the power supply from the power supply through the leakage power supply contact, the loop for supplying power to the electronic component board 32 is the power supply loop, and the leakage power supply contact is used to control the power supply loop for supplying power to the electronic component board 32. Alternatively, the leakage release coil, the switching element and the leakage power supply contact are connected in series to the power supply as the power supply loop, and the leakage power supply contact is used to control the power supply loop 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 the power supply loop for supplying power to the electronic component board 32 and the leakage release coil.

[0045] When the handle 21 drives the leakage protection circuit breaker to close, the leakage power supply contact is closed to supply power to the electronic component board 32 and / or the leakage release 3. When the leakage detection circuit detects a leakage fault, the switching element is triggered to be closed. The leakage release coil attracts the leakage release core 33 to act. When the leakage release core 33 acts, the latch of the circuit breaker pole 2 is triggered to be unlocked and tripped. The operating mechanism drives the movable contact and the fixed contact to be separated and the main loop of the circuit breaker pole 2 to be opened. At the same time, the handle 21 of the circuit breaker pole drives the movable contact 4 and the fixed contact 5 to be separated through the driving member 6, and the power supply to the electronic component board 32 and / or the leakage release coil is stopped.

[0046] As Figure 3As shown, the leakage protection pole 1 of the embodiment comprises 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, the first side plate 11 is provided with a circuit breaker pole shell of a circuit breaker pole 2 away from one side of 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 first partition plate 13 is located between the second partition plate 14 and the first side plate 11, the electronic component plate 32, the zero sequence current transformer 31 and the leakage release 3 are arranged on the first side plate 11 and located 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 arranged on the second partition plate 14 and located between the second partition plate 14 and the second side plate 12, the leakage release 3 is located between the first side plate 11 and the second partition plate 14, the first partition plate 13 and the second partition plate 14 are provided with slots corresponding to the electronic component plate 32 and the zero sequence current transformer 31, the leakage power supply contact is installed through the first partition plate 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 plate 13 and the second partition plate 14 can be used for general materials, the embodiment is a 4P circuit breaker product, if a 3P circuit breaker product is used, one of the partition plates, such as the first partition plate 13 or the second partition plate 14, can be removed, and a 2P circuit breaker product can remove the first partition plate 13 and the second partition plate 14. The first side plate 11 can be independent of the circuit breaker pole shell, or can be integrally formed with the circuit breaker pole shell, and is part of the circuit breaker pole shell.

[0047] As Figure 4 shown, the static contact 5 is fixedly arranged on the second partition plate 14, the static contact 5 is connected with the first wire 71, the moving contact 4 is connected with the second wire 72, the second wire 72 is used for connecting one end of the leakage release coil, the other end of the leakage release coil is connected with the third wire 73, and the first wire 71 and the third wire 73 are respectively connected with two ends of the switch element on the electronic component plate 32.

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

[0049] As shown in Figures 6-8 The driving member 6 is arranged to rotate, and 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 can not be arranged on the driving member 6, and the moving contact 4 can 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 towards the static contact 5 and contact the static contact 5, and the moving contact 4 is reset under the elastic action of itself after the driving member 6 is reset, all of which belong to the protection scope of the present application.

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

[0051] The leakage protection pole 1 of the embodiment directly triggers the lock release and trip of the circuit breaker pole 2, and the energy storage mechanism and the corresponding handle 21 can also be provided, so that the leakage protection pole 1 triggers the lock release and trip of the circuit breaker pole 2 through the energy storage mechanism, and 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 notched circular or other shapes, and the driving plate 61 is also arranged on the axis of the pivot shaft, and the pivot shaft is connected with the side surface of the driving plate 61. In addition, the driving member 6 can also adopt other forms, for example, a first handle similar to the handle 21 of the circuit breaker pole 2 is provided, one end of the first handle extends to the outside of 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 present application.

[0052] Further, the driving plate 61 is provided with a fixing groove 64, the movable contact 4 comprises a fixing part 41 inserted into the fixing groove 64 for limiting cooperation, and a swing part 42 located at the eccentric position of the driving member 6, and the stationary contact 5 is located on the side surface of the swing part 42, when the driving plate 61 rotates, the swing part 42 drives the movable contact 4 to contact and separate from the stationary contact 5.

[0053] Specifically, the movable contact 4 is in U shape, which includes the swing part 42 and the connecting part 43 arranged oppositely, and the fixed part 41 connected between the swing part 42 and the connecting part 43, the connecting part 43 is outside the fixed groove 64 and connected to the power supply circuit through the second wire 72, for example, the connecting part 43 is connected to the leakage tripping coil through the second wire 72, the length of the swing part 42 is greater than that of the connecting part 43, which facilitates the contact with the static contact 5. The static contact 5 is in flat plate shape, the second partition plate 14 is provided with the 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 cooperation, 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 used for contacting the swing part 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 contact. As an embodiment of the present embodiment, when the electronic component board 32 takes power from the power supply through the leakage power supply contact, the electronic component board 32 is connected to the outlet end of the circuit breaker pole through the leakage power supply contact, the electronic component board 32 includes the power taking line A, the power taking line B, the power taking line C and the power taking line N, and the leakage protection circuit breaker is provided with four groups of the leakage power supply contact, the power taking line A, the power taking line B, the power taking line C and the power taking line N are respectively connected to one of the movable contact 4 or the static contact 5 of the four groups of the leakage power supply contact, and the other one of the movable contact 4 or the static contact 5 is connected to the outlet end of the circuit breaker pole, when the main circuit of the circuit breaker pole 2 is turned on and turned off, the electronic component board 32 is controlled to be powered on and powered off through the leakage power supply contact.

[0055] As Figure 9 The circuit principle diagram when the leakage power supply contact controls the power supply of the electronic component board is shown, at least two groups of the leakage power supply contact can be provided, and two groups of the leakage power supply contact are provided in the present embodiment, the movable contact 4 of the two groups of the leakage power supply contact is arranged on the driving part 6, any two groups of the power supply phase lines in the A-phase line, the B-phase line and the C-phase line are connected to the movable contact 4 of the two groups of the leakage power supply contact, the static contact 5 of the two groups of the leakage power supply contact is connected to the electronic component board 32, and used for supplying power to the electronic component board 32, when three groups of the leakage power supply contact are provided, the movable contact 4 of the three groups of the leakage power supply contact is arranged on the driving part 6, the A-phase line, the B-phase line and the C-phase line are connected to the movable contact 4 of the three groups of the leakage power supply contact, and the static contact 5 of the three groups of the leakage power supply contact is connected to the electronic component board 32, and used for supplying power to the electronic component board 32. Of course, one group of the leakage power supply contact can also be provided, which also belongs to the protection scope of the present application.

[0056] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when used, and are only for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating relative importance.

[0057] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as limiting the specific implementation of the present application. For ordinary skilled persons in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the scope of protection of the present application.

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, the leakage protection pole (1) comprising a zero sequence current transformer (31), an electronic component board (32) and a leakage release (3), the circuit breaker pole (2) comprising a handle (21), an operating mechanism and a main circuit, the handle (21) driving the main circuit to be on and off through the operating mechanism, the leakage release (3) comprising a leakage release coil and a leakage release 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 (4) and a stationary contact (5), and a driving member (6) for driving the moving contact (4) to contact and separate from the stationary contact (5), the leakage power supply contact composed of the moving contact (4) and the stationary 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), and the driving member (6) is connected with the handle (21) of the circuit breaker pole (2), when the main circuit of the circuit breaker pole (2) is on, the driving member (6) is driven by the handle (21) to drive the moving contact (4) to contact the stationary contact (5), and when the main circuit of the circuit breaker pole (2) is off, the driving member (6) is driven by the handle (21) to drive the moving contact (4) to separate from the stationary contact (5). The driving member (6) is arranged to rotate, and the moving contact (4) is fixedly arranged on the driving member (6).

2. The arc fault circuit interrupter of claim 1, wherein: The driving member (6) comprises 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 a housing of the leakage protection pole (1), and the handle (21) of the circuit breaker pole (2) drives the driving plate (61) to rotate around the driving shaft as the rotation center.

3. The arc fault circuit interrupter of claim 1, wherein: The driving member (6) is provided with a first handle extending out of the housing of the leakage protection pole (1), and one end of the first handle extending out of the housing is connected with the handle (21) of the circuit breaker pole (2).

4. The arc fault circuit interrupter of claim 1, wherein: The moving contact (4) is fixedly arranged on the driving plate (61), and the driving shaft comprises a pivot portion (62) and a driving portion (63) arranged coaxially, the handle (21) of the circuit breaker pole (2) is provided with a driving hole (22) for inserting the pivot portion (62), and the cross-sectional shape of the pivot portion (62) is the same as that of the driving hole (22).

5. The arc fault circuit interrupter of claim 3, wherein: The driving plate (61) is provided with a fixing groove (64), the moving contact (4) comprises a fixing portion (41) inserted into the fixing groove (64) for limiting cooperation, and a swing portion (42) located at an eccentric position of the driving member (6), the stationary contact (5) is located at the side of the swing portion (42), and the moving contact (4) drives the swing portion (42) to contact and separate from the stationary contact (5) when the driving plate (61) rotates.

6. The arc fault circuit interrupter of claim 5, wherein: The moving contact (4) comprises the swing portion (42) and a connecting portion (43) arranged oppositely, and the fixing portion (41) connected between the swing portion (42) and the connecting portion (43), and the connecting portion (43) is connected to the power supply circuit through a second lead wire (72).

7. The arc fault circuit interrupter of claim 1, wherein: ​ 8. The arc fault circuit interrupter of claim 1, wherein: The moving contact (4) is a spring, one end of the moving contact (4) is fixedly arranged in the power supply circuit, and the other end of the moving contact (4) is arranged between the driving member (6) and the static contact (5), and the driving member (6) is used for pushing the moving contact (4) to bend towards the static contact (5) and contact the static contact (5).

9. The arc fault circuit interrupter of claim 1, wherein: The housing of the leakage protection pole (1) comprises a first side plate (11) and a second side plate (12), and a second partition plate (14) is 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 (4), the static contact (5) and the driving member (6) are located between the second partition plate (14) and the second side plate (12), the leakage release (3) is located between the first side plate (11) and the second partition plate (14), the electronic component board (32) and the leakage release (3) are located between the first side plate (11) and the second side plate (12), and the second partition plate (14) is provided with a slot corresponding to the electronic component board (32) and the zero sequence current transformer (31).

10. The arc fault circuit interrupter of claim 1, wherein: 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).

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