Leakage protection circuit breaker

Abstract

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, a leakage release and an indication mechanism, and a leakage power supply contact group consisting of a moving contact and a static contact, wherein the leakage power supply contact group consisting 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 release; the circuit breaker pole comprises a handle, an operating mechanism, a moving contact and a static contact, wherein the moving contact is connected to the operating mechanism, wherein when the indication button is located at a first indication position, the contact member and the static contact member are driven to contact, and when leakage occurs, the leakage release iron core is actuated to trigger the operating mechanism of the circuit breaker pole to release, and at the same time, the leakage release iron core drives the indication button to switch from the first indication position to the second indication position, and when the indication button moves to the second indication position, the moving contact member is separated from the static contact member, thereby preventing the leakage release and the electronic component board from burning.

Description

Technical Field

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

[0002] Low-voltage circuit breakers are 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 is usually powered by 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. However, if the user mistakenly connects the power supply to the output terminal of the product during use, the electronic component board will always be powered on. Although the residual current release can still work when there is leakage current in the main circuit or when the test button is pressed, it is easy to 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, 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 invention is to overcome at least one defect of the prior art and provide a leakage protection circuit breaker.

[0006] To achieve the above purpose, the present invention 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, a moving contact and a static contact, the moving contact is connected to the operating mechanism, the handle drives the moving contact to contact or separate with the static contact through the operating mechanism, so as to realize the main circuit of the circuit breaker pole being turned on and off, and the leakage release comprises a leakage release coil and a leakage release iron core driven by the leakage release coil,

[0008] An indication mechanism is also provided, the indication mechanism comprising an indication button, the indication button is movably arranged and has a first indication position and a second indication position;

[0009] The leakage protection electrode is provided with a leakage power supply contact group consisting of a dynamic contact and a static contact, and the leakage power supply contact group consisting of the dynamic 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 release;

[0010] When the indication button is at the first indication position, the driving contact piece is in contact with the static contact piece;

[0011] When leakage occurs, the leakage tripping iron core actuates to trigger the operating mechanism of the circuit breaker pole to trip, and at the same time, the leakage tripping iron core triggers the indication button to switch from the first indication position to the second indication position. When the indication button moves to the second indication position, the moving contact piece is separated from the static contact piece.

[0012] Preferably, the indicating mechanism comprises an indicating button, a push plate and an indicating spring, wherein the indicating spring is connected to the indicating button, and the indicating button comprises an indicating portion and a locking portion.

[0013] Pressing the indicating part can cause the indicating button to compress the indicating spring and move it to the first indicating position in the direction of retracting the housing, and at the same time the push plate locks the locking part, so that the indicating button is locked in the first indicating position, and the indicating button drives the contact piece to contact the static contact piece;

[0014] When the leakage release triggers the circuit breaker pole to trip, the leakage release iron core drives the push plate to unlock the locking part, and the indication spring drives the indication button to move, so that the indication part moves to the second indication position in the direction extending outside the shell, and the moving contact piece is reset and separated from the static contact piece.

[0015] Preferably, the indicator button indirectly drives the contact member via an independent driving member.

[0016] Preferably, the indicator button is provided with an integrated driving portion, and the indicator button directly drives the contact piece through the driving portion.

[0017] Preferably, the push plate includes a rotatably arranged push plate locking portion, on which a first locking groove and a second locking groove are provided, wherein the first locking groove is used to be sleeved on the locking portion of the indicator button, and the second locking groove is used to pass through the leakage tripping iron core, and the leakage tripping iron core is used to pull the push plate to rotate so that the first locking groove is separated from the locking portion.

[0018] Preferably, the static contact is a terminal block, and the terminal block is electrically connected to the electronic component board through a wire.

[0019] Preferably, the static contact is a rod structure, one end of the static contact is fixedly connected to the housing, and the other end of the static contact passes through the electronic component board and is electrically connected to the electronic component board.

[0020] Preferably, the movable contact is an elastic conductor, comprising a fixed portion fixedly arranged on the housing, and a bendable contact portion, the fixed portion is connected to the power supply circuit via a second wire, and the contact portion is located between the indicator button and the static contact.

[0021] Preferably, the dynamic contact includes a swinging part and a connecting part that are relatively arranged, and a fixed part connected between the swinging part and the connecting part, the fixed part is inserted into a fixing groove of the shell to limit the position, and the connecting part is located outside the fixing groove and is connected to the leakage trip coil through a second wire.

[0022] Preferably, the driving member is rotatably arranged, the dynamic contact member is arranged on the driving member and moves with the driving member, and the indicator button drives the driving member to rotate.

[0023] Preferably, the movable contact piece may also be directly arranged on the indicator button and move with the indicator button.

[0024] Preferably, the leakage protection pole includes a shell composed of a first side plate and a second side plate, the first side plate is located between the second side plate and the circuit breaker pole, and the electronic component board, zero-sequence current transformer, leakage release, moving contact, static contact, drive and indication mechanism are respectively arranged on the first side plate.

[0025] Preferably, the electronic component board, the moving contact and the static contact are respectively arranged on the sides of the zero-sequence current transformer, the leakage release is arranged above the zero-sequence current transformer, and the driving member and the indicating mechanism are arranged above the moving contact and the static contact.

[0026] The leakage protection circuit breaker of the present invention forms a leakage power supply contact group through a moving contact and a static contact, and is linked with the indicating mechanism. The leakage power supply contact group controls the leakage tripping coil and / or the electronic board component to draw power from the power supply. When the indicating button is located at the first indicating position, the driving contact and the static contact are in contact, so that the leakage power supply contact group is closed to supply power to the electronic component board and / or the leakage release. When the indicating button moves to the second indicating position, it is used to indicate the occurrence of a leakage fault, and at the same time drives the leakage power supply contact group to disconnect, so that 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 and the electronic component board will not be burned, which can greatly improve the reliability of the circuit breaker. Drawing power from the power supply is usually done by connecting the incoming and outgoing terminals of the circuit breaker pole to draw power. Of course, the leakage protection circuit breaker can also be provided with separate outgoing and incoming terminals for drawing power from the power supply.

[0027] In addition, the static contact passes through the electronic component board and is connected to the electronic component board. The static contact is connected to the switching element on the electronic component board through the conductor printed on the electronic component board. This not only has high reliability but also is easy to assemble, and the step of welding the static contact to the wire can be omitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the leakage protection circuit breaker created by the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the leakage protection electrode created by the present invention;

[0030] Figure 3 The present invention creates an indication state in which the indication button is retracted into the housing;

[0031] Figure 4 The invention creates an indication state in which the indication button extends out of the housing;

[0032] Figure 5 It is a schematic diagram of the cooperation between the electronic component board and the static contact piece created by the present invention;

[0033] Figure 6 It is a structural schematic diagram of a moving contact piece created by the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the indicating button and the driving member created by the present invention;

[0035] Figure 8 It is a structural schematic diagram of the push plate created by the present invention;

[0036] 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; handle 21; first side plate 11; second side plate 12; first wire 71; second wire 72; third wire 73; fixing part 41; swinging part 42; connecting part 43; indicating mechanism 8; indicating button 81; indicating part 811; locking part 812; driving part 813; push plate 82; push rod locking part 821; first locking groove 822; second locking groove 823. DETAILED DESCRIPTION

[0037] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the leakage protection circuit breaker created by the present invention. The leakage protection circuit breaker created by the present invention is not limited to the description of the following embodiments.

[0038] like Figure 1-2As shown, the leakage protection circuit breaker of this embodiment includes a leakage protection pole 1 and at least one circuit breaker pole 2 arranged side by side. In this embodiment, four circuit breaker poles 2 are arranged side by side. When the circuit breaker pole 2 is a phase pole, it includes an inlet terminal, an outlet terminal, a moving contact, a static contact, an overload tripping mechanism and a short-circuit tripping mechanism, which are not shown in the main circuit diagram, and an operating mechanism for driving the moving contact to contact and separate with the static contact. The inlet terminal and the outlet terminal are used to connect the power supply and the load respectively. The moving contact and the static contact are respectively connected to the inlet terminal. , and the outlet terminal are connected, the overload tripping mechanism and the short-circuit tripping 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 being turned on and off; when the circuit breaker pole 2 is an N pole, it usually only includes the incoming terminal, the outgoing 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 tripping mechanism and the short-circuit tripping mechanism are not set; of course, the circuit breaker pole 2 of the N pole may not be set, and only the circuit breaker pole 2 of the phase pole may 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 leakage release 3 includes a leakage release coil and a leakage release iron core 33 driven by the leakage release coil. 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] An improvement of the present embodiment is that an indication mechanism 8 cooperating with the leakage release 3 is further provided, the indication mechanism 8 includes an indication button 81, the indication button 81 is movably arranged, and has a first indication position and a second indication position, the leakage protection pole 1 is provided with a leakage power supply contact group consisting of a moving contact 4 and a static contact 5, the leakage power supply contact group consisting 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; when the indication button 81 is located at the first indication position, the moving contact 4 and the static contact 5 are driven to contact; when leakage occurs, the leakage release core 33 is actuated to trigger the operating mechanism of the circuit breaker pole 2 to trip, and at the same time, the leakage release core 33 triggers the indication button 81 to switch from the first indication position to the second indication position, and when the indication button 81 moves to the second indication position, the moving contact 4 is separated from the static contact 5, and the power supply circuit for supplying power to the electronic component board 32 and / or the leakage release 3 is disconnected.

[0044] The leakage protection circuit breaker of this embodiment forms a leakage power supply contact group through the dynamic contact 4 and the static contact 5, and is linked with the indicating mechanism 8. The leakage power supply contact group controls the leakage tripping coil and / or the electronic board component to take power from the power supply. When the indicating button 81 is located at the first indicating position, the dynamic contact 4 and the static contact 5 are driven to contact, so that the leakage power supply contact group is closed to supply power to the electronic component board 32 and / or the leakage release 3. When the indicating button 81 moves to the second indicating position, it is used to indicate the occurrence of a leakage fault, and at the same time drives the leakage power supply contact group to disconnect, so that 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 3 and the electronic component board 32 will not be burned, which can greatly improve the reliability of the circuit breaker. The power supply is usually connected to the incoming and outgoing terminals of the circuit breaker pole 2. Of course, the leakage protection circuit breaker may also be provided with separate incoming and outgoing terminals for drawing power from the power supply.

[0045] like Figure 3-4 As shown, the indicating mechanism 8 includes an indicating button 81, a push plate 82 and an indicating spring 83. The indicating button 81 is movably arranged, and the indicating spring 83 is connected to the indicating button 81. The indicating button 81 includes an indicating portion 811 and a locking portion 812. Pressing the indicating portion 811 can cause the indicating button 81 to compress the indicating spring 83 and move it to the first indicating position in the direction of retracting the housing. At the same time, the pushing plate 82 locks the locking portion 812, so that the indicating button 81 is locked in the first indicating position, and the indicating button 81 drives the contact member 4 to contact the static contact member 5. When the residual current release triggers the circuit breaker pole 2 to trip, the residual current release core 33 drives the pushing plate 82 to unlock the locking portion 812, and the indicating spring 83 drives the indicating button 81 to move, so that the indicating portion 811 moves to the second indicating position in the direction of extending outside the housing, and the moving contact member 4 is reset and separated from the static contact member 5.

[0046] The indicator button 81 of this embodiment is provided with an integrated driving part 813, and the indicator button 81 directly drives the contact member 4 through the driving part 813. Of course, the indicator button 81 indirectly drives the contact member 4 through an independent driving part, which also belongs to the protection scope of the present invention.

[0047] like Figure 8As shown, the push plate 82 includes a push plate locking portion 821 that is rotatably arranged, and a first locking groove 822 and a second locking groove 823 are provided on the push plate locking portion. The first locking groove 822 is used to be sleeved on the locking portion 812 of the indicator button 81, and the second locking groove 823 is used to pass through the leakage tripping iron core 33. The leakage tripping iron core 33 is used to pull the push plate 82 to rotate, so that the first locking groove 822 is separated from the locking portion 812. The push plate 82 also includes a tripping drive plate connected to the push plate locking portion 821. The plane where the push plate locking portion 821 is located is perpendicular to the tripping drive plate. The tripping drive plate is provided with a tripping triggering protrusion, which is used to trigger the lock of the operating mechanism of the circuit breaker pole 2, so that the lock and the tripping release the buckle.

[0048] 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 condition. The switch element can be an electronic switch such as a relay or a MOS tube. An embodiment of the leakage power supply contact group 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 group, 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 group 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 group are connected in series to take power from the power supply as the power supply circuit, and the leakage power supply contact group 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 group can also be used to control the power supply circuit that supplies power to the electronic component board 32 and the leakage trip coil at the same time.

[0049] Pressing the indicating portion 811 causes the indicating button 81 to compress the indicating spring 83 and move it in the direction of retracting the housing to the first indicating position. At the same time, the pushing plate 82 locks the locking portion 812, so that the indicating button 81 is locked in the first indicating position. The indicating button 81 drives the contact piece 4 to contact the static contact piece 5, and supplies power to the electronic component board 32 and / or the leakage releaser 3. After the leakage detection circuit detects the leakage fault, it triggers the closing of the switching element. The leakage release coil attracts the leakage release iron core 33 to act. When the leakage release iron core 33 acts, it drives the pushing plate 82 to trigger the lock unlocking trip of the circuit breaker pole 2, and drives the moving contact to separate from the static contact through the operating mechanism and disconnect the main circuit of the circuit breaker pole 2. At the same time, the leakage release iron core 33 drives the pushing plate 82 to unlock the locking portion 812, and the indicating spring 83 drives the indicating button 81 to move, so that the indicating portion 811 moves to the second indicating position in the direction extending outside the housing. The moving contact piece 4 is reset and separated from the static contact piece 5, and the power supply to the electronic component board 32 and / or the leakage release coil is stopped.

[0050] like Figure 1-3 As 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, the first side plate 11 is located between the second side plate 12 and the circuit breaker pole 2, and the electronic component board 32, the zero-sequence current transformer 31, the leakage release 3, the moving contact 4, the static contact 5 and the indicating mechanism 8 are respectively arranged on the first side plate 11.

[0051] Preferably, the electronic component board 32, the moving contact 4, and the static contact 5 are respectively arranged on the sides of the zero-sequence current transformer 31, the leakage release 3 is arranged above the zero-sequence current transformer 31, and the indicating mechanism 8 is arranged above the moving contact 4 and the static contact 5, which can effectively utilize the space in the shell and has the characteristics of reasonable layout.

[0052] like Figure 4-5 As shown, the static contact 5 is fixedly arranged on the first side plate 11, the dynamic contact 4 is connected to the second wire 72, the second wire 72 is used to connect one end of the leakage trip coil, and the other end of the leakage trip coil is connected to the third wire 73, and the static contact 5 and the third wire 73 are respectively connected to the two ends of the switch element on the electronic component board 32.

[0053] Further, the static contact 5 is a rod structure, one end of the static contact 5 is fixedly connected to the first side plate 11, and the other end of the static contact 5, that is, the end of the static contact 5 away from the first side plate 11, passes through the electronic component board 32 and is electrically connected to the electronic component board 32. The static contact 5 is connected to the switch element on the electronic component board 32 through the conductor printed on the electronic component board 32. This is not only highly reliable, but also easy to assemble, and the step of welding the static contact 5 to the wire can be omitted. Of course, the static contact 5 can also be connected to the electronic component board 32 by a wire, which belongs to the protection scope of this application. Of course, the static contact 5 can also be a flat plate shape or other shapes, and the static contact 5 can also be connected without passing through the electronic component board 32. The electronic component board 32 can also be connected to the electronic component board 32 by a wire, especially a multi-pole leakage protection circuit breaker with multiple circuit breaker poles 2, and when the electronic component board 32 is not fixed, the static contact 5 can use a flat plate-shaped wiring board and be connected to the electronic component board 32 by a wire.

[0054] like Figure 3-4 As shown, the movable contact 4 of this embodiment is a spring, and the movable contact 4 can also be a spring or other elastic conductor with elasticity in other embodiments. The movable contact 4 includes a fixed portion fixedly arranged on the shell, and a contact portion that can be bent. The fixed portion is connected to the power supply circuit through the second wire 72, such as being connected to the leakage trip coil through the second wire 72. The contact portion is located between the indicator button 81 and the static contact 5. When the indicator button 81 is located at the first indicating position, the contact portion is pushed to bend toward the static contact 5 and contact the static contact 5. After the indicator button 81 is reset, the movable contact 4 is reset under the action of its own elasticity.

[0055] Furthermore, the moving contact 4 is U-shaped, and includes a swinging portion 42 and a connecting portion 43 that are relatively arranged, and a fixed portion 41 connected between the swinging portion 42 and the connecting portion 43. The shell is provided with a fixing groove 64 for inserting the fixing portion 41, and the fixing portion 41 is inserted into the fixing groove 64 for limiting the position. The connecting portion 43 is located outside the fixing groove 64 and is connected to the leakage trip coil through a second wire 72.

[0056] It is understandable that the moving contact 4 is not limited to the U-shape, and may be an elastic rod, an elastic sheet or a torsion spring, etc. The moving contact 4 may also be arranged on the driving member and move with the driving member. For example, when the indicator button 81 indirectly drives the contact 4 through an independent driving member, the driving member is rotated, and the moving contact 4 is arranged on the driving member and moves with the driving member. The indicator button 81 drives the driving member to rotate, and the driving member drives the moving contact 4 to contact and separate with the static contact 5; or the moving contact 4 may also be directly arranged on the indicator button 81, and move with the indicator button 81, and the indicator button 81 drives the moving contact 4 to contact and separate with the static contact 5, which all belong to the protection scope of the present application.

[0057] It should be noted that in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship usually placed when in use, which is only for the convenience of description, and does not indicate that the device or element referred to must have a specific orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating relative importance.

[0058] The above content is a further detailed description of the invention in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the invention is limited to these descriptions. For ordinary technicians in the technical field to which the invention belongs, several simple deductions or substitutions can be made without departing from the concept of the invention, which should be regarded as falling within the scope of protection of the 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, a moving contact and a stationary contact, the moving contact is connected to the operating mechanism, the handle (21) drives the moving contact to contact or separate with the stationary contact through the operating mechanism, so as to realize the main circuit of the circuit breaker pole (2) being turned on and off, the leakage release (3) comprising a leakage release coil and a leakage release iron core (33) driven by the leakage release coil, Features: An indication mechanism (8) is also provided, the indication mechanism (8) comprising an indication button (81), the indication button (81) being movably arranged and having a first indication position and a second indication position; The leakage protection electrode (1) is provided with a leakage power supply contact group consisting of a moving contact (4) and a static contact (5), and the leakage power supply contact group consisting 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); When the indication button (81) is located at the first indication position, the driving contact piece (4) and the static contact piece (5) are in contact; When leakage occurs, the leakage tripping iron core (33) actuates to trigger the operating mechanism of the circuit breaker pole (2) to trip, and at the same time, the leakage tripping iron core (33) triggers the indication button (81) to switch from a first indication position to a second indication position. When the indication button (81) moves to the second indication position, the moving contact (4) is separated from the static contact (5).

2. The leakage protection circuit breaker according to claim 1, characterized in that: The indicating mechanism (8) comprises an indicating button (81), a push plate (82) and an indicating spring (83), wherein the indicating spring (83) is connected to the indicating button (81), and the indicating button (81) comprises an indicating portion (811) and a locking portion (812). Pressing the indicating portion (811) can cause the indicating button (81) to compress the indicating spring (83) and move it in the direction of retracting the housing to a first indicating position, while the push plate (82) locks the locking portion (812) to lock the indicating button (81) in the first indicating position, and the indicating button (81) drives the contact piece (4) and the static contact piece (5) to contact each other; When the leakage release triggers the circuit breaker pole (2) to trip, the leakage release iron core (33) drives the push plate (82) to unlock the locking portion (812), and the indication spring (83) drives the indication button (81) to move, so that the indication portion (811) moves to a second indication position in a direction extending outside the housing, and the moving contact (4) is reset and separated from the static contact (5).

3. The leakage protection circuit breaker according to claim 1, characterized in that: The indicating button (81) indirectly drives the contact member (4) via an independent driving member.

4. The leakage protection circuit breaker according to claim 1, characterized in that: The indicating button (81) is provided with an integrated driving portion (813), and the indicating button (81) directly drives the contact member (4) via the driving portion (813).

5. The leakage protection circuit breaker according to claim 2, characterized in that: The push plate (82) comprises a push plate locking portion (821) which is rotatably arranged, and a first locking groove (822) and a second locking groove (823) are provided on the push plate locking portion, wherein the first locking groove (822) is used to be sleeved on the locking portion (812) of the indicating button (81), and the second locking groove (823) is used to pass through the leakage tripping iron core (33), and the leakage tripping iron core (33) is used to pull the push plate (82) to rotate so as to separate the first locking groove (822) from the locking portion (812).

6. The leakage protection circuit breaker according to claim 1, characterized in that: The static contact piece (5) is a wiring board, and the wiring board is electrically connected to the electronic component board (32) through a wire.

7. The leakage protection circuit breaker according to claim 1, characterized in that: The static contact piece (5) is a rod structure, one end of the static contact piece (5) is fixedly connected to the housing, and the other end of the static contact piece (5) passes through the electronic component board (32) and is electrically connected to the electronic component board (32).

8. The leakage protection circuit breaker according to claim 1, characterized in that: The movable contact (4) is an elastic conductor, comprising a fixed portion fixedly arranged on the housing, and a contact portion that can be bent, the fixed portion being connected to the power supply circuit via a second wire (72), and the contact portion being located between the indicating button (81) and the static contact (5).

9. 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) arranged opposite to each other, and a fixing portion (41) connected between the swinging portion (42) and the connecting portion (43); the fixing portion (41) is inserted into a fixing groove (64) of the housing for limiting position; and the connecting portion (43) is located outside the fixing groove (64) and is connected to a leakage tripping coil via a second wire (72).

10. The leakage protection circuit breaker according to claim 3, characterized in that: The driving member is rotatably arranged, the moving contact member (4) is arranged on the driving member and moves with the driving member, and the indicating button (81) drives the driving member to rotate.

11. The leakage protection circuit breaker according to claim 1, characterized in that: The moving contact piece (4) is directly arranged on the indicating button (81) and moves with the indicating button (81).

12. The leakage protection circuit breaker according to claim 1, characterized in that: The leakage protection pole (1) comprises a shell composed of a first side plate (11) and a second side plate (12), the first side plate (11) being located between the second side plate (12) and the circuit breaker pole (2), and the electronic component board (32), the zero-sequence current transformer (31), the leakage release (3), the moving contact (4), the static contact (5), the driving member and the indicating mechanism (8) being respectively arranged on the first side plate (11).

13. The leakage protection circuit breaker according to claim 12, characterized in that: The electronic component board (32), the moving contact (4), and the static contact (5) are respectively arranged on the side of the zero-sequence current transformer (31), the leakage release (3) is arranged above the zero-sequence current transformer (31), and the driving member and the indicating mechanism (8) are arranged above the moving contact (4) and the static contact (5).

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