Residual current circuit breaker with overcurrent protection

Abstract

A residual current circuit breaker with overcurrent protection, comprising a residual current protective pole (1) and at least one circuit breaker pole (2) arranged side by side, wherein the residual current protective pole (1) comprises a zero-sequence current transformer (31), an electronic component board (32), a residual current release (3) and an indicating mechanism (8), and a residual current power supply contact component assembly consisting of a moving contact component (4) and a stationary contact component (5), wherein the residual current power supply contact component assembly consisting of the moving contact component (4) and the stationary contact component (5) is connected in series within a power supply circuit for supplying power to the electronic component board (32) and / or the residual current release (3); the circuit breaker pole (2) comprises a handle (21), an operating mechanism, and a moving contact and a stationary contact, wherein the moving contact is connected to the operating mechanism; when an indicating button (81) is at a first indicating position, the moving contact component (4) is driven to come into contact with the stationary contact component (5); when electric leakage occurs, a residual current tripping core (33) acts to trigger the operating mechanism of the circuit breaker pole (2) to trip while the residual current tripping core (33) simultaneously drives the indicating button (81) to switch from the first indicating position to a second indicating position. When the indicating button (81) moves to the second indicating position, the moving contact component (4) separates from the stationary contact component (5), thereby preventing burn damage to the residual current release (3) and the electronic component board (32).

Description

Leakage protection circuit breaker

[0001] The present application claims priority to Chinese Patent Application No. 202410723931.8, filed on June 5, 2024, the contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present invention relates to the field of low-voltage electrical apparatus, in particular to a leakage protection circuit breaker. BACKGROUND

[0003] Low-voltage circuit breakers are commonly used to distribute electrical energy and to protect lines and electrical equipment from overload and short circuits, and can also be used for infrequent switching of lines and infrequent starting of motors.

[0004] In particular, electronic leakage circuit breakers, since the electronic component board is usually powered by the outgoing line of the leakage circuit breaker, it is stipulated that the leakage circuit breaker can only be connected to the power supply at the incoming line. However, if the user mistakenly connects the power supply to the outgoing line of the product during use, the electronic component board will always be in a powered state, 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 cause the tripping coil to burn out, causing the leakage protection function to fail.

[0005] 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 is powered through the outgoing line, the reverse electromotive force generated by the load will be directly applied 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 applied to the electronic component board will be directly applied to both ends of the leakage tripping coil, causing the coil to burn out and causing the leakage function to fail. SUMMARY

[0006] The present invention aims to overcome at least one of the drawbacks of the prior art and provides a leakage protection circuit breaker.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0008] 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, a moving contact and a stationary contact, the moving contact being connected to the operating mechanism, the handle driving the moving contact and the stationary contact to contact or separate through the operating mechanism, realizing the conduction and disconnection of the main circuit of the circuit breaker pole, the leakage tripping device comprising a leakage tripping coil and a leakage tripping core driven by the leakage tripping coil,

[0009] The indicating mechanism comprises an indicating button, which is movably arranged and has a first indicating position and a second indicating position.

[0010] The leakage protection pole is provided with a leakage power supply contactor group composed of a moving contact and a static contact, and the leakage power supply contactor group composed of the moving contact and the static contact is connected in series in a power supply loop for supplying power to the electronic component board and / or the leakage release.

[0011] When the indicating button is in the first indicating position, the moving contact and the static contact are in contact.

[0012] When leakage occurs, the leakage release plunger triggers the operating mechanism of the circuit breaker pole to release, and at the same time, the leakage release plunger triggers the indicating button to switch from the first indicating position to the second indicating position, and when the indicating button moves to the second indicating position, the moving contact is separated from the static contact.

[0013] Preferably, the indicating mechanism comprises an indicating button, a push plate, and an indicating spring, the indicating spring is connected with the indicating button, the indicating button comprises an indicating part and a locking part,

[0014] Pressing the indicating part can make the indicating button compress the indicating spring to move to the first indicating position in the direction of retracting into the housing, and at the same time, the push plate locks the locking part to lock the indicating button in the first indicating position, and the indicating button drives the moving contact and the static contact to be in contact.

[0015] When the leakage release triggers the circuit breaker pole to release, the leakage release plunger unlocks the locking part by driving the push plate, and the indicating spring drives the indicating button to move, so that the indicating part moves to the second indicating position in the direction of extending out of the housing, and the moving contact is reset to be separated from the static contact.

[0016] Preferably, the indicating button indirectly drives the moving contact through a separate driving member.

[0017] Preferably, the indicating button is provided with an integral driving part, and the indicating button directly drives the moving contact through the driving part.

[0018] Preferably, the push plate comprises a rotationally arranged push plate locking part, the push plate locking part is provided with a first locking groove and a second locking groove, the first locking groove is used for sleeving the locking part of the indicating button, and the second locking groove is used for penetrating the leakage release plunger, and the leakage release plunger is used for pulling the push plate to rotate, so that the first locking groove is separated from the locking part.

[0019] Preferably, the static contact is a wiring board, and the wiring board is electrically connected with the electronic component board through a wire.

[0020] Preferably, the static contact is a rod structure, one end of the static contact is fixedly connected with the shell, and the other end of the static contact penetrates through the electronic component board and is electrically connected with the electronic component board.

[0021] Preferably, the dynamic contact is an elastic conductor, the dynamic contact comprises a fixed part fixedly arranged on the shell and a contact part arranged to be bendable, the fixed part is connected with the power supply circuit through the second wire, and the contact part is located between the indication button and the static contact.

[0022] Preferably, the dynamic contact comprises an oscillating part and a connecting part arranged oppositely, and a fixed part connected between the oscillating part and the connecting part, the fixed part is inserted into the limiting groove of the shell, and the connecting part is located outside the limiting groove and is connected with the electric leakage tripping coil through the second wire.

[0023] Preferably, the driving part is arranged to rotate, and the dynamic contact is arranged on the driving part and moves with the driving part, and the indication button drives the driving part to rotate.

[0024] Preferably, the dynamic contact can also be directly arranged on the indication button and moves with the indication button.

[0025] Preferably, the electric leakage protection pole comprises 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, the zero sequence current transformer, the electric leakage tripping device, the dynamic contact, the static contact, the driving part and the indication mechanism are arranged on the first side plate.

[0026] Preferably, the electronic component board, the dynamic contact and the static contact are arranged on the side of the zero sequence current transformer, the electric leakage tripping device is arranged above the zero sequence current transformer, and the driving part and the indication mechanism are arranged above the dynamic contact and the static contact.

[0027] The electric leakage protection circuit breaker of the present application comprises an electric leakage power supply contact group composed of the dynamic contact and the static contact, and is linked with the indication mechanism, the electric leakage power supply contact group controls the electric leakage tripping coil and / or the electronic component board to take power from the power supply, when the indication button is located at the first indication position, the dynamic contact and the static contact are in contact, the electric leakage power supply contact group is closed to supply power to the electronic component board and / or the electric leakage tripping device, when the indication button is moved to the second indication position, the indication button is used to indicate that the electric leakage fault occurs, and the electric leakage power supply contact group is disconnected at the same time, the current cannot pass through the electronic component board and / or the electric leakage tripping device, 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 tripping device and the electronic component board will not be burned, and the reliability of the circuit breaker can be greatly improved. The power is usually taken from the power supply through the connection of the incoming line end and the outgoing line end of the circuit breaker pole, and of course, the electric leakage protection circuit breaker can be provided with a separate outgoing line end and incoming line end for taking power from the power supply.

[0028] In addition, the static contact passes through and is connected to the electronic component board, and is connected to the switching element on the electronic component board through the conductor printed on the electronic component board, so that the reliability is high, the assembly is convenient, and the step of welding the static contact and the wire can be omitted. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 is a structural schematic diagram of the leakage protection circuit breaker of the present application;

[0030] Fig. 2 is a structural schematic diagram of the leakage protection pole of the present application;

[0031] Fig. 3 is an indication state of the indication button retracted shell of the present application;

[0032] Fig. 4 is an indication state of the indication button extended shell of the present application;

[0033] Fig. 5 is a cooperation schematic diagram of the electronic component board and the static contact of the present application;

[0034] Fig. 6 is a structural schematic diagram of the moving contact of the present application;

[0035] Fig. 7 is a structural schematic diagram of the indication button and the driving member of the present application;

[0036] Fig. 8 is a structural schematic diagram of the push plate of the present application;

[0037] In the figures, the leakage protection pole 1; the circuit breaker pole 2; the leakage release 3; the zero sequence current transformer 31; the electronic component board 32; the leakage release core 33; the moving contact 4; the static contact 5; the handle 21; the first side plate 11; the second side plate 12; the first wire 71; the second wire 72; the third wire 73; the fixed part 41; the swing part 42; the connecting part 43; the indication mechanism 8; the indication button 81; the indication part 811; the locking part 812; the driving part 813; the push plate 82; the push rod locking part 821; the first locking groove 822; the second locking groove 823. DETAILED DESCRIPTION

[0038] The following embodiments given in combination with the accompanying drawings further illustrate the specific embodiments of the leakage protection circuit breaker of the present application. The leakage protection circuit breaker of the present application is not limited to the description of the following embodiments.

[0039] As shown in Fig. 1-2, the leakage protection circuit breaker of the embodiment comprises leakage protection poles 1 and at least one circuit breaker pole 2 arranged side by side, four circuit breaker poles 2 are arranged side by side in the embodiment, when the circuit breaker poles 2 are phase poles, the circuit breaker pole 2 comprises a main circuit diagram which does not show the incoming line end, the outgoing line end, the moving contact, the static contact, the overload tripping mechanism and the short-circuit tripping mechanism, and the operating mechanism for driving the moving contact and the static contact to contact and separate, the incoming line end and the outgoing line end are respectively used for connecting the power supply and the load, the moving contact and the static contact are respectively connected with the incoming line end and the outgoing line end, 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 and the static contact to contact or separate through the operating mechanism, so as to realize the conduction and disconnection of the main circuit of the circuit breaker pole 2; when the circuit breaker pole 2 is N pole, it usually only comprises the incoming line end, the outgoing line end, 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 does not set the overload tripping mechanism and the short-circuit tripping mechanism; of course, the circuit breaker pole 2 of N pole can not be set, and only the circuit breaker pole 2 of phase pole is set. The leakage protection pole 1 comprises a zero sequence current transformer 31, an electronic component board 32 and a leakage tripping device 3, the leakage tripping device 3 comprises a leakage tripping coil and a leakage tripping core 33 driven by the leakage tripping coil, the zero sequence current transformer 31 is electrically connected with the electronic component board 32, and the electronic component board 32 is electrically connected with the leakage tripping device 3, the main circuits of the four circuit breaker poles 2 respectively pass through the zero sequence current transformer 31, the zero sequence current transformer 31 is used for sensing the leakage current in the main circuit and transmitting the leakage signal to the leakage detection circuit of the electronic component board 32, the leakage detection circuit is used for processing the leakage signal and driving the leakage tripping device 3 to act when the leakage signal meets the condition, so that the leakage tripping device 3 drives the operating mechanism to trip, the tripped operating mechanism drives the moving contact and the static contact to separate, and the main circuit is disconnected to realize the protection function.

[0040] 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, a connecting rod is arranged between the jump buckle and the handle 21, and the two ends of the connecting rod are respectively rotatably 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 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 and the static contact to contact and separate, and the contact support is locked by the handle 21 when the moving contact and the static contact contact.

[0041] The leakage tripping device 3, overload tripping mechanism and short-circuit tripping mechanism can trigger the unlocking of the lock and the tripping of the operating mechanism when the leakage current, short-circuit current and overload current meet the conditions, respectively, at this time, the handle 21 cannot drive the contact support to rotate when the handle 21 rotates, and the handle 21 loses the locking of the contact support, the energy storage spring is released, the energy storage spring drives the contact support to rotate when the energy storage spring is released, so that the moving contact and the static contact are separated, and the leakage protection, short-circuit protection and overload protection functions are realized.

[0042] The short-circuit tripping device includes a short-circuit tripping coil and an iron core driven by the short-circuit tripping coil, the short-circuit tripping coil is connected with the static contact, and the short-circuit tripping coil drives the iron core to move when the short-circuit current flowing in the short-circuit tripping coil meets the action condition, and the iron core directly or indirectly triggers the unlocking of the lock and the tripping of the operating mechanism.

[0043] The overload tripping device includes a bimetallic strip, the bimetallic strip is connected with the moving contact, and the bimetallic strip directly or indirectly triggers the unlocking of the lock and the tripping of the operating mechanism when the bimetallic strip is bent due to temperature rise when the overload current flowing in the bimetallic strip meets the action condition.

[0044] An improved point of the embodiment is that an indication mechanism 8 cooperating with the leakage tripping device 3 is further arranged, 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 composed of the moving contact 4 and the static contact 5, and the leakage power supply contact group 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 tripping device 3; the indication button 81 drives the moving contact 4 and the static contact 5 to contact when the indication button 81 is located at the first indication position; the leakage tripping iron core 33 triggers the tripping of the operating mechanism of the circuit breaker pole 2 when the leakage tripping iron core 33 acts, and the leakage tripping iron core 33 triggers the indication button 81 to switch from the first indication position to the second indication position, the moving contact 4 and the static contact 5 are separated when the indication button 81 moves to the second indication position, and the power supply circuit for supplying power to the electronic component board 32 and / or the leakage tripping device 3 is disconnected.

[0045] The electric leakage protection circuit breaker of the embodiment forms an electric leakage power supply contactor group through the movable contact 4 and the static contact 5, and is linked with the indicating mechanism 8. The electric leakage power supply contactor group controls the electric leakage tripping coil and / or the electronic component board 32 to take power from the power source. When the indicating button 81 is in the first indicating position, the movable contact 4 and the static contact 5 are driven to contact each other, so that the electric leakage power supply contactor group is closed to supply power to the electronic component board 32 and / or the electric leakage tripping device 3. When the indicating button 81 is moved to the second indicating position, it is used to indicate that an electric leakage fault occurs, and at the same time, the electric leakage power supply contactor group is disconnected, so that the current cannot pass through the electronic component board 32 and / or the electric leakage tripping device 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 electric leakage tripping device 3 and the electronic component board 32 will not be burned, and the reliability of the circuit breaker can be greatly improved. The power is usually taken from the power source through the connection of the incoming line end and the outgoing line end of the circuit breaker pole 2. Of course, the electric leakage protection circuit breaker can be provided with a separate outgoing line end and incoming line end for taking power from the power source.

[0046] As shown in FIGS. 3-4, 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 with the indicating button 81. The indicating button 81 includes an indicating part 811 and a locking part 812. The indicating part 811 is pressed to compress the indicating spring 83 and move the indicating button 81 to the first indicating position in the direction of the retracted housing. At the same time, the push plate 82 locks the locking part 812, so that the indicating button 81 is locked in the first indicating position, and the indicating button 81 drives the movable contact 4 and the static contact 5 to contact each other. When the electric leakage tripping device triggers the tripping of the circuit breaker pole 2, the electric leakage tripping iron core 33 drives the push plate 82 to unlock the locking part 812, and the indicating spring 83 drives the indicating button 81 to move, so that the indicating part 811 moves to the second indicating position in the direction of extending out of the housing. The movable contact 4 is reset and separated from the static contact 5.

[0047] The indicating button 81 of the embodiment is provided with an integral driving part 813, and the indicating button 81 directly drives the movable contact 4 through the driving part 813. Of course, the indicating button 81 indirectly drives the movable contact 4 through an independent driving part, which also belongs to the protection scope of the present application.

[0048] As shown in Fig. 8, the push plate 82 comprises a rotating push plate locking part 821, which is provided with a first locking groove 822 and a second locking groove 823. The first locking groove 822 is used to wrap around the locking part 812 of the indication button 81, and the second locking groove 823 is used to pass through the electric leakage release core 33, so as to pull the push plate 82 to rotate and separate the first locking groove 822 from the locking part 812. The push plate 82 further comprises a release driving plate connected with the push plate locking part 821. The plane where the push plate locking part 821 is located is perpendicular to the release driving plate. The release driving plate is provided with a release trigger protrusion, which is used to trigger the lock catch of the operating mechanism of the circuit breaker pole 2, so as to separate the lock catch from the trip catch.

[0049] The electric leakage release 3 comprises an electric leakage release coil and an electric leakage release core 33 driven by the electric leakage release coil. The electronic component board 32 is provided with a switch element and an electric leakage detection circuit. The switch element is connected in series in a loop for supplying power to the electric leakage release 3 from a power source, and the electric leakage detection circuit can control the switch element to be closed and opened. The electric leakage detection circuit closes the switch element when the electric leakage current in the main loop of the circuit breaker pole 2 meets a condition. The switch element can be an electronic switch such as a relay or a MOS tube. An embodiment of a leakage power supply contact group connected to a power supply loop is that the electronic component board 32 takes power from the power source through the leakage power supply contact group, and the loop for supplying power to the electronic component board 32 is the power supply loop, and the leakage power supply contact group is only used to control the power supply loop for supplying power to the electronic component board 32. Alternatively, the electric leakage release coil, the switch element and the leakage power supply contact group are connected in series to take power from the power source as the power supply loop, and the leakage power supply contact group is used to control the power supply loop for supplying power to the electric leakage release coil of the electric leakage release 3. Of course, the leakage power supply contact group can also be used to control the power supply loop for supplying power to the electronic component board 32 and the electric leakage release coil at the same time.

[0050] When the indicating part 811 is pressed, the indicating button 81 is compressed and moves to the first indicating position in the direction of the retracted housing, and the push plate 82 locks the locking part 812, so that the indicating button 81 is locked in the first indicating position, the indicating button 81 drives the contact 4 and the static contact 5 to contact, and the electronic component board 32 and / or the electric leakage tripping device 3 is powered, the electric leakage detection circuit detects the electric leakage fault, triggers the switch element to close, the electric leakage tripping coil attracts the electric leakage tripping core 33 to act, when the electric leakage tripping core 33 acts, the push plate 82 triggers the lock of the circuit breaker pole 2 to be unlocked, the operating mechanism drives the moving contact and the static contact to separate and disconnect the main circuit of the circuit breaker pole 2, and at the same time, the electric leakage tripping core 33 drives the push plate 82 to unlock the locking part 812, the indicating spring 83 drives the indicating button 81 to move, so that the indicating part 811 moves to the second indicating position in the direction of extending out of the housing, and the moving contact 4 is reset and separated from the static contact 5, and the power supply to the electronic component board 32 and / or the electric leakage tripping coil is stopped.

[0051] As shown in FIGS. 1-3, the electric leakage protection pole 1 of the embodiment comprises a housing 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 electric leakage tripping device 3, the moving contact 4, the static contact 5 and the indicating mechanism 8 are arranged on the first side plate 11.

[0052] Preferably, the electronic component board 32, the moving contact 4 and the static contact 5 are arranged on the side of the zero sequence current transformer 31, the electric leakage tripping device 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, so that the space in the housing can be effectively utilized, and the layout is reasonable.

[0053] As shown in FIGS. 4-5, the static contact 5 is fixedly arranged on the first side plate 11, the moving contact 4 is connected with the second lead wire 72, one end of the electric leakage tripping coil is connected with the second lead wire 72, the other end of the electric leakage tripping coil is connected with the third lead wire 73, and the static contact 5 and the third lead wire 73 are respectively connected with two ends of the switch element on the electronic component board 32.

[0054] Further, the static contact 5 is in a rod structure, one end of the static contact 5 is fixedly connected with the first side plate 11, the other end of the static contact 5, i.e. the end of the static contact 5 away from the first side plate 11, penetrates the electronic component plate 32 and is electrically connected with the electronic component plate 32, the static contact 5 is connected with the switch element on the electronic component plate 32 through the conductor printed on the electronic component plate 32, so that the reliability is high, the assembly is convenient, and the step of welding the static contact 5 with the wire can be omitted. Of course, the static contact 5 can also be connected with the electronic component plate 32 by a wire, which belongs to the protection scope of the present application. Of course, the static contact 5 can also be in a flat plate shape or other shapes, and the static contact 5 can also be connected without penetrating the electronic component plate 32, the electronic component plate 32 can be connected with the electronic component plate 32 by a wire, especially a multi-pole residual current leakage protection circuit breaker with multiple breaker poles 2, and the electronic component plate 32 is not fixed, the static contact 5 can be a flat plate-shaped wiring board and be connected with the electronic component plate 32 by a wire.

[0055] As shown in FIGS. 3-4, the dynamic contact 4 of the present embodiment is a spring sheet, and the dynamic contact 4 can also be a spring or other elastic conductor with elasticity in other embodiments. The dynamic contact 4 includes a fixed part fixedly arranged on the shell and a contact part bendably arranged. The fixed part is connected to the power supply circuit through the second wire 72, such as being connected with the residual current release coil through the second wire 72. The contact part is located between the indication button 81 and the static contact 5. When the indication button 81 is in the first indication position, the contact part is pushed to bend towards the static contact 5 and contact the static contact 5. The dynamic contact 4 is reset under the self-elastic effect after the indication button 81 is reset.

[0056] Further, the dynamic contact 4 is in a U shape, which includes an oscillating part 42 and a connecting part 43 arranged oppositely, and a fixed part 41 connected between the oscillating part 42 and the connecting part 43. The shell is provided with a fixing groove 64 for inserting the fixed part 41, and the fixed part 41 is limited in position by being inserted into the fixing groove 64. The connecting part 43 is located outside the fixing groove 64 and is connected with the residual current release coil through the second wire 72.

[0057] It can be understood that the dynamic contact 4 is not limited to a U shape, and can be an elastic rod, an elastic sheet or a torsion spring, etc. The dynamic contact 4 can also be arranged on the driving member and move with the driving member, for example, the indication button 81 indirectly drives the dynamic contact 4 through an independent driving member, the driving member is rotatably arranged, the dynamic contact 4 is arranged on the driving member and moves with the driving member, the indication button 81 drives the driving member to rotate, the driving member drives the dynamic contact 4 to contact and separate from the static contact 5; or the dynamic contact 4 can also be directly arranged on the indication button 81 and move with the indication button 81, the indication button 81 drives the dynamic contact 4 to contact and separate from the static contact 5, which all belong to the protection scope of the present application.

[0058] 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 commonly used when in use, and are only for the convenience of description, and cannot be understood as indicating that the device or element referred to must have a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating relative importance.

[0059] 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 technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all 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, a moving contact and a stationary contact, the moving contact being connected to the operating mechanism, the handle (21) driving the moving contact and the stationary contact to contact or separate through the operating mechanism, realizing the on and off of the main circuit of the circuit breaker pole (2), the leakage release (3) comprising a leakage release coil and a leakage release core (33) driven by the leakage release coil, characterized in that: an indicating mechanism (8) is further arranged, the indicating mechanism (8) comprising an indicating button (81), the indicating button (81) being movably arranged and having a first indicating position and a second indicating position; the leakage protection pole (1) is provided with a leakage power supply contact group composed of a moving contact (4) and a stationary contact (5), the leakage power supply contact group composed of the moving contact (4) and the stationary contact (5) being connected in series in a power supply circuit for supplying power to the electronic component board (32) and / or the leakage release (3); the indicating button (81) drives the moving contact (4) and the stationary contact (5) to contact when the indicating button (81) is in the first indicating position; the leakage release core (33) triggers the operating mechanism of the circuit breaker pole (2) to release when leakage occurs, at the same time, the leakage release core (33) triggers the indicating button (81) to switch from the first indicating position to the second indicating position, and the moving contact (4) and the stationary contact (5) are separated when the indicating button (81) moves to the second indicating position.

2. The arc fault circuit interrupter of claim 1, wherein: the indicating mechanism (8) comprises the indicating button (81), a push plate (82) and an indicating spring (83), the indicating spring (83) being connected to the indicating button (81), the indicating button (81) comprising an indicating part (811) and a locking part (812), pressing the indicating part (811) can make the indicating button (81) compress the indicating spring (83) to move to the first indicating position in the direction of retracting into the housing, at the same time, the push plate (82) locks the locking part (812), so that the indicating button (81) is locked in the first indicating position, and the indicating button (81) drives the moving contact (4) and the stationary contact (5) to contact; when the leakage release triggers the circuit breaker pole (2) to release, the leakage release core (33) drives the push plate (82) to unlock the locking part (812), the indicating spring (83) drives the indicating button (81) to move, so that the indicating part (811) moves to the second indicating position in the direction of extending out of the housing, and the moving contact (4) is reset to separate from the stationary contact (5).

3. The arc fault circuit interrupter of claim 1, wherein: the indicating button (81) indirectly drives the moving contact (4) through an independent driving member.

4. The arc fault circuit interrupter of claim 1, wherein: the indicating button (81) is provided with an integral driving part (813), and the indicating button (81) directly drives the moving contact (4) through the driving part (813).

5. The arc fault circuit interrupter of claim 2, wherein: The push plate (82) comprises a rotationally arranged push plate locking portion (821) provided with a first locking groove (822) and a second locking groove (823), the first locking groove (822) is used for sleeving the locking portion (812) of the indication button (81), and the second locking groove (823) is used for penetrating the electric leakage release core (33) to pull the push plate (82) to rotate and separate the first locking groove (822) from the locking portion (812).

6. The arc fault circuit interrupter of claim 1, wherein: The static contact (5) is a terminal block, and the terminal block is electrically connected with the electronic component board (32) through a wire.

7. The arc fault circuit interrupter of claim 1, wherein: The static contact (5) is a rod structure, one end of the static contact (5) is fixedly connected with the shell, and the other end of the static contact (5) penetrates through the electronic component board (32) and is electrically connected with the electronic component board (32).

8. The arc fault circuit interrupter of claim 1, wherein: The dynamic contact (4) is an elastic conductor, the dynamic contact (4) comprises a fixed portion fixedly arranged on the shell and a contact portion bendably arranged, the fixed portion is connected to the power supply circuit through the second wire (72), and the contact portion is located between the indication button (81) and the static contact (5).

9. The arc fault circuit interrupter of claim 1, wherein: The dynamic contact (4) comprises an oscillating portion (42) and a connecting portion (43) arranged oppositely, and a fixed portion (41) connected between the oscillating portion (42) and the connecting portion (43), the fixed portion (41) is inserted into the fixed groove (64) of the shell for limiting, and the connecting portion (43) is located outside the fixed groove (64) and connected with the electric leakage release coil through the second wire (72).

10. The arc fault circuit interrupter of claim 3, wherein: The driving member is rotationally arranged, and the dynamic contact (4) is arranged on the driving member and moves with the driving member, and the indication button (81) drives the driving member to rotate.

11. The arc fault circuit interrupter of claim 1, wherein: The dynamic contact (4) is directly arranged on the indication button (81) and moves with the indication button (81).

12. The arc fault circuit interrupter of claim 1, wherein: The electric 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) 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 electric leakage release (3), the dynamic contact (4), the static contact (5), the driving member and the indication mechanism (8) are arranged on the first side plate (11) respectively.

13. The arc fault circuit interrupter of claim 12, wherein: The electronic component board (32), the dynamic contact (4) and the static contact (5) are arranged on the side surface of the zero sequence current transformer (31), the electric leakage release (3) is arranged above the zero sequence current transformer (31), and the driving member and the indication mechanism (8) are arranged above the dynamic contact (4) and the static contact (5).

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