Electric leakage release

Abstract

The embodiment of the utility model discloses an electric leakage release. The electric leakage release comprises a circuit board. The microswitch is arranged on one side of the circuit board; the trip coil is connected with the micro switch; and the execution mechanism is used for acting when the circuit breaker body is switched off and leakage current exists. The pushing mechanism is used for pushing the microswitch to be switched off or switched on; the executing mechanism is used for performing opening action when leakage current exists, and driving the pushing mechanism to enable the microswitch to be in a disconnected state; and the pushing mechanism is used for resetting when the executing mechanism is in a normal working switching-on state, so that the microswitch is in a normally-closed state. According to the technical scheme provided by the embodiment of the invention, the problem that the electric leakage tripper cannot realize a reverse incoming line function is solved.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of low-voltage electrical appliances, and in particular to a leakage release. Background Art

[0002] With the development of low-voltage electrical technology, people have higher and higher requirements for leakage releases. Residual current operated circuit breakers are generally composed of circuit breakers and current releases. When there is residual current after the circuit breaker is disconnected, the current release will operate to disconnect the leakage current path. Although the existing residual current operated circuit breakers can operate the circuit breakers through residual current, they cannot realize the reverse line function.

[0003] The existing leakage release cannot realize the reverse line function and does not meet the needs of users. Utility Model Content

[0004] The embodiment of the utility model provides a leakage release to solve the problem that the existing leakage release cannot realize the reverse line function and cannot meet the needs of users.

[0005] In order to achieve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model provides a leakage release device, comprising:

[0007] Circuit boards;

[0008] A micro switch is arranged on one side of the circuit board;

[0009] A trip coil, which is connected to a micro switch;

[0010] An actuator, which is used to actuate when the circuit breaker body is opened and there is leakage current;

[0011] A driving mechanism, the driving mechanism is used to drive the micro switch to open or close;

[0012] The actuator is used to open the switch when there is leakage current, driving the pushing mechanism to put the micro switch in an off state;

[0013] The pushing mechanism is used to reset the micro switch when the actuator is in a normally working closed state, so that the micro switch is in a normally closed state.

[0014] Optionally, the pushing mechanism comprises:

[0015] Push rod and elastic element;

[0016] One end of the push rod is connected to the elastic element. The push rod is arranged along the first direction. The push rod is used to move along the first direction under the abutment of the rotating shaft when the rotating shaft flips, so as to abut the micro switch to disconnect the micro switch.

[0017] The push rod is also used to reset under the elastic force of the elastic element when the trip coil is powered off and the locking structure locks the rotating shaft, so that the micro switch is in a normally closed state.

[0018] Optional, leakage release, also includes:

[0019] The cover shell comprises a bottom surface, the bottom surface of the cover shell is provided with a through hole, and the push rod is movably arranged in the through hole;

[0020] The bottom surface includes a first surface and a second surface which are arranged opposite to each other.

[0021] The first end of the push rod is disposed on the first surface, and the second end of the push rod is disposed on the second surface;

[0022] The first end of the elastic element is arranged on the second surface, and the second end of the elastic element is arranged on the second end of the push rod.

[0023] Optionally, the elastic element includes a spring or a retractable structure;

[0024] The maximum expansion and contraction amount of the elastic element is greater than or equal to the distance from the first end of the push rod to the micro switch.

[0025] Optionally, the circuit board is also provided with:

[0026] Circuit breaker switch module, power interface, transformer interface and trip coil interface; the circuit breaker body includes a circuit breaker switch module;

[0027] The power interface is used to connect the power module to the power terminal of the circuit breaker switch module;

[0028] The transformer interface is used to collect leakage current at the output end of the circuit breaker switch module; the power supply interface is used to connect the power supply end of the circuit breaker switch module;

[0029] The trip coil interface is used to connect the trip coil.

[0030] Optionally, the circuit board is also provided with:

[0031] A thyristor switch module, wherein the thyristor switch module is connected between the control module and the micro switch;

[0032] A control module, wherein the control module is used to determine whether the leakage current input by the transformer interface reaches the tripping requirement; when the leakage current input by the transformer interface reaches the tripping requirement, the thyristor switch module is driven to conduct, so that the tripping coil is powered on to drive the actuator to trip; the microswitch is connected between the thyristor switch module and the tripping coil interface, and the actuator is used to control the pushing mechanism to drive the microswitch to open when opening; and control the pushing mechanism to reset when closing, so that the microswitch is in a normally closed state.

[0033] Optionally, the circuit board is further provided with: a step-down module, the step-down module is connected between the control module and the first end of the trip coil interface;

[0034] The power module comprises an overvoltage protection unit and a rectifier unit. The overvoltage protection unit is connected in parallel with the power interface. The rectifier unit is connected between the overvoltage protection unit and the second end of the trip coil interface.

[0035] Optionally, the circuit board is also provided with:

[0036] A protection module, which is connected between the transformer interface and the control module;

[0037] The thyristor protection module is connected in series with the step-down module at a first node. The control module is connected to the first node. The control module is used to obtain an operating voltage from the first node.

[0038] Optional, thyristor switch module, including:

[0039] A first thyristor switch and a second thyristor switch;

[0040] The first end of the first thyristor switch is connected to the first end of the power module, the second end of the first thyristor switch is connected to the first end of the second thyristor switch, the control end of the first thyristor switch is connected to the output end of the control module, the second end of the second thyristor switch is connected to the first end of the micro switch, and the control end of the second thyristor switch is connected to the output end of the step-down module;

[0041] The second end of the micro switch is connected to the first end of the trip coil and the input end of the step-down module, and the second end of the trip coil is connected to the output end of the rectifier unit.

[0042] Optionally, the protection module includes a first resistor, a second resistor, a first capacitor, and a second capacitor;

[0043] A first end of the first resistor is connected to a first output end of the transformer interface and a first end of the first capacitor, and a second end of the first resistor is connected to a first input end of the control module and a first end of the second capacitor;

[0044] The first end of the second resistor is connected to the second output end of the transformer interface and the second end of the first capacitor, and the second end of the second resistor is connected to the second input end of the control module and the second end of the second capacitor.

[0045] The micro switch of the leakage release provided in this embodiment is arranged on one side of the circuit board, which improves the integration of the leakage release and reduces the volume of the leakage release. By setting the trip coil to be connected with the micro switch, a large current will flow through the trip coil when there is a leakage current, so as to realize the action of the actuator (opening). The actuator is connected to the pushing mechanism, and the actuator drives the pushing mechanism to act. When there is a leakage current, the trip coil obtains a large current, the actuator opens the gate, and drives the pushing mechanism to put the micro switch in the disconnected state; if there is still voltage in the power interface, the micro switch is disconnected, the current of the trip coil becomes smaller, and a large current will not be passed for a long time to burn the trip coil. This arrangement can not only realize the reverse line function, but also better perform leakage current protection, and also reduce the volume of the leakage release. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0047] Figure 1 This is a schematic diagram of the structure of a leakage release provided by the first embodiment of the utility model;

[0048] Figure 2 It is a structural schematic diagram of another leakage release provided in the first embodiment of the utility model;

[0049] Figure 3 This is a schematic diagram of the structure of a leakage release provided by the second embodiment of the utility model;

[0050] Figure 4 This is a schematic diagram of the structure of a driving mechanism of a leakage release provided in the second embodiment of the utility model;

[0051] Figure 5 It is a structural schematic diagram of a leakage release provided in Embodiment 3 of the present utility model. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0053] Based on the above technical problems, this embodiment proposes the following solutions:

[0054] Embodiment 1

[0055] Figure 1 It is a structural schematic diagram of a leakage release provided in Embodiment 1 of the utility model. Figure 2 This is a schematic diagram of the structure of another leakage release provided by the first embodiment of the utility model. Figure 1 and Figure 2 The leakage release provided in the first embodiment of the utility model includes: a circuit board 10; a micro switch SB2, which is arranged on one side of the circuit board 10; a tripping coil KA, which is connected to the micro switch SB2; an actuator (not shown in the figure), which is used to act when the circuit breaker body is opened and there is a leakage current; a pushing mechanism 40, which is used to push the micro switch SB2 to open or close; the actuator is used to open the switch when there is a leakage current, driving the pushing mechanism 40 to put the micro switch SB2 in an open state; the pushing mechanism 40 is used to reset the pushing mechanism 40 when the actuator is in a normally working closed state, so that the micro switch SB2 is in a normally closed state.

[0056] Specifically, the actuator may include a circuit breaker body opening and closing control structure system and a connection port for leakage driving opening, such as a traction rod in the circuit breaker body. The circuit breaker body may include a circuit breaker switch module. A pushing mechanism 40 is connected to the actuator, and the pushing mechanism 40 is used to move the pushing mechanism 40 along a first direction under the action of the actuator when opening the circuit, so that the micro switch SB2 is in an open state; and when in a normal working closing state, the actuator 40 is reset to put the micro switch SB2 in a normally closed state.

[0057] Circuit elements are arranged on the circuit board 10, and the circuit board 10 is used to electrically connect the circuit elements arranged on one side or both sides of the circuit board 10. The micro switch SB2 is arranged on one side of the circuit board 10, and the micro switch SB2 can be arranged on one side of the circuit board 10 by welding. The micro switch SB2 can include a spring, and when the spring is in a released state, the micro switch SB2 can be a normally closed switch, and when the spring is in a pressed state, the micro switch SB2 can be in an open state. The tripping coil KA can pass a larger current when there is a leakage current. The tripping coil KA passes a smaller current when there is no leakage current. The actuator acts according to the current size state of the tripping coil KA. When the current on the tripping coil KA is large, the actuator acts to drive the pushing mechanism 40 to move along the first direction. The first direction can be the displacement direction of the spring of the micro switch SB2. When the actuator 40 moves along the first direction, the actuator 40 abuts against the spring of the micro switch SB2, so that the spring of the micro switch SB2 is compressed, so that the micro switch SB2 is disconnected, and the large current on the tripping coil KA is disconnected. When there is no leakage current flowing through the circuit breaker body from the tripping coil KA and the circuit breaker body is closed, the push mechanism does not act. The push mechanism 40 is reset, so that the spring of the micro switch SB2 is separated from the actuator 40, thereby resetting the spring of the micro switch SB2, and further placing the micro switch SB2 in a normally closed state, waiting for the next leakage current to drive the tripping coil KA to act.

[0058] The micro switch SB2 of the leakage release provided in this embodiment is arranged on one side of the circuit board 10, which improves the integration of the leakage release and reduces the volume of the leakage release. By setting the tripping coil KA to be connected with the micro switch SB2, a large current will flow through the tripping coil KA when there is a leakage current, so that the tripping coil KA is actuated (a large current is passed). When the tripping coil KA is actuated (a large current is passed), the actuator is actuated to achieve leakage protection. The pushing mechanism 40 is connected to the actuator. When there is a leakage current, the pushing mechanism 40 moves along the first direction under the action of the actuator to make the micro switch SB2 in the disconnected state, so as to achieve the protection of the tripping coil KA from burning due to a long-term large current, and avoid the tripping coil KA from burning due to a long-term large current. When the circuit breaker body is closed, the actuator is locked and does not move, and the pushing mechanism 40 is reset so that the micro switch SB2 is in a normally closed state, and the circuit works normally. This arrangement can not only realize the reverse line function, but also better perform leakage current protection, and also reduce the volume of the leakage release.

[0059] Embodiment 2

[0060] Figure 3 It is a structural schematic diagram of a leakage release provided in the second embodiment of the utility model. Figure 4This is a schematic diagram of the structure of a driving mechanism of a leakage release provided in the second embodiment of the utility model. Figure 3 and Figure 4 The pushing mechanism 40 may include: a push rod 41 and an elastic element 42; one end of the push rod 41 is connected to the elastic element 42, and the push rod 41 is arranged along a first direction. The push rod 41 is used to move along the first direction under the action of the actuator when the circuit breaker body is opened, so as to abut against the micro switch SB2 to disconnect the micro switch SB2, so that the larger current on the trip coil KA is turned off, thereby protecting the trip coil KA; the push rod 41 is also used to reset under the elastic force of the elastic element 42 when the circuit breaker body is closed, so that the micro switch SB2 is in a normally closed state.

[0061] Specifically, the elastic element 42 is retractable. When the switch is opened, the actuator abuts against the push rod 41 so that the push rod 41 contacts the micro switch SB2 and disconnects the micro switch SB2, and the elastic element 42 is in a compressed state. When the switch is closed, the elastic element 42 is retracted and drives the push rod 41 to reset, thereby closing the micro switch SB2.

[0062] Optionally, based on the above embodiments, continue to refer to Figure 3 The leakage release also includes: a cover shell 50, the cover shell 50 includes a bottom surface, the bottom surface of the cover shell 50 is provided with a through hole (not shown in the figure), and the push rod 41 is movably arranged in the through hole; the bottom surface includes a first surface 51 and a second surface 52 arranged opposite to each other, the first end of the push rod 41 is arranged on the first surface 51, and the second end of the push rod 41 is arranged on the second surface 52; the first end of the elastic element 42 is arranged on the second surface 52, and the second end of the elastic element 42 is arranged on the second end of the push rod 41.

[0063] Specifically, the shape of the through hole can be set as needed, such as rectangular, circular, triangular, etc. The first surface 51 can be the inner surface of the bottom surface of the accommodating cavity formed by the housing 50. The second surface 52 can be the outer surface of the bottom surface of the accommodating cavity formed by the housing 50. The first end of the elastic element 42 is arranged on the second surface 52 of the housing 50, and the second end of the elastic element 42 is arranged on the second end of the push rod 41. When the elastic element 42 is compressed, the push rod 41 moves along the first direction, toward the direction close to the micro switch SB2, so that the micro switch SB2 is disconnected. When the elastic element 42 is reset from the telescopic state, the push rod 41 moves along the first direction, toward the direction away from the micro switch SB2, so that the micro switch SB2 is closed.

[0064] Optionally, based on the above embodiments, continue to refer to Figures 1 to 4 , the elastic element 42 includes a spring or a retractable structure; the maximum retractable amount of the elastic element 42 is greater than or equal to the distance from the first end of the push rod 41 to the micro switch SB2.

[0065] Specifically, the cross-sectional shape of the retractable structure includes an "S" shape, a wave shape, or other shapes that can achieve elastic retraction, which is not limited here.

[0066] Embodiment 3

[0067] Figure 5 This is a schematic diagram of the structure of a leakage release provided by the third embodiment of the utility model. Figure 5 The circuit board 10 is also provided with: a circuit breaker switch module Q1, a power interface 30, a transformer interface 60, a trip coil interface (not shown in the figure) and a control module 70; the circuit breaker switch module Q1 is connected between the power terminal S and the power interface 30, and the circuit breaker switch module Q1 is used to connect the power interface 30 and the power terminal S of the circuit breaker switch module Q1; the transformer interface 60 is used to collect the leakage current of the output end of the circuit breaker switch module Q1; the power interface 30 is used to connect the power terminal S of the circuit breaker switch module Q1; the trip coil interface is used to connect the trip coil KA.

[0068] Specifically, the circuit breaker body includes a circuit breaker switch module Q1.

[0069] Optionally, based on the above embodiments, continue to refer to Figure 5 The circuit board is also provided with: a thyristor switch module 80, which is connected between the control module 70 and the micro switch SB2; the control module 70, which is used to determine whether the leakage current input by the transformer interface 60 reaches the opening requirement; when the leakage current input by the transformer interface 60 reaches the opening requirement, the thyristor switch module 80 is driven to conduct, so that the trip coil KA is powered on to drive the actuator to open. The micro switch SB2 is connected between the thyristor switch module 80 and the trip coil interface, and the actuator is used to control the push mechanism 40 to drive the micro switch SB2 to open when opening; when closing, the push mechanism 40 is controlled to reset so that the micro switch SB2 is in a normally closed state.

[0070] Specifically, the control module 70 is used to determine that the leakage current of the circuit breaker switch module Q1 meets the action requirement. When in action, it controls the thyristor switch 80 to turn on, so that the trip coil KA generates a large current, and controls the micro switch SB2 to turn off through the actuator and the driving mechanism 40, thereby closing the thyristor switch 80.

[0071] Specifically, the circuit breaker switch module Q1 can be connected in series between the power supply terminal S and the power supply module 30. When the circuit breaker switch module Q1 is closed, the micro switch SB2 is in a normally closed state. When the circuit breaker switch module Q1 is closed, the transformer interface 60 detects the leakage current at the output end of the circuit breaker switch module Q1. When the leakage current signal is detected, the transformer interface 60 outputs the detected leakage current signal to the control module 70. The control module 70 controls the thyristor switch 80 to be turned on according to the leakage current signal, and the tripping coil KA is turned on with the thyristor switch 80 through the micro switch SB2. The tripping coil KA can obtain a larger current, so that the actuator is actuated, and the circuit breaker switch module Q1 is opened. At the same time, the actuator abuts the pushing mechanism 40, thereby controlling the micro switch SB2 to be turned off, and the current flowing through the thyristor switch 80 is turned off, and the tripping coil only retains a smaller power supply working current.

[0072] It should be noted that Figure 5 The case where the transformer interface 60 includes the test switch SB1 is shown as an example, but no limitation is given here. Figure 5 The power supply terminal S is exemplarily shown to include power supply terminal 1 and power supply terminal 2 of phase A, power supply terminal 3 and power supply terminal 4 of phase B, power supply terminal 5 and power supply terminal 6 of phase C, and power supply terminal of phase N, without any limitation herein.

[0073] Optionally, based on the above embodiments, continue to refer to Figure 3 The circuit board 10 is also provided with: a step-down module 90, which is connected between the control module 70 and the first end of the trip coil interface; a power module 30, which includes an overvoltage protection unit 301 and a rectifier unit 302, the overvoltage protection unit 301 is connected in parallel with the voltage interface, and the rectifier unit 302 is connected between the overvoltage protection unit 301 and the second end of the trip coil interface.

[0074] Specifically, the step-down module 90 may include resistors, and the number of resistors may be set as needed. For example, multiple resistors may be connected in series and / or in parallel. The rectifier module may include a half-bridge or full-bridge rectifier circuit. The power supply terminal S may include a three-phase power supply. A varistor may be set between the power supply terminals S, and the varistor is used for overvoltage protection. It should be noted that Figure 5 The first varistor RV1 , the second varistor RV2 , and the third varistor RV3 are shown by way of example, without any limitation.

[0075] The control end of the thyristor switch module 80 is connected to the output end of the control module 70. When the circuit breaker switch module Q1 is closed, the transformer interface 60 detects the leakage current. When the leakage current is detected, the transformer interface 60 outputs the detected leakage current to the control module 70. The control module 70 generates a high-level signal according to the leakage current signal. The high-level signal is input to the control end of the thyristor switch module 80 to control the thyristor switch module 80 to be turned on, so as to connect the power module 30 with the tripping coil KA through the turned-on micro switch SB2, so that a larger current flows through the tripping coil KA, thereby causing the actuator to abut against the pushing mechanism 40, and then controlling the micro switch SB2 to be turned off. After the micro switch SB2 is turned off, the larger current of the tripping coil KA is turned off, thereby avoiding the tripping coil KA from being burned due to excessive leakage current, thereby achieving the requirement of reverse line entry.

[0076] Optionally, based on the above embodiments, continue to refer to Figure 5 The circuit board 10 is also provided with: a protection module 20, which is connected between the transformer interface 60 and the control module 70; a thyristor protection module 100, which is connected in series with the step-down module 90 at a first node, and the control module 70 is connected to the first node, and the control module 70 is used to obtain the working voltage from the first node. The thyristor protection module 100 is connected in parallel with the thyristor switch module 80.

[0077] It should be noted that Figure 5 The thyristor protection module 100 includes a first TVS tube T1 and a second TVS tube T2 by way of example, and no limitation is made herein.

[0078] Specifically, the protection module 20 is used to reduce common mode interference and perform current limiting protection on the control module 70. The thyristor protection module 100 is used to protect the thyristor switch module 80 to prevent transient voltage from damaging the thyristor switch module 80.

[0079] Optionally, based on the above embodiments, continue to refer to Figure 5The thyristor switch module 80 includes: a first thyristor switch SCR1 and a second thyristor switch SCR2; a first end of the first thyristor switch SCR1 is connected to a first end of a micro switch SB2, a second end of the first thyristor switch SCR1 is connected to a first end of a second thyristor switch SCR2, a control end of the first thyristor switch SCR1 is connected to an output end of a step-down module 90, a second end of the second thyristor switch SCR2 is connected to an output second end of a rectifier unit 302, and a control end of the second thyristor switch SCR2 is connected to an output end of a control module 70; a second end of the micro switch SB2 is connected to a first end of a trip coil KA and an input end of the step-down module 90, and a second end of the trip coil KA is connected to an output first end of the rectifier unit 302.

[0080] Specifically, the second thyristor switch SCR2 is turned on according to the high level signal output by the control module 70. The first thyristor switch SCR1 is half-conducted according to the voltage signal output by the step-down module 90.

[0081] Optionally, based on the above embodiments, continue to refer to Figure 5 The protection module 20 includes a first resistor R2, a second resistor R3, a first capacitor C1 and a second capacitor C2; a first end of the first resistor R2 is connected to a first output end of the transformer interface 60 and a first end of the first capacitor C1, and a second end of the first resistor R2 is connected to a first input end of the control module 70 and a first end of the second capacitor C2; a first end of the second resistor R3 is connected to a second output end of the transformer interface 60 and a second end of the first capacitor C1, and a second end of the second resistor R3 is connected to a second input end of the control module 70 and a second end of the second capacitor C2.

[0082] Specifically, the first resistor R2 and the second resistor R3 function as the current limiting protection control module 70. The first capacitor C1 and the second capacitor C2 function to reduce common mode interference.

[0083] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A leakage release, characterized in that: include: Circuit boards; A micro switch is arranged on one side of the circuit board; A trip coil, wherein the trip coil is connected to the micro switch; An actuator, which is used to actuate when the circuit breaker body is opened and there is leakage current; A driving mechanism, the driving mechanism is used to drive the micro switch to open or close; The actuator is used to open the switch when there is leakage current, driving the pushing mechanism to put the micro switch in an off state; The pushing mechanism is used to reset the micro switch when the actuator is in a normally working closed state, so that the micro switch is in a normally closed state.

2. The leakage release according to claim 1, characterized in that: The driving mechanism comprises: Push rod and elastic element; One end of the push rod is connected to the elastic element, the push rod is arranged along a first direction, and the push rod is used to move along the first direction under the abutment of the rotating shaft when the rotating shaft of the actuator is turned over, so as to abut against the micro switch to disconnect the micro switch; The push rod is also used to reset under the elastic force of the elastic element when the trip coil is powered off and the locking structure of the actuator locks the rotating shaft, so that the micro switch is in a normally closed state.

3. The leakage release according to claim 2, characterized in that: Also includes: A cover shell, the cover shell comprising a bottom surface, the bottom surface of the cover shell is provided with a through hole, and the push rod is movably arranged in the through hole; The bottom surface includes a first surface and a second surface that are oppositely disposed. The first end of the push rod is disposed on the first surface, and the second end of the push rod is disposed on the second surface; The first end of the elastic element is arranged on the second surface, and the second end of the elastic element is arranged on the second end of the push rod.

4. The leakage release according to claim 3, characterized in that: The elastic element includes a spring or a retractable structure; The maximum expansion and contraction amount of the elastic element is greater than or equal to the distance from the first end of the push rod to the micro switch.

5. The leakage release according to claim 1, characterized in that: The circuit board is also provided with: Circuit breaker switch module, power interface, transformer interface and trip coil interface; the circuit breaker body includes the circuit breaker switch module; The transformer interface is used to collect the leakage current at the output end of the circuit breaker switch module; The power interface is used to connect the power supply end of the circuit breaker switch module; The trip coil interface is used to connect the trip coil.

6. The leakage release according to claim 5, characterized in that: The circuit board is also provided with: A control module and a thyristor switch module, wherein the thyristor switch module is connected between the control module and the micro switch; The control module is used to determine whether the leakage current input by the transformer interface meets the tripping requirement; When the leakage current input by the transformer interface reaches the tripping requirement, the thyristor switch module is driven to conduct, so that the tripping coil is powered on to drive the actuator to trip; the microswitch is connected between the thyristor switch module and the tripping coil interface, and the actuator is used to control the pushing mechanism to drive the microswitch to open when opening; when closing, the pushing mechanism is controlled to reset so that the microswitch is in a normally closed state.

7. The leakage release according to claim 6, characterized in that: The circuit board is also provided with: A step-down module, the step-down module is connected between the control module and the first end of the trip coil interface; A power module, the power module comprising an overvoltage protection unit and a rectifier unit, the overvoltage protection unit is connected in parallel with the power interface, and the rectifier unit is connected between the overvoltage protection unit and the second end of the trip coil interface.

8. The leakage release according to claim 7, characterized in that: The circuit board is also provided with: A protection module, the protection module is connected between the mutual inductor interface and the control module; The thyristor protection module is connected in series with the voltage-reducing module at a first node. The control module is connected to the first node. The control module is used to obtain an operating voltage from the first node.

9. The leakage release according to claim 8, characterized in that: The thyristor switch module comprises: A first thyristor switch and a second thyristor switch; The first end of the first thyristor switch is connected to the first end of the power module, the second end of the first thyristor switch is connected to the first end of the second thyristor switch, the control end of the first thyristor switch is connected to the output end of the control module, the second end of the second thyristor switch is connected to the first end of the micro switch, and the control end of the second thyristor switch is connected to the output end of the step-down module; The second end of the micro switch is connected to the first end of the trip coil and the input end of the step-down module, and the second end of the trip coil is connected to the output end of the rectifier unit.

10. The leakage release according to claim 9, characterized in that: The protection module includes a first resistor, a second resistor, a first capacitor and a second capacitor; The first end of the first resistor is connected to the first output end of the transformer interface and the first end of the first capacitor, and the second end of the first resistor is connected to the first input end of the control module and the first end of the second capacitor; The first end of the second resistor is connected to the second output end of the transformer interface and the second end of the first capacitor, and the second end of the second resistor is connected to the second input end of the control module and the second end of the second capacitor.

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