CN218549492U - Leakage protection switch - Google Patents
Leakage protection switch Download PDFInfo
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- CN218549492U CN218549492U CN202022986741.5U CN202022986741U CN218549492U CN 218549492 U CN218549492 U CN 218549492U CN 202022986741 U CN202022986741 U CN 202022986741U CN 218549492 U CN218549492 U CN 218549492U
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Abstract
The utility model provides a leakage protection switch, include: mutual inductance module of current, control module and coil actuation module, control module includes: the leakage protection circuit comprises a leakage protection circuit, a microcontroller, a first capacitor, a first controllable switch, a second capacitor and a second controllable switch, wherein the output end of the leakage protection circuit is connected with the input end of the microcontroller, the first output end of the microcontroller is connected with one end of the first capacitor, the other end of the first capacitor is connected with the control end of the first controllable switch, the first end of the first controllable switch is connected with one end of the second capacitor and the control end of the second controllable switch respectively and then is connected with a first external power supply, the second end of the first controllable switch is connected with the other end of the second capacitor, the second end of the second controllable switch and the grounding end of the coil suction module respectively and is grounded, and the first end of the second controllable switch is connected with the power supply end of the coil suction module. Through implementing the utility model discloses, provide omnidirectional safety protection function for the user.
Description
Technical Field
The utility model relates to an earth leakage protection technical field, concretely relates to earth leakage protection switch.
Background
The increasing popularization of household appliances brings great convenience to our lives and brings many dangers to our lives, for example, when the problems of electric leakage, overload, short circuit and the like occur to the circuit, the electric appliances are easy to damage, and even an electric fire hazard is caused to the personal safety. The leakage protection device is used as equipment for protecting the life and property safety of people in a power distribution system, and can quickly cut off a power supply when the leakage danger occurs, so that people can safely use electricity, and unnecessary loss is avoided. However, with the progress of society, the existing earth leakage protection device has a single function, and cannot realize an all-around safety protection function.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect of earth leakage protection device function singleness among the prior art to a earth leakage protection switch is provided.
In order to achieve the above purpose, the utility model provides a following technical scheme:
an embodiment of the utility model provides a leakage protection switch, include: the circuit comprises a current mutual inductance module, a control module and a coil suction module, wherein the input end of the current mutual inductance module is connected with a circuit to be detected, and the output end of the current mutual inductance module is connected with the input end of the control module and is used for detecting a residual current signal of the circuit to be detected and sending the residual current signal to the control module to generate a tripping signal; the coil attracting module is connected with the output end of the control module and used for tripping and cutting off a circuit to be detected according to the tripping signal, and the control module comprises: the leakage protection circuit comprises a leakage protection circuit, a microcontroller, a first capacitor, a first controllable switch, a second capacitor and a second controllable switch, wherein the input end of the leakage protection circuit is connected with the output end of the current mutual inductance module, the output end of the leakage protection circuit is connected with the input end of the microcontroller, the first output end of the microcontroller is connected with one end of the first capacitor, the other end of the first capacitor is connected with the control end of the first controllable switch, the first end of the first controllable switch is connected with one end of the second capacitor and the control end of the second controllable switch respectively and then is connected with a first external power supply, the second end of the first controllable switch is connected with the other end of the second capacitor, the second end of the second controllable switch and the grounding end of the coil attraction module respectively and is grounded, and the first end of the second controllable switch is connected with the power supply end of the coil attraction module.
In one embodiment, the control module further comprises: the coil attracting module comprises a first resistor and a second resistor, wherein one end of the first resistor is connected with a first end of the first controllable switch, the other end of the first resistor is connected with the first external power supply, one end of the second resistor is connected with a first end of the second controllable switch, and the other end of the second resistor is connected with a power supply end of the coil attracting module.
In one embodiment, the coil attracting module includes: the relay comprises a relay and a first capacitor, wherein one end of a coil of the relay is respectively connected with one end of the first capacitor and one end of the second resistor, the other end of the coil of the relay is connected with the second end of the second controllable switch, and the other end of the first capacitor is grounded.
In one embodiment, the earth leakage protection switch further comprises: the input end of the first power supply module is connected with the line to be detected, and the output end of the first power supply module is connected with the control module and used for providing power for the control module.
In one embodiment, the earth leakage protection switch further comprises: and the input end of the second power supply module is connected with the line to be detected, and the output end of the second power supply module is connected with the coil attraction module and used for providing power for the coil attraction module.
In one embodiment, the second power module includes: the circuit comprises a second resistor, a second capacitor and a rectifier, wherein one end of the second resistor is connected with an L-phase line of a line to be detected, the other end of the second resistor is connected with one end of the second capacitor, the other end of the second capacitor is connected with the first end of the rectifier, the second end of the rectifier is connected with one end of a coil of the relay, the third end of the rectifier is connected with an N-phase line of the line to be detected, and the fourth end of the rectifier is grounded.
In one embodiment, the first controllable switch and the second controllable switch are insulated gate field effect transistors or triodes.
In one embodiment, the coil of the relay is a solenoid.
The utility model discloses technical scheme has following advantage:
the utility model provides a leakage protection switch, include: the circuit comprises a current mutual inductance module, a control module and a coil suction module, wherein the input end of the current mutual inductance module is connected with a circuit to be detected, and the output end of the current mutual inductance module is connected with the input end of the control module and used for detecting a residual current signal of the circuit to be detected and sending the residual current signal to the control module to generate a tripping signal; coil actuation module and control module's output with be connected for according to tripping signal tripping cut off wait to detect the circuit, control module includes: the leakage protection circuit comprises a leakage protection circuit, a microcontroller, a first capacitor, a first controllable switch, a second capacitor and a second controllable switch, wherein the input end of the leakage protection circuit is connected with the output end of the current mutual inductance module, the output end of the leakage protection circuit is connected with the input end of the microcontroller, the first output end of the microcontroller is connected with one end of the first capacitor, the other end of the first capacitor is connected with the control end of the first controllable switch, the first end of the first controllable switch is connected with one end of the second capacitor and the control end of the second controllable switch respectively and then connected with a first external power supply, the second end of the first controllable switch is connected with the other end of the second capacitor, the second end of the second controllable switch and the grounding end of the coil attraction module respectively and is grounded, and the first end of the second controllable switch is connected with the power supply end of the coil attraction module. Through set up earth leakage protection circuit, microcontroller, first electric capacity, first controllable switch, second electric capacity and second controllable switch in control module, not only can generate trip signal through earth leakage protection circuit and microcontroller after the electric leakage takes place, stop sending the PWM signal to first controllable switch, cut off and wait to detect the circuit, play earth leakage protection effect. Meanwhile, when the microcontroller fails to work, the first controllable switch is kept in a cut-off state by utilizing the blocking function of the first capacitor, and a line to be detected is cut off, so that the omnibearing safety protection function is provided for a user.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a specific example of an earth leakage protection switch according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a specific example of the leakage protection switch according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be connected through the inside of the two elements, or may be connected wirelessly or through a wire. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
An embodiment of the utility model provides a leakage protection switch can be used to circuit earth leakage protection, when taking place the electric leakage danger, can cut off the power fast, prevents the accident that the people's body electrocuted and the electric leakage arouses. As shown in fig. 1, the earth leakage protection switch comprises: the circuit comprises a current mutual inductance module 1, a control module 2 and a coil attracting module 3, wherein the input end of the current mutual inductance module 1 is connected with a circuit to be detected, and the output end of the current mutual inductance module 1 is connected with the input end of the control module 2 and is used for detecting a residual current signal of the circuit to be detected and sending the residual current signal to the control module 2 to generate a tripping signal; the coil attracting module 3 is connected with the output end of the control module 2, and is used for tripping and cutting off a circuit to be detected according to a tripping signal, as shown in fig. 2, the control module 2 comprises: the leakage protection circuit 21, the microcontroller 22, the first capacitor C3, the first controllable switch Q4, the second capacitor C4 and the second controllable switch Q2, wherein an input end of the leakage protection circuit 21 is connected with an output end of the current transformer module 1, an output end of the leakage protection circuit is connected with an input end of the microcontroller 22, a first output end of the microcontroller 22 is connected with one end of the first capacitor C3, the other end of the first capacitor C3 is connected with a control end of the first controllable switch Q4, a first end of the first controllable switch Q4 is connected with one end of the second capacitor C4 and a control end of the second controllable switch Q2 respectively and then is connected with a first external power supply, a second end of the first controllable switch Q4 is connected with the other end of the second capacitor C4, a second end of the second controllable switch Q2 and a grounding end of the coil attraction module 3 respectively and is grounded, and a first end of the second controllable switch Q2 is connected with a power supply end of the coil attraction module 3.
In an embodiment, as shown in fig. 2, the control module 2 further includes: the coil attracting module comprises a first resistor R6 and a second resistor R5, wherein one end of the first resistor R6 is connected with the first end of the first controllable switch Q4, the other end of the first resistor R6 is connected with a first external power supply, one end of the second resistor R5 is connected with the first end of the second controllable switch Q2, and the other end of the second resistor R5 is connected with the power supply end of the coil attracting module 3. The coil attracting module 3 includes: relay K1 and first electric capacity C2, wherein, relay K1's coil one end is connected with the one end of first electric capacity C2 and the one end of second resistance R5 respectively, and the other end of relay K1's coil is connected with the second end of second controllable switch Q2, and the other end ground connection of first electric capacity C2.
In the embodiment of the present invention, the first controllable switch Q4 and the second controllable switch Q2 are insulated gate field effect transistors or triodes, and the coil of the relay K1 is a spiral tube. When the current transformer module 1 does not detect a residual current signal (i.e., when the circuit works normally), the microcontroller 22 outputs a PWM signal to the control terminal of the first controllable switch Q4 through the first capacitor C3, so that the first controllable switch Q4 is turned on intermittently at a high frequency, the voltage across the second capacitor C4 is continuously discharged to the ground, the low voltage state across the second capacitor C4 is maintained, and thus the second controllable switch Q2 is kept at an off state, a power supply loop is provided for the coil attraction module 3, the solenoid in the coil attraction module 3 is powered by the second external power supply, and after the solenoid is electrified, the switch connected to the line to be detected is closed to connect the line to be detected. When the current transformer module 1 detects a residual current signal, the residual current is compared with a preset residual current value through a comparison circuit inside the leakage protection circuit 21, when the current residual current is larger than the preset residual current value, the leakage protection circuit 21 generates a leakage signal and sends the leakage signal to the microcontroller 22, the microcontroller 22 generates a trip signal according to the leakage signal, and stops outputting a PWM signal to the control end of the first controllable switch Q4, so that the first controllable switch Q4 is kept in a cut-off state. Because the first controllable switch Q4 is not conducted, the first external power supply can charge the second capacitor C4 through the first resistor R6, when the voltage at the two ends of the second capacitor C4 reaches a preset voltage value, the second controllable switch Q2 is triggered to be conducted, the voltage at the two ends of the first capacitor C2 is discharged to the ground through the second resistor R5 and the second controllable switch Q2, the spiral pipe is tripped due to voltage loss, and a circuit to be detected is cut off. The processes of generating the leakage signal by the leakage protection circuit 21 and generating the trip signal by the microcontroller 22 are both in the prior art, and are not described herein again. The voltage value can be set according to the requirement, and is not limited here. In the embodiment of the present invention, as shown in fig. 2, the current transformer module 1 includes: a current transformer CT1 and a current transformer CT2.
Specifically, since whether the leakage protection switch is operated or not is controlled by the microcontroller 22, if the microcontroller 22 stops outputting the PWM signal to the control terminal of the first controllable switch Q4 due to a long time or damage, even if the microcontroller 22 outputs a high level, the first controllable switch Q4 is rapidly turned off due to the dc blocking effect of the first capacitor C3, and the first power module 4 charges the second capacitor C4 through the first resistor R6, thereby triggering the second controllable switch Q2 to be turned on. The voltage at the two ends of the first capacitor C2 is discharged to the ground through the second resistor R5 and the second controllable switch Q2, and the spiral tube is tripped due to voltage loss, so that a circuit to be detected is cut off. Therefore, the leakage protection switch can not only cut off the line to be detected when the line leaks electricity to play a role of leakage protection, but also directly cut off the line to be detected when the clock in the microcontroller 22 stops, so as to prevent the microcontroller 22 from failing to act and failing to play a role of protection when the internal fault occurs the leakage.
The utility model provides a leakage protection switch, include: the circuit comprises a current mutual inductance module, a control module and a coil suction module, wherein the input end of the current mutual inductance module is connected with a circuit to be detected, and the output end of the current mutual inductance module is connected with the input end of the control module and used for detecting a residual current signal of the circuit to be detected and sending the residual current signal to the control module to generate a tripping signal; the coil actuation module is connected with the output end of the control module and is used for tripping and cutting off a circuit to be detected according to a tripping signal, and the control module comprises: the leakage protection circuit comprises a leakage protection circuit, a microcontroller, a first capacitor, a first controllable switch, a second capacitor and a second controllable switch, wherein the input end of the leakage protection circuit is connected with the output end of the current mutual inductance module, the output end of the leakage protection circuit is connected with the input end of the microcontroller, the first output end of the microcontroller is connected with one end of the first capacitor, the other end of the first capacitor is connected with the control end of the first controllable switch, the first end of the first controllable switch is connected with one end of the second capacitor and the control end of the second controllable switch respectively and then is connected with a first external power supply, the second end of the first controllable switch is connected with the other end of the second capacitor, the second end of the second controllable switch and the grounding end of the coil attraction module respectively and is grounded, and the first end of the second controllable switch is connected with the power supply end of the coil attraction module. Through set up earth leakage protection circuit, microcontroller, first electric capacity, first controllable switch, second electric capacity and second controllable switch in control module, not only can generate trip signal through earth leakage protection circuit and microcontroller after the electric leakage takes place, stop sending the PWM signal to first controllable switch, cut off and wait to detect the circuit, play earth leakage protection effect. Meanwhile, when the microcontroller fails to work, the first controllable switch is kept in a cut-off state by using the blocking function of the first capacitor, and a line to be detected is cut off, so that an all-directional safety protection function is provided for a user.
In one embodiment, as shown in fig. 1, the leakage protection switch further includes: the input end of the first power supply module 4 is connected with the line to be detected, and the output end of the first power supply module 4 is connected with the control module 2 and used for providing power for the control module 2.
In an embodiment, as shown in fig. 2, an input end of the first power module 4 is connected to a line to be detected, and an output end thereof is connected to the leakage protection circuit 21 and the microcontroller 22, respectively, for providing power to the leakage protection circuit 21 and the microcontroller 22. The first power module 4 can also charge the second capacitor C4 through the first resistor R6 when the first controllable switch Q4 is turned off, so as to trigger the second controllable switch Q2 to be turned on.
In an embodiment, as shown in fig. 1, the earth leakage protection switch further includes: and the input end of the second power module 5 is connected with the line to be detected, and the output end of the second power module 5 is connected with the coil attraction module 3 and used for providing power for the coil attraction module 3.
In one embodiment, as shown in fig. 2, the second power module 5 includes: the circuit comprises a second resistor R1, a second capacitor C1 and a rectifier D1, wherein one end of the second resistor R1 is connected with an L phase line of a circuit to be detected, the other end of the second resistor R1 is connected with one end of the second capacitor C1, the other end of the second capacitor C1 is connected with the first end of the rectifier D1, the second end of the rectifier D1 is connected with one end of a coil of the relay K1 to form an output power supply V1, the third end of the rectifier D1 is connected with an N phase line of the circuit to be detected, and the fourth end of the rectifier D1 is grounded. The embodiment of the utility model provides an in, wait to detect circuit L phase line and N phase line both ends and form second power module 5 through resistance-capacitance step-down, full wave rectification mode, for the spiral pipe power supply.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (8)
1. A residual current circuit breaker, comprising: a current mutual inductance module, a control module and a coil attracting module, wherein,
the input end of the current mutual inductance module is connected with a line to be detected, and the output end of the current mutual inductance module is connected with the input end of the control module, and the current mutual inductance module is used for detecting a residual current signal of the line to be detected and sending the residual current signal to the control module to generate a tripping signal;
the coil attracting module is connected with the output end of the control module and used for tripping and cutting off a circuit to be detected according to the tripping signal, and the control module comprises: the leakage protection circuit comprises a leakage protection circuit, a microcontroller, a first capacitor, a first controllable switch, a second capacitor and a second controllable switch, wherein the input end of the leakage protection circuit is connected with the output end of the current mutual inductance module, the output end of the leakage protection circuit is connected with the input end of the microcontroller, the first output end of the microcontroller is connected with one end of the first capacitor, the other end of the first capacitor is connected with the control end of the first controllable switch, the first end of the first controllable switch is connected with one end of the second capacitor and the control end of the second controllable switch after being connected, the first output end of the first controllable switch is connected with a first external power supply source, the second end of the first controllable switch is connected with the other end of the second capacitor, the second end of the second controllable switch and the grounding end of the coil suction module and is grounded, and the first end of the second controllable switch is connected with the power supply end of the coil suction module.
2. The earth leakage protection switch of claim 1, wherein the control module further comprises: the coil attracting module comprises a first resistor and a second resistor, wherein one end of the first resistor is connected with a first end of the first controllable switch, the other end of the first resistor is connected with the first external power supply, one end of the second resistor is connected with a first end of the second controllable switch, and the other end of the second resistor is connected with a power supply end of the coil attracting module.
3. A residual-current circuit breaker according to claim 2, characterized in that said coil pull-in module comprises: the relay comprises a relay and a first capacitor, wherein one end of a coil of the relay is connected with one end of the first capacitor and one end of the second resistor respectively, the other end of the coil of the relay is connected with the second end of the second controllable switch, and the other end of the first capacitor is grounded.
4. The earth leakage protection switch of claim 1, further comprising: the input end of the first power supply module is connected with the line to be detected, and the output end of the first power supply module is connected with the control module and used for providing power for the control module.
5. A residual current circuit breaker according to claim 3, characterized by further comprising: and the input end of the second power supply module is connected with the line to be detected, and the output end of the second power supply module is connected with the coil attraction module and used for providing power for the coil attraction module.
6. A residual current circuit breaker according to claim 5, characterized in that said second power supply module comprises: a second resistor, a second capacitor and a rectifier, wherein,
one end of the second resistor is connected with an L-phase line of the line to be detected, the other end of the second resistor is connected with one end of the second capacitor, the other end of the second capacitor is connected with the first end of the rectifier, the second end of the rectifier is connected with one end of a coil of the relay, the third end of the rectifier is connected with an N-phase line of the line to be detected, and the fourth end of the rectifier is grounded.
7. The earth leakage protection switch of claim 1, wherein the first controllable switch and the second controllable switch are insulated gate fets or triodes.
8. A residual current circuit breaker according to claim 3, characterized in that the coil of the relay is a solenoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022986741.5U CN218549492U (en) | 2020-12-10 | 2020-12-10 | Leakage protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022986741.5U CN218549492U (en) | 2020-12-10 | 2020-12-10 | Leakage protection switch |
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| Publication Number | Publication Date |
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| CN218549492U true CN218549492U (en) | 2023-02-28 |
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| CN202022986741.5U Active CN218549492U (en) | 2020-12-10 | 2020-12-10 | Leakage protection switch |
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| CN (1) | CN218549492U (en) |
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