Multifunctional circuit breaker

Abstract

A multifunctional circuit breaker belongs to the technical field of circuit breakers and comprises a key power switch, a circuit breaker body, a first voltage detection circuit, a second voltage detection circuit, an electric leakage detection circuit, a control circuit, a receiving circuit and a rectifying circuit. The first voltage detection circuit, the second voltage detection circuit, the electric leakage detection circuit, the control circuit and the rectification circuit are installed outside the side end of a shell of the circuit breaker body and are electrically connected, and the receiving circuit is moved to a management personnel end. The circuit breaker has the functions of opening and closing a power supply and protecting electric leakage of a common circuit breaker, in application, under the combined action of related mechanisms, when the power supply voltage of a corresponding area is too high or too low and the shell leaks electricity, a user can be actively prompted in a wireless mode, the power supply is delayed to be closed, faults of electric equipment due to abnormal voltage are reduced, and the safety of the electric equipment is improved. And moreover, an output power supply can be switched off through the key power switch, so that the electric shock accident of a worker caused by the fact that the circuit breaker body is closed by other personnel during maintenance is prevented.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker equipment technology, and in particular to a multifunctional circuit breaker. Background Technology

[0002] A circuit breaker is a device capable of closing, carrying, and interrupting current under normal and abnormal circuit conditions. Based on their application, circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers. Circuit breakers play a crucial role in power systems. They not only distribute electrical energy but also protect power lines and loads, thereby protecting equipment and systems. This function is equivalent to a combination of a fuse switch and an over / under-temperature relay, and typically, no parts need to be replaced after interrupting a fault current. Circuit breakers generally also have leakage current and overcurrent protection functions (equipped with a test button; pressing the test button simulates a short circuit or grounding at the circuit breaker output, causing the circuit breaker to trip and disconnect the power supply to the load).

[0003] With the development of power technology, circuit breaker technology has also made some progress. For example, the authorized patent in my country, patent number "201820717994.2" entitled "Circuit Breaker Detection Device and Circuit Breaker," states that "this circuit breaker detection device can comprehensively and accurately detect the impact of the electromagnet in the circuit breaker. This circuit breaker can comprehensively and accurately report the impact of the electromagnet." As can be seen above, although this patent has improved internal heat dissipation and relatively increased the service life of the circuit breaker to some extent, it still has the disadvantage of relatively limited functionality due to structural limitations. Specifically, it cannot monitor the input power supply voltage in real time. Therefore, if the voltage rises or falls due to various reasons, there is a possibility of damage to the electrical equipment after a long period of time. Second, it cannot detect whether there is leakage in the casing (e.g., excessive humidity in the application area, internal electrical abnormalities causing the casing to become electrified). When leakage occurs in the casing due to various internal reasons, workers may be unaware and risk electric shock by touching the casing. Utility Model Content

[0004] To overcome the shortcomings of existing circuit breakers due to structural limitations, as described in the background, this utility model provides a multi-functional circuit breaker based on the circuit breaker body. This circuit breaker not only has the functions of switching power and providing leakage protection as a common circuit breaker, but also, in application, can proactively and wirelessly alert the user and delay power shutdown when the power supply voltage in the corresponding area is too high or too low, or when there is leakage in the casing, under the combined action of related mechanisms. This reduces the probability of electrical equipment malfunctions due to abnormal voltage or electric shock accidents caused by casing leakage. Furthermore, the output power can be shut off via a key-operated power switch, preventing other personnel from closing the circuit breaker body during maintenance and causing electric shock accidents to workers.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A multi-functional circuit breaker includes a key-operated power switch, a circuit breaker body, and further comprises a first voltage detection circuit, a second voltage detection circuit, a leakage current detection circuit, a control circuit, a receiving circuit, and a rectifier circuit. The first voltage detection circuit, the second voltage detection circuit, the leakage current detection circuit, the control circuit, and the rectifier circuit are mounted on the outer casing of the circuit breaker body, while the receiving circuit is located at the operator's end. The circuit breaker body is electrically connected in series with a power supply via the key-operated power switch. The power output terminal of the circuit breaker body is electrically connected to the power input terminal of the rectifier circuit, and the power output terminal of the rectifier circuit is electrically connected to the power input terminals of the first voltage detection circuit, the second voltage detection circuit, the control circuit, and the leakage current detection circuit. The signal output terminals of the first voltage detection circuit, the second voltage detection circuit, and the leakage current detection circuit are electrically connected to the signal input terminal of the control circuit, and the signal output terminal of the control circuit is electrically connected to the two contacts below the test button on the circuit breaker body.

[0007] Furthermore, the first voltage detection circuit includes an adjustable resistor, a resistor, and an NPN transistor that are electrically connected. One end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the NPN transistor, and the other end of the first resistor is connected to the emitter of the NPN transistor.

[0008] Furthermore, the second voltage detection circuit includes an adjustable resistor, a resistor, and an NPN transistor that are electrically connected. One end of the adjustable resistor is connected to one end of the first resistor, the other end of the adjustable resistor is connected to one end of the second resistor, one end of the third resistor is connected, the other end of the third resistor is connected to the base of the first NPN transistor, the collector of the first NPN transistor is connected to the other end of the first resistor and one end of the fourth resistor, the other end of the fourth resistor is connected to the base of the second NPN transistor, and the emitters of the two NPN transistors are connected to the other end of the second resistor.

[0009] Furthermore, the leakage current detection circuit includes an electrically connected resistor, a silicon controlled rectifier (SCR), and a transistor. One end of the first resistor is connected to the control electrode of the SCR, the cathode of the SCR is connected to one end of the second resistor, the other end of the second resistor is connected to the base of the transistor, and the other end of the first resistor is connected to the housing of the circuit breaker body.

[0010] Furthermore, the control circuit includes an electrically connected wireless transmitting circuit module, a time control switch, and a relay. The positive power input terminal of the first relay is connected to the control power input terminal. The normally open contact terminal of the first relay is connected to the positive power input terminal of the time control switch and the wireless transmitting circuit module. The power output terminal of the time control switch is connected to the power input terminal of the second relay. The negative power input terminal of the time control switch is connected to the negative power input terminal of the wireless transmitting circuit module.

[0011] Furthermore, the two contacts under one of the wireless signal transmission buttons of the wireless transmission circuit module are connected together by a wire.

[0012] Furthermore, the receiving circuit includes an electrically connected battery, a wireless receiving circuit module, and a buzzer. The two terminals of the battery and the power input terminals of the wireless receiving circuit module are respectively connected, and the power output terminal of the wireless receiving circuit module and the power input terminal of the buzzer are connected.

[0013] The beneficial effects of this utility model are as follows: This new model is suitable for use in production, office areas, or homes, and has the functions of an ordinary circuit breaker in opening or closing the output power supply, as well as automatic tripping when there is a short circuit or grounding at the load end. In application, under the combined action of the first voltage detection circuit and the second voltage detection circuit, the voltage data of the power supply area can be detected in real time. When the voltage is too high or too low, a signal can be output to the control circuit. The leakage current detection circuit can detect whether the casing is energized in real time, and when the casing is energized, it can also output a signal to the control circuit. After the control circuit receives the control signal, it can immediately issue a warning sound to the receiving circuit of relevant personnel (such as managers in the office area). Relevant personnel can promptly remind users of various electrical equipment to turn off the power (for example, reminding clerks to turn off the computer to prevent forced sudden power shutdown that may cause data loss). After a period of time, the circuit breaker body will automatically turn off the main power supply, preventing damage to electrical equipment caused by prolonged continuous high or low voltage, and reducing the chance of electric shock to workers due to casing leakage. Furthermore, the output power can be turned off by the key power switch, preventing other personnel from closing the circuit breaker body during maintenance and causing electric shock accidents to workers. Based on the above, this novel invention has good application prospects. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 , 2 This is a schematic diagram of the structure of this utility model;

[0016] Figure 3 This is the circuit diagram of this utility model. Detailed Implementation

[0017] Figure 1 , 2As shown in Figure 3, the multi-functional circuit breaker includes a key power switch SK, a circuit breaker body B, and also has a first voltage detection circuit 1, a second voltage detection circuit 2, a leakage current detection circuit 3, a control circuit 4, a receiving circuit 5, and a rectifier circuit 6. The first voltage detection circuit 1, the second voltage detection circuit 2, the leakage current detection circuit 3, the control circuit 4, and the rectifier circuit 6 are installed inside a housing 7, which is installed on the outside of the right side of the outer shell of the circuit breaker body B. The receiving circuit 5 is carried by the user. The keyhole of the key power switch SK is located on the outside of the upper front end of the housing 7.

[0018] Figure 1 , 2As shown in Figure 3, the first voltage detection circuit includes an adjustable resistor RP1, resistors R1 and R2, and an NPN transistor Q1 connected via circuit board wiring. One end of the adjustable resistor RP1 is connected to one end of the first resistor R1 and one end of the second resistor R2. The other end of the second resistor R2 is connected to the base of the NPN transistor Q1, and the other end of the first resistor R1 is connected to the emitter of the NPN transistor Q1. The second voltage detection circuit includes an adjustable resistor RP2, resistors R3, R4, R5, and R6, and NPN transistors Q2 and Q3 connected via circuit board wiring. One end of the adjustable resistor RP2 is connected to one end of the first resistor R5, and the other end of the adjustable resistor RP2 is connected to one end of the second resistor R3 and one end of the third resistor R4. The other end of the third resistor R4 is connected to the base of the first NPN transistor Q2. The collector of the first NPN transistor Q2 is connected to the other end of the first resistor R5 and one end of the fourth resistor R6. The other end of the fourth resistor R6 is connected to the base of the second NPN transistor Q3. The emitters of the two NPN transistors Q2 and Q3 are connected to the other end of the second resistor R3. The rectifier circuit includes a bridge rectifier U1, a capacitor C, and a transformer T connected by circuit board wiring. The two ends of the secondary winding of the transformer T are connected to the power input terminals 1 and 2 of the bridge rectifier U1, respectively. The positive power output terminal 3 of the bridge rectifier U1 is connected to the positive terminal of the capacitor C, and the negative power output terminal 4 of the bridge rectifier U1 is connected to the negative terminal of the capacitor C. The control circuit includes a wireless transmitting circuit module U, a time control switch U3, and relays K2 and K1 connected via circuit board wiring. The positive power input terminal of the first relay K1 is connected to the control power input terminal. The normally open contact terminal of the first relay K1 is connected to pin 1 of the positive power input terminal of the time control switch U3 and pin 1 of the positive power input terminal of the wireless transmitting circuit module U. Pins 3 and 4 of the power output terminal of the time control switch U3 are connected to the two power input terminals of the second relay K2 respectively. Pin 2 of the negative power input terminal of the time control switch U3 is connected to pin 2 of the negative power input terminal of the wireless transmitting circuit module U. The two contacts under the first transmitting button D1 of the wireless transmitting circuit module are pre-connected together (equivalent to when a person presses the first transmitting button D1, the two contacts under the first transmitting button D1 close). The leakage current detection circuit includes resistors R7 and R8, a silicon controlled rectifier (SCR) VS, and a transistor Q4 connected by circuit board wiring. One end of the first resistor R7 is connected to the control electrode of the SCR VS, the cathode of the SCR VS is connected to one end of the second resistor R8, the other end of the second resistor R8 is connected to the base of the transistor Q4, and the other end of the first resistor R7 is mounted to the outside of the circuit breaker body B by metal bolts.The receiving circuit includes a battery G1, a charging socket CZ1, a power switch S1, a wireless receiving circuit module U5, and a buzzer B, all connected via circuit board wiring and installed inside component box 8. The two terminals of battery G1 are connected to the two ends of charging socket CZ1 (when battery G1 is depleted, an external 12V power charger can be plugged into charging socket CZ1 to charge it). The positive terminal of battery G1 is connected to one end of power switch S1. The other end of power switch S1, the negative terminal of battery G1, and pins 1 and 2 of the power input terminals of wireless receiving circuit module U5 are connected to the power output terminals 3 and 2 of wireless receiving circuit module U5. The power output terminals 3 and 2 of wireless receiving circuit module U5 are connected to the two power input terminals of buzzer B. The handle of power switch S1 and the socket of charging socket CZ1 are located outside two openings at the front of component box 8.

[0019] Figure 1 , 2 As shown in Figure 3, the AC power phase line and one terminal of the key power switch SK are connected by a wire; the other terminal of the key power switch SK, the AC power neutral line, and the power input terminal of the circuit breaker body B are connected by a wire; the power output terminal of the circuit breaker body B (and the power input terminals of all electrical loads are connected by a wire) and the two ends of the primary winding of the transformer T at the power input terminal of the rectifier circuit are respectively connected by wires; the positive and negative terminals of the capacitor C at the power output terminal of the rectifier circuit and the other end of the adjustable resistor RP1 and the other end of the resistor R1 at the power input terminal of the first voltage detection circuit, the other end of the adjustable resistor R2 and the other end of the resistor R3 at the power input terminal of the second voltage detection circuit, the positive power input terminal of the relay K1 at the power input terminal of the control circuit and pin 2 of the time control switch U3, and the anode of the thyristor VS and the emitter of the transistor Q4 at the power input terminal of the leakage current detection circuit are respectively connected by wires. The signal output terminals of the first voltage detection circuit (NPN transistor Q1 collector), the second voltage detection circuit (NPN transistor Q3 collector), the leakage current detection circuit (NPN transistor Q4 collector), and the control circuit (relay K1 negative power input terminal) are connected by wires. The control contact and normally open contact of the control circuit's signal output terminal (relay K2) are connected by wires to the two contacts below the test button SY on the circuit breaker body. Figure 3In this circuit breaker, B is a finished product of model DZ47S; capacitor C is a 470μF / 200V electrolytic capacitor (for filtering); resistors R1, R2, R3, R4, R5, R6, R7, and R8 have resistance values ​​of 10KΩ, 47KΩ, 10KΩ, 47KΩ, 100KΩ, 47KΩ, 4.7MΩ, and 4.7KΩ respectively; NPN transistors Q1, Q2, Q3, and Q4 are model 9013; battery G1 is a 12V / 5Ah lithium battery; power socket CZ1 is a coaxial power socket; buzzer B is a finished product of model FM12V active continuous sound buzzer alarm; wireless transmitting circuit module U and wireless receiving circuit module U5 are finished products of model NTY-A4YK wireless transceiver components (wireless signal transmission and reception distance 500 meters). The wireless transmitting circuit module U has four transmit buttons, and the wireless receiving circuit module U5 has four output terminals, consistent with the structure and function of ordinary automotive wireless transceiver components; relays K1 and K2 are DC 12V relays; transformer T is a finished AC 220V to AC 9V transformer; the time control switch U3 is a fully automatic timer controller of model KG316T, which has two power input terminals, two power output terminals, and seven setting buttons. By operating the seven setting buttons, the power interval time and total output time of the two power output terminals can be set; adjustable resistors RP1 and RP2 are 470K (adjustable to 15.052K and 14.42K respectively); the rectifier bridge U1 is model KBP301; the thyristor VS is model MCR100-1. All the above electrical components are existing mature technologies, and their working principles will not be described in detail in this application.

[0020] Figure 1 , 2As shown in Figure 3, this new type of circuit breaker is suitable for use in production, office areas, or homes. The circuit breaker body B has the functions of opening or closing the output power supply of a normal circuit breaker, as well as automatic tripping in case of load short circuit or grounding (the above are existing mature technologies and will not be described in detail in this embodiment). After the circuit breaker body B is opened, 220V AC power will enter the power input terminal (both ends of the primary winding) of the transformer T. The secondary winding of the transformer T outputs low current and low voltage AC power, which enters the power input terminals 1 and 2 of the bridge rectifier U1 (the higher the input power voltage, the higher the output power voltage of the transformer, and vice versa). The DC power output from pins 3 and 4 of the bridge rectifier U1 is filtered by capacitor C and then enters the power input terminals of the first voltage detection circuit, the second voltage detection circuit, the leakage current detection circuit, and the control circuit. The above circuits are powered on and can be carried by relevant personnel. After the power switch S1 is turned on, the wireless receiving circuit module U5 is powered on and operates. After the first voltage detection circuit is powered on, when the field voltage is lower than a certain level (e.g., lower than 235.4V according to GB / T12325-2008 standard), the power output from transformer T via pins 3 and 4 of bridge rectifier U1 is transmitted through adjustable resistor RP1. (The higher the resistance value of adjustable resistor RP1 is adjusted by the production technician, the larger its voltage drop, so that NPN transistor Q1 will conduct when the field voltage signal is relatively high, meaning the threshold voltage is set relatively high; the lower the resistance value of adjustable resistor RP1 is adjusted by the production technician, the smaller its voltage drop, so that NPN transistor Q1 will conduct when the field voltage signal is relatively low.) When the threshold voltage is set relatively low, the voltage is divided by resistor R1, and after being reduced and current-limited by resistor R2, the voltage at the base of NPN transistor Q1 is lower than 0.7V. NPN transistor Q1 is cut off and does not output a signal to the negative power input terminal of relay K1. When the voltage at the site is higher than a certain level (e.g., higher than 235.4V), the power output from transformer T through pins 3 and 4 of bridge rectifier U1 is divided by adjustable resistor RP1 and resistor R1, and after being reduced and current-limited by resistor R2, the voltage at the base of NPN transistor Q1 is higher than 0.7V. NPN transistor Q1 is turned on, and the collector outputs a low-level signal to the negative power input terminal of relay K1.After the second voltage detection circuit is powered on, when the field voltage is higher than a certain level (e.g., higher than 198V according to GB / T12325-2008 standard), the power output from transformer T via pins 3 and 4 of bridge rectifier U1 is divided by adjustable resistor RP2 (the larger the resistance value of adjustable resistor RP2, the larger its voltage division, so that NPN transistor Q2 will conduct when the field voltage signal is relatively high, i.e., the threshold voltage is set relatively high; the lower the resistance value of adjustable resistor RP2, the smaller its voltage division, so that NPN transistor Q2 will conduct when the field voltage signal is relatively low, i.e., the threshold voltage is set relatively low), resistor R3, and resistor R4, after voltage reduction and current limiting, the voltage entering the base of NPN transistor Q2 is higher than 0.7V. When NPN transistor Q2 is turned on, its collector outputs a low-level signal that enters the base of NPN transistor Q3. NPN transistor Q3 is turned off and does not output a signal to the negative power input terminal of relay K1. When the field voltage is lower than a certain level (e.g., below 198V), the power output from transformer T via pins 3 and 4 of bridge rectifier U1 is divided by adjustable resistors RP2 and R3, and then reduced by resistor R4. The voltage at the base of NPN transistor Q2 is lower than 0.7V, causing NPN transistor Q2 to turn off and its collector no longer outputs a low-level signal to the base of NPN transistor Q3. NPN transistor Q3, through resistor R5, receives a suitable forward bias voltage from pin 3 of bridge rectifier U1 and turns on. NPN transistor Q3 then outputs a low-level signal from its collector to the negative power input terminal of relay K1. In this new design, technicians can open the housing cover to adjust the resistance values ​​of adjustable resistors RP1 and RP2.

[0021] Figure 1 , 2 As shown in Figure 3, after the leakage detection circuit is powered on, when there is no leakage in the casing of the circuit breaker body B, the thyristor VS will not be triggered to conduct, and the collector of transistor Q4 will not output a low level. When there is leakage in the casing of the circuit breaker body B (voltage R7 reduces voltage and limits current), the thyristor VS will be triggered to conduct. The 12V power supply enters the base of transistor Q4 through the cathode of the thyristor VS and the resistor R8 reduces voltage and limits current. The collector of transistor Q4 conducts and outputs a low level to the negative power input terminal of relay K1.

[0022] Figure 1 , 2As shown in Figure 3, when the voltage at the site is too low, too high, or there is a leakage, the negative power input terminal of relay K1 is energized, and its control power input terminal and normally open contact terminal close. Consequently, the time control switch U3 and the wireless transmission circuit module U are energized. After the wireless transmission circuit module U is energized, since the two contacts under its transmission button D1 are pre-connected (equivalent to a person pressing the transmission button D1), it will transmit the first wireless closing signal. After the time control switch U3 is energized, its pins 3 and 4 will output power to the power input terminal of relay K2 at certain intervals (e.g., 30 seconds). After the relay K2 is energized, its control contact terminal and normally open contact terminal close. In this way, under its own function, the two contacts under its test button SY of the circuit breaker body B will close. Consequently, the circuit breaker body B will trip, and all electrical equipment will lose power and stop working. The wireless transmitting circuit module U transmits a wireless signal. Upon receiving this signal, the wireless receiving circuit module U5 outputs a high-level signal from pin 3, which is then fed into the power input terminal of buzzer B. Buzzer B then powers on and sounds an alarm, alerting personnel not present and indicating a power supply abnormality (buzzer B stops sounding after power switch S1 is turned off). Through the combined action of all these mechanisms, this new device can monitor the voltage data of the power supply area in real time. It outputs a signal to the control circuit when the voltage is too high or too low, and also when the circuit breaker body's casing leaks current. After receiving a control signal, the control circuit immediately sends an alarm signal to the receiving circuit near relevant personnel (such as management personnel in the office area), allowing them to promptly remind users of various electrical devices to turn off the power. After a period of time, the circuit breaker body automatically shuts off the main power supply (for example, a 30-second delay after a staff member reminds an office worker to turn off their computer to prevent a forced, sudden power shutdown). This system prevents computer data loss; it also automatically forces shutdown after a delay, preventing personnel from leaving the power supply on the equipment unattended, which could negatively impact power supply safety. Furthermore, it prevents damage to equipment caused by prolonged periods of excessively high or low voltage, and reduces the risk of electric shock from personnel touching the outer casing when it leaks. Additionally, it allows the input power to the circuit breaker body B to be switched off via the key power switch SK (the key power switch is switched off with the key, and the power switch SK is switched on before power is restored). This effectively prevents unauthorized personnel from closing the circuit breaker body during maintenance, thus avoiding electric shock accidents and achieving better safety.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-functional circuit breaker, comprising a key-operated power switch and a circuit breaker body, characterized in that, It also includes a first voltage detection circuit, a second voltage detection circuit, a leakage current detection circuit, a control circuit, a receiving circuit, and a rectifier circuit; the first voltage detection circuit, the second voltage detection circuit, the leakage current detection circuit, the control circuit, and the rectifier circuit are installed outside the outer casing of the circuit breaker body, while the receiving circuit is located at the management personnel end; the circuit breaker body is connected in series with the power supply via a key power switch; the power output terminal of the circuit breaker body is electrically connected to the power input terminal of the rectifier circuit, and the power output terminal of the rectifier circuit is electrically connected to the power input terminals of the first voltage detection circuit, the second voltage detection circuit, the control circuit, and the leakage current detection circuit; the signal output terminals of the first voltage detection circuit, the second voltage detection circuit, and the leakage current detection circuit are electrically connected to the signal input terminal of the control circuit, and the signal output terminal of the control circuit is electrically connected to the two contacts below the test button on the circuit breaker body.

2. The multifunctional circuit breaker according to claim 1, characterized in that, The first voltage detection circuit includes an adjustable resistor, a resistor, and an NPN transistor that are electrically connected. One end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the NPN transistor, and the other end of the first resistor is connected to the emitter of the NPN transistor.

3. The multifunctional circuit breaker according to claim 1, characterized in that, The second voltage detection circuit includes an adjustable resistor, a resistor, and an NPN transistor that are electrically connected. One end of the adjustable resistor is connected to one end of the first resistor, the other end of the adjustable resistor is connected to one end of the second resistor, one end of the third resistor is connected, the other end of the third resistor is connected to the base of the first NPN transistor, the collector of the first NPN transistor is connected to the other end of the first resistor and one end of the fourth resistor, the other end of the fourth resistor is connected to the base of the second NPN transistor, and the emitters of the two NPN transistors are connected to the other end of the second resistor.

4. The multifunctional circuit breaker according to claim 1, characterized in that, The leakage current detection circuit includes an electrically connected resistor, a silicon controlled rectifier (SCR), and a transistor. One end of the first resistor is connected to the control electrode of the SCR, the cathode of the SCR is connected to one end of the second resistor, the other end of the second resistor is connected to the base of the transistor, and the other end of the first resistor is connected to the housing of the circuit breaker body.

5. The multifunctional circuit breaker according to claim 1, characterized in that, The control circuit includes an electrically connected wireless transmitting circuit module, a time control switch, and a relay. The positive power input terminal of the first relay is connected to the control power input terminal. The normally open contact terminal of the first relay is connected to the positive power input terminal of the time control switch and the wireless transmitting circuit module. The power output terminal of the time control switch is connected to the power input terminal of the second relay. The negative power input terminal of the time control switch is connected to the negative power input terminal of the wireless transmitting circuit module.

6. The multifunctional circuit breaker according to claim 5, characterized in that, Two contacts under one of the wireless signal transmission buttons in the wireless transmission circuit module are connected together by a wire.

7. The multifunctional circuit breaker according to claim 1, characterized in that, The receiving circuit includes an electrically connected battery, a wireless receiving circuit module, and a buzzer. The two terminals of the battery and the power input terminals of the wireless receiving circuit module are connected respectively, and the power output terminal of the wireless receiving circuit module and the power input terminal of the buzzer are connected.

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