CN216252274U - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
CN216252274U
CN216252274U CN202122964258.1U CN202122964258U CN216252274U CN 216252274 U CN216252274 U CN 216252274U CN 202122964258 U CN202122964258 U CN 202122964258U CN 216252274 U CN216252274 U CN 216252274U
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unit
circuit
circuit breaker
mcu
sampling resistor
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唐伟
段国艳
钟伟
王静
赖诚
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Sichuan Engineering Technical College
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Sichuan Engineering Technical College
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/242—Home appliances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

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Abstract

An embodiment of the present application discloses a circuit breaker, includes: the device comprises a sampling resistor, a switch unit, a drive control circuit, an MCU unit, a network connection unit and an electrical parameter detection unit; by adding the MCU unit and the network connection unit, the circuit breaker can be wirelessly connected with the terminal equipment through the network connection unit and controlled by the terminal equipment to realize non-contact remote operation, so that an operator is not required to perform field-contact operation, the technical problem that the operation efficiency of the circuit breaker is low due to the fact that the existing circuit breaker only adopts a mechanical structure is solved, and the technical effects of improving the operation efficiency and the operation safety are achieved.

Description

Circuit breaker
Technical Field
The application relates to the technical field of circuits, in particular to a circuit breaker.
Background
The low-voltage circuit breaker is an important product with the most complex structure and the highest technical content and economic value in a low-voltage electrical appliance. At present, the existing circuit breaker only adopts a mechanical structure, and when the circuit breaker is switched on, an operator is required to manually operate the circuit breaker on site, so that the operation efficiency is low.
The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
The main aim at of this application provides a circuit breaker, aims at solving current circuit breaker and only adopts mechanical structure, leads to the technical problem that circuit breaker operating efficiency is low.
To achieve the above object, an embodiment of the present application provides a circuit breaker, including:
the device comprises a sampling resistor RS, a switch unit, a drive control circuit, an MCU unit, a network connection unit and an electrical parameter detection unit;
the switch unit is used for connecting the main circuit;
the drive control circuit is electrically connected to the switch unit and is used for controlling the switch of the switch unit;
the sampling resistor RS is electrically connected with the main circuit;
the electrical parameter detection unit is used for collecting first voltages at two ends of the sampling resistor RS;
the signal output end of the electrical parameter detection unit is electrically connected with the MCU unit, and the electrical parameter detection unit is used for obtaining electrical parameters according to the first voltage and sending the electrical parameters to the MCU unit;
the MCU unit is electrically connected with the drive control circuit and is used for sending a control signal to the drive control circuit according to the electrical parameter;
the network connection unit is electrically connected with the MCU.
Optionally, the circuit breaker further includes an optical coupling unit, and the optical coupling unit is connected in series between the electrical parameter detection unit and the MCU unit.
Optionally, the switch unit includes an electric switch and an ac contactor, the electric switch is used for connecting the main circuit, and the ac contactor is electrically connected to the driving control circuit; the alternating current contactor is magnetically connected with the electric brake to control the switch of the electric brake.
Optionally, the MCU unit has a built-in clock circuit.
Optionally, the clock circuit is provided with a battery backup.
Optionally, the electrical parameter detection unit is an electrical energy metering unit, the electrical energy metering unit includes a first interface, and the electrical energy metering unit is connected in parallel with the sampling resistor through the first interface to collect first voltages at two ends of the sampling resistor.
Optionally, the main circuit is an ac circuit; the sampling resistor is connected to a zero line of the alternating current circuit; the electric energy metering unit further comprises a second interface, and the electric energy metering unit is respectively connected with the zero line and the live line of the alternating current circuit through the second interface so as to acquire a second voltage between the zero line and the live line of the alternating current circuit; the electric energy metering unit is further used for obtaining the electric parameter according to the first voltage and the second voltage.
Optionally, the network connection unit includes at least one of a WIFI transceiver unit, a bluetooth transceiver unit, and an infrared receiver unit.
Optionally, the power supply of the main circuit includes an isolation power supply and a non-isolation power supply, and the isolation power supply supplies power to the drive control circuit, the MCU unit, the network connection unit, and the optocoupler unit.
Optionally, the sampling resistor is an adjustable resistor.
Compared with the prior art, the embodiment of the application provides a circuit breaker has following beneficial effect: the circuit breaker is added with the MCU unit and the network connection unit, so that the circuit breaker can be wirelessly connected with the terminal equipment through the network connection unit and controlled by the terminal equipment to realize non-contact remote operation, the operation of field contact is not required to be carried out by an operator, the technical problem that the operation efficiency of the circuit breaker is low due to the fact that the existing circuit breaker only adopts a mechanical structure is solved, and the technical effects of improving the operation efficiency and the operation safety are achieved.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings that are needed in the detailed description of the present application or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a block diagram illustrating a circuit system of a circuit breaker according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating an internal circuit of an electric energy metering unit according to an embodiment of the present application;
fig. 3 is a schematic diagram illustrating an internal circuit of an optical coupling unit according to an embodiment of the present application;
fig. 4 is a schematic diagram illustrating an internal circuit principle of an MCU unit according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a clock circuit according to an embodiment of the present application;
fig. 6 is a schematic diagram illustrating a switching unit and a driving control circuit according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a non-isolated power supply circuit according to an embodiment of the present application;
fig. 8 is a schematic diagram illustrating an isolated power supply circuit according to an embodiment of the present application.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that all the directional indications (such as up, down, left, right, front, and back … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, if there is a description in this application referring to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
An embodiment of the present application provides a circuit breaker, include: the device comprises a sampling resistor, a switch unit, a drive control circuit, an MCU unit, a network connection unit and an electrical parameter detection unit; the switch unit is used for connecting the main circuit; the drive control circuit is electrically connected to the switch unit and is used for controlling the switch of the switch unit; the sampling resistor is electrically connected with the main circuit; the electrical parameter detection unit is used for collecting first voltages at two ends of the sampling resistor; the signal output end of the electrical parameter detection unit is electrically connected with the MCU unit, and the electrical parameter detection unit is used for obtaining electrical parameters according to the first voltage and sending the electrical parameters to the MCU unit; the MCU unit is electrically connected with the drive control circuit and is used for sending a control signal to the drive control circuit according to the electrical parameter; the network connection unit is electrically connected with the MCU.
In the embodiment, the MCU unit and the network connection unit are added, so that the circuit breaker can be wirelessly connected with the terminal equipment through the network connection unit and can be controlled by the terminal equipment to realize non-contact remote operation, the field-contact operation of operators is not needed, the technical problem that the operation efficiency of the circuit breaker is low because the existing circuit breaker only adopts a mechanical structure is solved, and the technical effects of improving the operation efficiency and the operation safety are achieved.
In one embodiment, the electrical parameter detection unit is an electrical energy metering unit, the electrical energy metering unit includes a first interface, and the electrical energy metering unit is connected in parallel with the sampling resistor through the first interface to collect a first voltage across the sampling resistor.
Further, the main circuit is an alternating current circuit; the sampling resistor is connected to a zero line of the alternating current circuit; the electric energy metering unit further comprises a second interface, and the electric energy metering unit is respectively connected with the zero line and the live line of the alternating current circuit through the second interface so as to collect a second voltage between the zero line and the live line of the alternating current circuit. The electric energy metering unit is further used for obtaining the electric parameter according to the first voltage and the second voltage. For the alternating current circuit, the electrical parameter is obtained according to the first voltage and the second voltage, the condition of the main circuit can be reflected more accurately, and therefore a more accurate control instruction is generated based on the electrical parameter, and more accurate switching control is achieved.
Specifically, referring to fig. 2, fig. 2 is a schematic diagram of an internal circuit principle of an electric energy metering unit, in the diagram, R16, R17, R19-R23 form a series circuit, and then are connected in parallel between two lines L2 and N2, and the voltage between R16 and N2 is taken as a detection voltage UsA voltage U between this voltage and L, N after closing of the switching unitLN(i.e., the second voltage) is proportional, and the proportional relationship is as follows:
Figure BDA0003380570930000051
Us＝K1ULN
in this embodiment, a core of a computing unit of the electric energy metering unit is a CS5463 chip, Us is accessed to a voltage sampling channel of the CS5463, and the chip automatically samples the Us and converts the Us into a digital signal, which is sent to the MCU unit through the optical coupling unit. The maximum voltage input in the voltage sampling channel is ± 250mV, and in this embodiment, the maximum voltage detection input channel is ± 100mV, so that the resistance value R16 is 1K Ω, R17 is 470K Ω, R19 is 470K Ω, R20 is 470K Ω, R21 is 470K Ω, R22 is 470K Ω, R23 is an adjusting resistance, C6, C9, and C10 are ampere-standard capacitors, which play a role of leakage protection, and at the same time, form an EMI anti-interference filter circuit with L5 and L6; in the circuit, Rs is a current sampling resistor, the material of the resistor is a manganese-copper alloy resistor, the maximum voltage on Rs is +/-250 mV, in the embodiment, Rs is 5m Ω, so the maximum current capable of being detected is 50A, and the minimum current is 1 mA.
Wherein Rs is a sampling resistor, in an optional implementation mode, the sampling resistor is an adjustable resistor, in a specific implementation process, the magnitude of current detection ranges from 1mA to 50A, and the resistance value of Rs can be adjusted according to the actual current flowing through. Therefore, the adjustable resistance enables the parameter range of the main circuit applicable to the circuit breaker to be wider.
The electrical parameter detection includes, but is not limited to, detection by using an electrical energy metering unit and a sampling resistor, and also includes a non-contact current detection method, such as eddy current detection.
In one embodiment, the circuit breaker further comprises an optical coupling unit, and the optical coupling unit is connected in series between the electric energy metering unit and the MCU unit. The optical coupling unit mainly plays a role in isolating alternating current strong current and direct current weak current, so that alternating current and direct current are isolated, and the purposes of safety and interference resistance are achieved. Because in this embodiment, electric energy metering unit connects the interchange forceful electric power, and the MCU unit belongs to the light current, and the intermediate junction opto-coupler unit can play and keep apart interchange forceful electric power and the weak electric effect of direct current, lets interchange and direct current keep apart, plays safe, anti-interference purpose.
Specifically, referring to fig. 3, in fig. 3, the circuit realizes that the signal output by the electric energy metering unit is transmitted to the MCU unit through the optocoupler unit, and the clock circuit built in the MCU unit generates a control clock, chip selection, command, and reset signal, and transmits the control clock, chip selection, command, and reset signal to the CS5463 chip. The power supply VCC of the optical coupling unit is 5V non-isolated power supply, the +5V is isolated DCDC power supply, the circuit schematic diagram of the optical coupling unit is shown in figure 3, and the detailed circuit is not described herein because the circuit schematic diagram is the existing optical coupling circuit.
Referring to fig. 5, fig. 5 provides a schematic diagram of a clock circuit principle for the present embodiment, and the MCU unit can obtain accurate time information through the clock circuit, and the time information can be used for recording occurrence time of power consumption time, fault, statistics, and other data. The main supply of the clock circuit is supplied by an isolated DCDC of 5V. In an alternative embodiment, the clock circuit is provided with a backup battery, which is supplied after the main power supply is powered off, and the model of the backup battery is CR 2025. The standby battery can ensure that the time of the clock circuit can be accurately continued in real time, and is convenient to control according to the time.
In one embodiment, the power supply of the main circuit includes an isolated power supply and a non-isolated power supply, and the isolated power supply supplies power to the driving control circuit, the MCU unit, the network connection unit, and the optocoupler unit. The isolation power supply supplies power to the MCU unit 6, the drive control circuit 7, the network connection unit 8 and the isolation side of the optical coupling unit 5.
Fig. 7 is a circuit schematic of a non-isolated power supply. The non-isolated power supply in the embodiment adopts a resistance-capacitance voltage reduction structure design, the collected voltage passes through a resistance-capacitance structure circuit, alternating current 220V is subjected to half-wave rectification, and direct current 5V is output through a DCDC circuit formed by an MP150, and the non-isolated power supply mainly comprises an electric energy metering unit and an optical coupling unit 5.
Fig. 8 is a circuit schematic of an isolated power supply. The isolation power supply in the example is a +5V isolation power supply module, the input of the module is 220V alternating current, the output of the module is direct current +5V, and the isolation power supply module mainly supplies power to the MCU, the isolation part of the optical coupler, the WIFI, the infrared circuit, the driving circuit and the real-time clock circuit. The power module has current output capacity up to 400mA, maximum power up to 2W, and module size of 30mm 16mm 19 mm.
In the embodiment, the strong current and the weak point part are respectively supplied with power by the non-isolated power supply and the isolated power supply, so that the safety of the whole circuit breaker is obviously improved.
In one embodiment, the switch unit includes an electric switch and an ac contactor, the electric switch is connected to the main circuit, and the ac contactor is electrically connected to the driving control circuit; the alternating current contactor is magnetically connected with the electric brake to control the switch of the electric brake.
Specifically, fig. 6 is a schematic diagram of a switching unit and a driving control circuit according to the present embodiment. When the MCU unit sends a low level to the drive control circuit, the normally open contact controlled by the drive control circuit is closed, the coil of the AC contactor is electrified, so that the AC contactor is switched on, an end L and an end SPILE in the figure are respectively connected with a live wire and one end of the coil of the contactor in front of the contactor in the main circuit, and the other end of the coil is connected with a zero line of the main circuit. The power supply of the drive control circuit adopts +5V isolation DCDC power supply.
In addition, fig. 4 is a schematic diagram of an internal circuit of an MCU unit provided in the embodiment, where the MCU unit in the embodiment is a microprocessor including, but not limited to, a single chip microcomputer based on an 8051 or ARM IP core. The 2 nd, 59 ~ 62, 64 th feet of microprocessor are connected the corresponding pin of opto-coupler, and the electric parameter data who gives the MCU unit through the opto-coupler unit from the electric energy metering unit can carry out teletransmission through the network connection unit (wifi in the picture for example) under the control of MCU unit. And the 26 pins are connected with a driving control circuit, when the pin outputs low level, a normally open contact of the driving control circuit is closed, a coil of the contactor is controlled to be electrified, and the contactor controls the switch to be switched on through a magnetic field. Pins 50-52 of the MCU unit are connected to corresponding pins of the real-time clock circuit. The power supply of the MCU unit is an isolation power supply DCDC which outputs 5V.
In addition, the MCU unit can also be preset with the existing control program, directly generates a control instruction according to the electric parameter data sent to the MCU unit from the electric energy metering unit through the optical coupling unit, and sends the control instruction to the drive control circuit so as to control the switch of the electric brake.
In one embodiment, the network connection unit includes at least one of a WIFI transceiving unit, a bluetooth transceiving unit, and an infrared receiving unit. The circuit breaker can be wirelessly connected with the terminal equipment through the network connection unit and is controlled by the terminal equipment to realize non-contact remote operation, so that an operator is not required to carry out field contact operation, the technical problem that the existing circuit breaker only adopts a mechanical structure to cause low operation efficiency of the circuit breaker is solved, and the technical effects of improving the operation efficiency and the operation safety are achieved. The non-contact control circuit breaker is switched on and off in practice, and can be controlled by adopting various methods, so that the limitation on control means is avoided, and the accident rate is reduced.
In addition, after the circuit breaker of this embodiment is connected with the terminal intelligent device through the network connection unit, can realize the automatic intelligent control to the circuit breaker through the control program in the current intelligent terminal, and specific control method can refer to current method, for example infrared remote control, and this application is no longer repeated.
To sum up, the circuit breaker of this application has following advantage through improving the back:
1. at present, the situation that a control circuit is not switched on and off under the non-contact condition is realized, a manual switching-on and switching-off mode is adopted, and the blank that a circuit breaker which can be integrated into modern intelligent home is not available at present is filled. Firstly, the circuit breaker can send instructions to control the switch to be switched on and off through external terminal equipment (infrared remote control equipment), and can be directly controlled under the condition that people are not in the field. Meanwhile, the circuit breaker is provided with the MCU unit, so that the circuit is automatically controlled to be switched on and off when abnormality is detected.
2. When the electrical parameters are detected, the electrical parameters can be sent to external equipment through a network connection unit arranged in the circuit, and the external equipment can record corresponding electrical parameters and acquire the power utilization trend of the equipment.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims (10)

1. A circuit breaker, comprising: the device comprises a sampling resistor, a switch unit, a drive control circuit, an MCU unit, a network connection unit and an electrical parameter detection unit;
the switch unit is used for connecting the main circuit;
the drive control circuit is electrically connected to the switch unit and is used for controlling the switch of the switch unit;
the sampling resistor is electrically connected with the main circuit;
the electrical parameter detection unit is used for collecting first voltages at two ends of the sampling resistor;
the signal output end of the electrical parameter detection unit is electrically connected with the MCU unit, and the electrical parameter detection unit is used for obtaining electrical parameters according to the first voltage and sending the electrical parameters to the MCU unit;
the MCU unit is electrically connected with the drive control circuit and is used for sending a control signal to the drive control circuit according to the electrical parameter;
the network connection unit is electrically connected with the MCU.
2. The circuit breaker of claim 1, further comprising an optocoupler unit connected in series between the electrical parameter detection unit and the MCU unit.
3. The circuit breaker according to claim 1, wherein the switching unit includes a switch for connecting the main circuit and an ac contactor electrically connected to the drive control circuit; the alternating current contactor is magnetically connected with the electric brake to control the switch of the electric brake.
4. The circuit breaker of claim 1, wherein the MCU unit has a built-in clock circuit.
5. The circuit breaker of claim 4, wherein the clock circuit provides a backup battery.
6. The circuit breaker of claim 1, wherein the electrical parameter detection unit is an electrical energy metering unit, the electrical energy metering unit including a first interface, the electrical energy metering unit being connected in parallel with the sampling resistor via the first interface to collect a first voltage across the sampling resistor.
7. The circuit breaker of claim 6, wherein the main circuit is an alternating current circuit; the sampling resistor is connected to a zero line of the alternating current circuit; the electric energy metering unit further comprises a second interface, and the electric energy metering unit is respectively connected with the zero line and the live line of the alternating current circuit through the second interface so as to acquire a second voltage between the zero line and the live line of the alternating current circuit; the electric energy metering unit is further used for obtaining the electric parameter according to the first voltage and the second voltage.
8. The circuit breaker of claim 1, wherein the network connection unit comprises at least one of a WIFI transceiver unit, a bluetooth transceiver unit, and an infrared receiver unit.
9. The circuit breaker according to claim 2, wherein the power supply of the main circuit includes an isolated power supply and a non-isolated power supply, the isolated power supply supplying power to the drive control circuit, the MCU unit, the network connection unit, and the optocoupler unit.
10. The circuit breaker of claim 1, wherein the sampling resistor is an adjustable resistor.
CN202122964258.1U 2021-11-29 2021-11-29 Circuit breaker Active CN216252274U (en)

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