CN113488956B - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
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- CN113488956B CN113488956B CN202110699066.4A CN202110699066A CN113488956B CN 113488956 B CN113488956 B CN 113488956B CN 202110699066 A CN202110699066 A CN 202110699066A CN 113488956 B CN113488956 B CN 113488956B
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- circuit breaker
- load circuit
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- 238000001514 detection method Methods 0.000 claims abstract description 36
- 230000007935 neutral effect Effects 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H75/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism
- H01H75/02—Details
- H01H75/04—Reset mechanisms for automatically reclosing a limited number of times
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
Landscapes
- Breakers (AREA)
Abstract
The embodiment of the application provides a circuit breaker, which comprises a main switch and an electric control unit, wherein the electric control unit comprises a main control component, a voltage detection component and a switch control component; the voltage detection assembly and the switch control assembly are both in communication connection with the main control assembly; the voltage detection component is used for detecting the voltage of the load circuit; the main control component is used for acquiring the voltage of the load circuit detected by the voltage detection component, and sending a switching-off control signal to the switching control component when the voltage of the load circuit meets a preset switching-off condition; the switch control component is used for controlling the main switch of the circuit breaker to be disconnected when receiving the switching-off control signal. The circuit breaker in the embodiment of the application realizes overvoltage protection, undervoltage protection and the like, so that the protection function of the circuit breaker is more abundant, the safety of personnel can be protected, and the safety of electric appliances can be protected; meanwhile, the circuit breaker provided by the application does not need electromagnetic tripping to control the switch, and the weight and cost of the circuit breaker can be effectively reduced.
Description
Technical Field
The embodiment of the application relates to the technical field of circuit elements, in particular to a circuit breaker.
Background
In various electricity utilization environments, circuit breakers are indispensable devices for performing line switching and ensuring electricity utilization safety.
The traditional circuit breaker generally adopts an electromagnetic tripping mode, generally only has a switching-on and switching-off function, and the circuit breaker with a part of powerful functions has the functions of leakage protection, short-circuit protection and the like, has a single protection function, and cannot realize overvoltage, undervoltage and other protection.
Disclosure of Invention
The application provides a circuit breaker, which can solve the technical problems of single protection function and higher production cost of the traditional circuit breaker.
Specifically, the circuit breaker comprises a main switch and an electric control unit, wherein the electric control unit comprises a main control assembly, a voltage detection assembly and a switch control assembly; the voltage detection assembly and the switch control assembly are both in communication connection with the main control assembly;
The voltage detection component is used for detecting the voltage of the load circuit;
the main control component is used for acquiring the voltage of the load circuit detected by the voltage detection component, and sending a switching-off control signal to the switch control component when the voltage of the load circuit meets a preset switching-off condition;
the switch control component is used for controlling the main switch of the circuit breaker to be disconnected when the switch-off control signal is received.
According to the circuit breaker provided by the embodiment of the application, through adding the main control component, the voltage detection component and the switch control component, overvoltage protection, undervoltage protection and the like are realized, so that the protection function of the circuit breaker is more abundant, the safety of personnel can be protected, and the safety of electric appliances can be protected.
Drawings
Fig. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application;
Fig. 2 is a schematic diagram of a second circuit breaker according to an embodiment of the present application;
fig. 3 is a schematic diagram III of a circuit breaker according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application;
Fig. 5 is a schematic diagram of a circuit breaker according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. Furthermore, while the present disclosure has been described in terms of an exemplary embodiment or embodiments, it should be understood that each aspect of the disclosure can be practiced separately from the other aspects.
It should be noted that the brief description of the terminology in the present application is for the purpose of facilitating understanding of the embodiments described below only and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.
The terms "comprising" and "having" and any variations thereof in the description and claims are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed but may include other elements not expressly listed or inherent to such product or apparatus.
The term "component" as used in this disclosure refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the function associated with that element.
In various electricity utilization environments, circuit breakers are indispensable devices for performing line switching and ensuring electricity utilization safety. The traditional circuit breaker generally adopts an electromagnetic tripping mode, generally only has a switching-on and switching-off function, and the circuit breaker with a part of powerful functions has the functions of leakage protection, short-circuit protection and the like, has a single protection function, and cannot realize the protection functions of overvoltage, undervoltage and the like. Meanwhile, because the electromagnetic tripping structure is complex, the weight is heavy, and the production cost of the circuit breaker is high.
In order to solve the technical problems, the embodiment of the application provides the circuit breaker, wherein the main control component, the voltage detection component and the switch control component are added in the circuit breaker, so that overvoltage protection, undervoltage protection and the like are realized, the protection function of the circuit breaker is richer, and the safety of personnel and electric appliances can be protected; meanwhile, the circuit breaker provided by the application does not need electromagnetic tripping to control the main switch, and the weight and cost of the circuit breaker can be effectively reduced.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application. In one embodiment, the circuit breaker 10 includes: the main switch 100 and the electric control unit 200, wherein the electric control unit 200 comprises a main control component 201, a voltage detection component 202 and a switch control component 203; the voltage detection component 202 and the switch control component 203 are both in communication connection with the master control component 201.
Alternatively, the master control assembly 201 may employ a microcontroller MCU.
In an embodiment of the present application, the voltage detection component 202 is configured to detect a voltage of the load circuit; the main control component 201 is configured to obtain the voltage of the load circuit detected by the voltage detection component 202, and send a switching control signal to the switch control component 203 when the voltage of the load circuit meets a preset switching condition; the switch control component 201 is configured to control the main switch 100 to be turned off when the switch-off control signal is received.
In one possible implementation manner, when the voltage of the load circuit meets a preset overvoltage protection condition or an undervoltage protection condition, the voltage of the load circuit can be considered to meet a preset brake-off condition.
The voltage of the load circuit can be determined to meet the preset overvoltage protection condition when the voltage of the load circuit is greater than the preset overvoltage threshold value, i.e. the voltage of the load circuit is determined to meet the preset brake-off condition. Or when the voltage of the load circuit is lower than the preset undervoltage threshold, determining that the voltage of the load circuit meets the preset undervoltage protection condition, and determining that the voltage of the load circuit meets the preset brake-off condition.
In a possible embodiment, the electronic control unit 200 is connected to the main switch 100, and the switch control assembly 203 may be provided with a driving motor, and when the switch control assembly 203 receives the switch-off control signal, the driving motor may control the main switch 100 of the circuit breaker to be turned off.
In some embodiments, after the main switch 100 of the circuit breaker is controlled to be opened, if the main control component 201 obtains that the voltage of the load circuit detected by the voltage detection component 202 is recovered to be normal, a closing control signal may be sent to the switch control component 203, and the driving motor may control the main switch 100 of the circuit breaker to be closed.
According to the circuit breaker 10 provided by the embodiment of the application, through adding the main control component 201, the voltage detection component 202 and the switch control component 203, overvoltage protection, undervoltage protection and the like are realized, so that the protection function of the circuit breaker is more abundant, and the safety of personnel and electric appliances can be protected.
In an embodiment, the master control assembly 201 may be specifically configured to:
the voltage of the load circuit detected by the voltage detection component 202 is obtained, and when the voltage of the load circuit is greater than a preset overvoltage threshold value or the voltage of the load circuit is lower than a preset undervoltage threshold value, a switching-off control signal is sent to the switch control component 203 to control the main switch 100 of the circuit breaker 10 to be switched off, so that damage of the electric appliance due to overvoltage or undervoltage can be avoided.
In another embodiment, the master control assembly 201 may also be specifically configured to:
the voltage of the load circuit detected by the voltage detection component 202 is obtained, and when the frequency of the voltage of the load circuit lower than the preset undervoltage threshold value in the preset time period is larger than the preset frequency threshold value, a switching-off control signal is sent to the switch control component 203 to control the main switch 100 of the circuit breaker 10 to be switched off, so that repeated power-on of the electric appliance can be avoided, and the service life of the electric appliance can be prolonged.
In another embodiment, the master control assembly 201 may also be specifically configured to:
The voltage of the load circuit detected by the voltage detection component 202 is obtained, when the time period that the voltage of the load circuit is continuously lower than the preset under-voltage threshold value is longer than the preset time period threshold value, a switching-off control signal is sent to the switch control component 203 to control the main switch 100 of the circuit breaker 10 to be switched off, so that the electric appliance can be prevented from being in an under-voltage state for a long time, and the electric appliance can be effectively protected from being damaged.
Based on the description of the foregoing embodiments, referring to fig. 2, fig. 2 is a schematic diagram of a circuit breaker according to the embodiment of the present application.
In one embodiment, the circuit breaker 10 includes: the main switch 100 and the electric control unit 200, wherein the electric control unit 200 comprises a main control assembly 201, a voltage detection assembly 202, a switch control assembly 203 and a current transformer 204; the voltage detection component 202, the switch control component 203 and the current transformer 204 are all in communication connection with the master control component 201.
The current transformer 204 is used to detect the current on the live or neutral line in the load circuit.
The master control assembly 201 may also be used to: when the load circuit is in an under-voltage state, acquiring current on a live wire or a zero wire in the load circuit detected by the current transformer 204, and determining whether the number of running electric equipment in the load circuit is larger than a preset number threshold value based on the current on the live wire or the zero wire in the load circuit; and when the number of the running electric equipment in the load circuit is larger than a preset number threshold value, sending a switching control signal to the switch control component 203.
It will be appreciated that the more consumers there are, the greater the current on the live or neutral line, and therefore the number of consumers in the load circuit that are running can be determined from the current on the live or neutral line.
When the load circuit is in an under-voltage state, if no running electric equipment exists in the load circuit or the number of running electric equipment is smaller than or equal to the preset number threshold, the switching-out operation is not performed or the switching-out frequency is reduced.
In another embodiment, the current transformer 204 may also be used to detect leakage current between the hot and neutral wires in the load circuit.
The main control component 201 may also be configured to obtain the leakage current detected by the current transformer 204, and send a switching control signal to the switch control component 203 when the leakage current is greater than a preset leakage current threshold value, so as to implement leakage protection.
In another embodiment, the current transformer 204 may also be used to detect current on the hot or neutral line in a load circuit.
The main control component 201 may also be configured to obtain a current on a live wire or a zero wire in the load circuit detected by the current transformer, and send a switching control signal to the switch control component 203 when the current on the live wire or the zero wire is greater than a preset overcurrent threshold, so as to implement overcurrent protection.
In an embodiment, the switch control assembly 203 is provided with a driving motor 2031, and the driving motor 2031 is connected to the main switch 100 of the circuit breaker 10, and when the switch control assembly 203 receives the above-mentioned switching control signal, a driving instruction is sent to the driving motor 2031, so as to control the driving motor 2031 to turn off the main switch 100 of the circuit breaker 10.
The main switch 100 has a spring therein, so that when the switch is opened, only the driving motor 2031 is required to slightly rotate, so that the switch can be opened quickly.
According to the circuit breaker 10 provided by the embodiment of the application, through adding the main control component 201, the voltage detection component 202, the current transformer 204 and the switch control component 203, overvoltage protection, undervoltage protection, overcurrent protection, leakage protection and the like are realized, so that the protection function of the circuit breaker is more abundant, the safety of personnel can be protected, and the safety of an electrical appliance can be protected; meanwhile, the circuit breaker 10 provided by the application controls the switch in a motor driving mode, and electromagnetic tripping is not needed, so that the weight and cost of the circuit breaker can be effectively reduced.
Based on the description of the foregoing embodiments, referring to fig. 3, fig. 3 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application.
In one embodiment, the circuit breaker 10 includes: the main switch 100 and the electric control unit 200, wherein the electric control unit 200 comprises a main control component 201, a voltage detection component 202, a switch control component 203 and a temperature sensor 205; the voltage detection assembly 202, the switch control assembly 203, and the temperature sensor 205 are all communicatively coupled to the master control assembly 201.
The temperature sensor 205 is used for detecting a temperature value of an area where the connection terminal of the circuit breaker 10 is located.
The main control component 201 may also be configured to obtain a temperature value of an area where the connection terminal of the circuit breaker 10 detected by the temperature sensor 205 is located, and send a brake-off control signal to the switch control component 203 when the temperature value is greater than a preset temperature threshold, so as to implement an over-temperature protection function, and avoid fire caused by overheating of the connection terminal under the condition of high air temperature.
Alternatively, the temperature sensor 205 may be an NTC thermistor provided on a terminal of the circuit breaker 10.
In an embodiment, the switch control assembly 203 is provided with a driving motor 2031, and the driving motor 2031 is connected to the main switch 100 of the circuit breaker 10, and when the switch control assembly 203 receives the above-mentioned switching control signal, a driving instruction is sent to the driving motor 2031, so as to control the driving motor 2031 to turn off the main switch 100 of the circuit breaker 10.
The main switch 100 has a spring therein, so that when the switch is opened, only the driving motor 2031 is required to slightly rotate, so that the switch can be opened quickly.
According to the circuit breaker 10 provided by the embodiment of the application, through adding the main control component 201, the voltage detection component 202, the temperature sensor 205 and the switch control component 203, overvoltage protection, undervoltage protection, over-temperature protection and the like are realized, so that the protection function of the circuit breaker is more abundant, the safety of personnel can be protected, and the safety of electric appliances can be protected; meanwhile, the circuit breaker 10 provided by the application controls the switch in a motor driving mode, and electromagnetic tripping is not needed, so that the weight and cost of the circuit breaker can be effectively reduced.
Based on the description of the foregoing embodiments, referring to fig. 4, fig. 4 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application.
In one embodiment, the circuit breaker 10 includes: the main switch 100 and the electric control unit 200, wherein the electric control unit 200 comprises a main control component 201, a voltage detection component 202, a switch control component 203, a current transformer 204 and a temperature sensor 205; the voltage detection assembly 202, the switch control assembly 203, the current transformer 204 and the temperature sensor 205 are all in communication connection with the master control assembly 201.
In one embodiment, the current transformer 204 is used to detect current on the hot or neutral line in the load circuit.
The master control assembly 201 is configured to: when the load circuit is in an under-voltage state, acquiring current on a live wire or a zero wire in the load circuit detected by the current transformer 204, and determining whether the number of running electric equipment in the load circuit is larger than a preset number threshold value based on the current on the live wire or the zero wire in the load circuit; and when the number of the running electric equipment in the load circuit is larger than a preset number threshold value, sending a switching control signal to the switch control component 203.
In another embodiment, the current transformer 204 may also be used to detect leakage current between the hot and neutral wires in the load circuit.
The main control component 201 may also be configured to obtain the leakage current detected by the current transformer 204, and send a switching control signal to the switch control component 203 when the leakage current is greater than a preset leakage current threshold value, so as to implement leakage protection.
In another embodiment, the current transformer 204 may also be used to detect current on the hot or neutral line in a load circuit.
The main control component 201 may also be configured to obtain a current on a live wire or a zero wire in the load circuit detected by the current transformer 204, and send a switching control signal to the switch control component 203 when the current on the live wire or the zero wire is greater than a preset overcurrent threshold, so as to implement overcurrent protection.
In another embodiment, the temperature sensor 205 is used to detect a temperature value of an area where the connection terminal of the circuit breaker 10 is located.
The main control component 201 may also be configured to obtain a temperature value of an area where the connection terminal of the circuit breaker 10 detected by the temperature sensor 205 is located, and send a brake-off control signal to the switch control component 203 when the temperature value is greater than a preset temperature threshold, so as to implement an over-temperature protection function, and avoid fire caused by overheating of the connection terminal under the condition of high air temperature.
According to the circuit breaker 10 provided by the embodiment of the application, through adding the main control component 201, the voltage detection component 202, the current transformer 204, the temperature sensor 205 and the switch control component 203, overvoltage protection, undervoltage protection, overcurrent protection, electric leakage protection, overtemperature protection and the like are realized, so that the protection function of the circuit breaker 10 is richer, the safety of personnel can be protected, and the safety of electric appliances can be protected; meanwhile, the circuit breaker 10 provided by the application controls the switch in a motor driving mode, and electromagnetic tripping is not needed, so that the weight and cost of the circuit breaker can be effectively reduced.
Based on the description of the foregoing embodiment, in an implementation manner, the main control assembly 201 further includes a user configuration interface, where the user configuration interface is configured to receive a configuration operation triggered by a user, and configure the protection parameters of the circuit breaker 10 according to the configuration operation.
The user configuration interface includes a wireless communication interface or a serial interface, such as bluetooth, USB serial interface, etc.
Illustratively, the protection parameters may include: at least one of an overvoltage threshold value of a load circuit, an undervoltage threshold value of the load circuit, a leakage current threshold value between a live wire and a zero wire in the load circuit, an overcurrent threshold value on the live wire or the zero wire in the load circuit and a temperature threshold value of an area where a connecting terminal of the circuit breaker is located.
Optionally, the above-mentioned overvoltage threshold value and undervoltage threshold value may also be fixed values, and no setting is required by the user.
In other words, in the embodiment of the present application, the user may configure the protection parameters of the circuit breaker 10 by using the user configuration interface, so that the application range of the circuit breaker 10 is wider.
Based on the description of the foregoing embodiments, referring to fig. 5, fig. 5 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application.
In one embodiment, the circuit breaker 10 includes: the main switch 100 and the electric control unit 200, wherein the electric control unit 200 comprises a main control component 201, a voltage detection component 202, a switch control component 203, a current transformer 204 and a temperature sensor 205; the voltage detection assembly 202, the switch control assembly 203, the current transformer 204 and the temperature sensor 205 are all in communication connection with the master control assembly 201.
The main switch 100 has a switch state feedback line, and the electronic control unit 200 further includes an ac/dc voltage step-down circuit 206, where the ac/dc voltage step-down circuit 206 is connected to the main control component 201 and the switch state feedback line, respectively.
In some embodiments, the ac/dc step-down circuit 206 is configured to determine the state of the main switch 100 when the main switch 100 is opened or closed, so as to ensure stable opening or closing of the main switch 100.
In some embodiments, the switch state feedback line is used to feedback the state voltage of the main switch 100 of the circuit breaker 10 to the ac-dc step-down circuit 206. The ac/dc step-down circuit 206 is configured to convert the status voltage fed back in the switch status feedback line into a switch status signal, and feed back the switch status signal to the main control component 201.
For example, the switch state feedback line may be output after being connected in series with a 100kQ resistor by using AC220V, and when the circuit breaker 10 is in the closed state, the feedback level of the switch state feedback line is AC220V; when the circuit breaker 10 is in the open state, the internal string resistor of the circuit breaker prevents electric shock, and the switch state feedback line has no feedback signal (open circuit).
The main control component 201 is further configured to determine a closed state of the main switch 100 of the circuit breaker 10 according to a switch state signal fed back by the ac/dc voltage step-down circuit 206.
In some embodiments, the electronic control unit 200 further comprises an AC-DC conversion circuit 207, the AC-DC conversion circuit 207 being connected to the master assembly 201 for providing a direct voltage to the master assembly 201.
In some embodiments, the electronic control unit 200 further comprises a user configuration interface 208, the user configuration interface 208 being configured to receive a user-triggered configuration operation and to configure the protection parameters of the circuit breaker 10 according to the configuration operation.
In some embodiments, the master control assembly 201 may employ a microcontroller MCU.
According to the circuit breaker 10 provided by the embodiment of the application, through adding the main control component 201, the voltage detection component 202, the current transformer 204, the temperature sensor 205 and the switch control component 203, overvoltage protection, undervoltage protection, overcurrent protection, electric leakage protection, overtemperature protection and the like are realized, so that the protection function of the circuit breaker is more abundant, the safety of personnel can be protected, and the safety of electric appliances can be protected; meanwhile, the circuit breaker 10 provided by the application controls the switch in a motor driving mode, and electromagnetic tripping is not needed, so that the weight and cost of the circuit breaker can be effectively reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (7)
1. The circuit breaker is characterized by comprising a main switch and an electric control unit, wherein the electric control unit comprises a main control assembly, a voltage detection assembly, a current transformer and a switch control assembly; the voltage detection assembly, the switch control assembly and the current transformer are all in communication connection with the main control assembly;
The voltage detection component is used for detecting the voltage of the load circuit;
the current transformer is used for detecting current on a live wire or a zero wire in the load circuit;
The main control component is used for acquiring the voltage of the load circuit detected by the voltage detection component and acquiring the current on the live wire or the zero wire in the load circuit detected by the current transformer so as to determine whether the number of running electric equipment in the load circuit is larger than a preset number threshold value based on the current on the live wire or the zero wire in the load circuit;
the main control component is also used for sending a switching control signal to the switch control component when the number of the running electric equipment in the load circuit is determined to be larger than a preset number threshold value and the voltage of the load circuit is determined to meet a preset under-voltage condition; the switch control component is used for controlling the main switch of the circuit breaker to be disconnected when receiving the switching-off control signal;
The main control component is also used for not acting on the main switch of the circuit breaker when the voltage of the load circuit meets the preset under-voltage condition and no running electric equipment exists in the load circuit;
The main control component is also used for determining that the voltage of the load circuit meets a preset under-voltage condition, and when the number of the running electric equipment in the load circuit is smaller than or equal to a preset number threshold value, the number of times that the switch control component turns off the main switch of the circuit breaker is preset;
The main control component is also used for sending the switching control signal to the switch control component when the frequency that the voltage of the load circuit is lower than the preset undervoltage threshold value in the preset time period is determined to be larger than the preset frequency threshold value and the number of the electric equipment running in the load circuit is determined to be larger than the preset number threshold value;
the main control component is also used for sending the switching control signal to the switch control component when the time length of the voltage of the load circuit, which is continuously lower than the preset undervoltage threshold value, is longer than the preset time length threshold value and the number of the running electric equipment in the load circuit is larger than the preset number threshold value.
2. The circuit breaker of claim 1, wherein the master control assembly is further configured to:
And acquiring the voltage of the load circuit detected by the voltage detection component, and sending a switching-off control signal to the switch control component when the voltage of the load circuit is larger than a preset overvoltage threshold value.
3. The circuit breaker according to claim 1, wherein,
The current transformer is used for detecting leakage current between a live wire and a zero wire in the load circuit;
The main control component is also used for acquiring the leakage current detected by the current transformer, and sending a brake-off control signal to the switch control component when the leakage current is larger than a preset leakage current threshold value.
4. The circuit breaker according to claim 1, wherein the current transformer is adapted to detect current on a live or neutral line in the load circuit;
the master control assembly is further configured to:
and acquiring the current on the live wire or the zero wire in the load circuit, which is detected by the current transformer, and sending a switching-off control signal to the switch control assembly when the current on the live wire or the zero wire is larger than a preset overcurrent threshold.
5. The circuit breaker of claim 1, wherein the electronic control unit further comprises a temperature sensor in communication with the master control assembly;
the temperature sensor is used for detecting the temperature value of the area where the wiring terminal of the circuit breaker is located;
the master control assembly is further configured to:
and acquiring a temperature value of an area where the connecting terminal of the circuit breaker is located, which is detected by the temperature sensor, and sending a switching-off control signal to the switch control assembly when the temperature value is greater than a preset temperature threshold.
6. The circuit breaker according to any one of claims 1 to 5, wherein the main control assembly comprises a user configuration interface for receiving a configuration operation triggered by a user and configuring protection parameters of the circuit breaker according to the configuration operation, wherein the protection parameters comprise at least one of an overvoltage threshold value of a load circuit, an undervoltage threshold value of the load circuit, an earth leakage current threshold value between a live wire and a zero wire in the load circuit, an over current threshold value on the live wire or the zero wire in the load circuit, and a temperature threshold value of an area where a terminal of the circuit breaker is located.
7. The circuit breaker of claim 1, wherein the switch control assembly comprises a drive motor coupled to the main switch of the circuit breaker, and wherein when the switch control assembly receives the pull-out control signal, a drive command is sent to the drive motor to control the drive motor to open the main switch of the circuit breaker.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113134A (en) * | 2013-04-22 | 2014-10-22 | 上海市电力公司 | Low-voltage large-load customized power adjustment and control method and intelligent electricity utilization device |
| CN108461361A (en) * | 2017-02-21 | 2018-08-28 | 北京维森科技有限公司 | Air switch and air switch control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102759672A (en) * | 2012-06-11 | 2012-10-31 | 浙江省电力公司 | Method for detecting states of control loops of electricity utilization collection terminals |
| GB2520961A (en) * | 2013-12-04 | 2015-06-10 | Eaton Ind Netherlands Bv | Automatic reclosing alternating current circuit breaker |
| CN206907722U (en) * | 2017-02-21 | 2018-01-19 | 北京维森科技有限公司 | Air switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113134A (en) * | 2013-04-22 | 2014-10-22 | 上海市电力公司 | Low-voltage large-load customized power adjustment and control method and intelligent electricity utilization device |
| CN108461361A (en) * | 2017-02-21 | 2018-08-28 | 北京维森科技有限公司 | Air switch and air switch control method |
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