CN116207700A - Protection circuit of power consumption loop - Google Patents
Protection circuit of power consumption loop Download PDFInfo
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- CN116207700A CN116207700A CN202310132708.1A CN202310132708A CN116207700A CN 116207700 A CN116207700 A CN 116207700A CN 202310132708 A CN202310132708 A CN 202310132708A CN 116207700 A CN116207700 A CN 116207700A
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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
- H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
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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
- H02H3/08—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 current
- H02H3/10—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 current additionally responsive to some other abnormal electrical conditions
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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
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The application relates to a protection circuit of an electric loop, which comprises a first switch circuit, a second switch circuit, a control unit and an information acquisition unit; the on-off response time of the second switch circuit is shorter than the on-off response time of the first switch circuit. In a normal power utilization state, the first switch circuit is in a conducting state, and the second switch circuit is in an off state; the information acquisition unit acquires the electric parameters of the power utilization loop and transmits the electric parameters to the control unit; when the control unit judges that the power circuit fails according to the electric parameters, the control unit controls the first switch circuit to be disconnected and/or controls the second switch circuit to be connected. The protection circuit is characterized in that a first switch circuit is arranged on the power utilization main circuit, and a second switch circuit is arranged on a bypass of the power utilization main circuit, so that the purpose of ensuring that the power utilization circuit is cut off at high speed when the power utilization circuit fails and protecting a load or a human body is achieved.
Description
Technical Field
The application relates to the technical field of power protection, in particular to a protection circuit of a power circuit.
Background
With the development of the technical field of electricity management, the safe operation of an electricity utilization loop becomes a key research problem. In a typical power circuit, a circuit breaker (i.e., a switching circuit) is connected in series with a load (e.g., a lamp), and the circuit can be controlled in the power circuit by the circuit breaker to turn on and off the circuit. However, during the use process, if electricity consumption fails (for example, the failure includes electric leakage, short circuit, surge impact, etc.), damage is caused to the load in the electricity consumption loop. Especially, when the electricity leakage occurs in the electricity utilization circuit, the electric shock event of the human body is easy to occur. Therefore, in order to protect liabilities on the power circuit and to avoid human electric shock accidents, when the power circuit fails, the power circuit needs to be disconnected from the load side in time by the circuit breaker.
However, the current circuit breaker has relatively long turn-off control time (whether a mechanical circuit breaker or a permanent magnet circuit breaker, the turn-off action reaction time is in millisecond level), and cannot realize high-speed turn-off, so that the load or the human body cannot be protected in time when the power circuit breaks down.
Disclosure of Invention
Accordingly, it is necessary to provide a protection circuit for an electric circuit, which is capable of protecting a load or a human body in time when the electric circuit fails.
In order to achieve the above objective, an embodiment of the present application provides a protection circuit for an electric circuit, including a first switch circuit, a second switch circuit, a control unit, and an information acquisition unit; the on-off response time of the second switch circuit is shorter than that of the first switch circuit;
the first end of the first switch circuit is connected with the control unit, the second end of the first switch circuit is used for being connected with a power supply in the power utilization loop, and the third end of the first switch circuit is used for being connected with a live wire in the power utilization loop; the control unit is connected with the information acquisition unit;
the first end of the second switching circuit is connected with the control unit, the second end of the second switching circuit is connected between the third end of the first switching circuit and the load in the power utilization loop, and the third end of the second switching circuit is used for being respectively connected with a zero line in the power utilization loop and the load in the power utilization loop, or the third end of the second switching circuit is used for being grounded;
In the normal power utilization state, the first switch circuit is in a conducting state, and the second switch circuit is in an disconnecting state; the information acquisition unit acquires the electric parameters of the power utilization loop and transmits the electric parameters to the control unit; when the control unit judges that the power circuit fails according to the electric parameters, the control unit controls the first switch circuit to be disconnected and/or controls the second switch circuit to be connected.
In one embodiment, the control unit starts timing when judging that the power circuit fails according to the electrical parameter, and when the first timing time is longer than or equal to a first preset time length, the control unit controls the first switch circuit to be turned off and/or controls the second switch circuit to be turned on according to the electrical parameter when judging that the power circuit is still in a failure state;
when the first timing time is less than the first preset time, the control unit judges that the power circuit is recovered to be normal according to the electric parameters, and then the first switch circuit is maintained to be in a conducting state and the second switch circuit is maintained to be in an off state.
In one embodiment, a range of the current in the power consumption loop exceeding the safety current threshold is divided into a plurality of current intervals, a corresponding first preset duration is set for the current intervals, and the larger the current interval is, the shorter the first preset duration is.
In one embodiment, the control unit starts timing when controlling the second switch circuit to be turned on, and when the second timing time is longer than or equal to a second preset time, the control unit judges that the power circuit is still in a fault state according to the electric parameter, maintains the second switch circuit to be in a turned-on state and controls the first switch circuit to be turned off;
when the second timing time is smaller than the second preset time, the control unit judges that the power circuit is recovered to be normal according to the electric parameters, and then the second switch circuit is controlled to be disconnected, and the first switch circuit is maintained to be in a conducting state.
In one embodiment, the control unit controls the first switch circuit to be turned off when the electrical parameter is judged to be smaller than a first preset value and larger than a second preset value;
and when the control unit judges that the electrical parameter is larger than or equal to a first preset value, the first switch circuit is controlled to be disconnected and the second switch circuit is controlled to be connected.
In one embodiment, the control unit starts timing when judging that the electrical parameter is smaller than a first preset value and larger than a second preset value, and controls the first switch circuit to be turned off when the first timing time is longer than or equal to a first preset time length and the control unit judges that the electrical parameter is still smaller than the first preset value and larger than the second preset value;
The control unit starts timing when judging that the electrical parameter is greater than or equal to a first preset value, and controls the first switch circuit to be turned off and the second switch circuit to be turned on when judging that the electrical parameter is still greater than or equal to the first preset value when the first timing time is longer than or equal to the first preset time.
In one embodiment, when the control unit judges that the electrical parameter is greater than or equal to a first preset value, the control unit controls the second switching circuit to be turned on and starts to time, when the second time length is greater than or equal to a second preset time length, the control unit controls the first switching circuit to be turned off when the control unit judges that the electrical parameter is still greater than or equal to the first preset value;
when the second timing time is smaller than the second preset time, the control unit maintains the first switch circuit in a conducting state and controls the second switch circuit to be disconnected when judging that the electrical parameter is smaller than the second preset value.
In one embodiment, the number of the second switch circuits is at least two, wherein the third end of at least one second switch circuit is used for grounding;
the control unit controls all the second switch circuits to be conducted when controlling the second switch circuits to be conducted;
or alternatively
When the control unit controls the second switch circuits to be conducted, one of the second switch circuits is controlled to be conducted, and the second switch circuits are alternately controlled to be conducted in different control processes.
In one embodiment, the control unit records a first execution number for controlling the switching state of the first switch circuit, numbers the first execution number according to a time sequence to obtain a first sequence, and associates and corresponds the number in the first sequence with a corresponding electrical parameter;
the control unit records the second execution times for controlling the switching state of the second switch circuit, numbers the second execution times according to the time sequence to obtain a second sequence, and the numbers in the second sequence are associated and correspond to the corresponding electric parameters;
the control unit generates a safety evaluation report of the power utilization loop according to the first execution times, the first sequence, the electric parameters related to the first sequence, the second execution times, the second sequence and the electric parameters related to the second sequence according to a preset test period.
In one embodiment, the control unit includes a wireless module; the wireless module is used for wirelessly connecting with the service unit; the control unit transmits monitoring information to the service unit through the wireless module; the monitoring information at least comprises fault time information, fault position information, fault type information, serial number information of the first switch circuit, serial number information of the second switch circuit and control information.
One of the above technical solutions has the following advantages and beneficial effects:
the protection circuit provided by the embodiments of the application comprises a first switch circuit, a second switch circuit, a control unit and an information acquisition unit. The on-off response time of the second switch circuit is shorter than that of the first switch circuit, and in a normal power utilization state, the first switch circuit is in a conducting state, and the second switch circuit is in an off state. In the electricity utilization process, the information acquisition unit acquires the electric parameters of the electricity utilization loop and transmits the electric parameters to the control unit; when the control unit judges that the power circuit fails according to the electric parameters, the control unit controls the first switch circuit to be disconnected and/or controls the second switch circuit to be connected. The protection circuit is characterized in that a first switch circuit is arranged on the power utilization main circuit, and a second switch circuit is arranged on a bypass of the power utilization main circuit, so that the purpose of ensuring that the power utilization circuit is cut off at high speed when the power utilization circuit fails and protecting a load or a human body is achieved.
Drawings
Fig. 1 is a schematic structural diagram of a protection circuit according to an embodiment of the present application.
Fig. 2 is a schematic diagram of another structure of a protection circuit according to an embodiment of the present application.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In order to solve the problems that the circuit breaker in the prior art has relatively long disconnection control time, and cannot realize high-speed disconnection, so that the load 19 or a human body cannot be protected in time when a power circuit breaks down. As shown in fig. 1, a protection circuit of an electric loop is provided, which includes a first switch circuit 11, a second switch circuit 13, a control unit 15, and an information acquisition unit 17. The first switch circuit 11 is connected to the main circuit of the power circuit, and is used for controlling the on and off of the main circuit of the power circuit. In one example, the first switch circuit 11 is a mechanical circuit breaker or a permanent magnet circuit breaker, and the specific type of the first switch circuit 11 may be selected according to actual requirements, which is not limited herein. The second switch circuit 13 is provided at a bypass of the power consumption circuit for controlling on and off of the bypass of the power consumption circuit. Note that, the on-off response time period of the second switch circuit 13 is shorter than the on-off response time period of the first switch circuit 11, so that when the control command is simultaneously sent to the first switch circuit 11 and the second switch circuit 13, the second switch circuit 13 formulates the control command faster than the first switch circuit 11. The on-off response time length refers to the time length required by the switch circuit to respond to the control instruction after receiving the control instruction.
For this purpose, the on-off response time of the second switching circuit 13 is shorter than the on-off response time of the first switching circuit 11, and in one example, as shown in fig. 2, the second switching circuit 13 includes a first MOS transistor M1 and a second MOS transistor M2; the grid electrode of the first MOS tube M1 and the grid electrode of the second MOS tube M2 are connected with the control unit 15; the drain electrode of the first MOS tube M1 is connected with the third end of the first switch circuit 11, and the source electrode is connected with the source electrode of the second MOS tube M2; the drain electrode of the second MOS tube M2 is respectively connected with a power supply in the power utilization loop and a load 19 in the power utilization loop, or the drain electrode of the second MOS tube M2 is used for grounding. In one example, the MOS transistor may be an N-type MOS transistor or a P-type MOS transistor.
The specific connection relation of the protection circuit of the power consumption circuit is as follows: the first switch circuit 11 has a first end connected to the control unit 15, a second end for connecting to a live wire in the power loop, and a third end for connecting to a load 19 in the power loop. In one example, load 19 may be a light bulb, a television, a computer, a washing machine, or the like.
The first end of the second switch circuit 13 is connected to the control unit 15, the second end is connected between the third end of the first switch circuit 11 and the load 19 in the power consumption loop, the third end is used for connecting the zero line in the power consumption loop and the load 19 in the power consumption loop respectively, or the third end of the second switch circuit 13 is used for grounding.
The control unit 15 is connected to the first switch circuit 11, the second switch circuit 13, and the information acquisition unit 17, respectively. In one example, the control unit 15 may be a single chip microcomputer, a programmable logic control unit 15, or a system on a chip.
In the normal power utilization state, the first switch circuit 11 is in an on state, and the second switch circuit 13 is in an off state. At this time, the current starts from the live wire and flows back to the zero line through the first switch circuit 11 and the load 19, or the current starts from the zero line and flows back to the live wire through the load 19 and the first switch circuit 11, so as to form a main loop of the power utilization loop. The second switching circuit 13 constitutes a bypass of the power circuit, and in a normal power consumption state, the second switching circuit 13 is in an off state, and no current flows through the second switching circuit 13.
The information acquisition unit 17 acquires the electrical parameters of the power circuit and transmits the electrical parameters to the control unit 15. It should be noted that the electrical parameter collected by the information collecting unit 17 may be one or any combination of a current value, a voltage value, and an electromagnetic intensity. For example, when the electrical parameter is a current value, and when the current value is greater than the safe current threshold, it indicates that the power circuit is malfunctioning. And when the electric parameter is electromagnetic intensity and the electromagnetic intensity is larger than a safety electromagnetic intensity threshold value, the fault of the power utilization circuit is indicated. And when the electric parameter is a voltage value and the voltage value is larger than a safety voltage threshold value, the fault of the circuit is indicated.
In one example, the information acquisition unit 17 includes a leakage current detection unit. The leakage current detection unit has a first end connected to the control unit 15, a second end connected between the second end of the second switching circuit 13 and the load 19 in the power consumption loop, and a third end connected between the third end of the second switching circuit 13 and the load 19 in the power consumption loop. The leakage current detection unit is, but not limited to, a hall sensor unit and a fluxgate sensor unit. The leakage current detection unit detects the residual current at the load 19 side, and if the residual current is greater than a first preset safe current threshold value, the fault of the circuit is indicated.
It should be noted that the first preset safe current threshold value may be specifically set according to the actual leakage protection type of the product, where the leakage protection type product includes AC type, a type, B type, etc. products, and different first preset safe current threshold values may be designed for different leakage protection types. The AC type leakage protection product is mainly applied to a general alternating current circuit, the A type leakage protection product is mainly applied to an alternating current distribution line and a pulsating direct current distribution line, and the B type leakage protection product is mainly applied to the alternating current distribution line, the pulsating direct current distribution line and electric equipment for generating smooth direct current.
In some embodiments, for example, an AC-type leakage protection product is taken as an example, the first preset safety current threshold is set to 30mA according to CCC standard in china, that is, when the residual current is greater than 30mA, the fault of the power circuit is indicated; the first preset safe current threshold value is set to 10mA according to the CE standard requirement in Europe, and the first preset safe current threshold value is set to 6mA according to the UL standard requirement in Europe.
Similarly, the requirements of the leakage protection products of type a and type B on the setting of the first preset safe current threshold are not described in detail herein.
In one example, the information acquisition unit 17 further comprises a short circuit detection unit. The first end of the short circuit detection unit is connected with the control unit 15, the second end is connected with the second end of the second switch circuit 13, and the third end is connected with the second end of the leakage current detection unit. In one example, the short circuit detection unit is, but is not limited to: and a current transformer unit. In another example, the short circuit detection unit comprises a shunt resistor connected between the second terminal of the second switching circuit 13 and the load 19. The short circuit detection unit detects the branch current passing through the input load 19 side, and if the branch current is greater than a second preset safe current threshold value, the fault of the power circuit is indicated.
In particular, the second preset safe current threshold is specifically set according to the actual rated operating current, for example, in some embodiments, the second preset safe current threshold is set according to twice the rated operating current. More specifically, common rated operating currents include, but are not limited to, current values of 10A, 16A, 32A, 63A, 125A, etc., for example, when the rated operating current is set to 10A, the second preset safety current threshold is set to 20A, and when the branch current is greater than 20A, a short circuit fault occurs in the circuit loop. Similarly, when the rated operating current is other, the same is repeated, and a detailed description is not repeated here.
Of course, in other embodiments, the second preset safety current threshold is not limited to be set according to twice the rated working current according to the actual protection requirement, and may be other values greater than the rated working current, which are not described in detail herein.
In one example, the information acquisition unit 17 further includes a surge detection unit. The first end of the surge detection unit is connected with the control unit 15, the second end is connected with the first end of the first switch circuit 11, and the third end is connected with the third end of the second switch circuit 13. The surge detection unit is used for detecting electromagnetic intensity in an electricity utilization environment where the electricity utilization loop is located, for example, when lightning strikes the periphery of the electricity utilization loop, an electromagnetic field with extremely high intensity is generated, so that current or voltage of the electricity utilization loop is suddenly increased, surge current or surge voltage is generated, the surge detection unit can detect the surge current or the surge voltage of the electricity utilization loop in the current environment, if the current value of the electricity utilization loop is larger than a preset surge current threshold value, the existence of the surge current is indicated, and if the voltage value of the electricity utilization loop is larger than a preset surge voltage threshold value, the existence of the surge voltage is indicated, and when the surge current or the surge voltage exists, damage to a load 19 on a load side in the electricity utilization loop is easily caused.
In particular, in some embodiments, at least one of a varistor, a TVS tube, and a gas discharge tube may be used as a voltage detection device of the surge detection unit. The surge voltage threshold is not limited, and the surge voltage threshold may be set to be greater than the rated voltage threshold, for example, in some embodiments, the surge voltage threshold may be set to be greater than or equal to twice the rated voltage threshold, if the rated voltage threshold is 220V, the surge voltage threshold is greater than or equal to 440V (e.g. 470V), and if the voltage value of the power circuit is greater than 470V, the surge voltage is indicated.
It should be noted that the rated voltage threshold may be specifically set according to the actual electricity consumption situation, and the same is true for the surge voltage threshold.
Specifically, in some embodiments, at least one of a transformer, a shunt resistor, a TMR sensor, a hall sensor may be utilized as the current detection device of the surge detection unit. The inrush current threshold is not limited, for example, in some embodiments, the inrush current threshold may be set to 100 times the rated current threshold, for example, if the rated current threshold is 10A, the inrush current threshold is set to 1000A, and when the current value of the power circuit is greater than 1000A, the existence of an inrush current is indicated.
It should be noted that the rated current threshold value can be specifically set according to the actual electricity consumption situation, and the same is true for the surge current threshold value. When the control unit 15 determines that the electrical circuit has a fault (for example, the fault is a short circuit, a leakage current, lightning, etc.) according to the electrical parameter, the control unit 15 may individually control the first switch circuit 11 to be turned off, and cut off the main circuit of the electrical circuit, thereby cutting off the current of the load 19. The second switching circuit 13 can be controlled individually to be turned on to conduct the bypass of the circuit for conducting so that the current flows from the live wire, through the first switching circuit 11, through the second switching circuit 13, back to the neutral wire, or from the neutral wire, through the second switching circuit 13, through the first switching circuit 11, back to the neutral wire, or when the second switching circuit 13 is grounded, the current starts from the live wire, flows to the bottom end through the second switching circuit 13, thus cutting off the current of the load 19. The first switching circuit 11 may be controlled to be turned off and the second switching circuit 13 may be controlled to be turned on at the same time to cut off the bypass of the main circuit and the conduction circuit of the power consumption circuit.
Some faults in the power circuit may be transient faults, which may be recovered instantaneously, without disconnecting the main circuit of the power circuit. If the main circuit of the power consumption circuit is repeatedly disconnected for such a failure, the first switch circuit 11 and the second switch circuit 13 are burdened on the one hand, and the load 19 is inconveniently consumed. To solve this problem, in one example, the control unit 15 starts timing when the electrical circuit is judged to be faulty according to the electrical parameter, and when the first timing time is longer than or equal to a first preset time period, the control unit 15 controls the first switch circuit 11 to be turned off and/or controls the second switch circuit 13 to be turned on according to the electrical parameter when the electrical circuit is still in the faulty state; when the first timing duration is greater than or equal to the first preset duration, the control unit 15 determines that the power circuit is restored to be normal according to the electrical parameter, and maintains the first switch circuit 11 in the on state and maintains the second switch circuit 13 in the off state.
The control unit 15 uses the timing unit therein to perform timing, the control unit 15 acquires the electrical parameters of the first switch circuit 11 and the second switch circuit 13 in real time through the information acquisition unit 17, and when a fault is determined according to the electrical parameters at the current time, the control unit 15 controls the timing unit to start timing from the current time. In one example, the first preset time period is set according to a longest time period that can be loaded 19 or the human body resists the failure of the power consumption circuit, and the first preset time period is smaller than the longest time period. In one example, the first preset time period may be set according to an on-off response time period of the first switch circuit 11, and the first preset time period is smaller than the on-off response time period of the first switch circuit 11. In one example, the first preset time period may be set according to an on-off response time period of the second switch circuit 13, and the first preset time period is smaller than the on-off response time period of the second switch circuit 13.
When the power consumption loop leaks electricity, in order to ensure personal safety, the first preset time period setting should consider the time period that the human body can bear the leakage current, and the first preset time period setting should be lower than the human body bearing time period. In one example, a range of the current in the power consumption loop exceeding the safety current threshold is divided into a plurality of current intervals, a corresponding first preset duration is set for the current intervals, and the larger the current interval is, the shorter the first preset duration is. For example, the safety current threshold is 20A (amperes), and each time the safety current threshold is exceeded, the safety current threshold is divided into a current section, specifically, a current section of 20A-30A, a current section of 30A-40A, a current section of 40A-50A, and the like, the corresponding first preset duration corresponding to the current section of 20A-30A is 1 microsecond to 1 millisecond, the corresponding first preset duration corresponding to the current section of 30A-40A is 1 microsecond to 5 microseconds, and the corresponding first preset duration corresponding to the current section of 40A-60A is 1 microsecond to 2 microseconds.
If the fault of the power consumption circuit is continuously equal to or exceeds the first preset time period, the control unit 15 may only control the first switch circuit 11 to be turned off, directly cut off the main circuit of the power consumption circuit, the control unit 15 may also only control the second switch circuit 13 to be turned on, directly conduct the bypass of the power consumption circuit, and the control unit 15 may also simultaneously control the first switch circuit 11 to be turned off and the second switch circuit 13 to be turned on. However, if the failure of the power consumption circuit continues for not more than the first preset time period, the control unit 15 does not control the first switch circuit 11 and the second switch circuit 13, and the first switch circuit 11 maintains the on state and the second switch circuit 13 maintains the off state.
The first switch circuit 11 is located on the main circuit of the power-using circuit, so as to avoid the problem of power supply failure caused by the failure of the first switch circuit 11. In the embodiment controlling the second switch circuit 13 to be turned on, the first switch circuit 11 is controlled to mitigate damage to the first switch circuit 11 caused by frequent switching operations, and avoid accelerating the aging of the first switch circuit 11, by distinguishing between:
the control unit 15 starts timing when controlling the second switch circuit 13 to be turned on, and when the second timing time length is greater than or equal to the second preset time length, the control unit 15 determines that the power circuit is still in a fault state according to the electrical parameter, maintains the second switch circuit 13 in a turned-on state, and controls the first switch circuit 11 to be turned off. When the second timing duration is less than the second preset duration, the control unit 15 judges that the power circuit is recovered to be normal according to the electrical parameter, and controls the second switch circuit 13 to be disconnected and maintains the first switch circuit 11 to be in a conducting state.
When the fault duration of the power consumption circuit is equal to or exceeds a first preset duration, the control unit 15 controls the second switch circuit 13 to be conducted as a measure for temporarily avoiding damage to the load 19 or a human body, the control unit 15 controls the second switch circuit 13 to be conducted, controls the timing unit to start timing, counts the second timing duration, and acquires the electrical parameters of the first switch circuit 11 and the second switch circuit 13 in real time through the information acquisition unit 17 so as to judge whether the power consumption circuit is still in a fault state, and when the fault duration of the power consumption circuit is continuously equal to or exceeds a second preset duration, the control unit 15 controls the first switch circuit 11 to be disconnected, cuts off the main circuit of the power consumption circuit so as to eliminate risks caused by the fault to the load 19 or the human body, and the second switch circuit 13 forms double insurance, so that the response speed of cutting off the power supply is improved, and the power consumption safety is increased. When the fault of the power utilization circuit does not continue to exceed the second preset time period, the control unit 15 does not control the first switch circuit 11, maintains the first switch circuit 11 to be turned on, and controls the second switch circuit 13 to be turned off. It should be noted that, in the process of the timing unit timing the second timing duration, the first timing duration is still timed. In one example, the second preset time period is set according to a longest time period that can be loaded 19 or that a human body resists the failure of the power consumption circuit, the second preset time period is smaller than the longest time period, and a sum of the first preset time period and the second preset time period is smaller than the longest time period. In one example, the second preset duration may be set according to an on-off response duration of the first switch circuit 11, the second preset duration is smaller than the on-off response duration of the first switch circuit 11, and a sum of the first preset duration and the second preset duration is smaller than the on-off response duration of the first switch circuit 11. In one example, the second preset duration may be set according to an on-off response duration of the second switch circuit 13, the second preset duration is smaller than the on-off response duration of the second switch circuit 13, and a sum of the first preset duration and the second preset duration is smaller than the on-off response duration of the second switch circuit 13.
When the power consumption loop leaks electricity, in order to ensure personal safety, the first preset time period setting should consider the time period that the human body can bear the leakage current, and the first preset time period setting should be lower than the human body bearing time period. In one example, a range of the current in the power consumption loop exceeding the safety current threshold is divided into a plurality of current intervals, a sum value of a corresponding first preset duration and a corresponding second preset duration is set for the current intervals, and the larger the current intervals are, the shorter the first preset duration and the second preset duration are. For example, the safety current threshold is 20A (amperes), each time the safety current threshold is exceeded is divided into a current section, specifically, 20A-30A, 30A-40A, 40A-50A, and so on, the sum of the first preset time length and the second preset time length corresponding to the current section of 20A-30A is 1 microsecond to 1 millisecond, the sum of the first preset time length and the second preset time length corresponding to the current section of 30A-40A is 1 microsecond to 5 microseconds, and the sum of the first preset time length and the second preset time length corresponding to the current section of 40A-60A is 1 microsecond to 2 microseconds, wherein the distribution of the first preset time length and the second preset time length can be determined according to practical requirements, for example, the first preset time length is longer than the second preset time length, or the first preset time length is shorter than the second preset time length.
The protection of the first switch circuit 11 and the second switch circuit 13 and the flexibility of the circuit for cutting off can be increased through the timing duration, and the protection of the first switch circuit 11 and the second switch circuit 13 and the flexibility of the circuit for cutting off can be increased through the size of faults. In some cases, although the fault of the power consumption circuit occurs, the fault is not large enough to affect the load 19 or the human body, or is in a range acceptable by the load 19 or the human body, at this time, the power consumption circuit is not required to be disconnected, so that frequent control of on-off of the first switch circuit 11 and on-off of the second switch circuit 13 is avoided, and the service lives of the first switch circuit 11 and the second switch circuit 13 are shortened. In one example, the control unit 15 sends a service and maintenance signal to the outside (e.g., a worker computer, a service unit, etc.), alerting the worker to service and maintenance.
In this case, in one example, the control unit 15 controls the first switch circuit 11 to be turned off when it is judged that the electrical parameter is smaller than the first preset value and larger than the second preset value. The control unit 15 controls the first switch circuit 11 to be turned off and the second switch circuit 13 to be turned on when determining that the electrical parameter is greater than or equal to the first preset value. It should be noted that the first preset value is greater than the second preset value. In one example, the first preset value is set according to a limit acceptable to the load 19 or a human body, and the second preset value is 30% to 60% of the first preset value, for example, 40% of the first preset value, and 50% of the first preset value. The first preset value and the second preset value correspond to the type of the electric parameter, when the electric parameter is a current value, the first preset value and the second preset value are also current values, and when the electric parameter is electromagnetic intensity, the first preset value and the second preset value are also electromagnetic intensity. When the electrical parameter is between the second preset value and the first preset value, it is indicated that the fault is not large, which can be dealt with by controlling the first switching circuit 11 to be turned off. When the electrical parameter exceeds the first preset value, the fault is larger, and the damage to the load 19 or the human body is caused, so that the control unit 15 controls the first switch circuit 11 to be disconnected, the main circuit of the power consumption circuit and the second switch circuit 13 to be connected, and the bypass of the power consumption circuit is connected, thereby realizing double insurance and accelerating the response speed of cutting off the power supply.
The present application may also increase the protection of the first switching circuit 11 and the second switching circuit 13 and increase the flexibility of cutting off the electrical circuit by a combination of the above-described timing duration and the size of the fault.
In one example, the control unit 15 starts timing when determining that the electrical parameter is smaller than the first preset value and larger than the second preset value, and when the first timing is longer than or equal to the first preset time period, the control unit 15 determines that the electrical parameter is still smaller than the first preset value and larger than the second preset value, and then controls the first switch circuit 11 to be turned off. When the first timing duration is less than the first preset duration, the control unit 15 determines that the electrical parameter becomes less than the second preset value, and controls the first switch circuit 11 to be turned on.
The control unit 15 starts timing when the electrical parameter is determined to be greater than or equal to a first preset value, and when the electrical parameter is determined to be greater than or equal to the first preset time length during the first timing, the control unit 15 controls the first switch circuit 11 to be turned off and controls the second switch circuit 13 to be turned on when the electrical parameter is determined to be still greater than or equal to the first preset value. When the first timing duration is less than the first preset duration, the control unit 15 determines that the electrical parameter becomes less than the second preset value, and controls the first switch circuit 11 to be turned on and the second switch circuit 13 to be turned off.
In one example, the control unit 15 controls the second switch circuit 13 to be turned on and starts to count when the electrical parameter is determined to be greater than or equal to the first preset value, and controls the first switch circuit 11 to be turned off when the electrical parameter is determined to be still greater than or equal to the first preset value when the second count is greater than or equal to the second preset period. When the second timing duration is less than the second preset duration, the control unit 15 maintains the first switch circuit 11 in the on state and controls the second switch circuit 13 to be turned off when the electrical parameter is determined to be less than the second preset value.
To further improve the electrical safety performance, in one example, the number of second switch circuits 13 is at least two, wherein the third terminal of at least one second switch circuit 13 is used for grounding. For example, the number of the second switch circuits 13 is two, three or four, and the specific number can be determined according to practical needs, so as to enhance the safety function by arranging at least two second switch circuits 13 on the bypass, and avoid the risk that the power supply cannot be cut off due to damage of the second switch circuits 13 when only one second switch circuit 13 is arranged.
The first control mode is as follows: the control unit 15 controls all the second switch circuits 13 to be turned on when controlling the second switch circuits 13 to be turned on. The second control mode is as follows: the control unit 15 controls one of the second switch circuits 13 to be turned on when controlling the second switch circuits 13 to be turned on, and alternately controls the second switch circuits 13 to be turned on in different control processes, in other words, controls one of the second switch circuits 13 to be turned on when the second switch circuits 13 need to be controlled to be turned on when each time the power circuit fails, and the same second switch circuit 13 is used discontinuously.
In order to ensure that the second switching circuit 13 functions during the power cut-off, avoiding the risk of a slow response speed to the power cut-off due to a failure of the second switching circuit 13, the control unit 15 checks if the second switching circuit 13 fails, and if it checks that the second switching circuit 13 fails, a warning signal is issued. The warning signal includes at least the number information, the position information, and the fault type corresponding to the faulty second switch circuit 13. The control unit 15 may issue a warning signal to the mobile terminal, the computer terminal, or the service unit of the worker to remind the worker to perform maintenance. In one example, the control unit 15 sends a control instruction to the second switch circuit 13 when the power consumption circuit is not powered, and monitors whether the second switch circuit 13 responds to the control instruction to determine whether the second switch circuit 13 fails, and if not, the second switch circuit 13 fails.
In order to record the control situation of the control unit 15, the recorded data are used for analysis. In one example, the control unit 15 comprises a wireless module; the wireless module is used for wirelessly connecting with the service unit; the control unit 15 transmits the monitoring information to the service unit through the wireless module. The monitoring information includes at least failure time information, failure position information, failure type information, number information of the first switch circuit 11, number information of the second switch circuit 13, and control information. In one example, the control unit 15 transmits the monitoring information to the service unit through the wireless module at a fixed period. In one example, the fixed period is 7 days, 15 days, or 30 days.
In order to avoid damage to the power circuit caused by excessive current in the moment, in one example, the protection circuit of the power circuit further comprises a reactance protection unit. The reactance protection unit has a first end connected to the second end of the first switching circuit 11 and a second end connected to the third end of the second switching circuit 13. When the instantaneous current is too large, the reactance protection unit is used for absorbing part of the current so as to reduce the impact of the excessive instantaneous current on the power utilization loop.
In order to predict and early warn the safety performance of the switch circuit, the switch circuit with potential safety hazard is maintained in advance, and the potential safety hazard is eliminated before accidents do not occur. In one example, the control unit records a first execution number for controlling the switching state of the first switch circuit, numbers the first execution number according to a time sequence, obtains a first sequence, and associates and corresponds the number in the first sequence with a corresponding electrical parameter. The control unit records the second execution times for controlling the switching state of the second switch circuit, numbers the second execution times according to the time sequence to obtain a second sequence, and the numbers in the second sequence are associated and correspond to the corresponding electric parameters. The control unit generates a safety evaluation report of the power utilization loop according to the first execution times, the first sequence, the electric parameters related to the first sequence, the second execution times, the second sequence and the electric parameters related to the second sequence according to a preset test period.
It should be noted that, each time the control unit controls the switching state of the first switch circuit (from the off state to the on state, or from the on state to the off state), the control action is recorded, and the number (for example, the number is given in the form of 001, 002, 003 and … …) is given, and the number is associated with the electrical parameter that causes the state to be switched at this time, that is, the electrical parameter according to which the control unit controls at this time can be queried through the number.
Similarly, each time the control unit controls the second switching circuit to switch state (from off state to on state or from on state to off state), the control action is recorded, and the number (for example, the number is given in the form of 0001, 0002, 0003 and … …) is given, and the number is associated with the electrical parameter causing the state switching, that is, the electrical parameter according to which the control unit controls the current time can be queried through the number.
In one example, the control unit may estimate remaining service lives of the first and second switching circuits by analyzing the number of times the first and second switching circuits switch states. By analyzing the sequence of switching states of the first and second switching circuits and the associated electrical parameters, causes of the switching states of the first and second switching circuits and damage caused by the causes to the first and second switching circuits may be analyzed, thereby generating a safety assessment report of the power usage loop.
In one example, the reactance protection unit includes a reactance unit, a first resistor, a second resistor, and a capacitance unit. The first end of the reactance unit is respectively connected with the first ends of the live wire and the first resistor in the power utilization loop, and the second end is respectively connected with the second end of the first switch circuit 11 and the first end of the second resistor. The first end of the capacitor unit is connected with the second end of the first resistor, the second end of the capacitor unit is connected with the second end of the second resistor, and the third end of the capacitor unit is connected between the third end of the second switch circuit 13 and a zero line in the power utilization loop.
When the second switch circuit 13 is closed, the load 19 side is short-circuited, and the current of the power consumption loop rapidly flows to the second switch circuit 13, at this time, the reactance unit can absorb part of the current in the power consumption loop and release the absorbed current through the capacitance unit, so that the situation that the second switch circuit 13 is damaged due to overlarge current at the moment of closing and conducting is avoided, and the normal operation of the second switch circuit 13 can be effectively protected.
The protection circuit comprises a first switch circuit 11, a second switch circuit 13, a control unit 15 and an information acquisition unit 17. The on-off response time of the second switch circuit 13 is shorter than the on-off response time of the first switch circuit 11, and in a normal power utilization state, the first switch circuit 11 is in an on state, and the second switch circuit 13 is in an off state. In the power utilization process, the information acquisition unit 17 acquires the electric parameters of the power utilization loop and transmits the electric parameters to the control unit 15; the control unit 15 controls the first switch circuit 11 to be turned off and/or controls the second switch circuit 13 to be turned on when the failure of the power circuit is judged based on the electric parameter. The protection circuit is characterized in that a first switch circuit 11 is arranged on the power utilization main circuit, and a second switch circuit 13 is arranged on a bypass of the power utilization main circuit, so that the purpose of ensuring that the power utilization circuit is cut off at high speed when the power utilization circuit breaks down, and protecting a load 19 or a human body is achieved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. The protection circuit of the power utilization loop is characterized by comprising a first switch circuit, a second switch circuit, a control unit and an information acquisition unit; the on-off response time of the second switch circuit is shorter than that of the first switch circuit;
the first end of the first switch circuit is connected with the control unit, the second end of the first switch circuit is used for being connected with a live wire in the power utilization loop, and the third end of the first switch circuit is used for being connected with a load in the power utilization loop; the control unit is connected with the information acquisition unit;
The first end of the second switch circuit is connected with the control unit, the second end of the second switch circuit is connected between the third end of the first switch circuit and the load in the power utilization loop, and the third end of the second switch circuit is used for connecting a zero line in the power utilization loop and the load in the power utilization loop respectively, or the third end of the second switch circuit is used for grounding;
under the normal power utilization state, the first switch circuit is in a conducting state, and the second switch circuit is in an disconnecting state; the information acquisition unit acquires the electric parameters of the power utilization loop and transmits the electric parameters to the control unit; and when the control unit judges that the power utilization circuit fails according to the electric parameters, the control unit controls the first switch circuit to be disconnected and/or controls the second switch circuit to be connected.
2. The protection circuit of an electric circuit according to claim 1, wherein the control unit starts timing when the electric circuit is judged to be faulty according to the electric parameter, and controls the first switch circuit to be turned off and/or controls the second switch circuit to be turned on when the first timing time is longer than or equal to a first preset time period and the electric circuit is judged to be still in a fault state according to the electric parameter;
When the first timing duration is smaller than the first preset duration, the control unit judges that the power utilization loop is recovered to be normal according to the electric parameter, and the first switch circuit is maintained to be in a conducting state and the second switch circuit is maintained to be in a disconnecting state.
3. The protection circuit of an electric circuit according to claim 2, wherein a range of the current in the electric circuit exceeding a safety current threshold is divided into a plurality of current intervals, the corresponding first preset duration is set for the current intervals, and the larger the current intervals are, the shorter the first preset duration is.
4. The protection circuit of an electric circuit according to claim 2, wherein the control unit starts timing when controlling the second switching circuit to be turned on, and when the second timing time is longer than or equal to a second preset time period, the control unit determines that the electric circuit is still in a fault state according to the electric parameter, maintains the second switching circuit to be in a turned-on state, and controls the first switching circuit to be turned off;
and when the second timing time is less than a second preset time, the control unit judges that the power circuit returns to normal according to the electric parameter, and then controls the second switch circuit to be disconnected and maintains the first switch circuit to be in a conducting state.
5. The protection circuit of an electrical circuit according to claim 1, wherein the control unit controls the first switching circuit to be turned off when the electrical parameter is determined to be smaller than a first preset value and larger than a second preset value;
and when the control unit judges that the electric parameter is larger than or equal to the first preset value, the control unit controls the first switch circuit to be disconnected and controls the second switch circuit to be connected.
6. The protection circuit of an electric circuit according to claim 5, wherein the control unit starts timing when judging that the electric parameter is smaller than the first preset value and larger than the second preset value, and the control unit controls the first switch circuit to be turned off when judging that the electric parameter is still smaller than the first preset value and larger than the second preset value when the first timing is longer than or equal to a first preset time length;
the control unit starts timing when judging that the electric parameter is larger than or equal to the first preset value, and is longer than or equal to the first preset duration when the first timing time is longer than or equal to the first preset duration, and the control unit controls the first switch circuit to be turned off and the second switch circuit to be turned on when judging that the electric parameter is still larger than or equal to the first preset value.
7. The protection circuit of an electrical circuit according to claim 5, wherein the control unit controls the second switching circuit to be turned on and start timing when the electrical parameter is determined to be greater than or equal to the first preset value, and controls the first switching circuit to be turned off when the electrical parameter is determined to be still greater than or equal to the first preset value when the second timing time is greater than or equal to a second preset time;
when the second timing duration is smaller than a second preset duration, the control unit maintains the first switch circuit in a conducting state and controls the second switch circuit to be disconnected when judging that the electrical parameter is smaller than the second preset value.
8. The protection circuit for an electrical circuit according to any one of claims 1 to 7, wherein the number of second switching circuits is at least two, wherein a third terminal of at least one of the second switching circuits is for grounding;
the control unit controls all the second switch circuits to be conducted when controlling the second switch circuits to be conducted;
or alternatively
And when the control unit controls the second switch circuits to be conducted, one of the second switch circuits is controlled to be conducted, and the second switch circuits are alternately controlled to be conducted in different control processes.
9. The protection circuit for an electrical circuit according to claim 8, wherein,
the control unit records and controls the first execution times of the switching state of the first switch circuit, numbers the first execution times according to the time sequence to obtain a first sequence, and correlates and corresponds the numbers in the first sequence with the corresponding electric parameters;
the control unit records and controls the second execution times of the switching state of the second switch circuit, numbers the second execution times according to the time sequence to obtain a second sequence, and the numbers in the second sequence are associated and correspond to the corresponding electric parameters;
and the control unit generates a safety evaluation report of the power utilization loop according to the first execution times, the first sequence, the electric parameters related to the first sequence, the second execution times, the second sequence and the electric parameters related to the second sequence according to a preset test period.
10. A protection circuit for an electrical circuit according to any one of claims 1 to 7, wherein the control unit comprises a wireless module; the wireless module is used for wirelessly connecting with the service unit; the control unit transmits monitoring information to the service unit through the wireless module; the monitoring information at least comprises fault time information, fault position information, fault type information, serial number information of the first switch circuit, serial number information of the second switch circuit and control information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310132708.1A CN116207700A (en) | 2023-02-07 | 2023-02-07 | Protection circuit of power consumption loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310132708.1A CN116207700A (en) | 2023-02-07 | 2023-02-07 | Protection circuit of power consumption loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116207700A true CN116207700A (en) | 2023-06-02 |
Family
ID=86507306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310132708.1A Pending CN116207700A (en) | 2023-02-07 | 2023-02-07 | Protection circuit of power consumption loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116207700A (en) |
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2023
- 2023-02-07 CN CN202310132708.1A patent/CN116207700A/en active Pending
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