CN109510162B - Fault arc protection circuit breaker - Google Patents
Fault arc protection circuit breaker Download PDFInfo
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- CN109510162B CN109510162B CN201811442020.9A CN201811442020A CN109510162B CN 109510162 B CN109510162 B CN 109510162B CN 201811442020 A CN201811442020 A CN 201811442020A CN 109510162 B CN109510162 B CN 109510162B
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- 238000001514 detection method Methods 0.000 claims abstract description 76
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- 238000000034 method Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 10
- 238000010891 electric arc Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 4
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- 239000003990 capacitor Substances 0.000 description 2
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- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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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
- 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
- H02H1/0015—Using arc detectors
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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
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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Abstract
The invention discloses a fault arc protection circuit breaker, which comprises a shell, a tripping part and an electronic control part, wherein the tripping part and the electronic control part are arranged in the shell; the electronic control part is arranged at the rear end of the tripping part, the control board is positioned at the upper end in the shell, the arc detection coil is positioned at the lower end in the shell, and the arc detection coil is arranged adjacent to the control board up and down; the shell is provided with a live wire input end, a live wire output end and a zero wire terminal, wherein the live wire enters the shell from the live wire input end and passes through the electric arc detection coil to be output from the live wire output end, and the zero wire is connected into the shell from the zero wire terminal to supply power for the control board. According to the invention, the arc detection coil, the control board and the mechanical parts are arranged separately, so that the structural layout of the inside of the circuit breaker is optimized, the installation space is saved, and the time and the material cost are saved.
Description
Technical Field
The invention relates to the field of electric circuit protection equipment, in particular to a fault arc protection circuit breaker capable of bearing 63A current.
Background
It has been investigated that fires caused by electricity account for about 40% of all fires, and there has been an increasing trend in recent years. The electric fire generally refers to power lines of electric circuits, sockets, electric equipment and the like in houses, and the power lines are aged due to long-time high-load operation or poor electric connection exists, so that high temperature, electric arcs, electric sparks and the like occur to cause the fire.
The circuit breaker is an electric element capable of opening and closing a circuit according to preset conditions, and in the fault arc detection and processing process, the circuit breaking of the circuit with the fault arc by the circuit breaker is a common method for processing the fault arc, and the method can effectively reduce the possibility of fire disaster caused by the fault arc.
Patent publication number CN104282511B, name: the patent document of a digital-to-analog electronic miniature circuit breaker and an electrical system using the same discloses a double-piece circuit breaker which can realize selective protection of the electrical system against fault arcs and can be used in a combined and graded manner, but has the following defects:
1. the circuit breaker cannot be used in combination with other circuit breakers, and the flexibility is poor;
2. the circuit breaker is of a double-piece structure, and if a single piece of the circuit breaker is damaged, the circuit breaker is scrapped as a whole, so that more waste is caused.
In addition, the size of the arc fault protection circuit breaker with the rated current of 63A, which is manufactured by adopting the traditional method, is at least more than 1.5P, and the limited space of the installation guide rail of the power distribution cabinet can be met in the engineering site which is used in combination with the existing conventional single-piece (1P) circuit breaker, so that the operation space reserved for constructors is smaller, the installation difficulty is larger, and the time consumption is more. Because the conventional electric household fault protection circuit breaker comprises mechanical components for detecting electric arcs, controlling circuits and realizing circuit breaking, the internal structure is relatively complex, so that how to set the thickness of the electric household fault protection circuit breaker within a single range is a problem which is difficult to overcome by a person skilled in the art at present.
In view of this, there is a need for structural improvements in existing arc fault protection circuit breakers, while changing the installation habits of existing circuit breakers to address the above-described issues.
Disclosure of Invention
In order to solve the technical problems, the invention provides the fault arc protection circuit breaker, the arc detection coil, the control panel and the mechanical parts are arranged separately by adjusting the positions of the arc detection coil, the control panel and the mechanical parts, the internal structural layout of the circuit breaker is optimized, a live wire is input from the side of the circuit breaker and output from the bottom end of the circuit breaker, a zero line is input for supplying power, no zero line is output, the thicknesses of an electronic control part and a wiring part of the circuit breaker are obviously reduced, and the single circuit breaker can bear 63A of current and can be used in combination with the traditional circuit breaker, so that the circuit breaker is beneficial to saving the installation space and the material cost, simplifying the installation procedure and shortening the construction time.
In order to achieve the above object, according to one aspect of the present invention, there is provided a fault arc protection circuit interrupter including a housing, and a trip portion and an electronic control portion disposed in the housing,
the tripping part is connected in the circuit to be protected and is used for performing instantaneous action to control the circuit to be protected to be disconnected when detecting that a fault arc exists in the circuit to be protected;
the electronic control part comprises an arc detection coil and a control board, the control board is connected with the arc detection coil, the fault arc is detected through the arc detection coil, and when the fault arc is detected, the instantaneous action of the tripping part is controlled; the casing is a cuboid with a protruding structure at the front end, and the tripping part is arranged in the protruding structure;
the electronic control part is arranged at the rear end of the tripping part, wherein the control board is positioned at the upper end in the shell, the arc detection coil is positioned at the lower end in the shell, and the arc detection coil is arranged adjacent to the control board vertically;
the shell is provided with a fire wire input end, a fire wire output end and a zero wire terminal, the fire wire input end is arranged at the lower end of the side wall of the shell, the fire wire output end is arranged on the lower end face of the shell, the fire wire enters the shell from the fire wire input end and passes through the arc detection coil to be output from the fire wire output end, the zero wire terminal is arranged on the upper end face of the shell, and the zero wire is connected into the shell from the zero wire terminal to supply power for the control board.
Preferably, a part of the control board adjacent to the arc detection coil is provided with an arc notch, and a part of the arc detection coil is embedded in the arc notch.
Preferably, the control board comprises a main control circuit, an arc detection circuit, a zero crossing detection circuit, a tripping driving circuit and a power supply circuit which are connected with the main control circuit;
the main control chip in the main control circuit judges whether a fault arc exists according to the detection result of the arc detection circuit, and after the fault arc is detected, the main control chip sends a tripping signal to the tripping driving circuit at the zero crossing point moment according to the detection result of the zero crossing detection circuit, and the tripping driving circuit controls the instantaneous action of the tripping part;
the tripping driving circuit is connected with the tripping part, and when a tripping signal is received, the tripping part is controlled to instantaneously act so as to trigger the conventional circuit breaker to execute the action of opening the circuit;
the power supply circuit is connected with the zero line and is used for supplying power to the main control circuit, the electric arc detection circuit, the zero crossing detection circuit and the tripping driving circuit.
Preferably, the arc detection circuit comprises a voltage sampling circuit, an amplifying circuit, a filtering circuit and a follower which are sequentially connected, a sampling resistor in the voltage sampling circuit collects current signals and converts the current signals into voltage signals, the amplifying circuit, the filtering circuit and the follower sequentially amplify and filter the voltage signals, the voltage signals are finally sent to a main control chip through the follower, the main control chip discriminates fault arcs according to the voltage signals, and the trip driving circuit is controlled to act at zero crossing points after the fault arcs occur.
Preferably, the tripping part comprises a tripping coil and a tripping deflector rod connected with the tripping coil;
the tripping coil is connected with the tripping driving circuit, the internal current of the tripping coil changes along with the current in the tripping driving circuit, and when the current in the tripping coil reaches a threshold value, the contact on the tripping shift lever is attracted to further control the disconnection of the circuit to be protected.
Preferably, the system further comprises a data interface connected to the control board, wherein the data interface is used for setting a current threshold value of power failure and is used as a data uplink interface.
Preferably, the fault arc protection circuit breaker is a single-piece circuit breaker, and the maximum bearing current is 63A.
Preferably, the thickness of the control plate is not greater than 14mm.
Preferably, the fault arc protection circuit breaker further comprises a buckle, and the buckle is clamped at the lower end of the live wire input end on the shell.
In another aspect of the present invention, there is provided a multiple-piece circuit breaker including the fault arc protection circuit breaker as described above and a single-piece or double-piece circuit breaker connected thereto and used in cooperation therewith, the single-piece or multiple-piece circuit breaker being a circuit breaker capable of achieving a circuit breaking function.
Compared with the prior art, the invention has the beneficial effects that:
1) The invention optimizes the internal structural layout of the circuit breaker by adjusting the positions of the arc detection coil, the control board and the mechanical parts, and the live wire is input from the side of the circuit breaker and output from the bottom end of the circuit breaker, thereby obviously reducing the thicknesses of the electronic control part and the wiring part of the circuit breaker, and the single-piece circuit breaker can bear 63A current, thereby being beneficial to saving the installation space and saving the material cost. In addition, the fault arc protection circuit breaker provided by the invention is a single piece, so that the fault arc protection circuit breaker is not limited by size when being used in combination with a conventional circuit breaker.
2) The invention adopts zero line input power supply and zero line output, which can obviously save the time cost for installing the circuit breaker, and adopts the power supply mode of zero line input power supply to replace the wiring mode of zero line input and zero line output of the traditional circuit breaker, thereby changing the installation habit of the traditional circuit breaker and obviously simplifying the installation procedure of the circuit breaker under the condition of not changing the wiring of external equipment.
3) When the arc fault protection circuit breaker with the buckle is used in combination with a conventional circuit breaker, the lower end of the conventional circuit breaker can be shielded, the integral appearance of the circuit breaker is ensured to be uniform, and the appearance is ensured to be attractive.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not limit the application.
FIG. 1 is a perspective view of the housing of the present invention;
fig. 2 is a schematic diagram of external wiring of a circuit breaker according to a first embodiment of the invention;
fig. 3 is a schematic view of the internal structure of a circuit breaker according to a first embodiment of the present invention (shown rotated 90 degrees clockwise);
fig. 4 is a schematic circuit diagram of a circuit breaker in accordance with a first embodiment of the present invention;
fig. 5 is a main control circuit diagram of a circuit breaker according to an embodiment of the present invention;
FIG. 6 is a circuit diagram of an arc detection circuit of a circuit breaker in accordance with an embodiment of the present invention;
fig. 7 is a circuit diagram of zero crossing detection of a circuit breaker in accordance with an embodiment of the present invention;
fig. 8 is a trip driving circuit diagram of a circuit breaker according to an embodiment of the present invention;
fig. 9 is a power circuit diagram of a circuit breaker in accordance with the first embodiment of the present invention;
fig. 10 is a reference diagram of a usage state of the circuit breaker according to the first embodiment of the present invention;
fig. 11 is a perspective view of a circuit breaker according to a second embodiment of the present invention.
1, protecting a breaker by a fault arc; 2. a conventional circuit breaker; 3. a load; 4. a socket;
11. a housing; 12. a trip portion; 13. an electronic control section; 14. inputting a live wire; 15. outputting a live wire; 16. zero line input; 17. a buckle;
121. a trip coil; 122. a trip deflector rod;
131. a control board; 132. an arc detection coil; 133. a power module; 134. a main control circuit; 135. a trip driving circuit; 136. an arc detection circuit; 141. a live wire output wiring terminal; 161. zero line terminal.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Furthermore, in the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Example 1
The fault arc protection circuit interrupter 1 shown in fig. 1 includes a housing 11, and a trip portion 12 and an electronic control portion 13 disposed in the housing 11, specifically:
as shown in fig. 3 and 4, the trip portion 12 includes a trip coil 121 and a trip lever 122 connected thereto; a trip lever 122 is connected in the line to be protected, for instantaneous action to control the circuit breaker to open the line to be protected when a fault arc is detected in the line to be protected,
the electronic control section 13 includes an arc detection coil 132 and a control board 131, and referring to fig. 3, the control board 131 is connected to the arc detection coil 132, detects a fault arc through the arc detection coil 132, and controls the trip section 121 to operate instantaneously when the fault arc is detected; the shell 11 is a cuboid with a protruding structure at the front end, and the tripping part 12 is arranged in the protruding structure;
the electronic control part 13 is arranged at the rear end of the tripping part 12, wherein a control board 131 is arranged at the upper end in the shell 11, an arc detection coil 132 is arranged at the lower end in the shell 11 and is arranged adjacent to the control board 131 up and down;
as shown in fig. 2, a live wire input end, a live wire output end and a zero wire terminal are arranged on the shell 11, the live wire input end is arranged at the lower end of the side wall of the shell 11, the live wire output end is arranged on the lower end face of the shell 11, the live wire enters the shell 11 from the live wire input end and passes through the arc detection coil 132 to be output from the live wire output end, the zero wire terminal is arranged on the upper end face of the shell 11, and the zero wire is connected into the shell 11 from the zero wire terminal to supply power for the control board 131.
It should be noted that: since the zero line input 16 is only used for supplying power to the control board 131 for the fault arc protection circuit breaker, the maximum current is not more than 100mA, and therefore, in the setting of the wiring terminal, the principle is as follows: the live wire output wiring terminal 141 adopts the terminal that can bear more than 63A, ensure to satisfy rated current 63A requirement, and zero line binding post 161 adopts small-size terminal can, on the whole, the zero line of fault arc protection circuit breaker 1 only inputs and does not export, only need live wire input and pass electric arc detection coil 132 and pass the live wire output terminal output again after with outside zero line constitution 220 volt system power supply for the consumer, when waiting to protect circuit system and appearing fault arc, the coil induces the change of electric current, makes fault arc protection circuit breaker 1 carry out corresponding tripping operation.
As shown in fig. 3, the portion of the control board 131 adjacent to the arc detection coil 132 is provided with an arc gap, and a portion of the arc detection coil 132 is embedded in the arc gap.
As shown in fig. 4 and 5, the control board 131 includes a main control circuit 134, and an arc detection circuit 136, a zero-crossing detection circuit, a trip driving circuit 135 and a power supply circuit connected thereto;
the main control chip in the main control circuit 134 judges whether a fault arc exists according to the detection result of the arc detection circuit 136, and after the fault arc is detected, the main control chip sends a tripping signal to the tripping driving circuit 135 at the zero crossing point moment according to the detection result of the zero crossing detection circuit, and the tripping driving circuit 135 controls the contact on the tripping shifting lever 122 to suck so as to trigger the conventional circuit breaker to execute the action of opening the circuit;
the trip driving circuit 135 is electrically connected with the trip coil 121 of the trip portion 12, and when detecting that a fault arc exists in the circuit to be protected, the current in the trip coil 121 is controlled to change, so as to trigger the trip lever 122 to act, and thus trigger the conventional circuit breaker to execute the action of breaking the circuit;
and the power supply circuit is connected with the zero line and is used for supplying power to the main control circuit 134, the arc detection circuit 136, the zero crossing detection circuit and the tripping driving circuit 135.
In this embodiment, the main control chip adopts a low-power-consumption 32-bit MCU, and enters a low-power-consumption standby state when the processor is not in operation, and enters an operating state rapidly when the processor is in operation, so that the overall power consumption of the circuit breaker is lower, the circuit breaker is more environment-friendly, the main control chip has independent functions of an ADC, a DAC, a comparator and a logic floating point operation processing unit, and the MCU samples, analyzes and judges whether to send a trip signal to the trip driving circuit 135.
As shown in fig. 6, the arc detection circuit 136 includes a voltage sampling circuit, an amplifying circuit, a filtering circuit and a follower, which are sequentially connected, the voltage sampling circuit includes a sampling resistor R8 connected in parallel with the arc detection coil 132, the voltage sampling circuit collects a current signal through the sampling resistor and converts it into a voltage signal, and the amplifier U3C, the filtering circuit and the follower U3A sequentially amplify and filter the voltage signal, and finally transmit the voltage signal to the main control circuit 134 through the follower. The main control circuit 134 discriminates whether a fault arc exists according to the voltage signal, and controls the trip driving circuit 135 to drive the trip portion 12 to act at the zero crossing point moment detected by the zero crossing detection circuit after the fault arc occurs.
As shown in fig. 7, the zero-crossing detection circuit includes an optocoupler U4, wherein an input pin of a light emitting diode in the optocoupler U4 is connected with a power supply through a resistor R7, and an output end is grounded through R11; an input pin of an amplifier in the optical coupler U4 is connected with a 3.3V power supply through a resistor R6, and an output pin is grounded. The pin 4P 1.2 of the optical coupler U4 is connected with the PA1.2 of the main control circuit 134, and the acquired zero crossing signal is transmitted to the main control chip.
As shown in fig. 8, the trip driving circuit 135 mainly comprises an optocoupler U6, a rectifier bridge L5 and a thyristor Q1, when the trip driving circuit 135 receives a trip signal sent by the main control circuit 134, the optocoupler U6 works, an output triode of the optocoupler U6 is turned on, the control electrode level of the thyristor Q1 is set high, the thyristor Q1 is turned on, the voltage is shorted to the ground, an instantaneous heavy current is generated, and the trip coil 121 also pulls in the contactor to disconnect the circuit through the heavy current. The circuit has the advantages that the circuit has extremely short working response time, and the circuit safety can be well protected.
The trip coil 121 is electrically connected to the trip driving circuit 135, and its internal current follows the current change in the trip driving circuit 135, and when the current in the trip coil 121 reaches a threshold value, the trip lever 122 is pulled in to disconnect the circuit to be protected.
The fault arc protection circuit breaker provided in this embodiment is a single-piece circuit breaker, so the thickness of the control board 131 thereof is not greater than 14mm, and the maximum load current thereof is 63A.
The circuit breaker is also provided with a data interface connected to the control board 131, which is used for setting a current threshold value of power failure and serving as a data uplink interface.
As shown in fig. 9, the power circuit of the circuit breaker provided in this embodiment is preferably embedded in a PCB with a minimum AC-DC module U2 in the market, the thickness of the power circuit is not greater than 14mm, the AD-DC module U2, a chip mounting capacitor, a varistor, a thermistor, an i-inductor, an electrolytic capacitor and a filter circuit are combined to form the whole power circuit, the thickness of each element is within 9mm, the thickness requirement of 1P is met, and the space occupied by the whole PCB is smaller.
In summary, the live wire input 14 is a side input, and the neutral wire input terminal is disposed on the upper end surface inside the housing 11, which is favorable to reducing the size of the circuit breaker, and is different from the structure that the live wire of other arc detection devices is input and output from the lower side along with the live wire output terminal in the same direction, so as to reduce the internal wiring. The zero line input terminal only supplies power for the internal control system and the internal control components of the product, and the purpose of distinguishing the mode and being beneficial to zero line input of other arc detector devices is a detection circuit. The arc detection coil 132 is located in a lower portion adjacent to a separate space of the live output terminal 141. The live wire input 14 of the invention is connected with the live wire output terminal after passing through the arc detection coil, and the arc detection coil is fixed on the circuit board in a mode of being different from the arc detection coils of other arc detection devices in the position of a single space. Through the optimization of the internal structure, the arc detection coil 132, the tripping mechanism, the live wire output wiring terminal 141 of the PCB control board and the live wire output wiring terminal 161 of the PCB control board and the PCB 63A and the small-size zero line wiring terminal 161 can be well combined in a 1P space, and the size and the electrical requirements of a single-piece (1P) circuit breaker are met.
In addition, it should be noted that, adopt a zero line input as power supply, not only can save the operating space of wiring, still changed traditional circuit breaker and need connect the wiring mode of a zero line output in addition, it can to connect three routes to reduce by connecing four routes, under the condition of large-scale construction, not only can provide more operating space for the manual work, but also can show the installation step of simplifying the circuit breaker, be favorable to saving time cost.
In the application process, the embodiment is combined with a single conventional circuit breaker 2 (also can be a double circuit breaker), as shown in fig. 10, and under a single-phase 220V ac power supply system, a live wire is connected to the fault arc protection circuit breaker 1 after being connected out of the conventional circuit breaker 2, passes through the arc detection coil 132 and then is output to the socket 4 to supply power to the load 3. The zero line is connected to the position shown in fig. 2, the zero line is not connected out of the fault arc protection circuit breaker 1, the zero line input 16 is used for supplying power to the PCB control board, the maximum current is not more than 100mA, the live line output connecting terminal 141 adopts a terminal capable of bearing more than 63A, the rated current 63A is ensured to be met, the zero line input connecting terminal adopts a small-size terminal, in addition, the zero line of the fault arc protection circuit breaker 1 only needs to be connected into a structure design without output, and when the fault arc protection circuit breaker 1 is applied, the power can be supplied to electric equipment only by an alternating current 220V system formed by the live line and an external zero line after the live line passes through the coil, when a fault arc occurs in a circuit to be protected, the arc detection coil 132 senses the change of current, so that the fault arc protection circuit breaker 1 performs corresponding tripping action, and the tripping action triggers the circuit breaking operation of the conventional circuit breaker 2.
Example two
As shown in fig. 11, the circuit breaker is different from the first embodiment in that the circuit breaker further includes a buckle 17 for shielding the circuit breaker of other specifications, and the buckle 17 is clamped at the lower end of the live wire input 14 terminal.
The purpose of the clip 17 is to prevent dust effectively; on the other hand, it is used to shade the conventional circuit breaker 2 so as to make the overall appearance of the circuit breaker uniform and beautiful.
The foregoing is only one embodiment of the present invention, and it should be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.
In addition, it should be noted that:
reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (5)
1. A fault arc protection circuit breaker comprises a shell, a tripping part and an electronic control part which are arranged in the shell,
the tripping part is connected in the circuit to be protected and is used for performing instantaneous action to control the circuit to be protected to be disconnected when detecting that a fault arc exists in the circuit to be protected;
the electronic control part comprises an arc detection coil and a control board, the control board is connected with the arc detection coil, the fault arc is detected through the arc detection coil, and when the fault arc is detected, the instantaneous action of the tripping part is controlled; it is characterized in that the method comprises the steps of,
the casing is a cuboid with a protruding structure at the front end, and the tripping part is arranged in the protruding structure;
the electronic control part is arranged at the rear end of the tripping part, wherein the control board is positioned at the upper end in the shell, the arc detection coil is positioned at the lower end in the shell, and the arc detection coil is arranged adjacent to the control board vertically;
the shell is provided with a live wire input end, a live wire output end and a zero wire terminal, the live wire input end is arranged at the lower end of the side wall of the shell, the live wire output end is arranged on the lower end face of the shell, live wire enters the shell from the live wire input end and passes through the arc detection coil to be output from the live wire output end, the zero wire terminal is arranged on the upper end face of the shell, and a zero wire is connected into the shell from the zero wire terminal to supply power to the control board;
an arc notch is formed in the portion, adjacent to the arc detection coil, of the control board, and one portion of the arc detection coil is embedded in the arc notch;
the control board comprises a main control circuit, an arc detection circuit, a zero crossing detection circuit, a tripping driving circuit and a power supply circuit which are connected with the main control circuit;
the main control chip in the main control circuit judges whether a fault arc exists according to the detection result of the arc detection circuit, and after the fault arc is detected, the main control chip sends a tripping signal to the tripping driving circuit at the zero crossing point moment according to the detection result of the zero crossing detection circuit, and the tripping driving circuit controls the instantaneous action of the tripping part;
the tripping driving circuit is connected with the tripping part, and when a tripping signal is received, the tripping part is controlled to instantaneously act so as to control the circuit to be disconnected;
the power supply circuit is connected with the zero line and is used for supplying power to the main control circuit, the arc detection circuit, the zero crossing detection circuit and the tripping driving circuit;
the arc detection circuit comprises a voltage sampling circuit, an amplifying circuit, a filtering circuit and a follower which are sequentially connected, wherein a sampling resistor in the voltage sampling circuit collects a current signal and converts the current signal into a voltage signal, the amplifying circuit, the filtering circuit and the follower sequentially amplify and filter the voltage signal, the voltage signal is finally sent to a main control chip through the follower, the main control chip screens a fault arc according to the voltage signal, and the trip driving circuit is controlled to act at a zero crossing point moment after the fault arc occurs;
the tripping part comprises a tripping coil and a tripping deflector rod connected with the tripping coil;
the tripping coil is connected with the tripping driving circuit, the internal current of the tripping coil changes along with the current in the tripping driving circuit, and when the current in the tripping coil reaches a threshold value, a contact on a tripping deflector rod is attracted to control the disconnection of a circuit to be protected;
the system also comprises a data interface connected to the control board, wherein the data interface is used for setting a current threshold value of power failure and is used as a data uplink interface.
2. The arc fault protection circuit interrupter according to claim 1, wherein the arc fault protection circuit interrupter is a single-piece interrupter and has a maximum load current of 63A.
3. A fault arc protection circuit interrupter according to claim 2, wherein the thickness of the control plate is no greater than 14mm.
4. A fault arc protection circuit breaker according to any one of claims 1 to 3 further comprising a catch which is snap-fitted to the lower end of the live input on the housing.
5. A multiple-piece circuit breaker comprising a fault arc protection circuit breaker according to any one of claims 1 to 3 and a single-piece or double-piece circuit breaker connected thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442020.9A CN109510162B (en) | 2018-11-29 | 2018-11-29 | Fault arc protection circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442020.9A CN109510162B (en) | 2018-11-29 | 2018-11-29 | Fault arc protection circuit breaker |
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| Publication Number | Publication Date |
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| CN109510162A CN109510162A (en) | 2019-03-22 |
| CN109510162B true CN109510162B (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811442020.9A Active CN109510162B (en) | 2018-11-29 | 2018-11-29 | Fault arc protection circuit breaker |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713652A (en) * | 2019-01-16 | 2019-05-03 | 安徽升隆电气有限公司 | A kind of fault electric arc breaker |
| CN114551184B (en) * | 2022-03-03 | 2023-06-13 | 浙江习羽智能科技有限公司 | Intelligent release |
Citations (4)
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| KR20000053944A (en) * | 2000-05-12 | 2000-09-05 | 김천연 | Arc fault circuit interrupter and circuit breaker having the same |
| CN201345457Y (en) * | 2009-01-23 | 2009-11-11 | 浙江大学 | Plug used for air conditioner and provided with function of fault electric arc protection |
| DE102015217108A1 (en) * | 2014-09-18 | 2016-03-24 | Siemens Aktiengesellschaft | Low-voltage circuit breakers |
| CN108418173A (en) * | 2018-03-11 | 2018-08-17 | 宁波高新区天都科技有限公司 | A kind of arc-fault circuit interrupter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7009406B2 (en) * | 2003-04-24 | 2006-03-07 | Delphi Technologies, Inc. | Arc fault detector and method |
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|---|---|---|---|---|
| KR20000053944A (en) * | 2000-05-12 | 2000-09-05 | 김천연 | Arc fault circuit interrupter and circuit breaker having the same |
| CN201345457Y (en) * | 2009-01-23 | 2009-11-11 | 浙江大学 | Plug used for air conditioner and provided with function of fault electric arc protection |
| DE102015217108A1 (en) * | 2014-09-18 | 2016-03-24 | Siemens Aktiengesellschaft | Low-voltage circuit breakers |
| CN108418173A (en) * | 2018-03-11 | 2018-08-17 | 宁波高新区天都科技有限公司 | A kind of arc-fault circuit interrupter |
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