An arc earth leakage protection circuit breaker

Abstract

A residual current circuit breaker (earth leakage protection) breaker has two fixed, and two moving contacts, 31,32, one pair respectively for breaking each of the live and neutral lines. The live and

Description

TECHNICAL FIELD The present invention relations to an arc earth leakage protection circuit breaker. 5 BACKGROUND TECHNOLOGY A circuit breaker is a switching device that can close, load and break the current under normal circuit conditions, and close, load and break the current under abnormal circuit conditions within a specified time. An arc fault detection device is designed as an 10 intelligent circuit protector, which can detect and identify arc fault and normal working arc in a circuit. It is used mainly to prevent fire hazards caused by bad contact and bad insulation in electrical arc fault. According to the Chinese Utility Model Patent CN202020089066.3, it discloses a 15 multi-functional circuit breaker, that comprises a housing, an implementing mechanism, a contact system, a protection mechanism, a trip unit and a testing mechanism, wherein the protection mechanism comprises a short-circuit protection component, an overload protection component, a leakage protection component arranged in the housing, wherein the protection mechanism also comprises an arc fault protection component 20 arranged in the housing, wherein the arc fault protection component comprises an inductor for detecting the arc fault, a main control board electrically connected with the inductor and a power board electrically connected with the main control board, wherein the power board is provided with a silicon-controlled switch for controlling the tripping mechanism to disconnect the circuit, wherein the inductor is in a shape of “I”, and at 25 least two inductors are provided, and wherein two ends of the housing are provided with an input wiring terminal and an output wiring terminal respectively, wherein a residual current transformer in the housing is arranged under the bottom of output wiring terminal, and wherein the residual current transformer is connected with a short-circuit protection component using a wire, and a middle part of the wire is wound on 30 the inductor forming an “8”-shaped pattern. The residual current transformer of the existing circuit breaker is located at the lower end of the output wiring terminal, and a 07 07 23 cover plate needs to be provided in the external of the circuit breaker for protection, which leads to high production cost and inconvenient assembly, in addition, the existing arc protection circuit breaker cannot disconnect the neutral wire, there will be some safety risks, and it also doesn’t meet the standard requirement of the mainstream market. 5 CONTENTS OF INVENTION Based on the above mentioned issues, this invention aims to provide an arc earth leakage protection circuit breaker with low production cost, high assembly efficiency and can disconnect a neutral wire and a live wire, and also it is convenient for 10 installation and connection. In respect of the above issues, the following technical scheme is provided: An arc earth leakage protection circuit breaker comprises a housing, an implementing mechanism, a contact system, a protection mechanism, an arc extinguishing mechanism, a trip unit 15 and a testing mechanism, wherein the protection mechanism comprises a short-circuit protection component, an overload protection component, a leakage protection component and arc fault protection component provided in the housing, wherein the arc fault protection component comprises an inductor for detecting an arc fault, a main control board electrically connected with the inductor and a power board electrically 20 connected with the main control board, wherein the power board is provided with a switch for controlling a tripping mechanism to disconnect the circuit, wherein at least two inductors are provided, and wherein two ends of the housing are provided with an input wiring terminal and an output wiring terminal respectively, wherein a residual current transformer in the housing is arranged on one side of the short-circuit protection 25 component toward the direction of the output wiring terminal, and wherein the residual current transformer is connected with the short-circuit protection component and the output wiring terminal using a first wire; wherein the contact system is equipped with two sets located on opposite sides inside of the housing, wherein a second wire is provided in the housing, wherein the implementing mechanism controls the two sets of 07 07 23 contact systems, each set of contact system is provided with independent moving contact and static contact, one set is located on the top of the second wire, and the other group is located on one side of the second wire; and wherein the two sets of contact systems respectively control the close and disconnection of a live wire and a neutral wire. In the above structure, the residual current transformer is arranged in the housing and located on the side of the short-circuit protection component, which can be quickly connected with the short-circuit protection component, and can reduce the residual current transformer to travel between the short-circuit protection component and the output wiring terminals, which is convenient assembly by workers and can save the arrangement for the cover plate, that improves the assembly efficiency and convenience and reduces the production cost of the invention. The implementing mechanism controls the contact or separation between the moving contact and the static contact of the two sets of contact systems, the live wire and the neural wire can be closed or disconnected at the same time, ensuring the reliability of power failure, thus improving the safety of this invention. This invention may be set in the following way: The residual current transformer is connected to the output wiring terminal means through the first wire and a middle part of the wire is wound on the inductor forming an “8”-shaped pattern. With the above structure, it can protect the coil in the short-circuit protection component in the case of short circuit and can improve the stability of the wire, thus improving the stability of the connection between the residual current transformer and the short-circuit protection component, thereby improving the reliability of this invention. This invention may be further set in the following way: One end of the second wire is electrically connected with one set of contact system, the other end is extended to the 07 07 23 outer housing toward one side of the output wiring terminal, wherein the input wiring terminal is electrically connected with another set of contact system used for connecting with the live wire. 5 With the above structure, by extending the connection end of the wire to the external housing, it is used to connect the neutral wire, so as to facilitate the assembly and connection of this invention improving the convenience of this invention. This invention may be further set in the following way: An arc extinguishing 10 mechanism comprises an arc chute located in the housing, wherein a wire channel is provided under the arc chute in the housing, wherein an outlet is provided under the output wiring terminal in the outer side of the housing, wherein the outer end of the second wire is threaded through the wire channel to the outlet toward to the outer side of the housing. 15 With the above structure, it can facilitate the positioning and assembly of the wire and set the limit for the wire improving the stability of the wire, thereby improving the convenience of assembly and the reliability of this invention. 20 This invention may be further set in the following way: Where the second wire is located at a position in correspondence with the contact system is provided with a magnetic avoiding element. In the above structure, the implementing mechanism controls the contact or separation 25 between the moving contact and the static contact of the two sets of contact systems, the live wire and the neural wire can be closed or disconnected at the same time making the contact system to generate a magnetic field. An arc extinguishing system also comprises a guide arc body on the upper side of the magnetic avoiding element. The magnetic field generated by the contact system is guided to the arc chute through the 07 07 23 guide arc body to carry out the arc extinguishing; The magnetic field generated by the wire can be separated from the magnetic field generated by the contact system by setting the magnetic avoiding element. The magnetic field generated by the wire is avoiding from causing the disorder of the magnetic field generated by the contact system during 5 the arc extinguishing system, ensuring the stability of the magnetic field generated by the contact system, and improving the safety and reliability of this invention. This invention may be further set in the following way: The first arc spraying nozzle is provided under the output wire terminal in the side wall of the housing, wherein the arc 10 chute toward one side of the output wire terminal in the housing is provided with an arc chamber, wherein the arc chamber is provided with an arc suppression plate, wherein a number of arc suppression plates are arranged along with the first arc spraying nozzle, forming a guide arc channel connected with the first arc spraying nozzle. 15 In the above structure, the arc in the arc chute rushed into the arc chamber is elongated through the guide arc channel, and the arc is blocked and weakened by the arc suppression plate, so as to reduce the strength of the arc from the first arc spraying nozzle, which improved the safety and reached the standard of the circuit breaker for this invention. 20 This invention may be further set in the following way: The bottom of the housing is provided with the second arc spraying nozzle connected with the arc chamber, wherein a number of the arc suppression plates are provided toward the second arc spraying nozzle, forming a plurality of arc suppression channel crisscrossed with the arc guide 25 channel, wherein the arc suppression plate is provided with a gap. In the above structure, the arc is further dispersed and elongated by setting the arc suppression channel with the guide arc channel, and is blocked with the arc suppression plate to weaken the arc, so as to further reduce the intensity of the arc from the first arc 07 07 23 spraying nozzle, and the second arc spraying nozzle, which improves the safety and reaches the standard of the circuit breaker for this invention. By setting the gap can facilitate between each channel dredging, realize the cutting arc, and it is easy for arc starting and arcing, which can reduce the strength of arc suppression plate, and further 5 improve the strength of arc suppression plate, and can further increase the arc path from the first arc spraying nozzle and the second arc spraying nozzle, effectively weaken the arc strength, thus improved the reliability and safety of this invention. This invention may be further set in the following way: A plurality of the second arc 10 spraying nozzle is arranged along the length direction of the housing. With the above structure, the electrical arc emitted by the second arc spraying nozzle can be further weakened, so that it tends to be zero, thus further improving the reliability and safety of this invention. 15 This invention may be further set in the following way: The arc extinguishing mechanism corresponding to the two sets of contact systems are provided with two groups, one group is located on the top of the second wire, the other group is located on one side of the second wire, the volume of the arc chute on one side of the wire is 20 greater than the volume of the arc chute on the top of the wire. With the above structure, the volume of the arc chute can be increased without affecting the overall volume of the invention, so as to improve the arcing effect of the arc chute and improve the reliability and service life of this invention. 25 DESCRIPTION OF FIGURES FIG. lisa view of a device according to the present invention; FIG. 2 is a view of an arc fault protection component of the present invention; FIG. 3 is a view inside the housing of the present invention; 07 07 23 FIG. 4 is a view of another side of the housing to the present invention. The name in the figures: 1-Housing; 2-Implementing Mechanism; 3-Contact System; 4-Arc Extinguishing Mechanism; 5-Short-Circuit Protection component; 6-Arc Fault 5 protection component; 61-Inductor; 62-Main Control Board; 63-Power Board; 11-Input Wiring Terminal; 12-Output Wiring Terminal; 13-Residual Current Transformer; 31-Moving Contact; 32-Static Contact; 7-Wire; 41-Arc Chute; 14-Wire Channel; 15-Outlet; 8-Magnetic Avoiding Element; 16-The first arc spraying nozzle; 17-Arc Chamber; 171-Arc Suppression Plate; 172-Guide Arc Channel; 18-The Second Arc Spraying Nozzle; 10 181-Arc Suppression Channel; 1711-Gap SPECIFIC WAYS OF IMPLEMENTING THE INVENTION The present invention will be further described with reference to the implementation examples and figures. The following implementation examples are used to illustrate this invention, but not limit the scope of this invention. What needs illustration is that all directional instructions of following implementing ways in this invention (such as up, down, left, right, front, behind, front and back......) is only used to explain in a specific posture (as shown in the drawings) under the relative position and motion of each component, if the specific posture is changed, then the 20 directional instructions also changed accordingly. An arc earth leakage protection circuit breaker as shown in FIG. 1-4, which comprises a housing(l), an implementing mechanism(2), a contact system(3), a protection mechanism, an arc extinguishing mechanism(4), a trip unit and a testing mechanism, 25 wherein the protection mechanism comprises a short-circuit protection component(5), an overload protection component, and a leakage protection component provided in the housing(l), wherein the protection mechanism also comprises arc fault protection component(6) provided in the housing(l), wherein the arc fault protection component(6) comprises an inductor(61) for detecting an arc fault, a main control board(62) 07 07 23 electrically connected with the inductor(61) and a power board(63) electrically connected with the main control board(62), wherein the power board(63) is provided with a silicon-controlled switch for controlling a tripping mechanism to disconnect the circuit, wherein the inductor(61) is in a shape of “I”, and at least two inductors are 5 provided, and wherein two ends of the housing(l) are provided with an input wiring terminal(ll) and an output wiring terminal(12) respectively, wherein a residual current transformer! 13) in the housing(l) is arranged on one side of the short-circuit protection component(5) toward the direction of the output wiring terminal! 12), and wherein the residual current transformer(13) is connected with the short-circuit protection 10 component(5) and the output wiring terminal(12) using a first wire; wherein the contact system(3) is equipped with two sets located on opposite sides inside of the housing, wherein a second wire(7) is provided in the housing, wherein the implementing mechanism(2) controls the two sets of contact systems, each set of contact system is provided with independent moving contact(31) and static contact(32), one set is located 15 on the top of the wire(7), and the other set is located on one side of the wire(7); and wherein the two sets of contact systems(3) respectively control the close and disconnection of a live wire and a neutral wire. In the above structure, the residual current transformer! 13) is arranged in the housing(l) 20 and located on the side of the short-circuit protection component(5), which can be quickly connected with the short-circuit protection component(5), and can reduce the residual current transformer(13) to travel between the short-circuit protection component(5) and the output wiring terminals! 12), which is convenient assembly by workers and can save the arrangement for the cover plate, that improves the assembly 25 efficiency and convenience and reduces the production cost of the invention. The implementing mechanism(2) controls the contact or separation between the moving contact(31)and the static contact(32) of the two sets of contact systems, the live wire and the neural wire can be closed or disconnected at the same time, ensuring the 07 07 23 reliability of power failure, thus improving the safety of this invention. This invention may be set in the following way: The residual current transformer(13) is connected to the output wiring terminal(12) means through the first wire and a middle 5 part of the wire is wound on the inductor(61) forming an “8”-shaped pattern. With the above structure, it can protect the coil in the short-circuit protection component(5) means in the case of short circuit and can improve the stability of the wire, thus improving the stability of the connection between the residual current 10 transformer(13) and the short-circuit protection component(5), thereby improving the reliability of this invention. This invention may be further set in the following way: One end of the wire (7) is electrically connected with one set of contact system (3), the other end is extended to 15 the outer housing (1) toward one side of the output wiring terminal (12), wherein the input wiring terminal (11) is electrically connected with another set of contact system (3) used for connecting with the live wire. With the above structure, by extending the connection end of the wire (7) to the external 20 housing (1), it is used to connect the neutral wire, so as to facilitate the assembly and connection of this invention improving the convenience of this invention. This invention may be further set in the following way: An arc extinguishing mechanism (4) comprises an arc chute (41) located in the housing (1), wherein a wire 25 channel (14) is provided under the arc chute (41) in the housing (1), wherein an outlet (15) is provided under the output wiring terminal (12) in the outer side of the housing (1), wherein the outer end of the wire (7) is threaded through the wire channel (14) to the outlet (15) toward to the outer side of the housing (1). 07 07 23 With the above structure, it can facilitate the positioning and assembly of the wire (7) and set the limit for the wire (7) improving the stability of the wire (7), thereby improving the convenience of assembly and the reliability of this invention. 5 This invention may be further set in the following way: Where the wire (7) is located at a position in correspondence with the contact system (3) is provided with an enveloping magnetic avoiding element (8). In the above structure, the implementing mechanism (2) controls the contact or 10 separation between the moving contact (31) and the static contact (32) of the two sets of contact systems (3), the live wire and the neural wire can be closed or disconnected at the same time making the contact system (3) to generate a magnetic field. An arc extinguishing system also comprises a guide arc body on the upper side of the magnetic avoiding element (8). The magnetic field generated by the contact system (3) is guided 15 to the arc chute (41) through the guide arc body to carry out the arc extinguishing; The magnetic field generated by the wire (7) can be separated from the magnetic field generated by the contact system (3) by setting the magnetic avoiding element (8). The magnetic field generated by the wire (7) is avoiding from causing the disorder of the magnetic field generated by the contact system (3)during the arc extinguishing system, 20 ensuring the stability of the magnetic field generated by the contact system (3), and improving the safety and reliability of this invention. This invention may be further set in the following way: The first arc spraying nozzle (16) is provided under the output wire terminal (12) in the side wall of the housing (1), 25 wherein the arc chute (41) toward one side of the output wire terminal (12) in the housing (1) is provided with an arc chamber (17), wherein the arc chamber (17) is provided with an arc suppression plate (171), wherein a number of arc suppression plates (171) are arranged along with the first arc spraying nozzle (16), forming a guide arc channel (172) connected with the first arc spraying nozzle (16). 07 07 23 In the above structure, the arc in the arc chute rushed into the arc chamber (17) is elongated through the guide arc channel (172), and the arc is blocked and weakened by the arc suppression plate (171), so as to reduce the strength of the arc from the first arc 5 spraying nozzle (16), which improved the safety and reached the standard of the circuit breaker for this invention. This invention may be further set in the following way: The bottom of the housing (1) is provided with the second arc spraying nozzle (18) connected with the arc chamber 10 (17), wherein a number of the arc suppression plates (171) are provided toward the second arc spraying nozzle (18), forming a plurality of arc suppression channel (181) crisscrossed with the guide arc channel (172), wherein the arc suppression plate (171) is provided with a gap (1711). 15 In the above structure, the arc is further dispersed and elongated by setting the arc suppression channel (181) with the guide arc channel (172), and is blocked with the arc suppression plate (171) to weaken the arc, so as to further reduce the intensity of the arc from the first arc spraying nozzle (16), and the second arc spraying nozzle (18), which improves the safety and reaches the standard of the circuit breaker for this 20 invention. By setting the gap (1711) can facilitate between each channel dredging, realize the cutting arc, and it is easy for arc starting and arcing, which can reduce the strength of arc suppression plate (171), and further improve the strength of arc suppression plate (171), and can further increase the arc path from the first arc spraying nozzle (16) and the second arc spraying nozzle (18), effectively weaken the arc strength, 25 thus improved the reliability and safety of this invention. This invention may be further set in the following way: A plurality of the second arc spraying nozzle (18) is arranged along the length direction of the housing (1). 30 With the above structure, the electrical arc emitted by the second arc spraying nozzle 07 07 23 (18) can be further weakened, so that it tends to be zero, thus further improving the reliability and safety of this invention. This invention may be further set in the following way: The arc extinguishing 5 mechanism (4) corresponding to the two sets of contact systems (3) are provided with two groups, one group is located on the top of the wire (7), the other group is located on one side of the wire (7), the volume of the arc chute (41) on one side of the wire (7) is greater than the volume of the arc chute (41) on the top of the wire (7). 10 With the above structure, this invention is controlled by the main control board (62), which can reduce the setting of the circuit board and increase the internal space of the housing (1), therefore, the volume of the arc chute can be increased without affecting the overall volume of the invention, so as to improve the arcing effect of the arc chute and improve the reliability and service life of this invention. 15 The above descriptions are only the preferred implementation mode of this invention. It should be pointed out that for an ordinary technical personnel in the technical field, some improvements and variants can be made on the premise without breaking away from the technical principle of this invention, and these improvements and variants 20 referred to above shall also be regarded as within the protection scope of this invention.

Claims

1. An arc earth leakage protection circuit breaker, comprising a housing (1), an implementing mechanism (2), two sets of contact systems (3), a protection mechanism, an arc extinguishing mechanism (4), a trip unit and a testing mechanism,wherein the protection mechanism comprises a short-circuit protection component (5), anoverload protection component, a leakage protection component and an arc fault protection component (6) provided in the housing, the arc fault protection component (6) comprises at least two inductors (61) for detecting arc faults, a main control board (62) electrically connected with the inductors and a power board (63) electrically connected with the main control board (62), the power board (63) is provided with a switch for controlling a trip mechanism to disconnect the circuit, an input wiring terminal (11) and an output wiring terminal (12) are respectively provided at two opposite ends of the housing (1), a residual current transformer (13) is arranged on one side of the short-circuit protection component (5) toward the direction of the output wiring terminal (12), and the residual current transformer (13) is connected with the short-circuit protection component (5) and the output wiring terminal (12) by a first wire; andwherein the two sets of contact systems (3) are located on opposite inner sides of the housing (1) and controlled by the implementing mechanism (2), each set of contact system (3) is independently provided with a moving contact (31) and a static contact (32), one set of contact system (3) is located above second wire (7) when the circuit breaker is in an upright configuration, and the other set of contact system (3) is located alongside the second wire (7), and the two sets of contact systems respectively control the close and disconnection of a live wire and a neutral wire.

2. The arc earth leakage protection circuit breaker according to claim 1, wherein the first wire from the residual current transformer (13) is wound on the at least two inductors (61) forming an "S' -shapcd pattern and then connected to the output wiring terminal (12).

3. The arc earth leakage protection circuit breaker according to claim 1 or 2, wherein one end of the second wire (7) is electrically connected with one set of contact system (3) and the other end protrudes from the side of the housing (1) on which the output wiring terminal (12) is provided, the input wiring terminal (11) is electrically connected with the other set of contact system (3) for controlling the live wire.

4. The arc earth leakage protection circuit breaker according to any one of the preceding claims, wherein tine arc extinguishing mechanism (4) comprises an arc chute (41) located in the housing, a wire channel (14) is provided adjacent the arc chute (41) in the housing, an outlet (15) is provided on the same side of the housing (1) as the output wiring terminal (12), wherein one end of the second wire (7) is threaded through the wire channel (14) to the outlet (15) and protrudes outside the housing (1).OJ ' Tlie arc earth leakage protection circuit breaker according to any one of the precedingclaims, wherein a portion of tire second wire (7) near the contact systems (3) is provided with a magnetic avoiding element (8).CMCM6. The arc earth leakage protection circuit breaker according to claim 4, wherein a first arc spraying nozzle (16) is provided on the same side of the housing (1) as the output wire terminal (12), an arc chamber (17) is disposed between the arc chute (41) and the side of the housing on which the output wire terminal (12) is provided , a plurality of arc suppression plates (171) are provided in the arc chamber (17) and arranged along with the first arc spraying nozzle (16), forming a guide arc channel (172) connected with the first arc spraying nozzle (16).

7. The arc earth leakage protection circuit breaker according to claim 6, wherein at least one second arc spraying nozzle (18) is provided on one edge of the housing (1) and connected with the arc chamber (17), a number of the arc suppression plates (171) are provided in the arc chamber (17) and arranged toward the second arc spraying nozzle (18), with a gap (1711)between two adjacent arc suppression plates (171). forming a plurality of arc suppression channels (181) crisscrossed with the arc guide channel (172).

8. The arc earth leakage protection circuit breaker according to claim 7, wherein a plurality of the second arc spraying nozzles are arranged along a length direction of the housing.

9. The arc earth leakage protection circuit breaker according to claim 4, wherein the arc extinguishing mechanism (4) is divided into two groups corresponding to the two sets of contact systems (3), one group is located above the second wire (7), the other group is located alongside the second wire (7), the volume of the arc chute on one side of the second wire is greater than the volume of the arc chute above the second wire, when the circuit breaker is in an upright configuration.xtCMCMCM

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