circuit breaker

Abstract

The application relates to the field of low-voltage electrical apparatus, in particular to a circuit breaker, wherein in a phase pole breaking unit, a phase pole rotating shaft mechanism is located at one side of an operating mechanism in the horizontal direction of the operating mechanism, and a phase pole arc extinguishing system and the phase pole rotating shaft mechanism are arranged side by side in the vertical direction of the operating mechanism; the phase pole arc extinguishing system comprises an arc leading piece, a main arc extinguishing chamber, an auxiliary arc extinguishing chamber, a main arc extinguishing chamber arc leading plate and an auxiliary arc extinguishing chamber arc leading plate; the circuit breaker has reasonable internal layout of the phase pole breaking unit, more design space is provided for the phase pole arc extinguishing system, and the arc extinguishing performance of the phase pole arc extinguishing system is good.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to a circuit breaker. Background Technology

[0002] With the continuous development of photovoltaic technology, the performance requirements of its power distribution system for molded case circuit breakers are gradually increasing, and at present, molded case circuit breaker products are constantly developing towards smaller size and higher performance.

[0003] To meet the high-voltage breaking requirements of DC1000V and DC1500V for molded case circuit breakers in photovoltaic power distribution lines, increasing the arc voltage of the arc-extinguishing chamber has become a common design method. However, traditional 250A molded case circuit breakers often have the following problems that affect the improvement of the arc voltage of the arc-extinguishing chamber:

[0004] 1. Its operating mechanism is a four- or five-bar linkage conversion structure. The rotation centers of the operating mechanism and the rotating shaft mechanism are arranged side by side along the vertical direction of the operating mechanism. This means that the arc-extinguishing chamber or arc-extinguishing system can only be located on the left and right sides of the rotating shaft system. Due to the limitation of the product's external dimensions, it is difficult to significantly increase the volume of the arc-extinguishing chamber, and it cannot accommodate more arc-extinguishing grids to improve the heat capacity.

[0005] 2. The linkages of its operating mechanism are highly interconnected. Under the premise of meeting other parameters, it is not convenient to increase the opening distance between the moving and stationary contacts by adjusting the fit dimensions between the linkages.

[0006] 3. Its arc-extinguishing chamber has poor arc-extinguishing performance due to its structural design;

[0007] 4. Its arc-extinguishing chamber lacks the necessary auxiliary structures to accelerate the entry of the electric arc into the arc-extinguishing chamber. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a circuit breaker with a reasonable internal layout of the phase pole breaking unit, providing more design space for the phase pole arc extinguishing system, and the phase pole arc extinguishing system has good arc extinguishing performance.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A circuit breaker includes an operating mechanism and at least one set of breaking units that are closed and opened by the operating mechanism, wherein at least one set of breaking units is a phase breaking unit for a phase circuit; a rocker arm assembly of the operating mechanism is located at one end of the operating mechanism in the vertical direction; the phase breaking unit includes a phase contact system and a phase arc extinguishing system arranged side by side along the vertical direction of the operating mechanism, the phase contact system including a phase rotating shaft mechanism and a phase stationary contact located on one side of the operating mechanism in the horizontal direction, the phase rotating shaft mechanism including a phase moving contact that cooperates with the phase stationary contact; the phase arc extinguishing system includes a main arc extinguishing chamber and a secondary arc extinguishing chamber arranged opposite each other at the arc inlet. The system comprises an arc-starting component, a main arc-starting plate for the main arc-extinguishing chamber, and an auxiliary arc-starting plate for the secondary arc-extinguishing chamber. The arc-starting component includes a main body disposed between the arc inlets of the main and secondary arc-extinguishing chambers, and a main arc-starting plate and an auxiliary arc-starting plate connected to the main body. The main body is also opposite to the separation opening formed by the phase moving contact and the phase stationary contact. The main arc-starting plate extends to the side of the main arc-extinguishing chamber away from the phase contact system, and the auxiliary arc-starting plate extends to the side of the secondary arc-extinguishing chamber away from the phase contact system. The main arc-extinguishing chamber arc-starting plate and the main arc-starting plate are disposed opposite to each other on both sides of the main arc-extinguishing chamber, and the auxiliary arc-extinguishing chamber arc-starting plate and the auxiliary arc-starting plate are disposed opposite to each other on both sides of the secondary arc-extinguishing chamber.

[0011] Preferably, the circuit breaker includes multiple sets of breaking units arranged side by side, wherein one set of breaking units is an N-pole breaking unit;

[0012] The N-pole breaking unit includes an N-pole contact system and an N-pole arc extinguishing system arranged side by side along the horizontal direction of the operating mechanism. The N-pole contact system includes an N-pole rotating shaft mechanism and an N-pole stationary contact used in conjunction. The operating mechanism is mounted on the N-pole breaking unit along its vertical direction. The N-pole moving contact mechanism and the phase pole rotating shaft mechanism are arranged side by side along the vertical direction of the operating mechanism and their rotation axes are parallel.

[0013] Preferably, the circuit breaker is a 2P+N type circuit breaker, with its two phase-pole breaking units distributed on both sides of the operating mechanism and the N-pole breaking unit.

[0014] Preferably, the main body of the arc-initiating component includes an arc-running track structure connected to the main arc-initiating plate and the auxiliary arc-initiating plate of the arc-initiating component, respectively. The arc-running track structure includes arc-running plates and arc-running plate connecting parts arranged side by side at intervals, and each arc-running plate is connected end to end through the arc-running plate connecting parts.

[0015] Preferably, the running arc plates are arranged parallel to each other, and the connecting part of the running arc plates is an arc-shaped plate structure.

[0016] Preferably, the arc-initiating component body includes a first main body part opposite to the arc inlet of the main arc-extinguishing chamber and a second main body part opposite to the arc inlet of the auxiliary arc-extinguishing chamber. One end of the first main body part is connected to one end of the main arc-initiating plate of the arc-initiating component, and the other end is connected to one end of the second main body part. The other end of the second main body part is connected to the auxiliary arc-initiating plate of the arc-initiating component. At least one of the first main body part and the second main body part is provided with an arc-running track structure.

[0017] Preferably, the first main body and the second main body are symmetrical structures, and both the first main body and the second main body are provided with a running arc structure.

[0018] Preferably, a U-shaped arc-extinguishing cavity is formed between adjacent arc-extinguishing plates, and the opening end of each U-shaped arc-extinguishing cavity alternately faces the arc inlet of the main arc-extinguishing chamber and the auxiliary arc-extinguishing chamber.

[0019] Preferably, the plane where the arc-running plate is located is parallel to the plane where the arc-extinguishing grid plates of the main arc-extinguishing chamber and the auxiliary arc-extinguishing chamber are located.

[0020] Preferably, a U-shaped arc-extinguishing cavity is formed between adjacent arc-running plates, and the opening end of the U-shaped arc-extinguishing cavity alternately faces the side where the phase pole contact system is located and the side where the main arc-running plate and the auxiliary arc-running plate of the arc-running component are located.

[0021] Preferably, the plane where the arc-running plate is located is perpendicular to the plane where the arc-extinguishing grid plates of the main arc-extinguishing chamber and the auxiliary arc-extinguishing chamber are located.

[0022] Preferably, the arc-initiating component body further includes an arc-initiating end located between the arc-initiating plate of the main arc-extinguishing chamber and the arc-initiating plate of the auxiliary arc-extinguishing chamber. The minimum distance between the moving contact and the arc-initiating end during the movement of the moving contact from the closed position to the open position is greater than the distance between the arc-initiating component body and the main arc-extinguishing chamber, the distance between the arc-initiating component body and the auxiliary arc-extinguishing chamber, the distance between the main arc-initiating plate of the arc-initiating component and the main arc-extinguishing chamber, and the distance between the auxiliary arc-initiating plate of the arc-initiating component and the auxiliary arc-extinguishing chamber.

[0023] Preferably, the main body of the arc-initiating component further includes a main body cap with an inverted V-shaped structure. The plane where each arc-running plate is located is parallel to the plane where the arc-extinguishing grid plates of the main arc-extinguishing chamber and the auxiliary arc-extinguishing chamber are located. The two ends of the main body cap are respectively connected to the first main body part and the second main body part of the main body of the arc-initiating component, and the bend in the middle of the main body cap is the arc-initiating end.

[0024] Preferably, the plane where each of the arc-running plates is located is perpendicular to the plane where the arc-extinguishing grid plates of the main arc-extinguishing chamber and the auxiliary arc-extinguishing chamber are located. The two adjacent arc-running plates of the first main body and the second main body of the arc-initiating component are central arc-running plates. The ends of the two central arc-running plates that are close to the phase pole contact system are flush with each other, protrude towards the side where the phase pole contact system is located relative to the other arc-running plates, and are connected by an arc-running plate connecting part. The arc-running plate connecting part is a central arc-running plate connecting part and is an arc-shaped plate. The midpoint of the central arc-running plate connecting part is the arc-initiating end.

[0025] Preferably, the phase pole arc extinguishing system further includes a magnetic blowout structure, which includes a first magnetic plate, a second magnetic plate, a third magnetic plate, a fourth magnetic plate, a fifth magnetic plate, a sixth magnetic plate, and a seventh magnetic plate. The first and third magnetic plates are disposed opposite each other on both sides of the main arc extinguishing chamber and located between the main arc-initiating plate of the arc-initiating component and the phase pole contact system. The first magnetic plate, the main body of the arc-initiating component, and the third magnetic plate together form a U-shaped structure surrounding the main arc extinguishing chamber. The second and fourth magnetic plates are disposed opposite each other on both sides of the secondary arc extinguishing chamber and located between the secondary arc-initiating plate of the arc-initiating component and the phase pole contact system. The second magnetic plate, the main body of the arc-initiating component, and the fourth magnetic plate together form a U-shaped structure surrounding the secondary arc extinguishing chamber. The fifth and sixth magnetic plates are disposed opposite each other on both sides of the split opening. The seventh magnetic plate is disposed between the ends of the fifth and sixth magnetic plates that are close to the phase pole stationary contact. The fifth, sixth, and seventh magnetic plates together form a U-shaped structure surrounding the split opening.

[0026] Preferably, the phase-pole arc extinguishing system further includes a first insulating plate, a second insulating plate, a third insulating plate, and a fourth insulating plate. The first insulating plate is disposed between the first magnetic conductive plate and the main arc extinguishing chamber and between the second magnetic conductive plate and the auxiliary arc extinguishing chamber. The second insulating plate is disposed between the third magnetic conductive plate and the main arc extinguishing chamber and between the fourth magnetic conductive plate and the auxiliary arc extinguishing chamber. The third and fourth insulating plates are respectively disposed on both sides of the fifth and sixth magnetic conductive plates.

[0027] Preferably, the operating mechanism includes a bracket, a rocker arm assembly rotatably mounted on the bracket, a jump fastener, a locking fastener that engages with the jump fastener, and a re-fastener that engages with the locking fastener, a first crank, an energy storage spring, a slide rail fixed relative to the bracket, a slider, and a first connecting rod; the rocker arm assembly includes a reset structure for driving the jump fastener and the locking fastener to re-engage, the first crank includes a crank limiting part, and in the closed or disengaged state of the operating mechanism, the crank limiting part engages with the jump fastener limiting part; one end of the first crank is rotatably mounted on the jump fastener around an eighth center, one end of the first connecting rod and one end of the energy storage spring are rotatably connected to the other end of the first crank around an eighteenth center, the other end of the first connecting rod is connected to the slider, the other end of the energy storage spring is rotatably connected to the rocker arm assembly, and the slider is mounted on the guide rail and slides back and forth along its extension direction; in the open or disengaged state of the operating mechanism, the slider engages with the slide rail limiting part to prevent the slider from sliding.

[0028] Preferably, the operating mechanism further includes a second connecting rod, a second crank, a third connecting rod, a third crank, and a fourth connecting rod. The second crank is rotatably arranged around a sixth center. One end of the second connecting rod is rotatably connected to the slider, and the other end and one end of the third connecting rod are rotatably connected to the second crank around a nineteenth center. The third crank is rotatably arranged around a seventh center and coincides with the rotation center of the phase pole rotating shaft mechanism. The third crank is drivenly connected to the phase pole rotating shaft mechanism to drive its rotation. The other end of the third connecting rod is rotatably connected to the third crank around a twentieth center to drive its rotation. The N-pole rotating shaft mechanism is rotatably arranged around a twenty-second center. One end of the fourth connecting rod is rotatably connected to the second crank around a twenty-first center, and the other end is connected to the N-pole rotating shaft mechanism to drive its rotation.

[0029] Preferably, the operating mechanism further includes a first traction rod and a transmission jumper that are engaged with each other and rotated respectively; the phase disconnection unit further includes a thermomagnetic tripping mechanism. When an overload or short circuit fault occurs in the circuit where the phase disconnection unit is located, the thermomagnetic tripping mechanism drives the first traction rod to rotate and release the engagement with the transmission jumper, and the transmission jumper rotates to drive the operating mechanism to disengage.

[0030] Preferably, the thermomagnetic tripping mechanism further includes a rotatably mounted second traction rod. The thermomagnetic tripping mechanism of each phase pole disconnecting unit shares the second traction rod. The second traction rod is connected to the first traction rod through a transmission link to drive its rotation. The transmission tripping buckle, the first traction rod, and the second traction rod are arranged side by side in the horizontal direction of the operating mechanism on one side of the operating mechanism.

[0031] Preferably, the bracket includes two bracket side plates arranged opposite each other, and the transmission buckle and the first traction rod are arranged between the two bracket side plates.

[0032] Preferably, when a short circuit fault occurs in the circuit where the phase pole disconnection unit is located, the phase pole moving contact is repelled and drives the first traction rod to rotate, thereby releasing the first traction rod from the latching engagement with the transmission jumper.

[0033] The circuit breaker of this invention, within its phase pole breaking unit, provides more space for the phase pole arc extinguishing system through the layout of the phase pole rotating shaft mechanism, facilitating an increase in the size and specifications of the phase pole arc extinguishing system. The phase pole arc extinguishing system includes a main arc extinguishing chamber and a secondary arc extinguishing chamber, fully utilizing the internal space of the phase pole breaking unit. This increases the number, length, surface area, thickness, and gap of the arc extinguishing grids, which is beneficial for arc cooling and cutting, preventing excessive temperature and insufficient arc penetration or large particle blockage, thus reducing the possibility of short circuits in the grids and improving the heat capacity of the phase pole arc extinguishing system. The main and secondary arc extinguishing chambers are connected in series via an arc-initiating component. This component improves the utilization rate of the arc extinguishing grids at the bottom of the two arc extinguishing chambers, serves to run and pull the arc, further cooling the arc to increase the arc voltage and reduce the arc conductivity, and also serves to initiate the arc, facilitating the entry of the arc into the two arc extinguishing chambers and quickly limiting the current.

[0034] In addition, the operating mechanism includes a first traction rod and a transmission jumper that engage with a snap-fit ​​mechanism, which, in conjunction with a thermomagnetic release mechanism, achieve reliable short-circuit and overload protection.

[0035] Furthermore, when the moving contact is pushed open, it drives the first traction rod and the transmission trip buckle to disengage, causing the operating mechanism to trip and enabling the circuit breaker to trip quickly. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the circuit breaker of the present invention, showing the assembly relationship between each breaking unit and the circuit breaker housing;

[0037] Figure 2 This is a schematic diagram of the assembly structure of the operating mechanism and the N-pole disconnecting unit of the present invention;

[0038] Figure 3 This is an exploded structural diagram of the operating mechanism of the present invention;

[0039] Figure 4a This is a schematic diagram of the circuit breaker in the tripped state according to the present invention;

[0040] Figure 4b This is a schematic diagram of the operating mechanism in the tripped state of the present invention;

[0041] Figure 4c This is a schematic diagram of the operating mechanism of the present invention in the tripped state;

[0042] Figure 5a This is a schematic diagram of the circuit breaker structure during the re-clamping process of the present invention;

[0043] Figure 5b This is a schematic diagram of the operating mechanism during the re-fastening process of the present invention;

[0044] Figure 5c This is a schematic diagram of the operating mechanism during the re-fastening process of the present invention;

[0045] Figure 6a This is a schematic diagram of the circuit breaker in the closed state of the present invention;

[0046] Figure 6b This is a schematic diagram of the operating mechanism of the present invention in the closed state;

[0047] Figure 6c This is a schematic diagram of the operating mechanism of the present invention in the closed state;

[0048] Figure 7a This is a schematic diagram of the phase pole breaking unit of the present invention, in which the phase pole moving contact and the phase pole stationary contact are in a closed state;

[0049] Figure 7b This is a schematic diagram of the phase contact system of the present invention, in which the phase moving contact and the phase stationary contact are in a closed state;

[0050] Figure 8a This is a schematic diagram of the phase pole breaking unit of the present invention, in which the phase pole moving contact is repelled;

[0051] Figure 8b This is a schematic diagram of the phase contact system of the present invention, in which the moving phase contact is repelled.

[0052] Figure 9 This is a schematic diagram of the phase pole breaking unit of the present invention, in which the phase pole moving contact and the phase pole stationary contact are in the breaking state;

[0053] Figure 10 This is an exploded structural diagram of the phase pole breaking unit of the present invention;

[0054] Figure 11 This is an exploded structural diagram of the phase pole rotating shaft mechanism of the present invention;

[0055] Figure 12 This is a schematic diagram of the assembly relationship between the phase electrode housing and the thermomagnetic tripping mechanism of the present invention;

[0056] Figure 13 This is a schematic diagram of the thermomagnetic tripping mechanism of the present invention;

[0057] Figure 14 This is an exploded structural diagram of the phase pole arc extinguishing system of the present invention;

[0058] Figure 15a This is a schematic diagram of the cooperation structure between the phase electrode contact system of the present invention and the phase electrode arc extinguishing system of the first embodiment, with the phase electrode contact system in a closed state;

[0059] Figure 15b This is a schematic diagram of the phase pole arc extinguishing system according to the first embodiment of the present invention;

[0060] Figure 16a This is a schematic diagram of the cooperation structure between the phase electrode contact system of the present invention and the phase electrode arc extinguishing system of the second embodiment, with the phase electrode contact system in the process of disconnection;

[0061] Figure 16b This is a schematic diagram of the phase pole arc extinguishing system according to the second embodiment of the present invention;

[0062] Figure 17a This is a schematic diagram of the cooperation structure between the phase electrode contact system of the present invention and the phase electrode arc extinguishing system of the third embodiment, with the phase electrode contact system in a disconnected state;

[0063] Figure 17b This is a schematic diagram of the phase pole arc extinguishing system according to the third embodiment of the present invention.

[0064] Explanation of reference numerals in the attached figures

[0065] Disconnection outlet OD;

[0066] Center 1 (1S); Center 2 (2S); Center 3 (3S); Center 4 (4S); Center 5 (5S); Center 6 (6S); Center 7 (7S); Center 8 (8S); Center 10 (10S); Center 11 (11S); Center 13 (13S); Center 15 (15S); Center 16 (16S); Center 17 (17S); Center 18 (18S); Center 19 (19S); Center 20 (20S); Center 21 (21S); Center 22 (22S); Center 23 (23S); Center 24 (24S);

[0067] First axis 1a; Second axis 2a; Third axis 3a; Fourth axis 4a; Sixth axis 6a; Seventh axis 7a; Eighth axis 8a; Eighteenth axis 18a; Nineteenth axis 19a; Twentieth axis 20a; Twenty-first axis 21a;

[0068] 1. Bracket; 1-0. Slide rail; 2. Handle; 3. Rocker arm; 4. Energy storage spring; 5. Energy storage spring shaft; 6. Reset structure; 7. Jump fastener; 9. Re-fastener; 10. Locking fastener; 11. Locking fastener spring; 14. First crank; 15. Crank limiting part; 16. First connecting rod; 18. Slider; 19. Second connecting rod; 20. Slider shaft; 21. Second crank; 23. Third connecting rod; 25. Phase pole drive shaft; 28. Fourth connecting rod; 29. ​​N pole rotating shaft; 30. N pole drive shaft; 31. Transmission jump fastener; 32. First traction rod; 34. First traction rod reset spring; 36. Side plate connecting rod; 37. First traction rod limiting shaft; 38. Phase pole rotating shaft; 39. Phase pole guide. Electrical component 40; Phase pole moving contact 41; Phase pole contact spring 44; First phase pole contact spring shaft 45; Second phase pole contact spring shaft 46; First transmission structure 47; Phase pole connecting shaft 48; Grid assembly 49; Arc ignition component 50; Arc extinguishing partition 51; Main arc extinguishing chamber arc ignition plate 52; Auxiliary arc extinguishing chamber arc ignition plate 53; Arc ignition component body 50-0; First main body part 50-0a; Second main body part 50-0b; Arc running track structure 50-01; Arc ignition component transition part 50-02; Arc running plate 50-010; Arc running plate connecting part 50-011; U-shaped arc extinguishing cavity 50-012; Arc ignition component main arc ignition plate 50-1; Arc ignition component Sub-arc-initiating plate 50-2; Main isolation barrier 54; Sub-isolation barrier 55; First insulating plate 56-1; Second insulating plate 56-2; First magnetic guide plate 57; Second magnetic guide plate 58; Third magnetic guide plate 59; Fourth magnetic guide plate 60; Fifth magnetic guide plate 61; Sixth magnetic guide plate 62; Seventh magnetic guide plate 63; Conductive component connecting shaft 64; Second transmission structure 65; Third transmission structure 66; Conductive plate 67; Magnetic yoke 68; Armature 69; Armature transmission component 70; Armature return spring 71; Second traction rod 72; Bimetallic element 74; Armature shaft 75; Armature transmission component shaft 76; First phase pole positioning shaft 77; Second phase pole positioning shaft 78; First N-pole positioning shaft; 79; Second N-pole positioning shaft; 80; First phase pole insulating sleeve; 81; Second phase pole insulating sleeve; 82; N-pole stationary contact; 92; Phase pole contact system; 93; Phase pole arc extinguishing chamber; 94; Main grid plate group; 94-1; Sub-grid plate group; 94-2; Fast trip device; 96; Operating mechanism; 100; Phase pole disconnecting unit; 101; Face cover; 103; Base; 104; Thermomagnetic tripping mechanism; 105; First phase pole half-shell; 106; Second phase pole half-shell; 107; Third insulating plate; 109; Fourth insulating plate; 110; Phase pole stationary contact; 111; Transmission link; 113; Arc extinguishing grid plate; 490; N-pole arc extinguishing system; 940. Detailed Implementation

[0069] The following is in conjunction with the appendix Figure 1-17b The given embodiments further illustrate specific implementations of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0070] like Figure 1 , 4aAs shown in Figures 5a and 6a, the circuit breaker of the present invention includes an operating mechanism 100 and at least one set of breaking units. The at least one set of breaking units is a phase-pole breaking unit. The operating mechanism 100 is driven to connect with the breaking unit to drive its closing and opening, thereby closing and opening the circuit breaker. Further, the circuit breaker of the present invention is preferably a multi-phase circuit breaker, a two-phase (2P or P+N), three-phase (2P+N), or four-phase (3P+N) circuit breaker.

[0071] like Figure 1 As shown, the circuit breaker of the present invention also includes a circuit breaker housing for accommodating and installing the operating mechanism 100 and the breaking unit. The circuit breaker housing includes a housing body (not shown in the figure), a face cover 103, and a base 104. The base 104 is disposed within the space formed by the housing body and the face cover 103, which are relatively fastened together. The operating mechanism 100 and the breaking unit are respectively disposed within corresponding spaces of the base 104. Furthermore, the base 104 has a plurality of side-by-side mounting spaces, each mounting space accommodating one breaking unit.

[0072] like Figure 7a , 8a As shown in Figures 9-10 and 12, the phase pole disconnection unit includes a phase pole housing, which includes a first phase pole half-shell 106 and a second phase pole half-shell 107 that are engaged with each other. The first phase pole half-shell 106 and the second phase pole half-shell 107 are engaged with each other to form a phase pole mounting space for accommodating the phase pole contact system 93 and the phase pole arc extinguishing system 94. Furthermore, the phase pole housing has an overall convex-shaped structure. The phase pole rotating shaft structure of the phase pole contact system 93 is located in the upper part of the convex-shaped structure, and the phase pole arc extinguishing system 94 is located in the lower part of the convex-shaped structure. Furthermore, the phase electrode housing is also provided with a tripping mechanism mounting cavity for accommodating the thermomagnetic tripping mechanism 105 (described later). The phase electrode mounting space and the tripping mechanism mounting cavity are set independently of each other. Preferably, a partition wall is provided between the tripping mechanism mounting cavity and the phase electrode mounting space. The partition wall is provided with a clearance opening so that the conductive plate 67 of the thermomagnetic tripping mechanism 105 can be connected to the phase electrode conductive element 40 of the phase electrode rotating shaft mechanism. The tripping mechanism mounting cavity is located on one side of the phase electrode rotating shaft mechanism in the horizontal direction of the operating mechanism 100.

[0073] In this embodiment, the circuit breaker is preferably a 2P+N type three-phase circuit breaker, which includes three sets of breaking units. The three sets of breaking units are preferably arranged side by side along the thickness direction of the operating mechanism 100 (that is, the side-by-side direction of the two support side plates of the support 1 of the operating mechanism 100). One set of breaking units is a short-circuit N-pole breaking unit 102 for breaking and closing the N-pole circuit, and the other two sets of breaking units are phase pole breaking units 101 for breaking and closing the corresponding phase pole circuit. The two sets of phase pole breaking units 101 are preferably distributed on both sides of the N-pole breaking unit 102 and located on both sides of the two support side plates of the support 1 of the operating mechanism 100.

[0074] like Figure 1 , 4a As shown in Figures 5a, 6a, and 10, the operating mechanism 100 is connected to the phase pole housing via a first phase pole positioning shaft 77 and a second phase pole positioning shaft 78 arranged side by side at intervals. The first phase pole positioning shaft 77 and the second phase pole positioning shaft 78 preferably pass through the bracket side plate of the bracket 1 of the operating mechanism 100 and the phase pole housing. The first phase pole insulating sleeve 81 and the second phase pole insulating sleeve 82 are preferably respectively sleeved on the parts of the first phase pole positioning shaft 77 and the second phase pole positioning shaft 78 inserted into the phase pole housing to prevent phase-to-phase breakdown of different phase pole breaking units under high voltage through the first phase pole positioning shaft 77 and the second phase pole positioning shaft 78.

[0075] like Figure 1 As shown, the operating mechanism 100 is connected to the N pole housing of the N pole breaking unit 102 by a first N pole positioning shaft 79 and a second N pole positioning shaft 80 arranged side by side at intervals. The first N pole positioning shaft 79 and the second N pole positioning shaft 80 preferably pass through the bracket side plate of the bracket 1 of the operating mechanism 100 and the N pole housing.

[0076] like Figure 4a , 5a As shown in 6a, 7a-11, 14, 15a, 16a, and 17a, the phase pole breaking unit 102 includes a phase pole contact system 93. The phase pole contact system 93 includes a phase pole rotating shaft mechanism and a phase pole stationary contact 111 that work together. The phase pole rotating shaft mechanism is rotatably disposed within the phase pole housing around the seventh center 7S. The phase pole rotating shaft mechanism includes a rotatably disposed phase pole rotating shaft 39 and a phase pole moving contact 41 disposed on the phase pole rotating shaft 39 and working with the phase pole stationary contact 111. The phase pole rotating shaft mechanism is driven by the operating mechanism 100 to close and open with the phase pole stationary contact 111, thereby closing or opening the phase pole breaking unit. Furthermore, the phase polarity breaking unit 102 also includes a phase polarity arc extinguishing system 94 that cooperates with the phase polarity contact system; in the horizontal direction of the operating mechanism 100, the phase polarity rotating shaft mechanism is arranged side by side with the operating mechanism 100; in the vertical direction of the operating mechanism 100, the phase polarity rotating shaft mechanism is arranged side by side with the phase polarity arc extinguishing system 94; the above layout ensures that the trajectory of the phase polarity moving contact 41 when it breaks with the phase polarity stationary contact 111 is directly opposite the bottom surface of the housing of the phase polarity breaking unit 102, which is beneficial to realizing the horizontal design of the phase polarity arc extinguishing system 94, providing more design space for the phase polarity arc extinguishing system, which is beneficial to increasing the heat capacity of the phase polarity arc extinguishing system 94, and increasing the upper limit of the breaking voltage of the phase polarity arc extinguishing system 94. Figure 2 , 4a As shown in -6c, the horizontal direction of the operating mechanism 100 is the left-right direction, and the vertical direction of the operating mechanism 100 is the up-down direction.

[0077] like Figure 7b , 8bAs shown in Figure 11, this is one embodiment of the phase pole rotating shaft mechanism: The phase pole rotating shaft mechanism includes a phase pole rotating shaft 39, a phase pole moving contact 41, a phase pole contact spring 44, and a phase pole conductive element 40. A phase pole rotating shaft mounting cavity is provided in the middle of the phase pole rotating shaft 39. The phase pole moving contact 41 includes a phase pole moving contact connecting end and a phase pole moving conductive rod. One end of the phase pole conductive rod is connected to the phase pole moving contact connecting end, and the other end is provided with a phase pole moving contact. The phase pole moving contact connecting end is rotatably disposed within the phase pole rotating shaft mounting cavity around the fifteenth center 15S, which coincides with the seventh center 7S. The phase pole conductive element 40 includes a U-shaped conductive element connecting part, which includes a connecting part base plate... A pair of connecting arms are provided, with the free ends of the connecting arms rotatably connected to the phase pole moving contact connection end. The two connecting arms are also connected by a conductive connecting shaft 64, which presses the two connecting arms against the phase pole moving contact connection end. The conductive connecting shaft 64 is located between the bottom plate of the connecting part and the free ends of the connecting arms. The phase pole rotating shaft 39, the connecting arms, and the phase pole moving contact connection end are connected by a phase pole connecting shaft 48. The phase pole contact spring 44 is set in the phase pole rotating shaft mounting cavity. One end is connected to the phase pole moving contact 41 through the first phase pole contact spring shaft 45, and the other end is rotatably set on the phase pole rotating shaft 39 around the thirteenth center 13S through the second phase pole contact spring shaft 46.

[0078] like Figures 7a-7b As shown, the phase pole rotating shaft mechanism rotates around the seventh center 7S, causing the phase pole moving contact 41 to close or open with the corresponding phase pole stationary contact 111. The fifteenth center 15S is located on one side of the axis of the phase pole contact spring 44. The phase pole contact spring 44 applies a force to the phase pole moving contact 41, causing it to engage with the phase pole rotating shaft 39 to maintain relative stillness. Figures 8a-8b As shown, when the phase moving contact 41 is repelled by the electric repulsion between the phase moving contact 41 and the phase stationary contact 111, the phase moving contact 41 drives the phase contact spring 44 to rotate past the dead point, so that the fifteenth center 15S is located on the other side of the axis of the phase contact spring 44. The phase contact spring 44 applies a force to the phase moving contact 41 to lock it in the disconnected position, so as to prevent the phase moving contact 41 from falling back and closing with the phase stationary contact 111 again, resulting in a secondary short circuit.

[0079] like Figure 7b , 8bAs shown in Figure 11, the phase pole rotating shaft mechanism further includes an insulating component 42. The insulating component 42 includes an insulating component mounting cavity for accommodating the phase pole moving contact 41 and an insulating component arc-blocking plate. The insulating component plate is in relative cooperation with the circumferential sidewall of the phase pole rotating shaft 39. When the phase pole moving contact 41 rotates relative to the phase pole rotating shaft 39 (for example, when the phase pole moving contact 41 is repelled by an electric repulsive force), it blocks the gap between the phase pole moving contact 41 and the phase pole rotating shaft 39, preventing arc particles from entering the phase pole rotating shaft mounting cavity and preventing jamming inside the phase pole rotating shaft 39. Moreover, it isolates the phase pole rotating shaft mounting cavity from the corresponding phase pole arc-extinguishing system 94, which is beneficial for arc gas to enter the arc-extinguishing system 94.

[0080] like Figure 2 As shown, the N-pole breaking unit 101 includes an N-pole contact system, which includes an N-pole rotating shaft mechanism and an N-pole stationary contact 92. The N-pole rotating shaft mechanism includes a rotatably mounted N-pole rotating shaft 30 and an N-pole moving contact 91 mounted on the N-pole rotating shaft 30 and cooperating with the stationary contact 92. The N-pole rotating shaft mechanism is driven by the operating mechanism 100 to close and open with the N-pole stationary contact 92, thereby closing or opening the N-pole breaking unit. Furthermore, the N-pole breaking unit 101 also includes an N-pole arc-extinguishing system 940 that cooperates with the N-pole contact system. In the horizontal direction of the operating mechanism 100, the N-pole contact system and the N-pole arc-extinguishing system 940 are arranged side-by-side.

[0081] The N-pole rotating shaft mechanism is the same as the phase pole rotating shaft mechanism, and will not be described further here.

[0082] like Figure 1-6c As shown, this is one embodiment of the operating mechanism. The operating mechanism has three working states: open state, closed state, and tripped state (open tripped state). In the tripped state, the operating mechanism can be switched to the open state by re-tripping.

[0083] like Figure 2-3As shown in 4b-4c, 5b-5c, and 6b-6c, the operating mechanism 100 includes a bracket 1, a rocker arm assembly rotatably mounted on the bracket 1, a jump fastener 7, a locking fastener 10 that engages with the jump fastener 7, and a re-fastener 9 that engages with the locking fastener 10 for limiting, a first crank 14, an energy storage spring 4, a slide rail 1-0 fixed relative to the bracket 1, a slider 18, a first connecting rod 16, a second connecting rod 19, a second crank 21 rotatably mounted around a sixth center 6S, a third connecting rod 23, a third crank 25, and a fourth connecting rod 29; the rocker arm assembly has three working positions, namely a closed position, a disengaged position, and an open position, which correspond to the closed state, disengaged state, and open state of the operating mechanism 100, respectively; when the rocker arm assembly switches between the closed and open positions, the energy storage spring 4 first stores energy and then releases energy to drive the operating mechanism to quickly switch between the closed and open states; the first crank... 14 is rotatably mounted on the jump fastener 7S around the eighth center 8S. The other end of the first crank 14 is rotatably connected to one end of the first connecting rod 16 and one end of the energy storage spring 4 around the eighteenth center 18S. The other end of the first connecting rod 16 is connected to the slider 18, and the other end of the energy storage spring 4 is rotatably connected to the rocker arm assembly. The phase pole rotating shaft 39 and the third crank 25 are respectively rotatably mounted around the seventh center 7S. The N pole rotating shaft 30 is rotatably mounted around the twenty-second center 22S. One end of the second connecting rod 19 is rotatably connected to the slider 18, and the other end is rotatably connected to the second crank 21 around the nineteenth center 19S to drive its rotation. One end of the fourth connecting rod 29 is rotatably connected to the second crank 21, and the other end is rotatably connected to the N pole rotating shaft 30 to drive its rotation. One end of the third connecting rod 23 is rotatably connected to the second crank 21 around the nineteenth center 19S, and the other end is rotatably connected to the third crank 25 to drive its rotation. The third crank 25 is rotatably connected to the phase pole rotating shaft 39 to drive its rotation. Furthermore, the rocker arm assembly includes a re-engaging structure 6 for driving the trip fastener 7 to re-engage with the locking fastener 10. When the operating mechanism 100 is in the disengaged state, the rocker arm assembly swings towards the open position to drive the trip fastener 7 to re-engage with the locking fastener 10 via the re-engaging structure 6. The first crank 14 includes a crank limiting structure 15 for limiting engagement with the trip fastener 7. When the operating mechanism 100 is in the closed or disengaged state, the crank limiting part 15 engages with the trip fastener 7. The operating mechanism, by setting two sets of four-bar linkages, enables the N-pole rotating shaft 30 and the phase pole rotating shaft 39 to be driven separately, and allows their rotation centers to be different, providing greater flexibility for the design of the operating mechanism and the layout of the circuit breaker.

[0084] like Figure 2 , 4bAs shown in -4c, 5c-5c, and 6b-6c, in the vertical direction of the operating mechanism 100, the rocker arm assembly and the second crank 21 are located at both ends of the operating mechanism 100, the phase pole shaft 39 and the N pole shaft 30 are arranged side by side, the third crank 25 is located near the rocker arm assembly, and the N pole shaft 30 is located near the second crank 21. That is, the rocker arm assembly and the third crank 25 are located on one side in the horizontal direction of the operating mechanism 100, and the second crank 21 and the N pole shaft 30 are located on the other side in the horizontal direction of the operating mechanism 100. In the horizontal direction of the operating mechanism 100, the rocker arm assembly and the third crank 25 are arranged side by side, and the third crank 25, the phase pole shaft 39, and the N pole shaft 30 are located on the same side of the operating mechanism 100. Specifically, as shown... Figure 2 , 4b In the directions shown in -4c, 5c-5c, and 6b-6c, the rocker arm assembly and the second crank 21 are located at the upper and lower ends of the operating mechanism 100, respectively. The phase pole shaft 39 and the N pole shaft are arranged side by side with intervals. The rocker arm assembly and the third crank 25 are located on the upper side, and the second crank 21 and the N pole shaft 30 are located on the lower side. The third crank 25, the phase pole shaft 39, and the N pole shaft 30 are all located on the right side of the operating mechanism 100. In this embodiment, in the horizontal direction of the operating mechanism 100, the phase pole shaft 39 is arranged side by side with the operating mechanism 100, making full use of the length of the circuit breaker and reserving more space for the design of the phase pole arc extinguishing system 94, which can realize the horizontal design of the phase pole arc extinguishing system 94.

[0085] like Figure 2-3 As shown in 4b-4c, 5b-5c, and 6b-6c, the second crank 21, the third crank 25, the N-pole shaft 30, and the phase shaft 39 are arranged to rotate synchronously and in the same direction. That is to say, the second crank 21, the third crank 25, the N-pole shaft 30, and the phase shaft 39 maintain synchronous rotation, and the rotation direction is the same at the same time. For example, during the closing process of the operating mechanism, all four rotate clockwise at the same time, and during the opening process of the operating mechanism, all four rotate counterclockwise at the same time.

[0086] like Figure 2-3As shown in 4b-4c, 5b-5c, and 6b-6c, the rocker arm assembly is rotatably mounted on the bracket 1 via the fourth center 4S; one end of the jump fastener 7 is rotatably mounted on the bracket 1 around the first center 1S, and the other end is engaged with the locking fastener 10; the locking fastener 10 is rotatably mounted on the bracket 1 around the second center 2S; the jump fastener 9 is rotatably mounted on the bracket 1 around the third center 3S; the third connecting rod 23 is rotatably connected to the second crank 21 around the nineteenth center 19S and rotatably connected to the third crank 25 around the twentieth center 20S; one end of the fourth connecting rod 29 is rotatably connected to the second crank 21 around the twenty-first center 21S, and the other end is rotatably connected to the N-pole rotating shaft 30 around the twenty-third center 23S. Furthermore, the jump fastener 7 is rotatably mounted on the bracket 1 via a first shaft 1a whose axis coincides with the first center 1S; the rocker arm assembly is rotatably mounted on the bracket 1 via a fourth shaft 4a whose axis coincides with the fourth center 4S; the locking fastener 10 is rotatably mounted on the bracket 1 via a second shaft 2a whose axis coincides with the second center 2S; the re-fastener 9 is rotatably mounted on the bracket 1 via a third shaft 3a whose axis coincides with the third center 3S; the first crank 14 is rotatably connected to the jump fastener 7 via an eighth shaft 8a whose axis coincides with the eighth center 8S; the first crank 14, the first connecting rod 16, and the energy storage spring 4 are rotatably connected via a tenth shaft 18a whose axis coincides with the eighteenth center 18S. The eighth axis 18a is rotatably connected; the second crank 21 is rotatably mounted on the support 1 via the sixth axis 6a whose axis coincides with the sixth center 6S; the third crank 25 is rotatably mounted on the support 1 via the seventh axis 7a whose axis coincides with the seventh center 7S; the second connecting rod 19, the third connecting rod 23, and the second crank 21 are rotatably connected via the nineteenth axis 19a whose axis coincides with the nineteenth center 19S, and the second connecting rod 19 is also rotatably connected to the third crank 25a via the twentieth axis 20a whose axis coincides with the twentieth center 20S; the second crank 21 is rotatably connected to the fourth connecting rod 29 via the twentieth axis 21a whose axis coincides with the twenty-first center 21S.

[0087] like Figure 1 , 3 As shown in Figures 5b and 6b, the third crank 25 is driven and connected to the phase pole rotating shaft 39 via the phase pole drive shaft 28. The axis of the camera drive shaft 28 is parallel to the axis of rotation of the third crank 25. Preferably, the phase pole housing has a phase pole housing clearance hole for avoiding the phase pole drive shaft 28. The shape of the phase pole housing clearance hole matches the movement trajectory of the phase pole drive shaft 28, and the phase pole housing clearance hole is preferably a fan-shaped hole. Furthermore, when the operating mechanism 100 is in the open or tripped state, the phase pole drive shaft 28 is limited by the bracket 1, preventing the phase pole rotating shaft 39 from rotating further, thus limiting the phase pole rotating shaft mechanism and the moving contact 41 to the disconnected position.

[0088] like Figure 3 ,4b As shown in Figure 5b, the bracket 1 is provided with a third crank guide hole, and the twentieth shaft 20a is inserted into the third crank guide hole. The shape of the third crank guide hole matches the movement trajectory of the twentieth shaft 20a. Furthermore, the third crank guide hole is a fan-shaped hole.

[0089] like Figure 3 As shown, the operating mechanism 100 also includes a locking spring 11, which is a torsion spring sleeved on the second shaft 2a, with its two ends cooperating with the locking element 10 and the re-fastening element 9, respectively.

[0090] like Figures 4a-5c As shown, when the operating mechanism 100 is in the open or tripped state, the nineteenth shaft 19a engages with the bracket 1 to limit the rotation of the second crank 21. Furthermore, the nineteenth shaft 19a abuts against the side edge of the bracket side plate of the bracket 1 to achieve the limiting engagement.

[0091] like Figure 2 , 4c As shown in Figures 5c and 6c, the fourth center 4S, the seventh center 7S, the twenty-second center 22S, and the sixth center 6S are located at the four vertices of a quadrilateral. Further, the fourth center 4S, the seventh center 7S, the twenty-second center 22S, and the sixth center 6S are located at the four vertices of a quadrilateral in a clockwise direction and are arranged parallel to each other. Further, the seventh center 7S, the twenty-second center 22S, and the sixth center 6S are located at the three vertices of a triangle in a clockwise direction, preferably an acute triangle.

[0092] like Figure 2 , 4c As shown in Figures 5c and 6c, the sixth center 6S, the seventh center 7S, the twentieth center 20S, and the nineteenth center 19S are located at the four vertices of a quadrilateral. Furthermore, the sixth center 6S, the seventh center 7S, the twentieth center 20S, and the nineteenth center 19S are located at the four vertices of a quadrilateral in a clockwise direction. That is to say, the second crank 21, the third connecting rod 23, and the third crank 25 constitute a four-bar linkage, which is the first four-bar linkage structure 97.

[0093] like Figure 2 , 4cAs shown in Figures 5c and 6c, the six centers 6S, 22S, 23S, and 21S are located at the four vertices of a quadrilateral. Furthermore, the six centers 6S, 22S, 23S, and 21S are located at the four vertices of a quadrilateral in a clockwise direction. That is to say, the second crank 21, the fourth connecting rod 29, and the N-pole shaft 30 constitute a four-bar linkage structure, which is the second four-bar linkage structure 98.

[0094] The operating mechanism of this embodiment, by setting two sets of four-bar linkage structures, namely the first four-bar linkage structure 97 and the second four-bar linkage structure 98, meets the action design requirements of the operating mechanism and shaft system of 2P and 2P+N type circuit breakers, and realizes the related scheme of multi-pole shafts with different axes (for example, phase pole shaft 39 and N pole shaft 30 are not the same axis).

[0095] like Figure 2 As shown, the second crank 21 is a triangular plate structure. Its first vertex is rotatably positioned around the sixth center 6S, its second vertex is rotatably connected to the second connecting rod 19 and the third connecting rod 23 around the nineteenth center 19S, and its third vertex is rotatably connected to the fourth connecting rod 29 around the twenty-first center 21S. It should be noted that the structure of the second crank 21 is not limited to a triangular plate structure. As long as the positions of the sixth center 6S, the nineteenth center 19S, and the twenty-first center 21S on the second crank 21 are triangularly distributed, the vertex angle of the triangle corresponding to the nineteenth center 19S is preferably ≥90°.

[0096] like Figure 2 As shown, the third crank 25 is a triangular plate structure. Its first vertex is rotatably positioned around the seventh center 7S, its second vertex is rotatably connected to the third connecting rod 23 around the twentieth center 20S, and its third vertex is rotatably connected to the phase pole shaft 39 around the twenty-fourth center 24S. It should be noted that the structure of the third crank 25 is not limited to a triangular plate structure; it is acceptable as long as the seventh center 7S, the twentieth center 20S, and the twenty-fourth center 24S are arranged in a triangular pattern on the third crank 25. Preferably, the vertex angle of the triangle corresponding to the seventh center 7S is >90°.

[0097] like Figures 4b-4cAs shown in Figures 5b-5c, when the operating mechanism 100 is in the open or tripped state, the slider 18 is limited by the slide rail 1-0 to prevent the slider 18 from sliding. The slider 18 converts the movement position of the first connecting rod 16 during the opening and closing process of the operating mechanism 100 into the displacement of the slider 18, which facilitates actual measurement and adjustment of parameters such as the structural dimensions connected to the slider 18. Moreover, at this time, the rotation of the mechanism connecting rod and the transmission of torque can be realized through the first crank 14, the first connecting rod 16 and the slider 18. The operating mechanism can realize the opening, closing and tripping operations without connecting to the camera shaft 39 and / or the N-pole shaft, which facilitates the modular production of the operating mechanism 100. In other words, in the operating mechanism 100, the slide rail 1-0 not only provides guidance for the slider 18, but also serves as a support point, providing support for the first connecting rod 16 and the slider 18. This allows the operating mechanism 100 to have stable closing, opening, and tripping positions without being connected to the rotating shaft mechanism of the disconnecting unit. This makes the operating mechanism 100 an independently operable component, which is beneficial for modular assembly and production of the operating mechanism 100. It also allows for more design space for the distribution of the operating mechanism 100 within the circuit breaker. Furthermore, in actual production, the operating mechanism 100 does not need to cooperate with the rotating shaft mechanism of the disconnecting unit, avoiding wear and tear on the contact system of the disconnecting unit during testing and reducing R&D and production costs.

[0098] The slide rail 1-0 is preferably a groove-shaped structure or a hole-shaped structure.

[0099] The slide rail 1-0 is preferably mounted on the bracket 1. It should be noted that the slide rail 1-0 may also not be mounted on the bracket 1, but may be mounted on a support structure independent of the operating mechanism 100, such as on the housing structure for accommodating the operating mechanism 100 or on the housing of the splitting unit.

[0100] like Figure 2-3 As shown in 4b-4c, 5b-5c, and 6b-6c, the slide rail 1-0 is preferably provided with an elongated straight hole on the bracket 1, and the slider 18 reciprocates in the elongated straight hole along its extension direction. Further, one end of the elongated straight hole is open, and the other end is closed and cooperates with the slider 18 to limit the slider 18 to its open position.

[0101] like Figure 2 , 4bAs shown in Figures 5b and 6b, the bracket 1 includes two opposing bracket side plates. Each bracket side plate includes a first side plate and a second side plate connected to each other. In the horizontal direction of the operating mechanism 100, the first side plate and the second side plate are arranged side by side. The rocker arm assembly, the jump fastener 7, the locking fastener 10, the re-fastener 9, and the second crank 21 are rotatably mounted on the first side plate. The first side plate has V-grooves and slide rails 1-0 at both ends in the vertical direction of the operating mechanism 100. The rocker arm assembly swings in the V-grooves, and the third crank 25 is rotatably mounted on the second side plate. Furthermore, the guide hole for the third crank is provided on the second side plate. Specifically, the first side plate and the second side plate are arranged side by side, with a V-groove at the upper end and a slide rail 1-0 at the lower end of the first side plate.

[0102] The first and second parts of the side panel are either an integral structure or a separate structure.

[0103] like Figure 2 , 4bAs shown in Figures 5b and 6b, the operating mechanism 100 includes two sets of second cranks 21 symmetrically arranged, two sets of third connecting rods 23 symmetrically arranged, two sets of third cranks 25 symmetrically arranged, two sets of fourth connecting rods 29 symmetrically arranged, two sets of sliders 18 symmetrically arranged, two sets of first connecting rods 16 symmetrically arranged, two sets of first cranks 14 symmetrically arranged, two sets of energy storage springs 4 symmetrically arranged, and two sets of slide rails 1-0 symmetrically arranged on the side plates of the two supports. The rocker arm assembly includes a handle 2 and a rocker arm 3 fixedly connected. The rocker arm 3 includes two rocker arm legs arranged opposite each other. The two rocker arm legs are rotatably mounted on the fourth shaft 4a. On the two support side plates (preferably, the fourth shaft 4a includes two symmetrically arranged independent shafts, and the two rocker arm legs are respectively rotatably mounted in the V-shaped grooves of the two support side plates through the two independent shafts), the two rocker arm legs are preferably mounted in the V-shaped grooves of the two support side plates, two sets of first cranks 14 are respectively mounted on both sides of the jump fastener 7 and one end is rotatably connected to the jump fastener 7 through the eighth shaft 8a, the other end of the two sets of first cranks 14, one end of the two sets of first connecting rods 16 and one end of the two sets of energy storage springs 4 are rotatably connected through the eighteenth shaft 18a, the other end of the two sets of energy storage springs 4 is connected to the energy storage spring shaft 5, and the energy storage spring shaft 5 is respectively connected to the rocker arm 3. Two rocker arm legs are fixedly connected. Two sets of energy storage springs 4 are preferably arranged on both sides of the two sets of first cranks 14. Two sets of first connecting rods 16 are preferably arranged on both sides of the two sets of energy storage springs 4. Two sets of sliders 18 are connected by slider shafts 20 and are respectively arranged on two sets of slide rails 1-0. The other ends of the two sets of first connecting rods 16 and one end of the two sets of second connecting rods 19 are respectively rotatably connected to the sliders 18 through slider shafts 20. Two sets of second cranks 21 are respectively rotatably arranged on the two side plates of the bracket 1 through the sixth shaft 6a. The other ends of the two sets of second connecting rods 19 and one end of the third connecting rod 23 are respectively rotatably connected to the two sets of second cranks 21 through the nineteenth shaft 19a. The third crank 25 is rotatably mounted on the two support side plates via the seventh shaft 7a, and preferably located between the two support side plates. The other end of the two sets of third connecting rods 23 is rotatably connected to the two sets of third cranks 25 via the twentieth shaft 20a, and preferably located between the two support side plates. The two sets of third cranks 25 are driven and connected to the phase pole rotating shaft 39 via the phase pole drive shaft 28. One end of the two sets of fourth connecting rods 29 is rotatably connected to the two sets of second cranks 21 via the twenty-first shaft 21a, and the other end is rotatably connected to the N pole rotating shaft 30 via the N pole drive shaft 31. The two sets of fourth connecting rods 29 are preferably located on both sides of the axial direction of the N pole rotating shaft 30.In this embodiment, the operating mechanism 100, including the energy storage spring 4, the first crank 14, the first connecting rod 16, the second connecting rod 19, the second crank 21, the third connecting rod 23, the third crank 25, and the fourth connecting rod 29, all adopt two sets of symmetrical structures connected in parallel. This helps to reduce the number of parts, reduce the positional error of the operating mechanism 100 caused by the movement of multiple links, ensure the reliability of the hinge movement coordination and the consistency of the action of each breaking unit of the circuit breaker. When applied to a circuit breaker, it has an important impact on improving the overall performance of the circuit breaker.

[0104] The following will combine Figures 4a-6c As shown, the switching process of the operating mechanism 100 between the open state, the tripped state, and the closed state is described in detail below:

[0105] like Figures 4b-4c As shown in 5b-5c and 6b-6c, the two ends of the swing stroke of the rocker arm 3 of the rocker arm assembly are the first end and the second end, respectively. The rocker arm 3, at both ends of its swing stroke, is respectively limited by the two side walls of the V-groove of the bracket 1. The two ends of the energy storage spring 4 are the first end and the second end, respectively, and are connected to the rocker arm assembly and the eighteenth shaft 18a. Specifically, as... Figures 4b-4c As shown in directions 5b-5c and 6b-6c, the first end of the stroke and the second end of the stroke are the right end and the left end of the swing stroke of the rocker arm 3, respectively. The upper end of the energy storage spring 4 is the first end of the energy storage spring, and the lower end is the second end of the energy storage spring.

[0106] like Figures 6a-6c As shown, when the operating mechanism 100 is in the closed state, the rocker arm 3 swings to the second end of its stroke and drives the first end of the energy storage spring to rotate around the second end of the energy storage spring to store energy. The energy storage is at its maximum when the energy storage spring 4 reaches the first dead point position. After the energy storage spring 4 rotates past the first dead point position, the energy storage spring 4 releases energy, driving the first crank 14 to rotate in the second direction and driving the rocker arm 3 to swing to the second end of its stroke. The first crank 14 drives the slider 18 to slide along the slide rail 1-0 from the closed position to the open position through the first connecting rod 16. The slider 18 is in a limiting cooperation with the slide rail 1-0 at the closed position (the slider 18 is preferably in a straight position with the slide rail 1-0 at the open position). The upper end of the shaped hole is limited to prevent the slider 18 from sliding further. At the same time, the slider 18 drives the second crank 21 to rotate in the second direction through the second connecting rod 19. The second crank 21 drives the third crank 25 to rotate in the second direction through the third connecting rod 23. The third crank 25 drives the phase pole shaft 39 to rotate in the breaking direction so that the phase pole moving contact 41 is separated from the corresponding stationary contact 111. The phase pole moving contact 41 is preferably limited by the phase pole housing in the breaking position. At the same time, the second crank 21 drives the N pole shaft 30 to rotate in the breaking direction (preferably the second direction) through the fourth connecting rod 29, so that the N pole moving contact 91 is separated from the N pole stationary contact 92. Specifically, in combination with Figures 6a-6cAs shown, when the operating mechanism 100 switches from the closed position to the open position, the slider 18 moves upward along the slide rail 1-0 until the slider 18 moves to the upper end of the slide rail 1-0 (that is, the closed position of the slider 18) and engages with its limit to prevent the slider 18 from sliding further. The second direction is counterclockwise. The axis of the energy storage spring 4 is the first axis. When the energy storage spring 4 is in the first dead point position, the energy storage spring 4 reaches the maximum value and the eighth center 8S is located on the first axis. At the same time that the energy storage spring 4 rotates around the second end of the energy storage spring through the first dead point position, the first axis rotates through the eighth center 8S. Therefore, the eighth center 8S can also be regarded as the first dead point position. That is to say, the first axis of the energy storage spring 4 rotating through the eighth center 8S is also the energy storage spring 4 rotating through the first dead point position.

[0107] The operation process of the operating mechanism 100 switching from the open state to the closed state is as follows:

[0108] When the operating mechanism 100 is in the open position, the rocker arm 3 swings towards the first end of its stroke and drives the first end of the energy storage spring to rotate around the second end of the energy storage spring. When the energy storage spring 4 passes the first dead point, the energy storage spring 4 releases energy and drives the first crank 14 to rotate in the first direction, so that the crank limiting part 15 engages with the jump fastener 7 to prevent the first crank 14 from rotating in the first direction. At the same time, the energy storage spring 4 drives the rocker arm 3 to swing to the first end of its stroke, and the first crank 14 drives the slider 18 to slide along the slide rail 1-0 from the open position to the closed position through the first connecting rod 16. 8. The second crank 21 is driven to rotate in the first direction by the second connecting rod 19. The second crank 21 drives the third crank 25 to rotate in the first direction through the third connecting rod 23. The third crank 25 drives the phase pole shaft 39 to rotate in the closing direction (preferably the first direction) so that the phase pole moving contact 41 closes with the corresponding phase pole stationary contact 111. At the same time, the second crank 21 drives the N pole shaft 30 to rotate in the breaking direction (preferably the first direction) through the fourth connecting rod 29 so that the N pole moving contact 91 disconnects from the N pole stationary contact 92. The first direction and the second direction are opposite to each other. Specifically, when the operating mechanism 100 switches from the open state to the closed state, the slider 18 moves downward from the open position along the slide rail 1-0 to the closed position. The first direction is clockwise.

[0109] like Figures 4a-4c As shown in Figures 6a-6c, the process by which the operating mechanism 100 switches from the closed state to the tripped state (i.e., the tripped opening state) is as follows:

[0110] like Figures 6a-6cAs shown, when the operating mechanism 100 is in the closed state, an external force (such as the force exerted by the transmission jump buckle 32 on the re-fastener 9 as described below) drives the re-fastener 9 to rotate and release its limiting engagement with the locking buckle 10. The locking buckle 10 rotates and releases its locking engagement with the jump buckle 7. Under the action of the energy storage spring 4, the rocker arm of the rocker arm assembly swings to the second end of its stroke to the disengaged position, and the jump buckle 7 rotates in the second direction, driving the first crank 14 to rotate synchronously until the jump buckle 7 engages with the reset structure 6 of the rocker arm assembly. The first crank 14 drives the slider 18 to slide along the slide rail 1-0 from the closed position to the open position through the first connecting rod 16. During the process, the eighth center 8S remains on the same side of the axis of the energy storage spring 4. Simultaneously, the slider 18 drives the second crank 21 to rotate in the second direction via the second connecting rod 19. The second crank 21 drives the third crank 25 to rotate in the second direction via the third connecting rod 23. The third crank 25 drives the phase pole shaft 39 to rotate in the breaking direction (preferably the second direction) to break the phase pole moving contact 41 from the corresponding phase pole stationary contact 111. Simultaneously, the second crank 21 drives the N pole shaft 30 to rotate in the breaking direction (preferably the second direction) via the fourth connecting rod 29, breaking the N pole moving contact 91 from the N pole stationary contact 92. The operating mechanism 100 then switches to the following position. Figures 4a-4c The tripped state shown is also the tripped open state. Specifically, when the operating mechanism 100 switches from the closed state to the tripped state, the slider 18 moves upward along the slide rail 1-0 from the closed position to the open position.

[0111] like Figures 4a-5c As shown, the specific process of the operating mechanism 100 switching from the tripped state to the open state is as follows:

[0112] The operating mechanism 100 is in the position of Figures 4a-4c When the tripping state is as shown, such as Figures 5b-5cAs shown, an external force (e.g., manual operation by the operator) drives the rocker arm 3 to swing to the second end of its stroke, releasing the external force applied to the re-fastener 9 to release its limiting engagement with the locking fastener 10 (e.g., the force exerted on the re-fastener 9 by the transmission jump buckle 32 described below). This, combined with the torsion spring 11, drives the locking fastener 10 and the re-fastener 9 to reset, restoring their limiting engagement. Simultaneously, the rocker arm 3, through the reset structure 6, drives the jump buckle 7 to rotate in the first direction until it re-engages with the locking fastener 10. The jump buckle 7, through the first crank 14 and the first connecting rod 16, drives the slider 18 on the slide rail. The 1-0 mechanism rotates from the open position to the closed position but does not reach the closed position, then moves back to the open position. Simultaneously, the slider 18 drives the second crank 21 via the second connecting rod 19. The second crank 21 drives the third crank 25 via the third connecting rod 23, first rotating in the first direction and then in the second direction. The third crank 25 drives the phase pole shaft 39 from the disconnected position to the closed direction but does not close with the phase pole stationary contact 111, then rotates in the disconnected direction to the disconnected position. After removing the external force driving the rocker arm 3 to swing, the operating mechanism 100 switches to the open state. Specifically, as shown... Figures 5b-5c As shown, when the operating mechanism 100 re-engages from the disengaged state, an external force drives the rocker arm 3 to rotate clockwise. The reset structure 6 of the rocker arm assembly drives the jump fastener 7 to rotate clockwise around the first center 1S. The jump fastener 7 drives the slider 18 to move slightly downward along the slide rail 1-0 via the first crank 14 and the first connecting rod 16, but it will not move to the closed position. Then, the rocker arm 3 drives the energy storage spring 4 to rotate clockwise around the second end of the energy storage spring, causing the axis of the energy storage spring 4 to rotate past the eighth center 8S. The energy storage spring 4 then drives the first crank 14 to rotate counterclockwise around the eighth center 8S. The slider 18 is driven by the first connecting rod 16 to slide downward along the slide rail 1-0, but before reaching the closed position, it slides upward to the open position. At the same time, the slider 18 drives the second crank 21 through the second connecting rod 19. The second crank 21 drives the third crank 25 through the third connecting rod 23 to rotate clockwise by a small angle and then rotate counterclockwise to return to the original position. The third crank 25 drives the phase pole shaft 39 to rotate slightly from the open position to the closed position. The phase pole moving contact 41 will not close with the phase pole stationary contact 111. Then, the phase pole shaft 39 rotates back to the open position under the drive of the third crank 25.

[0113] After the operating mechanism 100 is tripped from the closed state or opened, the phase drive shaft 28 is limited by the bracket 1 to prevent the phase shaft 39 from rotating further, the nineteenth shaft 19a is limited by the bracket 1 to prevent the second crank 21 from rotating further, and the slider 18 is limited by the guide rail 1-0 to prevent the slider 18 from moving further. The above three processes theoretically occur simultaneously, but due to actual processing errors, it is difficult for the above three processes to be carried out simultaneously. In this embodiment, ensuring that the nineteenth shaft 19a is limited before the other two (phase drive shaft 28 and slider 18) is beneficial to increasing the torque of the energy storage spring 4 in overcoming the friction of the shaft (that is, the phase shaft 39 and / or the N-pole shaft 30) when the circuit is closed.

[0114] like Figure 2-13 As shown, the operating mechanism 100 further includes a first traction rod 34 and a transmission jump buckle 32 that are engaged with each other and rotatably disposed. The phase disconnection unit further includes a thermomagnetic tripping mechanism 105. When an overload or short circuit fault occurs in the circuit where the phase disconnection unit is located, the thermomagnetic tripping mechanism 105 drives the first traction rod 34 to rotate and release the engagement with the transmission jump buckle 32. The transmission jump buckle 32 then rotates and drives the operating mechanism 100 to disengage. Further, after the first traction rod 34 and the transmission jump buckle 32 release their engagement, the transmission jump buckle 32 drives the re-fastener 9 to rotate and release its limiting engagement with the locking element 10. The locking element 10 then rotates and releases its engagement with the jump buckle 7, causing the operating mechanism 100 to disengage.

[0115] like Figure 2 , 4c As shown in 5c and 6c, the first traction rod 34 is rotatably mounted on the bracket 1 about the fifth center 5S, and the transmission buckle 32 is rotatably mounted on the bracket 1 about the seventh center 7S. Further, the first traction rod 34 is rotatably mounted on the bracket 1 via a fifth axis 5a whose axis coincides with the fifth center 5S, and the transmission buckle 32 is rotatably mounted on the seventh axis 7a. Further, the first traction rod 34 and the transmission buckle 32 are preferably located between the two bracket side plates of the bracket 1.

[0116] The first traction rod 34 includes a first traction rod hook, and the transmission buckle 32 includes a transmission buckle hook. The first traction rod hook and the transmission buckle hook are opposite to each other and are engaged.

[0117] like Figure 2 and 3As shown, the operating mechanism 100 also includes a first traction rod return spring 36 and a transmission jump buckle return spring 33. The first traction rod return spring 36 applies a force to the first traction rod 34, and the transmission jump buckle return spring 33 applies a force to the transmission jump buckle 32, so that the first traction rod 34 and the transmission jump buckle 32 maintain a latching engagement. Preferably, the hook of the first traction rod and the hook of the transmission jump buckle have a tendency to move towards each other, so that the two are securely latched together. Furthermore, the first traction rod return spring 36 is preferably a tension spring, with one end connected to the first traction rod 34 and the other end connected to the bracket 1 (the two bracket side plates of the bracket 1 are connected by a side plate connecting rod 37, and the "other end" is connected to the side plate connecting rod 37); the transmission jump buckle return spring 32 is preferably a torsion spring, sleeved on the seventh shaft 7a, with one end cooperating with the bracket 1 and the other end cooperating with the transmission jump buckle 32. After the transmission jump buckle 32 and the first traction rod 34 are released from the latching engagement, the transmission jump buckle 32 is driven to rotate to drive the re-fastener 9 to rotate, so that the re-fastener 9 and the locking fastener 10 are released from the limiting engagement.

[0118] like Figure 3 As shown, the operating mechanism 100 also includes a first traction rod limiting shaft 38 disposed on the bracket 1. After the first traction rod 34 and the transmission jump buckle 32 are released from their latching engagement, the first traction rod reset spring 36 drives the first traction rod 34 to rotate and abut against the first traction rod limiting shaft 38, in preparation for the transmission jump buckle 32 and the first traction rod 34 to restore their latching engagement.

[0119] like Figure 4a , 5a As shown in Figures 6a, 10, and 12, the thermomagnetic tripping mechanism 105 further includes a second traction rod 72 rotatably arranged around the eleventh center 11S. The axial direction of the second traction rod 72 is preferably the same along the parallel direction of each phase-pole tripping unit. Each phase-pole tripping unit's thermomagnetic tripping mechanism 105 shares the second traction rod 72. The second traction rod 72 is connected to the first traction rod 34 via a transmission link 113 to drive its rotation. Furthermore, the transmission tripping buckle 32, the first traction rod 34, and the second traction rod 72 are arranged side-by-side on one side of the operating mechanism 100 in the horizontal direction.

[0120] like Figure 12 As shown, the two ends of the second traction rod 72 are preferably rotatably mounted on the phase pole housings of the two sets of phase pole disconnection units 101 arranged opposite each other. As another embodiment, the second traction rod 72 can also be mounted on the bracket 1 of the operating mechanism 100.

[0121] like Figure 12-13As shown, the thermomagnetic tripping mechanism 105 includes a magnetic yoke 68, an armature 69, an armature transmission component 70, a bimetallic element 74, a conductive plate 67, and an armature return spring 71. The armature 69 is rotatably mounted on the magnetic yoke 68 around a sixteenth center 16S, and the armature transmission component 70 is rotatably mounted on the magnetic yoke 68 around a seventeenth center 7S. The sixteenth center 16S and the seventeenth center 7S are arranged in parallel and spaced apart. The conductive plate 67 passes between the magnetic yoke 68 and the armature 69. The bimetallic element 74 is electrically connected to the conductive plate 67. The conductive plate 67 is connected in series with the contact system of the phase pole disconnection unit. The armature return spring 71 cooperates with the armature 69 to separate the armature 69 from the magnetic yoke 68. Further, the armature transmission component 70 is rotatably mounted on the magnetic yoke 68 via an armature transmission component shaft 76, and the armature 69 is rotatably mounted on the magnetic yoke 68 via an armature shaft 75. The armature return spring 71 is a torsion spring sleeved on the armature 75. Furthermore, the conductive plate 67 is the inlet conductive plate of the phase pole breaking unit, and is electrically connected to the phase pole conductive component 40 of the phase pole rotating shaft mechanism.

[0122] In this invention, when a short circuit occurs in the circuit containing the phase-pole breaking unit, the moving contact 41 of the phase pole is repelled by the electric repulsive force between the moving contact 41 and the stationary contact 111 of the phase pole, driving the first traction rod 34 to rotate and disengage from the transmission trip latch 32, thereby achieving rapid tripping of the circuit breaker. Specifically: Figure 8b and 11 As shown, the phase pole disconnection unit 101 further includes a first transmission structure 47, a second transmission structure 65, and a third transmission structure 66. The first transmission structure 47 is rotatably arranged around the second phase pole contact spring 46 of the phase pole rotating shaft mechanism. The second transmission structure 65 includes a second transmission shaft and a second transmission arm. The second transmission arm is arranged on the second transmission shaft and rotates synchronously with it. The third transmission structure 66 includes a third transmission arm and a third drive shaft. One end of the third transmission arm is connected to the second transmission shaft and rotates synchronously, and the other end is provided with the third drive shaft. The first drive arm is in transmission cooperation with the phase pole moving contact 41 and the second transmission arm, respectively. When the phase pole moving contact 41 is repelled by the electric repulsive force, it drives the first transmission structure 47 to rotate around the second phase pole contact spring 46. The first transmission structure 47 drives the second transmission arm to rotate around the second transmission shaft. The second transmission shaft drives the third transmission arm to rotate. The third transmission arm drives the first traction rod 34 to rotate through the third drive shaft, thereby releasing the latching cooperation with the transmission jump buckle 32. Furthermore, the second transmission shaft is inserted into the housing of the phase pole breaking unit by rotating around the tenth center 10S, so that the third transmission structure 66 is located outside the phase pole breaking unit, and the second transmission arm of the first transmission structure 47 and the second transmission structure 65 is located inside the phase pole breaking unit, thereby improving the insulation performance and ensuring electrical safety.

[0123] The present invention also includes a fast trip device 96 (as shown in Figure 6). The fast trip state includes an operating mechanism 100, a transmission trip lever 32, a first traction rod 34, a third transmission structure 66, a second transmission structure 65, a first transmission structure 47, and a phase pole rotating shaft mechanism. When a short circuit fault occurs in the circuit where the phase pole disconnection unit is located, the operating mechanism 100 is driven to quickly trip and trip, thereby achieving short circuit protection.

[0124] The circuit breaker of this invention, with its phase pole contact spring 44 of phase pole rotating shaft mechanism, phase pole moving contact 41 of phase pole repulsion self-locking function, fast tripping device 96, and thermomagnetic tripping mechanism 105, realizes three-stage protection. While ensuring the normal protection function of thermomagnetic tripping mechanism 105, it further improves the unlocking speed of operating mechanism 100 when interrupting current. The contact repulsion self-locking function adds a safety guarantee for the circuit breaker to interrupt current. Even if the interruption fails, it avoids the risk of secondary short circuit caused by contact falling. The combined effect of the three improves the overall breaking performance of the circuit breaker.

[0125] In the circuit breaker of the present invention, when the operating mechanism 100 is re-engaged from the disengaged state, the handle 2 of the rocker arm assembly drives the transmission jump buckle 32 to reset and resume the latching engagement with the first traction rod 34. The re-fastening member 9 and the locking member 10 are reset under the action of the locking member torsion spring 11. At the same time, the reset structure 6 of the rocker arm assembly drives the jump buckle 7 to resume the latching engagement with the locking member 10.

[0126] In the circuit breaker of the present invention, the first center 1S to the eighth center 8S, the tenth center 10S, the eleventh center, the thirteenth center 13S, the fifteenth center 15S to the twenty-fourth center 24S are arranged parallel to each other, and each center is perpendicular to the horizontal and vertical directions of the operating mechanism 100.

[0127] The following will combine Figure 10 , 14 As shown in -17b, the phase pole arc extinguishing system 94 will be described.

[0128] The phase-pole arc-extinguishing system 94 has multiple implementation methods, including at least the following: Figures 15a-17b The three implementation methods shown share the following common structure:

[0129] 1. The phase-pole arc extinguishing system 94 includes a main arc extinguishing chamber 94-1 and a secondary arc extinguishing chamber 94-2 with their arc inlets facing each other, and an arc-initiating component 50; the arc-initiating component 50 includes an arc-initiating component body 50-0 disposed between the arc inlets of the main arc extinguishing chamber 94-1 and the secondary arc extinguishing chamber 94-2 (the opposite ends of the main arc extinguishing chamber 94-1 and the secondary arc extinguishing chamber 94-2 are respectively the arc inlets of the main arc extinguishing chamber 94-1 and the secondary arc extinguishing chamber 94-2), and an arc-initiating component main arc-initiating plate 50-1 and an arc-initiating component secondary arc-initiating plate 50-2 respectively connected to the arc-initiating component body 50-0. The arc-initiating component body 50-0 is also connected to the phase-pole moving contact 41 and the phase-pole stationary contact 111 to form a break. With the openings (OD) opposite each other, the main arc-starting plate 50-1 of the arc-starting element extends to the side of the main arc-extinguishing chamber 94-1 away from the phase pole contact system 93, and the auxiliary arc-starting plate 50-2 of the arc-starting element extends to the side of the auxiliary arc-extinguishing chamber 94-2 away from the phase pole contact system 93. In other words, the main arc-starting plate 50-1 is located on one side of the main arc-extinguishing chamber 94-1 in the parallel direction of each arc-extinguishing grid plate, and the auxiliary arc-starting plate 50-2 is located on one side of the auxiliary arc-extinguishing chamber 94-2 in the parallel direction of each arc-extinguishing grid plate. The main arc-starting plate 50-1 and the auxiliary arc-starting plate 50-2 are located on the same side of the main arc-extinguishing chamber 94-1 and the auxiliary arc-extinguishing chamber 94-2. Further, as... Figure 17a As shown, when the phase pole moving contact 41 and the phase pole stationary contact 111 are disconnected, the phase pole stationary contact 111 and the main arc-starting plate 50-1 of the arc-starting element are located on both sides (preferably the upper and lower sides) of the main arc-extinguishing chamber 94-1, respectively, and the free end of the phase pole moving contact 41 and the auxiliary arc-starting plate 50-2 of the arc-starting element are located on both sides (preferably the upper and lower sides) of the auxiliary arc-extinguishing chamber 94-2, respectively. The phase-pole arc extinguishing system 94 includes a main arc extinguishing chamber 94-1 and a secondary arc extinguishing chamber 94-2. It makes full use of the internal space of the phase-pole breaking unit, increases the number, length, surface area, thickness and gap of the arc extinguishing grids, which is beneficial for the cooling and cutting of the arc, prevents the possibility of short circuits caused by excessive temperature or large particle blockage, and improves the heat capacity of the phase-pole arc extinguishing system 94. The main arc extinguishing chamber 94-1 and the secondary arc extinguishing chamber 94-2 are connected in series by an arc ignition element 50. The arc ignition element improves the utilization rate of the arc extinguishing grids at the bottom of the two arc extinguishing chambers, plays a role in arc running and arc pulling, further cools the arc to increase the arc voltage and reduce the arc conductivity, and plays a role in arc ignition, which is conducive to the arc entering the two arc extinguishing chambers and quickly limiting the current.

[0130] Both the main arc-extinguishing chamber 94-1 and the auxiliary arc-extinguishing chamber 94-2 include a grid plate group 49, which comprises multiple arc-extinguishing grid plates 490 arranged side-by-side at intervals. Preferably, the arc-extinguishing grid plates 490 of each grid plate group 49 are arranged side-by-side along the vertical direction of the operating mechanism 100. Furthermore, the grid plate groups 49 of the main arc-extinguishing chamber 94-1 and the auxiliary arc-extinguishing chamber 94-2 have a symmetrical structure, and the arc-extinguishing grid plates 490 of the same grid plate group 49 are parallel to each other.

[0131] 2. The phase-electrode arc-extinguishing chamber 94 further includes a main arc-extinguishing chamber arc-starting plate 52 and a secondary arc-extinguishing chamber arc-starting plate 53. The main arc-extinguishing chamber arc-starting plate 52 and the arc-starting component main arc-starting plate 50-1 are arranged opposite to each other on both sides of the main arc-extinguishing chamber 94-1 (e.g., Figures 15a-17b The direction shown is preferably the upper and lower sides. In other words, the main arc-extinguishing chamber arc-starting plate 52 and the arc-starting component main arc-starting plate 50-1 are arranged opposite each other and are located on both sides of the main arc-extinguishing chamber 94-1 in the parallel direction of each arc-extinguishing grid plate. The main arc-extinguishing chamber arc-starting plate 52 is preferably located between the main arc-extinguishing chambers 94-1 of the phase pole stationary contact 111; the auxiliary arc-extinguishing chamber arc-starting plate 53 and the arc-starting component auxiliary arc-starting plate 50-2 are arranged opposite each other on both sides of the auxiliary arc-extinguishing chamber 94-2 (e.g., the upper and lower sides). Figures 15a-17b As shown in the direction, preferably the upper and lower sides), in other words, the auxiliary arc-extinguishing chamber arc-starting plate 53 and the arc-starting component auxiliary arc-starting plate 50-2 are located on both sides of the auxiliary arc-extinguishing chamber 94-2 in the parallel direction of each arc-extinguishing grid plate of the auxiliary arc-extinguishing chamber 94-2. The auxiliary arc-extinguishing chamber arc-starting plate 53 is preferably located between the phase pole rotating shaft mechanism and the auxiliary arc-extinguishing chamber 94-2, and is arranged at intervals relative to the main arc-extinguishing chamber arc-starting plate 52.

[0132] 3. The phase pole arc extinguishing system 94 also includes a magnetic blow-out structure. The magnetic blow-out structure increases the magnetic field strength at the installation location, improves the electrodynamic force of the phase pole moving contact 41, accelerates the speed at which the arc is generated, enters the main arc extinguishing chamber 94-1 and the auxiliary arc extinguishing chamber 94-2, and finally leaves the phase pole arc extinguishing system 94, shortens the arc burning time, and improves the arc extinguishing efficiency and performance. The magnetic blow-out structure includes a first magnetic plate 57, a second magnetic plate 58, a third magnetic plate 59, a fourth magnetic plate 60, a fifth magnetic plate 61, a sixth magnetic plate 61, and a seventh magnetic plate 63. The first magnetic plate 57 and the third magnetic plate 59 are arranged opposite each other on both sides of the main arc extinguishing chamber 94-1 and are located between the main arc ignition plate 51 of the arc ignition element and the phase pole contact system 93. The main body 50-0 and the third magnetic plate 59 form a U-shaped structure that surrounds the main arc-extinguishing chamber 94-1. The second magnetic plate 58 and the fourth magnetic plate 60 are arranged opposite each other on both sides of the auxiliary arc-extinguishing chamber 94-2 and are located between the auxiliary arc-starting plate 52 of the arc-starting component and the phase pole contact system 93. The second magnetic plate 58, the main body 50-0 of the arc-starting component and the fourth magnetic plate 60 form a U-shaped structure that surrounds the auxiliary arc-extinguishing chamber 94-2. The fifth magnetic plate 61 and the sixth magnetic plate 62 are arranged opposite each other on both sides of the disconnection port 0D. The seventh magnetic plate 63 is arranged between the fifth magnetic plate 61 and the sixth magnetic plate 62 near the end of the phase pole stationary contact 111. The fifth magnetic plate 61, the sixth magnetic plate 62 and the seventh magnetic plate 63 form a U-shaped structure that surrounds the disconnection port OD. Furthermore, the phase-pole arc-extinguishing system 94 also includes a first insulating plate 56-1, a second insulating plate 56-2, a third insulating plate 109, and a fourth insulating plate 110. The first insulating plate 56-1 is disposed between the first magnetic plate 57 and the main arc-extinguishing chamber 94-1, and between the second magnetic plate 58 and the auxiliary arc-extinguishing chamber 94-2. The second insulating plate 56-2 is disposed between the third magnetic plate 59 and the main arc-extinguishing chamber 94-1, and between the fourth magnetic plate 60 and the auxiliary arc-extinguishing chamber 94-2. The third insulating plate 109 and the fourth insulating plate 110 are respectively disposed on both sides of the fifth magnetic plate 61 and the sixth magnetic plate 62. The above structural design is beneficial to improving insulation performance. Furthermore, the first phase pole half-shell 106 and the second phase pole half-shell 107 of the phase pole housing are respectively provided with fifth magnetic plate limiting holes and sixth magnetic plate limiting holes for limiting the fifth magnetic plate 61 and the sixth magnetic plate 62. The third insulating plate 109 and the fourth insulating plate 110 are respectively disposed on both sides of the first phase pole half-shell 106 and the second phase pole half-shell 107 and respectively fixed on the two to respectively shield the fifth magnetic plate limiting holes and the sixth magnetic plate limiting holes.

[0133] The phase-pole arc extinguishing system 94 preferably includes two arc extinguishing baffles 51 arranged opposite each other, a main arc extinguishing chamber 94-1 and a secondary arc extinguishing chamber 94-2 arranged between the two arc extinguishing baffles 51, and arc extinguishing grid plates of the main arc extinguishing chamber 94-1 and the secondary arc extinguishing chamber 94-2 respectively fixedly connected to the two arc extinguishing baffles 51, and a first insulating plate 56-1 and a second insulating plate 56-2 respectively located on both sides of the two arc extinguishing baffles 51.

[0134] 4. The phase-pole arc-extinguishing system 94 further includes a main isolation barrier 54 and a secondary isolation barrier 55, which are respectively disposed at the air outlets of the main arc-extinguishing chamber 94-1 and the secondary arc-extinguishing chamber 94-2, and are located on both sides of the secondary arc-extinguishing chamber 94-2 of the main arc-extinguishing chamber 94-1. The main arc-extinguishing chamber 94-1 and the secondary arc-extinguishing chamber 94-2 are connected to the external environment of the phase-pole breaking unit through the main isolation barrier 54 and the secondary isolation barrier 55, respectively. Furthermore, the main isolation barrier 54 and the secondary isolation barrier 55 are respectively fixed to a pair of side walls of the phase-pole housing, which can effectively prevent large charged particles from being ejected onto the equipment around the circuit breaker, causing short circuits and fires, and plays a role in eliminating ionization.

[0135] 5. The main body 50-0 of the arc-starting component includes a first main body portion 50-0a opposite to the arc inlet of the main arc-extinguishing chamber 94-1 and a second main body portion 50-0b opposite to the arc inlet of the auxiliary arc-extinguishing chamber 94-2. One end of the first main body portion 50-0a is connected to one end of the main arc-starting plate 50-1 of the arc-starting component, and the other end is connected to one end of the second main body portion 50-0b. The other end of the second main body portion 50-0b is connected to the auxiliary arc-starting plate 50-2 of the arc-starting component. Furthermore, the first main body portion 50-0a and the second main body portion 50-0b have a symmetrical structure.

[0136] 6. The main body 50-0 of the arc-starting component also includes an arc-starting end located between the main arc-extinguishing chamber arc-starting plate 52 and the auxiliary arc-extinguishing chamber arc-starting plate 53, such as... Figures 16a-16bAs shown, the minimum distance between the phase pole moving contact 41 and the arc-starting end during the movement from the closed position to the open position is greater than the distance between the arc-starting component body 50-0 and the main arc-extinguishing chamber 64-1, the distance between the arc-starting component body 50-0 and the auxiliary arc-extinguishing chamber 94-2, the distance between the main arc-starting plate 50-1 and the main arc-extinguishing chamber 94-1, and the distance between the auxiliary arc-starting plate 50-2 and the auxiliary arc-extinguishing chamber 94-2. In this invention, when a short-circuit current flows through the phase-pole breaking unit, the phase-pole moving contact 41 is repelled by an electric repulsion force, generating an arc between the phase-pole moving contact 41 and the phase-pole stationary contact 111. The arc root is transferred to the main arc-extinguishing chamber 94-1 under the action of airflow and the arc-starting plate 52. When the phase-pole moving contact 41 is opened to be opposite the arc-starting element body 50-0, the distance between the phase-pole moving contact 41 and the arc-starting end reaches the minimum distance, and the phase-pole moving contact 41 will preferentially discharge to this point, generating a strong electric field between the arc-starting element 50 and the arc-starting plate 52 of the main arc-extinguishing chamber. Under the action of airflow and magnetic field, the arc is driven along the arc-starting element 50. The arc rapidly enters the main arc-extinguishing chamber 94-1 and is cut by the grid plate group 49 of the main arc-extinguishing chamber 94-1. When the phase pole moving contact 41 is repelled to the breaking position, the gap between the phase pole moving contact 41 and the arc-initiating plate 53 of the auxiliary arc-extinguishing chamber is the smallest, and the arc is transferred to the arc-initiating plate 53 of the auxiliary arc-extinguishing chamber. Since the arc-initiating element 50 already has a potential, there is still a strong electric field between the arc-initiating plate 53 of the auxiliary arc-extinguishing chamber and the arc-initiating element 50. Under the action of airflow and magnetic field, the arc is driven into the auxiliary arc-extinguishing chamber 94-2 and cut by the grid plate group 49 of the auxiliary arc-extinguishing chamber 94-2. Under the combined action of the main and auxiliary arc-extinguishing chambers, the circuit quickly limits the current and the arc is quickly extinguished.

[0137] 7. The arc-initiating component 50 is provided with an arc-initiating component pin on the side edge facing the arc-extinguishing baffle 51, which is inserted and cooperates with the arc-extinguishing baffle 51, so as to improve the installation reliability of the arc-initiating component 50.

[0138] like Figures 15a-15b The image shows a first embodiment of the phase-pole arc-extinguishing system 94:

[0139] The phase pole arc extinguishing system 94 of the first embodiment has an arc-initiating component body 50-0 with an inverted V-shaped structure. The two ends of the arc-initiating component body 50-0 are respectively connected to the main arc-initiating plate 50-1 and the auxiliary arc-initiating plate 50-2 of the arc-initiating component. The bend of the inverted V-shaped structure of the arc-initiating component body 50-0 is the arc-initiating end.

[0140] like Figures 16a-16b The image shows a second embodiment of the phase-pole arc-extinguishing system 94:

[0141] The phase-polar arc extinguishing system 94 of the second embodiment includes an arc-initiating component body 50-0 comprising an arc-running track structure 50-01 connected to the main arc-initiating plate 50-1 and the auxiliary arc-initiating plate 50-2 of the arc-initiating component. The arc-running track structure 50-01 includes arc-running plates 50-010 arranged side-by-side at intervals and arc-running plate connecting portions 50-011. Each arc-running plate 50-010 is connected end-to-end through the arc-running plate connecting portions 50-011. Preferably, the arc-running track structure is a serpentine structure. Further, the arc-running plates 50-010 are arranged parallel to each other, and the arc-running plate connecting portions 50-011 are preferably arc-shaped plate structures.

[0142] U-shaped arc-extinguishing cavities 50-012 are formed between adjacent arc-running plates 50-010. The opening ends of each U-shaped arc-extinguishing cavity 50-012 alternately face the arc inlet of the main arc-extinguishing chamber 94-1 and the auxiliary arc-extinguishing chamber 94-2. In other words, for each consecutively arranged U-shaped arc-extinguishing cavity 50-012, if the opening of the previous one faces the arc inlet of the main arc-extinguishing chamber 94-1, the opening of the next one faces the arc inlet of the auxiliary arc-extinguishing chamber 94-2, or if the opening of the previous one faces the arc inlet of the auxiliary arc-extinguishing chamber 94-2, the opening of the next one faces the arc inlet of the main arc-extinguishing chamber 94-1. Furthermore, the plane where the arc-running plates 50-010 are located is parallel to the plane where the arc-extinguishing grid plates 490 of the main arc-extinguishing chamber 94-1 and the auxiliary arc-extinguishing chamber 94-2 are located.

[0143] At least one of the first main body portion 50-0a and the second main body portion 50-0b is provided with a running arc structure 50-01. Furthermore, both the first main body portion 50-0a and the second main body portion 50-0b are provided with the running arc structure 50-01. Furthermore, the first main body portion 50-0a and the second main body portion 50-0b are symmetrical structures.

[0144] The arc-initiating component body 50-0 also includes a main cap 50-00 with an inverted V-shaped structure. The two ends of the main cap 50-00 are connected to the first main body part 50-0a and the second main body part 50-0b of the arc-initiating component body 50-00, respectively. The bend in the middle of the main cap is the arc-initiating end. Further, the arc-running plate 50-010 of the arc-running track structure 50-01 of the first main body part 50-0a, which is connected to the main cap 50-00, is the first arc-running plate. The arc-running plate 50-010 of the second main body part 50-0b, which is connected to the main cap 50-00, is the second arc-running plate. The first arc-running plate and the second arc-running plate are coplanar. The end of the first arc-running plate near the main arc-extinguishing chamber 94-1 and the end of the second arc-running plate near the auxiliary arc-extinguishing chamber 94-2 are connected to the two ends of the main cap 50-00, respectively.

[0145] In another embodiment, the opposite ends of the first and second arc plates are respectively connected to the two ends of the main body cap 50-00, and the opening of the V-shaped structure of the main body cap 50-00 is opposite to the gap between the first main body part 50-0a and the second main body part 50-0b.

[0146] The first main body part 50-0a and the second main body part 50-0b are each connected to the main arc-starting plate 50-1 and the auxiliary arc-starting plate 50-2 of the arc-starting component through an arc-starting component transition part 50-02, respectively.

[0147] In the arc-running track structure 50-01, the ends of each arc-running plate 50-010 furthest from the corresponding arc-extinguishing chamber (main arc-extinguishing chamber 94-1 or auxiliary arc-extinguishing chamber 94-2) are flush. The distance between the arc-running plate 50-010 and the corresponding arc-extinguishing chamber decreases progressively from the end closest to the main cap 50-00 (or phase pole contact system 93) to the end furthest from the main cap 50-00 (or phase pole contact system 93). In other words, in the two sets of arc-running track structures 50-01, the ends of the arc-running plates 50-010 of one set of arc-running track structures 50-01 that are flush with the end closest to the other set of arc-running track structures 50-01, and the distance between the other end and the corresponding arc-extinguishing chamber, gradually decreases from the side closest to the main cap 50-00 to the other side. Furthermore, the arc-initiating component main body 50-0 is generally shaped like a pagoda.

[0148] like Figures 17a-17b The diagram shows a third embodiment of the phase-polar arc-extinguishing system 94, which differs from the second embodiment in that:

[0149] In the third embodiment of the phase pole arc extinguishing system 94, the plane of the arc-running plate 50-010 of the arc-initiating component 50 is perpendicular to the plane of the arc-extinguishing grid plate 490 of the main arc-extinguishing chamber 94-1 and the auxiliary arc-extinguishing chamber 94-2; the two adjacent arc-running plates 50-010 of the first main body 50-0a and the second main body 50-0b are central arc-running plates. The two central arc-running plates are flush with one end of the phase pole contact system 93, protrude towards the side of the phase pole contact system 93 relative to the other arc-running plates 50-010, and are connected by the arc-running plate connecting part 50-011. The arc-running plate connecting part 50-011 is the central arc-running plate connecting part and is an arc-shaped plate. The midpoint of the central arc-running plate connecting part is the arc-initiating end.

[0150] The openings of each of the U-shaped arc-extinguishing cavities 50-012 alternately face the side where the phase pole contact system 93 is located and the side where the main arc-extinguishing plate 50-1 and the auxiliary arc-extinguishing plate 50-2 of the arc-extinguishing component are located. In other words, for each U-shaped arc-extinguishing cavity 50-012 arranged continuously side by side, the previous one faces the side where the phase pole contact system 93 is located, and the next one faces the side where the main arc-extinguishing plate 50-1 and the auxiliary arc-extinguishing plate 50-2 of the arc-extinguishing component are located, or the previous one faces the side where the main arc-extinguishing plate 50-1 and the auxiliary arc-extinguishing plate 50-2 of the arc-extinguishing component are located, and the next one faces the side where the phase pole contact system 93 is located.

[0151] It should be noted that the unfolded length of the arc-initiating component body 50-0 determines the actual arc extinguishing and arc-initiating effects. As the length of the arc track structure 50-01 increases, the arc pressure also increases. Therefore, the unfolded length of the arc-initiating component body 50-0 should be increased as much as possible within the limits of space.

[0152] In the main body 50-0 of the arc-initiating component, from the two central arc-running plates to both sides, the end of the arc-running plate 50-010 closest to the phase electrode contact system 93 gradually shifts away from the phase electrode contact system 93. That is to say, as Figure 17a As shown, from the two central arc-running plates to both sides, the upper end of the arc-running plate 50-010 gradually shifts downward.

[0153] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker comprising an operating mechanism (100) and at least one set of breaking units driven by the operating mechanism (100) to close and open, wherein at least one set of breaking units is a phase breaking unit (101) for a phase circuit; a rocker arm assembly of the operating mechanism (100) is located at one end of the operating mechanism (100) in the vertical direction; characterized in that: The phase pole breaking unit (101) includes a phase pole contact system (93) and a phase pole arc extinguishing system (94) arranged side by side along the vertical direction of the operating mechanism (100). The phase pole contact system (93) includes a phase pole rotating shaft mechanism and a phase pole stationary contact (111) located on one side of the operating mechanism (100) in the horizontal direction of the operating mechanism (100). The phase pole rotating shaft mechanism includes a phase pole moving contact (41) that cooperates with the phase pole stationary contact (111). The phase pole arc extinguishing system (94) includes a main arc extinguishing chamber (94-1) and a secondary arc extinguishing chamber (94-2) arranged opposite to each other at the arc inlet, an arc ignition element (50), and an arc ignition plate (52) for the main arc extinguishing chamber and an arc ignition plate (53) for the secondary arc extinguishing chamber. The arc ignition element (50) includes an arc ignition element body disposed between the arc inlets of the main arc extinguishing chamber (94-1) and the secondary arc extinguishing chamber (94-2). (50-0) and the main arc-starting plate (50-1) and the auxiliary arc-starting plate (50-2) of the arc-starting component, which are respectively connected to the main body (50-0) of the arc-starting component. The main body (50-0) of the arc-starting component is also opposite to the disconnection opening (OD) formed by the phase pole moving contact (41) and the phase pole stationary contact (111). The main arc-starting plate (50-1) of the arc-starting component extends to the main arc-extinguishing chamber (94-1) away from the phase pole contact system (94-1). 3) On one side, the arc-starting component secondary arc-starting plate (50-2) extends to the side of the secondary arc-extinguishing chamber (94-2) away from the phase pole contact system (93); the main arc-extinguishing chamber arc-starting plate (52) and the arc-starting component main arc-starting plate (50-1) are arranged opposite to each other on both sides of the main arc-extinguishing chamber (94-1), and the secondary arc-extinguishing chamber arc-starting plate (53) and the arc-starting component secondary arc-starting plate (50-2) are arranged opposite to each other on both sides of the secondary arc-extinguishing chamber (94-2).

2. The circuit breaker according to claim 1, characterized in that: The circuit breaker includes multiple sets of breaking units arranged in parallel, one set of breaking units being an N-pole breaking unit (102); The N-pole disconnecting unit (102) includes an N-pole contact system and an N-pole arc extinguishing system (940) arranged side by side along the horizontal direction of the operating mechanism (100). The N-pole contact system includes an N-pole rotating shaft mechanism and an N-pole stationary contact (92) used in conjunction. The operating mechanism (100) is mounted on the N-pole disconnecting unit (102) along its vertical direction. The N-pole moving contact mechanism and the phase pole rotating shaft mechanism are arranged side by side along the vertical direction of the operating mechanism (100) and their rotation axes are parallel.

3. The circuit breaker according to claim 2, characterized in that: The circuit breaker is a 2P+N type circuit breaker, with its two phase pole breaking units (101) distributed on both sides of the operating mechanism (100) and the N pole breaking unit (102).

4. The circuit breaker according to claim 1, characterized in that: The main body of the arc-initiating component (50-0) includes an arc-running track structure (50-01) connected to the main arc-initiating plate (50-1) and the auxiliary arc-initiating plate (50-2) of the arc-initiating component. The arc-running track structure (50-01) includes arc-running plates (50-010) arranged side by side at intervals and arc-running plate connecting parts (50-011). Each arc-running plate (50-010) is connected end to end through the arc-running plate connecting parts (50-011).

5. The circuit breaker according to claim 4, characterized in that: The running arc plates (50-010) are arranged in parallel to each other, and the running arc plate connecting part (50-011) is an arc plate structure.

6. The circuit breaker according to claim 4, characterized in that... The arc-starting component body (50-0) includes a first main body part (50-0a) opposite to the arc inlet of the main arc-extinguishing chamber (94-1) and a second main body part (50-0b) opposite to the arc inlet of the auxiliary arc-extinguishing chamber (94-2). One end of the first main body part (50-0a) is connected to one end of the main arc-starting plate (50-1) of the arc-starting component, and the other end is connected to one end of the second main body part (50-0b). The other end of the second main body part (50-0b) is connected to the auxiliary arc-starting plate (50-2) of the arc-starting component. At least one of the first main body part (50-0a) and the second main body part (50-0b) is provided with an arc-running track structure (50-01).

7. The circuit breaker according to claim 6, characterized in that: The first main body (50-0a) and the second main body (50-0b) are symmetrical structures, and both the first main body (50-0a) and the second main body (50-0b) are provided with a running track structure (50-01).

8. The circuit breaker according to claim 4, characterized in that: A U-shaped arc-extinguishing cavity (50-012) is formed between adjacent arc-extinguishing plates (50-010), and the opening end of each U-shaped arc-extinguishing cavity (50-012) alternately faces the arc inlet of the main arc-extinguishing chamber (94-1) and the auxiliary arc-extinguishing chamber (94-2).

9. The circuit breaker according to claim 8, characterized in that: The plane where the arc-running plate (50-010) is located is parallel to the plane where the arc-extinguishing grid plates (490) of the main arc-extinguishing chamber (94-1) and the auxiliary arc-extinguishing chamber (94-2) are located.

10. The circuit breaker according to claim 4, characterized in that: A U-shaped arc-extinguishing cavity (50-012) is formed between adjacent arc-running plates (50-010). The opening end of the U-shaped arc-extinguishing cavity (50-012) alternately faces the side where the phase pole contact system (93) is located and the side where the main arc-starting plate (50-1) and the auxiliary arc-starting plate (50-2) of the arc-starting component are located.

11. The circuit breaker according to claim 10, characterized in that: The plane where the arc-running plate (50-010) is located is perpendicular to the plane where the arc-extinguishing grid plates (490) of the main arc-extinguishing chamber (94-1) and the auxiliary arc-extinguishing chamber (94-2) are located.

12. The circuit breaker according to claim 4, characterized in that: The main body of the arc-starting component (50-0) also includes an arc-starting end located between the main arc-extinguishing chamber arc-starting plate (52) and the auxiliary arc-extinguishing chamber arc-starting plate (53). The minimum distance between the moving contact (41) and the arc-starting end during the movement from the closed position to the open position is greater than the distance between the main body of the arc-starting component (50-0) and the main arc-extinguishing chamber (94-1), the distance between the main body of the arc-starting component (50-0) and the auxiliary arc-extinguishing chamber (94-2), the distance between the main arc-starting plate (50-1) and the main arc-extinguishing chamber (94-1), and the distance between the auxiliary arc-starting plate (50-2) and the auxiliary arc-extinguishing chamber (94-2).

13. The circuit breaker according to claim 12, characterized in that: The main body of the arc-initiating component (50-0) also includes a main cap (50-00) with an inverted V-shaped structure. The plane where each arc-running plate (50-010) is located is parallel to the plane where the arc-extinguishing grid plate (490) of the main arc-extinguishing chamber (94-1) and the auxiliary arc-extinguishing chamber (94-2) is located. The two ends of the main cap (50-00) are connected to the first main body part (50-0a) and the second main body part (50-0b) of the main body of the arc-initiating component (50-00) respectively. The bend in the middle of the main cap (50-00) is the arc-initiating end.

14. The circuit breaker according to claim 12, characterized in that: The plane where each of the arc-running plates (50-010) is located is perpendicular to the plane where the arc-extinguishing grid plates (490) of the main arc-extinguishing chamber (94-1) and the auxiliary arc-extinguishing chamber (94-2) are located. The two adjacent arc-running plates (50-010) of the first main body part (50-0a) and the second main body part (50-0b) of the arc-initiating component body (50-00) are central arc-running plates. The two central arc-running plates are flush with one end near the phase pole contact system (93), protrude towards the side where the phase pole contact system (93) is located relative to the other arc-running plates (50-010), and are connected through the arc-running plate connecting part (50-011). The arc-running plate connecting part (50-011) is the central arc-running plate connecting part and is an arc-shaped plate. The midpoint of the central arc-running plate connecting part is the arc-initiating end.

15. The circuit breaker according to claim 1, characterized in that: The phase pole arc extinguishing system (94) further includes a magnetic blowout structure, which includes a first magnetic plate (57), a second magnetic plate (58), a third magnetic plate (59), a fourth magnetic plate (60), a fifth magnetic plate (61), a sixth magnetic plate (62), and a seventh magnetic plate (63). The first magnetic plate (57) and the third magnetic plate (59) are arranged opposite each other on both sides of the main arc extinguishing chamber (94-1) and located between the main arc ignition plate (51) of the arc ignition component and the phase pole contact system (93). The first magnetic plate (57), the main body of the arc ignition component (50-0), and the third magnetic plate (59) form a U-shaped structure surrounding the main arc extinguishing chamber (94-1). The second magnetic plate (58) and the fourth magnetic plate (60) The second magnetic plate (58), the main body of the arc-starting element (50-0), and the fourth magnetic plate (60) are arranged opposite each other on both sides of the secondary arc-extinguishing chamber (94-2) and located between the secondary arc-starting plate (52) of the arc-starting element and the phase pole contact system (93). The second magnetic plate (58), the main body of the arc-starting element (50-0), and the fourth magnetic plate (60) are arranged together to form a U-shaped structure surrounding the secondary arc-extinguishing chamber (94-2). The fifth magnetic plate (61) and the sixth magnetic plate (62) are arranged opposite each other on both sides of the disconnection opening (OD). The seventh magnetic plate (63) is arranged between the fifth magnetic plate (61) and the sixth magnetic plate (62) at the end near the phase pole stationary contact (111). The fifth magnetic plate (61), the sixth magnetic plate (62), and the seventh magnetic plate (63) are arranged together to form a U-shaped structure surrounding the disconnection opening (OD).

16. The circuit breaker according to claim 15, characterized in that: The phase-pole arc extinguishing system (94) further includes a first insulating plate (56-1), a second insulating plate (56-2), a third insulating plate (109), and a fourth insulating plate (110). The first insulating plate (56-1) is disposed between the first magnetic plate (57) and the main arc extinguishing chamber (94-1) and between the second magnetic plate (58) and the auxiliary arc extinguishing chamber (94-2). The second insulating plate (56-2) is disposed between the third magnetic plate (59) and the main arc extinguishing chamber (94-1) and between the fourth magnetic plate (60) and the auxiliary arc extinguishing chamber (94-2). The third insulating plate (109) and the fourth insulating plate (110) are respectively disposed on both sides of the fifth magnetic plate (61) and the sixth magnetic plate (62).

17. The circuit breaker according to claim 2, characterized in that: The operating mechanism (100) includes a bracket (1), a rocker arm assembly rotatably mounted on the bracket (1), a jump fastener (7), a locking fastener (10) that engages with the jump fastener (7), and a re-fastener (9) that engages with the locking fastener (10), a first crank (14), an energy storage spring (4), a slide rail (1-0) fixed relative to the bracket (1), a slider (18), and a first connecting rod (16); the rocker arm assembly includes a reset structure (6) for driving the jump fastener (7) and the locking fastener (10) to re-engage; the first crank (14) includes a crank limiting part (15); when the operating mechanism (100) is in the closed or disengaged state, the crank... The limiting part (15) is limited and engaged with the jump buckle (7); one end of the first crank (14) is rotatably mounted on the jump buckle (7) around the eighth center (8S), one end of the first connecting rod (16) and one end of the energy storage spring (4) are rotatably connected to the other end of the first crank (14) around the eighteenth center (18S), the other end of the first connecting rod (16) is connected to the slider (18), the other end of the energy storage spring (4) is rotatably connected to the rocker arm assembly, and the slider (18) is mounted on the guide rail (1-0) and slides back and forth along its extension direction; when the operating mechanism (100) is in the open or tripped state, the slider (18) is limited and engaged with the guide rail (1-0) to prevent the slider (18) from sliding.

18. The circuit breaker according to claim 17, characterized in that: The operating mechanism (100) further includes a second connecting rod (19), a second crank (21), a third connecting rod (23), a third crank (25), and a fourth connecting rod (29). The second crank (21) is rotatably arranged around the sixth center (6S). One end of the second connecting rod (19) is rotatably connected to the slider (18), and the other end is rotatably connected to one end of the third connecting rod (23) around the nineteenth center (19S) and to the second crank (21). The third crank (25) is rotatably arranged around the seventh center (7S). The rotation center of the third crank (25) is coincident with that of the phase pole rotating shaft mechanism. The third crank (25) is driven to rotate by the phase pole rotating shaft mechanism. The other end of the third connecting rod (23) is rotated around the twentieth center (20S) and connected to the third crank (25) to drive its rotation. The N pole rotating shaft mechanism is rotated around the twentieth center (22S). One end of the fourth connecting rod (29) is rotated around the twentieth center (21S) and connected to the second crank (21). The other end is connected to the N pole rotating shaft mechanism to drive its rotation.

19. The circuit breaker according to claim 1, characterized in that: The operating mechanism (100) further includes a first traction rod (34) and a transmission jumper (32) that are fastened together and rotated respectively; the phase disconnection unit further includes a thermomagnetic tripping mechanism (105). When an overload or short circuit fault occurs in the circuit where the phase disconnection unit is located, the thermomagnetic tripping mechanism (105) drives the first traction rod (34) to rotate and release the fastening relationship with the transmission jumper (32). The transmission jumper (32) rotates and drives the operating mechanism (100) to trip.

20. The circuit breaker according to claim 19, characterized in that: The thermomagnetic tripping mechanism (105) further includes a rotatably mounted second traction rod (72). The thermomagnetic tripping mechanisms (105) of each phase pole disconnection unit share the second traction rod (72). The second traction rod (72) is connected to the first traction rod (34) through a transmission link (113) to drive its rotation. The transmission tripping buckle (32), the first traction rod (34) and the second traction rod (72) are arranged side by side in the horizontal direction of the operating mechanism (100) on one side of the operating mechanism (100).

21. The circuit breaker according to claim 19, characterized in that: The bracket (1) includes two bracket side plates arranged opposite each other, and a transmission buckle (32) and a first traction rod (34) are arranged between the two bracket side plates.

22. The circuit breaker according to claim 19, characterized in that: When a short circuit fault occurs in the circuit where the phase pole disconnection unit (101) is located, the phase pole moving contact (41) is repelled and drives the first traction rod (34) to rotate, so that the first traction rod (34) is released from the latching engagement with the transmission jump buckle (32).

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