High-voltage circuit breaking device integrated with active and passive protection

Abstract

The invention provides a high-voltage circuit breaking device integrated with active and passive protection. An excitation power-off switch comprises a first conductive plate, an excitation device and a power device, a first weak part is formed at the joint between the first conductive part and the second conductive part of the first conductive plate, a second weak part is formed at the joint between the second conductive part and the third conductive part, the third conductive part is connected in series with the rapid fuse, and the part, close to the first weak part, of the second conductive part is provided with an arc isolation module and a rotating shaft; an excitation device and a power device are arranged in the upper shell; the lower end of the power device is downwards aligned with an area, close to the second weak part, of the second conductive part; the arc extinguishing fuse and the second conductive part are connected in parallel. The arc extinguishing fuses connected in parallel and the high-speed fuses connected in series are arranged, the structure is compact, the voltage endurance capability and the breaking range, the arc extinguishing capability and the breaking reliability in a high-voltage electrical environment are improved through the double-fracture design, and circuit safety is guaranteed.

Description

Technical Field

[0001] The invention relates to the fields of power control, protection and electric vehicles, and in particular to a high-voltage circuit breaker device integrating active and passive protection. Background Art

[0002] With the rapid development of the new energy vehicle field, high-voltage circuit breakers, as part of circuit protection, play a vital role in ensuring the circuit safety of automobiles. However, the high-voltage circuit breakers currently on the market often have certain limitations when dealing with complex and changeable circuit failures. One is the traditional thermal fuse that uses the internal metal fuse to break and cut off the circuit when heated. It has a simple structure, but has a long reaction time, high power consumption, and uncontrolled fusing action, which cannot fully meet the complex vehicle conditions of new energy vehicles.

[0003] One is the excitation fuse that has appeared in recent years and uses mechanical action to quickly disconnect. Its structure is more complicated than that of the thermal fuse. The principle is that it receives a trigger signal to drive the gas generating device to work, generate a large amount of expanding gas, and push its power device to quickly cut off the conductor in series with the main circuit to achieve circuit protection. Compared with the thermal fuse, it has the advantages of fast action time and controllable disconnection, but its defects are also obvious: when the high-voltage circuit is disconnected, the arc at the air break will increase significantly under the low-voltage electrical environment, resulting in a sharp increase in the difficulty of arc extinguishing. Limited by structure and space, the excitation fuses on the market are generally single-break designs with limited voltage resistance, which are not suitable for high-voltage electrical environments of 800V and above. In addition, if an abnormal fault occurs at the signal input end and the excitation device cannot be driven to operate, the fault current still passes through the device into the main circuit to cause impact damage to the electronic components, thereby failing to achieve the purpose of protecting the circuit safety.

[0004] Alternatively, there are some combined electronic components on the market, such as relays plus heating fuses, contactors plus excitation fuses, etc., which can realize active and passive protection at the same time, but their shortcomings are very obvious. The current combined devices are large in size, occupy a lot of space, and are not conducive to installation; some combined components of relays have a fault current range that neither relays nor fuse protection can effectively protect in time, that is, it exceeds the maximum breaking capacity of the relay but does not meet the minimum breaking requirement of the fuse, so that the device needs a long time to respond within this range, which may damage circuit components such as relays and cause high-temperature fires; some combined components of contactors have stress-bearing parts that are prone to aging and have a relatively short service life. Summary of the invention

[0005] Based on the above problems, the present invention provides a high-voltage circuit breaker device integrating active and passive protection, aiming to solve the problems of breaking range, arc extinguishing capability, product volume, etc. existing in the prior art.

[0006] A high-voltage circuit breaker device with integrated active and passive protection includes an upper shell, a lower shell and a side shell, an excitation power-off switch, an arc-extinguishing fuse and a fast fuse; a fast fuse is arranged in the side shell, and an arc-extinguishing fuse is arranged at the bottom of the lower shell;

[0007] The excitation power-off switch comprises a first conductive plate, an excitation device and a power device;

[0008] The first conductive plate comprises a first conductive part, a second conductive part and a third conductive part which are connected in sequence, the first end of the first conductive part is connected to the main circuit, the connection between the second end of the first conductive part and the first end of the second conductive part forms a first weak point, the connection between the second end of the second conductive part and the first end of the third conductive part forms a second weak point, the second end of the third conductive part is connected in series with the fast fuse, and the part of the second conductive part close to the first weak point is provided with an arc isolation module and a rotating shaft;

[0009] An excitation device and a power device are arranged in the upper shell, the excitation device is above the power device, and the lower end of the power device is downwardly aligned with the area of ​​the second conductive part close to the second weak point;

[0010] Furthermore, a first vertical cavity is provided in the upper shell, and the excitation device and the power device are installed in the first vertical cavity;

[0011] Furthermore, a cavity wall of the first vertical cavity is provided with a limiting steel ring, and the limiting steel ring is located between the excitation device and the power device.

[0012] The lower shell has a first arc-shaped cavity, and a limiting groove is provided on the cavity wall of the first arc-shaped cavity, and the limiting groove is vertically opposite to the lower end of the power device;

[0013] Furthermore, the upper shell has a second arc-shaped cavity, and the lower shell also has a third arc-shaped cavity, and the second arc-shaped cavity and the third arc-shaped cavity are connected to form a semicircular cavity; the first end of the second conductive part and the first weak point are in the semicircular cavity;

[0014] The middle part of the rotating shaft passes through the arc isolation module or the second conductive part, and both ends of the rotating shaft are supported by the upper shell or the lower shell;

[0015] After receiving the trigger signal, the excitation device generates expansion gas, which pushes the power device downward. Under the pushing action, the power device moves downward to break through the second weak point, and the moving range of the lower end of the power device is limited by the limiting groove.

[0016] After the power device moves downward under the pushing action to break the second weak point, the second conductive part rotates around the rotation axis to cause the second weak point to be disconnected, and the arc isolation module fills the semicircular cavity to isolate the space between the second end of the first conductive part and the second break.

[0017] Furthermore, the arc isolation module is a cylinder, a semi-cylinder or any shape that can satisfy the barrier function.

[0018] The arc-extinguishing fuse is connected in parallel with the outer sides of the weak points at both ends of the second conductive part.

[0019] Furthermore, a placement cavity is provided at the bottom of the lower shell, and the arc-extinguishing fuse is located in the placement cavity.

[0020] Furthermore, the first end of the arc-extinguishing fuse is electrically connected to the second end of the first conductive part through the conductive sheet, and the second end of the arc-extinguishing fuse is electrically connected to the first end of the third conductive part through the conductive sheet, so as to realize parallel connection between the arc-extinguishing fuse and the outer side of the weak points at both ends of the second conductive part;

[0021] The resistivity of the conductive sheet and the arc-extinguishing fuse is much greater than the resistivity of the first conductive plate.

[0022] Furthermore, the side housing has a second vertical cavity, and a fast fuse is arranged in the second vertical cavity;

[0023] The second end of the third conductive part extends into the second vertical cavity and is fixedly connected to the first end of the fast fuse, the second end of the fast fuse is connected to the first end of the second conductive plate, and the second end of the second conductive plate extends out of the side housing and is connected to the main circuit.

[0024] The beneficial technical effect of the present invention is that the present invention sets an excitation disconnect switch on the upper shell, sets an arc extinguishing fuse in parallel on the lower shell, and sets a fast fuse in series on the side shell, which has a compact structure, occupies a small space, and has a double-break design, which improves the withstand voltage, improves the breaking range, arc extinguishing ability and breaking reliability under high-voltage electrical environment, and further ensures circuit safety. Its structure is relatively simple, not easily disturbed by various complex external factors, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front cross-sectional view of a high-voltage circuit breaker device with integrated active and passive protection according to the present invention;

[0026] Figure 2 It is a top view cross-sectional view of a high-voltage circuit breaker device with integrated active and passive protection according to the present invention;

[0027] Figure 3 It is a side sectional view of a high-voltage circuit breaker device with integrated active and passive protection according to the present invention.

[0028] in:

[0029] 100-excitation power-off switch; 101-upper shell; 102-lower shell; 103-first conductive part; 104-second conductive part; 105-third conductive part; 106-power device; 107-excitation device; 108-limiting steel ring; 109-arc isolation module; 110-rotating shaft; 111-conductive sheet; 112-limiting groove; 113-first weak point; 114-second weak point; 200-arc extinguishing fuse; 201-bottom shell; 300-fast fuse; 301-side shell; 302-second conductive plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0033] See also Figure 1-3 The present invention provides a high-voltage circuit breaker device with integrated active and passive protection, comprising an upper housing (101), a lower housing (102) and a side housing (301), an excitation power-off switch (100), an arc-extinguishing fuse (200) and a fast fuse (300); the side housing (301) is provided with a fast fuse (300), and the bottom of the lower housing (102) is provided with an arc-extinguishing fuse (200);

[0034] The materials of the upper shell, the lower shell and the side shell can be ceramics or thermosetting plastics such as melamine.

[0035] The excitation power-off switch (100) comprises a first conductive plate, an excitation device (107) and a power device (106);

[0036] The first conductive plate comprises a first conductive part (103), a second conductive part (104) and a third conductive part (105) connected in sequence, the first end of the first conductive part (103) is connected to the main circuit, the connection between the second end of the first conductive part (103) and the first end of the second conductive part (104) forms a first weak point (113), the connection between the second end of the second conductive part (104) and the first end of the third conductive part (105) forms a second weak point (114), the second end of the third conductive part (105) is connected in series with the fast fuse (300), and the part of the second conductive part (104) close to the first weak point (113) is provided with an arc isolation module (109) and a rotating shaft (110);

[0037] An excitation device (107) and a power device (106) are arranged in the upper housing (101), the excitation device (107) is above the power device (106), and the lower end of the power device (106) is downwardly aligned with an area of ​​the second conductive portion (104) close to the second weak point (114);

[0038] Specifically, the excitation device (107) is a micro gas generator.

[0039] The micro gas generator can receive an external trigger signal to ignite and cause the internal gunpowder to explode, thereby generating a large amount of high-temperature expansion gas as a driving force for the driving power device (106).

[0040] The power device (106) is a movable cylindrical insulating punch, which can cut off the first conductive plate under the driving force of high-pressure gas. The power device (106) is in airtight contact with the first vertical cavity in the upper shell, ensuring that the gas driving force generated by the excitation device (107) is all concentrated on the power device (106) without loss of force. The side of the punch close to the second conductive part (104) of the first conductive plate maintains a certain distance from the second conductive part, ensuring that it has a certain impact force.

[0041] Furthermore, the first conductive plate and the upper shell, the lower shell and the side shell, the second conductive plate and the side shell, the power device and the first vertical cavity, and the arc isolation module and the semicircular cavity are in sealed contact.

[0042] The first conductive plate is provided with two weak points, namely a first weak point (113) and a second weak point (114). When the power device (106) breaks through the second weak point (114), a first fracture is generated, and the second conductive part rotates around the rotation axis. Due to the influence of the rotational tension, the first weak point (113) is pulled apart to generate a second fracture. The rotation causes the second end of the second conductive part to continue to move downward, and the first end of the second conductive part to continue to move upward. As a result, a physical isolation is formed between the arc isolation module at the first end of the second conductive part and the second fracture, thereby achieving effective arc extinguishing.

[0043] The first conductive plate may be composed of one or more metals, or may be composed of one or more metal and non-metal composite materials. The first conductive portion, the second conductive portion, and the third conductive portion of the first conductive plate may be considered to be made of the same material through mechanical processing to obtain the first weak point and the second weak point, or may be considered to be formed by connecting multiple independent materials through a process.

[0044] The second conductive plate can be considered as being made of the same integrated material as the first conductive plate, or can be considered as being formed by connecting multiple independent materials through a process.

[0045] Furthermore, a first vertical cavity is provided in the upper shell (101), and the excitation device (107) and the power device (106) are installed in the first vertical cavity;

[0046] The excitation device (107) is arranged in the first vertical cavity, and is located above the power device (106). The excitation device receives a trigger signal from the outside of the excitation power-off switch and starts to operate, releasing high-pressure gas at an extremely fast speed, generating a large amount of expansion gas instantly, and pushing the power device in a predetermined direction ( Figure 1 The power device (106) moves downward (in the middle), pushing the power device downward to impact the second conductive part (104) so ​​as to break the second weak point (114), and the movement range of the lower end of the power device (106) is limited by the limiting groove (112).

[0047] Furthermore, the lower end surface of the power device (106) can be configured into a special structure such as a pointed cone or other protrusions to concentrate the force at the second weak point so as to cut off the second weak point.

[0048] Furthermore, a limiting steel ring (108) is provided on the cavity wall of the first vertical cavity. The limiting steel ring (108) is located between the excitation device (107) and the power device (106), and mainly plays the role of limiting support and mitigating the impact force of the explosion.

[0049] Furthermore, the upper shell (101) has a second arc-shaped cavity, and the lower shell (102) also has a third arc-shaped cavity, and the second arc-shaped cavity and the third arc-shaped cavity are connected to form a semicircular cavity; the first end of the second conductive part (104) and the first weak point (113) are in the semicircular cavity;

[0050] The middle of the rotating shaft (110) passes through the arc isolation module (109) or the second conductive part (104), and the two ends of the rotating shaft (110) are supported by the upper shell (101) or the lower shell (102); the second conductive part (104) forms a lever-like structure under the support of the rotating shaft (110), and when one end receives the impact of the power device (106), according to power×power arm=resistance×resistance arm, the force transmitted to the other end causes the first weak point to be disconnected. Specifically, the rotating shaft (110) is made of insulating material.

[0051] After the power device (106) moves downward under the pushing action to break the second weak point (114), the second conductive part (104) rotates around the rotation axis (110) to cause the second weak point (114) to be disconnected, and the arc isolation module (109) is filled into the semicircular cavity to isolate the second end of the first conductive part (103).

[0052] The arc isolation module (109) is arranged in the lower shell cavity, attached to the second conductive part of the first conductive plate, and is made of insulating material resistant to high temperature and electrical breakdown. It can be a semi-cylinder, a cylinder, or any shape that can meet the barrier function.

[0053] The arc-extinguishing fuse (200) is of closed design and filled with an arc-extinguishing medium, and is located in a storage cavity at the bottom of the lower housing (102). Specifically, the arc-extinguishing fuse (200) comprises a fuse, a housing, a contact blade, a cover plate, and quartz sand. The fuse is made of a metal material with excellent electrical conductivity, and is arranged as at least one narrow structure with a weak diameter.

[0054] The arc-extinguishing fuse (200) is connected in parallel with the second conductive part (104) of the excitation power-off switch through a conductive medium, and the conductive medium can be a separate part or a part of a conductive plate extending in a specified direction and connected in parallel with the arc-extinguishing fuse (200). That is, two separate conductive sheets (111) are arranged between the conductive plate and the arc-extinguishing switch (200), one end of one conductive sheet (111) is connected to the second end of the first conductive part (103), and the other end of the conductive part is connected to one end of the arc-extinguishing fuse (200), and one end of the other conductive sheet is connected to the first end of the third conductive part (105), and the other end is connected to the other end of the arc-extinguishing fuse (200), so as to realize the parallel connection of the arc-extinguishing fuse (200) and the outer side of the weak points at both ends of the second conductive part (104).

[0055] The conductive sheet (111) is made of pure metal or alloy conductive material, and its resistivity is much greater than that of the first conductive plate. One end is connected to two weak points of the first conductive plate by welding, and the other end is connected to the end of the arc-extinguishing fuse (200) by welding or bolt connection, so that the arc-extinguishing fuse (200) is connected in parallel to the main circuit.

[0056] The side housing (301) has a second vertical cavity, in which a fast fuse (300) is arranged;

[0057] The fast fuse (300) is of a closed design and is filled with an arc extinguishing medium. Specifically, the fast fuse (300) comprises a fuse, a housing, a contact blade, a cover plate and quartz sand. The fuse is made of a metal material with excellent electrical conductivity and is provided with at least one narrow structure with a weak diameter. Under normal flow conditions, current flows through the fuse without causing it to melt due to heat; when subjected to a large fault current shock, the fuse heats up and begins to melt rapidly from the narrow diameter, and the melting point is filled with quartz sand to absorb heat and extinguish the arc.

[0058] The resistivity of the fast fuse (300) is the same as the resistivity of the first conductive plate and the second conductive plate.

[0059] The fast fuse is connected in series with the excitation disconnect switch via a conductive medium. The conductive medium may be a separate part, or the first conductive plate of the excitation disconnect switch may extend outwardly from the externally exposed portion and be directly connected in series with the fast fuse, i.e., the second end of the third conductive portion (105) extends into the side housing (301) and is directly connected to the fast fuse (300). The second end of the fast fuse (300) is connected to the first end of the second conductive plate (302), and the second end of the second conductive plate (302) extends out of the side housing (301) and is connected to the main circuit.

[0060] The difference between a fast fuse and an arc-extinguishing fuse is that when the main circuit is flowing normally, the current passes through the fast fuse but not the arc-extinguishing fuse; when impacted by a fault current, the fast fuse has a very fast breaking time, while the arc-extinguishing fuse is controlled to break when the arc fills the enclosed space after the first conductive plate is cut off. As an implementation method, the fast fuse is an independent part, and the arc-extinguishing fuse can be an independent part, or at least two parts are connected in series or in parallel to form a whole.

[0061] The fast fuse is connected to the excitation power-off switch in a series conductive manner to realize the passive protection circuit function; the excitation power-off switch accepts external trigger signal input to work to realize the active protection circuit function; the arc-extinguishing fuse is connected to the excitation power-off switch in a parallel conductive manner to assist in extinguishing the arc of the excitation power-off switch.

[0062] The present invention sets an excitation disconnect switch in the upper housing, sets an arc extinguishing fuse in parallel in the lower housing, and sets a fast fuse in series in the side housing. The structure is compact, the space occupied is small, the double-break design improves the withstand voltage, improves the breaking range, arc extinguishing ability and breaking reliability in the high-voltage electrical environment, and further ensures the circuit safety. The structure is relatively simple, not easily disturbed by various complex external factors, and the service life is very long.

[0063] The working principle of a high-voltage circuit breaker device with integrated active and passive protection of the present invention is as follows:

[0064] Under normal working conditions, the main circuit current flows through the first conductive plate of the excitation power-off switch (100) and the series-connected fast fuse (300), and the entire circuit breaker device does not operate.

[0065] When a small fault current is generated in the main circuit, the excitation device (107) of the excitation power-off switch (100) receives an external trigger signal and operates rapidly, igniting to generate a large amount of high-temperature expanding gas, pushing the power device (106) to move rapidly toward the first conductive plate (104), impacting the second weak point (114) of the first conductive plate, thereby cutting off the first conductive plate and generating a first fracture.

[0066] The power device (106) slows down and continues to move until it stops at the limiting groove (112) of the lower shell, thereby forming a physical isolation between the first fracture. After the second weak point (114) is cut off, the second conductive part (104) of the first conductive plate continues to rotate around the insulating rotating shaft (110), and the first weak point (113) is disconnected by the rotational pulling force, resulting in a second fracture. The second conductive part (104) and the arc isolation module (109) attached thereto continue to move until the second conductive part stops moving up and down due to the cavity wall blocking the cavity wall, and the arc isolation module (109) fills the semicircular cavity, forming a physical isolation between the second fracture. Most of the fault current flows through the arc extinguishing fuse (200) from the conductive sheet (111) after the second break. Since the fault current is small and insufficient to heat and melt the internal fuse of the arc extinguishing fuse, in this case, the arc extinguishing fuse only plays a current limiting role. Since the voltage across the first conductive plate remains unchanged, the total resistance increases when the arc extinguishing fuse is connected to the main circuit, so the fault current becomes smaller, and the arc generated at the two breaks is smaller. The physical isolation between the power device (106) and the arc isolation module (109) and each break can extinguish the arc.

[0067] When a large fault current is generated in the main circuit, the excitation device (107) of the excitation power-off switch receives an external trigger signal and operates rapidly, ignites and generates a large amount of high-temperature expansion gas, and pushes the power device (106) to move rapidly toward the first conductive plate, impacting the second weak point of the first conductive plate, thereby cutting off the first conductive plate and generating a first fracture. After the second weak point is cut off, the first conductive plate continues to rotate around the insulating rotation axis (110), and at the same time, the first weak point is cut off by the rotational pulling force, generating a second fracture. Most of the fault current flows through the arc-extinguishing fuse from the conductive sheet (111) after the second fracture is generated. Due to the large fault current, the internal melt of the arc-extinguishing fuse is impacted and starts to melt from the narrow diameter due to heat, and the generated arc is extinguished by the quartz sand filled in the arc-extinguishing fuse. The arc generated at the fracture is very small, and the physical isolation between the power device and the arc-isolating module and the fracture can extinguish the arc.

[0068] When a fault current is generated in the main circuit, but a fault occurs at a signal source outside the circuit breaker device and the drive signal cannot be transmitted to activate the excitation device (107), the second conductive portion (104) of the first conductive plate cannot be cut off, and the fault current flows from the main circuit through the first conductive plate into the fast fuse (300). After the internal fuse is impacted, it starts to melt from the narrow diameter due to heat, and the generated arc is extinguished by the quartz sand filled in the fast fuse, thereby achieving the purpose of safely cutting off the circuit.

[0069] Compared with some existing power-off schemes, the high-voltage circuit breaker device of the present invention integrates active and passive protection. The device has both active protection and passive protection functions, a wider protection range, a faster action time, and safer and more reliable disconnection. The volume is smaller than that of separate combination devices, the structure is simpler, some parts can be flexibly disassembled and replaced, and the service life is longer.

[0070] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A high voltage circuit breaker device with integrated active and passive protection, characterized in that: It includes an upper shell, a lower shell and a side shell, an excitation power-off switch, an arc-extinguishing fuse and a fast fuse; the fast fuse is arranged in the side shell, and the arc-extinguishing fuse is arranged at the bottom of the lower shell; The excitation power-off switch comprises a first conductive plate, an excitation device and a power device; The first conductive plate comprises a first conductive part, a second conductive part and a third conductive part connected in sequence, the first end of the first conductive part is connected to the main circuit, the connection between the second end of the first conductive part and the first end of the second conductive part forms a first weak point, the connection between the second end of the second conductive part and the first end of the third conductive part forms a second weak point, the second end of the third conductive part is connected in series with the fast fuse, and the part of the second conductive part close to the first weak point is provided with an arc isolation module and a rotating shaft; The excitation device and the power device are arranged in the upper shell, the excitation device is above the power device, and the lower end of the power device is downwardly aligned with the area of ​​the second conductive part close to the second weak point; The arc-extinguishing fuse is connected in parallel to the outer sides of the weak points at both ends of the second conductive part.

2. A high-voltage circuit breaker device with integrated active and passive protection as claimed in claim 1, characterized in that: A first vertical cavity is provided in the upper shell, and the excitation device and the power device are installed in the first vertical cavity.

3. A high-voltage circuit breaker device with integrated active and passive protection as claimed in claim 2, characterized in that: The cavity wall of the first vertical cavity is provided with a limiting steel ring, and the limiting steel ring is located between the excitation device and the power device.

4. A high-voltage circuit breaker device with integrated active and passive protection as claimed in claim 2, characterized in that: The lower shell has a first arc-shaped cavity, and a limiting groove is provided on the cavity wall of the first arc-shaped cavity, and the limiting groove is vertically opposite to the lower end of the power device; After receiving the trigger signal, the excitation device generates expansion gas to push the power device downward. Under the pushing action, the power device moves downward to break through the second weak point, and the moving range of the lower end of the power device is limited by the limiting groove.

5. A high-voltage circuit breaker device with integrated active and passive protection as claimed in claim 4, characterized in that: The upper shell has a second arc-shaped cavity, and the lower shell also has a third arc-shaped cavity, the second arc-shaped cavity and the third arc-shaped cavity are connected to form a semicircular cavity; the first end of the second conductive part and the first weak point are in the semicircular cavity; The middle part of the rotating shaft passes through the arc isolation module or the second conductive part, and both ends of the rotating shaft are supported by the upper shell or the lower shell; After the power device moves downward under the pushing action to break the second weak point, the second conductive part rotates around the rotating axis to cause the second weak point to be disconnected, and the arc isolation module is filled into the semicircular cavity to isolate the second end of the first conductive part.

6. A high-voltage circuit breaker device with integrated active and passive protection as claimed in claim 2, characterized in that: The first end of the arc-extinguishing fuse is electrically connected to the second end of the first conductive part through the conductive sheet, and the second end of the arc-extinguishing fuse is electrically connected to the first end of the third conductive part through the conductive sheet, so as to realize parallel connection between the arc-extinguishing fuse and the outer sides of the weak points at both ends of the second conductive part; The resistivity of the conductive sheet and the arc-extinguishing fuse is much greater than the resistivity of the first conductive plate.

7. A high-voltage circuit breaker device with integrated active and passive protection as claimed in claim 2, characterized in that: The side housing has a second vertical cavity, in which the fast fuse is arranged; The second end of the third conductive part extends into the second vertical cavity and is fixedly connected to the first end of the fast fuse, the second end of the fast fuse is connected to the first end of the second conductive plate, and the second end of the second conductive plate extends out of the side housing and is connected to the main circuit.

8. A high-voltage circuit breaker device with integrated active and passive protection as claimed in claim 2, characterized in that: A placement cavity is provided at the bottom of the lower shell, and the arc-extinguishing fuse is located in the placement cavity.

9. A high-voltage circuit breaker device with integrated active and passive protection as claimed in claim 1, characterized in that: The arc isolation module is a cylinder or a semi-cylinder.

10. A high-voltage circuit breaker device with integrated active and passive protection according to claim 1, characterized in that: The excitation device is a micro gas generator.

Images