A modular circuit breaker, a self-checking method and a storage medium thereof

Abstract

This application relates to the field of circuit breakers, and particularly to a modular circuit breaker, a self-checking method and a storage medium thereof. It includes a housing, on which a plurality of installation slots are provided. Function modules are inserted into the installation slots. Insulation slots are provided on the inner wall of the installation slots. Insulating flexible layers are covered on both the inner wall of the insulation slots and the inner wall of the installation slots. After the function module is inserted into the installation slot, it is further inserted into the insulation slot. The insulating flexible layer is used to fit and insulate with the function module. An electrical connection component for electrically connecting with the function module is provided on the inner wall of the insulation slot. A clamping structure for clamping with the inner wall of the installation slot is provided on the function module. This application has the effect of facilitating the replacement and maintenance of the circuit breaker.

Description

Technical Field

[0001] This application relates to the field of circuit breakers, and in particular, to a modular circuit breaker, a self-checking method, and a storage medium thereof. Background Art

[0002] Circuit breakers are widely used in power transmission and distribution networks to protect circuits. However, traditional circuit breakers are mostly integrated designs, that is, the housings are mostly integrally injection-molded. At this time, when a certain functional module fails, it is often necessary to remove the entire circuit breaker for repair or replacement.

[0003] Although such integrated circuit breakers can ensure the safe and stable operation of the circuit to a certain extent, they also have problems such as high maintenance costs and long downtime, which bring great pressure to the operation of the power grid. In actual use, once a certain part is damaged, the entire device needs to be replaced, which not only consumes huge resources but also seriously affects the maintenance of normal production and living order. Summary of the Invention

[0004] In order to improve the problems of high maintenance cost and long downtime of circuit breakers, this application provides a modular circuit breaker, a self-checking method, and a storage medium thereof.

[0005] A modular circuit breaker provided by this application adopts the following technical solutions:

[0006] A modular circuit breaker includes a housing, on which a plurality of installation slots are opened. Function modules are inserted into the installation slots. Insulation slots are opened on the inner walls of the installation slots. Insulating flexible layers are covered on both the insulation slots and the inner walls of the installation slots. After the function module is inserted into the installation slot, it is further inserted into the insulation slot. The insulating flexible layer is used to fit and insulate with the function module. Electric connection components for electrically connecting with the function module are arranged on the inner walls of the insulation slots. A clamping structure for clamping with the inner wall of the installation slot is arranged on the function module.

[0007] By adopting the above technical solutions, when a certain module of the circuit breaker is damaged and a certain function is impaired, the function module can be directly replaced for repair, improving the repair efficiency, which is convenient and fast.

[0008] Optionally, inner slots and outer slots are opened on the inner walls of the insulation slots. The opening surface of the outer slot circumferentially surrounds the opening surface of the inner slot. The electric connection component includes a conductive core arranged in the inner slot and an insulating shell slidably arranged in the outer slot. The insulating shell surrounds the conductive core to achieve insulation from the outside. A conductive terminal is penetrated and embedded on the insulating shell. The conductive terminal is used to contact and electrically connect with the conductive core, and the conductive terminal is used to contact and electrically connect with the conductive end on the function module.

[0009] By adopting the above technical solution, when no functional module is inserted, the insulating shell insulates and protects the conductive core. After the functional module is inserted to the specified depth, the insulating shell electrically connects the conductive core and the functional module through the conductive terminal, which is convenient and fast and improves safety.

[0010] Optionally, the conductive core is slidably arranged in the inner groove, and a protective elastic member is arranged between the bottom wall of the inner groove and the conductive core. The protective elastic member expands and contracts along the direction of pushing the conductive core out of the inner groove. The electrical connection component includes a conducting conductive rod embedded on the inner wall of the insulating groove. The conducting conductive rod is used to make electrical contact with the conductive core. The conductive core slides along the direction of approaching or separating from the conducting conductive rod. The conducting conductive rods in adjacent installation grooves are electrically connected to achieve electrical connection between multiple functional modules.

[0011] By adopting the above technical solution, the conductive cores in different installation grooves are electrically connected through the conducting conductive rods to achieve electrical connection of adjacent circuits, so that different functional modules are connected in series to achieve series protection of overload protection, overcurrent protection, and overvoltage protection.

[0012] Optionally, at least two conductive cores are arranged in one insulating groove. The two conductive cores are respectively used for power input and power output. A plurality of trigger conductive rods are arranged on the inner wall of the insulating groove. The two ends of the trigger conductive rod are respectively in electrical contact with the conductive core and the conducting conductive rod. The adjacent trigger conductive rods in the same insulating groove are electrically connected. A disconnection groove is formed on the conductive core. The disconnection groove is used to correspond to the trigger conductive rod as the conductive core slides, so that the contact between the trigger conductive rod and the conductive core is released.

[0013] By adopting the above technical solution, it is realized that even if no functional module is inserted, the conductive cores in the same insulating groove can also conduct the circuit through the trigger conductive rod, so that the conductive core for power input and the conductive core for power output are directly connected in series, and the series circuit can also be conducted, without being unable to be connected in series because one functional module is inserted less. At the same time, it also enables the replacement of the functional module while the circuit is conducting, reducing the impact on the equipment in operation. When the functional module is inserted to the specified position, it pushes the conductive core to slide, so that the disconnection groove corresponds to the trigger conductive rod. At this time, the contact between the trigger conductive rod and the conductive core is released, so that the current of the conductive core enters the functional module, thereby connecting the functional module in series into the circuit and releasing the direct series connection between the two conductive cores.

[0014] Optionally, a linkage groove for the trigger conductive rod to slide therein is further formed on the inner wall of the insulating groove. A commutation groove is formed and communicated between the linkage groove and the outer groove. A commutation block is slidably arranged in the commutation groove. A first inclined surface is formed on the commutation block for the insulating shell to abut against so as to push the commutation block into the linkage groove. A second inclined surface is formed on the trigger conductive rod for the commutation block to abut against so as to push the trigger conductive rod out of the linkage groove and electrically connect it to the conductive core. A segmented trigger groove is formed on the insulating shell. A segmented trigger rod is slidably arranged in the segmented trigger groove. The segmented trigger rod extends into the segmented trigger groove of the adjacent insulating shell to slide, so that after the insulating shell slides a certain distance, it drives the insulating shell in the adjacent insulating groove to slide.

[0015] By adopting the above technical solution, when inserting a function module, the conductive cores in other adjacent insulating grooves are connected in series to the circuit through the segmented trigger rod, so as to realize the series conduction of the circuit without installing full-function modules. At the same time, when one of the function modules is damaged, the user can first insert a good function module and then pull out the damaged function module to realize live maintenance.

[0016] A self-checking method for a modular circuit breaker provided by the present application adopts the following technical solutions:

[0017] A self-checking method for a modular circuit breaker includes:

[0018] Obtaining the arc extinguishing chamber temperature data and time data;

[0019] Determining the temperature rise speed data and the arc extinguishing time data through the arc extinguishing chamber temperature data and the time data;

[0020] Determining and outputting an arc extinguishing chamber fault signal through the arc extinguishing time data and a preset arc extinguishing time threshold;

[0021] Determining the arc size data through the temperature rise speed data and a preset arc temperature rise conversion threshold;

[0022] Determining and outputting a contact fault signal through the arc size data and a preset open-circuit arc threshold.

[0023] By adopting the above technical solution, it is realized to automatically judge the circuit size and whether the arc extinguishing chamber and the contacts are faulty, which is convenient for the user to perform maintenance.

[0024] Optionally, it includes:

[0025] Determining the contact temperature data through the arc extinguishing chamber temperature data and a preset arc extinguishing chamber heat conduction coefficient;

[0026] Determine the contact damage data based on the contact temperature data, the preset contact protection threshold, and the arc extinction time data;

[0027] Determine the contact state data based on the arc size data and the preset normal arc threshold;

[0028] Determine the estimated contact life data based on the contact state data, the contact damage data, and the open circuit arc threshold and output it.

[0029] By adopting the above technical solution, the remaining life of the contact is automatically calculated, which is convenient and fast.

[0030] A computer-readable storage medium provided by the present application adopts the following technical solution:

[0031] A computer-readable storage medium stores a computer program that can be loaded and executed by a processor for the self-checking method of a modular circuit breaker.

[0032] By adopting the above technical solution, the computer program is stored by the computer-readable storage medium.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. Improve the maintenance efficiency, which is convenient and fast.

[0035] 2. Maintenance under live conditions, reducing the impact on the normal use of the circuit. Description of the Drawings

[0036] Figure 1 is the overall structural schematic diagram of a modular circuit breaker in an embodiment of the present application.

[0037] Figure 2 is the structural schematic diagram of hiding a functional module to highlight the insulating groove.

[0038] Figure 3 is the structural schematic diagram of highlighting the adaptation of the functional module and the insulating groove.

[0039] Figure 4 is along Figure 2 the sectional schematic diagram taken along line A-A in

[0040] Figure 5 is the structural schematic diagram after hiding the housing.

[0041] Figure 6 is Figure 5 the enlarged structural schematic diagram at B in

[0042] Figure 7 is Figure 4 the enlarged structural schematic diagram at C in

[0043] Figure 8 It is a schematic flow chart of a self-checking method for a modular circuit breaker in an embodiment of the present application.

[0044] Figure 9 It is a schematic flow chart of steps S2 - S23.

[0045] Explanation of reference numerals: 1. Housing; 11. Installation groove; 12. Functional module; 13. Insulation groove; 14. Insulating flexible layer; 15. Clamping structure; 2. Electrical connection assembly; 21. Inner groove; 212. Outer groove; 22. Conductive core; 23. Insulating shell; 24. Conductive terminal; 31. Protective elastic member; 32. Conductive rod for conduction; 33. Trigger conductive rod; 331. Trigger metal rod; 34. Disconnection groove; 4. Linkage groove; 41. Reversing groove; 42. Reversing block; 421. First inclined surface; 422. Second inclined surface; 5. Segmented trigger groove; 51. Segmented trigger rod. Detailed implementation manners

[0046] The following further elaborates on the present application in conjunction with the attached Figures 1-9 drawings.

[0047] An embodiment of the present application discloses a modular circuit breaker. Referring to Figure 1 , the modular circuit breaker includes a housing 1, the housing 1 can be made of an insulating and corrosion-resistant material, a control panel can also be integrally embedded on the housing 1, a plurality of installation grooves 11 are opened on the housing 1, functional modules 12 are inserted into the installation grooves 11, the installation grooves 11 and the functional modules 12 are in one-to-one correspondence, the functional module 12 is a modular unit of the circuit breaker function, for example, a functional module 12 with a magnetic trip mechanism for overvoltage or overcurrent protection inside it, a functional module 12 with a bimetallic strip trip mechanism for overload protection inside it, etc., and arc extinguishing chambers are also integrated in these functional modules 12 to extinguish the arcs generated when the contacts trip or close.

[0048] The control panel includes a processor and a database. The processor can include a central processing component such as a CPU or an MPU, or a host system constructed with a CPU or an MPU as the core, including hardware or software. After the meter has a processor, people can freely control the meter by programming to make it operate according to people's wishes. The processor can control local quantity transfer, remote quantity transfer, remote communication, etc. through an internal protocol. The internal protocol generally refers to all protocols for realizing mutual communication or connection within the same meter or the same system, including: part or all of the human-computer interaction protocol, soft / hardware (interface) protocol, chip bus (C-Bus) protocol, internal bus (I-Bus) protocol, etc. With the development of integrated circuit technology, some that belong to the external bus (E-Bus) protocol also belong to the internal protocol after being integrated into the chip with the external bus (E-Bus).

[0049] Reference Figure 2 With Figure 3 , an insulating groove 13 is formed on the bottom wall of the installation groove 11 facing its opening surface, and the opening surface of the insulating groove 13 is located at the center of the bottom wall of the installation groove 11. The size of the opening surface of the insulating groove 13 is smaller than that of the bottom wall of the installation groove 11. The outer shape of the functional module 12 is adapted and fitted to both the inner wall of the insulating groove 13 and the inner wall of the installation groove 11 at the same time. The extending direction of the insulating groove 13 is the same as that of the installation groove 11. The inner wall of the insulating groove 13 is covered with an insulating flexible layer 14, and the insulating flexible layer 14 also extends to cover the inner wall of the installation groove 11 around the opening surface of the insulating groove 13. The insulating flexible layer 14 is made of an insulating material with a certain flexibility, such as rubber. After the functional module 12 is inserted into the installation groove 11, it continues to be inserted into the insulating groove 13. The insulating flexible layer 14 is used to insulate in contact with the functional module 12. And as the functional module 12 is completely inserted into the insulating groove 13, the end of the functional module 12 will abut against the insulating flexible layer 14 on the inner wall of the installation groove 11 around the opening surface of the insulating groove 13, and cause the insulating flexible layer 14 here to deform and fill the space between the side wall of the functional module 12 and the inner walls of the installation groove 11 and the insulating groove 13. An electrical connection component 2 for electrically connecting with the functional module 12 is installed on the inner wall of the insulating groove 13, and a clamping structure 15 for clamping with the inner wall of the installation groove 11 is installed on the functional module 12. The clamping structure 15 can be any structure with a clamping function, such as a buckle, etc.

[0050] Reference Figure 4 , an inner groove 21 and an outer groove 212 are formed on the bottom wall of the insulating groove 13 facing its opening surface. The opening surface of the outer groove 212 circumferentially surrounds the outer circle of the opening surface of the inner groove 21. The number of inner grooves 21 formed on the bottom wall of one insulating groove 13 is two, and the outer groove 212 can be two to respectively surround the two inner grooves 21, or can be one outer groove 212 to surround the two inner grooves 21 at the same time.

[0051] Reference Figure 4 , the electrical connection component 2 includes a conductive core 22 sliding in the inner groove 21 and an insulating shell 23 sliding in the outer groove 212. The insulating shell 23 is in a hollow column shape, and the conductive core 22 is in the hollow space of the insulating shell 23. The insulating shell 23 surrounds the conductive core 22 to achieve insulation from the outside. A conductive terminal 24 is penetrated and embedded on the end of the insulating shell 23. The conductive terminal 24 is made of conductive metal. When the insulating shell 23 is pressed to the bottom, one end of the conductive terminal 24 is used to abut and electrically connect with the conductive core 22, and the other end of the conductive terminal 24 is used to contact and electrically connect with the conductive end on the functional module 12. The two conductive cores 22 in the same insulating groove 13 are respectively used for incoming electricity and outgoing electricity. The sliding directions of the conductive core 22 and the insulating shell 23 are parallel to each other.

[0052] Reference Figure 4 With Figure 5 WithFigure 6 , a protective elastic member 31 is installed between the bottom wall of the inner groove 21 and the end of the conductive core 22 in the inner groove 21. The protective elastic member 31 can be a spring. The protective elastic member 31 expands and contracts along the direction of pushing the conductive core 22 out of the inner groove 21. There are also different protective elastic members 31 installed between the bottom wall of the outer groove 212 and the insulating shell 23 to push the insulating shell 23 to slide outward in the direction outside the outer groove 212. The electrical connection assembly 2 includes a conduction conductive rod 32 embedded in the inner wall of the insulating groove 13. The conduction conductive rod 32 is embedded in the housing 1. The conduction conductive rod 32 is made of conductive metal. One end of the conduction conductive rod 32 abuts and is electrically connected to the outer side wall of the conductive core 22. The conductive core 22 slides along the direction of approaching or separating from the conduction conductive rod 32. The other end of the conduction conductive rod 32 extends into the adjacent insulating groove 13 and is in abutting electrical connection with the corresponding conductive core 22. For example, there are three insulating grooves 13 on the left, middle and right. There are two conductive cores 22 on the left and right in each insulating groove 13. The conduction conductive rod 32 on the conductive core 22 on the right side of the insulating groove 13 in the middle position extends to the left conductive core 22 in the insulating groove 13 in the right position to realize the electrical connection between multiple functional modules 12.

[0053] Refer to Figure 4 and Figure 6 and Figure 7 , a linkage groove 4 is formed on the inner wall of the inner groove 21. The extending direction of the linkage groove 4 is parallel to the sliding direction of the conductive core 22. The end of the linkage groove 4 close to the insulating groove 13 communicates with the inner groove 21 where the conductive core 22 is located. A trigger conductive rod 33 slides in the linkage groove 4. The trigger conductive rod 33 slides along the extending direction of the linkage groove 4. The end of the trigger conductive rod 33 close to the insulating groove 13 bends in the direction of entering the inner groove 21. The bent and extended end of the trigger conductive rod 33 is flush with the outer side wall of the conductive core 22. The two ends of the trigger conductive rod 33 are respectively in abutting electrical connection with the conductive core 22 and the conduction conductive rod 32.

[0054] Refer to Figure 4 and Figure 6 and Figure 7, a trigger metal rod 331 is embedded in the housing 1. The two ends of the trigger metal rod 331 respectively abut between two trigger conductive rods 33 in the same insulating groove 13 to achieve electrical connection between the two trigger conductive rods 33. A disconnection groove 34 is formed on the outer side wall of the conductive core 22. The disconnection groove 34 extends along the sliding direction of the conductive core 22 and is formed within the linear range where the bent end of the trigger conductive rod 33 is located, so that as the conductive core 22 slides, the bent end of the trigger conductive rod 33 slides from the outer side wall of the conductive core 22 to the disconnection groove 34, causing the trigger conductive rod 33 to be disengaged from the conductive core 22. A return spring is fixedly connected between the bent end of the trigger conductive rod 33 and the inner wall of the end of the linkage groove 4 close to the insulating groove 13. The return spring is telescopically pushed in a direction away from the insulating groove 13 to push the trigger conductive rod 33.

[0055] Refer to Figure 4 and Figure 7 , a commutation groove 41 is also formed and communicated between the linkage groove 4 and the outer groove 212. The commutation groove 41 is communicated with the end of the linkage groove 4 away from the insulating groove 13. A commutation block 42 slides in the commutation groove 41. The two ends of the commutation block 42 respectively slide into and out of the linkage groove 4 and the outer groove 212. A first inclined surface 421 is formed on the end of the commutation block 42 for sliding into the outer groove 212. The first inclined surface 421 is inclined in a direction closer to the insulating groove 13 as it gets closer to the linkage groove 4. The first inclined surface 421 is used for the insulating shell 23 to abut against to push the commutation block 42 into the linkage groove 4.

[0056] Refer to Figure 7 , a second inclined surface 422 is formed on the end of the trigger conductive rod 33 away from the return spring. The second inclined surface 422 is inclined in a direction closer to the insulating groove 13 as it gets closer to the outer groove 212. The second inclined surface 422 is used for the commutation block 42 to abut against to push the trigger conductive rod 33 in a direction closer to the insulating groove 13, so that the bent end of the trigger conductive rod 33 abuts and is electrically connected to the conductive core 22.

[0057] Refer to Figure 4 and Figure 6 , a segmented trigger groove 5 is formed on the outer side wall of the insulating shell 23. The segmented trigger groove 5 extends along the sliding direction of the insulating shell 23. A segmented trigger rod 51 slides in the segmented trigger groove 5. One end of the segmented trigger rod 51 slides in the segmented trigger groove 5, and the other end of the segmented trigger rod 51 extends into the segmented trigger groove 5 of the adjacent insulating shell 23 to slide, so that after the insulating shell 23 slides a certain distance, it drives the insulating shell 23 in the adjacent insulating groove 13 to slide.

[0058] The implementation principle of a modular circuit breaker in an embodiment of this application is as follows: When it is found that the tripping mechanism needs to be replaced, the corresponding functional module 12 can be taken out, and then a new functional module 12 is inserted into the installation slot 11 and fixed by buckling through the buckling structure 15. During the insertion process of the functional module 12, first, the conductive end of the functional module 12 abuts against the conductive terminal 24 of the insulating shell 23 and pushes the insulating shell 23 to slide deeply into the outer groove 212. During the sliding process, the end of the insulating shell 23 pushes the commutation block 42, and the commutation block 42 pushes the trigger conductive rod 33 to slide out and fit onto the outer side wall of the conductive core 22. At this time, the current of the conductive core 22 is connected to the conductive core 22 in the same insulating groove 13 through the trigger conductive rod 33, and then flows to the conduction conductive rod 32 and is connected to the conductive core 22 in the adjacent insulating groove 13 through the conduction conductive rod 32. This is the no-load conduction state;

[0059] As the functional module 12 continues to be inserted, the segmented trigger rod 51 slides and abuts against the inner wall of the segmented trigger groove 5 close to the insulating groove 13, and continues to push the insulating shell 23. The inner wall of the segmented trigger groove 5 will push the segmented trigger rod 51 to slide. At this time, the segmented trigger rod 51 transmits the sliding force to the insulating shell 23 in the adjacent insulating groove 13. At this time, the end of the segmented trigger rod 51 abuts against the inner wall of the segmented trigger groove 5 of the insulating shell 23 in the adjacent insulating groove 13 far from the insulating groove 13, thereby driving the movement of the insulating shell 23 in the adjacent insulating groove 13. When the functional module 12 is pushed to the end, the conductive terminal 24 abuts against the conductive core 22 and pushes the conductive core 22 to completely retract into the inner groove 21. As the conductive core 22 slides, the disconnection groove 34 slides to the lower part of the bent end of the trigger conductive rod 33, so that the trigger conductive rod 33 is disconnected from the conductive core 22. At this time, the current is connected to the conductive core 22 through the conduction conductive rod 32 and is connected to the functional module 12. At the same time, the insulating shell 23 in the adjacent insulating groove 13 also slides to push the trigger conductive rod 33 to abut against the conductive core 22, so that even if no functional module 12 is installed in the adjacent insulating groove 13, the series circuit can be conducted.

[0060] An embodiment of this application discloses a self-checking method for a modular circuit breaker. Refer to Figure 8 , a self-checking method for a modular circuit breaker includes the following steps:

[0061] S1. Obtain the arc extinguishing chamber temperature data and time data;

[0062] S11. Determine the temperature rise speed data and arc extinguishing time data through the arc extinguishing chamber temperature data and time data;

[0063] S12. Determine and output the arc extinguishing chamber fault signal through the arc extinguishing time data and the preset arc extinguishing time threshold;

[0064] S13. Determine the arc size data through the temperature rise speed data and the preset arc temperature rise conversion threshold;

[0065] S14. Determine and output the contact fault signal based on the arc size data and the preset open - circuit arc threshold value.

[0066] Details: The arc - quenching chamber temperature data is the temperature of the arc - quenching chamber detected by a temperature sensor. To avoid being affected by the arc, the temperature sensor in the arc - quenching chamber is installed at a position far from the contact. If the time data is 0.1 ms and the arc - quenching chamber temperature data is 30 °C, and when the time data is 0.2 ms, the arc - quenching chamber temperature data is 31 °C, then the temperature rise rate data can be obtained as 1 / 0.1 = 10 °C / ms. If the arc - quenching chamber temperature data stops rising when the time data is 7 ms, it means that the arc has been quenched at this time, and the time at this moment is recorded as the arc - quenching time data. Suppose the arc - quenching time threshold is 5 ms, which means that under normal circumstances, the arc - quenching time should be within 5 ms. At this time, 7 ms exceeds the range of 5 ms, indicating that there is a fault in the arc - quenching chamber, such as a magnetic field generation fault or a structural damage, etc. The arc - quenching chamber fault signal is output to the user to remind for replacement and repair. And the arc size can be judged through the temperature rise rate data. The larger the arc, the more heat is released and the faster the temperature rises. This is also related to the heat conduction coefficient in the arc - quenching chamber. The relationship between the arc size and the temperature rise rate is the arc temperature rise conversion threshold, thus obtaining the arc size data. The open - circuit arc threshold value represents the arc size generated when the contact is normally switched on and off. If the arc size data exceeds the range of the open - circuit arc threshold value, it means that the arc is too large, which may be caused by contact faults at this time, such as contact melting, resulting in changes in the cross - sectional area of the contact and the surface roughness, affecting the resistance value, etc. The corresponding contact fault signal is output to the user to remind the user for repair and replacement.

[0067] Refer to Figure 9 , and further includes the following steps:

[0068] S2. Determine the contact temperature data based on the arc - quenching chamber temperature data and the preset arc - quenching chamber thermal conductivity.

[0069] S21. Determine the contact damage data based on the contact temperature data, the preset contact protection threshold value, and the arc - quenching time data.

[0070] S22. Determine the contact state data based on the arc size data and the preset normal arc threshold value.

[0071] S23. Determine and output the estimated contact life data based on the contact state data, the contact damage data, and the open - circuit arc threshold value.

[0072] Details: The thermal conductivity of the arc extinguishing chamber is a relationship between the temperature in the arc extinguishing chamber and the temperature of the contact, that is, it represents how much heat the arc releases to the arc extinguishing chamber. Correspondingly, at this time, how much heat the contact receives from the arc. Thus, based on the detected temperature data of the arc extinguishing chamber, the contact temperature data within a rough range can be calculated; the contact protection threshold is the damage rate of the contact at high temperatures. For example, if the contact protection threshold is set as (a°, b), it means that at a temperature of a°, the contact will receive b damages, and the unit of b is damage / time. Thus, the contact damage data can be calculated based on the contact temperature data, and the contact state data represents the state of the contact under the current situation according to the state of the released arc, excluding abnormal situations such as normal surface of the contact but excessive internal damage, or low degree of internal damage of the contact but severe surface damage. Thus, it can be estimated how long the contact can still be used, that is, the estimated contact life data.

[0073] Embodiments of the present application disclose a computer-readable storage medium. Referring to Figure 1 , the computer-readable storage medium stores a computer program that can be loaded and executed by a processor to perform the self-checking method of a modular circuit breaker.

[0074] The computer-readable storage medium includes, for example: various media such as USB flash drives, external hard drives, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0075] The above are all preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A modular circuit breaker, characterized in that: The invention comprises a shell (1), wherein a plurality of mounting grooves (11) are provided on the shell (1), a functional module (12) is inserted into the mounting groove (11), an insulating groove (13) is provided on the inner wall of the mounting groove (11), the insulating groove (13) and the inner wall of the mounting groove (11) are both covered with an insulating flexible layer (14), the functional module (12) is inserted into the mounting groove (11) and then continues to be inserted into the insulating groove (13), the insulating flexible layer (14) is used to be insulated from the functional module (12), an electrical connection component (2) for electrically connecting to the functional module (12) is provided on the inner wall of the insulating groove (13), and the functional module (12) is provided with a clamping structure (15) for clamping to the inner wall of the mounting groove (11); An inner groove (21) and an outer groove (212) are provided on the inner wall of the insulating groove (13); an opening surface of the outer groove (212) circumferentially surrounds the outer ring of the opening surface of the inner groove (21); the electrical connection component (2) comprises a conductive core (22) arranged in the inner groove (21) and an insulating shell (23) slidably arranged in the outer groove (212); the insulating shell (23) surrounds the conductive core (22) to achieve insulation from the outside; a conductive terminal (24) is embedded through the insulating shell (23); the conductive terminal (24) is used to contact and electrically connect with the conductive core (22); and the conductive terminal (24) is used to contact and electrically connect with a conductive end on the functional module (12); The conductive core (22) is slidably arranged in the inner groove (21); a protective elastic member (31) is arranged between the bottom wall of the inner groove (21) and the conductive core (22); the protective elastic member (31) is retracted in a direction of pushing the conductive core (22) out of the inner groove (21); the electrical connection assembly (2) comprises a conductive rod (32) embedded in the inner wall of the insulating groove (13); the conductive rod (32) is used to contact and electrically connect with the conductive core (22); the conductive core (22) slides in a direction of approaching to contact or moving away from the conductive rod (32); the conductive rod (32) is electrically connected to the conductive rod (32) in an adjacent mounting groove (11) to achieve electrical connection between a plurality of functional modules (12).

2. A modular circuit breaker according to claim 1, characterized in that: At least two conductive cores (22) are arranged in one insulating slot (13), and the two conductive cores (22) are used for inputting electricity and outputting electricity respectively. A plurality of trigger conductive rods (33) are arranged on the inner wall of the insulating slot (13), and two ends of the trigger conductive rods (33) are respectively abutted and electrically connected to the conductive core (22) and the conduction conductive rods (32). Adjacent trigger conductive rods (33) in the same insulating slot (13) are electrically connected. A disconnecting slot (34) is provided on the conductive core (22), and the disconnecting slot (34) is used to correspond to the trigger conductive rods (33) as the conductive core (22) slides, so that the trigger conductive rods (33) and the conductive core (22) are disconnected.

3. A modular circuit breaker according to claim 2, characterized in that: The inner wall of the insulating groove (13) is provided with a linkage groove (4) for the triggering conductive rod (33) to slide inside. A commutation groove (41) is provided between the linkage groove (4) and the outer groove (212). A commutation block (42) is slidably arranged in the commutation groove (41). The commutation block (42) is provided with a first inclined surface (421). The first inclined surface (421) is used for the insulating shell (23) to abut against so as to push the commutation block (42) into the linkage groove (4). The triggering conductive rod (33) is provided with a second inclined surface (422). The second inclined surface (422) is used for the commutation block (42) to abut against, so as to push the trigger conductive rod (33) out of the linkage slot (4) and electrically connect it to the conductive core (22); the insulating shell (23) is provided with a segmented trigger slot (5), in which a segmented trigger rod (51) is slidably arranged, and the segmented trigger rod (51) extends to slide in the segmented trigger slot (5) of the adjacent insulating shell (23), so that the insulating shell (23) slides a certain distance and then drives the insulating shell (23) in the adjacent insulating slot (13) to slide.

4. A self-test method for a modular circuit breaker, using the modular circuit breaker according to claim 3, characterized in that: include: Obtain arc extinguishing chamber temperature data and time data; Determine temperature rise rate data and arc extinguishing time data through the arc extinguishing chamber temperature data and the time data; Determine and output an arc extinguishing chamber fault signal based on the arc extinguishing time data and a preset arc extinguishing time threshold; Determine the arc size data by using the temperature rise rate data and a preset arc temperature rise conversion threshold; The contact fault signal is determined and outputted by the arc size data and a preset circuit breaking arc threshold.

5. A modular circuit breaker self-test method according to claim 4, characterized in that: include: Determining contact temperature data by using the arc extinguishing chamber temperature data and a preset arc extinguishing chamber thermal conductivity; Determining contact damage data through the contact temperature data, a preset contact protection threshold and the arc extinguishing time data; Determining contact state data by using the arc size data and a preset normal arc threshold value; The estimated contact life data is determined and outputted through the contact state data, the contact damage data and the circuit breaking arc threshold.

6. A computer-readable storage medium, characterized in that: The computer program is stored and can be loaded by a processor to execute the self-test method of a modular circuit breaker according to any one of claims 4 to 5.

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