Segmented adjustment and detection method based on low-voltage intelligent switch

Abstract

The invention provides a segmented adjustment and detection method based on a low-voltage intelligent switch, and belongs to the technical field of low-voltage power distribution equipment.The segmented adjustment and detection method comprises a rack, a clamping assembly is fixedly connected to the left side of an inner cavity of the rack, and a residual current operated circuit breaker is clamped in an inner cavity of the clamping assembly; an electric push rod is fixedly connected to the position, located on one side of the residual current operated circuit breaker, of the top of the rack, a front-back adjusting assembly is fixedly connected to the top of the electric push rod, and fine adjustment assemblies are fixedly connected to the two ends of the front-back adjusting assembly; the front end of the other side of the top of the rack is fixedly connected with a short-circuit test generator, an ampere meter and a voltmeter. According to the invention, precise segmented adjustment of functions of residual current protection, overload protection, short circuit protection and the like can be realized, and through segmented adjustment, the residual current operated circuit breaker can accurately respond to a fault in a circuit, and the safety of equipment and personnel is protected to the greatest extent.

Description

Technical Field

[0001] The present invention belongs to the technical field of low-voltage power distribution equipment, and particularly relates to a sectional calibration and detection method based on a low-voltage intelligent switch. Background Technique

[0002] The low-voltage switch is an electrical component that plays a role in controlling and protecting the circuit, and its application range is wide, involving multiple industries such as automobiles, electricity, and water purification.

[0003] The low-voltage switch is generally applied to switchgear with a rated voltage below 1000V. According to its functions and different application scenarios, it can be mainly divided into the following categories:

[0004] Automobile low-voltage protection switch: When the voltage provided by the automobile battery is lower than a preset value, the switch will automatically turn off the on-vehicle power supply. The purpose of this is to protect the battery from over-discharging, and at the same time give priority to ensuring the normal power consumption of the automobile itself, such as ensuring that the automobile can start normally.

[0005] Pressure control low-voltage switch: It is mainly applied to systems such as water pumps and air conditioners. When the water pressure or air pressure in the system is too low, it will cut off the circuit, thereby protecting the equipment and preventing the equipment from being damaged due to idling.

[0006] Low-voltage switch for power equipment: Such as circuit breakers, disconnect switches, load switches, etc. all belong to this category. They are responsible for switching on and off the circuit in the power system, and when faults such as overload and short circuit occur in the circuit, they can quickly cut off the circuit to play a protective role.

[0007] The working principles of different types of low-voltage switches are also different. Taking the common air switch (low-voltage circuit breaker) as an example, it mainly relies on a bimetallic strip and an electromagnetic release to achieve the protection function. When a general overload occurs in the circuit, the overload current will cause the bimetallic strip to heat and bend, and then push the lever, so that the hook and the latch are disengaged, and the main contact is disconnected to cut off the power supply. When a short circuit or serious overload occurs in the circuit, the short-circuit current will cause the electromagnetic release to generate a large enough suction force to attract the armature and hit the lever, so that the hook and the latch are disengaged, and the main contact is quickly disconnected to cut off the power supply.

[0008] The residual current operated circuit breaker is a type of low-voltage switch, which can quickly cut off the faulty power supply in an extremely short time to protect the safety of personnel and electrical equipment. After the production of the residual current operated circuit breaker is completed, it needs to be calibrated and detected to ensure that it meets the use standards and can reliably operate under different fault conditions. In the process of sectional calibration and detection of traditional low-voltage switches, their calibration and detection devices have problems such as single function and low detection accuracy, and it is difficult to meet the requirements of modern distribution networks for safety, reliability, and intelligence.

[0009] In addition, the existing calibration devices cannot meet the needs of intelligent and automated detection work. Summary of the Invention

[0010] Based on the problems existing in the prior art, the present invention proposes a segmented calibration and detection method based on a low-voltage intelligent switch, which is suitable for use on low-voltage power distribution equipment.

[0011] To achieve the above object, the present invention adopts the following technical solutions: A segmented calibration and detection method based on a low-voltage intelligent switch, which includes a frame. A clamping component is fixedly connected to the left side of the inner cavity of the frame. A residual current operated circuit breaker is clamped in the inner cavity of the clamping component. An electric push rod is fixedly connected to the top of the frame and on one side of the residual current operated circuit breaker. A front-back adjustment component is fixedly connected to the top of the electric push rod. Fine adjustment components are fixedly connected to both ends of the front-back adjustment component. A short-circuit test generator, an ammeter and a voltmeter are respectively fixedly connected to the front end of the other side of the top of the frame. A variable resistor, a variable transformer and a leakage simulator are respectively fixedly connected to the rear end of the other side of the top of the frame. A support rod is fixedly connected to the front end of the top of the frame. A control computer is fixedly connected to the top of the support rod. The frame includes a workbench. A moving groove is opened on one side of the top of the workbench. An installation groove is opened between the two moving grooves. Table legs are fixedly connected to the four corners of the bottom of the frame. A toolbox is fixedly connected to one side of the frame. A box door is movably connected to the surface of the toolbox through a hinge. The clamping component includes a double-output shaft motor fixedly connected to the inner cavity of the installation groove. First lead screws are fixedly connected to both ends of the double-output shaft motor. The other ends of the first lead screws are fixedly connected to the inner walls of the moving grooves through bearings. Clamping plates are movably connected to the surfaces of the first lead screws. Rubber pads are bonded to the surfaces of the clamping plates through adhesives. Patch-type pressure sensors are fixedly connected to the surfaces of the clamping plates. Infrared rangefinders are fixedly connected to the front and rear ends of the surfaces of the clamping plates and on one side of the patch-type pressure sensors. One sides of the patch-type pressure sensors and the infrared rangefinders extend to the surfaces of the rubber pads. The front-back adjustment component includes a connecting plate fixedly connected to the top of the electric push rod. A sliding groove is opened in the inner cavity of the connecting plate. First limiting grooves are opened on both sides of the inner cavity of the sliding groove. A sliding rod is slidably connected to the inner cavity of the sliding groove. First limiting blocks are fixedly connected to both sides of the sliding rod. The other sides of the first limiting blocks extend into the inner cavities of the first limiting grooves. A jack is opened on the top of the connecting plate. A fastening block is arranged in the inner cavity of the jack. A moving plate is fixedly connected to the top of the fastening block. A second lead screw is threadedly connected to the center of the moving plate. The bottom of the second lead screw is fixedly connected to the top of the connecting plate through a bearing. The fine adjustment component includes an installation box fixedly connected to the surface of the sliding rod. A third lead screw is threadedly connected to the center of the top of the installation box. The bottom of the third lead screw is fixedly connected to a downward pressure fixing plate through a bearing. A fastening rod is slidably connected to the inner cavity of the downward pressure fixing plate. A spring is sleeved on the surface of the fastening rod. The top of the spring is fixedly connected to the bottom of the downward pressure fixing plate. The bottom of the spring is fixedly connected to a slider. An installation hole is opened on the top of the slider. The bottom of the fastening rod extends into the inner cavity of the installation hole. A sliding hole is opened in the inner cavity of the slider. A sliding rod is slidably connected to the inner cavity of the sliding hole. Both ends of the sliding rod are fixedly connected to the inner walls of the installation box.The bottom of the slider is fixedly connected with a plug post, and the bottom of the plug post penetrates through the bottom of the installation box.

[0012] Preferably, a handle is fixedly connected to the surface of the box door, and maintenance and adjustment tools are placed in the inner cavity of the toolbox.

[0013] Preferably, external threads are provided on the surface of the first lead screw, and the threads on the surfaces of the two first lead screws are designed in the reverse direction. A threaded moving block is fixedly connected to the bottom of the clamping plate. The threaded moving block is slidably connected to the inner cavity of the moving groove, and a first threaded hole for cooperating with the first lead screw is provided in the inner cavity of the threaded moving block.

[0014] Preferably, limit rods are fixedly connected to the bottoms on both sides of the double-output shaft motor. The other ends of the limit rods penetrate through the threaded moving block and are fixedly connected to the inner wall of the moving groove.

[0015] Preferably, installation grooves for installing a patch type pressure sensor and an infrared rangefinder are provided on the surface of the clamping plate, and through holes for passing the patch type pressure sensor and the infrared rangefinder are provided on the surface of the rubber pad.

[0016] Preferably, the jack and the sliding groove are communicated, and the bottom of the fastening block is designed in an arc shape and is used in cooperation with the cylindrical sliding rod.

[0017] Preferably, a second threaded hole is provided at the center of the moving plate, and the second threaded hole is used in cooperation with the second lead screw. The top of the second lead screw is fixedly connected with a first hand wheel.

[0018] Preferably, a third threaded hole is provided at the top of the installation box, and the third threaded hole is used in cooperation with the third lead screw. The top of the third lead screw is fixedly connected with a second hand wheel.

[0019] Preferably, movable grooves for the fastening rod and the plug post to move are respectively provided in the inner cavity of the downward pressing fixed plate and the bottom of the installation box. Second limit grooves are provided on both sides of the inner cavity of the jack. Second limit blocks are slidably connected in the inner cavities of the second limit grooves. The other sides of the second limit blocks are fixedly connected to the surface of the fastening rod. The bottom of the fastening rod is designed in an arc shape and is used in cooperation with the cylindrical sliding rod.

[0020] A detection method for a sectional calibration device based on a low-voltage intelligent switch includes the following steps:

[0021] S1. First, place the residual current operated circuit breaker that needs to be calibrated and tested in sections between two clamping plates. Then, start the dual-output shaft motor, which drives the first screw to rotate. The first screw drives the clamping plate to move through the threaded moving block. The clamping plate drives the SMD pressure sensor and the infrared rangefinder to move. When the distance detected by the infrared rangefinder is zero and the pressure detected by the SMD pressure sensor meets the standard value, the clamping and fixing work is completed.

[0022] S2, then the electric push rod is contracted to drive the connecting plate to move downward, which can drive the front and rear adjustment components and the fine-tuning components to move downward. After adjusting to the appropriate position, the first hand wheel is turned, the first hand wheel drives the second screw rod to rotate, the second screw rod drives the moving plate to move, and the moving plate drives the fastening block to move, so as to release the locking state with the slide bar, and then the two fine-tuning components can be stretched forward and backward. After adjusting the front and rear distance of the fine-tuning components, the first hand wheel can be reversed to lock and fix the slide bar again, thereby fixing the positions of the front and rear fine-tuning components;

[0023] S3, then the plug column is driven to drive the slider to slide on the surface of the sliding rod. When the plug column corresponds to the wiring port on the surface of the residual current operated circuit breaker one by one, the third screw rod can be driven to rotate by turning the second hand wheel, and the third screw rod drives the downward pressing fixing plate to move downward, and the downward pressing fixing plate squeezes the fastening rod to move downward, and the bottom of the fastening rod squeezes and locks the sliding rod to fix the slider in the current position. At this time, the position of the plug column is adjusted, and then the plug column is driven to be inserted into the wiring port on the surface of the residual current operated circuit breaker by continuing to shrink the electric push rod, so that the circuit is connected. Then, other residual current operated circuit breakers of the same model can be adjusted and tested in batches;

[0024] S4. During segmented calibration and testing:

[0025] a. First, adjust the residual current protection. Set the residual action current threshold through the built-in intelligent control communication module of the residual current operated circuit breaker. Combined with the microprocessor high-speed sampling operation module, calibrate the detection accuracy. Then connect the leakage simulator, gradually increase the leakage current to the set value, observe the action of the trip actuator, and after the residual current detection coil senses the leakage current, generate an electrical signal to trigger the release, drive the arc extinguishing chamber contacts to break. If the breaking time exceeds the specified time, fine-tune the release spring tension and optimize the detection coil sensitivity. Repeat the test until it meets the standard.

[0026] b. Then, perform overcurrent protection calibration. According to the rated current of the switch, set 1.1 times the overcurrent through the adjustable resistor, connect the load, monitor the time. The bimetal sheet of the thermal-magnetic release bends due to the current heating, pushing the tripping mechanism to separate the contacts. The arc extinguishing chamber starts to extinguish the arc, record the breaking time. If the tripping time is abnormal, adjust the distance between the bimetal sheet and the heating element, and calibrate the current sampling threshold until the protection characteristics are met;

[0027] c. Then, perform short-circuit protection calibration. Use the short-circuit test generator to output a short-circuit current of 5 - 10 times the rated current. The electromagnetic release instantaneously generates a strong magnetic field, driving the armature to impact the tripping mechanism, and the contacts quickly separate. The arc extinguishing chamber extinguishes the arc through the three-dimensional grid. Use the oscilloscope inside the control computer to record the breaking time. If the breaking is delayed, adjust the air gap size of the electromagnetic release to improve the tripping sensitivity;

[0028] d. Finally, when the single-item calibration is completed, simulate a comprehensive fault (such as overcurrent + leakage) to verify the cooperation of each protection function and structure. When the residual current detection triggers tripping, the arc extinguishing chamber breaks normally; after overcurrent tripping, the short-circuit protection can still respond. Record the full-process data through the control computer to ensure the reliability and stability of the low-voltage switch after sectional calibration.

[0029] Compared with the prior art, the advantages and positive effects of the sectional calibration and detection method based on the low-voltage intelligent switch of the present invention are as follows:

[0030] 1. Through the clamping assembly provided in the present invention, residual current operated circuit breakers of different sizes can be clamped and fixed efficiently and quickly. And through the patch type pressure sensor and the infrared rangefinder provided, the clamping distance and clamping force can be accurately controlled, and it can avoid damaging the residual current operated circuit breaker due to excessive clamping force.

[0031] 2. Through the front-back adjustment assembly provided in the present invention, the front-back position of the plug post can be adjusted so that it can adapt to residual current operated circuit breakers of different lengths, and can be accurately inserted into the power connection port at the top of the residual current operated circuit breaker. And after the adjustment is completed, the detection work of this batch of models of residual current operated circuit breakers can be carried out in batches.

[0032] 3. Through the fine adjustment assembly provided in the present invention, the distance between the plug posts can be adjusted, so that it can be more accurately inserted into the power connection port of the residual current operated circuit breaker, and there will be no phenomenon that it cannot be inserted and the circuit cannot be closed, which brings great convenience to the subsequent sectional calibration and detection work.

[0033] 4. By providing the first limiting groove and the first limiting block in the front-back adjustment component of the present invention, the sliding rod can be prevented from disengaging from the sliding groove. By providing the second limiting groove and the second limiting block in the fine adjustment component, the fastening rod can always be fitted into the inner cavity of the mounting hole, preventing the fastening rod from disengaging from the slider. At the same time, the provided spring can ensure that the bottom of the fastening rod does not contact the sliding rod under normal conditions.

[0034] 5. By providing the short-circuit test generator, ammeter, voltmeter, adjustable resistor, adjustable transformer, leakage simulator and control computer in the present invention, accurate segmented calibration of functions such as residual current protection, overload protection, and short-circuit protection can be achieved. And through segmented calibration, it can ensure that the residual current operated circuit breaker accurately responds to faults in the circuit, maximizing the protection of equipment and personnel safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 FIG. is a three-dimensional structural schematic diagram of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0036] Figure 2 FIG. is a rear three-dimensional structural schematic diagram of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0037] Figure 3 FIG. is a three-dimensional structural schematic diagram of the frame of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0038] Figure 4 FIG. is a three-dimensional structural schematic diagram of the clamping component of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0039] Figure 5 FIG. is a three-dimensional connection structure schematic diagram of the clamping plate and the rubber pad of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0040] Figure 6 FIG. is a connection structure schematic diagram of the front-back adjustment component and the fine adjustment component of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0041] Figure 7 FIG. is an exploded structure schematic diagram of the front-back adjustment component and the fine adjustment component of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0042] Figure 8 FIG. is a bottom-up sectional view schematic diagram of the connecting plate of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0043] Figure 9Internal structural schematic diagram of a fine-tuning component of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0044] Figure 10 Explosion schematic diagram of a fine-tuning component of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0045] Figure 11 Cross-sectional structural schematic diagram of a fine-tuning component of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention;

[0046] Figure 12 Cross-sectional schematic diagram of the connection structure between a slider and a plug post of a segmented calibration and detection method based on a low-voltage intelligent switch according to the present invention.

[0047] Explanation of reference numerals in the drawings: 1, frame; 101, workbench; 102, moving groove; 103, toolbox; 2, clamping component; 21, double-output shaft motor; 22, first lead screw; 23, clamping plate; 24, rubber pad; 25, patch type pressure sensor; 26, infrared rangefinder; 27, limiting rod; 3, residual current operated circuit breaker; 4, electric push rod; 5, front and rear adjustment component; 51, connecting plate; 52, sliding groove; 53, first limiting groove; 54, sliding rod; 55, first limiting block; 56, jack; 57, fastening block; 58, moving plate; 59, second lead screw; 6, fine-tuning component; 61, installation box; 62, third lead screw; 63, downward pressing fixed plate; 64, fastening rod; 65, spring; 66, slider; 67, installation hole; 68, sliding hole; 69, sliding rod; 610, plug post; 611, second limiting groove; 612, second limiting block; 7, short-circuit test generator; 8, ammeter; 9, voltmeter; 10, adjustable resistor; 11, adjustable transformer; 12, leakage simulator; 13, support rod; 14, control computer. Detailed implementation manners

[0048] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0049] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0050] The present invention adopts the following technical solution: A segmented calibration and detection method based on a low-voltage intelligent switch, which includes a frame 1. On the left side of the inner cavity of the frame 1, a clamping assembly 2 is fixedly connected. A residual current operated circuit breaker 3 is clamped in the inner cavity of the clamping assembly 2. On the top of the frame 1 and on one side of the residual current operated circuit breaker 3, an electric push rod 4 is fixedly connected. On the top of the electric push rod 4, a front-back adjustment assembly 5 is fixedly connected. At both ends of the front-back adjustment assembly 5, a fine adjustment assembly 6 is fixedly connected. At the front end of the other side of the top of the frame 1, a short-circuit test generator 7, an ammeter 8 and a voltmeter 9 are respectively fixedly connected. At the rear end of the other side of the top of the frame 1, a variable resistor 10, a variable transformer 11 and a leakage simulator 12 are respectively fixedly connected. At the front end of the top of the frame 1, a support rod 13 is fixedly connected. On the top of the support rod 13, a control computer 14 is fixedly connected. The frame 1 includes a workbench 101. On one side of the top of the workbench 101, a moving groove 102 is opened. An installation groove is opened between the two moving grooves 102. At the four corners of the bottom of the frame 1, table legs are fixedly connected. On one side of the frame 1, a toolbox 103 is fixedly connected. The surface of the toolbox 103 is movably connected with a box door through a hinge. The clamping assembly 2 includes a double-output shaft motor 21 fixedly connected to the inner cavity of the installation groove. At both ends of the double-output shaft motor 21, a first lead screw 22 is fixedly connected. The other end of the first lead screw 22 is fixedly connected to the inner wall of the moving groove 102 through a bearing. A clamping plate 23 is movably connected to the surface of the first lead screw 22. A rubber pad 24 is bonded to the surface of the clamping plate 23 through an adhesive. A patch type pressure sensor 25 is fixedly connected to the surface of the clamping plate 23. Infrared rangefinders 26 are fixedly connected to the front and rear ends of the surface of the clamping plate 23 where the patch type pressure sensor 25 is located. One side of the patch type pressure sensor 25 and the infrared rangefinders 26 extends to the surface of the rubber pad 24. The front-back adjustment assembly 5 includes a connecting plate 51 fixedly connected to the top of the electric push rod 4. A sliding groove 52 is opened in the inner cavity of the connecting plate 51. First limiting grooves 53 are opened on both sides of the inner cavity of the sliding groove 52. A sliding rod 54 is slidably connected to the inner cavity of the sliding groove 52. First limiting blocks 55 are fixedly connected to both sides of the sliding rod 54. The other side of the first limiting block 55 extends into the inner cavity of the first limiting groove 53. A jack 56 is opened on the top of the connecting plate 51. A fastening block 57 is arranged in the inner cavity of the jack 56. A moving plate 58 is fixedly connected to the top of the fastening block 57. A second lead screw 59 is threadedly connected to the center of the moving plate 58. The bottom of the second lead screw 59 is fixedly connected to the top of the connecting plate 51 through a bearing. The fine adjustment assembly 6 includes an installation box 61 fixedly connected to the surface of the sliding rod 54. A third lead screw 62 is threadedly connected to the center of the top of the installation box 61. The bottom of the third lead screw 62 is fixedly connected to a pressing and fixing plate 63 through a bearing. A fastening rod 64 is slidably connected to the inner cavity of the pressing and fixing plate 63. A spring 65 is sleeved on the surface of the fastening rod 64. The top of the spring 65 is fixedly connected to the bottom of the pressing and fixing plate 63. The bottom of the spring 65 is fixedly connected to a slider 66. An installation hole 67 is opened on the top of the slider 66.The bottom of the fastening rod 64 extends into the inner cavity of the mounting hole 67. A sliding hole 68 is provided in the inner cavity of the slider 66. A sliding rod 69 is slidably connected in the inner cavity of the sliding hole 68. Both ends of the sliding rod 69 are fixedly connected to the inner wall of the mounting box 61. The bottom of the slider 66 is fixedly connected with a plug post 610. The bottom of the plug post 610 penetrates through the bottom of the mounting box 61.,

[0051] With the above technical solutions, through the clamping assembly 2 provided, the residual current operated circuit breaker 3 of different sizes can be clamped and fixed efficiently and quickly. And through the patch type pressure sensor 25 and the infrared rangefinder 26 provided, the clamping distance and the clamping force can be accurately controlled, and the damage to the residual current operated circuit breaker 3 caused by excessive clamping force can be avoided. Through the front and rear adjustment assembly 5, the front and rear positions of the plug post 610 can be adjusted, so that it can adapt to the residual current operated circuit breaker 3 of different lengths and can be accurately inserted into the power connection port at the top of the residual current operated circuit breaker 3. And after the adjustment is completed, the detection work of this batch of residual current operated circuit breakers 3 can be carried out in batches. Through the fine adjustment assembly 6, the distance between the plug posts 610 can be adjusted, so that it can be more accurately inserted into the power connection port of the residual current operated circuit breaker 3, and the phenomenon that it cannot be inserted and the circuit cannot be closed will not occur, which brings great convenience to the subsequent sectional calibration and detection work. Through the short-circuit test generator 7, the ammeter 8, the voltmeter 9, the adjustable resistor 10, the adjustable transformer 11, the leakage simulator 12 and the control computer 14, the accurate sectional calibration of functions such as residual current protection, overload protection and short-circuit protection can be realized. And through the sectional calibration, it can be ensured that the residual current operated circuit breaker 3 accurately responds to faults in the circuit, and the safety of equipment and personnel can be protected to the greatest extent.

[0052] In addition, a handle is fixedly connected to the surface of the box door, and maintenance and adjustment tools are placed in the inner cavity of the tool box 103. An external thread is provided on the surface of the first screw rod 22, and the threads on the surfaces of the two first screw rods 22 are of reverse design. A threaded moving block is fixedly connected to the bottom of the clamping plate 23, and the threaded moving block is slidably connected to the inner cavity of the moving groove 102, and the inner cavity of the threaded moving block is provided with a first threaded hole used in conjunction with the first screw rod 22. The bottoms of both sides of the dual-output shaft motor 21 are fixedly connected to limit rods 27, and the other end of the limit rod 27 passes through the threaded moving block and is fixedly connected to the inner wall of the moving groove 102. The surface of the clamping plate 23 is provided with mounting grooves for mounting a patch pressure sensor 25 and an infrared rangefinder 26. The surface of the rubber pad 24 is provided with through holes for passing the patch pressure sensor 25 and the infrared rangefinder 26. The handle can open the box door conveniently and quickly, so that the tools placed inside the tool box 103 can be easily taken out. The threads on the surfaces of the two first screw rods 22 are designed in reverse, which can realize the opposite movement of the two clamping plates 23 under the drive of the same power. The setting of the limit rod 27 can limit the threaded moving block to prevent it from rotating with the first screw rod 22. The opening of the mounting groove can facilitate the disassembly and assembly of the patch pressure sensor 25 and the infrared rangefinder 26. The setting of the through hole can expose the detection surfaces of the patch pressure sensor 25 and the infrared rangefinder 26 to the outside, so as to realize smooth detection work.

[0053] Furthermore, the jack 56 is connected to the sliding groove 52, and the bottom of the fastening block 57 adopts an arc-shaped design, which is used in conjunction with the cylindrical sliding rod 54. A second threaded hole is opened at the axis of the movable plate 58, and the second threaded hole is used in conjunction with the second screw rod 59. The top of the second screw rod 59 is fixedly connected with a first hand wheel. The connection between the jack 56 and the sliding groove 52 can enable the fastening block 57 to be smoothly inserted into the inner cavity of the sliding groove 52, so that the sliding rod 54 can be tightened and fixed, and the bottom of the fastening block 57 adopts an arc-shaped design, which can make the bottom of the fastening block 57 fit tightly against the surface of the sliding rod 54, thereby ensuring the locking effect.

[0054] Preferably, a third threaded hole is formed in the top of the installation box 61 and is used in cooperation with the third lead screw 62. The top of the third lead screw 62 is fixedly connected with a second hand wheel. Activity grooves for the movement of the fastening rod 64 and the insertion post 610 are respectively formed in the inner cavity of the pressing fixed plate 63 and the bottom of the installation box 61. Second limiting grooves 611 are formed on both sides of the inner cavity of the insertion hole 56. A second limiting block 612 is slidably connected in the inner cavity of the second limiting groove 611. The other side of the second limiting block 612 is fixedly connected to the surface of the fastening rod 64. The bottom of the fastening rod 64 is designed in an arc shape and is used in cooperation with the cylindrical sliding rod 69. The formation of the activity groove enables the fastening rod 64 and the insertion post 610 to move smoothly left and right, so as to realize the fine adjustment of the insertion post 610. The arrangement of the second limiting groove 611 and the second limiting block 612 can limit the fastening rod 64 in the inner cavity of the installation hole 67 and prevent the fastening rod 64 from detaching from the slider 66. At the same time, the arranged spring 65 can ensure that the bottom of the fastening rod 64 does not contact the sliding rod 69 under normal conditions. At the same time, the bottom of the fastening rod 64 is designed in an arc shape, which can closely fit the bottom of the fastening rod 64 on the top of the sliding rod 69, realizing a good locking function.

[0055] The following further describes a method for sectional calibration and detection of a low-voltage intelligent switch according to the present invention with reference to specific embodiments.

[0056] Such as Figures 1 - 12As shown in the figure, the present invention provides a segmented calibration and detection method based on a low-voltage intelligent switch, which includes a frame 1. On the left side of the inner cavity of the frame 1, a clamping assembly 2 is fixedly connected. A residual current operated circuit breaker 3 is clamped in the inner cavity of the clamping assembly 2. On the top of the frame 1 and on one side of the residual current operated circuit breaker 3, an electric push rod 4 is fixedly connected. On the top of the electric push rod 4, a front and rear adjustment assembly 5 is fixedly connected. At both ends of the front and rear adjustment assembly 5, a fine adjustment assembly 6 is fixedly connected. On the front end of the other side of the top of the frame 1, a short-circuit test generator 7, an ammeter 8 and a voltmeter 9 are respectively fixedly connected. On the rear end of the other side of the top of the frame 1, a variable resistor 10, a variable transformer 11 and a leakage simulator 12 are respectively fixedly connected. On the front end of the top of the frame 1, a support rod 13 is fixedly connected. On the top of the support rod 13, a control computer 14 is fixedly connected. The frame 1 includes a workbench 101. On one side of the top of the workbench 101, a moving groove 102 is opened. An installation groove is opened between the two moving grooves 102. At the four corners of the bottom of the frame 1, table legs are fixedly connected. On one side of the frame 1, a toolbox 103 is fixedly connected. The surface of the toolbox 103 is movably connected with a box door through a hinge. The clamping assembly 2 includes a double-output shaft motor 21 fixedly connected to the inner cavity of the installation groove. At both ends of the double-output shaft motor 21, a first lead screw 22 is fixedly connected. The other end of the first lead screw 22 is fixedly connected to the inner wall of the moving groove 102 through a bearing. A clamping plate 23 is movably connected to the surface of the first lead screw 22. A rubber pad 24 is bonded to the surface of the clamping plate 23 through an adhesive. A patch type pressure sensor 25 is fixedly connected to the surface of the clamping plate 23. Infrared rangefinders 26 are fixedly connected to the front and rear ends of the surface of the clamping plate 23 and on both sides of the patch type pressure sensor 25. One side of the patch type pressure sensor 25 and the infrared rangefinders 26 extends to the surface of the rubber pad 24. The front and rear adjustment assembly 5 includes a connecting plate 51 fixedly connected to the top of the electric push rod 4. A sliding groove 52 is opened in the inner cavity of the connecting plate 51. First limiting grooves 53 are opened on both sides of the inner cavity of the sliding groove 52. A sliding rod 54 is slidably connected in the inner cavity of the sliding groove 52. First limiting blocks 55 are fixedly connected to both sides of the sliding rod 54. The other side of the first limiting blocks 55 extends into the inner cavity of the first limiting grooves 53. A jack 56 is opened on the top of the connecting plate 51. A fastening block 57 is arranged in the inner cavity of the jack 56. A moving plate 58 is fixedly connected to the top of the fastening block 57. A second lead screw 59 is threadedly connected to the center of the moving plate 58. The bottom of the second lead screw 59 is fixedly connected to the top of the connecting plate 51 through a bearing. The fine adjustment assembly 6 includes an installation box 61 fixedly connected to the surface of the sliding rod 54. A third lead screw 62 is threadedly connected to the center of the top of the installation box 61. The bottom of the third lead screw 62 is fixedly connected to a pressing and fixing plate 63 through a bearing. A fastening rod 64 is slidably connected in the inner cavity of the pressing and fixing plate 63. A spring 65 is sleeved on the surface of the fastening rod 64. The top of the spring 65 is fixedly connected to the bottom of the pressing and fixing plate 63. The bottom of the spring 65 is fixedly connected to a slider 66. An installation hole 67 is opened on the top of the slider 66.The bottom of the fastening rod 64 extends into the inner cavity of the mounting hole 67. A sliding hole 68 is formed in the inner cavity of the slider 66. A sliding rod 69 is slidably connected in the inner cavity of the sliding hole 68. Both ends of the sliding rod 69 are fixedly connected to the inner wall of the mounting box 61. A plug post 610 is fixedly connected to the bottom of the slider 66. The bottom of the plug post 610 penetrates through the bottom of the mounting box 61.

[0057] Next, specifically describe the specific settings and functions of its clamping assembly 2, front and rear adjustment assembly 5, and fine adjustment assembly 6.

[0058] As Figure 4 and Figure 5 shown, the clamping assembly 2 includes a double-output shaft motor 21 fixedly connected to the inner cavity of the mounting groove. Both ends of the double-output shaft motor 21 are fixedly connected with a first lead screw 22. The other end of the first lead screw 22 is fixedly connected to the inner wall of the moving groove 102 through a bearing. A clamping plate 23 is movably connected to the surface of the first lead screw 22. A rubber pad 24 is bonded to the surface of the clamping plate 23 through an adhesive. A patch type pressure sensor 25 is fixedly connected to the surface of the clamping plate 23. Infrared rangefinders 26 are fixedly connected to both the front and rear ends of the surface of the clamping plate 23 and on the side of the patch type pressure sensor 25. One side of the patch type pressure sensor 25 and the infrared rangefinders 26 extends to the surface of the rubber pad 24. External threads are provided on the surface of the first lead screw 22, and the threads on the surfaces of the two first lead screws 22 are designed in the reverse direction. A threaded moving block is fixedly connected to the bottom of the clamping plate 23. The threaded moving block is slidably connected to the inner cavity of the moving groove 102, and a first threaded hole for cooperating with the first lead screw 22 is formed in the inner cavity of the threaded moving block. Limit rods 27 are fixedly connected to the bottoms on both sides of the double-output shaft motor 21. The other ends of the limit rods 27 penetrate through the threaded moving block and are fixedly connected to the inner wall of the moving groove 102. Mounting grooves for mounting the patch type pressure sensor 25 and the infrared rangefinders 26 are formed on the surface of the clamping plate 23. Through holes for passing the patch type pressure sensor 25 and the infrared rangefinders 26 are formed on the surface of the rubber pad 24.

[0059] The overall effect achieved by the entire clamping assembly 2 is that it can efficiently and quickly clamp and fix residual current operated circuit breakers 3 of different sizes, and through the provided patch type pressure sensor 25 and infrared rangefinders 26, the clamping distance and clamping force can be accurately controlled, and it can avoid damaging the residual current operated circuit breaker 3 due to excessive clamping force.

[0060] As Figure 6 、 Figure 7 and Figure 8As shown in the figure, the front and rear adjustment assembly 5 includes a connecting plate 51 fixedly connected to the top of the electric push rod 4. A sliding groove 52 is provided in the inner cavity of the connecting plate 51. First limiting grooves 53 are provided on both sides of the inner cavity of the sliding groove 52. A sliding rod 54 is slidably connected in the inner cavity of the sliding groove 52. First limiting blocks 55 are fixedly connected to both sides of the sliding rod 54. The other side of the first limiting block 55 extends into the inner cavity of the first limiting groove 53. A jack 56 is provided on the top of the connecting plate 51. A fastening block 57 is arranged in the inner cavity of the jack 56. A moving plate 58 is fixedly connected to the top of the fastening block 57. A second lead screw 59 is threadedly connected to the center of the moving plate 58. The bottom of the second lead screw 59 is fixedly connected to the top of the connecting plate 51 through a bearing. The jack 56 and the sliding groove 52 are communicated. The bottom of the fastening block 57 is designed in an arc shape and is used in cooperation with the cylindrical sliding rod 54. A second threaded hole is provided at the center of the moving plate 58 and is used in cooperation with the second lead screw 59. A first hand wheel is fixedly connected to the top of the second lead screw 59.

[0061] The effect achieved by the entire front and rear adjustment assembly 5 is that it can adjust the front and rear positions of the plug post 610 so that it can adapt to residual current operated circuit breakers 3 of different lengths, can accurately insert into the power connection port at the top of the residual current operated circuit breaker 3, and after the adjustment is completed, it can batch detect the residual current operated circuit breakers 3 of this batch of models.

[0062] Such as Figure 9 , Figure 10 , Figure 11 and Figure 12As shown in the figure, the fine-tuning component 6 includes a mounting box 61 fixedly connected to the surface of the sliding rod 54. At the axial center of the top of the mounting box 61, a third lead screw 62 is threadedly connected. The bottom of the third lead screw 62 is fixedly connected to a downward pressure fixing plate 63 through a bearing. A fastening rod 64 is slidably connected to the inner cavity of the downward pressure fixing plate 63. A spring 65 is sleeved on the surface of the fastening rod 64. The top of the spring 65 is fixedly connected to the bottom of the downward pressure fixing plate 63. The bottom of the spring 65 is fixedly connected to a slider 66. An installation hole 67 is opened at the top of the slider 66. The bottom of the fastening rod 64 extends into the inner cavity of the installation hole 67. A sliding hole 68 is opened in the inner cavity of the slider 66. A sliding rod 69 is slidably connected to the inner cavity of the sliding hole 68. Both ends of the sliding rod 69 are fixedly connected to the inner wall of the mounting box 61. The bottom of the slider 66 is fixedly connected to a plug post 610. The bottom of the plug post 610 penetrates through the bottom of the mounting box 61. A third threaded hole is opened at the top of the mounting box 61. The third threaded hole is used in cooperation with the third lead screw 62. The top of the third lead screw 62 is fixedly connected to a second handwheel. An activity groove for the movement of the fastening rod 64 and the plug post 610 is respectively opened in the inner cavity of the downward pressure fixing plate 63 and the bottom of the mounting box 61. Second limiting grooves 611 are respectively opened on both sides of the inner cavity of the jack 56. A second limiting block 612 is slidably connected to the inner cavity of the second limiting groove 611. The other side of the second limiting block 612 is fixedly connected to the surface of the fastening rod 64. The bottom of the fastening rod 64 is designed in an arc shape and is used in cooperation with the cylindrical sliding rod 69.

[0063] The effect achieved by the entire fine-tuning component 6 is that it can adjust the distance between the plug posts 610, so that it can be inserted more accurately into the power connection ports of the residual current operated circuit breaker 3, and there will be no phenomenon that it cannot be inserted and the circuit cannot be closed, which brings great convenience to the subsequent sectional calibration and detection work.

[0064] The working principle of a sectional calibration and detection method based on a low-voltage intelligent switch is as follows: 1. Place the residual current operated circuit breaker 3 that needs to be sectionally calibrated and detected between two clamping plates 23. Then, by starting the double-output shaft motor 21, the double-output shaft motor 21 drives the first lead screw 22 to rotate. The first lead screw 22 drives the clamping plate 23 to move through the threaded moving block. The clamping plate 23 drives the patch type pressure sensor 25 and the infrared rangefinder 26 to move. After the distance detected by the infrared rangefinder 26 is zero and the pressure detected by the patch type pressure sensor 25 meets the standard value, it means that the clamping and fixing work is completed at this time.

[0065] 2. By contracting the electric push rod 4 and driving the connecting plate 51 to move downward, the front and rear adjustment components 5 and the fine-tuning components 6 can be driven downward to move. After adjusting to the appropriate position, by turning the first hand wheel, the first hand wheel drives the second screw rod 59 to rotate, the second screw rod 59 drives the moving plate 58 to move, and the moving plate 58 drives the fastening block 57 to move, so as to release the locking state with the slide bar 54, and then the two fine-tuning components 6 can be stretched forward and backward. After adjusting the front and rear distance of the fine-tuning components 6, the first hand wheel can be reversed to lock and fix the slide bar 54 again, thereby fixing the positions of the front and rear fine-tuning components 6.

[0066] 3. Then, the slider 66 is driven to slide on the surface of the sliding rod 69 by toggling the plug post 610. When the plug post 610 corresponds to the wiring port on the surface of the residual current operated circuit breaker 3 one by one, the third screw rod 62 can be driven to rotate by turning the second hand wheel. The third screw rod 62 drives the downward pressing fixing plate 63 to move downward. The downward pressing fixing plate 63 squeezes the fastening rod 64 to move downward. The bottom of the fastening rod 64 squeezes and locks the sliding rod 69 to fix the slider 66 in the current position. At this time, the position of the plug post 610 is adjusted, and then the plug post 610 is driven to be inserted into the wiring port on the surface of the residual current operated circuit breaker 3 by continuing to contract the electric push rod 4 to complete the circuit connection work. Then, other residual current operated circuit breakers 3 of the same model can be calibrated and tested in batches.

[0067] 4. During segmented calibration and testing:

[0068] a. First, perform residual current protection adjustment. Set the residual action current threshold through the built-in intelligent control communication module of the residual current operated circuit breaker 3. Combined with the microprocessor high-speed sampling operation module, calibrate the detection accuracy. Then connect the leakage simulator 12, gradually increase the leakage current to the set value, observe the action of the trip actuator, and after the residual current detection coil senses the leakage current, generate an electrical signal to trigger the tripper, drive the arc extinguishing chamber contact to disconnect. If the disconnection time exceeds the specified time, fine-tune the tension of the tripper spring 65 and optimize the sensitivity of the detection coil. Repeat the test until it meets the standard;

[0069] b. Then adjust the overload protection. According to the rated current of the switch, set the overload current of 1.1 times through the adjustable resistor 10, connect the load, monitor the time, the bimetallic strip of the thermal magnetic release is bent due to the heat of the current, pushes the tripping mechanism to disconnect the contact, the arc extinguishing chamber starts to extinguish the arc, and records the disconnection time. If the tripping time is abnormal, adjust the distance between the bimetallic strip and the heating element, and calibrate the current sampling threshold until the protection characteristics are met;

[0070] c. Then, conduct short-circuit protection calibration. Use the short-circuit test generator 7 to output a short-circuit current that is 5-10 times the rated current. The electromagnetic release instantaneously generates a strong magnetic field, driving the armature to strike the tripping mechanism, causing the contacts to quickly break. The arc extinguishing chamber extinguishes the arc through three-dimensional grid plates. Use the oscilloscope inside the control computer 14 to record the breaking time. If the breaking is delayed, adjust the air gap of the electromagnetic release to improve the tripping sensitivity;

[0071] d. Finally, when the single-item calibration is completed, simulate a comprehensive fault (such as overload + leakage) to verify the cooperation between each protection function and the structure. When the residual current detection triggers a trip, the arc extinguishing chamber breaks normally; after the overload trip, the short-circuit protection can still respond. Record the full-process data through the control computer 14 to ensure the reliability and stability of the low-voltage switch after section calibration.

[0072] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A segmented calibration device based on a low-voltage intelligent switch, which comprises a frame (1), and is characterized in that: On the left side of the inner cavity of the frame (1), a clamping component (2) is fixedly connected. The residual current operated circuit breaker (3) is clamped inside the clamping component (2). On the top of the frame (1) and on one side of the residual current operated circuit breaker (3), an electric push rod (4) is fixedly connected. On the top of the electric push rod (4), a front-back adjustment component (5) is fixedly connected. Both ends of the front-back adjustment component (5) are fixedly connected with fine adjustment components (6). On the front end of the other side of the top of the frame (1), a short-circuit test generator (7), an ammeter (8) and a voltmeter (9) are respectively fixedly connected. On the rear end of the other side of the top of the frame (1), a variable resistor (10), a variable transformer (11) and a leakage simulator (12) are respectively fixedly connected. On the front end of the top of the frame (1), a support rod (13) is fixedly connected. On the top of the support rod (13), a control computer (14) is fixedly connected; The frame (1) includes a workbench (101). On one side of the top of the workbench (101), a moving groove (102) is provided. An installation groove is provided between the two moving grooves (102). Table legs are fixedly connected to the four corners of the bottom of the frame (1). A toolbox (103) is fixedly connected to one side of the frame (1). A box door is movably connected to the surface of the toolbox (103) through a hinge; The clamping component (2) includes a double-output shaft motor (21) fixedly connected to the inner cavity of the installation groove. Both ends of the double-output shaft motor (21) are fixedly connected with first lead screws (22). The other ends of the first lead screws (22) are fixedly connected to the inner walls of the moving grooves (102) through bearings. A clamping plate (23) is movably connected to the surfaces of the first lead screws (22). A rubber pad (24) is bonded to the surface of the clamping plate (23) through an adhesive. A patch type pressure sensor (25) is fixedly connected to the surface of the clamping plate (23). Infrared rangefinders (26) are fixedly connected to the front and rear ends of the surface of the clamping plate (23) and on both sides of the patch type pressure sensor (25). One sides of the patch type pressure sensor (25) and the infrared rangefinders (26) extend to the surface of the rubber pad (24); The front and rear adjustment component (5) includes a connecting plate (51) fixedly connected to the top of the electric push rod (4). A sliding groove (52) is formed in the inner cavity of the connecting plate (51). First limiting grooves (53) are formed on both sides of the inner cavity of the sliding groove (52). A sliding rod (54) is slidably connected to the inner cavity of the sliding groove (52). First limiting blocks (55) are fixedly connected to both sides of the sliding rod (54). The other side of the first limiting block (55) extends into the inner cavity of the first limiting groove (53). A jack (56) is formed in the top of the connecting plate (51). A fastening block (57) is arranged in the inner cavity of the jack (56). A moving plate (58) is fixedly connected to the top of the fastening block (57). A second lead screw (59) is threadedly connected to the center of the moving plate (58). The bottom of the second lead screw (59) is fixedly connected to the top of the connecting plate (51) through a bearing; The fine adjustment component (6) includes an installation box (61) fixedly connected to the surface of the sliding rod (54). A third lead screw (62) is threadedly connected to the center of the top of the installation box (61). A pressing and fixing plate (63) is fixedly connected to the bottom of the third lead screw (62) through a bearing. A fastening rod (64) is slidably connected to the inner cavity of the pressing and fixing plate (63). A spring (65) is sleeved on the surface of the fastening rod (64). The top of the spring (65) is fixedly connected to the bottom of the pressing and fixing plate (63). The bottom of the spring (65) is fixedly connected to a slider (66). An installation hole (67) is formed in the top of the slider (66). The bottom of the fastening rod (64) extends into the inner cavity of the installation hole (67). A sliding hole (68) is formed in the inner cavity of the slider (66). A sliding rod (69) is slidably connected to the inner cavity of the sliding hole (68). Both ends of the sliding rod (69) are fixedly connected to the inner wall of the installation box (61). A plug post (610) is fixedly connected to the bottom of the slider (66). The bottom of the plug post (610) penetrates through the bottom of the installation box (61).

2. The sectional calibration device based on a low-voltage intelligent switch according to claim 1, characterized in that: A handle is fixedly connected to the surface of the box door, and maintenance and adjustment tools are placed in the inner cavity of the toolbox (103).

3. The segmented calibration device based on a low-voltage intelligent switch according to claim 1, characterized in that: External threads are formed on the surface of the first lead screw (22), and the threads on the surfaces of the two first lead screws (22) are designed in reverse. A threaded moving block is fixedly connected to the bottom of the clamping plate (23). The threaded moving block is slidably connected to the inner cavity of the moving groove (102), and a first threaded hole for cooperating with the first lead screw (22) is formed in the inner cavity of the threaded moving block.

4. The segmented calibration device based on a low-voltage intelligent switch according to claim 3, characterized in that: Limit rods (27) are fixedly connected to the bottoms on both sides of the double-output shaft motor (21). The other ends of the limit rods (27) penetrate through the threaded moving block and are fixedly connected to the inner wall of the moving groove (102).

5. A segmented calibration device based on a low-voltage intelligent switch according to claim 1, characterized in that: Installation grooves for installing the patch type pressure sensor (25) and the infrared distance measuring instrument (26) are formed on the surface of the clamping plate (23). Through holes for passing the patch type pressure sensor (25) and the infrared distance measuring instrument (26) are formed on the surface of the rubber pad (24).

6. The segmented calibration device based on a low-voltage intelligent switch according to claim 1, wherein: The jack (56) and the sliding groove (52) are communicated, and the bottom of the fastening block (57) is designed in an arc shape and is used in cooperation with the cylindrical sliding rod (54).

7. A segmented calibration device based on a low-voltage intelligent switch according to claim 1, characterized in that: A second threaded hole is provided at the axis center of the moving plate (58), and the second threaded hole is used in cooperation with the second lead screw (59). The top of the second lead screw (59) is fixedly connected with a first handwheel.

8. A segmented calibration device based on a low-voltage intelligent switch according to claim 1, characterized in that: A third threaded hole is provided at the top of the installation box (61), and the third threaded hole is used in cooperation with the third lead screw (62). The top of the third lead screw (62) is fixedly connected with a second handwheel.

9. A segmented calibration device based on a low-voltage intelligent switch according to claim 1, characterized in that: Moving grooves for the movement of the fastening rod (64) and the insertion post (610) are respectively provided in the inner cavity of the downward pressing and fixing plate (63) and at the bottom of the installation box (61). Second limiting grooves (611) are respectively provided on both sides of the inner cavity of the jack (56). A second limiting block (612) is slidably connected in the inner cavity of the second limiting groove (611). The other side of the second limiting block (612) is fixedly connected to the surface of the fastening rod (64). The bottom of the fastening rod (64) is designed in an arc shape and is used in cooperation with the cylindrical sliding rod (69).

10. A detection method for a segmented calibration device based on a low-voltage intelligent switch according to any one of claims 1-9, characterized in that: It includes the following steps: S1. First, place the residual current operated circuit breaker (3) that needs to be segmented and calibrated and detected between the two clamping plates (23). Then, by starting the double-output shaft motor (21), the double-output shaft motor (21) drives the first lead screw (22) to rotate. The first lead screw (22) drives the clamping plate (23) to move through the threaded moving block. The clamping plate (23) drives the patch type pressure sensor (25) and the infrared rangefinder (26) to move. After the distance detected by the infrared rangefinder (26) is zero and the pressure detected by the patch type pressure sensor (25) meets the standard value, it indicates that the clamping and fixing work is completed at this time. S2. Then, the electric push rod (4) contracts to drive the connecting plate (51) to move downward, which can drive the front and rear adjustment assembly (5) and the fine adjustment assembly (6) to move downward. After adjusting to a suitable position, by rotating the first handwheel, the first handwheel drives the second lead screw (59) to rotate. The second lead screw (59) drives the moving plate (58) to move. The moving plate (58) drives the fastening block (57) to move, so as to release the locking state with the sliding rod (54). Then, the two fine adjustment assemblies (6) can be stretched back and forth. After adjusting the front and rear distances of the fine adjustment assemblies (6), reverse the first handwheel to lock and fix the sliding rod (54) again, so as to fix the positions of the front and rear two fine adjustment assemblies (6). S3. Then, drive the slider (66) to slide on the surface of the sliding rod (69) by toggling the plug post (610). When the plug post (610) corresponds to the wiring ports on the surface of the residual current operated circuit breaker (3) one by one, at this time, rotate the second handwheel to drive the third lead screw (62) to rotate. The third lead screw (62) drives the downward pressure fixing plate (63) to move downward. The downward pressure fixing plate (63) squeezes the fastening rod (64) to move downward. When the bottom of the fastening rod (64) squeezes the locking sliding rod (69), the slider (66) can be fixed at the current position. At this time, adjust the position of the plug post (610), and then drive the plug post (610) to insert into the wiring ports on the surface of the residual current operated circuit breaker (3) by the continuous contraction of the electric push rod (4), and the power-on work of the circuit can be completed. Then, the sectional calibration and detection work can be carried out on other residual current operated circuit breakers (3) of the same model in batches; S4. During the sectional calibration and detection: a. First, carry out the residual current protection calibration. Through the intelligent control and communication module built in the residual current operated circuit breaker (3), set the residual operating current threshold, and combine with the microprocessor high-speed sampling and operation module to calibrate the detection accuracy. Then, connect the leakage current simulator (12), gradually increase the leakage current to the set value, observe the action of the tripping actuator. After the residual current detection coil senses the leakage current, it generates an electrical signal to trigger the release, driving the arc extinguishing chamber contacts to break. If the breaking time exceeds the specified time, finely adjust the tension of the release spring (65) and optimize the sensitivity of the detection coil, and repeat the test until it meets the standard; b. Then, carry out the overload protection calibration. According to the rated current of the switch, set 1.1 times the overload current through the adjustable resistor (10), connect the load, monitor the time. The bimetallic sheet of the thermal magnetic release bends due to the current heating, pushing the tripping mechanism to break the contacts, and the arc extinguishing chamber starts to extinguish the arc. Record the breaking time. If the tripping time is abnormal, adjust the distance between the bimetallic sheet and the heating element, and calibrate the current sampling threshold until the protection characteristics are met; c. Then, carry out the short-circuit protection calibration. Use the short-circuit test generator (7) to output a short-circuit current of 5 - 10 times the rated current. The electromagnetic release instantaneously generates a strong magnetic field, driving the armature to impact the tripping mechanism, and the contacts break quickly. The arc extinguishing chamber extinguishes the arc through the three-dimensional grid. Use the oscilloscope inside the control computer (14) to record the breaking time. If the breaking is delayed, adjust the air gap size of the electromagnetic release to improve the tripping sensitivity; d. Finally, when the single-item calibration is completed, simulate a comprehensive fault (such as overload + leakage) to verify the cooperation between the protection functions and the structure. When the residual current detection triggers tripping, the arc extinguishing chamber breaks normally; After overload tripping, the short-circuit protection can still respond. Record the full-process data through the control computer (14) to ensure the reliability and stability of the low-voltage switch after sectional calibration.

Images