A circuit breaker trip assembly instantaneous delay characteristic verification device and verification method

Abstract

The present invention discloses a circuit breaker trip assembly instantaneous delay characteristic verification device and verification method, including a frame, a tripper verification tool and a controller, a verification station is provided on the frame, a first power-on component and a second power-on component are respectively provided at both ends of the verification station, a moving track is provided on the verification station, and the tripper verification tool is movably connected to the moving track; a copper bar and a handle mechanism are provided on the tripper verification tool, one end of the copper bar is narrowed to form a sleeve part for loading the tripping component, the other end of the copper bar is a loading part, a current supplement component is provided on one side of the first power-on component, when the tripping component is verified, the first power-on component is electrically connected to the sleeve part through the current supplement component, the second power-on component is electrically connected to the loading part, and the handle mechanism is linked to the tripping component. The present invention improves the verification efficiency of the instantaneous delay characteristic of the tripping component, reduces the unnecessary wear of the circuit breaker before leaving the factory, and helps to extend the overall service life of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker calibration, and in particular to a circuit breaker trip assembly instantaneous delay characteristic calibration device and a calibration method. Background Art

[0002] Circuit breakers are extremely important electrical equipment in the field of power distribution. They are switch devices that can automatically cut off the circuit when a specific fault occurs. The core component of the circuit breaker that can automatically cut off the circuit is the release. When short-circuit current and overload current appear in the circuit, it can accurately act according to the predetermined time and current characteristics, thereby protecting the circuit and equipment from damage. This is the instantaneous delay characteristic of the release.

[0003] Before the circuit breaker leaves the factory, the instantaneous delay characteristic needs to be checked. The existing instantaneous delay characteristic test of the circuit breaker usually places the entire circuit breaker on a test bench. For example, the Chinese patent with the publication number CN207730904U discloses a circuit breaker instantaneous characteristic detection device, which installs the circuit breaker on the corresponding workstation for characteristic detection. This detection device is feasible for small-sized products such as molded case circuit breakers, but for large switches such as frame circuit breakers, it is necessary to carry and replace each circuit breaker to check the instantaneous delay characteristic of the whole machine. In particular, the delay characteristic verification requires a long waiting time, resulting in extremely low efficiency of the instantaneous delay characteristic verification; not only that, directly placing the switch on the verification fixture for testing is likely to damage the coating on the copper busbar of the circuit breaker, and the circuit breaker that has been checked for the instantaneous delay characteristic is bound to be disconnected multiple times during the verification process, causing the circuit breaker to extinguish the arc before leaving the factory, affecting the life of the internal moving and static contacts.

[0004] Therefore, it is urgent to design a circuit breaker trip assembly instantaneous delay characteristic calibration device and calibration method to improve the efficiency and accuracy of large circuit breaker switch instantaneous delay characteristic calibration. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a circuit breaker trip assembly instantaneous delay characteristic calibration device and a calibration method.

[0006] In a first aspect of the present invention, a circuit breaker trip assembly instantaneous delay characteristic verification device is provided, comprising a frame, a tripper verification fixture and a controller, wherein the frame is provided with a verification station, and two ends of the verification station are respectively provided with a first power-on component and a second power-on component movably connected to the frame, and the verification station is provided with a movable track, and the tripper verification fixture is movably connected to the movable track; the tripper verification fixture is provided with a copper bar and a handle mechanism, one end of the copper bar is narrowed to form a sleeve portion for loading the tripping assembly, and the other end of the copper bar is a loading portion, and a current supplement component is provided on one side of the first power-on component, and when the tripping assembly is verified, the first power-on component is electrically connected to the sleeve portion through the current supplement component, the second power-on component is electrically connected to the loading portion, and the handle mechanism is linked to the tripping assembly.

[0007] In a second aspect of the present invention, a method for verifying the instantaneous delay characteristics of a circuit breaker trip assembly is provided, using the above-mentioned circuit breaker trip assembly instantaneous delay characteristics verification device, comprising:

[0008] Obtain electrical parameter information of the tripping component to be tested, and generate an instantaneous characteristic test case and a delayed characteristic test case according to the electrical parameter information of the tripping component; the instantaneous characteristic test case includes applying a short-circuit test current and an instantaneous tripping qualified time, and the delayed characteristic test case includes applying an overload test current and a delayed tripping qualified time;

[0009] Sleeve the trip assembly on the sleeve part of the copper bar, connect the trip assembly to the handle bracket, operate the handle assembly to put the handle mechanism in the closed state, at this time, the handle assembly is linked to the trip part of the trip assembly;

[0010] Get the test start instruction, control the tooling push cylinder to work, push the releaser verification tooling to the verification station, and when the tooling position sensor detects that the releaser verification tooling is in place, control the first crimping cylinder and the second crimping cylinder to work, and the first power-carrying component and the second power-carrying component move toward the releaser verification tooling, and the first crimping portion of the first power-carrying conductor crimps the sleeve portion onto the current-carrying bar, so that the current-carrying bar and the current-carrying block constitute a current-compensating conductor connected between the sleeve portion and the first crimping portion;

[0011] According to the transient characteristic test example, a short-circuit test current is applied to the copper busbar on the trip unit verification fixture. The trip unit detects the short-circuit test current to activate the trip unit, driving the handle unit to switch from the closed state to the open state. The instantaneous trip test time from the moment of applying the short-circuit test current to the moment of switching the handle unit state is recorded by the handle position sensor;

[0012] Operate the handle assembly again to put the handle mechanism in the closed state, apply the overload test current to the copper busbar on the trip unit verification fixture according to the delay characteristic test example, the trip assembly detects the overload test current to activate the trip unit, and drives the handle assembly to switch from the closed state to the open state. The delay trip test time from the moment the overload test current is applied to the moment the handle assembly state is switched is recorded through the handle position sensor; repeat the delay characteristic test until all overload test currents in the delay characteristic test example are completed;

[0013] Whether the instantaneous characteristic of the tripping component is qualified is judged according to the instantaneous tripping test time and the instantaneous tripping qualified time; whether the delayed characteristic of the tripping component is qualified is judged according to the delayed tripping test time and the delayed tripping qualified time.

[0014] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0015] The circuit breaker trip assembly instantaneous delay characteristic verification device of the present invention can realize independent verification of the instantaneous delay characteristic of the trip assembly, which means that for large circuit breakers such as frame-type circuit breakers, there is no need to transport and replace the entire circuit breaker, and only the trip assembly needs to be replaced or adjusted. This greatly shortens the preparation time before verification, improves the verification efficiency, and reduces unnecessary wear of the circuit breaker before leaving the factory, especially reduces the number of disconnections of the moving and static contacts, which helps to extend the overall service life of the circuit breaker.

[0016] The present invention avoids the damage that may be caused by directly performing calibration on the circuit breaker through a specially designed release calibration tool, especially avoids damage to the copper busbar plating, which not only protects the appearance quality of the circuit breaker, but also ensures the integrity of its electrical performance; and the release calibration tool adopts a straight-through copper busbar to avoid calibration errors caused by wear of the moving and static contacts due to repeated calibration, and the tool without breakpoints is safer and more stable during calibration.

[0017] The movable track, the movable first energized component, the movable second energized component and the tripper verification tool on the device of the present invention make the verification process more flexible and can adapt to tripping components of different models and specifications. This design increases the versatility and applicability of the device; and in order to better simulate the actual situation of the circuit breaker conductive system, a current compensation component is arranged on the first energized component for real simulation, thereby improving the accuracy of the verification of the instantaneous delay characteristics of the tripping component.

[0018] The present invention performs automatic verification of the tripping component through a controller and manual instructions in the verification method, thereby improving the intelligence level of the instantaneous delay characteristic verification of the circuit breaker tripping component. In particular, during the delay characteristic test, the three-phase copper busbar temperature signal is obtained and processed in real time, which effectively avoids overheating and abnormal data elimination caused by unsuccessful current supplementation, ensures the accuracy and reliability of the verification result, and improves the verification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of a trip assembly according to an embodiment of the present invention.

[0020] Figure 2 This is a stereoscopic diagram of the trip assembly verification device according to an embodiment of the present invention when it is in a non-detection state.

[0021] Figure 3 This is a stereoscopic diagram of a trip assembly verification device in an undetected state loaded with a trip assembly according to an embodiment of the present invention.

[0022] Figure 4 It is a stereoscopic diagram of the trip assembly verification device according to an embodiment of the present invention when it is in a detection state.

[0023] Figure 5 It is an exploded view of the release inspection tooling according to an embodiment of the present invention.

[0024] Figure 6 The present invention is a three-dimensional diagram of a trip assembly and a tripper verification tool.

[0025] Figure 7 It is a three-dimensional diagram of the release inspection tooling according to an embodiment of the present invention.

[0026] Figure 8 It is a three-dimensional diagram of a frame according to an embodiment of the present invention.

[0027] Fig. 9 This is a stereoscopic view of another trip assembly verification device in an undetected state loaded with a trip assembly according to an embodiment of the present invention.

[0028] Fig.10 It is a schematic diagram of electrical control of a trip assembly verification device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] Combined with Figure 2 To Attachment Fig.10 The technical solution of the present invention is a circuit breaker trip assembly instantaneous delay characteristic verification device, comprising a frame 1, a tripper verification tool 2 and a controller 3, wherein the frame 1 is provided with a verification station 11, and the two ends of the verification station 11 are respectively provided with a first power-on component 4 and a second power-on component 5 movably connected to the frame 1, and the verification station 11 is provided with a movable track 12, and the tripper verification tool 2 is movably connected to the movable track 12; the tripper verification tool 2 is provided with a copper bar 21 and a handle mechanism 22, one end of the copper bar 21 is narrowed to form a sleeve portion 211 for loading the tripping component 7, and the other end of the copper bar 21 is a loading portion 212, and a current supplement component 6 is provided on one side of the first power-on component 4. When the tripping component 7 is verified, the first power-on component 4 is electrically connected to the sleeve portion 211 through the current supplement component 6, and the second power-on component 5 is electrically connected to the loading portion 212, and the handle mechanism 22 is linked to the tripping component 7.

[0032] As attached Figure 1 As shown, the trip assembly 7 to be detected by the circuit breaker trip assembly instantaneous delay characteristic verification device of the present invention is a trip assembly, and the trip assembly 7 is provided with a penetration hole 71, and the penetration hole 71 is used to sleeve the trip assembly 7 on the sleeve portion 211 of the copper bus 21; the trip assembly 7 also includes a trip portion 72 and a functional part, and the functional part is provided with a rotating shaft 73, the trip portion 72 is used to be linked with the handle mechanism 22, and the rotating shaft 73 is used to be connected with the handle bracket 221 of the handle mechanism 22.

[0033] In this embodiment, the controller 3 is a programmable logic controller (PLC) or a single chip microcomputer (MCU).

[0034] In this embodiment, in order to facilitate the replacement of the trip assembly 7, one end of the copper bar 21 on the tripper verification fixture 2 is narrowed, but the trip assembly 7 can truly simulate its tripping performance on the circuit breaker during verification, and a current supplement structure is set between the first power-on assembly 4 and the sleeve 211, so that the trip assembly 7 can be verified on an equivalent electrical conductive system for instantaneous delay characteristics. The movable track 12 and the movable first power-on assembly 4, the second power-on assembly 5 and the tripper verification fixture 2 on the device of the present invention make the verification process more flexible and can adapt to trip assemblies of different models and specifications. This design increases the versatility and scope of application of the device; and in order to better simulate the actual situation of the circuit breaker conductive system, a current supplement assembly 6 is set on the first power-on assembly 4 for real simulation, thereby improving the accuracy of the verification of the instantaneous delay characteristics of the trip assembly 7.

[0035] The present invention avoids the damage that may be caused by directly performing calibration on the circuit breaker through the specially designed release calibration tool 2, especially avoids damage to the plating layer of the copper bus 21, which not only protects the appearance quality of the circuit breaker, but also ensures the integrity of its electrical performance; and the release calibration tool 2 adopts a straight-through copper bus 21 to avoid calibration errors caused by wear of the moving and static contacts due to repeated calibration, and the tool without breakpoints is safer and more stable during calibration.

[0036] In this embodiment, the first power-carrying component 4 and the second power-carrying component 5 are both provided with an insulating layer on the outside to prevent accidental contact by people.

[0037] In this embodiment, the current supplement component 6 includes a fixed substrate 61 and a movable substrate 62, the movable substrate 62 is connected to the first power-on component 4, and a current-carrying block 63 is provided on the side of the movable substrate 62 close to the calibration station 11; the first power-on component 4 includes a plurality of first power-carrying conductors arranged at intervals, the first power-carrying conductors include a first penetration portion 41 and a first crimping portion 42, the first penetration portion 41 is movably connected to the frame 1, and the end surfaces of the first crimping portion 42 are electrically connected to the current-carrying blocks 63, and the two sides are A accommodating cavity 64 is provided between the current-carrying blocks 63, the fixed base plate 61 is connected to the frame 1, and a current-carrying bar 65 is provided on the fixed base plate 61 at a position directly opposite to the first crimping portion 42; when the releaser verification tool 2 moves to the verification station 11 to verify the release assembly 7, the end of the sleeve portion 211 is located in the accommodating cavity 64, and the ends of the sleeve portion 211 are electrically connected to the first crimping portion 42 and the current-carrying bar 65, respectively, and the current-carrying blocks 63 are electrically connected to the current-carrying bars 65, respectively.

[0038] In this embodiment, a mounting groove is provided on the movable base plate 62 at a position facing the accommodating cavity 64, and a temperature measuring probe 621 is provided in the mounting groove. When the trip assembly 7 is calibrated, the temperature measuring probe 621 faces the sleeve portion 211, and the signal output end of the temperature measuring probe 621 is connected to the input end of the controller 3.

[0039] In this embodiment, the second power-carrying component 5 includes a plurality of second power-carrying conductors arranged at intervals, and the second power-carrying conductors include a second insertion portion 51 and a second crimping portion 52. The second insertion portion 51 is movably connected to the frame 1. When the releaser verification tool 2 moves to the verification station 11 to verify the release component 7, the second crimping portion 52 is electrically connected to the loading portion 212.

[0040] In this embodiment, the number of the first power conductors is three, and the number of the second power conductors is also three.

[0041] In this embodiment, the handle mechanism 22 includes a handle bracket 221 and a handle assembly 222 movably connected to the handle bracket 221, and a handle position sensor 223 is provided on the handle bracket 221. The handle position sensor 223 is opposite to the handle assembly 222 and is used to detect the opening and closing state of the handle assembly 222. The signal output end of the handle position sensor 223 is connected to the input end of the controller 3; when the releaser verification tool 2 moves to the verification station 11 to verify the release assembly 7, the release assembly 7 is linked to the handle assembly 222.

[0042] In this embodiment, the releaser verification tool 2 includes a base plate 23 and a loading plate 24 connected to the base plate 23, a roller 25 is provided on the side of the base plate 23 close to the frame 1, and the base plate 23 is movably connected to the movable track 12 through the roller 25; a reset spring 26 is provided between the base plate 23 and the loading plate 24, and when the releaser verification tool 2 moves to the verification station 11 to verify the release component 7, the first power-on component 4 and the second power-on component 5 are respectively pressed on both ends of the copper bus 21 to compress the reset spring 26; the above structure prevents the releaser verification tool 2 from mechanically wearing the current-carrying bus 65 during the process of moving to the verification station 11, thereby ensuring the service life of the conductive system of the verification equipment.

[0043] In this embodiment, a limit block 13 is provided on one side of the verification station 11, and the limit block 13 is located on the moving path of the base plate 23 of the moving track 12. A tool position sensor 14 is provided on the limit block 13, and the tool position sensor 14 is facing the verification station 11. The signal output end of the tool position sensor 14 is connected to the input end of the controller 3; the limit block 13 is used for the releaser verification tool 2 to quickly move to the verification station 11.

[0044] In this embodiment, it also includes a tool pushing cylinder 27, a first crimping cylinder 43, a second crimping cylinder 53, a control button 31 and a display terminal 32. The tool pushing cylinder 27 is connected to the releaser verification tool 2, the first crimping cylinder 43 is connected to the first energizing component 4, and the second crimping cylinder 53 is connected to the second energizing component 5; the signal output end of the controller 3 is respectively connected to the tool pushing cylinder 27, the first crimping cylinder 43, the second crimping cylinder 53 and the input end of the display terminal 32, and the signal output end of the control button 31 is connected to the signal input end of the controller 3; the control button 31 is used for the detection personnel to send corresponding instructions, and the display terminal 32 is used to display the verification results and alarm display of the release component 7.

[0045] In this embodiment, the tooling position sensor 14, the tooling pushing cylinder 27, the first crimping cylinder 43, the second crimping cylinder 53, the control button 31 and the display terminal 32 are not shown on the structural drawing, but do not affect the verification of the present technical solution.

[0046] The circuit breaker trip assembly instantaneous delay characteristic verification device of this embodiment can realize independent verification of the instantaneous delay characteristic of the trip assembly, which means that for large circuit breakers such as frame-type circuit breakers, there is no need to transport and replace the entire circuit breaker, and only the trip assembly needs to be replaced or adjusted. This greatly shortens the preparation time before verification, improves the verification efficiency, and reduces unnecessary wear of the circuit breaker before leaving the factory, especially reduces the number of disconnections of the moving and static contacts, which helps to extend the overall service life of the circuit breaker.

[0047] Example 2

[0048] Combined with Figure 1 To Attachment Fig.10 The technical solution of the present invention is a method for verifying the instantaneous delay characteristics of a circuit breaker tripping component, using the circuit breaker tripping component instantaneous delay characteristics verification device described in Example 1, comprising:

[0049] Obtain the electrical parameter information of the tripping component 7 to be tested, and generate an instantaneous characteristic test case and a delay characteristic test case according to the electrical parameter information of the tripping component 7; the instantaneous characteristic test case includes applying a short-circuit test current I sc and instantaneous tripping qualified time t Ir0 The delay characteristic test example includes applying an overload test current I oc and delayed tripping qualified time t Dr0 ;

[0050] The trip assembly 7 is sleeved on the sleeve portion 211 of the copper bar, and the trip assembly 7 is connected to the handle bracket 221, and the handle assembly 222 is operated to put the handle mechanism 22 in a closed state, at which time the handle assembly 222 is linked to the trip portion 72 of the trip assembly 7;

[0051] Get the test start instruction, control the tooling push cylinder 27 to work, push the releaser verification tooling 2 to the verification station 11, when the tooling position sensor 14 detects that the releaser verification tooling 2 is in place, control the first crimping cylinder 43 and the second crimping cylinder 53 to work, the first power-carrying component 4 and the second power-carrying component 5 move toward the releaser verification tooling 2, and the first crimping portion 42 of the first power-carrying conductor crimps the sleeve portion 211 onto the current-carrying bar 65, so that the current-carrying bar 65 and the current-carrying block 63 constitute a current-compensating conductor connected between the sleeve portion 211 and the first crimping portion 42;

[0052] According to the transient characteristic test example, a short-circuit test current I is applied to the copper busbar on the trip unit verification tooling.sc , the trip component 7 detects the short-circuit test current I sc The tripping unit 72 is activated to drive the handle assembly 222 to switch from the closed state to the open state, and the handle position sensor 223 records the current I from the applied short-circuit test current I sc The instantaneous tripping test time t from the moment when the handle assembly 222 switches state Irt ;

[0053] Operate the handle assembly 222 again to put the handle mechanism 22 in the closed state, and apply an overload test current I to the copper busbar on the trip unit verification fixture according to the delay characteristic test example. oc , the tripping component 7 detects the overload test current I oc The tripping unit 72 is activated to drive the handle assembly 222 to switch from the closed state to the open state, and the handle position sensor 223 records the current I from the applied overload test current I oc The time delay tripping test time t from the moment to the moment when the handle assembly 222 switches state Drt ; Repeat the delay characteristic test until all overload test currents in the delay characteristic test case are completed;

[0054] According to the instantaneous tripping test time t Irt and instantaneous tripping qualified time t Ir0 , judge whether the instantaneous characteristics of the tripping component 7 are qualified; according to the delayed tripping test time t Drt and delayed tripping qualified time t Dr0 , determine whether the delay characteristics of the trip component 7 are qualified.

[0055] In this embodiment, the delay characteristic test example includes at least one equivalent overload current and a corresponding delay tripping qualified time verification scheme, which is specifically adjusted according to the requirements of the circuit breaker to which the trip assembly 7 is to be installed.

[0056] In this embodiment, the delay characteristic test case of the trip assembly 7 is relatively slow, and the inspection personnel can leave after executing the corresponding command or action, thereby reducing the workload of the personnel, and the display terminal 32 is used to remind after the inspection is completed.

[0057] In this embodiment, when the delay characteristic test is performed, the temperature signal of the sheathing portion 211 of the three-phase copper busbar detected by the temperature measuring probe 621 is obtained in real time from the moment when the overload test current is applied to the copper busbar on the trip unit verification fixture 2;

[0058] If the highest temperature of any phase of the three-phase copper busbar exceeds the warning temperature Tw, it is determined that the current compensation conductor of the sleeve portion 211 of the current busbar 21 is not connected to the circuit, the current delay characteristic test is terminated, and a current compensation failure alarm is issued;

[0059] If the highest temperature of each phase of the three-phase copper bar does not exceed the warning temperature Tw, in the preset temperature change range [T1,T n ], where n is a natural number greater than 5, the temperature signal of the three-phase copper busbar is extracted according to the preset sampling frequency to obtain the temperature sampling point P of the copper busbar of phase A A {(T1,ta1),(T2,ta2)...(T n ,ta n )}, get the B phase copper bar temperature sampling point P B {(T1,tb1),(T2,tb2)...(T n ,tb n )}, get the temperature sampling point P of the copper bar of phase C C {(T1,tc1),(T2,tc2)...(T n ,tc n )}, where ta is the sampling time, and ta, tb and tc are all temperature sampling times; compare the temperature rise time difference rate of each phase copper busbar temperature in the temperature change sub-interval; if the temperature rise time difference rate of any phase copper busbar is greater than the preset difference rate, it is judged that the current compensation conductor of the current copper busbar sleeve is not connected to the loop, the current delay characteristic test is ended, and an alarm of unsuccessful current compensation is issued; if the temperature rise time difference rate of each phase copper busbar is not greater than the preset difference rate, the delayed tripping test time obtained by the current delay characteristic test is used as the basis for judging whether the delay characteristic of the tripping component is qualified.

[0060] In this embodiment, the warning temperature Tw is set to determine whether each copper busbar 21 has obvious abnormal heating. When the temperature of each copper busbar 21 is lower than the warning temperature Tw, the difference rate of the temperature rise time of each copper busbar 21 in multiple same temperature sub-intervals is compared to determine whether the current replenishment is unsuccessful.

[0061] In this embodiment, the preset difference rate is determined according to the value of n.

[0062] In this embodiment, the temperature rise time difference rate of the copper bar temperature of each phase in the temperature change sub-interval is compared, for example: the temperature rise time difference rate of the copper bar temperature of phase A, the copper bar temperature of phase B and the copper bar temperature of phase C in the temperature change sub-interval [T1, T2] is compared, and the temperature rise time difference rate Dr_AB of phase A-phase B, the temperature rise time difference rate Dr_BC of phase B-phase C, and the temperature rise time difference rate Dr_CA of phase C-phase A are calculated. If any one of the temperature rise time difference rate Dr_AB, the temperature rise time difference rate Dr_BC and the temperature rise time difference rate Dr_CA exceeds the preset difference rate, the current delay characteristic test is stopped, indicating that the compensation current conductor of the current copper bar sheathing part is not connected to the loop to form a compensation current structure, or the compensation current conductor of the current copper bar sheathing part is disconnected and cannot form a stably connected compensation current structure.

[0063] The technical solution of the present invention performs automatic verification of the tripping component through a controller and manual instructions in the verification method, thereby improving the intelligence level of the instantaneous delay characteristic verification of the circuit breaker tripping component. In particular, during the delay characteristic test, the three-phase copper busbar temperature signal is obtained and processed in real time, which effectively avoids overheating and abnormal data elimination caused by unsuccessful current supplementation, ensures the accuracy and reliability of the verification results, and improves the verification efficiency.

[0064] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0065] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circuit breaker trip assembly instantaneous delay characteristic verification device, characterized in that: It comprises a frame, a tripper inspection tool and a controller, wherein the frame is provided with an inspection station, and the two ends of the inspection station are respectively provided with a first power-on component and a second power-on component movably connected to the frame, and the inspection station is provided with a movable track, and the tripper inspection tool is movably connected to the movable track; the tripper inspection tool is provided with a copper bar and a handle mechanism, one end of the copper bar is narrowed to form a sleeve part for loading the tripping component, and the other end of the copper bar is a loading part, and a current supplement component is provided on one side of the first power-on component, and when the tripping component is inspected, the first power-on component is electrically connected to the sleeve part through the current supplement component, and the second power-on component is electrically connected to the loading part, and the handle mechanism is linked to the tripping component; The current supplement component includes a fixed substrate and a movable substrate, the movable substrate is connected to the first power-carrying component, and a current-carrying block is provided on the side of the movable substrate close to the verification station; the first power-carrying component includes a plurality of first power-carrying conductors arranged at intervals, the first power-carrying conductor includes a first penetration portion and a first crimping portion, the first penetration portion is movably connected to the frame, the end surfaces of the first crimping portion are electrically connected to the current-carrying blocks on both sides, and an accommodating cavity is provided between the current-carrying blocks on both sides, the fixed substrate is connected to the frame, and a current-carrying bar is provided on the fixed substrate opposite to the first crimping portion; when the releaser verification tool moves to the verification station to verify the release component, the end of the sleeve portion is located in the accommodating cavity, the end of the sleeve portion is electrically connected to the first crimping portion and the current-carrying bar respectively, and the current-carrying block is electrically connected to the current-carrying bar respectively.

2. A circuit breaker trip assembly instantaneous delay characteristic verification device according to claim 1, characterized in that: A mounting groove is provided on the movable base plate at a position facing the accommodating cavity, and a temperature measuring probe is provided in the mounting groove. When the trip assembly is calibrated, the temperature measuring probe faces the sleeve portion, and a signal output end of the temperature measuring probe is connected to an input end of the controller.

3. The circuit breaker trip assembly instantaneous delay characteristic verification device according to claim 1, characterized in that: The second power-carrying component includes a plurality of second power-carrying conductors arranged at intervals, the second power-carrying conductors include a second penetration portion and a second crimping portion, the second penetration portion is movably connected to the frame, and when the releaser verification tool moves to the verification station to verify the release component, the second crimping portion is electrically connected to the loading portion.

4. The circuit breaker trip assembly instantaneous delay characteristic verification device according to claim 1, characterized in that: The handle mechanism includes a handle bracket and a handle assembly movably connected to the handle bracket, a handle position sensor is provided on the handle bracket, the handle position sensor is directly opposite to the handle assembly and is used to detect the opening and closing state of the handle assembly, and the signal output end of the handle position sensor is connected to the input end of the controller; when the release device verification tool moves to the verification station to verify the release assembly, the release assembly is linked to the handle assembly.

5. The circuit breaker trip assembly instantaneous delay characteristic verification device according to claim 1, characterized in that: The releaser verification tooling includes a base plate and a loading plate connected to the base plate, a roller is provided on the side of the base plate close to the frame, and the base plate is movably connected to the movable track through the roller; a reset spring is provided between the base plate and the loading plate, and when the releaser verification tooling moves to the verification station to verify the release assembly, the first power-on assembly and the second power-on assembly are respectively pressed onto the two ends of the copper busbar to compress the reset spring.

6. A circuit breaker trip assembly instantaneous delay characteristic verification device according to claim 5, characterized in that: A limit block is provided on one side of the verification station, and the limit block is located on the moving path of the base plate on the moving track. A tooling position sensor is provided on the limit block, and the tooling position sensor is facing the verification station. The signal output end of the tooling position sensor is connected to the input end of the controller.

7. A circuit breaker trip assembly instantaneous delay characteristic verification device according to any one of claims 1 to 6, characterized in that: It also includes a tooling pushing cylinder, a first crimping cylinder, a second crimping cylinder, a control button and a display terminal. The tooling pushing cylinder is connected to the releaser verification tooling, the first crimping cylinder is connected to the first energizing component, and the second crimping cylinder is connected to the second energizing component; the signal output end of the controller is respectively connected to the tooling pushing cylinder, the first crimping cylinder, the second crimping cylinder and the input end of the display terminal, and the signal output end of the control button is connected to the signal input end of the controller.

8. A method for verifying the instantaneous delay characteristics of a circuit breaker trip assembly, characterized in that: The circuit breaker trip assembly instantaneous delay characteristic verification device according to any one of claims 1 to 7 comprises: Obtain electrical parameter information of the tripping component to be tested, and generate an instantaneous characteristic test case and a delayed characteristic test case according to the electrical parameter information of the tripping component; the instantaneous characteristic test case includes applying a short-circuit test current and an instantaneous tripping qualified time, and the delayed characteristic test case includes applying an overload test current and a delayed tripping qualified time; Sleeve the trip assembly on the sleeve part of the copper bar, connect the trip assembly to the handle bracket, operate the handle assembly to put the handle mechanism in the closed state, at this time, the handle assembly is linked to the trip part of the trip assembly; Get the test start instruction, control the tooling push cylinder to work, push the releaser verification tooling to the verification station, and when the tooling position sensor detects that the releaser verification tooling is in place, control the first crimping cylinder and the second crimping cylinder to work, and the first power-carrying component and the second power-carrying component move toward the releaser verification tooling, and the first crimping portion of the first power-carrying conductor crimps the sleeve portion onto the current-carrying bar, so that the current-carrying bar and the current-carrying block constitute a current-compensating conductor connected between the sleeve portion and the first crimping portion; According to the transient characteristic test example, a short-circuit test current is applied to the copper busbar on the trip unit verification fixture. The trip unit detects the short-circuit test current to activate the trip unit, driving the handle unit to switch from the closed state to the open state. The instantaneous trip test time from the moment of applying the short-circuit test current to the moment of switching the handle unit state is recorded by the handle position sensor; Operate the handle assembly again to put the handle mechanism in the closed state, apply the overload test current to the copper busbar on the trip unit verification fixture according to the delay characteristic test example, the trip assembly detects the overload test current to activate the trip unit, and drives the handle assembly to switch from the closed state to the open state. The delay trip test time from the moment the overload test current is applied to the moment the handle assembly state is switched is recorded through the handle position sensor; repeat the delay characteristic test until all overload test currents in the delay characteristic test example are completed; Whether the instantaneous characteristic of the tripping component is qualified is judged according to the instantaneous tripping test time and the instantaneous tripping qualified time; whether the delayed characteristic of the tripping component is qualified is judged according to the delayed tripping test time and the delayed tripping qualified time.

9. A method for checking instantaneous delay characteristics of a circuit breaker trip assembly according to claim 8, characterized in that: When conducting the time-delay characteristic test, from the moment when the overload test current is applied to the copper busbar on the trip unit verification fixture, the temperature signal of the set part of the three-phase copper busbar detected by the temperature measuring probe is obtained in real time; If the highest temperature of any phase of the three-phase copper busbar exceeds the warning temperature Tw, it is judged that the current compensation conductor of the current busbar is not connected to the circuit, the current delay characteristic test is terminated, and an alarm of unsuccessful current compensation is issued; If the highest temperature of each phase of the three-phase copper bar does not exceed the warning temperature Tw, in the preset temperature change range [T1,T n ], where n is a natural number greater than 5, the temperature signal of the three-phase copper busbar is extracted according to the preset sampling frequency to obtain the temperature sampling point P of the copper busbar of phase A A {(T1,ta1),(T2,ta2)...(T n ,ta n )}, get the B phase copper bar temperature sampling point P B {(T1,tb1),(T2,tb2)...(T n ,tb n )}, get the temperature sampling point P of the copper bar of phase C C {(T1,tc1),(T2,tc2)...(T n ,tc n )}, where ta is the sampling time, and ta, tb and tc are all temperature sampling times; compare the temperature rise time difference rate of each phase copper bar temperature in the temperature change sub-interval; if the temperature rise time difference rate of any phase copper bar is greater than the preset difference rate, it is judged that the current compensation conductor of the sheath part of the current copper bar is not connected to the loop, the current delay characteristic test is terminated, and an alarm of unsuccessful current compensation is issued; If the temperature rise time difference rate of each phase copper busbar is not greater than the preset difference rate, the delayed tripping test time obtained by the current delay characteristic test will be used as the basis for judging whether the delay characteristic of the tripping component is qualified.

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