Short-time withstand current test device

Abstract

The utility model discloses a short-time withstand current test device applied to the technical field of electrical fault detection, and the device can detect whether a contact of a circuit breaker is damaged or not through a damage detection device, also can detect whether the arc spraying phenomenon occurs in the circuit breaker or not, and records the borne maximum current if one of the two conditions occurs, so as to achieve the purpose of testing the short-time withstand current. If the two conditions do not occur, the current is increased, the circuit current continues to be output until the tolerance limit of the circuit breaker is tested, meanwhile, through the peak tolerance test module, the kinetic energy of a load in the circuit can be detected and recorded after the current is output, so that the peak current tolerance capacity of the circuit breaker is obtained, and in addition, a partition plate is matched, so that the reliability of the circuit breaker is improved. The wind plate can be driven to rotate in different directions by using the driving force of gas, so that a worker is helped to know the fault details of the tolerance test after bearing the maximum current in time, and the accuracy of the tolerance test result and the test efficiency are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electric fault detection, in particular to a short-time withstand current test device. BACKGROUND

[0002] The short-time and peak current withstand test is a test that occurs after a short-circuit fault, in which the equipment needs to withstand a short-circuit current for a period of time without causing contact welding, automatic ejection or unallowed displacement and perceptible permanent deformation, giving the time for other circuit breakers in the system to remove the fault, and the equipment can continue to be used normally after the fault is removed. The test can measure the current withstand of the switchgear.

[0003] After the switchgear is connected to the current, the standards for the withstand test are: 1. The contact is not allowed to have deformation phenomenon; 2. The switchgear is not allowed to have arc spraying phenomenon. However, in the process of the conventional short-time and peak current withstand test, the worker can only roughly understand that the switchgear has a fault, but cannot quickly and accurately determine the specific principle of the fault of the switchgear, which affects the accuracy of the worker on the short-time and peak current withstand test result of the switchgear, and also reduces the test efficiency.

[0004] Therefore, the applicant proposes a short-time withstand current test device. SUMMARY

[0005] The application aims to solve the problem that the worker can only roughly understand that the switchgear has a fault, but cannot quickly and accurately determine the specific principle of the fault of the switchgear, which affects the accuracy of the worker on the short-time and peak current withstand test result of the switchgear, and also reduces the test efficiency. Compared with the prior art, the application provides a short-time withstand current test device, which is connected with a current output module and a short-circuit control module, the short-circuit control module is connected with a circuit breaker, the circuit breaker is connected with a short-time withstand test module and a peak withstand test module respectively, the short-time withstand test module comprises a controller, a gas detector and a damage detection device, the controller is connected with the current output module, and the damage detection device is connected with the circuit breaker.

[0006] The damage detection equipment includes a detection housing, a circuit breaker installed inside the detection housing, a metal plate installed inside the detection housing, an arc-extinguishing grid located between the circuit breaker and the metal plate inside the detection housing, an air pipe connecting the metal plate and the circuit breaker, sliding plates connected to the left and right inner walls of the circuit breaker, two rollers rotatably connected between the two sliding plates, two ventilation holes cut into one of the sliding plates, a stationary contact plate installed on the left inner wall of the circuit breaker, a moving contact plate installed in the detection housing between the two rollers, a magnetic sliding plate installed at the right end of the moving contact plate, a connecting spring fixedly connected between the magnetic sliding plate and the circuit breaker, an electromagnet installed inside the circuit breaker that repels the magnetic force of the magnetic sliding plate, a manifold connected to the air pipe, and an alert whistle installed on the manifold.

[0007] This system enables the detection of circuit breaker contacts for damage and arcing using damage detection equipment. If either of these occurs, the maximum current is recorded. If neither occurs, the current is increased, and the circuit current continues to be output until the circuit breaker's withstand limit is determined. Simultaneously, the peak current withstand test module detects and records the load kinetic energy in the circuit after current output, thus determining the circuit breaker's peak current withstand capability. Furthermore, with the addition of a baffle, the air force can be used to rotate the baffle in different directions, helping personnel to more promptly understand the fault details after the withstand test under maximum current load, improving the accuracy and efficiency of the withstand test results.

[0008] Optionally, the peak withstand test module includes a kinetic energy detection module and a kinetic energy recording module for load kinetic energy, which can detect and record the load kinetic energy in the circuit after current output, thereby determining the peak current withstand capability of the circuit breaker.

[0009] Optionally, a piston is slidably connected to the end of the air tube near the circuit breaker, and a thrust spring is fixedly connected between the piston and the air tube. This spring can push the piston after the slide plate moves, thereby achieving the function of detecting the deformation of the moving contact piece.

[0010] Optionally, the metal plate has a cavity inside, and a wire electrically connected to the metal plate is installed inside the cavity. A movable plug is slidably connected inside the cavity, and an air pipe is connected to the cavity to drive the movable plug, so as to facilitate the detection of the arcing state.

[0011] Optionally, the cavity is filled with combustible gas located below the moving plug. The property of the combustible gas to be ignited by an electric arc can provide power for the movement of the moving plug.

[0012] Optionally, one-way valves are installed at both ends of the gas tube to improve gas sealing and prevent gas leakage. Ammonia and carbon dioxide are respectively filled between the piston and the two one-way valves.

[0013] Optionally, the gas detector is installed on the exhaust pipe to detect the released gas.

[0014] Optionally, a partition plate is installed between the exhaust pipe and the air pipe, a wind plate is rotatably connected to the partition plate, a rotating shaft of the wind plate is fixedly connected to a rotating plate penetrating through the exhaust pipe, so that the staff can know the fault details of the withstand test after carrying the maximum current more timely.

[0015] Compared with the prior art, the advantages of the present application are that:

[0016] (1) The scheme can detect whether the contacts of the circuit breaker are damaged and whether the circuit breaker has an arc phenomenon by the damage detection device, and if one of the two conditions occurs, the maximum current carried is recorded, and if neither of the two conditions occurs, the current is increased, and the circuit current is continuously output until the withstand limit of the circuit breaker is tested, and the peak withstand test module can detect and record the load kinetic energy in the circuit after the current output to obtain the peak current withstand capability of the circuit breaker, in addition, the partition plate can use the pushing force of the gas to drive the wind plate to rotate in different directions, helping the staff to know the fault details of the withstand test after carrying the maximum current more timely, and improving the accuracy and test efficiency of the withstand test result.

[0017] (2) The peak withstand test module comprises a kinetic energy detection module and a kinetic energy recording module for load kinetic energy, which can detect and record the load kinetic energy in the circuit after the current output to obtain the peak current withstand capability of the circuit breaker.

[0018] (3) The piston is slidably connected to one end of the air pipe close to the circuit breaker, and the piston is fixedly connected with a thrust spring between the piston and the air pipe, which can push the piston after the sliding plate moves, and further achieve the function of detecting the deformation of the moving contact.

[0019] (4) The metal plate is internally provided with a cavity, the cavity is internally provided with a wire electrically connected with the metal plate, and the cavity is internally provided with a movable plug, the air pipe is communicated with the cavity, which can drive the movable plug to move, so as to detect the arc state.

[0020] (5) The cavity is filled with combustible gas under the movable plug, which can provide power for the movement of the movable plug by using the property that the electric arc ignites the combustible gas.

[0021] (6) The air pipe is provided with a one-way valve at both ends, which can improve the sealing property of the gas and avoid leakage of the gas. The piston and the movable plug are respectively filled with ammonia and carbon dioxide between the two one-way valves.

[0022] (7) The gas detector is installed on the exhaust pipe to detect the released gas.

[0023] (8) The partition plate is installed between the discharge pipe and the air pipe, the air baffle is rotatably connected to the partition plate, the rotating shaft of the air baffle penetrates through the discharge pipe and is fixedly connected with the rotating plate, which can help the staff to know the fault details of the withstand test after bearing the maximum current more timely. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a system diagram of the present application;

[0025] Figure 2 It is a system flow chart of the present application;

[0026] Figure 3 It is a structure diagram of the inside of the detection shell of the present application;

[0027] Figure 4 It is a top view sectional view of the detection shell of the present application;

[0028] Figure 5 It is a structure diagram of the inside of the circuit breaker of the present application;

[0029] Figure 6 It is a structure diagram of the slide plate of the present application;

[0030] Figure 7 It is a front view sectional view of the circuit breaker of the present application;

[0031] Figure 8 It is a structure diagram of the inside of the air pipe of the present application;

[0032] Figure 9 It is a front view sectional view of the metal plate of the present application;

[0033] Figure 10 It is a top view sectional view of the discharge pipe of the present application.

[0034] Explanation of reference numerals in the drawings:

[0035] 1 detection shell, 11 circuit breaker, 111 static contact, 112 dynamic contact, 113 magnetic slide plate, 114 electromagnet, 115 connecting spring, 12 arc extinguishing grid, 13 metal plate, 131 cavity, 132 moving plug, 133 wire, 2 slide plate, 21 roller, 22 vent, 3 air pipe, 31 one-way valve, 32 piston, 33 thrust spring, 4 discharge pipe, 41 partition plate, 42 air baffle, 43 rotating plate. DETAILED DESCRIPTION

[0036] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0037] Embodiment 1

[0038] The present application discloses a short-time withstand current test device, please refer to Figures 1-2 , including current output module, short circuit control module, circuit breaker 11, peak withstand test module, short-time withstand test module, the current output module is connected with the short circuit control module, the short circuit control module is connected with the circuit breaker 11, the circuit breaker 11 is connected with the short-time withstand test module and the peak withstand test module respectively, the short-time withstand test module includes controller, gas detector and damage detection equipment, the controller is connected with the current output module, the damage detection equipment is connected with the circuit breaker 11;

[0039] Please refer to Figures 3-7 , the damage detection equipment includes detection shell 1, the circuit breaker 11 is installed inside the detection shell 1, the metal plate 13 is installed inside the detection shell 1, the arc extinguishing grid 12 is installed between the circuit breaker 11 and the metal plate 13 inside the detection shell 1, the gas pipe 3 is connected between the metal plate 13 and the circuit breaker 11, the sliding plate 2 is slidingly connected to the left and right inner walls of the circuit breaker 11, the two rollers 21 are rotatably connected between the two sliding plates 2, two ventilation openings 22 are opened in one of the sliding plates 2, the static contact 111 is installed on the left inner wall of the circuit breaker 11, the dynamic contact 112 is installed between the two rollers 21 of the detection shell 1, the magnetic sliding plate 113 is installed at the right end of the dynamic contact 112, the connecting spring 115 is fixedly connected between the magnetic sliding plate 113 and the circuit breaker 11, the electromagnet 114 is installed inside the circuit breaker 11 and is magnetically repulsive to the magnetic sliding plate 113, the exhaust pipe 4 is connected to the gas pipe 3, and the warning whistle is installed on the exhaust pipe 4.

[0040] Please refer to Figures 8-9 , in use, first, the staff carries out current output to the circuit through the current output module, and cooperates with the short circuit control module to carry out simulated short circuit fault program, so as to test the circuit breaker 11, when the short-time withstand current test is carried out, the damage detection equipment is used to detect whether the contact of the circuit breaker 11 is damaged, and whether the arc spraying phenomenon of the circuit breaker 11 occurs, if one of the two cases occurs, the maximum current carried is recorded, if neither of the two cases occurs, the current is increased, and the circuit current is continuously output until the withstand limit of the circuit breaker 11 is tested.

[0041] The peak withstand test module comprises a kinetic energy detection module and a kinetic energy recording module for load kinetic energy.

[0042] Through the peak withstand test module, the load kinetic energy in the circuit can be detected and recorded after current output, so as to obtain the peak current withstand capability of the circuit breaker 11.

[0043] The piston 32 is slidably connected to the air pipe 3 near one end of the circuit breaker 11, and the push spring 33 is fixedly connected between the piston 32 and the air pipe 3. The metal plate 13 is provided with a cavity 131 inside, the wire 133 electrically connected with the metal plate 13 is installed inside the cavity 131, and the movable plug 132 is slidably connected inside the cavity 131. The air pipe 3 is in communication with the cavity 131, and the cavity 131 is filled with combustible gas below the movable plug 132. The air pipe 3 is provided with a one-way valve 31 at both ends, and the piston 32 and the movable plug 132 are respectively filled with ammonia gas and carbon dioxide between the two one-way valves 31. The gas detector is installed on the exhaust pipe 4.

[0044] When the circuit breaker 11 is detected by the damage detection device, first, the magnetic force generated by the electromagnet 114 inside the circuit breaker 11 is used to drive the magnetic slide plate 113 to move, and then drive the moving contact 112 to connect with the static contact 111. When the circuit is short-circuited, if the moving contact 112 cannot withstand the high temperature caused by the fault and is deformed, when the electromagnet 114 is powered off, the connecting spring 115 pulls the moving contact 112 back to its original position through the magnetic slide plate 113. The roller 21 will roll according to the arc surface of the moving contact 112, and then drive the slide plate 2 to move up and down, as shown in FIG. Figures 6-7 When the air pipe 3 is in communication with the circuit breaker 11, the piston 32 moves under the pushing force of the push spring 33 after losing the negative pressure limit, so that the ammonia gas filled in the air pipe 3 is discharged from the exhaust pipe 4 through the one-way valve 31, and then the generated gas flow drives the warning whistle to emit a warning sound, informing the staff that the current circuit breaker 11 has reached the short-time current withstand limit state.

[0045] When the static contact 111 and the moving contact 112 are separated, if the current carried is too large, arc phenomenon may occur, that is, the current passes through the arc extinguishing grid 12 and hits the metal plate 13, causing the combustible gas in the cavity 131 to ignite through the wire 133, and then generating expansion pressure to push the movable plug 132 to move upward, so that the carbon dioxide gas filled in the air pipe 3 is also discharged from the exhaust pipe 4 through the one-way valve 31.

[0046] In this way, the gas detector can detect the type of gas to determine the specific failure reason of the circuit breaker 11 after carrying the maximum current.

[0047] Example 2:

[0048] Compared with Embodiment 1, please refer to Figure 10 This embodiment adds the partition plate 41, which can more intuitively help the worker to understand the fault details of the withstand test after bearing the maximum current, and the implementation is as follows:

[0049] The partition plate 41 is installed between the discharge pipe 4 and the air pipe 3, the air plate 42 is rotationally connected on the partition plate 41, and the rotating shaft of the air plate 42 is fixedly connected with the rotating plate 43.

[0050] When the moving contact 112 in the circuit breaker 11 is deformed or the metal plate 13 is hit by the arc, different gases enter the inside of the discharge pipe 4 from the two ends of the air pipe 3, the air plate 42 is driven to rotate in different directions by the pushing force of the gas, and the worker can more timely understand the fault details of the withstand test after bearing the maximum current.

[0051] The above is only the preferred specific implementation manner of the present application; however, the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the improved conception of the present application, should be covered in the protection scope of the present application, which is equivalent to the replacement or change within the technical range disclosed by the present application.

Claims

1. A short-time withstand current test device, comprising a current output module, a short-circuit control module, a circuit breaker (11), a peak withstand test module, and a short-time withstand test module, characterized in that: The current output module is connected to the short-circuit control module, the short-circuit control module is connected to the circuit breaker (11), the circuit breaker (11) is connected to the short-time withstand test module and the peak withstand test module respectively, the short-time withstand test module includes a controller, a gas detector and a damage detection device, the controller is connected to the current output module, and the damage detection device is connected to the circuit breaker (11); The damage detection equipment includes a detection housing (1), the circuit breaker (11) is installed inside the detection housing (1), a metal plate (13) is installed inside the detection housing (1), an arc-extinguishing grid (12) is installed inside the detection housing (1) between the circuit breaker (11) and the metal plate (13), an air pipe (3) is connected between the metal plate (13) and the circuit breaker (11), sliding plates (2) are slidably connected to the left and right inner walls of the circuit breaker (11), and two rollers (21) are rotatably connected between the two sliding plates (2), one of the sliding plates (2) has a groove. Two ventilation openings (22), a stationary contact plate (111) is installed on the left inner wall of the circuit breaker (11), a moving contact plate (112) is installed between the two rollers (21) of the detection housing (1), a magnetic sliding plate (113) is installed on the right end of the moving contact plate (112), a connecting spring (115) is fixedly connected between the magnetic sliding plate (113) and the circuit breaker (11), an electromagnet (114) that is magnetically repelled by the magnetic sliding plate (113) is installed inside the circuit breaker (11), a drain pipe (4) is connected to the air pipe (3), and a warning whistle is installed on the drain pipe (4).

2. The short-time withstand current test device according to claim 1, characterized in that: The peak endurance test module includes a kinetic energy detection module and a kinetic energy recording module for loading kinetic energy.

3. The short-time withstand current test device according to claim 1, characterized in that: A piston (32) is slidably connected to one end of the air tube (3) near the circuit breaker (11), and a thrust spring (33) is fixedly connected between the piston (32) and the air tube (3).

4. The short-time withstand current test device according to claim 3, characterized in that: The metal plate (13) has a cavity (131) inside, and a wire (133) electrically connected to the metal plate (13) is installed inside the cavity (131).

5. The short-time withstand current test device according to claim 4, characterized in that: A movable plug (132) is slidably connected inside the cavity (131), and the air tube (3) is connected to the cavity (131).

6. The short-time withstand current test device according to claim 5, characterized in that: The cavity (131) is filled with combustible gas located below the movable plug (132).

7. The short-time withstand current test device according to claim 3, characterized in that: One-way valves (31) are installed at both ends of the air pipe (3).

8. The short-time withstand current test device according to claim 7, characterized in that: The piston (32) and the movable plug (132) are respectively filled with ammonia and carbon dioxide between them and the two one-way valves (31).

9. A short-time withstand current test device according to claim 3, characterized in that: The gas detector is installed on the pipe (4).

10. A short-time withstand current test device according to claim 3, characterized in that: A partition (41) is installed between the pipe (4) and the air pipe (3). A wind plate (42) is rotatably connected to the partition (41). The rotating shaft of the wind plate (42) passes through the pipe (4) and is fixedly connected to a rotating plate (43).

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