High-voltage switch arc observation test device

Abstract

The utility model relates to the field of testing devices for testing breakdown voltage, in particular to an arc observation testing device for a high-voltage switch. The high-voltage switch arc observation test device comprises a sample circuit breaker, a cylindrical shell of the sample circuit breaker is provided with groups of observation windows at positions corresponding to fractures, and the included angle between at least two observation windows in the circumferential direction is 0-180 degrees. And the nozzle of the sample circuit breaker is exposed in the visual angle range of the observation window in the radial direction. The electric arc can be observed from multiple angles through the groups of observation windows arranged on the circumference of the cylindrical shell, and different two-dimensional form information of the electric arc can be observed through at least two observation windows with the included angle ranging from 0 degree to 180 degrees in the circumferential direction in the groups of observation windows. More complete arc form information can be obtained through analysis of the two-dimensional form information, and the problems that an existing observation test device is single in window and cannot completely and accurately observe the form information of the zero-zone arc are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the test device field of test breakdown voltage, especially, relate to a high voltage switch electric arc observation test device. BACKGROUND

[0002] The high voltage switch can produce electric arc in the breaking process, and the existence of electric arc can influence the performance and life of the switch, and even can cause safety accident. Therefore, the accurate observation and analysis of the high voltage switch electric arc have important significance for improving the reliability and safety of the switch equipment, and can provide guidance for the optimized design of the switch.

[0003] The Chinese invention patent with the authorization announcement number CN105259501B and the authorization announcement date 2019 / 07 / 05 discloses a kind of high voltage direct current breaking experimental device, and the device includes device body, and device body includes the cylinder body extending along up-down direction, static arc contact, movable arc contact are arranged in cylinder body, cylinder body is connected with the operating mechanism for driving movable arc contact and static arc contact to carry out opening and closing in one end of movable arc contact, the operating mechanism includes the air cylinder that can drive movable contact to act up and down, air cylinder is connected with spout, the observation window for observing the electric arc generated when movable arc contact and static arc contact open and close is arranged on the cylinder body, light-transmitting cover plate is arranged on the observation window, the form of electric arc when opening and closing can be observed through the cover plate on the observation window.

[0004] But in the above-mentioned comparison document, two observation windows on the cylinder body are arranged at 180° angle, which belongs to single observation angle, and single observation angle cannot completely represent the form information of electric arc, and light will be refracted after passing through cover plate, and single observation angle also cannot accurately observe the form information of electric arc. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of high voltage switch electric arc observation test device, to solve the single observation window of existing experimental device, cannot completely and accurately observe the form information of zero zone electric arc.

[0006] To achieve the above-mentioned purpose, the high voltage switch electric arc observation test device of the utility model adopts the following technical scheme:

[0007] A kind of high voltage switch electric arc observation test device, including sample circuit breaker, sample circuit breaker includes circuit breaker body, the cylindrical shell of circuit breaker body is provided with a group of observation windows on the position corresponding to fracture, at least two observation windows are arranged at 0-180° between the included angle in circumferential direction, and the spout of sample circuit breaker is exposed in the visual angle range of observation window in radial direction.

[0008] Further, the observation windows of the same group are arranged at intervals in circumferential direction.

[0009] Further, two observation windows are arranged in the same group, and the two observation windows are arranged at an angle of 90°.

[0010] Further, the nozzle is arranged at the position of the just-opened moving and static arc contact, and the nozzle is a light-transmitting nozzle.

[0011] Further, the light-transmitting nozzle is an organic glass nozzle.

[0012] Further, the test device further comprises a high-speed camera arranged at the observation window.

[0013] Further, the test device further comprises a voltage divider connected in parallel with the sample circuit breaker.

[0014] Further, the sample circuit breaker is a horizontal circuit breaker, and the outgoing and incoming bus bars are arranged at two ends of the circuit breaker body and extend upwards.

[0015] Beneficial effects: the high-voltage switch arc observation test device is a factor change invention. Specifically, the observation windows arranged in groups are arranged on the cylindrical shell of the sample circuit breaker, and the included angle of at least two observation windows in the circumferential direction is between 0-180°. When the sample circuit breaker is opened and closed, an arc is generated at the breaking point. The observation windows arranged in groups on the circumferential direction of the cylindrical shell can observe the arc from multiple angles, and at least two observation windows in the observation windows arranged in groups and having an included angle of 0-180° in the circumferential direction can observe different two-dimensional morphological information of the arc. Through analysis of the two-dimensional morphological information, more complete arc morphological information can be obtained, and the problem that the existing observation test device has a single window viewing angle and cannot completely and accurately observe the morphological information of the zero-zone arc is solved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the device body of the arc observation test device of the utility model;

[0017] Figure 2 It is a structural schematic view of the device body of the arc observation test device of the utility model; Figure 1 It is an arc observation effect schematic view when the arc is generated between the moving and static arc contact;

[0018] Figure 3 It is a general scheme view of the arc observation test device of the utility model.

[0019] In the figure: 1, operating mechanism; 2, outgoing bus bar; 3, observation window; 31, cavity; 5, incoming bus bar; 6, moving arc contact; 7, arc; 8, nozzle; 9, static arc contact; 10, sample circuit breaker. DETAILED DESCRIPTION

[0020] The utility model discloses a set of observation windows are arranged on the shell of the sample circuit breaker, and the included angle of at least two observation windows in the circumferential direction is between 0-180 degrees, the set of observation windows can observe the electric arc from multiple angles, and the observation windows arranged on the shell and having an included angle between 0-180 degrees can observe different two-dimensional information of the electric arc from different angles.

[0021] Based on the above concept, the high-voltage switch electric arc observation test device includes a sample circuit breaker 10, the sample circuit breaker 10 includes a circuit breaker body, a set of observation windows 3 are arranged on the cylindrical shell of the circuit breaker body corresponding to the fracture position, and the included angle of at least two observation windows 3 in the circumferential direction is between 0-180 degrees, the nozzle of the sample circuit breaker 10 is exposed in the viewing angle range of the observation window 3 in the radial direction, and the shape of the electric arc at the fracture position when the sample circuit breaker is in operation can be observed through the observation window 3.

[0022] In a preferred embodiment, the same group of observation windows 3 in the set of observation windows 3 are arranged at intervals in the circumferential direction. In other embodiments, the set of observation windows 3 can be arranged side by side or in a circumferential order on the cylindrical shell corresponding to the fracture. Preferably, two observation windows 3 are arranged in the same group, and the two observation windows 3 can be arranged at different angles between 0-180 degrees. Preferably, the two observation windows 3 are arranged at an angle of 90 degrees, and the electric arc shapes observed by the observation windows 3 arranged at an angle of 90 degrees are more different and more representative.

[0023] As shown in Figures 1-2 The circuit breaker body includes a cavity 31 wrapped by the cylindrical shell thereof, a static arc contact 9 and a dynamic arc contact 6 arranged along the central axis direction of the cavity 31, and a driving mechanism 1 for driving the dynamic and static arc contacts to open and close at one end of the dynamic arc contact 6. The static arc contact 9 is connected with a power supply end. Since the shielding cover, contact finger and other parts on the sample circuit breaker will block the dynamic and static arc contacts when observing the electric arc, the shielding cover and the contact finger and other parts that block the dynamic and static arc contacts in the radial direction are removed from the complete finished circuit breaker.

[0024] The nozzle 8 arranged in the device body 10 can prevent the jumping and spreading of the electric arc 7, and stabilize the electric arc 7 at a certain position. In order to facilitate the observation of the electric arc 7, the nozzle 8 is arranged at the just-separated position of the dynamic and static arc contacts and has light transmission. Since the organic glass has good light transmission and high mechanical strength, it can withstand high temperature and high pressure environment. The nozzle 8 is preferably an organic glass nozzle. In other embodiments, the nozzle 8 can also be made of acrylic resin material or other high-temperature-resistant and corrosion-resistant glass materials.

[0025] The sample circuit breaker 10 is a horizontal circuit breaker, and the sample circuit breaker 10 comprises a circuit breaker body, an incoming bus 5 arranged at the incoming line side of the circuit breaker body, and an outgoing bus 2 arranged at the outgoing line side of the circuit breaker body, wherein the incoming bus 5 and the outgoing bus 2 extend upwards along the circuit breaker body. In other embodiments, the sample circuit breaker 10 can also be placed vertically, and the incoming bus 5 and the outgoing bus 2 extend along the axis direction of the circuit breaker body.

[0026] By observing the extinguishing and reignition process of the arc 7 near the zero-crossing point, and analyzing the key factors affecting the extinguishing and reignition of the arc 7, guidance can be provided for the optimized design of the switch device. Since the forming and extinguishing process of the arc 7 at the zero-crossing point is short, usually in the order of microseconds to milliseconds, the observation device is required to have extremely high resolution. Preferably, the test device in the utility model comprises a high-speed camera arranged on the upper side of the observation window 3, which is used to capture the transient changes of the arc 7 in the zero zone. In other embodiments, a photoelectric sensor can also be used to accurately measure the intensity and position of the arc and other information.

[0027] As shown in Figure 3 The arc observation test device of the utility model further comprises a synthetic circuit controller, an oscilloscope, and a voltage divider. The synthetic circuit controller sends control signals to the opening and closing controller and the oscilloscope, and simultaneously sends a synchronous trigger signal to the high-speed camera for collection. The opening and closing controller controls the action of the sample circuit breaker through a driver and a motor. The oscilloscope simultaneously collects the current sent by the synthetic circuit, the stroke data of the sample circuit breaker, and the voltage of the voltage divider, and comprehensively determines the time and value of the current represented by the collected signals based on the above data. The high-speed camera is used to observe the arc shape, and the voltage divider is connected in parallel to the breaking point of the circuit breaker, and the arc voltage is measured by a differential method. The data measured by the arc observation test device can also be used to calibrate the arc simulation calculation model, improve the calculation accuracy, and guide the development of new products.

[0028] The above is only a preferred embodiment of the utility model, and does not limit the utility model, and the patent protection range of the utility model is subject to the claims, and any equivalent structural changes made by referring to the contents of the specification and drawings of the utility model should also be included in the protection range of the utility model.

Claims

1. A high-voltage switch arc observation and testing device, characterized in that, The test circuit breaker includes a circuit breaker body. The cylindrical outer shell of the circuit breaker body has a group of observation windows at the position corresponding to the break. At least two of the observation windows are at an angle between 0 and 180° in the circumferential direction. The nozzle of the test circuit breaker is exposed in the radial direction within the viewing angle of the observation windows.

2. The high-voltage switch arc observation test device according to claim 1, characterized in that, The observation windows in the same group are arranged at intervals in the circumferential direction.

3. The high-voltage switch arc observation test device according to claim 2, characterized in that, There are two observation windows in the same group, and the two observation windows are arranged at a 90° angle to each other.

4. The high-voltage switch arc observation test device according to claim 1, characterized in that, The nozzle is located at the point where the moving and stationary arc contacts are just separated, and the nozzle is a light-transmitting nozzle.

5. The high-voltage switch arc observation test device according to claim 4, characterized in that, The light-transmitting nozzle is an acrylic nozzle.

6. The high-voltage switch arc observation test apparatus according to any one of claims 1-5, characterized in that, The experimental setup also includes a high-speed camera, which is positioned at the observation window.

7. The high-voltage switch arc observation test apparatus according to any one of claims 1-5, characterized in that, The test apparatus also includes a voltage divider connected in parallel with the sample circuit breaker.

8. The high-voltage switch arc observation test apparatus according to any one of claims 1-5, characterized in that, The sample circuit breaker is a horizontal circuit breaker with the circuit breaker body arranged horizontally and the incoming and outgoing busbars located at both ends of the circuit breaker body and extending upwards.

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