Insulation test atmosphere conditioning device

Abstract

The utility model provides an insulation test atmospheric regulation device, include: box, vacuum device, pressurizing equipment, temperature and humidity adjusting device, measurement unit and controlling means, be provided with sliding assembly on the box bottom plate for conveying and placing the insulating component of waiting for measuring, temperature and humidity adjusting device with the inside communication of box, pressurizing equipment with the inside communication of box, vacuum device with the inside communication of box, measurement unit set up in the inside of box, controlling means is connected with temperature and humidity adjusting device, pressurizing equipment, vacuum device and measurement unit respectively, is used for receiving the temperature, humidity and atmospheric pressure data of measurement unit detection, and according to the working condition of regulating each device of setting test parameter, to the atmospheric condition in the box is adjusted to standard atmospheric condition or set atmospheric condition, the utility model discloses effectively avoided the influence of external atmospheric condition change to test result, improved the accuracy and repeatability of test data.

Description

Technical Field

[0001] This utility model relates to the field of power testing technology, and more specifically, to an atmospheric conditioning device for insulation testing. Background Technology

[0002] Insulation testing is an important item for verifying the insulation performance of distribution network switchgear. Medium-voltage switchgear shall be subjected to insulation testing in accordance with the national standard GB / T 11022-2020. When the laboratory atmospheric conditions differ from the standard atmospheric conditions during the test, the atmospheric correction factor shall be calculated in accordance with the methods specified in GB / T 11022-2020 and GB / T16927.1-2011.

[0003] According to GB / T 311.1-2012, external insulation mainly refers to the surface of solid insulation of equipment exposed to the atmosphere, which is subjected to operating voltage and affected by dirt, humidity, pests, etc.; internal insulation mainly refers to the solid, liquid, or gaseous insulation of equipment that is not affected by the atmosphere or other external conditions. Therefore, when the test specimen has only external insulation, the atmosphere correction factor should be used directly; when it has only internal insulation, the atmosphere correction factor should not be used. However, in practice, most test specimens (including medium-voltage switchgear) are electrical equipment with both external and internal insulation, and the assessment of their internal and external insulation usually needs to be coordinated.

[0004] Furthermore, in some cases, the calculated atmospheric correction factor k may exceed the range of 0.95 to 1.05. Therefore, the International Short Circuit Testing Association (STL) provides a recommended testing method, as follows: When only external insulation is considered, if the atmospheric correction factor k... t If the value is between 0.95 and 1.05, then use that factor directly; if k t If the value is less than 0.95 or greater than 1.05, it shall be negotiated between the manufacturer and the user; when only internal insulation is considered, regardless of k t Regardless of the value, no atmospheric correction factor is used; for cases with both internal and external insulation, the atmospheric correction factor is applied based on different k values. t Appropriate assessment methods will be adopted.

[0005] Obviously, for medium-voltage switchgear, it is difficult to conduct insulation tests fairly and impartially when atmospheric conditions differ from standard atmospheric conditions, especially when the atmospheric correction factor k differs significantly from 1. Summary of the Invention

[0006] In view of this, the present invention proposes an atmospheric conditioning device for insulation testing, which aims to solve the above-mentioned technical problems existing in the prior art.

[0007] This utility model proposes an atmospheric conditioning device for insulation testing, comprising: a chamber, a vacuum device, a pressurizing device, a temperature and humidity conditioning device, a measuring unit, and a control device; wherein...

[0008] A sliding assembly is provided on the bottom plate of the enclosure for transporting and placing the insulating component to be tested;

[0009] The temperature and humidity regulating device is connected to the inside of the box and is used to regulate the temperature and humidity inside the box;

[0010] The pressurizing device is connected to the inside of the chamber and is used to increase the pressure inside the chamber;

[0011] The vacuum device is connected to the inside of the box and is used to reduce and maintain the vacuum level inside the box.

[0012] The measuring unit is located inside the enclosure and is used to detect the temperature, humidity and atmospheric pressure inside the enclosure.

[0013] The control device is connected to the temperature and humidity control device, the pressurizing device, the vacuum device, and the measuring unit, respectively. It is used to receive temperature, humidity, and atmospheric pressure data detected by the measuring unit, and to adjust the working status of the vacuum device, the pressurizing device, and the temperature and humidity control device according to the set test parameters, so as to adjust the atmospheric conditions inside the chamber to the target atmospheric conditions.

[0014] Furthermore, in the aforementioned atmospheric conditioning device for insulation testing, the temperature and humidity conditioning device includes: an indoor unit and an outdoor unit; wherein,

[0015] The indoor unit is located inside the enclosure, and the outdoor unit is located outside the enclosure. The two are connected by refrigerant piping to achieve precise regulation of the temperature and humidity environment inside the enclosure.

[0016] Furthermore, in the aforementioned atmospheric conditioning device for insulation testing, the vacuum device includes: a main pump and a maintaining pump; wherein,

[0017] The main pump is connected to the inside of the housing through a first pipe, and is used to reduce the pressure inside the housing to a set value within a preset time.

[0018] The maintenance pump is connected to the inside of the chamber through a second pipe and is used to continuously extract trace amounts of gas that have seeped into the chamber in order to maintain the vacuum level inside the chamber.

[0019] Furthermore, the aforementioned atmospheric conditioning device for insulation testing also includes: a vacuum breaking device; wherein,

[0020] The vacuum breaking device is connected to the inside of the housing through several branch pipes, and each of the pipes is equipped with a pneumatic high-vacuum butterfly valve.

[0021] Furthermore, in the above-mentioned atmospheric conditioning device for insulation testing, the pressurizing device is an air compressor.

[0022] Furthermore, in the above-mentioned atmospheric conditioning device for insulation testing, the outer shell of the housing is provided with multiple high-voltage bushings for connecting the insulation component to be tested to external testing equipment.

[0023] Furthermore, the aforementioned atmospheric conditioning device for insulation testing also includes: a lighting unit; wherein,

[0024] The lighting unit is located above the interior of the enclosure and is used to provide illumination for the area where the insulating components to be tested are placed inside.

[0025] Furthermore, the aforementioned atmospheric conditioning device for insulation testing also includes: a video monitoring unit; wherein,

[0026] The video monitoring unit is located inside the enclosure and is used to monitor and record the status of the insulation component under test in real time.

[0027] Furthermore, in the above-mentioned atmospheric conditioning device for insulation testing, a sealed door is provided on one side of the enclosure that can be opened and closed.

[0028] Furthermore, in the above-mentioned atmospheric conditioning device for insulation testing, a transparent observation window is provided on the chamber for observing the test status inside the chamber.

[0029] The atmospheric conditioning device for insulation testing in this utility model, by setting up a vacuum device, a pressurizing device and a temperature and humidity conditioning device, and combining a measuring unit and a control device, can automatically or manually adjust the atmospheric pressure of the air around the insulating component under test inside the device shell to standard atmospheric conditions or specific atmospheric conditions according to the test requirements. This effectively avoids the influence of changes in external atmospheric conditions on the test results, improves the accuracy and repeatability of test data, and has good application prospects and promotion value. Attached Figure Description

[0030] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0031] Figure 1 A three-dimensional structural schematic diagram of the atmospheric conditioning device for insulation testing provided in this embodiment of the utility model;

[0032] Figure 2A front view of the atmospheric conditioning device for insulation testing provided in an embodiment of this utility model;

[0033] Figure 3 A side view of the atmospheric conditioning device for insulation testing provided in an embodiment of this utility model. Detailed Implementation

[0034] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] See Figure 1-3 The insulation test atmospheric conditioning device of this utility model embodiment includes: a chamber 1, a vacuum device 2, a pressurizing device 3, a temperature and humidity conditioning device 4, a measuring unit (not shown in the figure), and a control device 5; wherein, a sliding plate assembly 6 is provided on the bottom plate of the chamber 1 for transporting and placing the insulating component to be tested (not shown in the figure); the temperature and humidity conditioning device 4 is connected to the interior of the chamber 1 for adjusting the temperature and humidity inside the chamber 1; the pressurizing device 3 is connected to the interior of the chamber 1 for increasing the pressure inside the chamber 1; the vacuum device 2 is connected to the interior of the chamber 1 for lowering and maintaining the pressure inside the chamber. The vacuum level inside chamber 1; the measuring unit is located inside chamber 1 and is used to detect the temperature, humidity and atmospheric pressure inside chamber 1; the control device 5 is connected to the temperature and humidity regulating device 4, the pressurizing device 3, the vacuum device 2 and the measuring unit respectively, and is used to receive the temperature, humidity and atmospheric pressure data detected by the measuring unit, and adjust the working state of the vacuum device 2, the pressurizing device 3 and the temperature and humidity regulating device 4 according to the set test parameters, so as to adjust the atmospheric conditions inside chamber 1 to the target atmospheric conditions, wherein the target atmospheric conditions are standard atmospheric conditions or set atmospheric conditions.

[0036] Specifically, the enclosure 1 can be a cuboid structure, with a sealed door 9 that can be opened and closed on one side, and an outdoor unit of temperature and humidity control device 4, a vacuum device 2, a pressurizing device 3 and a control device 5 arranged on the side wall of the other side.

[0037] More specifically, the enclosure 1 is made of 304 stainless steel with a thickness of 6mm. The manufacturing process adopts mature container technology. A stainless steel sealing door 9 is provided on the left side. The sealing door 9 is openable and closable at the left end of the enclosure 1. The sealing door 9 realizes the opening and closing function through a hinge connection, which makes it easy to put the insulating component to be tested into the enclosure 1 or take it out. It can withstand positive and negative pressure.

[0038] In this embodiment, the outer shell of the enclosure 1 is provided with multiple high-voltage bushings 7 for connecting the insulating component under test to external testing equipment. More specifically, multiple high-voltage bushings 7 are provided on the side wall of the outer side of the enclosure 1 away from the sealing door 9. Preferably, a transparent observation window is provided on the enclosure 1 for observing the test status inside the enclosure 1.

[0039] In this embodiment, the pressurizing device 3 is an air compressor. For example, an air compressor with a power of 7.5kW, a working pressure of 0.8MPa, and a volume of 38CFM can be selected.

[0040] The vacuum device 2 is connected to the interior of the housing 1 and is used to reduce the pressure inside the housing 1 from normal pressure to a set vacuum level, and to continuously remove leaks to maintain a stable vacuum environment.

[0041] The outer shell of the housing 1 is equipped with multiple high-voltage bushings for connecting the insulating component to be tested to external testing equipment.

[0042] Specifically, the number of high-voltage bushings can be determined according to the test requirements. For example, 24 high-voltage bushings can be set up. The high-voltage bushings are used to pass through pre-insulated wires. The pre-insulated wires can withstand a power frequency withstand voltage of 140kV and a lightning impulse voltage of 325kV.

[0043] In practice, when the atmospheric conditions inside the device are at standard atmospheric conditions, the terminal leads of the switchgear are connected to the insulation testing equipment, and the insulation test can be performed on the sample inside the device. The sample inside the device is not affected by the external atmospheric conditions.

[0044] In this embodiment, a sliding plate assembly 6 is provided on the bottom plate inside the housing 1 to transport the insulating component to be tested.

[0045] Specifically, the slide assembly 6 includes a slide 61 and a first guide rail assembly 62; wherein the first guide rail assembly 62 is connected to the upper surface of the base plate, and the bottom of the slide is slidably connected to the upper part of the first guide rail assembly 62; in actual use, the slide assembly 6 can be moved by manually pushing and pulling to transport the insulating component to be tested; preferably, this embodiment may also include a drive mechanism (not shown in the figure); the drive mechanism can be disposed on one side of the first guide rail assembly 62 to drive the slide to slide along the first guide rail assembly 62.

[0046] In practice, the first guide rail assembly 62 includes two parallel metal guide rails arranged on the bottom plate of the housing 1. Multiple sliders are provided at the bottom of the slide plate, and these sliders slide in cooperation with the first guide rail assembly 62. The sliders are preferably in the form of ball bearings or rollers to reduce frictional resistance and improve guiding accuracy. The drive mechanism includes a servo motor, a lead screw, and a nut assembly, used to drive the slide plate to reciprocate along the first guide rail assembly 62. More specifically, the servo motor is connected to the lead screw via a coupling and drives its rotation. The nut is fixed to the slide plate and forms a helical transmission pair with the lead screw, thereby driving the slide plate to perform high-precision linear reciprocating motion along the guide rails. The control device 5 is connected to the drive mechanism and is used to control the start / stop, speed, and travel position of the slide plate.

[0047] In this embodiment, by setting the above-mentioned track slide assembly 6, flexible displacement adjustment of the internal components can be achieved without changing the overall structure of the housing 1, thereby improving the automation level and ease of use of the equipment.

[0048] Of course, in this embodiment, a support platform 8 is also provided. The housing 1 is placed on the support platform, which extends outward from the side of the housing 1 away from the sealing door 9. The vacuum device 2 and the pressurizing device 3 are installed on the support platform on this side of the housing 1. A second guide rail assembly 63 is provided on the side of the support platform located outside the housing 1. The second guide rail assembly 63 is detachably inserted into the first guide rail assembly 62 inside the housing 1 to transport the insulating component to be tested into the housing 1 using a sliding plate. In practice, when the insulating component to be tested is transported to the set position inside the housing 1 and the sealing door 9 needs to be closed, the second guide rail assembly 63 can be disassembled.

[0049] In one embodiment of this utility model, the temperature and humidity regulating device 4 includes an indoor unit and an outdoor unit; wherein the indoor unit is placed inside the housing 1, and the outdoor unit is located outside the housing 1, and the two are connected by a refrigerant pipeline to achieve precise regulation of the temperature and humidity environment inside the housing 1.

[0050] More specifically, the temperature and humidity control device 4 employs a precision air conditioning system, including a 2-horsepower air conditioner. The indoor unit is located inside the left side of the enclosure 1, and the outdoor unit is installed in the equipment area on the right side of the enclosure 1. The two are connected via refrigerant piping. This air conditioning system can provide high-precision temperature and humidity control for the internal environment of the enclosure 1, meeting the adjustment requirements for atmospheric parameters under different test conditions.

[0051] The measurement unit may include several temperature sensors, humidity sensors and pressure sensors to collect temperature, humidity and atmospheric pressure data inside and outside the enclosure 1 in real time.

[0052] In this embodiment, the control device 5 can be installed on the side wall of the enclosure 1 away from the sealing door 9, responsible for centralized monitoring and coordinated control of the temperature and humidity regulating device 4, pressurizing equipment 3, vacuum device 2, and measuring unit. The control device 5 may include a programmable logic controller (PLC), a human-machine interface (HMI), and related power supply modules. The power supply module supplies power to the entire device. The PLC, as the main control unit, receives environmental parameters such as temperature, humidity, and atmospheric pressure collected from the measuring unit, and automatically adjusts the start / stop of the vacuum pump group, the operating status of the air compressor, and the temperature and humidity output of the temperature and humidity regulating device 4 according to preset test conditions or user-defined target parameters, thereby precisely adjusting the atmospheric conditions inside the enclosure 1 to standard atmospheric conditions or the atmospheric conditions required for a specific test. The control device 5 also includes a storage unit to save real-time monitoring data such as temperature, humidity, and pressure during the test, and supports the querying and export of historical data. In other words, the controller realizes atmospheric condition control, real-time atmospheric condition monitoring, and historical data storage. The human-machine interface can be a 10-inch touchscreen, displaying recorded curves and fault alarms (such as leakage and overpressure).

[0053] Continue reading Figure 1 The vacuum device 2 includes a main pump and a maintenance pump; wherein the main pump is connected to the interior of the housing 1 through a first pipe and is used to reduce the pressure inside the housing 1 to a set value within a preset time period; the maintenance pump is connected to the interior of the housing 1 through a second pipe and is used to continuously extract trace amounts of gas that have seeped into the housing 1 in order to maintain the vacuum level inside the housing 1.

[0054] Specifically, the main pump can be a screw vacuum pump or a rotary vane vacuum pump. If a screw vacuum pump is used, it should have a power of 7.5 kW, a pumping rate of 70 L / s, an ultimate pressure of 10 Pa, and an inlet diameter of 50 mm. The maintenance pump should have a lower power than the main pump.

[0055] In practice, the main pump is used to rapidly reduce the internal pressure of chamber 1 from atmospheric pressure (approximately 102.3 kPa) to 50.0 kPa (absolute pressure) within 5 minutes, while the maintenance pump is used to continuously extract the small amount of air leakage caused by poor sealing of chamber 1 during the test, thereby maintaining a stable vacuum environment.

[0056] Furthermore, it also includes: a vacuum breaking device 2; wherein, the vacuum breaking device 2 is connected to the interior of the housing 1 through several branch pipes, and each of the pipes is equipped with a pneumatic high-vacuum butterfly valve.

[0057] Specifically, the vacuum breaking device 2 can consist of two pipelines (e.g., DN20 pipes) connected between the chamber 1 and the outside atmosphere. The pipelines are equipped with pneumatic high-vacuum butterfly valves, which can quickly restore the air pressure inside the chamber 1 after the test, facilitating sample replacement or equipment maintenance.

[0058] In this embodiment, the insulation component to be tested can be a distribution network circuit breaker, a distribution network disconnector, a distribution network pole-mounted switch, a high-voltage switchgear, a ring main unit, or a ring main box, etc.

[0059] The insulation testing atmospheric conditioning device provided in this embodiment can be used for insulation testing of switchgear in laboratories in plains and high-altitude areas. In automatic mode, the device automatically adjusts the atmospheric conditions inside its casing to standard or specific conditions, such as increasing or decreasing atmospheric pressure, or adjusting temperature and humidity. In manual mode, the atmospheric conditions inside the casing can be manually adjusted, such as increasing or decreasing atmospheric pressure, or adjusting temperature and humidity. In high-altitude areas, when the atmospheric conditions inside the device are at standard atmospheric conditions, connecting the terminal leads of the switchgear to the insulation testing equipment allows for insulation testing of the components under test within the device.

[0060] It is evident from the above that the atmospheric conditioning device for insulation testing provided in this embodiment, by setting up a vacuum device, a pressurizing device, and a temperature and humidity conditioning device, and combining a measuring unit and a control device, can automatically or manually adjust the atmospheric pressure of the air surrounding the insulating component under test inside the device housing to standard atmospheric conditions or specific atmospheric conditions according to the test requirements. This effectively avoids the influence of changes in external atmospheric conditions on the test results, improves the accuracy and repeatability of test data, and has good application prospects and promotional value.

[0061] The above embodiments may further include: an illumination unit (not shown in the figure); wherein the illumination unit is disposed above the interior of the housing 1 and is used to provide illumination for the area where the insulating component to be tested is placed inside.

[0062] Specifically, the lighting unit includes at least one luminaire mounted inside the upper part of the enclosure 1 to provide basic illumination for the area where the insulating components to be tested are placed. The control switch or dimming module of the luminaire is located outside the enclosure 1, allowing the operator to control the lighting status without opening the enclosure 1.

[0063] In the above embodiments, the atmospheric conditioning device for insulation testing further includes a video monitoring unit (not shown in the figure); wherein the video monitoring unit is disposed inside the housing 1 and is used to monitor and record the status of the insulation component to be tested inside in real time.

[0064] Specifically, the video monitoring unit includes: a host, multiple first camera components and second camera components; wherein, each first camera component is respectively located at the corner inside the housing 1; each second camera component is located at the upper center inside the housing 1, and is used to adjust the viewing angle through remote control to achieve all-round and multi-angle monitoring of the insulating component under test; the host is located outside the housing 1, and is used to receive video signals from each first camera component and second camera component and process, store, manage and distribute these data.

[0065] Specifically, the first camera assembly can be a fixed-angle camera to provide basic coverage of the test area of ​​the insulating component under test; the second camera assembly can be a pan-tilt-zoom (PTZ) camera.

[0066] Preferably, both the first camera assembly and the second camera assembly have an IP67 protection rating to ensure stable operation under harsh environmental conditions and support 4K resolution to guarantee high-quality image acquisition capabilities.

[0067] The host is equipped with a large-capacity hard drive or other storage media, supports at least 30 days of continuous video recording storage, provides a real-time monitoring interface, allows operators to view the monitoring screen in real time through a connected monitor, and supports the retrieval and playback of historical recordings.

[0068] It is evident that operators can monitor the status changes of the internal insulating components under test at any time via a display device connected to the host, without opening enclosure 1, thus ensuring operational safety and improving work efficiency. The use of a high-resolution camera can capture subtle changes on the surface of the insulating components under test, providing ample data support for subsequent analysis. The 30-day video recording storage time facilitates users in reviewing historical experimental processes, aiding in troubleshooting and data analysis.

[0069] In summary, this invention, by incorporating a vacuum device, pressurization equipment, and temperature and humidity control device, along with a measurement unit and control device, can automatically or manually adjust the atmospheric conditions inside the device casing to standard or specific atmospheric conditions according to test requirements. This effectively avoids the influence of external atmospheric conditions on test results and improves the accuracy and repeatability of test data. Furthermore, the device is highly integrated, easy to operate, and possesses good environmental adaptability and long-term operational stability. It is particularly suitable for insulation performance research and testing fields with strict requirements on atmospheric conditions, providing a standardized and repeatable test platform for insulation evaluation of power equipment.

[0070] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An atmospheric conditioning device for insulation testing, characterized in that include: The enclosure, vacuum unit, pressurization equipment, temperature and humidity control device, measuring unit, and control device; among which, A sliding assembly is provided on the bottom plate of the enclosure for transporting and placing the insulating component to be tested; The temperature and humidity regulating device is connected to the inside of the box and is used to regulate the temperature and humidity inside the box; The pressurizing device is connected to the inside of the chamber and is used to increase the pressure inside the chamber; The vacuum device is connected to the inside of the box and is used to reduce and maintain the vacuum level inside the box. The measuring unit is located inside the enclosure and is used to detect the temperature, humidity and atmospheric pressure inside the enclosure. The control device is connected to the temperature and humidity control device, the pressurizing device, the vacuum device, and the measuring unit, respectively. It is used to receive temperature, humidity, and atmospheric pressure data detected by the measuring unit, and to adjust the working status of the vacuum device, the pressurizing device, and the temperature and humidity control device according to the set test parameters, so as to adjust the atmospheric conditions inside the chamber to the target atmospheric conditions.

2. The insulation test atmosphere adjusting apparatus according to claim 1, wherein The temperature and humidity control device includes: an indoor unit and an outdoor unit; wherein... The indoor unit is located inside the enclosure, and the outdoor unit is located outside the enclosure. The two are connected by refrigerant piping to achieve precise regulation of the temperature and humidity environment inside the enclosure.

3. The insulation test atmosphere adjusting apparatus according to claim 1, wherein The vacuum device includes: a main pump and a sustaining pump; wherein... The main pump is connected to the inside of the housing through a first pipe, and is used to reduce the pressure inside the housing to a set value within a preset time. The maintenance pump is connected to the inside of the chamber through a second pipe and is used to continuously extract trace amounts of gas that have seeped into the chamber in order to maintain the vacuum level inside the chamber.

4. The insulating test atmosphere adjusting apparatus according to claim 1, wherein Also includes: Destroy the vacuum device; among which, The vacuum breaking device is connected to the inside of the housing through several branch pipes, and each of the pipes is equipped with a pneumatic high-vacuum butterfly valve.

5. The conditioned atmosphere system for insulation testing of claim 1, wherein, The pressurizing device is an air compressor.

6. The conditioned atmosphere system for insulation testing of claim 1, wherein, The outer shell of the enclosure is equipped with multiple high-voltage bushings for connecting the insulating component under test to external testing equipment.

7. The conditioned atmosphere system for insulation testing of claim 1, wherein, Also includes: Lighting unit; wherein, The lighting unit is located above the interior of the enclosure and is used to provide illumination for the area where the insulating components to be tested are placed inside.

8. The conditioned atmosphere system for insulation testing of claim 1, wherein, Also includes: Video surveillance unit; among which, The video monitoring unit is located inside the enclosure and is used to monitor and record the status of the insulation component under test in real time.

9. The conditioned atmosphere system for insulation testing of claim 1, wherein, A sealed door is provided on one side of the enclosure that can be opened and closed.

10. The conditioned atmosphere system for insulation testing of claim 1, wherein, The chamber is equipped with a transparent observation window for observing the test status inside the chamber.

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