Device for analyzing insulating medium

Abstract

The invention relates to a device (100) for evaluating an insulating medium (101), comprising: an on-load tap changer (2) having an on-load switch container (10); a first line (40) and a second line (50); an access part (13); wherein the on-load switcher container (10), the first line (40) and the second line (50) form an insulating medium circuit (5), in which the connection (13) is arranged; the insulating medium (101) circulates in the insulating medium circuit (5) by means of heat convection; according to the invention, the evaluation of the insulating medium (101) is carried out locally by means of a sensor device (16) arranged in the access (13) or externally after the extraction of the insulating medium (101) by means of the access (13).

Description

Technical Field

[0001] This invention relates to an apparatus for analyzing insulating media. Background Technology

[0002] Not only transformers, but also the on-load tap changers installed inside them have traditionally used oil for insulation and cooling. Monitoring the oil inside transformers is relatively simple, but monitoring the oil inside on-load tap changers is associated with enormous difficulties. Summary of the Invention

[0003] Therefore, the object of the present invention is to provide an apparatus for analyzing the insulating medium in an on-load tap changer, the apparatus being constructed in a simple and inexpensive manner, capable of local monitoring, and being installed at low cost, or providing a simple method for extracting the insulating medium for external analysis.

[0004] This task is solved by the apparatus for analyzing insulating media according to claim 1. The dependent claims constitute advantageous embodiments of the invention.

[0005] This invention proposes an apparatus for analyzing insulating media, the apparatus comprising: an on-load tap changer with an on-load switch container; a first conduit and a second conduit; and an access point; wherein the on-load switch container, the first conduit, and the second conduit form an insulating media loop, and the access point is disposed in the insulating media loop; the insulating media circulates within the insulating media loop by means of thermal convection; the analysis of the insulating media is performed locally by means of a sensor device disposed in the access point, or externally after the insulating media is extracted through the access point.

[0006] This device enables a particularly simple and straightforward analysis of the insulating medium within the on-load tap changer container of an on-load tap changer. On-load tap changers are generally standardized with two conduits: a first conduit connects the on-load tap changer to an oil expansion vessel, and a second conduit allows for the extraction of the insulating medium from the on-load tap changer container during maintenance. By connecting these two conduits externally to the on-load tap changer container, an insulating medium loop is formed, equipped with an access point for extraction and / or a sensor device positioned at this access point. Furthermore, connecting the two conduits causes the insulating medium to circulate within this loop. Because the insulating medium within the on-load tap changer container inside the transformer is hotter than the air surrounding the transformer and the two conduits, the insulating medium flows from the first conduit through the second conduit and through the access point with the sensor device, before flowing back to the on-load tap changer. Thus, the insulating medium recirculates from the on-load tap changer container through the loop at the access point based on thermal convection, which is caused by the temperature difference in the insulating medium loop. Since existing transformers and on-load tap changers typically have two conduits extending into and out of the on-load tap changer container, the connection of these two conduits can be designed relatively simply and cost-effectively, thereby enabling "online" monitoring of the insulating medium on existing on-load tap changers. On one hand, the access point enables state analysis of the insulating medium by continuously extracting it from the insulating medium loop. Furthermore, sensor devices arranged in the access point can detect different data and parameters of the insulating medium in real time, and also enable state analysis of the insulating medium. After the insulating medium is extracted from the insulating medium loop, it is used for external analysis.

[0007] The on-load tap changer can be constructed in any manner and method and may include an on-load switch within an on-load switch container, corresponding to a simple on-load switch or an on-load selector. Thus, the on-load tap changer can be constructed as an on-load selector, or it can be constructed as an on-load tap changer with both an on-load switch and a selector.

[0008] The access point can be constructed in any manner and method, for example, as a stopcock, ball valve, or other form of access point for insulating media. The access point is configured to facilitate the extraction of insulating media samples, or to enable the creation of sensor devices for insulating media via or by means of the access point. The access point may include an extraction device, which can also be constructed as a stopcock or ball valve.

[0009] For example, the first and second pipelines can be directly connected to each other outside the on-load tap changer.

[0010] The device can be constructed in any manner and method, wherein the first end of the first pipe is arranged in the on-load switch container and forms an inflow section; the second end of the second pipe is arranged in the on-load switch container and forms an outflow section.

[0011] The insulating medium enters the insulating medium circuit through the inlet. The insulating medium returns from the insulating medium circuit to the on-load switch container through the outlet.

[0012] The device can be constructed in any manner and method, wherein an oil expansion container is arranged between the first pipeline and the second pipeline in the insulating medium circuit.

[0013] Instead of a direct connection between the first and second pipelines, an oil expansion container can be arranged between the pipelines. This oil expansion container then becomes part of the insulating medium circuit. The oil expansion container is configured to accommodate excess insulating medium when the temperature inside the on-load tap changer rises or falls, and when the volume of the insulating medium from the on-load switch container changes.

[0014] By connecting the two pipelines, an insulating medium loop is formed, in which the insulating medium can circulate.

[0015] The device can be constructed in any manner and method, for example, the inflow portion is arranged in the upper half of the on-load switch container; the outflow portion is arranged in the lower half of the on-load switch container.

[0016] The device can be constructed in any manner and method; for example, the inlet is arranged in the second pipeline between the outlet and the oil expansion container.

[0017] The device can be constructed in any manner and method, for example, a first temperature sensor is arranged in the first pipeline between the inlet and the oil expansion container.

[0018] The device can be constructed in any manner and method; for example, a second temperature sensor is arranged in the second pipeline between the inlet and the oil expansion container.

[0019] The device can be constructed in any manner and method; for example, a heating element can be arranged in the second conduit between the inlet and the outlet. By using the heating element, the insulating medium in the insulating medium circuit can be heated, thereby increasing its flow rate.

[0020] The device can be constructed in any manner and method, wherein the sensor device, the first temperature sensor, the second temperature sensor, and the heating element in the access section are connected to an evaluation device; the evaluation device receives signals from the sensor device, the first temperature sensor, and the second temperature sensor, and processes and evaluates these signals; the evaluation device sends signals to the heating element and controls and adjusts the heating element.

[0021] The evaluation device can receive, evaluate, and process signals from temperature sensors, heating elements, and sensor devices located in the access section, and output control commands based on the received signals and data when necessary. Therefore, it can be determined whether the insulating medium is circulating and how fast it is circulating based on the data from the temperature sensors. When the flow rate slows down, the evaluation device can control and turn on the heating element to increase the temperature of the insulating medium and thereby increase its flow rate. The evaluation device can also evaluate the data received from the sensor devices, provide this data to the user in the cloud, or store and output this data locally on the evaluation device. Attached Figure Description

[0022] The invention and its advantages will be described in more detail below with reference to the accompanying drawings. The drawings are as follows:

[0023] Figure 1 An apparatus for analyzing insulating media is shown;

[0024] Figure 2 An apparatus with a sensor device for analyzing insulating media is shown;

[0025] Figure 3 Another embodiment of the insulating medium circuit is shown, which has components for detecting and increasing the flow velocity of the insulating medium;

[0026] Figure 4 The design of an on-load switch container with an inflow and outflow section is shown. Detailed Implementation

[0027] Figure 1An apparatus 100 for analyzing an insulating medium 101 is shown. This apparatus includes an on-load tap changer 2 disposed within a transformer 1. The on-load tap changer 2 has a selector 8 and an on-load switch 7. The on-load switch 7 is filled with the insulating medium 101. An on-load switch component 7.1 is disposed within the insulating medium 101, and this component performs switching, i.e., opening and closing of the contact points, under load conditions within the on-load tap changer 2. During each operation of the on-load switch contacts of the on-load switch 7 filled with the insulating medium 101, a brief electric arc is generated in the insulating medium 101. This arc, over time, may cause the insulating medium to decompose and produce carbon deposits. Therefore, the on-load switch 7 of the on-load tap changer 2 has an on-load switch container 10 filled with the insulating medium 101, and the on-load switch component 7.1 is disposed within this container. The insulating medium 101 can be, for example, a natural or artificial insulating medium, such as insulating oil or esther. The transformer 1 has a lower side, which is constructed as a bottom component 1.2. In the installed state, this lower side (i.e., the bottom component 1.2) is connected to the ground. Therefore, the transformer 1 is placed on the ground. Furthermore, the transformer 1 also has multiple walls 1.3 and a transformer cover 1.1. The transformer cover 1.1 is arranged opposite to the bottom component 1.2 and therefore opposite to the lower side. In the installed state, the on-load tap changer 2 is fixed to the transformer cover 1.1 of the transformer 1. Thus, the upper half 10.1 of the on-load tap changer container 10 is positioned or arranged close to the transformer cover 1.1 of the transformer 1, and the lower half 10.2 of the on-load tap changer container 10 is positioned or arranged close to the bottom component 1.2 of the transformer 1 and therefore close to the lower side.

[0028] In the installed state, the on-load switch container 10 has a top component 9 that closes the on-load switch container 10. A first conduit 40 and a second conduit 50 are respectively guided through the top component 9. The first end 41 of the first conduit 40 forms an inflow portion 30 for the insulating medium 101. The second end 52 of the second conduit 50 forms an outflow portion 20 through which the insulating medium 101 enters the on-load switch container 10. The first conduit 40 is connected to the oil expansion container 12 at its second end 42. The second conduit 50 is also connected to the oil expansion container 12 at its first end 51. An access portion 13 for extracting a sample of the insulating medium is arranged in the second conduit 50 between the second end 52 and the first end 51. The access portion 13 then has an extraction device 15, which can be configured as a stopcock, ball valve, or other type of access point for the insulating medium 101 and is capable of extracting a sample of the insulating medium 101 from the second conduit 50. After a sample of the insulating medium 101 is extracted, it can be analyzed on-site or in a laboratory. In this embodiment, the on-load tap changer 2 (especially its on-load switch container 10), the first and second pipelines 40 and 50, and the oil expansion container 12 form an insulating medium circuit 5, in which the inlet 13 is arranged. This insulating medium circuit 5 is part of the device 100 for analyzing the insulating medium 101. The specific arrangement of the inlet 30 and the outlet 20 within the on-load switch container 10 will be discussed later. Figure 4 Further explanation is provided below.

[0029] In the insulating medium circuit 5, the insulating medium 101 located within the on-load switch container 10 is circulated. Due to the temperature difference between the inside of the on-load tap changer 2 and the surrounding air, the insulating medium 101 exits the on-load tap changer 2 via the inlet 30 and the top component 9, and enters the first conduit 40 of the insulating medium circuit 5. The first and second conduits 40, 50, as well as the inlet 30 and outlet 20, are pipes or tubes with a diameter of approximately 1 inch. The insulating medium 101 continues through the first conduit 40 into the oil expansion container 12, which is located above the on-load tap changer 2 and the transformer 1. Here, the oil expansion container 12 is located above the transformer cover 1.1, preferably several meters above the transformer cover. The oil expansion container 12 accommodates the volume change of the insulating medium 101 within the on-load switch container 10 as the temperature rises or falls, so that the pressure within the on-load switch container 10 can be kept substantially constant.

[0030] Due to the height difference between the oil expansion container 12 and the inlet 13, the insulating medium 101 falls from the oil expansion container 12 down to the inlet 13 through the second conduit 50. After the insulating medium 101 has passed the inlet 13, it re-enters the on-load tap changer container 10 of the on-load tap changer 2 through the outlet 20 and the second end 52. In the insulating medium circuit 5, the insulating medium 101 circulates based on thermal convection. This is because, ideally, the insulating medium 101 has different temperatures at different locations in the insulating medium circuit 5. Therefore, since the oil expansion container 12 is typically exposed to the surrounding air, the insulating medium 101 inside the on-load tap changer container 10 is always hotter than, for example, the insulating medium inside the oil expansion container 12. The on-load tap changer container 10, and thus the on-load tap changer 2, are also arranged inside the transformer 1. The transformer 1, filled with another insulating medium, has windings on its core that conduct current, in addition to the on-load tap changer 2. This generates heat during operation, causing the temperature of the insulating medium 101 within the on-load tap changer 2 and transformer 1 to be higher than the ambient air temperature. In the accompanying drawings, the flow direction, or circulation direction, of the insulating medium 101 is indicated by arrows along the first conduit 40 and the second conduit 50. Because the insulating medium 101 within the on-load tap changer container 10 is hotter than the insulating medium within the first conduit 40, which is also exposed to the ambient air, a temperature difference is created, resulting in a density difference within the insulating medium 101. This generates static buoyancy, causing the insulating medium 101 to begin circulating. Therefore, the insulating medium 101 flows from the on-load tap changer container 10 through the inlet 30 into the first conduit 40, rises to the oil expansion container 12, and then continues flowing into the second conduit 50 and towards the inlet 13. As the hot insulating medium 101 continuously enters the insulating medium circuit 5 from the on-load switch container 10 and the height difference between the oil expansion container 12 and the inlet section exerts gravitational pressure on the insulating medium 101, the insulating medium 101 re-enters the on-load switch container 10 from the inlet section 13 through the inlet section 20 via the second pipeline 50. Thus, the insulating medium circuit 5 is closed and the insulating medium 101 can circulate on its own.

[0031] In another embodiment, the oil expansion container 12 between the first conduit 40 and the second conduit 50 of the insulating medium circuit 5 can be omitted. The insulating medium 101 then flows directly from the first conduit 40 into the second conduit 50. Instead of the oil expansion container 12, a conduit connector directly connects the second end 42 of the first conduit 40 to the first end 51 of the second conduit 50. The insulating medium 101 then flows directly from the first conduit 40 into the second conduit 50 through this conduit connector. Even without the oil expansion container 12, circulation is formed as long as conduits 40 and 50 are at least partially exposed to the surrounding air.

[0032] In another embodiment, the on-load tap changer 2 can also be a on-load selector. The on-load selector integrates the functions of an on-load switch and a selector in a switching device. This on-load selector also has an on-load switch container 10, within which a corresponding on-load switch is arranged. The on-load switch container 10 is also filled with insulating medium 101 and is part of the insulating medium circuit 5.

[0033] Figure 2 Another embodiment of the insulating dielectric circuit 5 is shown. In this embodiment, a sensor device 16 is arranged within the access portion 13, and the remaining structure of the insulating dielectric circuit 5 is the same as... Figure 1 The structure described in the text corresponds to this. Similarly, it is possible that not only the sensor device 16 but also the extraction device 15 are present within the access portion 13. In this embodiment, the access portion 13 may also be constructed as a stopcock, ball valve, or similar structure, in which the sensor device 16 can be installed or connected. The sensor device 16 can be installed in the access portion 13 by pushing, snapping, or inserting. Preferably, the access portion has a receiving portion corresponding to the sensor device 16 and enabling the sensor device 16 to be installed in or connected to the insulating medium circuit 5.

[0034] The sensor device 16 is configured to acquire, process, and / or evaluate, or output characteristic parameters of the insulating medium 101. Here, the sensor device 16 may be, for example, a sensor for analyzing dissolved gases, capable of detecting specific dissolved gases or contaminants in the insulating medium 101. Furthermore, the sensor device 16 can detect the temperature or humidity of the insulating medium 101. The sensor device 16 is connected to the evaluation device 14 via a third connection 14.3. The evaluation device is capable of processing, evaluating, and / or outputting the results and values ​​determined by the sensor device 16. The third connection 14.3, or the connection between the sensor device 16 and the evaluation device 14, can be implemented wirelessly or via a wired connection.

[0035] Figure 3Another embodiment of the apparatus 100 for analyzing insulating medium 101 is shown, which has additional components arranged in the insulating medium circuit 5 or on the first conduit 40 and / or the second conduit 50. In this embodiment, the first conduit 40 of the insulating medium circuit 5 has a first temperature sensor 21 and a protective relay 24, or rather, the temperature sensor 21 and the protective relay 24 are arranged in the first conduit 40. The first temperature sensor 21 is configured to detect the temperature of the insulating medium 101 flowing through the first conduit 40 of the insulating medium circuit 5. The protective relay 24 is used to protect the on-load tap changer 2 and the transformer 1 in the event of a fault. The protective relay is triggered when a predetermined oil flow rate in the first conduit 40 between the on-load tap changer 2 and the oil expansion vessel 12 is exceeded. In this embodiment, the second conduit 50 is divided into a first section 50.1 and a second section 50.2. Here, the first section 50.1 extends from the oil expansion container 12 to the inlet 13, and the second section 50.2 extends from the inlet 13 to the outlet 20 into the on-load switch container 10. In this embodiment, the second conduit 50 has a cooling element 19 in the first section 50.1, which extends along the conduit in this section and is configured to cool the insulating medium 101 exiting from the oil expansion container 12. The cooling element 19 for cooling the insulating medium 101 of the second conduit 50 can be configured, for example, as a heat sink or as a shield to prevent direct sunlight.

[0036] Cooling of the insulating medium 101 results in heat, or thermal energy, being removed from it, causing it to enter the oil expansion container 12 and reach the inlet 13 more quickly, as the cooler insulating medium 101 sinks towards the inlet 13. A flow meter 32 and a second temperature sensor 31 are also arranged in the first section 50.1 of the second conduit 50. The flow meter 32 is configured to detect the flow velocity of the insulating medium 101 in the first section 50.1 to determine whether convection or circulation has occurred. The second temperature sensor 31 is configured to detect the temperature of the insulating medium 101 flowing through the first section 50.1 of the second conduit 50 in the insulating medium loop 5. In this embodiment, a heating element 18 is arranged in the second section 50.2 of the second conduit 50, downstream of the inlet 13. The heating element 18 is configured to heat the insulating medium 101 in the second section 50.2 of the second conduit 50. This increases the flow rate of the insulating medium 101 and thus accelerates its circulation, allowing it to return more quickly to the on-load switch container 10 via the outlet 20. In this embodiment, the second section 50.2 of the second conduit 50 of the insulating medium circuit 5 may also have an isolation section 17 on the second conduit 50. This prevents the insulating medium 101 in the second section 50.2 from cooling down and losing its flow rate after being heated by the heating element 18. In this embodiment, in addition to the sensor device 16 arranged in the inlet 13, the first temperature sensor 21, the second temperature sensor 31, the flow meter 32, and the heating element 18 are connected to the evaluation device 14. For this purpose, the evaluation device 14 has a first connection 14.1 between the first temperature sensor 21 and the evaluation device 14, and a second connection 14.2 between the second temperature sensor 31 and the evaluation device 14. The heating element 18 is also connected to the evaluation device 14 via a fourth connection 14.4. The flow meter 32 is connected to the evaluation device 14 via a fifth connection 14.5. These connections can be wireless or wired, allowing for the exchange of data and information, or the control, connection, or disconnection of various components. The evaluation device 14 is configured to collect and compare the temperatures of the insulating medium 101 detected by the first temperature sensor 21 and the second temperature sensor 31, and to determine the temperature difference between the two detected values. This allows the determination of the flow rate of the insulating medium 101, or whether the insulating medium 101 is circulating. In cases of reduced flow rate (determined by the flow meter 32 or by the temperature difference detected by the temperature sensors 21 and 31), the evaluation device 14 can control and activate the heating element 18 to accelerate the flow or circulation of the insulating medium 101 within the second section 50.2 of the second conduit 50.

[0037] Figure 4 A schematic diagram is shown of an on-load tap changer 2 together with an on-load switch container 10, an inlet 30, and an outlet 20, or in other words, the first end 41 of the first conduit 40 and the second end 52 of the second conduit 50. The on-load tap changer 2 is connected to, or fixed to, the transformer cover 1.1 of the transformer 1. Below the on-load switch container 10, a selector 8 is arranged inside the transformer 1. An on-load switch component 7.1 is located within the on-load switch container 10, arranged in an insulating medium 101. The on-load switch container 10 is closed by a top component 9, which is constructed like a lid. The top component 9 has openings for the first end 41 of the first conduit 40 and the second end 52 of the second conduit 50, and thus has an inlet 30 and an outlet 20. Here, the first end 41 of the first conduit 40 forms the inlet 30, and the second end 52 of the second conduit 50 forms the outlet 20. An outflow section 20 and an inflow section 30, each constructed from a separate conduit, extend from the outside (i.e., from the outside of the on-load tap changer 2 and thus from the outside of the transformer 1) into its interior. The outflow section 20 is arranged in the lower half 10.2 of the on-load switch container 10 within the bottom region 10.3 of the on-load switch container 10. This means that the second end 52 of the second conduit 50 is closer to the bottom region 10.3 of the on-load switch container 10 and the bottom component 1.2 of the transformer 1 than to the transformer cover 1.1 and thus the top component 9 of the on-load tap changer 2. The inflow section 30 is arranged in the upper half 10.1 of the on-load switch container 10. This means that the first end 41 of the first conduit 40 is closer to the upper part 10.1 of the transformer 1, i.e., the transformer cover 1.1, than to the bottom component 1.2 of the transformer 1 and the bottom region 10.3 of the on-load switch container 10. Therefore, the depth to which the inflow section 30, or the first end 41 of the first conduit 40, extends into the on-load tap changer container 10 is less than the depth to which the outflow section 20, or the second end 52 of the second conduit 50, extends into the on-load tap changer container. This results in the hot insulating medium 101 in the upper part or upper half 10.1 of the on-load tap changer container 10 being extracted and entering the insulating medium circuit 5, while the cooler insulating medium 101 at the end of the insulating medium circuit 5 is guided to the lower part or lower half 10.2 of the on-load tap changer container 10. Thus, as time progresses, all the insulating medium 101 of the on-load tap changer 2 enters the insulating medium circuit 5 and passes through the access section 13 with or without the sensor device 16.

[0038] List of reference numerals in the attached diagram:

[0039] 1 Transformer

[0040] 1.1 Transformer Cover

[0041] 1.2 Bottom Components

[0042] 2 On-load tap changer

[0043] 5. Insulating dielectric circuit

[0044] 7 On-load switch

[0045] 7.1 On-load switching unit

[0046] 8 selectors

[0047] 9 Top Components

[0048] 10 On-load switch container

[0049] 10.1 Upper half of the on-load switch container

[0050] 10.2 Lower half of the on-load switch container

[0051] 10.3 Bottom area of ​​on-load switch container

[0052] 12 Oil Expansion Container

[0053] 13 Access Section

[0054] 14 Evaluation Devices

[0055] 14.1 First Connection

[0056] 14.2 Second Connection

[0057] 14.3 Third Connection

[0058] 14.4 Fourth Connection

[0059] 14.5 Fifth Connection

[0060] 15 Extraction Device

[0061] 16 sensor devices

[0062] 17 Isolation Department

[0063] 18 heating elements

[0064] 19 Cooling Components

[0065] 20 outflow department

[0066] 21 First Temperature Sensor

[0067] 24 protection relays

[0068] 30 Inflow Section

[0069] 31 Second Temperature Sensor

[0070] 32 Flow Meter

[0071] 40 First Pipeline

[0072] 41 First end of the first pipeline

[0073] 42 The second end of the first pipeline

[0074] 50 Second Pipeline

[0075] 50.1 First section of the second pipeline

[0076] 50.2 Second section of the second pipeline

[0077] 51 The first end of the second pipeline

[0078] 52 Second end of the second pipeline

[0079] 100 Equipment for analyzing insulating media

[0080] 101 Insulating Medium

Claims

1. An apparatus (100) for analyzing an insulating medium (101), the apparatus comprising: On-load tap changer (2) with on-load switch container (10); First pipeline (40) and second pipeline (50); Access unit (13); The on-load switch container (10), the first pipeline (40) and the second pipeline (50) form an insulating medium circuit (5), and the access part (13) is arranged in the insulating medium circuit (5); The insulating medium (101) circulates within the insulating medium circuit (5) by means of thermal convection; The analysis of the insulating medium (101) can be performed locally by means of a sensor device (16) arranged in the access section (13), or externally after the insulating medium (101) has been extracted by means of the access section (13).

2. The apparatus (100) for analyzing insulating media (101) according to claim 1, wherein, The first end (41) of the first pipeline (40) is arranged in the on-load switch container (10) and forms an inflow section (30). The second end (52) of the second conduit (50) is arranged in the on-load switch container (10) and forms an outlet (20).

3. The apparatus (100) for analyzing an insulating medium (101) according to any one of claims 1 to 2, wherein, An oil expansion container (12) is arranged between the first pipeline (40) and the second pipeline (50) in the insulating medium circuit (5).

4. The apparatus (100) for analyzing an insulating medium (101) according to claim 3, wherein, The second end (42) of the first pipeline (50) is connected to the oil expansion container (12), and The first end (51) of the second pipeline (50) is connected to the oil expansion container (12).

5. The apparatus (100) for analyzing an insulating medium (101) according to any one of claims 2 to 4, wherein, The inflow section (30) is arranged in the upper half (10.1) of the on-load switch container (10); The outflow section (20) is arranged in the lower half (10.2) of the on-load switch container (10).

6. The apparatus (100) for analyzing an insulating medium (101) according to any one of claims 1 to 5, wherein, The access section (13) is arranged in the second pipeline (50).

7. The apparatus (100) for analyzing an insulating medium (101) according to any one of claims 1 to 6, wherein, A first temperature sensor (21) is provided, and The first temperature sensor (21) is arranged in the first pipeline (40).

8. The apparatus (100) for analyzing an insulating medium (101) according to any one of claims 1 to 7, wherein, A second temperature sensor (31) is provided. The second temperature sensor (31) is arranged in the second pipeline (50).

9. The apparatus (100) for analyzing an insulating medium (101) according to any one of claims 1 to 8, wherein, A heating element (18) is provided; The heating element (18) is arranged in the second conduit (50).

10. The apparatus (100) for analyzing an insulating medium (101) according to any one of claims 1 to 9, wherein, An evaluation device (14) is provided. The sensor device (16), the first temperature sensor (21), the second temperature sensor (31), and the heating element (18) in the access unit (16) are connected to the evaluation device (14); The evaluation device (14) receives signals from the sensor device (16), the first temperature sensor (21) and the second temperature sensor (31), and processes and evaluates the signals; The evaluation device (14) sends the signal to the heating element (18) after processing and evaluation, and controls and adjusts the heating element.

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