An online monitoring device for insulation status of ring main unit

Abstract

The ring network cabinet insulation state online monitoring device provided in the embodiment of the present application includes an embedded processing chip, a detection module, a monitoring module, a communication module and a memory module. The detection module includes a first sensor module. The first sensor module includes a first characteristic gas sensor, a first temperature sensor and a first humidity sensor. The first characteristic gas sensor, the first temperature sensor, the first humidity sensor, the monitoring module, the communication module and the memory module are all connected to the embedded processing chip. The detection module simultaneously detects the characteristic gas, temperature and humidity in the ring network cabinet, and the monitoring module monitors the set position in the ring network cabinet, and takes a snapshot or video records the set position in the ring network cabinet when the ring network cabinet is abnormal, thereby improving the monitoring effect of the insulation state of the ring network cabinet. The embedded processing chip uploads the data of the detection module and the monitoring module through the communication module, thereby improving the real-time monitoring of the insulation state of the ring network cabinet.

Description

Technical Field

[0001] The present application relates to the field of ring main unit, and in particular to an online monitoring device for the insulation status of a ring main unit. Background Art

[0002] The ring main unit is a group of electrical equipment installed in a metal or non-metallic insulating cabinet or made into an assembled interval ring main unit. It is an important part of the power system. The ring main unit is generally placed outdoors in a complex and changeable environment. When the ring main unit is in an environment with large temperature difference and high humidity, condensation is easy to form inside the ring main unit. Condensation will reduce the insulation performance of the ring main unit, causing partial discharge of the ring main unit. Long-term partial discharge will cause the insulation material of the ring main unit to decompose due to severe aging, which will cause insulation failure of the ring main unit. Insulation failure of the ring main unit will directly affect the power equipment adjacent to the ring main unit, resulting in obstruction of power use for a large area of ​​users, affecting the safe and stable operation of the entire power system, and may even cause fires and major accidents.

[0003] In order to prevent the insulation failure of the ring main unit from affecting the safe and stable operation of the power system, condensation is easily formed inside the ring main unit when the ring main unit is in an environment with large temperature difference and high humidity, which may easily cause insulation failure of the ring main unit. Therefore, the prior art indirectly monitors the insulation status of the ring main unit by monitoring the temperature and humidity inside the ring main unit.

[0004] However, the above-mentioned prior art only monitors temperature and humidity, and the monitoring effect of the insulation state of the ring main unit is relatively poor. Summary of the invention

[0005] The present application provides an online monitoring device for the insulation status of a ring main unit to solve the technical problem that the monitoring effect of the insulation status of the ring main unit is poor when only the temperature and humidity are monitored.

[0006] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0007] In a first aspect, an embodiment of the present application discloses an online monitoring device for the insulation status of a ring main unit, including an embedded processing chip, a detection module, a monitoring module, a communication module and a memory module, wherein the detection module includes a first sensor module, and the first sensor module includes a first characteristic gas sensor, a first temperature sensor and a first humidity sensor, wherein:

[0008] The first characteristic gas sensor, the first temperature sensor, the first humidity sensor, the monitoring module, the communication module and the memory module are all connected to the embedded processing chip.

[0009] Optionally, the first characteristic gas sensor is an electrochemical sensor for monitoring the concentration of carbon monoxide.

[0010] Optionally, the monitoring module includes a camera module, the camera module has a length of 10 mm, a width of 10 mm, and a height of 10 mm, and the camera module includes a high-definition camera, an infrared LED light, and a flash light, and the high-definition camera, infrared LED light, and flash light are all connected to the embedded processing chip.

[0011] Optionally, a server is also included, and the embedded processing chip is communicatively connected to the server via a communication module.

[0012] Optional communication modules include:

[0013] 4G module, used to convert serial port data into network data and upload it to the server;

[0014] WIFI module, used to convert serial port data into network data and upload it to the server;

[0015] Both the 4G module and the WIFI module are connected to the embedded processing chip. The maximum downlink rate of LTE-FDD is 200Mbps, the maximum uplink rate is 75Mbps, the maximum downlink rate of LTE-TDD is 130Mbps, and the maximum uplink rate is 35Mbps. The 4G module supports transparent data transmission, TCP / UDP protocol, heartbeat packet and registration packet functions.

[0016] Optional memory modules include:

[0017] Flash module, used to store image and video data;

[0018] TF memory card module, used to store pictures and video data;

[0019] The Flash module and the TF memory card module are both connected to the embedded processing chip. The storage space of the Flash module is 64M, and the storage space of the TF memory card module is 8-64GB.

[0020] Optionally, it also includes a second sensor module and a third sensor module, the second sensor module includes a second characteristic gas sensor for monitoring the concentration of hydrogen, a second temperature sensor and a second humidity sensor, the third sensor module includes a third characteristic gas sensor for monitoring the concentration of total hydrocarbons, a third temperature sensor and a third humidity sensor, the second characteristic gas sensor, the second temperature sensor, the second humidity sensor, the third characteristic gas sensor, the third temperature sensor and the third humidity sensor are all connected to the embedded processing chip.

[0021] Optionally, the first characteristic gas sensor is a temperature compensated characteristic gas sensor, the temperature compensation range of the temperature compensated characteristic gas sensor is -40°C to +70°C, the measurement range is 0-1000ppm, the resolution is 0.1ppm, the error is ±3%, and the length of the temperature compensated characteristic gas sensor is 10mm, the width is 10mm, and the height is 6.5mm.

[0022] Optionally, the measurement range of the first temperature sensor is -40°C-125°C, the resolution is 0.1°C, and the error is ±0.2°C.

[0023] Optionally, the first humidity sensor has a measurement range of 0-100%, a resolution of 0.1%, and an error of ±2%.

[0024] The beneficial effects of this application are:

[0025] The ring network cabinet insulation state online monitoring device provided by the embodiment of the present application includes an embedded processing chip, a detection module, a monitoring module, a communication module and a memory module, wherein the detection module includes a first sensor module, the first sensor module includes a first characteristic gas sensor, a first temperature sensor and a first humidity sensor, and the first characteristic gas sensor, the first temperature sensor, the first humidity sensor, the monitoring module, the communication module and the memory module are all connected to the embedded processing chip. The characteristic gas, temperature and humidity in the ring network cabinet are detected by the detection module at the same time, and the set position in the ring network cabinet is monitored by the monitoring module, and the set position in the ring network cabinet is captured or video recorded when the ring network cabinet is abnormal, thereby improving the monitoring effect of the insulation state of the ring network cabinet. The embedded processing chip uploads the data of the detection module and the monitoring module through the communication module, thereby improving the real-time monitoring of the insulation state of the ring network cabinet. The pictures captured or the recorded videos of the monitoring module are recorded and stored through the memory module, so that it is convenient to retrieve when it is necessary to view the pictures captured or the recorded videos of the monitoring module.

[0026] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 A schematic diagram of the structure of an online monitoring device for the insulation status of a ring main unit provided in an embodiment of the present application;

[0029] in:

[0030] 1-embedded processing chip, 2-detection module, 21-first sensor module, 211-first characteristic gas sensor, 212-first temperature sensor, 213-first humidity sensor, 22-second sensor module, 221-second characteristic gas sensor, 222-second temperature sensor, 223-second humidity sensor, 23-third sensor module, 231-third characteristic gas sensor, 232-third temperature sensor, 233-third humidity sensor, 3-monitoring module, 4-communication module, 5-memory module, 6-server. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0032] See also Figure 1 An embodiment of the present application provides an online monitoring device for the insulation status of a ring main unit, including an embedded processing chip 1, a detection module 2, a monitoring module 3, a communication module 4 and a memory module 5. The detection module 2 includes a first sensor module 21, and the first sensor module 21 includes a first characteristic gas sensor 211, a first temperature sensor 212 and a first humidity sensor 213. The first characteristic gas sensor 211, the first temperature sensor 212, the first humidity sensor 213, the monitoring module 3, the communication module 4 and the memory module 5 are all connected to the embedded processing chip 1.

[0033] In some embodiments, the first characteristic gas sensor 211 is an electrochemical sensor for monitoring the concentration of carbon monoxide.

[0034] In some embodiments, when the humidity in the ring main unit is higher than 80%, the hydrogen concentration will be significantly higher, and when the temperature in the ring main unit is higher than 30° C., the carbon monoxide concentration will be significantly higher.

[0035] In some embodiments, when the temperature in the ring network cabinet is not higher than 30°C and the humidity is not higher than 80%, the total hydrocarbon concentration is lower than the hydrogen concentration, the total hydrocarbon concentration is lower than the carbon monoxide concentration, the hydrogen and carbon monoxide concentrations are similar, and the carbon monoxide concentration is not higher than 30ppm, the ring network cabinet has local discharge and the insulation of the ring network cabinet is not damaged; when the hydrogen concentration is higher than the carbon monoxide concentration, the hydrogen concentration is higher than the total hydrocarbon concentration, and the carbon monoxide concentration is not higher than 50ppm, the ring network cabinet has local discharge and the insulation of the ring network cabinet is slightly damaged; when the total hydrocarbon concentration is higher than the hydrogen concentration, the hydrogen concentration is higher than the carbon monoxide concentration, and the carbon monoxide concentration is higher than 50ppm, the ring network cabinet has local discharge and the insulation of the ring network cabinet is seriously damaged.

[0036] The characteristic gas, temperature and humidity in the ring network cabinet are detected simultaneously through the detection module 2. The degree of insulation fault is judged according to the relationship between the monitored concentrations of carbon monoxide, hydrogen and total hydrocarbons. The temperature and humidity of the ring network cabinet are combined with the judgment result of the degree of insulation fault obtained according to the relationship between the characteristic gas concentrations to judge the insulation state of the ring network cabinet, thereby improving the monitoring effect of the insulation state of the ring network cabinet.

[0037] In some embodiments, the monitoring module 3 includes a camera module, the length of the camera module is 10 mm, the width is 10 mm, and the height is 10 mm. The camera module includes a high-definition camera, an infrared LED light, and a flash light. The high-definition camera, infrared LED light, and flash light are all connected to the embedded processing chip 1.

[0038] Since the light inside the ring main unit is dim, in order to clearly monitor the set position inside the ring main unit when necessary,

[0039] After the embedded processing chip 1 receives the monitoring start-up signal, the embedded processing chip 1 sends a signal to turn on the infrared LED light or a signal to turn on the flash light to the camera module. After the camera module turns on the infrared LED light or turns on the flash light, it sends a start-up success signal to the embedded processing chip 1. The embedded processing chip 1 sends a signal to turn on the high-definition camera. The camera module turns on the high-definition camera to monitor the set position in the ring network cabinet. Among them, turning on the infrared LED light can increase the brightness inside the ring network cabinet, and turning on the flash light can provide fill light when the brightness is insufficient.

[0040] The temperature and humidity of the ring main unit are combined with the degree judgment result of the insulation fault obtained according to the characteristic gas concentration relationship to judge the insulation state of the ring main unit. However, when the judgment result is that the ring main unit is abnormal, in order to capture or record video of the set position (abnormal position) in the ring main unit, after the embedded processing chip 1 receives the abnormal signal, the embedded processing chip 1 sends a signal to turn on the infrared LED light or a signal to turn on the flash to the camera module. After the camera module turns on the infrared LED light or turns on the flash, it sends a start-up success signal to the embedded processing chip 1. The embedded processing chip 1 sends a signal to turn on the high-definition camera and a capture signal or a video recording signal. The camera module turns on the high-definition camera to capture or record video of the set position (abnormal position) in the ring main unit. Among them, turning on the infrared LED light can increase the brightness in the ring main unit, and turning on the flash can provide fill light when the brightness is insufficient.

[0041] In some embodiments, a server 6 is further included, and the embedded processing chip 1 is communicatively connected to the server 6 via the communication module 4 .

[0042] The embedded processing chip 1 uploads the data detected by the detection module 2 and the photos and videos captured by the monitoring module 3 to the server 6 through the communication module 4. The data detected by the detection module 2 and the photos and videos captured by the monitoring module 3 can be viewed in real time through the display device corresponding to the server 6, thereby improving the real-time monitoring of the insulation status of the ring network cabinet.

[0043] In some embodiments, the communication module 4 includes:

[0044] 4G module, used to convert serial port data into network data and upload it to server 6;

[0045] WIFI module, used to convert serial port data into network data and upload it to server 6;

[0046] Both the 4G module and the WIFI module are connected to the embedded processing chip 1. The maximum downlink rate of LTE-FDD is 200Mbps, the maximum uplink rate is 75Mbps, the maximum downlink rate of LTE-TDD is 130Mbps, and the maximum uplink rate is 35Mbps. The 4G module supports transparent data transmission, TCP / UDP protocol, heartbeat packet and registration packet functions.

[0047] The embedded processing chip 1 is connected to the 4G module via the UART5 interface for data transmission, and the embedded processing chip 1 is connected to the WIFI module via the UART4 interface for data transmission.

[0048] In some embodiments, when the ring main unit insulation status online monitoring device provided in the embodiment of the present application adds a module that requires network transmission data, the WIFI module can be used as a wireless access device to provide a network for the added module for network transmission data.

[0049] In some embodiments, the memory module 5 includes:

[0050] Flash module, used to store image and video data;

[0051] TF memory card module, used to store pictures and video data;

[0052] The Flash module and the TF memory card module are both connected to the embedded processing chip 1 , the storage space of the Flash module is 64M, and the storage space of the TF memory card module is 8-64GB.

[0053] The monitoring module 3 is connected to the embedded processing chip 1 through the GPIO interface, and the captured pictures or recorded videos are sent to the embedded processing chip 1 through the GPIO interface. The embedded processing chip 1 is connected to the memory module 5 through the SPI or SDIO interface, and the embedded processing chip 1 stores the captured pictures or recorded videos of the monitoring module 3 in the memory module 5 through the SPI or SDIO interface. The pictures or recorded videos captured by the monitoring module 3 are recorded and stored through the memory module 5, so as to realize the recording of the historical data of monitoring. When it is necessary to view the pictures or recorded videos captured by the monitoring module 3 through the display device corresponding to the server 6, it is convenient to retrieve.

[0054] In some embodiments, a second sensor module 22 and a third sensor module 23 are also included. The second sensor module 22 includes a second characteristic gas sensor 221 for monitoring the concentration of hydrogen, a second temperature sensor 222 and a second humidity sensor 223. The third sensor module 23 includes a third characteristic gas sensor 231 for monitoring the concentration of total hydrocarbons, a third temperature sensor 232 and a third humidity sensor 233. The second characteristic gas sensor 221, the second temperature sensor 222, the second humidity sensor 223, the third characteristic gas sensor 231, the third temperature sensor 232 and the third humidity sensor 233 are all connected to the embedded processing chip 1.

[0055] The embedded processing chip 1 is connected to the first sensor module 21, the second sensor module 22 and the third sensor module 23 at the same time, and the first sensor module 21, the second sensor module 22 and the third sensor module 23 all include characteristic gas sensors, temperature sensors and humidity sensors, which can perform three-dimensional detection on three different positions of the ring network cabinet, thereby improving the monitoring effect of the insulation status of the ring network cabinet.

[0056] The embedded processing chip 1 is connected to the first sensor module 21 through the USART1 interface for data transmission, the embedded processing chip 1 is connected to the second sensor module 22 through the USART2 interface for data transmission, and the embedded processing chip 1 is connected to the third sensor module 23 through the USART3 interface for data transmission.

[0057] In some embodiments, the second characteristic gas sensor 221, the third characteristic gas sensor 231 and the first characteristic gas sensor 211 are all temperature compensated characteristic gas sensors. The temperature compensation range of the temperature compensated characteristic gas sensor is -40°C to +70°C, the measurement range is 0-1000ppm, the resolution is 0.1ppm, the error is ±3%, and the length of the temperature compensated characteristic gas sensor is 10mm, the width is 10mm, and the height is 6.5mm.

[0058] In some embodiments, the measurement ranges of the second temperature sensor 222 , the third temperature sensor 232 , and the first temperature sensor 212 are all -40°C-125°C, the resolutions are all 0.1°C, and the errors are all ±0.2°C.

[0059] In some embodiments, the measurement ranges of the second humidity sensor 223 , the third humidity sensor 233 , and the first humidity sensor 213 are all 0-100%, the resolutions are all 0.1%, and the errors are all ±2%.

[0060] An installation method of an online monitoring device for the insulation status of a ring main unit provided in an embodiment of the present application:

[0061] Power outage installation:

[0062] Fix the online monitoring device for the insulation status of the ring main unit on the side wall of the cable room of the ring main unit near the top plate of the cable room, and adjust the shooting angle of the camera in the monitoring module 3. The online monitoring device for the insulation status of the ring main unit is powered by a power adapter. The inlet end of the power adapter is connected to the outlet of the AC220V switch in the instrument room of the ring main unit, and the DC outlet end of the power adapter is inserted into the power socket of the monitoring device. The power adapter wire is introduced from the instrument room into the cable room along the secondary wire threading hole in the ring main unit.

[0063] Live installation:

[0064] The characteristic gas sensor and camera module in the ring main unit insulation status online monitoring device can be installed separately from the device body by adding wiring. Fix the ring main unit insulation status online monitoring device in the mechanism room, then insert the characteristic gas sensor and camera module into the cable room through the secondary wire threading hole, and adjust the installation angle. After the ring main unit insulation status online monitoring device is installed, take photos of the on-site installation and record the installation location information and other related information, and upload the recorded information to the server.

[0065] As can be seen from the above embodiments, the ring network cabinet insulation state online monitoring device provided by the embodiment of the present application includes an embedded processing chip, a detection module, a monitoring module, a communication module and a memory module, the detection module includes a first sensor module, the first sensor module includes a first characteristic gas sensor, a first temperature sensor and a first humidity sensor, and the first characteristic gas sensor, the first temperature sensor, the first humidity sensor, the monitoring module, the communication module and the memory module are all connected to the embedded processing chip. The ring network cabinet insulation state online monitoring device provided by the present application adopts an integrated design, integrating an embedded processing chip, a detection module, a monitoring module, a communication module and a memory module in one, which is suitable for ring network cabinets of various structures, greatly reducing the difficulty of on-site installation and debugging, and having high stable and reliable operation. The characteristic gas, temperature and humidity in the ring network cabinet are detected by the detection module at the same time, the position set in the ring network cabinet is monitored by the monitoring module, and the position set in the ring network cabinet is captured or video recorded when the ring network cabinet is abnormal, reducing the number of on-site inspections by the operation and maintenance personnel, and can achieve non-essential maintenance without maintenance, reducing the manual operation and maintenance cost of the ring network cabinet, and improving the monitoring effect of the insulation state of the ring network cabinet. The embedded processing chip uploads the data of the detection module and the monitoring module through the communication module, which improves the real-time monitoring of the insulation status of the ring network cabinet. The pictures captured or videos recorded by the monitoring module are recorded and stored through the memory module, which is convenient for retrieval when it is necessary to view the pictures captured or videos recorded by the monitoring module.

[0066] Since the above embodiments are all described by citing and combining with other embodiments, different embodiments have the same parts, and the same and similar parts between the embodiments in this specification can be referred to each other. No further detailed description is given here.

[0067] It should be noted that, in this specification, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a circuit structure, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such circuit structure, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the circuit structure, article or device including the element.

[0068] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the disclosure of the invention herein. The present application is intended to cover any modification, use or adaptation of the present invention, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the content of the claims. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. An online monitoring device for the insulation status of a ring main unit, characterized in that: include: An embedded processing chip (1), a detection module (2), a monitoring module (3), a communication module (4) and a memory module (5), wherein the detection module (2) comprises a first sensor module (21), the first sensor module (21) comprises a first characteristic gas sensor (211), a first temperature sensor (212) and a first humidity sensor (213), wherein: The first characteristic gas sensor (211) is used to monitor the concentration of carbon monoxide; The first characteristic gas sensor (211), the first temperature sensor (212), the first humidity sensor (213), the monitoring module (3), the communication module (4) and the memory module (5) are all connected to the embedded processing chip (1); The system further comprises a second sensor module (22) and a third sensor module (23), wherein the second sensor module (22) comprises a second characteristic gas sensor (221), a second temperature sensor (222) and a second humidity sensor (223), wherein the second characteristic gas sensor (221) is used to monitor the concentration of hydrogen, and the third sensor module (23) comprises a third characteristic gas sensor (231), a third temperature sensor (232) and a third humidity sensor (233), wherein the third characteristic gas sensor (231) is used to monitor the concentration of total hydrocarbons, and the second characteristic gas sensor (221), the second temperature sensor (222), the second humidity sensor (223), the third characteristic gas sensor (231), the third temperature sensor (232) and the third humidity sensor (233) are all connected to the embedded processing chip (1); Among them, when the temperature in the ring network cabinet is not higher than 30℃ and the humidity is not higher than 80%, the total hydrocarbon concentration is lower than the hydrogen concentration and carbon monoxide concentration, the hydrogen concentration and carbon monoxide concentration are similar, and the carbon monoxide concentration is not higher than 30ppm, there is local discharge in the ring network cabinet and the insulation of the ring network cabinet is not damaged; when the hydrogen concentration is higher than the carbon monoxide concentration and the total hydrocarbon concentration, and the carbon monoxide concentration is not higher than 50ppm, there is local discharge in the ring network cabinet and the insulation of the ring network cabinet is slightly damaged; when the total hydrocarbon concentration is higher than the hydrogen concentration, the hydrogen concentration is higher than the carbon monoxide concentration, and the carbon monoxide concentration is higher than 50ppm, there is local discharge in the ring network cabinet and the insulation of the ring network cabinet is seriously damaged.

2. The on-line monitoring device for insulation status of a ring main unit according to claim 1 is characterized in that: The first characteristic gas sensor (211) is an electrochemical sensor.

3. The on-line monitoring device for insulation status of a ring main unit according to claim 1 is characterized in that: The monitoring module (3) comprises a camera module, the camera module has a length of 10 mm, a width of 10 mm and a height of 10 mm, the camera module comprises a high-definition camera, an infrared LED light and a flash light, and the high-definition camera, the infrared LED light and the flash light are all connected to the embedded processing chip (1).

4. The on-line monitoring device for insulation status of a ring main unit according to claim 1, characterized in that: It also includes a server (6), and the embedded processing chip (1) is communicatively connected to the server (6) via the communication module (4).

5. The on-line monitoring device for insulation status of a ring main unit according to claim 4 is characterized in that: The communication module (4) comprises: 4G module, used to convert serial port data into network data and upload it to the server (6); WIFI module, used to convert serial port data into network data and upload it to the server (6); The 4G module and the WIFI module are both connected to the embedded processing chip (1); the maximum downlink rate of LTE-FDD is 200 Mbps, the maximum uplink rate is 75 Mbps; the maximum downlink rate of LTE-TDD is 130 Mbps, the maximum uplink rate is 35 Mbps; the 4G module supports transparent data transmission, TCP / UDP protocol, and heartbeat packet and registration packet functions.

6. The on-line monitoring device for insulation status of a ring main unit according to claim 1, characterized in that: The memory module (5) comprises: Flash module, used to store image and video data; TF memory card module, used to store pictures and video data; The Flash module and the TF memory card module are both connected to the embedded processing chip (1); the storage space of the Flash module is 64M, and the storage space of the TF memory card module is 8-64GB.

7. The on-line monitoring device for insulation status of a ring main unit according to claim 1, characterized in that: The first characteristic gas sensor (211) is a temperature compensated characteristic gas sensor, the temperature compensation range of the temperature compensated characteristic gas sensor is -40°C to +70°C, the measurement range is 0-1000ppm, the resolution is 0.1ppm, the error is ±3%, and the length of the temperature compensated characteristic gas sensor is 10mm, the width is 10mm, and the height is 6.5mm.

8. The on-line monitoring device for insulation status of a ring main unit according to claim 1, characterized in that: The measurement range of the first temperature sensor (212) is -40°C-125°C, the resolution is 0.1°C, and the error is ±0.2°C.

9. The on-line monitoring device for insulation status of a ring main unit according to claim 1, characterized in that: The measurement range of the first humidity sensor (213) is 0-100%, the resolution is 0.1%, and the error is ±2%.

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