Transformer monitoring system and transformer

Abstract

The utility model discloses a transformer monitoring system and a transformer, relates to the transformer technical field, the transformer monitoring system comprises a pressure relief valve and a monitoring device, the pressure relief valve is installed on the oil tank of the transformer, the pressure relief valve is provided with a cavity communicated with the oil tank, a pressure sensor communicated with the cavity is mounted on the pressure relief valve; the monitoring device comprises a main body, an acquisition card and a display screen electrically connected with the acquisition card; the main body is detachably installed on the oil tank and avoids the position of the pressure relief valve, an installation space is defined by the main body, the acquisition card is installed in the installation space, a wire harness channel is formed in the main body, a wire harness connecting the acquisition card and the pressure sensor penetrates through the wire harness channel, and the display screen is arranged on the side, away from the oil tank, of the main body. Compared with a traditional pressure relief valve, the transformer monitoring system acquires the pressure condition of the oil tank through the pressure sensor and analyzes the pressure through the acquisition card, the pressure condition of the oil tank can be mastered in time, and the transformer monitoring system is more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field especially relates to a transformer monitoring system and transformer. BACKGROUND

[0002] In the application of transformer, especially oil-immersed transformer, usually need to match pressure release valve to be used as the safety device of protecting electrical equipment such as transformer, can avoid the deformation or burst of transformer oil tank. When the accident occurs in oil-immersed transformer, the oil in oil tank is gasified, a large amount of gas is produced, the pressure inside oil tank rises sharply, when the pressure in oil tank rises to the opening pressure of pressure release valve, pressure release valve opens rapidly, the pressure in oil tank is reduced rapidly, thereby playing the role of protecting transformer oil tank.

[0003] However, the conventional pressure release valve completely relies on its mechanical structure, utilizes the corresponding action of internal spring, does not have the ability of timely predetermining the pressure change condition inside transformer. If the mechanical structure of pressure release valve fails, cannot open in time, leads to the pressure inside oil tank also cannot be released in time, thereby causing serious damage to transformer oil tank, and the reliability is poor. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of transformer monitoring system and transformer, to solve the technical problem that the reliability of only setting pressure release valve on conventional transformer is poor.

[0005] To achieve the above-mentioned purpose, the utility model provides a kind of transformer monitoring system, the transformer monitoring system includes:

[0006] Pressure release valve, the pressure release valve is installed on the oil tank of the transformer, the pressure release valve has a cavity in communication with the oil tank, a pressure sensor in communication with the cavity is installed on the pressure release valve, and the pressure sensor is used to monitor the pressure in the oil tank;

[0007] Monitoring device, the monitoring device includes a main body, a collection card and a display screen electrically connected with the collection card;The main body is detachably installed on the oil tank to avoid the position of the pressure release valve, the main body encloses an installation space, the collection card is installed in the installation space, a wire harness passage in communication with the installation space is formed in the main body, a wire harness connected with the collection card and the pressure sensor is arranged on the wire harness passage, and the display screen is arranged on the side of the main body away from the oil tank.

[0008] In an embodiment, the main body includes:

[0009] A shell is detachably mounted on the oil tank, the shell encloses the mounting space with an opening, the wire harness channel is formed on the shell, and the opening is located on the side of the shell away from the oil tank;

[0010] An upper cover is detachably connected with the shell and closes the opening, and the display screen is mounted on the side of the upper cover away from the shell.

[0011] In an embodiment, the shell comprises a bottom plate and a surrounding plate, the surrounding plate is arranged on the side of the bottom plate away from the oil tank to enclose the mounting space with the bottom plate; the opening is formed on the side of the surrounding plate away from the bottom plate, and the wire harness channel is formed on the surrounding plate;

[0012] The outer side of the surrounding plate away from the mounting space is provided with a connecting lug, the connecting lug is arranged close to the bottom plate, a first screw hole is formed on the connecting lug, a first bolt is arranged through the first screw hole, and the shell is connected with the oil tank through the first bolt.

[0013] In an embodiment, the two opposite outer sides of the surrounding plate are each provided with at least two connecting lugs.

[0014] In an embodiment, a plurality of second screw holes are formed on the side of the surrounding plate facing the upper cover, and the second screw holes are arranged at intervals.

[0015] A third screw hole is formed on the upper cover corresponding to the position of each second screw hole, a second bolt is arranged through the second screw hole and the third screw hole corresponding thereto, so as to fasten the upper cover to the surrounding plate.

[0016] In an embodiment, a heat dissipation gap is formed between the side of the acquisition card facing the bottom plate and the bottom plate, and the wire harness channel is located between the acquisition card and the bottom plate.

[0017] In an embodiment, a plurality of mounting tables are arranged on the inner side of the surrounding plate facing the mounting space, the mounting tables are arranged at intervals along the surrounding direction of the surrounding plate, and the acquisition card is mounted on the side of the mounting tables away from the bottom plate.

[0018] In an embodiment, a sealing groove is formed on the side of the surrounding plate facing the upper cover, the sealing groove is arranged around the opening, and the sealing strip sealing the upper cover and the shell is arranged in the sealing groove.

[0019] In an embodiment, the side of the upper cover away from the shell is recessed to form a mounting groove towards the shell, a wire passing port is formed on the groove bottom of the mounting groove, and the display screen is mounted in the mounting groove and blocks the wire passing port.

[0020] The utility model discloses still provide a transformer, its characterized in that, the transformer application has transformer monitoring system as above.

[0021] The transformer monitoring system of the utility model, through pressure relief valve, can release pressure in time to protect transformer oil tank when the pressure in transformer oil tank is too big, and through setting pressure sensor on pressure relief valve, can monitor the internal pressure of pressure relief valve, thereby obtain the pressure change condition of transformer oil tank, wherein, the monitoring device is provided with the acquisition card that communicates with pressure sensor through wiring harness, both guarantee the stability of data transmission, still can through acquisition card fast analysis the pressure condition that pressure sensor gathers, if pressure relief valve cannot release the pressure in oil tank in time because of breakdown, can take corresponding remedial measures, troubleshoot the fault etc. in time according to the pressure condition in oil tank, thereby prevent the case of oil tank damage caused by the pressure in oil tank is too big, in addition, still can show the pressure condition through display screen, thereby facilitate fast viewing the pressure condition in transformer oil tank, and, through acquisition card can also compare with the pressure threshold value that is set in advance to judge whether need trigger alarm signal, and notify relevant personnel to take countermeasures in time, greatly guarantee the safe operation of pressure sensor. Compared with only setting pressure relief valve on the traditional transformer, this transformer monitoring system also has pressure sensor and monitoring device, can monitor the pressure change condition of transformer oil tank, thereby can discover the problem in time and take measures more reliably under the condition of pressure relief valve breakdown. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will to the drawing needed to use in the embodiment or prior art description simple introduction, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, according to the structure shown in these drawings, other drawings can also be obtained.

[0023] Fig. 1 The structural schematic diagram of the embodiment of the transformer monitoring system provided by the utility model is shown in the figure;

[0024] Fig. 2 The explosion structural schematic diagram of the monitoring device in the embodiment of the transformer monitoring system provided by the utility model is shown in the figure.

[0025] EXPLANATION OF DRAWINGS:

[0026] 100, transformer monitoring system; 1, pressure relief valve; 11, pressure sensor; 12, wiring harness; 2, monitoring device; 21, main body; 211, shell; 2111, bottom plate; 2112, coaming; 2113, wiring harness channel; 2114, connecting lug; 2115, first screw hole; 2116, second screw hole; 2117, sealing groove; 212, upper cover; 2121, third screw hole; 2122, mounting groove; 213, mounting space; 214, mounting table; 22, acquisition card; 23, display screen.

[0027] The implementation, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0029] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0030] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0031] In the application of transformer, especially oil-immersed transformer, pressure relief valve is usually matched as a safety device to protect electrical equipment such as transformer, which can avoid deformation or burst of transformer tank. When an accident occurs inside the oil-immersed transformer, the oil in the tank is gasified, a large amount of gas is generated, the internal pressure of the tank is rapidly increased, when the pressure in the tank is increased to the opening pressure of the pressure relief valve, the pressure relief valve is quickly opened, the pressure in the tank is rapidly reduced, thereby protecting the transformer tank.

[0032] However, the conventional pressure relief valve completely depends on its mechanical structure, uses the internal spring to generate corresponding action, and does not have the ability to timely predict the pressure change condition inside the transformer. If the mechanical structure of the pressure relief valve fails, it cannot be opened in time, and the internal pressure cannot be released in time, thereby causing serious damage to the transformer tank, and the reliability is poor.

[0033] The utility model provides a kind of transformer monitoring system 100.

[0034] Please refer to Figs. 1-2 In an embodiment of the utility model, the transformer monitoring system 100 includes a pressure relief valve 1 and a monitoring device 2. The pressure relief valve 1 is installed on the tank of the transformer. The pressure relief valve 1 has a cavity that is in communication with the tank. A pressure sensor 11 that is in communication with the cavity is installed on the pressure relief valve 1. The pressure sensor 11 is used to monitor the pressure in the tank. The monitoring device 2 includes a main body 21, a collection card 22, and a display screen 23 that is electrically connected to the collection card 22. The main body 21 is detachably installed on the tank at a position that avoids the pressure relief valve 1. The main body 21 encloses an installation space 213. The collection card 22 is installed in the installation space 213. A wire harness passage 2113 that is in communication with the installation space 213 is formed in the main body 21. A wire harness 12 that connects the collection card 22 and the pressure sensor 11 is arranged through the wire harness passage 2113. The display screen 23 is arranged on the side of the main body 21 that faces away from the tank.

[0035] The utility model discloses a transformer monitoring system 100 can release pressure in time and protect transformer oil tank when the inside pressure of transformer oil tank is too big through pressure relief valve 1, and can monitor the inside pressure of pressure relief valve 1 through setting pressure sensor 11 on pressure relief valve 1, thereby obtains the pressure change condition of transformer oil tank, wherein, the acquisition card 22 that is communicated with pressure sensor 11 through wiring harness is arranged in monitoring device 2, guarantees the stability of data transmission, and still can quickly analyze the pressure condition that pressure sensor 11 gathers through acquisition card 22, if pressure relief valve 1 cannot release the pressure in oil tank in time due to the fault, can take corresponding remedial measures promptly according to the pressure condition in oil tank, and the fault is checked out, thereby prevent the case of the damage of oil tank due to the inside pressure of oil tank being too big, in addition, still can show the pressure condition through display screen 23, thereby the pressure condition in the inside of transformer oil tank is conveniently and quickly viewed, and, through acquisition card 22, still can compare with the pressure threshold value that is set in advance to judge whether the alarm signal needs to be triggered, and promptly informs the relevant personnel to take countermeasures, greatly guarantees the safe operation of pressure sensor 11. Compared with only setting pressure relief valve 1 on the traditional transformer, this transformer monitoring system 100 still has pressure sensor 11 and monitoring device 2, can monitor the pressure change condition of transformer oil tank, thereby can find the problem and take measures in time under the condition of pressure relief valve failure, is more reliable.

[0036] Further, through display screen 23, the pressure alarm threshold value can be adjusted and set, the inside pressure condition of oil tank that pressure sensor 11 gathers is compared with the pressure alarm threshold value by acquisition card 22, thereby judges whether to alarm, the pressure alarm threshold value setting mode and the judgment mode of above-mentioned can adopt prior art to realize, do not repeat here, wherein, in an embodiment, alarm, such as sound alarm, light alarm and the like, can still be arranged in monitoring device 2.

[0037] In addition, through display screen 23, the historical oil tank pressure data can be inquired, thereby provides reliable data reference for transformer fault diagnosis technology.

[0038] In an embodiment, monitoring device 2 still is provided with storage unit, the storage unit can be integrated in acquisition card 22, and acquisition card 22 is integrated with processor, thereby handles the pressure data that pressure sensor 11 gathers, the processor adopts the processor in prior art, such as STM32F103 series single-chip microcomputer.

[0039] In an embodiment, the main body 21 comprises a shell 211 and an upper cover 212, the shell 211 is detachably mounted on the oil tank, the shell 211 encloses a mounting space 213 with an opening, a wire harness channel 2113 is formed on the shell 211, and the opening is located on the side of the shell 211 away from the oil tank; the upper cover 212 is detachably connected with the shell 211 and closes the opening, and the display screen 23 is mounted on the side of the upper cover 212 away from the shell 211.

[0040] It can be understood that the detachable connection of the shell 211 and the upper cover 212 makes the monitoring device 2 easy to disassemble and install, facilitates the installation of the acquisition card 22 and the arrangement of the wire harness inside the mounting space 213, and the display screen 23 is installed on the side of the upper cover 212 away from the shell 211, which makes it convenient for the operator to read the pressure data inside the oil tank; wherein the upper cover 212 closes the opening of the shell 211, thereby improving the airtightness of the mounting space 213, effectively preventing external factors such as dust and moisture from eroding the acquisition card 22 inside the mounting space 213, and prolonging the service life of the monitoring device 2.

[0041] In an embodiment, the shell 211 comprises a bottom plate 2111 and a surrounding plate 2112, the surrounding plate 2112 is arranged on the side of the bottom plate 2111 away from the oil tank to enclose the mounting space 213 with the bottom plate 2111; the opening is formed on the side of the surrounding plate 2112 away from the bottom plate 2111, and the wire harness channel 2113 is formed on the surrounding plate 2112; the connecting lug 2114 is arranged on the outer side of the surrounding plate 2112 away from the mounting space 213, and the connecting lug 2114 is arranged close to the bottom plate 2111, the first screw hole 2115 is formed on the connecting lug 2114, and the first bolt is arranged in the first screw hole 2115, and the shell 211 is connected with the oil tank through the first bolt.

[0042] It can be understood that the bottom plate 2111 and the surrounding plate 2112 together enclose the mounting space 213 to form a stable frame structure, which enhances the mechanical strength of the whole shell 211 and ensures that it remains stable during long-term use; and the first screw hole 2115 on the connecting lug 2114 is connected with the oil tank through the first bolt, which ensures the stability of the shell 211. This fixing method is not only firm and reliable, but also can effectively disperse the stress of the fixing point and avoid damage caused by excessive local stress; and the use of the first bolt makes the shell 211 easy to be detached from the oil tank, which is convenient for installation and maintenance. When the internal components need to be replaced or repaired, the shell 211 can be quickly detached by loosening the bolt without the need for complex tools or steps. The connecting lug 2114 is arranged close to the bottom plate 2111, so that after the shell 211 is mounted on the oil tank, the bottom plate 2111 can be in close contact with the oil tank, thereby further improving the stability of the shell 211 on the oil tank.

[0043] Further, the bottom plate 2111 and the surrounding plate 2112 are integrally formed, the structure is stable, and the installation space 213 is better sealed.

[0044] In an embodiment, each of the two outer sides of the surrounding plate 2112 is provided with at least two connecting ears 2114.

[0045] It can be understood that each outer side is provided with at least two connecting ears 2114, so that the shell 211 can be connected with the oil tank through the plurality of connecting ears 2114. This multi-position connection fixing mode significantly enhances the stability of the shell 211 on the oil tank, and ensures that the shell 211 will not loosen or fall off; the plurality of connecting ears 2114 uniformly distribute the connection positions on both sides of the shell 211, which can better disperse the stress borne by each first bolt, and avoid damage caused by excessive local stress. In addition, the plurality of connecting ears 2114 can ensure that the shell 211 is more closely attached to the surface of the oil tank.

[0046] In an embodiment, the surrounding plate 2112 is provided with a plurality of second screw holes 2116 on one side facing the upper cover 212, and the plurality of second screw holes 2116 are spaced apart; the upper cover 212 is provided with a third screw hole 2121 corresponding to each second screw hole 2116, and the second screw hole 2116 and the third screw hole 2121 corresponding thereto are provided with a second bolt to fasten the upper cover 212 to the surrounding plate 2112.

[0047] It can be understood that the plurality of second screw holes 2116 and the third screw holes 2121 are provided so that the upper cover 212 can be connected with the surrounding plate 2112 through the plurality of second bolts, forming a stable connection effect; and the plurality of second screw holes 2116 are spaced apart, which can make the connection between the upper cover 212 and the surrounding plate 2112 more closely, effectively preventing external factors such as dust and moisture from entering the inside, and protecting the internal collection card 22 from damage. In addition, the bolt connection mode also facilitates quick disassembly and installation of the upper cover 212.

[0048] Further, the surrounding plate 2112 is a square, which has four corners, and each corner is provided with a second screw hole 2116, so that the four second screw holes 2116 are uniformly distributed in four directions of the surrounding plate 2112, thereby making the connection between the upper cover 212 and the surrounding plate 2112 more closely.

[0049] In an embodiment, the collection card 22 has a heat dissipation gap between one side facing the bottom plate 2111 and the bottom plate 2111, and the wire harness channel 2113 is located between the collection card 22 and the bottom plate 2111.

[0050] Understandably, the heat dissipation gap between the collection card 22 and the bottom plate 2111 can effectively help the collection card 22 dissipate heat, which helps to reduce the working temperature of the collection card 22, prolong its service life, ensure long-term stable operation, thereby improving the operation stability of the collection card 22 and being more reliable; and the heat dissipation gap is also convenient for arranging the wire harness, and the structure is more reasonable.

[0051] In an embodiment, the surrounding plate 2112 is provided with a plurality of mounting tables 214 towards the inner side of the mounting space 213, the plurality of mounting tables 214 are distributed along the surrounding direction of the surrounding plate 2112, and the collection card 22 is mounted on the side of the plurality of mounting tables 214 away from the bottom plate 2111.

[0052] Understandably, the plurality of mounting tables 214 can provide multi-point support for the collection card 22, ensure that the collection card 22 is firmly fixed in the mounting space 213, and avoid loosening or falling off due to vibration or impact; the plurality of mounting tables 214 are distributed along the surrounding direction of the surrounding plate 2112, which can ensure that the collection card 22 is uniformly stressed in all directions, improving the overall stability of the collection card 22; the plurality of mounting tables 214 make the collection card 22 have a heat dissipation gap with the bottom plate 2111, and the contact area between the mounting table 214 and the collection card 22 is smaller, which is more conducive to heat dissipation.

[0053] In an embodiment, four mounting tables 214 are provided, which are distributed on opposite two side walls of the mounting space 213, and two mounting tables 214 on the same side wall are arranged at intervals. Understandably, the inner wall of the mounting space 213 is formed by the surrounding plate 2112, and the arrangement of the four mounting tables 214 is conducive to stably mounting the collection card 22.

[0054] Specifically, the collection card 22 can be connected with the mounting table 214 in a bolted manner.

[0055] In another embodiment, the mounting table 214 can also be provided on the bottom plate 2111, which has the same beneficial effects as the mounting table 214 provided on the surrounding plate 2112 described above, and will not be repeated here.

[0056] In an embodiment, the surrounding plate 2112 is provided with a sealing groove 2117 towards one side of the upper cover 212, the sealing groove 2117 is annularly arranged outside the opening, and a sealing rubber strip for sealing the upper cover 212 and the shell 211 is arranged in the sealing groove 2117.

[0057] Understandably, the combination design of the sealing groove 2117 and the sealing rubber strip provides a double sealing effect, ensures that the upper cover 212 and the shell 211 form a tight seal, effectively prevents dust, moisture and other external pollutants from entering the installation space 213 inside, and protects the internal collection card 22 and the like; and, by setting the sealing rubber, the waterproof performance of the monitoring device 2 is further improved, and the reliability is better.

[0058] In an embodiment, the side of the upper cover 212 away from the shell 211 is recessed towards the shell 211 to form a mounting groove 2122, and the bottom of the mounting groove 2122 is provided with a wire passing hole, and the display screen 23 is installed in the mounting groove 2122 and blocks the wire passing hole.

[0059] Understandably, the display screen 23 is installed in the mounting groove 2122 of the upper cover 212, so that the display screen 23 is fixed on the upper cover 212 in an embedded manner, reducing the risk of the display screen 23 being exposed to the outside, effectively preventing dust, moisture and other external pollutants from entering the installation space 213 from the mounting groove 2122. And the mounting groove 2122 can further protect the display screen 23, reducing the possibility of being hit from the outside; the bottom of the mounting groove 2122 is provided with a wire passing hole, which can conveniently connect the display screen 23 and the collection card 22 in the installation space 213 through a wire harness, facilitate the arrangement of the wire harness, hide the wire harness to maintain the appearance, and reduce the risk of accidental damage of the wire harness.

[0060] Specifically, the display screen 23 can also be bolted in the mounting groove 2122, and corresponding studs can be provided on the bottom of the mounting groove 2122. The size of the mounting groove 2122 is adapted to the size of the display screen 23, thereby enhancing the appearance of the monitoring device 2.

[0061] The utility model also proposes a transformer, the transformer has the transformer monitoring system 100 as mentioned above. The specific structure of the transformer monitoring system 100 is referred to the above embodiment, since the transformer adopts all the technical schemes of the above all embodiments, it has at least all the beneficial effects brought by the technical schemes of the above embodiments, which will not be repeated here.

[0062] The above is only an exemplary embodiment of the utility model, and does not limit the patent range of the utility model, any equivalent structural transformation made by the utility model specification and the attached drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A transformer monitoring system, characterized by The transformer monitoring system comprises: A pressure release valve is installed on the oil tank of the transformer, and has a cavity in communication with the oil tank. A pressure sensor in communication with the cavity is installed on the pressure release valve to monitor the pressure in the oil tank. The monitoring device comprises a main body, a collection card, and a display screen electrically connected to the collection card. The main body is detachably installed on the oil tank at a position away from the pressure release valve. The main body encloses an installation space in which the collection card is installed. A wire harness passage is formed in the main body in communication with the installation space. A wire harness connecting the collection card and the pressure sensor is arranged in the wire harness passage. The display screen is arranged on the side of the main body away from the oil tank.

2. The transformer monitoring system of claim 1, wherein, The main body comprises: A shell is detachably installed on the oil tank. The shell encloses the installation space with an opening. The wire harness passage is formed in the shell. The opening is located on the side of the shell away from the oil tank. An upper cover is detachably connected to the shell and closes the opening. The display screen is installed on the side of the upper cover away from the shell.

3. The transformer monitoring system according to claim 2, wherein The shell comprises a bottom plate and a surrounding plate. The surrounding plate surrounds the side of the bottom plate away from the oil tank to enclose the installation space with the bottom plate. The surrounding plate encloses the opening on the side away from the bottom plate. The wire harness passage is formed in the surrounding plate. The outer side of the surrounding plate away from the installation space is provided with a connecting lug close to the bottom plate. A first screw hole is formed in the connecting lug. A first bolt is arranged in the first screw hole. The shell is connected to the oil tank through the first bolt.

4. The transformer monitoring system of claim 3, wherein, Both of the opposite outer sides of the surrounding plate are provided with at least two connecting lugs.

5. The transformer monitoring system according to claim 3, wherein A plurality of second screw holes are formed in the side of the surrounding plate facing the upper cover. The second screw holes are spaced apart. A third screw hole is formed in the upper cover corresponding to each second screw hole. A second bolt is arranged in the second screw hole and the corresponding third screw hole to fasten the upper cover to the surrounding plate.

6. The transformer monitoring system of claim 3, wherein, A heat dissipation gap is formed between the side of the collection card facing the bottom plate and the bottom plate. The wire harness passage is located between the collection card and the bottom plate.

7. The transformer monitoring system of claim 6, wherein, A plurality of mounting platforms are arranged on the inner side of the surrounding plate facing the installation space. The mounting platforms are spaced apart along the surrounding direction of the surrounding plate. The collection card is mounted on the side of the mounting platforms away from the bottom plate.

8. The transformer monitoring system of claim 3, wherein, A sealing groove is formed in the side of the surrounding plate facing the upper cover. The sealing groove is arranged around the opening. A sealing rubber strip is arranged in the sealing groove to seal the upper cover and the shell.

9. The transformer monitoring system of claim 2, wherein, The side of the upper cover away from the shell is recessed to form a mounting groove towards the shell. A wire passing opening is formed in the groove bottom of the mounting groove. The display screen is mounted in the mounting groove and seals the wire passing opening.

10. A transformer, characterized by The transformer application has the transformer monitoring system as claimed in any one of claims 1 to 9. The transformer application has the transformer monitoring system as claimed in any one of claims 1 to 9.

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