Pressurizing device and pressurizing method for cable line fault detection

Abstract

The embodiment of the invention relates to a pressurizing device and a pressurizing method for cable line fault detection, a cable line is provided with a GIS body and a grounding terminal arranged on the GIS body, and the pressurizing device comprises an insulating shell, a fastener, a high-voltage lead and a power supply; wherein the insulation shell is provided with a containing cavity, an opening and a lead hole, the opening is communicated with the containing cavity, the lead hole is communicated with the containing cavity and the outer wall of the insulation shell, the GIS body is arranged on one side of the opening of the insulation shell, and the grounding terminal is contained in the containing cavity; the fastening piece is detachably arranged on the insulating shell, and when the fastening piece is installed on the insulating shell, the fastening piece can tightly abut against the GIS body under the action of tightening force so that the insulating shell can be connected with the GIS body; the high-voltage lead penetrates through the lead hole, one end of the high-voltage lead is connected to the grounding terminal, and the other end of the high-voltage lead is located outside the insulating shell. The pressurizing device disclosed by the invention can quickly apply high voltage required by a test under the conditions of not opening a cabin and not disassembling a conductor.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric power equipment, and in particular to a pressurizing device and a pressurizing method for cable line fault detection. Background Art

[0002] As an important equipment in the urban power transmission network, the safe operation of power cables is very important to the normal operation of the power grid. With the large-scale application of double-terminal GIS substations, the number of double-terminal GIS cable lines has gradually increased. However, compared with the previous overhead cable hybrid lines, the conductors of the double-terminal GIS cable lines are in a fully enclosed state and there are no exposed wires. This makes it difficult to immediately carry out fault detection once a fault occurs in the double-terminal GIS cable line. In addition, in the prior art, when performing fault detection on the double-terminal GIS cable line, it is necessary to open the double-terminal GIS cable line, remove the conductors, and other operations before a pressure test can be carried out. This is not only time-consuming, but also complicated to operate, affecting the efficiency of emergency repairs.

[0003] Therefore, it is necessary to provide a new technical solution to improve one or more problems existing in the above solutions.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to provide a pressurizing device for cable line fault detection, which can apply the high voltage required for cable fault detection test without opening the warehouse or removing the conductor, and is simple to operate, which helps to improve the efficiency of emergency repairs.

[0006] According to a first aspect of an embodiment of the present disclosure, a pressurizing device for cable line fault detection is provided, wherein the cable line has a GIS body and a grounding terminal provided on the GIS body, comprising:

[0007] An insulating shell, wherein the insulating shell has a receiving cavity, an opening and a lead hole, wherein the opening is connected to the receiving cavity, and the lead hole is connected to the receiving cavity and an outer wall of the insulating shell, wherein the GIS body is arranged on one side of the opening of the insulating shell, and the grounding terminal is accommodated in the receiving cavity;

[0008] A fastener is detachably disposed on the insulating housing, and the fastener can be pressed against the GIS body under the action of a tightening force to connect the insulating housing with the GIS body;

[0009] A high-voltage lead wire, which is passed through the lead wire hole and has one end connected to the ground terminal and the other end located outside the insulating housing;

[0010] A power source is connected to the other end of the high voltage lead and is used to apply voltage.

[0011] In an exemplary embodiment of the present disclosure, a sealing ring is provided in the lead-in hole, and the sealing ring is sandwiched between the inner wall of the lead-in hole and the high-voltage lead-in.

[0012] In an exemplary embodiment of the present disclosure, a threaded hole is provided on the insulating housing, an external thread is provided on an outer surface of the fastener, and the fastener is threadedly connected to the threaded hole.

[0013] In an exemplary embodiment of the present disclosure, an oil drain port is provided at the bottom of the insulating shell, and a valve is provided at the oil drain port.

[0014] In an exemplary embodiment of the present disclosure, the insulating shell includes a bottom shell and a plurality of side shells arranged on the bottom shell, the plurality of side shells and the bottom shell are surrounded to form a containing structure with an opening, and the bottom shell is provided with feet.

[0015] According to a second aspect of an embodiment of the present disclosure, a pressurization method for cable line fault detection is provided, comprising:

[0016] Use a connector to electrically connect one end of the high-voltage lead to the grounding terminal of the GIS body;

[0017] Pass the other end of the high-voltage lead through the lead hole of the insulating shell and connect it to the power supply;

[0018] Moving the insulating housing and allowing the grounding terminal to extend from the opening of the insulating housing into the accommodating cavity of the insulating housing;

[0019] Adjust the position of the insulating shell so that an opening gap is left between the opening of the insulating shell and the GIS body, and connect the insulating shell to the GIS body using fasteners;

[0020] Injecting insulating oil into the accommodating cavity of the insulating housing from the opening gap;

[0021] Turn on the power supply and apply voltage to the GIS body.

[0022] In an exemplary embodiment of the present disclosure, before electrically connecting one end of the high-voltage lead to the ground terminal of the GIS body using a connector, the method further includes:

[0023] Remove the ground knife terminal connector on the ground terminal to leave a hole for the connector.

[0024] In an exemplary embodiment of the present disclosure, before passing the other end of the high-voltage lead through the lead hole of the insulating housing, the method further includes:

[0025] The insulating housing is moved to a position to be installed, where the position to be installed is a position where an opening of the insulating housing is at an installation distance from the ground terminal.

[0026] In an exemplary embodiment of the present disclosure, after the insulating housing is connected to the GIS body by fasteners, the method further comprises:

[0027] A sealant is applied from the outside of the insulating shell to the connection between the high-voltage lead and the lead hole of the insulating shell.

[0028] In an exemplary embodiment of the present disclosure, after injecting insulating oil into the accommodating cavity of the insulating housing from the opening gap, the method further includes:

[0029] The insulating oil in the accommodating cavity is left to stand for a set time.

[0030] The technical solution provided by the present disclosure may have the following beneficial effects:

[0031] In the embodiment of the present disclosure, the high-voltage lead is electrically connected to the grounding terminal on the GIS body through a connector, and the insulating shell is connected to the GIS body through a fastener; and the accommodating cavity of the insulating shell is used to accommodate part of the GIS body, the grounding terminal on the GIS body, and the insulating oil used during the pressure test, so that the grounding terminal and the connection part between the grounding terminal and the high-voltage lead can be kept immersed in the insulating oil during the pressure test; the other end of the high-voltage lead can be led out of the insulating shell through the lead hole on the insulating shell, so as to be connected to the power supply, and the power supply is turned on to apply a high voltage to the GIS body through the high-voltage lead. The pressurizing device in this embodiment can be used to quickly apply the high voltage required for the cable fault detection test to the GIS cable line without opening the warehouse or removing the conductor, and the operation is simple, which is conducive to improving the repair efficiency.

[0032] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0034] Figure 1A schematic diagram showing the structure of a pressurizing device for cable line fault detection according to an exemplary embodiment of the present disclosure after insulating oil is injected;

[0035] Figure 2 A schematic structural diagram of a pressurizing device for cable line fault detection according to an exemplary embodiment of the present disclosure is shown;

[0036] Figure 3 A schematic structural diagram showing an insulating housing according to an exemplary embodiment of the present disclosure;

[0037] Figure 4 A flow chart showing the steps of a pressurization method for cable line fault detection according to an exemplary embodiment of the present disclosure.

[0038] Figure numerals: 100, GIS body; 110, grounding terminal; 200, insulating shell; 210, bottom shell; 220, side shell; 230, foot; 201, accommodating chamber; 202, opening; 203, lead hole; 2031, sealing ring; 204, threaded hole; 205, oil drain port; 2051, valve; 300, fastener; 301, bolt rod; 302, bolt head; 400, high-voltage lead; 500, connecting piece. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0040] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0041] In this exemplary embodiment, a pressurizing device for cable line fault detection is first provided. Figure 1As shown in , the cable line is a double-end GIS cable line, which can be understood as that both ends of the cable line have a GIS body 100 and a grounding terminal 110 arranged on the GIS body 100. The pressurizing device for cable line fault detection provided in this embodiment can be applied to either end of the cable line. Specifically, the pressurizing device includes an insulating shell 200, a fastener 300, a high-voltage lead 400 and a power supply; wherein the insulating shell 200 has a accommodating cavity 201, an opening 202 and a lead hole 203, wherein the opening 202 is connected to the accommodating cavity 201, and the lead hole 203 is connected to the accommodating cavity 201 and the outer wall of the insulating shell 200, and the GIS body 100 is arranged at the insulating shell 200. On one side of the opening 202, the grounding terminal 110 is accommodated in the accommodating cavity 201; the fastener 300 is detachably arranged on the insulating shell 200. When the fastener 300 is installed on the insulating shell 200, the fastener 300 can be tightly pressed against the GIS body 100 under the action of the tightening force to connect the insulating shell 200 with the GIS body 100; the high-voltage lead 400 is passed through the lead hole 203, and one end is connected to the grounding terminal 110, and the other end is located on the outside of the insulating shell 200.

[0042] In the embodiment of the present disclosure, the high-voltage lead 400 is electrically connected to the grounding terminal 110 on the GIS body 100 through the connector 500, and the insulating housing 200 is connected to the GIS body 100 through the fastener 300; and the accommodating cavity 201 of the insulating housing 200 is used to accommodate part of the GIS body 100, the grounding terminal 110 on the GIS body 100, and the insulating oil used during the pressure test, so that the grounding terminal 110 and the connection part between the grounding terminal 110 and the high-voltage lead 400 can be kept immersed in the insulating oil during the pressure test; the other end of the high-voltage lead 400 can be led out of the insulating housing 200 through the lead hole 203 on the insulating housing 200, so as to be connected to the power supply, and the power supply is turned on to apply a high voltage to the GIS body 100 through the high-voltage lead 400. The pressurizing device in this embodiment can realize the high voltage required for the cable fault detection test to be quickly applied to the GIS cable line without opening the warehouse or removing the conductor, and the operation is simple, which is conducive to improving the repair efficiency.

[0043] Below, reference Figures 1 to 3 As shown in the figure, the above-mentioned pressurizing device for cable line fault detection in this example embodiment will be described in more detail.

[0044] For example, an existing double-terminal GIS cable line refers to a cable line with GIS terminals at both ends of the cable. The conductor of the entire cable line is completely enclosed in a cabin, and a fault location voltage cannot be directly applied during fault detection.

[0045] Example, reference Figure 2As shown in FIG, a grounding terminal 110 is disposed at the lower end of the GIS body 100, and the grounding terminal 110 is exposed outside the GIS body 100. Therefore, in this embodiment, the opening 202 of the insulating shell 200 is arranged toward the grounding terminal 110 of the GIS body 100, and part of the GIS body 100 and the grounding terminal 110 on the GIS body 100 are accommodated in the accommodation cavity 201; Figure 1 As shown in , during the pressure test, insulating oil is injected into the accommodating cavity 201, and the grounding terminal 110 and the portion where the high-voltage lead 400 is connected to the grounding terminal 110 can be immersed in the insulating oil, and the insulating oil plays an insulating role during the pressure test.

[0046] In one embodiment, the insulating housing 200 includes a bottom housing 210 and a plurality of side housings 220 disposed on the bottom housing 210, wherein the plurality of side housings 220 and the bottom housing 210 are arranged to form a receiving structure having an opening 202; wherein the side housing 220 and the bottom housing 210 are arranged vertically, and the edge portions of one side of the plurality of side housings 220 away from the bottom housing 210 are connected to form an opening portion of the insulating housing 200, and the bottom housing 210 is provided with a foot 230. The above-mentioned insulating housing 200 has a simple structure and is easy to process and manufacture; and by providing the foot 230, the insulating housing 200 can be supported by the foot 230 when the pressurizing device is placed.

[0047] In one embodiment, the lead hole 203 on the insulating housing 200 is opened on the side housing 220, and a sealing ring 2031 is provided in the lead hole 203, and the sealing ring 2031 is sandwiched between the inner wall of the lead hole 203 and the high-voltage lead 400. By providing the sealing ring 2031 in the lead hole 203, it is ensured that the high-voltage lead 400 and the inner wall of the lead hole 203 are tightly abutted without a gap, thereby preventing the insulating oil in the accommodating cavity 201 from leaking from the lead hole 203 during the pressure test.

[0048] Optionally, the sealing ring 2031 provided in the lead-in hole 203 may be an I-shaped sealing ring 2031, and the sealing ring 2031 has a certain elasticity and may be made of silicone rubber, EPDM rubber, or the like.

[0049] Furthermore, the connection between the high-voltage lead 400 and the lead hole 203 is coated with sealant, which can seal the tiny gap between the lead hole 203, the sealing ring 2031 and the high-voltage lead 400 to further improve the sealing of the connection between the high-voltage lead 400 and the lead hole 203.

[0050] In one embodiment, a threaded hole 204 is provided on the side shell 220 of the insulating shell 200. In a direction perpendicular to the side shell 220, the threaded hole 204 is closer to the opening 202 of the insulating shell 200 than the lead hole 203. An external thread is provided on the outer surface of the fastener 300, and the fastener 300 is threadedly connected to the threaded hole 204. When the insulating shell 200 and the GIS body 100 are fixed, the two can be fixed by simply rotating the fastener 300, which is simple to operate and saves time.

[0051] Optionally, the fastener 300 includes a bolt having a bolt rod 301 and a bolt head 302 connected to one end of the bolt rod 301. When the fastener 300 is installed on the insulating housing 200, the bolt rod 301 is inserted into the threaded hole 204, and one end of the bolt rod 301 away from the bolt head 302 faces the GIS body 100, and the bolt head 302 is located outside the insulating housing 200. When installing the insulating housing 200, the bolt rod 301 can be driven to rotate by rotating the bolt head 302, and the bolt rod 301 and the threaded hole 204 are connected. 4, the bolt rod 301 can move toward the GIS body 100 along the axial direction of the threaded hole 204 and tightly abut the GIS body 100, so as to fix the insulating shell 200 to the GIS body 100; when disassembling the insulating shell 200, the bolt head 302 can be rotated to drive the bolt rod 301 to rotate, so that the bolt rod 301 is separated from the GIS body 100, and then the insulating shell 200 is disassembled from the GIS body 100. Not only is the overall operation simple, but also the bolt specifications are diverse and the cost is low.

[0052] Optionally, the insulating shell 200 is provided with a plurality of threaded holes 204, such as each side shell 220 of the insulating shell 200 is provided with a threaded hole 204, each threaded hole 204 is configured with a fastener 300, and the plurality of threaded holes 204 cooperate with the plurality of fasteners 300 to ensure that the insulating shell 200 and the GIS body 100 are firmly fixed.

[0053] In one embodiment, the connector 500 is an electrical conductor to ensure reliable electrical connection between the high voltage lead 400 and the ground terminal 110 .

[0054] Optionally, the insulating housing 200 may be made of materials such as hard plastic, quartz or glass.

[0055] In one embodiment, an oil drain port 205 is provided at the bottom of the insulating housing 200, and a valve 2051 is provided at the oil drain port 205. When the pressure test is performed, the valve 2051 on the oil drain port 205 is closed; after the pressure test is completed, the insulating oil in the accommodating cavity 201 can be discharged from the oil drain port 205 by opening the valve 2051, and the insulating housing 200 can be removed from the GIS body 100 after the insulating oil in the accommodating cavity 201 is emptied to prevent the insulating oil from spilling.

[0056] It should be noted that the oil drain port 205 is disposed near the bottom shell 210 of the insulating shell 200 or is disposed on the bottom shell 210 so as to drain the insulating oil in the accommodating cavity 201 after the pressure test is completed.

[0057] Furthermore, in this exemplary embodiment, a pressurization method for cable line fault detection is also provided, referring to Figure 3 As shown in , the method may include the following steps:

[0058] Step S101: using the connector 500 to electrically connect one end of the high voltage lead wire 400 to the ground terminal 110 of the GIS body 100;

[0059] Step S102: Pass the other end of the high-voltage lead wire 400 through the lead wire hole 203 of the insulating housing 200 and connect it to a power source;

[0060] Step S103: moving the insulating housing 200 and extending the grounding terminal 110 from the opening of the insulating housing 200 into the accommodating cavity 201 of the insulating housing 200;

[0061] Step S104: adjusting the position of the insulating housing 200 so that an opening gap is left between the opening of the insulating housing 200 and the GIS body 100, and connecting the insulating housing 200 to the GIS body 100 using the fastener 300;

[0062] Step S105: injecting insulating oil into the accommodating cavity 201 of the insulating housing 200 from the opening gap;

[0063] Step S106 : Turn on the power supply and apply voltage to the GIS body 100 .

[0064] In the embodiment of the present disclosure, one end of the high-voltage lead 400 is electrically connected to the grounding terminal 110 on the GIS body 100 by using the connector 500. Before the insulating housing 200 and the GIS body 100 are fixed by using the fastener 300, the other end of the high-voltage lead 400 needs to be passed through the lead hole 203 of the insulating housing 200 so that the high-voltage lead 400 can be connected to the power supply during the subsequent pressure test. After the high-voltage lead 400 is processed, the position of the insulating housing 200 is moved so that the grounding terminal 110 extends from the opening of the insulating housing 200 to the insulating housing 200. The housing 201 of the housing 200 is then adjusted to leave an opening gap between the opening of the housing 200 and the GIS body 100, so that insulating oil can be injected into the housing 201 during the subsequent pressure test; after the high-voltage lead 400 and the insulating housing 200 are adjusted, the insulating housing 200 and the GIS body 100 are fixed with fasteners 300, and then insulating oil is injected into the housing 201 of the insulating housing 200 from the opening gap, and finally the power is turned on to apply voltage to the GIS body 100. The pressurization method in this embodiment can meet the pressure test requirements of cable fault detection without opening the warehouse or removing the conductor, and the operation is simple, which is conducive to improving the efficiency of emergency repairs.

[0065] Below, each step of the above method in this example implementation will be described in more detail.

[0066] Specifically, in step S105, the insulating oil is injected into the accommodating cavity 201 of the insulating shell 200 from the opening gap. When injecting the insulating oil, it is necessary to maintain a uniform and slow injection speed, and the insulating oil needs to immerse the grounding terminal 110, the connector 500, and the connection portion between the high-voltage lead 400 and the connector 500.

[0067] Optionally, the insulating oil is a fluid and transparent insulating oil.

[0068] Specifically, before one end of the high-voltage lead wire 400 is electrically connected to the ground terminal 110 of the GIS body 100 by using the connector 500, the following steps are further included:

[0069] The ground knife terminal connecting piece on the ground terminal 110 is removed to leave a mounting hole for the connector 500. The method proposed in this embodiment can effectively utilize the characteristics of the GIS cable line itself to connect the various components required for the pressure test to the GIS body 100 without opening the warehouse and removing the conductor.

[0070] It should be noted that, in this embodiment, when applying pressure, it is necessary to do so at the location where the line grounding terminal connecting piece of the GIS cable line is provided, so as to ensure that the high voltage used for fault detection is applied to the GIS cable line.

[0071] In one embodiment, one end of the high voltage lead 400 is electrically connected to the ground terminal 110 of the GIS body 100 by using the connector 500, and the following steps are also included:

[0072] Electrically connecting one end of the high voltage lead wire 400 to the connector 500;

[0073] The connector 500 is installed in the installation hole of the ground terminal 110. In the above method, the connector 500 is used to electrically connect the high voltage lead 400 to the ground terminal 110, which is simple to operate, time-saving and reliable in electrical connection.

[0074] Optionally, the connector 500 may be a hexagonal bolt. Since the hexagonal bolt is consistent with the bolt shape of the original grounding terminal connecting piece on the GIS body 100, it can be ensured to be completely matched with the installation hole position on the grounding terminal 110, which is not only simple to operate and has good stability, but also does not damage the GIS body 100.

[0075] Optionally, before the other end of the high-voltage lead wire 400 is passed through the lead wire hole 203 of the insulating housing 200, the following steps are further included:

[0076] The insulating housing 200 is moved to a position to be installed, where the opening of the insulating housing 200 is at an installation distance from the ground terminal 110 .

[0077] By adjusting the position of the insulating shell 200 before step S102 so that the lead hole 203 on the insulating shell 200 is close to the GIS body 100, it is convenient for the operator to pass the high-voltage lead 400 connected to the grounding terminal 110 through the lead hole 203, and then connect the high-voltage lead 400 led out of the insulating shell 200 to the power supply.

[0078] Optionally, after the insulating housing 200 is connected to the GIS body 100 by using the fastener 300, the following steps are further included:

[0079] A sealant is applied from the outside of the insulating housing 200 to the connection between the high voltage lead wire 400 and the lead wire hole 203 of the insulating housing 200 .

[0080] After step S104 , the connection between the high-voltage lead wire 400 and the lead wire hole 203 is sealed with a sealant to plug the small gap between the lead wire hole 203 and the high-voltage lead wire 400 , thereby improving the sealing performance of the connection between the high-voltage lead wire 400 and the lead wire hole 203 .

[0081] Optionally, after injecting insulating oil into the accommodating cavity 201 of the insulating housing 200 from the opening gap, the method further includes:

[0082] Leaving the insulating oil in the accommodating cavity 201 to stand for a set time, such as 1-2 hours, can ensure that the insulating oil is in a uniform state, thereby ensuring that the insulating oil plays a certain insulating role.

[0083] Optionally, in step S106, the power is turned on to apply voltage to the GIS body 100. The voltage applied in this step is an AC high voltage or impulse voltage for high resistance and flashover faults of the high-voltage cable, so as to locate the fault of the GIS cable line.

[0084] Regarding the system in the above embodiment, the specific manner in which each unit performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0085] It should be noted that although several units of the system for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiment of the present disclosure, the features and functions of two or more units described above can be concretized in one unit. Conversely, the features and functions of a unit described above can be further divided into multiple units for concretization. Some or all of the units can be selected according to actual needs to achieve the purpose of the disclosed solution. Those of ordinary skill in the art can understand and implement it without paying creative work.

[0086] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A pressurizing device for cable line fault detection, the cable line having a GIS body and a grounding terminal arranged on the GIS body, characterized in that: include: An insulating shell, wherein the insulating shell has a receiving cavity, an opening and a lead hole, wherein the opening is connected to the receiving cavity, and the lead hole is connected to the receiving cavity and an outer wall of the insulating shell, wherein the GIS body is arranged on one side of the opening of the insulating shell, and the grounding terminal is accommodated in the receiving cavity; A fastener is detachably disposed on the insulating housing, and the fastener can be pressed against the GIS body under the action of a tightening force to connect the insulating housing with the GIS body; A high-voltage lead wire, the high-voltage lead wire is passed through the lead wire hole, one end of the high-voltage lead wire is connected to the ground terminal, and the other end of the high-voltage lead wire is located outside the insulating shell; A power source is connected to the other end of the high voltage lead and is used to apply voltage.

2. The pressurizing device for cable line fault detection according to claim 1, characterized in that: A sealing ring is arranged in the lead-in hole, and the sealing ring is clamped between the inner wall of the lead-in hole and the high-voltage lead-in.

3. The pressurizing device for cable line fault detection according to claim 1, characterized in that: A threaded hole is provided on the insulating shell, an external thread is provided on the outer surface of the fastener, and the fastener is threadedly connected to the threaded hole.

4. The pressurizing device for cable line fault detection according to claim 1, characterized in that: An oil drain port is provided at the bottom of the insulating shell, and a valve is provided at the oil drain port.

5. The pressurizing device for cable line fault detection according to claim 1, characterized in that: The insulating shell comprises a bottom shell and a plurality of side shells arranged on the bottom shell. The plurality of side shells and the bottom shell are surrounded to form a containing structure with an opening. The bottom shell is provided with feet.

6. A pressurization method for cable line fault detection, characterized in that: include: Use a connector to electrically connect one end of the high-voltage lead to the grounding terminal of the GIS body; Pass the other end of the high-voltage lead through the lead hole of the insulating shell and connect it to the power supply; Moving the insulating housing and allowing the grounding terminal to extend from the opening of the insulating housing into the accommodating cavity of the insulating housing; Adjust the position of the insulating shell so that an opening gap is left between the opening of the insulating shell and the GIS body, and connect the insulating shell to the GIS body using fasteners; Injecting insulating oil into the accommodating cavity of the insulating housing from the opening gap; Turn on the power supply and apply voltage to the GIS body.

7. The pressurization method for cable line fault detection according to claim 6, characterized in that: Before electrically connecting one end of the high-voltage lead to the ground terminal of the GIS body using the connector, the method further includes: Remove the ground knife terminal connector on the ground terminal to leave a hole for the connector.

8. The pressurization method for cable line fault detection according to claim 6, characterized in that: Before the other end of the high-voltage lead is passed through the lead hole of the insulating housing, the method further comprises: The insulating housing is moved to a position to be installed, where the position to be installed is a position where an opening of the insulating housing is at an installation distance from the ground terminal.

9. The pressurization method for cable line fault detection according to claim 6, characterized in that: After the insulating housing is connected to the GIS body by fasteners, the method further comprises: A sealant is applied from the outside of the insulating shell to the connection between the high-voltage lead and the lead hole of the insulating shell.

10. The pressurization method for cable line fault detection according to claim 6, characterized in that: After the insulating oil is injected into the accommodating cavity of the insulating housing through the opening gap, the method further includes: The insulating oil in the accommodating cavity is left to stand for a set time.

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