A reusable dry-type high-voltage cable partial discharge test terminal

Abstract

This utility model belongs to the field of cable testing technology, specifically relating to a reusable dry-type high-voltage cable partial discharge test terminal, including a capacitive voltage divider and a dielectric loss device electrically connected to the test taps in the capacitive voltage divider via wires. The capacitive voltage divider includes an insulating cylinder and equalizing rings one and two disposed at both ends of the insulating cylinder. The insulating cylinder contains an insulating medium and has cable conductors inserted inside. A support is fixedly connected to the bottom of the insulating cylinder. The support includes a base plate, a vertical support plate, and a horizontal support plate. The vertical support plates are symmetrically disposed on both sides of the horizontal support plate and the base plate is fixedly connected to the bottom. The bottom plate of the vertical support plate and the two side plates of the horizontal support plate have matching through holes. The horizontal support plate is connected to the vertical support plate by fasteners, and the insulating cylinder is connected to the horizontal support plate by fasteners. The beneficial effect of this utility model is that it adds a dielectric loss device to measure the loss value of medium and high voltage cables during full-power operation.

Description

Technical Field

[0001] This utility model relates to the field of cable testing technology, specifically to a reusable dry-type high-voltage cable partial discharge test terminal. Background Technology

[0002] Partial discharge testing is a method for evaluating the insulation performance of equipment by detecting partial discharge phenomena. This test aims to identify defects in the equipment's structure and manufacturing process, such as excessively high internal partial discharge fields, sharp corners on metal parts, and impurities or localized defects in the insulation, thereby preventing insulation damage caused by partial discharge. However, traditional oil-water terminal testing equipment can only perform withstand voltage and partial discharge tests on medium and high voltage cables, resulting in low testing efficiency. Utility Model Content

[0003] This invention addresses the problems mentioned above by designing a reusable dry-type high-voltage cable partial discharge test terminal, which is equipped with a dielectric loss device to measure the loss value of medium and high voltage cables during full-power operation.

[0004] To achieve the above objectives, this utility model provides a reusable dry-type high-voltage cable partial discharge test terminal, including a capacitive voltage divider and a dielectric loss device electrically connected to the test tap in the capacitive voltage divider via a wire. The capacitive voltage divider includes an insulating cylinder and equalizing ring one and equalizing ring two disposed at both ends of the insulating cylinder. The insulating cylinder contains an insulating medium and has cable conductors inserted inside.

[0005] Furthermore, a bracket is fixedly connected to the bottom of the insulating cylinder.

[0006] Furthermore, the bracket includes a base plate, a vertical support plate, and a horizontal support plate. The vertical support plate is symmetrically arranged on both sides of the horizontal support plate and is fixedly connected to the base plate at its bottom. The bottom plate of the vertical support plate and the two side plates of the horizontal support plate have matching through holes. The horizontal support plate is connected to the vertical support plate by fasteners, and the insulating cylinder is connected to the horizontal support plate by the fasteners.

[0007] Furthermore, a support leg is installed at the bottom of the support frame, and a walking component is installed at the bottom of the support leg.

[0008] Furthermore, the walking assembly includes a mounting base for fixedly connecting the outriggers, as well as a swivel wheel and a brake. The swivel wheel is hinged to the mounting base, and the brake is used to brake the swivel wheel.

[0009] Furthermore, a pad is fixedly connected to the bottom of the bracket, and the pad has a cross-shaped slot that matches the support leg.

[0010] Furthermore, the support leg includes a first support leg and a second support leg arranged in a cross configuration. The first support leg is movably inserted into the slot, and the first support leg has a clearance groove. The second support leg is sequentially inserted into the slot and the clearance groove.

[0011] Furthermore, the pad and the support leg are provided with threaded holes, and screws and nuts are installed in the threaded holes.

[0012] Furthermore, an anti-slip rubber pad is fixedly connected to the bottom of the pad.

[0013] Preferably, the insulating medium is one or a mixture of two of N2 or SF6.

[0014] In summary, this utility model has the following advantages and beneficial technical effects:

[0015] 1. This utility model adds a dielectric loss device. The dielectric loss detector is connected to the test tap of the voltage divider through the wiring terminal, thereby measuring the loss value of medium and high voltage cables when operating at full power, increasing the integration of equipment detection.

[0016] 2. In this utility model, the bracket is used to stably support the body of the capacitive voltage divider, the walking component improves the mobility and convenience of the equipment, and the support legs and pads form a detachable design of the walking component. The walking component at the bottom of the equipment can be flexibly disassembled and assembled according to the application scenario, thereby improving the reliability of transportation. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a three-dimensional schematic diagram of some structures in this utility model;

[0020] Figure 3 This is a perspective structural diagram of the pad block in this utility model;

[0021] Figure 4 This is a diagram showing the usage state of the support leg in this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the first leg in this utility model.

[0023] The reference numerals in the attached figures are:

[0024] 1. Capacitive voltage divider; 11. Insulating cylinder; 12. Equalizing ring one; 13. Equalizing ring two;

[0025] 2. Dielectric loss device; 3. Support; 31. Base plate; 32. Vertical support plate; 33. Horizontal support plate; 4. Support leg; 41. Relief groove; 5. Pad block. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-5 The present invention will be described in further detail as follows:

[0027] like Figure 1 As shown, this embodiment discloses a reusable dry-type high-voltage cable partial discharge test terminal, including a capacitive voltage divider 1 and a dielectric loss device 2 electrically connected to the test tap in the capacitive voltage divider 1 via a wire. The dielectric loss device 2 is a dielectric loss detector. The capacitive voltage divider 1 includes an insulating cylinder 11 and equalizing rings 12 and 13 disposed at both ends of the insulating cylinder 11. The insulating cylinder 11 contains an insulating medium and has cable conductors inserted inside. A support 3 is fixedly connected to the bottom of the insulating cylinder 11. The support 3 includes a base plate 31, a vertical support plate 32, and a horizontal support plate 33. The vertical support plate 32 is symmetrically disposed on both sides of the horizontal support plate 33 and the bottom... The base plate 31 is welded and fixed. The bottom plate of the vertical support plate 32 and the two side plates of the horizontal support plate 33 are provided with matching through holes. The horizontal support plate 33 is connected to the vertical support plate 32 by fastening screws. The insulating cylinder 11 is connected to the horizontal support plate 33 by fastening screws. The bottom of the bracket 3 is equipped with legs 4 in a circular array. The bottom of the legs 4 is equipped with a walking component (not shown in the figure). In this embodiment, the vertical support plate 32, the horizontal support plate 33 and the legs 4 are all made of U-shaped steel. The walking component includes a mounting seat that is fixedly connected to the legs 4, as well as a universal wheel and a brake. The universal wheel is hinged to the mounting seat. The brake is a foot-operated locking device. The brake is connected to the universal wheel.

[0028] like Figures 2-3 As shown, a cross-shaped pad 5 is welded to the bottom of the bracket 3, and the pad 5 has a cross-shaped slot that matches the support leg 4.

[0029] like Figures 4-5 As shown, the support leg 4 includes a first support leg 4 and a second support leg 4 arranged in a cross configuration. The first support leg 4 is movably inserted into a slot and has a clearance groove 41. The second support leg 4 is sequentially inserted into the slot and the clearance groove 41. The pad 5 and the support leg 4 are provided with threaded holes, and screws and nuts are installed in the threaded holes. The bottom of the pad 5 is glued with an anti-slip rubber pad (not shown in the figure).

[0030] Preferred insulating media: N2, SF6; preferred mixing method: one or a mixture of two.

[0031] The working principle of this reusable dry-type high-voltage cable partial discharge test terminal is as follows: During the partial discharge test, the test cable is stripped and the outer insulation layer is ground off according to the installation dimensions to expose the conductor layer. The cable conductor is then inserted into the insulation cylinder 11 until it contacts the stress cone in the capacitive voltage divider 1. Simultaneously with the partial discharge test, the dielectric loss tester is connected to the test tap of the capacitive voltage divider 1 through the wiring terminals to synchronously measure the loss value of the medium and high voltage cable during full-power operation.

[0032] During the testing and equipment ground transfer, the outriggers 4 and the traveling assembly are installed at the bottom of the support 3. First, the first outrigger 4 is inserted and secured with screws and nuts. Then, the second outrigger 4 is sequentially inserted into the pad 5 and the clearance groove 41, and secured with screws and nuts. During the test, the brakes are engaged to lock the casters and prevent equipment displacement. Furthermore, when transferring the test terminal using a transport vehicle, the screws and nuts are removed, and the outriggers 4 are pulled out, allowing the pad 5 to rest on the floor of the transport vehicle, increasing the contact area with the vehicle body.

[0033] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A reusable dry-type high voltage cable partial discharge test termination, characterized by: The device includes a capacitive voltage divider and a dielectric loss device electrically connected to the test tap in the capacitive voltage divider via a wire. The capacitive voltage divider includes an insulating cylinder and equalizing rings one and two disposed at both ends of the insulating cylinder. The insulating cylinder contains an insulating medium and has cable conductors inserted inside.

2. The reusable dry-type high-voltage cable partial discharge test terminal according to claim 1, characterized in that: The bottom of the insulating cylinder is fixedly connected to the bracket.

3. The reusable dry-type high-voltage cable partial discharge test terminal according to claim 2, characterized in that: The bracket includes a base plate, a vertical support plate, and a horizontal support plate. The vertical support plates are symmetrically arranged on both sides of the horizontal support plate and are fixedly connected to the base plate at their bottom. The bottom plate of the vertical support plate and the two side plates of the horizontal support plate have matching through holes. The horizontal support plate is connected to the vertical support plate by fasteners, and the insulating cylinder is connected to the horizontal support plate by the fasteners.

4. A reusable dry-type high-voltage cable partial discharge test terminal according to claim 2, characterized in that: The support frame is equipped with legs at the bottom, and a walking component is installed at the bottom of the legs.

5. A reusable dry-type high-voltage cable partial discharge test terminal according to claim 4, characterized in that: The walking assembly includes a mounting base for fixedly connecting the outriggers, as well as casters and a brake. The casters are hinged to the mounting base, and the brake is used to brake the casters.

6. A reusable dry-type high-voltage cable partial discharge test terminal according to claim 4, characterized in that: A pad is fixedly connected to the bottom of the bracket, and the pad has a cross-shaped slot that matches the support leg.

7. A reusable dry-type high-voltage cable partial discharge test terminal according to claim 6, characterized in that: The support legs include a first support leg and a second support leg arranged in a cross configuration. The first support leg is movably inserted into the slot and has a clearance groove. The second support leg is sequentially inserted into the slot and the clearance groove.

8. A reusable dry-type high-voltage cable partial discharge test terminal according to claim 6, characterized in that: The pad and the support leg have threaded holes through them, and screws and nuts are installed in the threaded holes.

9. A reusable dry-type high-voltage cable partial discharge test terminal according to claim 6, characterized in that: The bottom of the pad is fixedly connected to an anti-slip rubber pad.

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