Insulator spacer for LPIT having embedded mesh-type voltage sensor

Abstract

Disclosed is an insulator spacer for an LPIT having an embedded mesh-type voltage sensor. According to the present invention, the insulator spacer for an LPIT having an embedded mesh-type voltage sensor comprises: multiple shield rings arranged in a triangular structure and connected to each other, a conductor support unit being formed through the inside of each insulator spacer; and mesh-type voltage sensors positioned on the inner circumferential surfaces of the conductor support units in the shield rings and fixed in a close-contact manner by silicon. The present invention has an advantageous effect in that the mesh type voltage sensors can be uniformly bonded to the insides of the shield rings without an air gap by a mesh structure, and can be fixed and supported to maintain a predetermined position, thereby significantly preventing the occurrence of partial discharge (PD), and thus greatly improving product performance.

Description

Insulating spacer for LPIT with built-in mesh voltage sensor

[0001] The present invention relates to an insulating spacer for LPIT having a built-in mesh-type voltage sensor, and more particularly, to an insulating spacer for LPIT having a built-in mesh-type voltage sensor, which applies a mesh-type voltage sensor (VD: Voltage device) for measuring voltage when manufacturing a spacer for LPIT (Low power instrument transformer) for ultra-high voltage GIS, and which can support the epoxy insulator of the spacer while simultaneously fixing the voltage sensor and the spacer so that they do not come off from each other.

[0002] In general, gas-insulated switchgear is an electrical device installed between the power supply side and the load side of an electric system to safely cut off the current when the circuit is opened or closed artificially under normal current conditions or when an abnormal current such as a ground fault or short circuit occurs in the circuit, thereby protecting the power system and load equipment. It is mainly used in ultra-high voltage equipment.

[0003] These gas-insulated switchgear (GIS) are generally composed of a bushing unit that receives power from a high-voltage power source, a circuit breaker (CB), a disconnector switch, an earthing switch, a moving part, and a control part.

[0004] Additionally, a spacer is provided between each of the above units to divide the compartments and maintain insulation while supporting the conductor used in the conductive path.

[0005] FIG. 1 is a drawing showing a front view of an insulating spacer shield ring for LPIT according to the prior art, FIG. 2 is a drawing showing a cross-section of the insulating spacer shield ring for LPIT shown in FIG. 1, and FIG. 3 is a drawing showing a cross-section of a main part of the insulating spacer shield ring for LPIT.

[0006] Referring to FIGS. 1 to 3, in the case where the insulator spacer (1) for LPIT must have a current sensor (Rogoski coil) for detecting current and a voltage sensor (2) for detecting voltage built into the insulator, a shield ring (3) is formed at a certain position inside the insulator to maintain a fixed position inside the insulator and secure appropriate quality, and the current / voltage sensor is installed to maintain a certain height from the epoxy insulator.

[0007] In particular, the voltage sensor (2) is formed in a structure in which a rectangular flat plate shape is rolled into a round shape and is mounted inside the shield ring (3) by means of an adhesive method using silicone molding (4). The voltage sensor (2) must be evenly adhered to the adhesive surface of the shield ring (3) and there must be no gap between the adhesive surface and the voltage sensor (2) to prevent partial discharge (PD) of the spacer (1).

[0008] This bonding method is not only very difficult to bond the pressure sensor (2) to the exact location of the shield ring (3), but also has a structure in which perfect bonding between the voltage sensor (2) and the shield ring (3) is difficult, and a gap is likely to form between the two, resulting in multiple defects in the same product.

[0009] However, the insulating spacer for LPIT according to the prior art has a relatively weak adhesive strength between the shield ring and the voltage sensor inside, so when the voltage sensor is fixed with silicone molding and epoxy molding is performed, there is a problem that the high voltage performance of the insulating spacer for LPIT is degraded and partial discharge occurs due to gaps between the shield ring and the voltage sensor, gaps between the shield ring and silicone molding, and gaps between the shield ring and the insulator.

[0010] In addition, conventional insulating spacers for LPIT have many problems in securing mechanical strength due to their structure in which the adhesive strength between the shield ring and the voltage sensor is weak.

[0011] The technical problem of the present invention is to provide an insulator spacer for LPIT having a built-in mesh-type voltage sensor, which supports the mesh-type voltage sensor so that it can maintain a certain position when forming an insulator spacer for LPIT, and at the same time, fixes the mesh-type voltage sensor and a shield ring, and allows epoxy insulator to penetrate into the empty space of the voltage sensor, thereby enabling a sturdy molding during epoxy molding, thereby fixing the voltage sensor and the epoxy insulator so that they do not become detached from each other.

[0012] In addition, the technical task of the present invention is to provide an LPIT insulating spacer having a built-in mesh-type voltage sensor that can significantly improve the constructability of the LPIT insulating spacer.

[0013] The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0014] The above technical task is characterized by including a shield ring configured to be connected by arranging a plurality of shield rings in a triangular structure, each having a conductor support formed therethrough; and a mesh-type voltage sensor positioned on the inner surface of the conductor support of the shield ring and tightly fixed by silicon.

[0015] The above shield ring is characterized in that corresponding fixing grooves are formed on both left and right sides of the inner surface of the conductor support, and the mesh-type voltage sensor is characterized in that protrusions are formed on both left and right sides of the upper and lower sides so that the sensor can be inserted into and fixed into the fixing grooves.

[0016] The above-mentioned fixed groove is characterized in that it is formed at a certain height so as to accommodate the protrusion.

[0017] The above protrusion is characterized in that it is formed in a U-shaped structure at the upper and lower portions of the mesh-type voltage sensor so that the mesh-type voltage sensor is not easily detached from the shield ring after being inserted and fixed in the fixing groove.

[0018] The above mesh-type voltage sensor is characterized in that, when the spacer is epoxy-molded, an epoxy insulator penetrates into the empty space on the surface, thereby enabling a solid molding without a gap between the insulators.

[0019] According to the present invention, a mesh-type voltage sensor is fixed and supported to maintain a constant position by being evenly adhered to the inside of a shield ring without any gaps by a mesh structure, thereby significantly reducing the occurrence of partial discharge (PD) and significantly improving product performance, which has the useful effect of significantly reducing the occurrence of partial discharge (PD).

[0020] In addition, there is also an effect of being able to manufacture an insulator spacer for LPIT with precise accuracy by fixing the spacer body and the mesh-type voltage sensor to each other by the epoxy insulator during the epoxy molding of the spacer so that they do not come off from each other.

[0021] In addition, the installation of the mesh-type voltage sensor and the production of the shield ring can be simplified into a single process, which has the effect of significantly improving the constructability of the insulating spacer for LPIT.

[0022] Figure 1 is a drawing showing the front view of an insulating spacer shield ring for LPIT according to the prior art.

[0023] Fig. 2 is a drawing showing a cross-section of an insulating spacer shield ring for LPIT according to the prior art.

[0024] Fig. 3 is a drawing showing a cross-sectional view of a main part of an insulating spacer shield ring for LPIT illustrated in Fig. 2.

[0025] FIG. 4 is a drawing showing the front view of an insulating spacer shield ring for LPIT according to the present invention.

[0026] FIG. 5 is a drawing showing a cross-section of an insulating spacer shield ring for LPIT according to the present invention.

[0027] Fig. 6 is a drawing showing a cross-section of a shield ring constituting an insulating spacer for LPIT according to the present invention.

[0028] Fig. 7 is a drawing showing a cross-section of a mesh-type voltage sensor mounted inside a shield ring according to the present invention.

[0029] Figure 8 is a drawing showing the combined state of a shield ring and a mesh-type voltage sensor according to the present invention.

[0030] Fig. 9 is a drawing showing a cross-sectional view of a main part of the insulating spacer shield ring for LPIT illustrated in Fig. 8.

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, in describing the present invention, descriptions of functions or configurations already known will be omitted to clarify the gist of the present invention.

[0032] FIG. 4 is a drawing showing a front view of an insulating spacer for LPIT according to the present invention, and FIG. 5 is a drawing showing a cross-section of an insulating spacer for LPIT according to the present invention.

[0033] Referring to FIGS. 4 and 5, an insulating spacer (10) for LPIT with a built-in mesh-type voltage sensor according to the present invention is configured to include a shield ring (20) and a mesh-type voltage sensor (30).

[0034] Here, the insulating spacer (10) for LPIT according to the present invention is configured such that a plurality of shield rings (20) are arranged in a triangular structure and connected to each other.

[0035] Fig. 6 is a drawing showing a cross-section of a shield ring constituting an insulating spacer for LPIT according to the present invention.

[0036] Referring to Fig. 6, a shield ring (20) has a conductor support portion (22) formed therethrough. The conductor support portion (22) provides a space in which a conductor (not shown in the drawing) is coupled. At this time, the entire side of the conductor is bonded to the conductor support portion (22) to improve insulation and durability when coupled with the conductor.

[0037] The shield ring (20) has corresponding fixing grooves (24) formed on both the upper and lower left and right sides of the inner surface of the conductor support (22). The fixing grooves (24) are formed to provide a space in which the protrusions (32) of the mesh-type voltage sensor (30) can be inserted and fixed on both the left and right sides of the conductor support (22). At this time, the fixing grooves (24) can be formed to a certain size so as to sufficiently accommodate the protrusions (32) of the mesh-type voltage sensor (30).

[0038] Fig. 7 is a drawing showing a cross-section of a mesh-type voltage sensor mounted inside a shield ring according to the present invention.

[0039] Referring to Fig. 7, the mesh-type voltage sensor (30) is installed so as to be fixed in an insulated and tightly sealed manner by silicone (40) so as to be positioned at a certain position on the inner surface of the conductor support (22) of the shield ring (20).

[0040] To this end, the mesh-type voltage sensor (30) is formed in a mesh shape having an overall hexagonal mesh structure, and a protrusion (32) that can be inserted into and fixed into a fixing groove (24) on both the left and right sides of the upper and lower parts is formed.

[0041] These protrusions (32) are formed in a roll-up structure to facilitate adhesion between the shield ring (20) and the silicon (40), so that they can be in maximum contact with the shield ring (20) within the fixing groove (24), and accordingly, the mesh-type voltage sensor (30) can be fixed to a certain position on the inner surface of the shield ring (22) and stably supported.

[0042] The protrusion (32) is formed in a U-shaped structure on the upper and lower parts of the mesh-type voltage sensor (30), and accordingly, when the mesh-type voltage sensor (30) is fixed to the inner surface of the conductor support (22) of the shield ring (20), it is possible to prevent it from being easily detached from the shield ring (20).

[0043] That is, the mesh-type voltage sensor (30) can be firmly fixed by having the protrusion (32) inserted into the fixing groove (24) of the shield ring (20), thereby preventing the electric field relaxation effect and detachment from the shield ring (20).

[0044] FIG. 8 is a drawing showing a combined state of a shield ring and a mesh-type voltage sensor according to the present invention, and FIG. 9 is a drawing showing a cross-sectional view of a main part of an insulating spacer for LPIT shown in FIG. 8.

[0045] Referring to FIGS. 8 and 9, the insulating spacer (10) for LPIT is fixed by being pressed against the silicon (40) in a state where the protrusion (32) is inserted into the fixing groove (24) and positioned to be in maximum contact when the mesh-type voltage sensor (30) and the shield ring (20) are combined, thereby being supported to maintain a certain position inside the shield ring (20) and being fixed to the shield ring (20) so as to maintain an equal distance from the conductor.

[0046] In addition, when the LPIT insulating spacer (10) is formed with epoxy, the epoxy insulating material can penetrate into the empty space of the mesh-type voltage sensor (30), thereby enabling a sturdy molding that can fix the mesh-type voltage sensor (30) and shield ring (20) as well as the voltage sensor and epoxy insulating material (not shown in the drawing) so that they do not come off from each other.

[0047] In addition, when manufacturing a shield ring (20), the mesh-type voltage sensor (30) can be fixed tightly to the inside of the shield ring (20) by means of silicon (40), thereby simplifying the installation of the mesh-type voltage sensor (30) and the manufacturing of the shield ring (20) into a single process, thereby significantly improving the constructability of the insulating spacer (10) for LPIT.

[0048] As described above, the insulating spacer for LPIT with a built-in mesh-type voltage sensor according to the present invention can significantly reduce the occurrence of partial discharge (PD) of the spacer (10) by fixing and supporting the mesh-type voltage sensor (30) so that it maintains a constant position by being evenly adhered to the inside of the shield ring (20) without any gaps by the mesh structure.

[0049] In addition, the LPIT insulating spacer with a built-in mesh-type voltage sensor according to the present invention can manufacture a spacer (10) of excellent quality by fixing the spacer body (20) and the mesh-type voltage sensor (30) to each other by the epoxy insulator during epoxy molding of the spacer (10) so that they do not come off from each other.

[0050] In addition, the insulating spacer for LPIT with a built-in mesh-type voltage sensor according to the present invention can greatly improve the constructability of the spacer (10) by simplifying the installation of the mesh-type voltage sensor (30) and the production of the shield ring (20) into a single process.

[0051] While specific embodiments of the present invention have been described and illustrated above, it will be apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications or variations should not be understood individually from the technical spirit or perspective of the present invention, and such modified embodiments should fall within the scope of the claims of the present invention.

Claims

1. A shield ring configured to be connected by arranging a plurality of them in a triangular structure, and each inner portion having a conductor support formed through it; and A mesh-type voltage sensor, characterized in that it includes a mesh-type voltage sensor positioned on the inner surface of the conductor support of the shield ring and fixed in a close contact manner by silicon; Insulating spacer for LPIT with built-in mesh voltage sensor.

2. In paragraph 1, The above shield ring is characterized in that fixing grooves corresponding to each other are formed on both left and right sides of the inner surface of the conductor support, and the mesh-type voltage sensor is formed with protrusions that can be inserted into and fixed into the fixing grooves on both left and right sides of the upper and lower portions. Insulating spacer for LPIT with built-in mesh voltage sensor.

3. In paragraph 2, The above fixed home, Characterized in that it is formed to a certain size so as to accommodate the above protrusion. Insulating spacer for LPIT with built-in mesh voltage sensor.

4. In paragraph 2 or paragraph 4, The above protrusion is, The mesh-type voltage sensor is characterized in that, after being inserted and fixed into the fixing groove, a U-shaped structure is formed protruding at the upper and lower portions of the mesh-type voltage sensor so that it does not easily detach from the shield ring. Insulating spacer for LPIT with built-in mesh voltage sensor.

5. In paragraph 1, The above mesh-type voltage sensor, The above spacer is characterized in that a strong molding is possible by the epoxy insulator penetrating into the empty space on the surface during epoxy molding. Insulating spacer for LPIT with built-in mesh voltage sensor.

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