High-voltage current transformer structure

Abstract

The utility model discloses a high-voltage current transformer structure, which belongs to the technical field of circuit elements and comprises an insulating shell, a primary winding and a secondary iron core coil are respectively arranged in the insulating shell, a primary wiring terminal connected with the primary winding is arranged at one end of the outer side of the insulating shell close to the primary winding, and a secondary wiring terminal connected with the secondary iron core coil is arranged at the other end of the insulating shell close to the secondary iron core coil. One end, close to the primary wiring terminal, of the outer side of the insulating shell is provided with an insulating partition plate, one end, close to the secondary iron core coil, of the outer side of the insulating shell is provided with a secondary wiring insert connected with the secondary iron core coil, and the insulating shell comprises a first wrapping section and a second wrapping section; and one end of the primary winding is arranged in the first wrapping section. According to the internal winding structure of the high-voltage current transformer, on the premise that the insulation thickness of epoxy resin mixed glue of a product is guaranteed, redundant epoxy resin mixed glue is removed, the creepage ratio of the surface of the product is optimized, and the effective surface creepage distance of the high-voltage current transformer is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit elements, and in particular relates to a high-voltage current transformer structure. Background Art

[0002] The existing high-voltage current transformer epoxy resin mixed glue insulation material casting product structure is cast by epoxy resin mixed insulation material, and its appearance structure is straight cylinder. It has the disadvantages of less surface shed skirts, limited use environment, and large consumption of epoxy resin mixed glue insulation material. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-voltage current transformer structure in view of the deficiencies of the above-mentioned prior art. According to the internal winding structure of the high-voltage current transformer, while ensuring the insulation thickness of the epoxy resin mixed glue of the product, the excess epoxy resin mixed glue is removed, the surface creepage ratio of the product is optimized, and the effective surface creepage distance of the high-voltage current transformer is improved.

[0004] The technical solution adopted by the utility model is: a high-voltage current transformer structure, including an insulating shell, wherein a primary winding and a secondary iron core coil are respectively arranged inside the insulating shell, a primary terminal connected to the primary winding is arranged at one end of the outer side of the insulating shell close to the primary winding, an insulating partition is arranged at one end of the outer side of the insulating shell close to the primary terminal, and a secondary wiring insert connected to the secondary iron core coil is arranged at one end of the outer side of the insulating shell close to the secondary iron core coil, the insulating shell includes a first wrapping section and a second wrapping section, one end of the primary winding is arranged in the first wrapping section, a plurality of first sheds are arranged on the outer side of the first wrapping section, the secondary iron core coil is arranged in the second wrapping section, the second wrapping section includes a plurality of sub-wrapping sections with different diameters, the outer diameters of the plurality of sub-wrapping sections decrease successively from the middle to both sides, and a second shed is arranged on the outer side of each sub-wrapping section.

[0005] In one embodiment, the insulating shell is cast by epoxy resin mixed with insulating material.

[0006] In one of the embodiments, a fixing piece is provided between the insulating partition and the first wrapping section, and the primary wiring terminal is arranged on the fixing piece.

[0007] In one of the embodiments, a mounting base plate is provided at one end of the secondary wiring insert away from the insulating housing.

[0008] In one embodiment, the outer diameters of the first sheds are consistent.

[0009] In one embodiment, the outer diameters of the second umbrella skirts are all greater than the outer diameter of the first umbrella skirt.

[0010] In one embodiment, a groove is provided between two adjacent first umbrella skirts and second umbrella skirts.

[0011] The beneficial effects of the utility model are:

[0012] According to the internal winding structure of the high-voltage current transformer, under the premise of ensuring the insulation thickness of the epoxy resin mixed glue of the product, the excess epoxy resin mixed glue is removed, the surface creepage ratio of the product is optimized, and the effective surface creepage distance of the high-voltage current transformer is improved; the improved high-voltage current transformer not only saves the consumption of epoxy resin mixed glue insulation material and reduces the weight of the product, but also increases the surface shed of the high-voltage current transformer and optimizes the surface creepage ratio, improves the effective surface creepage distance of the high-voltage current transformer, enhances the electrical insulation performance of the product, and broadens the product's use environment range (such as: areas with serious environmental pollution, high altitude areas, etc.). BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the utility model.

[0015] In the figure: 1. insulating shell; 2. primary winding; 3. secondary iron core coil; 4. primary terminal; 5. insulating partition; 6. secondary wiring insert; 7. fixing piece; 8. mounting base plate; 101. first wrapped section; 102. second wrapped section; 103. first umbrella skirt; 104. second umbrella skirt; 105. groove. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1 and Figure 2As shown, a high-voltage current transformer structure comprises an insulating shell 1, wherein a primary winding 2 and a secondary iron core coil 3 are respectively arranged inside the insulating shell 1, a primary terminal 4 connected to the primary winding 2 is arranged at one end of the outer side of the insulating shell 1 close to the primary winding 2, an insulating partition 5 is arranged at one end of the outer side of the insulating shell 1 close to the primary terminal 4, a secondary wiring insert 6 connected to the secondary iron core coil 3 is arranged at one end of the outer side of the insulating shell 1 close to the secondary iron core coil 3, the insulating shell 1 comprises a first wrapping section 101 and a second wrapping section 102, one end of the primary winding 2 is arranged in the first wrapping section 101, a plurality of first sheds 103 are arranged on the outer side of the first wrapping section 101, the secondary iron core coil 3 is arranged in the second wrapping section 102, the second wrapping section 102 comprises a plurality of sub-wrapping sections with different diameters, the outer diameters of the plurality of sub-wrapping sections decrease successively from the middle to both sides, and a second shed 104 is arranged on the outer side of each sub-wrapping section.

[0018] In this embodiment, the insulating shell 1 is cast by epoxy resin mixed insulating material.

[0019] In this embodiment, a fixing member 7 is provided between the insulating partition 5 and the first wrapping section 101 , and the primary wiring terminal 4 is arranged on the fixing member 7 .

[0020] In this embodiment, a mounting base plate 8 is provided at one end of the secondary wiring insert 6 away from the insulating housing 1 .

[0021] In this embodiment, the outer diameters of the first sheds 103 are consistent.

[0022] In this embodiment, the outer diameters of the plurality of second umbrella skirts 104 are all greater than the outer diameter of the first umbrella skirt 103 .

[0023] In one embodiment, a groove 105 is provided between two adjacent first umbrella skirts 103 and second umbrella skirts 104 .

[0024] The insulating partition 5 is an epoxy resin mixed glue partition, the purpose of which is to improve the phase-to-phase air insulation performance of the product during use and increase the creepage distance between the product's high potential and the product installation base plate 8.

[0025] The fixing member 7 is used to fix the primary terminal 4 of the product. The material of the fixing member 7 is epoxy resin insulating mixed glue. The primary terminal 4 is connected to the primary winding 2 inside the insulating housing 1 .

[0026] The first wrapping section 101 is an epoxy resin mixed glue insulation layer that wraps the primary winding 2 of the product. It is greatly reduced while meeting the insulation performance requirements and plays a role in supporting the primary terminal 4. The surface has a first umbrella skirt 103.

[0027] The second wrapping section 102 is an insulating layer of epoxy resin mixed glue insulating material that wraps the outer diameter surface of the product's annular secondary iron core coil 3. The outer epoxy resin insulating structure of the product is designed along the outer diameter arc of the secondary iron core coil 3 to form a waist drum shape, and excess epoxy resin mixed glue insulating material is removed.

[0028] The first shed 103 and the second shed 104 mainly increase the surface creepage distance of the product and improve the insulation performance of the product when used in dirty and high-altitude areas.

[0029] A groove 105 is provided between two adjacent first sheds 103 and second sheds 104. The groove 105 is the spacing between the first shed 103 and the second shed 104. On the one hand, it is the entity of the product, and on the other hand, it is used to adjust the creepage ratio between the first shed 103 and the second shed 104 to achieve the effectiveness of the creepage distance on the surface of the product, and truly improve the ability of the product to resist the influence of the use environment.

[0030] The high-voltage current transformer structure described in the utility model removes excess epoxy resin mixed glue on the premise of ensuring the insulation thickness of the epoxy resin mixed glue of the product by reasonably setting the outer diameters of the first wrapped section 101, the second wrapped section 102, the first shed 103 and the second shed 104, optimizes the surface creepage ratio of the product, and improves the effective surface creepage distance of the high-voltage current transformer; within the limited height range of the product, the effective creepage distance of the product surface is designed to be the maximum value, ensuring that the sheds on the surface of the product can block the flashover of the arc when the product is undergoing relevant tests or operation. If arc flashover occurs on the surface of the product, the flashover path is along the root of the shed of the product instead of skipping the root and directly flashing along the outermost tops of the two sheds.

[0031] At the same time, the improved high-voltage current transformer not only saves the consumption of epoxy resin mixed glue insulation materials and reduces the weight of the product, but also increases the surface shed of the high-voltage current transformer and optimizes the surface creepage ratio, thereby improving the effective surface creepage distance of the high-voltage current transformer, enhancing the electrical insulation performance of the product, and broadening the product's use environment range (such as areas with serious environmental pollution, high altitude areas, etc.).

[0032] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A high voltage current transformer structure, characterized in that: The invention comprises an insulating shell (1), wherein a primary winding (2) and a secondary iron core coil (3) are respectively arranged inside the insulating shell (1), a primary wiring terminal (4) connected to the primary winding (2) is arranged at one end of the outer side of the insulating shell (1) close to the primary winding (2), an insulating partition (5) is arranged at one end of the outer side of the insulating shell (1) close to the primary wiring terminal (4), a secondary wiring insert (6) connected to the secondary iron core coil (3) is arranged at one end of the outer side of the insulating shell (1) close to the secondary iron core coil (3), the insulating shell (1) comprises a first wrapping section (101) and a second wrapping section (102), one end of the primary winding (2) is arranged in the first wrapping section (101), a plurality of first sheds (103) are arranged on the outer side of the first wrapping section (101), and the secondary iron core coil (3) is arranged in the second wrapping section (102). Inside the wrapping section (102), the second wrapping section (102) comprises a plurality of sub-wrapping sections with different diameters, the outer diameters of the plurality of sub-wrapping sections decreasing from the middle to both sides, and a second shed (104) is provided on the outer side of each sub-wrapping section. The insulating shell (1) is cast from epoxy resin mixed insulating material, a fixing member (7) is provided between the insulating partition (5) and the first wrapping section (101), the primary wiring terminal (4) is arranged on the fixing member (7), and a mounting base (8) is provided at one end of the secondary wiring insert (6) away from the insulating shell (1). The outer diameters of the plurality of first sheds (103) are the same, the outer diameters of the plurality of second sheds (104) are all larger than the outer diameter of the first shed (103), and a groove (105) is provided between two adjacent first sheds (103) and second sheds (104).

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