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Split type diameter expanded lead for extra high tension onsite test

A technology of splitting wires and expanding diameter wires, applied in conductors, insulated conductors, testing dielectric strength, etc., can solve the problem of threats to the safety of the tested equipment and testers, the large wind load of aluminum foil expanded diameter wires, and the difficulty of applying partial discharge. Test and other issues to achieve the effect of ensuring strength, excellent tensile strength and simple structure

Pending Publication Date: 2019-02-22
STATE GRID HUBEI ELECTRIC POWER RES INST +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the on-site handover test and diagnostic test, due to the harsh test conditions on site, strong winds, sandstorms and other weather often occur, aluminum foil expanded diameter conductors have large wind loads, severe wind deflection, and severe swings, and it is easy to appear during use. Damage, fracture, high wear rate, difficult to be used repeatedly, and even potential hidden dangers that threaten the safety of the tested equipment, test equipment and test personnel during the test
In addition, the surface of the aluminum foil diameter expansion test wire is easy to wear, scratches and burrs are easy to appear during use, and it is difficult to maintain a smooth surface condition. Strong corona and even intermittent discharge will occur during the test, which is difficult to apply to higher requirements for corona suppression. partial discharge test

Method used

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  • Split type diameter expanded lead for extra high tension onsite test
  • Split type diameter expanded lead for extra high tension onsite test
  • Split type diameter expanded lead for extra high tension onsite test

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Embodiment Construction

[0038] Such as figure 1 and figure 2 A split-type expanded-diameter conductor used in UHV field tests shown is characterized in that: the split-expanded-diameter conductor includes at least two spacer discs 1 and multiple groups of split-diameter conductors, and the spacer discs 1 are pipe diameters The ring diameter is 550-600mm made of 16-18mm hollow aluminum tube, and the distance between the spacers 1 distributed on the split wires is 0.8-2m, and the optimal distance is 1-1.5m. There are 8 to 16 groups of split wires, each group of split wires is composed of 2 to 4 sub-wires 2, and the radius of each sub-wire 2 is 1 mm to 1.5 mm; ~16 groups, and 8~16 groups of split wire perforations are equidistantly distributed on the position near the outer edge of the spacer plate 1. Each group of split wire perforations includes 2 to 4 sub-conductor holes 3 with a spacing of 5-10 mm. Each sub-conductor hole The aperture of 3 is equal to the diameter of wire 2. Each sub-wire in the...

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Abstract

The invention provides a split type diameter expanded lead for extra high tension onsite test. The split type diameter expanded lead comprises at least two spacer discs and groups of split leads, eachgroup of split leads is composed of at least two sub leads, each spacer disc is provided with groups of split lead through holes correspondingly, the groups of split lead through holes are distributed annularly in the spacer disc, each group of split lead through holes includes at least two sub lead holes, each sub lead penetrates the corresponding sub lead through hole in each spacer disc, the spacer discs are fixed to the groups of split leads separately, and the two ends of each split lead are fixed via conductive wire pressing plates respectively. Splitting in different sizes are combinedto improve the equivalent radius of the diameter expanded lead effectively and reduce the surface field intensity of the lead, the weight of the lead is reduced via special material and structure, and the split type diameter expanded lead can be used for partial discharge test with strict requirements for the corona and partial discharge amount as well as for insulation test.

Description

technical field [0001] The invention relates to a wire, in particular to a split-type expanded-diameter wire used in UHV field tests. Background technique [0002] In the insulation test of UHV electrical equipment, due to the high test voltage, severe corona discharge is prone to occur between the test equipment with high voltage and the test wire connecting the test equipment and the tested product, which will lead to the quality of the test circuit. If the factor is reduced and the loss is increased, if measures are not taken to limit it, the test may not be completed successfully. [0003] The corona loss of the circuit is one of the main losses in the insulation test of UHV electrical equipment, and the connecting wire that meets the test requirements is an essential part of the UHV insulation test. Traditionally, the expansion test wire made of aluminum foil can increase the corona inception voltage of the test wire, reduce the surface field strength of the wire, and ...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R1/24H01B7/17H01B7/18H01B7/28H01B7/40
CPCH01B7/17H01B7/18H01B7/28H01B7/2806H01B7/40G01R1/24G01R31/1227
Inventor 李劲彬陈隽吴传奇张杰黄天顺任劼帅夏天汪涛谢齐家张致白尧刘宝宏
Owner STATE GRID HUBEI ELECTRIC POWER RES INST
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