Split type diameter expanded lead for extra high tension onsite test

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 ...

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

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