Tool special for T head cable test

Abstract

The invention relates to a special instrument for T-head cable testing, consisting of a conducting rod (2) and a fastening part (1); the conducting rod is provided with a screw (7), the left end of the rod is connected with a draw-in gear (6) and the other end is connected with a fixed pin (8), the draw-in gear and the fixed pin are both good conductors; the insulated fastening part (1) is connected with a good conductor nut (3) which is connected and matched with the screw (7) of the conducting rod. When in use, the draw-in gear (6) is extended into the insulating bush of the T-head cable tohook a press line nose (10) and the high-voltage testing can be implemented with the fastening part screwed tightly. The special instrument is portable and flexible, safe and stable and convenient for operation, can greatly bring down the labor strength and operation risk for operating staff, improve the testing ageing of the T-head cable and ensure the testing safety as well as the accuracy of testing data.

Description

technical field [0001] The invention belongs to the technical field of electric power transmission, and in particular relates to a special tool for T-head cable test. Background technique [0002] Due to the increasingly widespread application of box-type transformers and high-voltage branch boxes, the test of T-head cables in high-voltage branch boxes and box transformers has become an important task for high-voltage tests. Due to the special structure of the T-head cable and the lack of special test tools, the test of the T-head cable has become a new problem in the high-voltage test work. [0003] The previous test method is to connect the aluminum strip to the pressure wire nostril in the T-head, and then lead the conductive part out of the T-head to carry out the pressure test. Moreover, the insulation distance between the aluminum strip and the T-head is not enough. We use heat to test it. Shrink the insulation tube to solve the insulation problem. Therefore, there a...

AI Technical Summary

Problems solved by technology

[0003] The previous test method is to connect the aluminum strip to the pressure wire nostril in the T-head, and then lead the conductive part out of the T-head to carry out the pressure test. Moreover, the insulation distance between the aluminum strip and the T-head is not enough. We use heat to test it. Shrink insulation tube to solve insulation problem

Therefore, there are many shortcomings and troubles in the past test methods:

[0004] First of all, it is very difficult to fix the aluminum strip on the cable head. It is not only time-consuming but also the contact is not reliable. Due to poor contact, it directly affects the accuracy of the test data.

Secondly, the insulation distance between the aluminum strip and the T-shaped casing wall is not enough. Simply installing an insulating sleeve on the aluminum strip cannot fundamentally solve the insulation problem, because the insulation strength of this insulating sleeve is small, and the test The leakage current is large, and the safety of the test and the accuracy of the data cannot be guaranteed

[0005] Due to the existence of the above problems, when conducting handover or preventive tests on T-head cables, if the test data is unqualified, it is difficult for the test personnel to judge whether it is the problem of the cable itself or the production of the cable head, or the problem of our test tools and test methods.

In order to avoid misjudgments, testers often have to test repeatedly several times, which is time-consuming and laborious, and once misjudgments occur, it will lead to waste of materials and even delays in the construction period

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