Lead and holder for withstand voltage test of high-voltage electrical equipment

Abstract

The invention belongs to the technical field of electric power transmission and transformation equipment detection, and particularly relates to a voltage application lead and a cable head holder for withstand voltage test of high-voltage electrical equipment. A lead clamp bolt at the lower end of the lead clamp is in internal thread connection with a detection device at the upper end of a leakage current self-detection device, a detection device bolt at the lower end of the leakage current self-detection device is in internal thread connection with a supporting bar at the upper end of a telescopic insulation supporting bar, internal threads of the lower portion of a supporting rod at the lower end of the telescopic insulation supporting bar is in screwed connection with a base plate bolt of a magnetic base plate, and the magnetic base plate is fixedly sucked to a casing of the equipment. The lead and the holder for withstand voltage test of high-voltage electrical equipment solve the problems that failure of voltage application and damage to equipment due to the fact that the voltage application end discharges to the ground or is grounded due to improper fixing of leads and cable heads in the withstand voltage test are solved, and the working efficiency and safe reliability of the withstand voltage test are improved.

Description

technical field [0001] The invention belongs to the technical field of detection of electric power transmission and transformation equipment, and in particular relates to a pressurized lead wire and cable head fixer used for high-voltage electric equipment withstand voltage test. Background technique [0002] With the rapid development of electric power construction, the number of applications of high-voltage electrical equipment in the power grid is increasing day by day, and the workload of high-voltage tests on them is also increasing year by year; high-voltage tests such as strict handover and random inspection before electrical equipment is put into use are important for equipment to be put into use. Secondly, routine or diagnostic high-voltage tests are also carried out on electrical equipment in daily operation. Due to factors such as substation form, equipment structure, and installation location, there is a certain spatial distance between the test equipment and the ...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of electric power construction, the number of applications of high-voltage electrical equipment in the power grid is increasing day by day, and the workload of high-voltage tests on them is also increasing year by year; high-voltage tests such as strict handover and random inspection before electrical equipment is put into use are important for equipment to be put into use. Secondly, routine or diagnostic high-voltage tests are also carried out on electrical equipment in daily operation. Due to factors such as substation form, equipment structure, and installation location, there is a certain spatial distance between the test equipment and the tested equipment. As a result, the high-voltage lead wires in the pressurization test are downward arced under the action of gravity, and the longer the distance of the lead wires, the greater the drooping range, resulting in the distance between the lead wires, the equipment shell and the surrounding objects, and the corresponding ground insulation cannot be maintained. Secondly, if there is wind during pressurization, the test lead will swing left and right. The longer the lead, the larger the swing, which will easily cause discharge to the ground or surrounding objects, and the discharge impact will easily cause damage to the pressurized equipment.

There are even some obstacles between the equipment under test and the pressurized equipment, and the electrical equipment is in the cabinet inside the box, etc., which requires the lead wire to bypass the obstacle or carry out the pressurized test when there is a certain space angle, causing the pressurized line to be damaged. The fixing work is time-consuming and labor-intensive, and there are unsafe factors. Secondly, when the withstand voltage test is performed after the new cable is manufactured, the cable head must be reliably fixed before the pressure test can be performed.

[0003] At present, according to the surrounding limitations, the testers often use dry insulating objects or insulating rod support, insulating tape or dry white cloth tape to bind and suspend the test lead several times to fix the test lead. Although this traditional fixing method can play the role of fixed support , but there are large safety risks and hidden dangers, and secondly, lead wire support, binding, etc. are time-consuming and labor-intensive, seriously affecting work efficiency

For example, if the insulating rod or insulating material is not fixed firmly, it will fall off easily and cause personal injury and equipment injury; the insulation tape is not strong enough and easy to break, and the white cloth tape is easy to be damp and many other risks; Affected by external factors, resulting in large errors in our test results

Among them, the main reason for the difference in leakage current is that the pressure lead wires are not uniformly fixed, and the large difference in leakage current seriously affects the work efficiency after repeated measurements by the test personnel.

[0004] Based on the fact that the current method of fixing the pressurized lead wire of high-voltage equipment is backward, it seriously affects the work efficiency, test quality and reliability, and there is a large safety risk. Therefore, it is urgent to develop a special pressurized lead wire fixer that can be fast, safe and reliable. Solve the problems of high-voltage equipment pressurization test efficiency, low reliability and existing safety risks

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