Insulator with built-in capacitor evt component and its processing method

Abstract

The invention relates to an insulator with a built-in capacitor EVT component and a processing method thereof. A voltage equalizing cover is added at the upper and lower ends of the EVT to prevent uneven electric fields. A silicone rubber sealing ring is added, the pressure equalizing cover is opened, and the countersunk screw and the EVT grounding insert are screwed together to realize electrical connection. The insulator grounding insert can be welded on the equalizing cover through a vertical wire. The process is simplified. A small sealing ring is arranged in the pressure equalizing cover hole to prevent epoxy from entering during casting. The countersunk head screw is screwed into the head of the high and low pressure insert to increase the sealing ring and relieve the stress at the high and low pressure insert. The EVT signal insert is welded together with the Z-shaped soft wire and the signal insert in the insulator. The flexible wire is easy to install and produce in the mold and is not easily subject to stress interference, ensuring the accuracy of signal transmission. The insulator with built-in high-precision EVT components cast by this method has strong ability to withstand external force interference and reliable performance.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of power equipment status, in particular to an insulator with a built-in capacitor EVT component and a processing method thereof. Background technique [0002] The ubiquitous power Internet of Things is the core task of implementing the national grid's "three-type, two-network, world-class" strategic goal, which requires power transmission and distribution equipment to be able to achieve comprehensive awareness of operating status and full penetration of services. This requires deep integration of primary and secondary equipment, casting high-precision EVT for secondary measurement into traditional primary equipment, and comprehensively monitoring the operation status of primary equipment. [0003] The accuracy of EVT components designed by the principle of capacitive voltage division is restricted by many factors, such as stress concentration and uneven distribution of electric field. ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of stress concentration and uneven distribution of electric field affecting the measurement accuracy that are easy to occur during the casting process of EVT components, the invention provides an insulator with built-in capacitor EVT components and its processing method. During the casting process of EVT, the upper and lower ends of the EVT increase A pressure equalizing cover is installed to prevent the uneven electric field. In order to prevent the uneven stress of the insulator from affecting the accuracy of the EVT device when the insulator is subjected to external force, a silicon rubber sealing ring is added in the equalizing cover. The threaded inserts of the terminal and the ground terminal are screwed together to realize electrical connection, and a small sealing ring is set in the hole of the pressure equalizing cover to prevent epoxy from entering during casting.

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