Medium-voltage cable accessory defect model based on RTV coatings
A technology of defect model and cable accessories, which is applied in the installation of cable accessories, electrical components, cables, etc., can solve the problems of simulation analysis and processing of frequent failures of medium-voltage cables, and achieve the goal of improving power supply reliability and reducing operation and maintenance costs Effect
Active Publication Date: 2014-09-24
STATE GRID CORP OF CHINA +1
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[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a defect model of medium voltage cable accessories based on RTV coating, and solve the simulation analysis and processing problems of multiple faults in the construction process of medium voltage cables
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[0021] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0022] A defect model for medium-voltage cable accessories based on RTV coatings, such as Figure 1 to Figure 4 As shown, it includes a main insulator 1 and an insulating shielding layer 3. The insulating shielding layer is arranged at both ends of the main insulator, and the cables at both ends are connected by conductor crimping tubes 5, and the outside is covered with a cold-shrinkable intermediate joint 8. The cold-shrinkable intermediate joint Made of transparent silicone rubber, with one of the following four defects on the main insulator, insulating shielding layer and cold shrink intermediate joint:
[0023] Such as figure 1 As shown, there is an air gap 2 between the conductor crimping tube and the main insulator, and the air gap is filled by RTV, which constitutes the air gap defect model between the conductor crimping tube and the m...
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The invention relates to a medium-voltage cable accessory defect model based on RTV coatings. The medium-voltage cable accessory defect model is mainly characterized by comprising a main insulator, insulation shielding layers, a conductor crimping pipe and a cold-shrink intermediate connector, wherein the insulation shielding layers are arranged at the two ends of the main insulator, and after cables at the two ends are connected through the conductor crimping pipe, the cold-shrink intermediate connector is located outside the whole. The main insulator, the insulation shielding layers and the cold-shrink intermediate connector are provided with one of four defect models, wherein the four detect models are defect model for the air gap between the conductor crimping pipe and the main insulator, the defect model for semiconductive fracture scratches, the defect model for main insulator scratches and the waterproof defect model. The cold-shrink intermediate connector made of transparent silicone rubber is adopted for simulating problems prone to occurring in the on-site construction process of the medium-voltage cables, the effects of handling different types of defects are verified by using RTV for handling the defects, a foundation is laid for contrastively analyzing tests in the later stage and summarizing methods for eliminating the defects and potential hazards, and the medium-voltage cable accessory defect model is of important significance in improving power supply reliability of the cables and reducing operation and maintenance cost.
Description
technical field [0001] The invention belongs to the technical field of medium-voltage cables, in particular to a defect model of medium-voltage cable accessories based on RTV paint. Background technique [0002] With the development of the power grid, the use of medium voltage (rated voltage 6 ~ 35kV) cable accessories is increasing year by year, and cable accessories often fail during operation. The quality of cable accessories running in the power grid depends on many factors, including design, product quality, construction and installation process, and cable line operating conditions. With the continuous development of modern technology and the continuous improvement of material technology and production technology, the probability of failure caused by the quality of the product itself is less and less, and the quality of on-site installation has directly affected the failure rate of medium-voltage cable accessories. Contents of the invention [0003] The purpose of th...
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IPC IPC(8): H02G15/00
Inventor 朱晓辉李旭郭勇
Owner STATE GRID CORP OF CHINA