Extra-high voltage resin impregnated paper alternate-current and direct-current capacitance sleeve tube

Abstract

The invention discloses an extra-high voltage resin impregnated paper alternate-current and direct-current capacitance sleeve tube. The sleeve tube comprises a central conductive body, an inner capacitance core, an outer capacitance core, outer insulation members and installing flanges, the inner capacitance core and the outer capacitance core are installed on the middle conductive body, the lowerend of the inner capacitance core is inserted in the outer capacitance core, a zero screen of the outer capacitance core and a rear screen of the inner capacitance core are in equipotential bonding,the outer wall of the inner capacitance core and the outer wall of the outer capacitance core are sleeved with the outer insulation members and the installing flanges, the end of the outer capacitancecore is fixedly connected with the installing flange of the inner capacitance core, a capacitance tap is arranged on the installing flange of the outer capacitance core, and the capacitance tap is connected with the rear screen of the outer capacitance core. By means of the sleeve tube, the pouring difficulty of the main insulation capacitance core can be effectively reduced to improve the qualification rate of the insulation capacitor core, the weight is reduced, and the cost is reduced.

Description

Technical field: [0001] The invention relates to an ultra-high voltage glue-impregnated paper AC / DC capacitive bushing. Background technique: [0002] Transformer bushing is an important and most risky component of transformers, especially for UHV projects. Once major accidents such as explosion and combustion occur in traditional oil-paper capacitor bushings, it will bring immeasurable losses to transformers and power grids. Rubber-impregnated paper capacitive transformer bushings (dry-type bushings) are more and more favored by users because they are easy to use, safe to operate, and will not explode. [0003] At present, the main insulating capacitor cores of glue-impregnated paper capacitive transformer bushings (dry-type bushings) in the industry are all cast as a whole, especially for UHV products. The glue-impregnated paper capacitor cores are long in length and large in diameter, and the casting process is very It is complicated, the temperature is difficult to cont...

AI Technical Summary

Problems solved by technology

[0003] At present, the main insulating capacitor cores of glue-impregnated paper capacitive transformer bushings (dry-type bushings) in the industry are all cast as a whole, especially for UHV products. The glue-impregnated paper capacitor cores are long in length and large in diameter, and the casting process is very Complicated, the temperature is difficult to control when the reaction occurs, and the pass rate is very low. Although some products have passed the factory test, the defects are exposed during the later operation, causing more serious problems and causing heavy losses.

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