Dividing type electronic voltage transformer of single-phase capacitor

Abstract

The invention relates to a dividing type electronic voltage transformer of a single-phase capacitor, which is used in an electric industry. The voltage transformer consists of a shell, a base, a bracket, an intermediate electrode, an insulating support, a high-voltage electrode, a terminal box, a disk type insulator, an explosion-proof device, an upper screening ring, a lower screening ring and a grounding electrode, wherein the shell is fixedly mounted on the base; the insulating support is fixedly mounted on the base; the grounding electrode is fixedly mounted on the insulating support; the disk type insulator is fixedly arranged on the shell; the high-voltage electrode is connected with the disk type insulator and arranged in an inner cavity of the intermediate electrode; and the intermediate electrode, the upper screening ring and the lower screening ring are fixedly mounted on the grounding electrode respectively. As the intermediate electrode, the upper screening ring, the lower screening ring and the shell are made of an aluminum alloy with a low expansion coefficient, the fluctuation of data detection caused by material expansion is reduced; and furthermore, the high-voltage electrode is designed in an arc and cylindrical structure and ports of the intermediate electrode, the upper screening ring and the lower screening ring are designed in an arc transition shape, so that the marginal discharge is reduced.

Description

technical field [0001] The invention relates to a voltage transformer used in the electric power industry, in particular to a single-phase capacitive voltage dividing type electronic voltage transformer. Background technique [0002] After retrieving relevant patent documents, no single-phase capacitive voltage-dividing electronic voltage transformer with the same structure as the present invention has been retrieved. The power industry generally needs to use voltage transformers when measuring the voltage in the system or performing relay protection. Existing voltage transformers are generally electromagnetic voltage transformers. This type of transformer has a complex structure, a large volume, and a narrow frequency band. At the same time, because it uses electromagnetic induction, it needs to have an iron core, so magnetic saturation occurs. Although the existing electronic voltage transformer overcomes the defects of the iron core used in the traditional electromagneti...

AI Technical Summary

Problems solved by technology

The existing voltage transformers are generally electromagnetic voltage transformers. Due to their complex structure, large volume and narrow frequency band, and because they need to have iron cores for electromagnetic induction, magnetic saturation will occur.

Although the existing electronic voltage transformer overcomes the defects of the iron core used in the traditional electromagnetic transformer, making it significantly smaller in size and lighter in weight, but also has many deficiencies in its shielding and anti-interference due to its structure. , so it is necessary to improve the existing electronic voltage transformers to better meet the actual needs of production

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