Dividing type electronic voltage transformer of three-phase capacitor

Abstract

The invention relates to a dividing type electronic voltage transformer of a three-phase capacitor, comprising a shell, three groups of electrode devices, a base, a bracket, an explosion-proof device, a connection cable, a disk type insulator and a lead wire device, wherein the three groups of the electrode devices are arranged on the base; the shell connected with the base is arranged on the periphery of the three groups of the electrode devices; the disk type insulator is arranged on the shell; and the connection cable is arranged on the disc type insulator and respectively connected with a high-voltage electrode of the three groups of the electrode devices. As the three groups of electrode devices are respectively arranged in the shell, the structure is compact; as an arc structure is designed on the upper opening of the shell, an electric field is uniformly distributed and the outer surface has excellent self-cleaning property; the high-voltage electrode, an intermediate-voltage electrode and a grounding electrode are made of an aluminum alloy with a low expansion coefficient, and therefore, a volume becomes small and properties are stable when a temperature is changed; and ports of the high-voltage electrode, the intermediate-voltage electrode and the grounding electrode are designed in an arc transition shape, so that marginal discharge is reduced; and the connection cable is designed in a stretchable manner to reduce device damages.

Description

technical field [0001] The invention relates to a voltage transformer used in the electric power industry, in particular to a three-phase capacitive voltage dividing type electronic voltage transformer. Background technique [0002] After searching relevant patent documents, no voltage transformer with the same structure as the present invention has been found. 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 defect of using iron core in the traditional electromagnetic transformer, so that its volume is significantly reduced and...

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 defect of using iron core in the traditional electromagnetic transformer, so that its volume is significantly reduced and its weight is light, but due to its structure, its shielding and anti-interference ability is poor. Especially in the state of high-voltage three-phase, it is more difficult to meet the requirements of use, so it is necessary to improve the existing three-phase electronic voltage transformer to improve the use effect of the equipment

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