A Double Air Gap Iron Core Electronic Current Transformer

Abstract

The present invention provides an electronic current transformer with double air gap iron core. The electronic current transformer with double air gap iron core includes: a first double air gap iron core, on which a second An air gap and a second air gap, the connecting line between the first air gap and the second air gap passes through the center of the first double-gap iron core; the second double-gap iron core is connected to the first The double-gap iron cores are connected in series and arranged coaxially, the third air gap and the fourth air gap are set on the second double-gap iron core, and the connecting line between the third air gap and the fourth air gap passes through the The center of circle of the second double-gap iron core, and perpendicular to the connecting line between the first air gap and the second air gap; the conductor passes through the first double-gap iron core and the second double-air gap in turn The center of the gap iron core; the data processing chip is connected to the coils of the first double-air-gap iron core and the second double-air-gap iron core for receiving measurement data and performing analog-to-digital conversion on the measurement data displayed and output.

Description

technical field [0001] The invention relates to the technology of electric power system transformers, in particular to a double-air-gap iron-core electronic current transformer. Background technique [0002] The transformer is an important device to ensure the normal, safe and reliable operation of the power system. After years of development, the transformer has developed from the traditional electromagnetic transformer to today's electronic transformer, and the iron core material has developed from the original ferrite to today's nanocrystalline and amorphous materials. However, the existing current transformers cannot conveniently perform live installation measurement on site. [0003] The initial current transformer uses a closed iron core. With the development of the power system, especially the rapid increase of the short-circuit current of the power system, the saturation problem of the closed iron core under large short-circuit current becomes more and more prominen...

AI Technical Summary

Problems solved by technology

Although it can adopt a relatively flexible sensor head structure, its own birefringence problem is difficult to solve. In application, external factors such as ambient temperature and vibration have a great influence on the measurement accuracy, and it is difficult to achieve high accuracy under harsh field conditions. precision

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