Current sampling linear mutual inductor with digital output

Abstract

A current sampling linear mutual inductor with digital output belongs to the technical field of electrical equipment. The current sampling linear mutual inductor comprises an electromagnetic induction part and an analog-to-digital signal transformational component, wherein the electromagnetic induction part comprises an insulation iron core shell; and an iron core, a secondary coil and an analog signal output wire are arranged on the iron core shell, the analog-to-digital signal transformational component comprises an analog-to-digital converter shell, an analog-to-digital conversion module and a mounting column are fixedly arranged on the analog-to-digital converter shell, a display screen and a signal output port are arranged on the analog-to-digital conversion module in a matching manner, the iron core shell and the analog-to-digital converter shell are formed at one time, and the analog signal output wire is connected with the analog-to-digital conversion module. Through adopting the technology, the obtained current sampling linear mutual inductor with the digital output is convenient to use and install on site, has good signal output quality, has strong antijamming capability and good confidentiality of a digital signal, prevents the phenomena of signal interference, attenuation and even unreceived signals which are caused by an over long output line, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment, and in particular relates to a current sampling linear transformer with digital output, which is convenient for on-site use and installation, and has high signal output quality. Background technique [0002] In the era when the country advocates energy conservation and emission reduction, electric energy is one of the issues that has always been concerned. In the power grid, the current transformer is a very important sampling transmission and monitoring access equipment. In order to ensure the safe and economic operation of the power system, it is necessary to monitor and measure the power equipment and power consumption, but the general measurement and protection devices cannot directly To connect primary high-voltage equipment, it is necessary to convert the large current of the primary system into a small current in proportion, and supply it to the measuring instrument and protec...

AI Technical Summary

Problems solved by technology

[0003] The existing measurement method is to output the analog signal to the measuring equipment and the protection device through the leads on both sides of the transformer. When the output current on the two sides is several mA, due to the weak anti-interference ability of the analog signal, the signal will It will be interfered by various noises from the outside world and inside the communication system. It is difficult to separate the noise and the signal after mixing, which will reduce the communication quality, and the longer the line, the more noise will accumulate, resulting in inaccurate measurement or faulty protection device. report and so on

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