Adjustable current transducer with high accuracy

Abstract

The invention discloses an adjustable current transducer with high accuracy. The adjustable current transducer comprises a case, wherein a signal transformation portion and a transformation ratio switching control portion are installed in the case, the signal transformation portion is connected with the transformation ratio switching control portion through circuits, the transformation ratio switching control portion is connected with a background monitor host through a RS485 bus, and the signal transformation portion is connected with a primary current transformer through circuits. The adjustable current transducer translates current signals collected by a traditional primary current transformer into low voltage signals within +-5V, can adjust transformation ratios on line according to the size of an electric current so as to distribute the voltage signals obtained by translating the current signals in a scope of +-5V in large magnitude mode, and therefore improves measuring accuracy, is also suitable for other electricity systems needing wide range electric current measurement, and especially has a cost advantage on transformation of traditional equipment.

Description

technical field [0001] The invention relates to a high-precision adjustable current transmitter, in particular to a method for converting current signals collected from high-voltage and high-current lines into small voltage signals for direct use by high-speed data acquisition hosts, and at the same time converting current signals The utility model relates to a high-precision current transmitter capable of real-time on-line transformation ratio conversion, which belongs to the technical field of current measurement equipment in the test and test process of high-power equipment in the power system. Background technique [0002] In the power system test station, it is often necessary to test circuit breakers, capacitors, reactors, fuses, filter devices, SVG and other equipment, and it is often necessary to detect changes in the current signal of the system during the test process. However, the voltage levels and current levels of these tests will be different, and even the sam...

AI Technical Summary

Problems solved by technology

In the traditional test station, either the transformation ratio is single and the measurement accuracy is not high; or manual wiring is required to change the transformation ratio, and the power must be cut off to wait, which is time-consuming and labor-intensive.

At the same time, with the development of modern electric power, people have higher and higher requirements for automation. This way of changing wiring on site is obviously not in line with the needs of the times in terms of safety, flexibility and aesthetics.

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