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Adjustable current transducer with high accuracy

A technology for adjusting current and transmitters, applied in the field of high-precision adjustable current transmitters, which can solve problems such as inconsistency in flexibility and aesthetics, low measurement accuracy, waiting for power outages, etc., to achieve the benefits of measurement accuracy and installation The process is simple and the effect of improving the accuracy of measurement

Active Publication Date: 2013-06-19
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Adjustable current transducer with high accuracy
  • Adjustable current transducer with high accuracy
  • Adjustable current transducer with high accuracy

Examples

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Embodiment 1

[0019] Such as figure 1 , figure 2 , image 3 As shown, a high-precision adjustable current transmitter of this embodiment includes a chassis 18 in which a signal conversion part 19 and a ratio switching control part 20 are installed; wherein the signal conversion part 19 The ratio switching control part 20 is connected through a line; the ratio switching control part 20 is connected to the background monitoring host 30 through an RS485 bus; the signal conversion part 19 is connected to a primary current transformer 28 through a line. The signal conversion part 19 includes a secondary current transformer (using an integral resin seal) 29 and a miniature contactor; the miniature contactor includes a first miniature contactor 11, a second miniature contactor 12, and a third miniature contactor. 13, the fourth micro contactor 14, the fifth micro contactor 15, the sixth micro contactor 16, the seventh micro contactor 17; wherein the secondary current transformers are connected to t...

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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 a current signal collected from a high-voltage and large-current line into a small voltage signal for direct use by a high-speed data acquisition host, and at the same time in the process of converting the current signal A high-precision current transmitter that can transform the transformation ratio on-line in real time belongs to the technical field of current measurement equipment in the process of high-power equipment test testing in power systems. 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. However, the voltage level and current size of these tests will be different, even the same equipment will have test req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/04
Inventor 陈晓宇汪彦蔡重凯程华明李电杜俊杰秋勇朱重阳李云飞金百荣洪金琪吕丹
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO
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