System for conducting accurate current control by means of digital-display ampere meter

一种用数显电流表进行电流精确控制的系统

Abstract

本发明提供一种用数显电流表进行电流精确控制的系统,包括三相数显电流表一只、电流互感器一组共三只、负载接触器一组及空气开关一组,所述三相数显电流表带上下限电流设置及常开、常闭报警输出点,其特征在于,所述系统还包括一只负载接触器或一只空开脱扣器,通过电流表上限报警常闭、常开点与负载接触器或空开脱扣器动作,控制负载停止工作。本发明通过采取一套精确控制线路的上电流大小的系统,来控制负载所需电流,确保电气正常运行。该控制系统具有元器件便宜且结构简单的优点。
The invention provides a system for conducting accurate current control by means of a digital-display ampere meter. The system for conducting the accurate current control by means of the digital-display ampere meter comprises the three-phase digital-display ampere meter, a set of current transformers which comprises three current transformers, a set of load contactors and a set of air switches, wherein the three-phase digital-display ampere meter has the upper-limit current and the lower-limit current and is provided with a normally-open alarm output point and a normally-closed alarm output point. The system for conducting the accurate current control by means of the digital-display ampere meter is characterized in that the system further comprises a load contactor or an air-switching releaser, and a load is controlled to stop working through action of the upper-limit normally-closed alarm output point and the normally-open alarm output point and the load contactor or the air-switching releaser. According to the system for conducting the accurate current control by means of the digital-display ampere meter, the current on a circuit can be controlled accurately to further control the current needed by the load, and then normal operation of an electric appliance is guaranteed. The system for conducting the accurate current control by means of the digital-display ampere meter has the advantages that components and parts are cheap and the structure is simple.

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