三相三线有功电能表检查方法的研究

电能计量装置错误接线方式有几百种,在实际检查和分析错误接线时,一般都采用＂逐步逼近法＂,即先通过对电压、电流回路的检查,使电压、电流回路发生错误接线的几率大大降低。其中电压回路的错误接线方式可通过万用表和相序表排除;电流回路的错误接线方式可通过力矩法或相位伏安表法判断。本文以供电系统中普遍采用的高压三相三线电能计量装置为例,通过两种不同的方法,分析各种方法在检查错误接线时所适用范围与检查步骤,以便工作中及时更正错误接线,使电能计量准确、可靠。

Study on inspecting ways of three-phase three-wire energy meters

The wiring errors methods of electric energy measurement device have several hundred ways. Commonly we use step-by-step approaching method in inspecting and analysis of wiring errors. The probability will greatly reduce by examination on voltage,electric current loop. The wiring errors methods of voltage loop will eliminate by multimeter and phase angle table; the wiring methods of electric current loop will judge though moment way or phase volt-ampere way. This paper takes example for three-phase three -wire energy meters used in power supply system, and analyze the applicable ranges and inspecting steps of various methods in inspecting wiring errors, in order to correct wiring errors in time,making energy measurement exact and credible.