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这种仪表的设计,是为了适应230V,50Hz欧洲标准的电力配电盘。这种220V或240V的变化是最近10年期间逐渐产生的。这种仪表能精确地指示干线电压,其刻度范围从210V到
This instrument is designed to meet the 230V, 50Hz European standard power distribution panel. This 220V or 240V change is gradually generated during the last 10 years. This instrument can accurately indicate the mains voltage, the scale range from 210V to