To enhance the quality of manufacturing as responsibility, build national brand of measurement!
To enhance the quality of manufacturing as responsibility, build national brand of measurement!
接成Y0形的二次线圈供电给仪表、继电器及绝缘监察电压表等。辅助二次线圈接成开口三角形，供电给绝缘监察电压继电器。当三相系统正常工作时，三相电压平衡，开口三角形两端电压为零。当某一相接地时，开口三角形两端出现零序电压，使绝缘监察电压继电器动作，发出信号。用于3～220kV系统（110kV及以上无高压熔断器），供接入交流电网绝缘监视仪表和继电器用。
China's leading enterprise in variable frequency power measurement and metering
National variable frequency power measuring instrument (metering station) founder
Research and development unit of national variable frequency power metering standard