On November 25, 2019, China Electric Power Research Institute (CEPRI) organized relevant units and personnel for on-site inspection of its 12kV ring main unit (box) standardized prototype at Henan Senyuan Electric Co., Ltd.. Units participating in the on-site inspection of Henan Senyuan Electric Co., Ltd. include CEPRI, EETI (National Electrical Product Quality Supervision and Inspection Center), and State Grid Henan Electric Power Company.

        The inspectors conducted the on-site inspection of standardized ring main unit (box) now produced by Henan Senyuan Electric Co., Ltd. according to the requirements of 12kVRing Main Unit (Box) Standardized Design Custom Solutions, and formed an on-site inspection report.

        At present, EETI has completed the on-site inspection of the 12kV ring main unit (box) standardized prototypes of Beijing Hezong Science & Technology Co., Ltd., Jiangsu Daye Intelligent Electric Co. Ltd., and Wenzhou Changtai Electrical Co., Ltd.