Standard and Recent Technology Trend of Medium-voltage Switchgear and Controlgear

Abstract

Medium-voltage switchgear for rated voltages above 1kV and up to and including 84kV has been widely applied over 50 years. Relevant domestic standards for medium-voltage switchgear have been revised in accordance with IEC standard revision. This brochure reports mainly the following three study items. Firstly, relevant standards were extracted, and revision history was surveyed. Secondly, differences between domestic and international standards for medium-voltage switchgear were described. Lastly, the recent technology trends of evaluation were reviewed.