... such special requirements as "Five Prevention", full enclose, full disconnection, full insulation, full behavior, etc.StandardsGB3906 A.C. Metal-Enclosed Switchgear for Rated Voltages Of 3 ... kVGB/T 11022 General Technical Specifications for High-Voltage Switch EquipmentIEC60298 A.C. Metal-Enclosed Switchgear and Controlgear for Rated Voltages Above 1 ...