... GLB-20 CLB-10 outdoor ac high-voltage disconnecting switch conforms GB1985-89, IEC129(1984) and IEC694(1980). ... GLB-20 CLB-10 outdoor ac high-voltage disconnecting switch conforms GB1985-89, IEC129(1984) and IEC694(1980). ... GLB-20 CLB-10 outdoor ac high-voltage disconnecting switch conforms GB1985-89, IEC129(1984) and IEC694(1980). ... ,400A,600A,1000A,1500A,2000A,3000A outdoor hv disconnecting switch