GWB-35 GLB-20 CLB-10 outdoor ac high-voltage disconnecting switch conforms GB1985-89, IEC129 ... and IEC694(1980). GWB-35 GLB-20 CLB-10 outdoor ac high-voltage disconnecting switch conforms GB1985-89, IEC129( ... and IEC694(1980). GWB-35 GLB-20 CLB-10 outdoor ac high-voltage disconnecting switch conforms GB1985-89, IEC129( ... ,20kv,35kv200A,400A,600A,1000A,1500A,2000A,3000A outdoor hv disconnecting switch