GW4-12 series outdoor ac high-voltage disconnecting switch conforms GB1985-89, IEC129(1984) and IEC694( ... 1980). GW4-12 series outdoor ac high-voltage disconnecting switch conforms GB1985-89, IEC129(1984) and IEC694(1980). ... GW4-12 series outdoor ac high-voltage disconnecting switch conforms GB1985-89, IEC129(1984) and IEC694(1980). ... ,1000A,1500A,2000A,3000A outdoor high voltage disconnect switch