1,Totally-closed,Isolated and Compact SF6 Unit. 2,10KV. 3,ISO-9001-94,ISO-2000 4,Anti-seismic 5,IEC,GB Stadard BDCN-1 Ring Main UnitTechnical Data1,Rated Voltage:12KV2,Rated Withstand Voltage:75/85KV3,Frequency:50/60Hz4,Rated Current:630,1250A5,Life:2000/5000times