Composite insulator Series 2: ANSI class DS series: 15kV, 25kV, 28kV, 35kV These insulators belongs to the Series 2:15KV,25KV,28KV ... UNIT CATALOGUE NUMBER HDDS-1 HDDS-2 HDDS-3HDDS-4Voltage Class KV15 252835ANSI Class - DS-15 DS25DS28DS35Specified Mechanical Load(SML) ... Socket, ball, clevis, tongue, Y clevis, eye)Series 2: ANSI class DS series: 15kV, 25kV, 28kV, 35kVSeries 3: Pin type insulator ...