... ,HDPIN-33 These insulators belongs to the Series 3: Pin type insulator:15kV,24kV,33KVMain Technical ParametersSpecificationHDPIN-15HDPIN-24HDPIN-33Rated Voltage ... class DS series:15kV,25kV,28kV,35kV Series 3: Pin type insulator:15kV,24kV,33kV Series 4: Station Post Insulator:15kV ...