Hydro generator 1. Vertical generator 2. Horizontal Generator SF,SFW,SFWG,SFD SF800-24/2150, SFW850-6/1180,SFW630-8/1180, SFWG3000-44/3500,SFD1000-12/2150… Generator Type e.g. SF90-28/6800 SF— Vertical hydro-generator (SFW for horizontal hydro-generator; SFWG for horizontal bulb type hydro- generator); 90— Rated generator output, in MW or KW; 28— Number of poles; 6800— Outer diameter of stator core, in millimeters.