Single/Three phase A. C output synchronous generator. ST series Alternator (output from 3KW to 300KW) The ST series generators are mainly designed to serve as power generating unit of small capacity which supply electricity for lighting purpose in ships as well as for household electric devices used in towns or villages. The construction of the generators is of drip - proof, salient pole rotating field self-excitation is of class E or B. Rotor insulation is of class B. f