The Design of Static Transformers

20-kw transformer 50 cents 50 cycles active material air-blast transformers Alternating Currents ampere Angle of Lag cast-iron cent cloth component cooling Copper loss core loss core plate core type curves in Fig Curves showing Eddy Current efficiency Elec Electrical Engineers employed Engrs external form factor former full load heat hysteresis Illustrated increased inductance Inst insulating materials insulation Journ kilogram kw hr leakage load factor magnetic circuit magnetic reluctance magnetising magnetomotive force manufacturers mean length no-load current number of turns obtained oil-cooled transformers oil-immersed transformer power factor practice primary and secondary primary pressure primary winding radiating surface rated load Rated Output reactance drop regulation ribs secondary coils secondary current secondary windings sheet iron shown in Fig single-phase transformer sq cm sq dm static transformer Telegraphy temperature rise tests thickness three-wire Trans transformer cores transformer design values volts per turn watt per sq Westinghouse winding space winding window