Transactions of the American Institute of Electrical Engineers, Volume 34

alternating current amount amperes apparatus applied armature average brush cable capacity catenary cent charges coil conductor connected considerable considered construction contactor copper corona cost curve customers cycles density determined dielectric direct current electric energy Engineers equation feeder field flux frequency given hanger heat impulse ratio increase indicated installed insulation load factor machines magnetic maximum demand measured meter method miles moisture mutual inductance necessary neutral normal obtained ohms operation overhead pantagraph paper phase power factor practically reactance relay resistance short circuit shown in Fig shunt sine wave skin effect slots spacing spark-over voltage sphere steam steel strain insulators strip substations supply switch Table telephone temperature terminals tests third harmonic third rail three-phase tion track transformer trolley wire tubes two-phase volts wattmeter winding zero