Kálmán Kandó de Egerfarmos et Sztregova was a Hungarian engineer, the inventor of phase converter and a pioneer in the development of AC electric railway traction.
Kandó Kálmán
Electric locomotive RA 361 (later FS Class E.360) by Ganz for the Valtellina line, 1904
Kandó V40 electric locomotive of MÁV
The first locomotive with a phase converter was Kando's V50 locomotive (only for demonstration and testing purposes)