english: On 27 April 1924 the inner suburban lines were electrified with 750 V third rail; the same lines were re-electrified at 25 kV overhead wires in the 1960s.
non_english: Tanggal 27 April 1924, jalur pinggiran kutha lebet dipunsukani listrik 750 V. Jalur ingkang sami ugi dipunparingi listrik ulang kanthi 25 kV ing taun 1960-an.