The line was originally 1,067 mm (3 ft 6 in) gauge and electrified at 600V DC, but it was regauged to 1,435 mm (4 ft 8+1⁄2 in) in June 1945, and the overhead line voltage was raised to 1500V DC from December 1976.
The initial gauge of the track was 1,067 mm (3 ft 6 in), and it was electrified at 600V DC. It was later re-gauged to 1,435 mm (4 ft 8+1⁄2 in) in June 1945, and the overhead line voltage was raised to 1500V DC starting in December 1976.