Mercury arc rectifier versus rotary converter automatic railway substations

EXPERIENCE in the operation of unattended, automatic, mercury arc rectifiers and rotary converter substations supplying 600-volt d-c. energy to overhead trolleys in interurban territory is discussed in this paper. Operating records covering a three-year period from November 1, 1928, through October 31, 1931 are presented for three mercury arc rectifiers, and two rotary converters of comparable size and operating under similar conditions.