The 'sparks' effect

摘要

The Southern Railway inherited from its predecessors two different electrified networks. The LSWR used a 660V dc third-rail system while the LBSCR had adopted a 6,700V ac overhead catenary scheme. Both networks were for the use of suburban trains; the Brighton system originated in 1909 and applied to some south London local services from Victoria and London Bridge, while the LSWR system dated from 1915 and applied to services from Waterloo to Wimbledon and other south-western suburbs.