Tests on neutral sections and high speed section insulator using the Mk I APT pantograph (Wigan-Lancaster, unenergised line, May 1976) (TM-ETR-78)

Dead line testing of the APT Pantograph to 160 km/h over the High Speed Section Insulator and the modified and original versions of the Neutral Section highlights that the insulator protecting skids could be a potential damaging hazard to pantograph carbons when speeds are increased. At speeds up to...