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WCAM (W -broad gauge ; CA -Both DC and AC ; M -for both goods and passenger service) is the dual-power AC/DC series locomotive used by Indian Railways. These locomotives can run under both DC traction and AC traction. All the WCAM locos except the WCAM 1 (made by CLW) were made by BHEL. They have 750 V DC traction motors, using resistance banks in DC mode and a variable ratio auto-transformer with rectifier units in AC mode, for power control. The WCAM class locomotives were in service only in the Mumbai region. The dual-voltage WCAM series locomotives hauled intercity trains out of Mumbai DC suburban region which was on a 1500 V DC overhead system, as opposed to other parts of India which have 25000 V AC overhead. Western Railways having switched over to complete AC traction on 5 February 2012 has transferred almost all its WCAM locomotives to Central Railways although it still has some WCAM 1 locomotives which haul passenger trains up to Ahmedabad Junction. On the Central Railway line they are in service on Mumbai CST - Igatpuri or Mumbai CST - Pune line. Sometimes they travel up to Itarsi Junction. With Central Railways progressively moving towards a complete changeover from DC to AC traction, trains leaving Lokmanya Tilak Terminus have started using pure AC engines. == Loco sheds holding WCAM engines == As of 2014, the only shed holding WCAM engines is Kalyan. Prior Western Railways changeover to AC traction, its locomotives were managed by the Valsad shed. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Indian Railways WCAM class」の詳細全文を読む スポンサード リンク
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