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The is a Japanese AC electric multiple unit (EMU) train type first introduced by Japanese National Railways (JNR) in March 1985 and later operated on local services by the East Japan Railway Company (JR East) and Kyushu Railway Company (JR Kyushu). The units were formed by converting former AC/DC dual-voltage 451 series, 453 series, 457 series, and 475 series EMUs.〔 , only two 2-car 717-200 series sets remain in active service, with JR Kyushu.〔 ==Variants== * 717-0 series: 3-car 20 kV AC 50 Hz sets converted from former 451 series cars for use in the Sendai area * 717-100 series: 3-car 20 kV AC 50 Hz sets converted from former 451 and 453 series cars for use in the Sendai area * 717-200 series: 7 x 2-car 20 kV AC 60 Hz sets converted from November 1986 from former 475 series cars for use in Kyushu * 717-900 series: One 2-car 20 kV AC 60 Hz set converted from former 457 series cars for use in Kyushu 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「717 series」の詳細全文を読む スポンサード リンク
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