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Bombardier–Alstom HHP-8
The Bombardier–Alstom HHP-8 (''High Horse Power 8000'') is a type of twin-cab electric locomotive manufactured by a consortium of Bombardier Transportation and Alstom for use by Amtrak and the Maryland Area Regional Commuter system. The locomotive's electrical drive technology is directly derived from the SNCF BB 36000 manufactured by Alstom.
A small class size and reliability problems with correspondingly high per capita maintenance and replacement costs caused Amtrak to seek service replacements for its fifteen units at the same time as the older EMD AEM7s after only a decade in service.
== Design ==
The locomotives have a 6 MJ crash energy absorbance structure; the carbody is stainless steel.〔 The electrical traction system is directly derived from the system used on Alstom's BB 36000 ''Astride'' locomotives; this includes four 1.5MW three phase asynchronous traction motors powered by GTO based inverters, with one inverter per motor; the electric system also allows regenerative and rheostatic braking.〔 The locomotives were designed for up to operation but are actually limited in service to FRA Tier 1 standards, operating up to .〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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