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Downer EDI Rail GT46C ACe : ウィキペディア英語版
Downer EDI Rail GT46C ACe

The GT46C ACe is a model of diesel electric locomotive designed and built by Downer Rail, Cardiff using Electro-Motive Diesel components between 2007 and 2013.
The first units were built as the SCT class for freight operator SCT Logistics from 2007 followed by the LDP class for Downer Rail's Locomotive Demand Power division, the TT class for Pacific National, the GWA class for Genesee & Wyoming Australia, the WH class for Whitehaven Coal, and the SSR class for Southern Shorthaul Railroad.
==Design==
The class was a new design for Australian conditions based on other locomotives produced by Downer EDI Rail, such as the narrow gauge GT42CU AC purchased by Queensland Rail and Pacific National and the GT46C purchased by Westrail, Freight Australia and FreightLink. The GT42CU AC used a 12-cylinder EMD 710 engine, based on the USA built SD70MAC with scaled down traction motors, while the GT46C used a 16-cylinder EMD 710 engine with DC traction systems. The American SD70ACe was EMD's 2nd generation AC loco with IGBT inverters, but was too large and heavy for the Australian interstate standard gauge network, weighting in at 188 tonnes when the limit was 134 tonnes. In addition, the GT46C design was already at the 134 tonne limit, even before adding inverters, heavier traction motors and more cooling capacity for higher power engine, and there was a requirement that fuel capacity could not be sacrificed.〔 〕
The locomotive has AC traction equipment, with a Mitsubishi Electric package also used on the SD70ACe, including a TA17 traction alternator, CA9E companion alternator and six ITB 2630 traction motors, along with solid state IGBT inverters.〔(【引用サイトリンク】title=Downer EDI factsheet: GT46C ACe )〕 The prime mover is a turbocharged 16-cylinder EMD 710. New technology used included passive steer bogies, to reduce flange wear on corners. The class were built at Cardiff, with the frames constructed at Port Augusta, and the bogie frames at Kelso.〔

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