A new NRE 3GS21B locomotive in the Union Pacific scheme.
Type and origin
Power type
Diesel-electric
Builder
National Railway Equipment (NRE)
Model
3GS21B
Build date
December 2006 (2006-12) – Present
Total produced
182
Specifications
Gauge
4 ft 8+1⁄2 in (1,435 mm)
Prime mover
Cummins QSK19C (×3)
Engine type
Diesel engine (×3)
Aspiration
Turbocharger (×3)
Cylinders
6 (×3)
Performance figures
Power output
2,100 hp (1,570 kW)
Career
Operators
See list
The NRE 3GS21B is a low-emissions diesel genset locomotive built by National Railway Equipment (NRE). Instead of a single prime mover, the NRE genset locomotive is powered by three separate 700 horsepower (522 kW) Cummins QSK19C engines providing a total power output of 2,100 horsepower (1,570 kW). Each engine could be individually started or shut off depending on load reducing overall diesel emissions and improving fuel efficiency.[1] More than 150 of the 3GS21B genset locomotives have been produced to date, with the majority of these units being manufactured at NRE's Mount Vernon shops in Southern Illinois.[2] In addition, three road slug models have also been produced.
^"N-Viromotive new locomotive". www.nationalrailway.com. Archived from the original on 2007-09-01.
^Train Web: Gensets Gen-set switchers by National Railway Equipment.
The NRE3GS21B is a low-emissions diesel genset locomotive built by National Railway Equipment (NRE). Instead of a single prime mover, the NRE genset locomotive...
of the NRE 3GS21C locomotive. The QSK19C engine is widely used for non-railway applications, and spare parts are readily available. NRE3GS21B "N-Viromotive...
6790 Rebuilt to burn natural gas & has an EMD 12-645E prime mover. 1864 KLW NZE15B 2023 N/A Rebuilt from NRE3GS21B. Slated to replace current fleet....
Engineers do not like them because they are slow to get a cut of cars moving. NRE3GS21B Glossary of North American railway terms: Genset Railpower GGS2000D -...
railroad companies worldwide, with an emphasis on the North American market. NRE's flagship locomotive product is dubbed the N-ViroMotive and is targeted at...
Authority in 2011. Being overhauled by MPI. 2013–2014 MPI HSP46 2000–2039 40 2009 NRENRE3GS21B 3248–3249 0 Work locomotives – not used for passenger service...
San Diego Trolley, the San Diego and Imperial Valley Railroad uses two NRE3GS21B diesel-powered genset locomotives instead of electric locomotives, as...
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