Jump to content

SBB-CFF-FFS Eem 923

From Wikipedia, the free encyclopedia
SBB-CFF-FFS Eem 923
Eem 923 015-2 series Butler at Payerne (Switzerland)
Type and origin
Power typeElectro-diesel
BuilderStadler Rail
Build date2011-2012
Total produced30
Specifications
Configuration:
 • Whyte0-4-0
 • UICBo
Gauge1,435 mm (4 ft 8+12 in)
Wheel diameter1.1 m (3 ft 7 in)
Wheelbase4.3 m (14 ft)
Length9.1 m (30 ft)
Width3.1 m (10 ft)
Height4.306 m (14 ft)
Loco weight45,000 kg (99,208 lb)
Electric system/s15 kV  16.7 Hz AC
25 kV 50 Hz AC
Catenary
Current pickup(s)Pantograph
Transmissionelectro-diesel
MU workingwithin class, up to 4
Loco brakeAir brake, Regenerative Brake
Train brakesAir brakes
Safety systemsAutomatic Train Control
Performance figures
Maximum speed120 km/h (75 mph)
Power output1,500 kW (2,012 hp) electric, 290 kW (389 hp) diesel
Tractive effort:
 • Starting150 kN (34,000 lbf)
Career
OperatorsSwiss Federal Railways
Number in class30
Official nameButler
Delivered2011 - 2013
DispositionAll in service
primary source [1]

The SBB-CFF-FFS Eem 923 is a dual power version of the SBB-CFF-FFS Ee 922 electric shunting locomotive which was introduced into service with the Swiss Federal Railways (SBB) in 2012.

History

[edit]

SBB had various shunting locomotives in use of which many had reached the end of their operational service life around 2010. As a result maintenance became expensive and combined with this was that, from an ecological perspective, these locomotives were no longer viable. Due to this SBB Cargo decided to order new dual power electro-diesel locomotives which could be used on the entire SBB network as the dual power design allowed them to operate efficiently on both the electrified rails and the short unelectrified sidings.

Because of the adoption of the Eem 923 SBB expects it can achieve a reduction in CO2 emissions of more than 4000 tonnes per annum compared with the current locomotives.[2]

SBB procured 30 machines in 2010 from Stadler Winterthur AG with an overall value of CHF 88 million. The first machine was delivered in March 2012 and deliveries continued until the end of 2013.[2][3]

Eem 923 008-7 shunting at Arth Goldau in 2014
Eem 923 008-7 shunting at Arth Goldau in 2014

Specifications

[edit]

The locomotives utilize a Bo wheel arrangement and are capable of traveling at speeds up to 120 km/h while operating on 15 kV AC or 25 kV AC electrified lines. While operating on electrified lines the locomotives are capable of producing a power output of 1,500 kW (2,012 hp).[4]

When operating on non-electrified sidings, the locomotives are powered by a diesel engine-generator set which produced 290 kW (389 hp) at the wheel.[4][5]

The design of the Eem 923 is derived from the Ee 922, an electrically powered two-axle locomotive also used by the SBB and produced by Stadler.[6]

The controls of an Eem 923
The controls of an Eem 923

References

[edit]
  1. ^ "Eem 923 (Butler)". TrainsDepot.org. 2018-12-28. Retrieved 2022-12-14.
  2. ^ a b Communications, U. I. C. (2022-08-09). "Switzerland: SBB Cargo commissions first hybrid locomotive". UIC Communications. Retrieved 2022-08-09.
  3. ^ "SBB Cargo electro-diesel shunter unveiled". Railway Gazette. 2011-10-14. Retrieved 2012-05-08.
  4. ^ a b "SBB Eem 923". www.beretta-modelle.ch. Retrieved 2022-08-09.
  5. ^ "Eem 923 (Butler) | TrainsDepot.org". www.trainsdepot.org. Retrieved 2022-08-11.
  6. ^ "Elektrische Lokomotiven aus europäischer Produktion". www.elektrolokarchiv.de. Retrieved 2022-08-11.
[edit]