SNCF Class BB 8700

Last updated
Class BB 8700
Type and origin
Power type Electric
Builder Alsthom
Model BB 8500/BB 88500
Build date1964–1972
Rebuild date2001 [1]
Number rebuilt20
Specifications
Configuration:
   UIC B'B'+B'B'
Gauge 1,435 mm (4 ft 8 12 in) standard gauge
Wheel diameter1,100 mm (3 ft 7.31 in)
Length
  • 14.700 m (48 ft 2 34 in) (8710-36)
  • 14.940 m (49 ft 14 in) (8737-86)
Width3.038 m (9 ft 11.6 in)
Height4.148 m (13 ft 7.3 in)
Loco weight
  • 78.3 t (77.1 long tons; 86.3 short tons) (8710-36)
  • 79.5 t (78.2 long tons; 87.6 short tons) (8737-86)
Electric system/s 1.5 kV DC Catenary
Current pickup(s) Pantograph
Traction motors 2 × TAB 660 B1
Performance figures
Maximum speed100 km/h (62 mph) [1]
Power output
  • 2,610 kW (3,550 CV; 3,500 hp) (8710-36)
  • 2,940 kW (4,000 CV; 3,940 hp) (8737-86) [1]
Tractive effort 646 kN (145,000 lbf) [2]
Career
Operators SNCF/Fret
Class BB 8700
Number in class20
Numbers8710–8786
Locale Culoz–Modane railway
Withdrawn2004–2005 [1]
Disposition Bank engine

The Class BB 8700 electric locomotives were rebuilt from the BB 8500 (or BB 88500) as the first subseries for the growth in Maurienne.

Contents

Indeed, while the CC 6500 participated in this task, the reorganization of traction in Maurienne had led them to other services. Since the BB 8500 had been restricted for some years to 150 km/h (93 mph), as a result of their poor suspension and for the comfort of the drivers, it was decided to re-use twenty for Maurienne. These were renumbered as Class BB 8700.

Conversion

The conversion consisted particularly in the modification and expansion of the driving cabs at one end, by removing an air compressor. The BB 8700 were permanently coupled to run in pairs, with the unmodified cabs remaining in the middle, at the permanent coupling. Limited to 80 km/h (50 mph) and on a limited route, their discomfort was more bearable for the driving personnel.

Service

These locomotives, assigned to freight activity and attached to the Chambéry depot, were used exclusively on the Maurienne line for banking freight trains. They ran exclusively as paired units.

By 2005, the end of their career related to the reorganization of Fret SNCF and pushed them quickly towards withdrawal. Banking locomotives became less necessary with the introduction of the more powerful Class BB 36000. If the occasion arose, a Class BB 7200 was used. [1]

See also

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References

  1. 1 2 3 4 5 "BB 8700 SNCF" [BB 8700 SNCF]. Trains d'Europe (in French). Retrieved 6 April 2017.
  2. "SNCF withdrawn dc electric locomotives". Railfaneurope.net. Retrieved 6 April 2017.

Further reading