SNCF Class BB 8700

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SNCF Class BB 8700 - Wikipedia

From Wikipedia, the free encyclopedia

Class BB 8700

Type and origin
Power type	Electric
Builder	Alsthom
Model	BB 8500/BB 88500
Build date	1964–1972
Rebuild date	2001^[1]
Number rebuilt	20

Specifications
Configuration:
• UIC	B'B'+B'B'
Gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Wheel diameter	1,100 mm (3 ft 7.31 in)
Length	14.700 m (48 ft 2+3⁄4 in) (8710-36) 14.940 m (49 ft 1⁄4 in) (8737-86)
Width	3.038 m (9 ft 11.6 in)
Height	4.148 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 speed	100 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 lb_f)^[2]

Career
Operators	SNCF/Fret
Class	BB 8700
Number in class	20
Numbers	8710–8786
Locale	Culoz–Modane railway
Withdrawn	2004–2005^[1]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.

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]

References

^ ^a ^b ^c ^d ^e "BB 8700 SNCF" [BB 8700 SNCF]. Trains d'Europe (in French). Retrieved 6 April 2017.
^ "SNCF withdrawn dc electric locomotives". Railfaneurope.net. Retrieved 6 April 2017.

BB 60000 C 61000, C61100 BB 61000 A1AA1A 62000 BB 62400 BB 63000 BB 63400 BB 63500 BB 64700, BB 64800 CC 65000 CC 65500 BB 66000 BB 66400 BB 66600 BB 66700 BB 67000 BB 67200 BB 67300 BB 67400 A1AA1A 68000 A1AA1A 68500 BB 69000 BB 69200 BB 69400 CC 70000 BB 71000 CC 72000 CC 72100 BB 75000 BB 76000 CC 77000 CC 80000
Prototype and experimental	BB 60000 040.DI. → BB 60001 030.DC → C 60002 040.DC → BB 60021 040.DM → BB 60031–33 040.DF → BB 60041 141.DA. → 1D1 60051

Shunters

Steam locomotives

Tender locomotives	232.P 232.Q 232.R 232.S 232.U 141.P 141.R 240.P 241.P 242.A 150.P 150.X 150.Y 150.Z
Tank locomotives	221.Q 030.TA 030.TU 030.TW 040.TX 050.TX 050.TQ 151.TQ

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Service

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References

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