French State Railway BB 7200
France 1976 237 produced
The class BB 7200 locomotives are representatives of the generation with the distinctive nose shape with “Nez cassé”. They were the last pure DC locomotives in France and at the same time the first DC locomotives with automatic load control. They have bogies with only one traction motor each and were built with gear ratios for different speeds. In addition to the 160 km/h multi-purpose variant and the 100 km/h freight variant, three locomotives were built for 200 km/h. In 2015, the first were retired after being replaced by the Alstom Prima.
Technical data
General
| Property | multi purpose variant | freight | trial 200 km/h |
|---|---|---|---|
| Built | 1976-1985 | 1981-1982, 1984-1985 | 1985 |
| Manufacturers | mechanical part: Alstom, electrical part: MTE | ||
| Wheel arrangement | B-B | ||
| Gauge | 1,435 mm (Standard gauge) | ||
Dimensions and weights
| Property | multi purpose variant | freight | trial 200 km/h |
|---|---|---|---|
| Length | 17.48 m | ||
| Service mass | 84 t | ||
| Adhesion mass | 84 t | ||
| Axle load | 21 t | ||
Power
| Property | multi purpose variant | freight | trial 200 km/h |
|---|---|---|---|
| Power source | electric - DC | ||
| Continuous power | 4,040 kW (5,493 PS) | ||
| Top speed | 160 km/h | 100 km/h | 200 km/h |
| Starting effort | 295.0 kN | ||
Calculated values
| Property | multi purpose variant | freight | trial 200 km/h |
|---|---|---|---|
| Factor of adhesion | 1 : 2.79 | ||
| Power-to-weight ratio | 48.1 kW/t | ||
| Adhesive weight/Total | 1 : 1.00 | ||
