FS Class E.470
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| Type and origin | |
|---|---|
| Power type | electric |
| Builder | TIBB |
| Build date | 1925-1926 |
| Total produced | 4 |
| Specifications | |
|---|---|
| Configuration: |
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| • AAR | 1-D-1 |
| • UIC | 1′D1′ |
| Gauge | 1,435 mm (4 ft 8 1⁄2 in) standard gauge |
| Driver dia. | 1,630 mm |
| Adhesive weight | 64 tonnes |
| Loco weight | 91 tonnes |
| Electric system/s |
Three-phase overhead line 10 kV, 45 Hz |
| Current pickup(s) | Two dual-collector pantographs |
| Performance figures | |
|---|---|
| Maximum speed | 100 km / h |
| Power output | 2,090 kilowatts (2,800 hp) |
| Career | |
|---|---|
| Operators | FS |
| Disposition | All scrapped |
The FS Class E.470 was an electric locomotive class of the state-owned Italian railway Ferrovie dello Stato. It was used on the Italian three-phase test line from Rome-Sulmona especially in express train service. After the end of the trial operation in 1945, the locomotives were scrapped, and no locomotive of the class has been preserved.
The operating experience with the northern Italian three-phase network running at 3.6 kV, 16.7 Hz threw up several problems. With increasing power demands, the voltage was too low and the direct drive to the axles risked overloading the traction motors.
Therefore, it was decided to try a trial route, which would be electrified with a 10 kV, 45 Hz three-phase power system. This had the advantage that power plants could be used with industrial frequency. It would be a test track with steep gradients and small radius curves. The Rome - Sulmona route was selected for the test.
The Class E.470 differed from earlier three-phase locomotives in two respects. The traction motors were supplied through a transformer and they drove through reduction gears to two dummy shafts, which were coupled to the driving wheels with the usual side rod drive.
For the experiment, the following locomotives were provided:
In addition, there was a locomotive, FS Class E.471, with a rotary converter.
The Class E.470 locomotives were built by Tecnomasio Italiano Brown Boveri (TIBB) at Vado Ligure and bore a strong resemblance to FS Class E.431, including the use of pole pantographs. However, they could be distinguished from the E.431 by the presence of the oil cooler for the transformer and the dummy shafts on the drive triangle. After construction, the locomotives were tested on a section of the Modane - Turin railway line.
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Wikipedia