FAV E 440

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FAV E 440
E440-3pietrarsa1999-04-08.jpg
Numbering: FAV E.440.1-4
Number: 4th
Manufacturer: CEMSA
Year of construction (s): 1932
Retirement: 1967
Axis formula : D.
Gauge : 1435 mm ( standard gauge )
Length over buffers: 9,375 mm
Service mass: 56 t
Friction mass: 56 t
Top speed: 50 km / h
Hourly output : 1,000 kW
Power system : 3.6 kV / 16.7 Hz three-phase current
Power transmission: direct power transmission from three-phase catenary to three-phase drive motors
Number of traction motors: 2
Drive: Angular rod drive type Kandó with 2 electric motors located deep in the frame
Brake: Handbrake
air brake

The E.440 series was an electric locomotive series of the private Italian railway Ferrovia Alta Valtellina . It was created from parts of the planned electric locomotive FS E.471 and was in operation until 1967, when electrification with three-phase current on the named railway was ended.

history

The planned attempt to electrify the Rome - Sulmona railway line with three-phase current 10 kV / 45 Hz resulted in an order for ten locomotives with a rotating converter for the company CEMSA in Saronno . The development work was carried out by the company's second engineer, Erminio Mascherpa, in collaboration with Kálmán Kandó . The locomotive was to achieve an output of 3,270 kW at 100 km / h on the 45 Hz route. A locomotive was completed and tested on the Lecco - Sondrio line, electrified with three-phase current 3.6 kV / 16.7 Hz . At the same time four copies were processed. During testing, the converter turned out to be unsuitable for railways and the locomotive had to be parked in 1929.

When the private Italian railway Ferrovia Alta Valtellina wanted to electrify its route from Sondrio to Tirano with three-phase current 3.6 kV / 16.7 Hz, it needed four electric locomotives . That was the offer of the company CEMSA to produce four locomotives in a modified form from the parts of the four planned FS E.471 locomotives. The cabs, pantographs , the chassis, the compressors and many small parts of the planned electric locomotive were reused. The E.440.1-4 locomotives were built for the private railway and went into operation in 1932/33.

1953 operating on the route was Monza - Lecco - Sondrio on DC converted 3 kV. This meant supplying the Sondrio – Tirano line with a separate temporary line, which made operations unreliable. The locomotives continued to operate on the line until 1967, when rail operation with three-phase current 3.6 kV / 16.7 Hz ended here. The four machines in the series were parked in Tirano until 1974. The E.440.3 was restored to its original state and is now in the Pietrarsa Railway Museum .

technical description

The locomotive FAV E 440 is the only electric locomotive with three-phase -drive with the wheel arrangement D. The external appearance is somewhat reminiscent of the locomotive FS E.552 . Like this locomotive, it has only one driver's cab and one engine room, which contained the traction motors, the fluid starter and the auxiliary systems.

From a mechanical point of view, the second axis is driven by the Kando rod type. The locomotives were still equipped with this drive at the end of operation.

In terms of the electrical part, the locomotive was designed a little differently than the FS E.552 . It only had two speed levels with speeds of 33 and 50 km / h. Within these speed steps, the three-phase current taken from the catenary was transferred to the drive motors with the optimal power factor. The liquid starter , which served as a so-called accelerator between the continuous speed levels, was used between the two speed levels . This unit worked as a fluid resistance, which enabled a steady acceleration when starting and when changing to a higher speed level. A 0.5 percent soda solution served as the resistance element, which reached an ever higher level when the locomotive started up and when accelerating, thereby ensuring a connection of steadily decreasing resistance between the electrode plates. The engine driver could set the acceleration on a separate lever next to the speed level. Since this soda solution warmed up when accelerating, the locomotive had to refill water for the resistors when upgrading in the depot and from time to time. As a result, they could only work effectively in the speed levels.

literature

See also

Web links

Commons : FAV E.440  - collection of images, videos and audio files

Individual evidence

  1. ↑ Website about the development of the E.440 at www.drehscheibe.online
  2. ↑ Website about the development of the E.440 at www.drehscheibe.online
  3. ↑ Joachim von Rohr: Ligurian three-phase summer 1963. EK-Verlag, Freiburg 2014, ISBN 978-3-88255-469-4 , p. 95.
  4. ↑ Website about the development of the E.440 at www.drehscheibe.online