FS E.552

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FS E.552
Numbering: E.552.001-015
Number: 15th
Manufacturer: Nicola Romeo
Year of construction (s): 1922-1923
Retirement: 1964
Axis formula : E.
Gauge : 1435 mm ( standard gauge )
Length over buffers: 9,700 mm
Service mass: 72 t
Friction mass: 72 t
Top speed: 50 km / h
Hourly output : 1,600 kW
Driving wheel diameter: 1,070 mm
Power system : 3.6 kV / 16.7 Hz three-phase current
Power transmission: direct power transmission from three-phase catenary to three-phase traction 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.552 series was an electric locomotive series of the Ferrovie dello Stato . It was used on the northern Italian three-phase network, especially in shunting services. It was in use from 1922 to 1964.

history

The locomotive was developed as a further development of the FS E.551 at Nicola Romeo according to plans by Kálmán Kandó . In contrast to this locomotive, the E.552 was designed as a locomotive with a one-sided outer driver's cab and an adjacent engine room.

The locomotives of the series E.552 were unsuccessful in use. The pulling power was poor and they were difficult to operate. The four continuous speed levels that were required for passenger locomotives proved to be an obstacle in operation with the locomotive. 16.7 km / h was their lowest speed.

For these reasons, the locomotives were handed over to the shunting service after testing . They were in use during their entire operation at the train stations in Genoa , in the port and at the Genua Brignole and Genua PP stations . Occasionally a locomotive was lent to Savona . The locomotives were in service until 1963/1964 and were all scrapped.

technical description

The locomotives were designed with a one-sided driver's cab and a porch in which the drive motors and auxiliary equipment were located. This configuration was advantageous due to the separation of the engine room from the engine room. This reduced the risk of accidents when driving "engine room ahead" and the risk to the train driver in the event of an accident.

At first, the locomotives appeared in a uniform black color, including the frame, the wheels, the pantographs and the trusses. The driver's cab was later painted red. In the post-war period, the locomotives were designed in the same color as the three - phase electric locomotives, in chestnut brown.

Mechanical part

The motors mounted in the frame were arranged a little higher than in the FS E.550 or FS E.551. For this purpose, the so-called Kando drive was used for the first time , which was used on the E.552.001 and E.552.002 locomotives . However, this drive was not used uniformly for the series, some locomotives still received a drive in a modified form with a triangle. Others received a Bianchi joint drive .

Electrical part and auxiliary equipment

The electrical equipment consisted of the two traction motors, the switching mechanism, the liquid starter and the auxiliary systems. The locomotive was equipped with four speed levels of 16.7 km / h, 25 km / h, 33.3 km / h and 50 km / h. The rotors of the two three-phase motors had seven slip rings, four on one shaft end and three on the other shaft end. The four speed levels were achieved in combination between the different number of poles and parallel connection or series connection . Within these speed levels, the three-phase current taken from the catenary was transferred to the traction motors with the optimal power factor. Between the four speed levels, the liquid starter served as a so-called accelerator between the continuous speed levels . The operation of the liquid filler and the control of the locomotive were the same as for the E 330.

literature

  • Joachim von Rohr: Ligurian three-phase summer 1963. EK-Verlag, Freiburg 2014, ISBN 978-3-88255-469-4 .
  • Wolfgang Messerschmidt: History of the Italian electric and diesel locomotives Orell Füssli Verlag, Zurich 1969,

See also

Web links

Individual evidence

  1. ↑ Joachim von Rohr: Ligurischer Drehromsommer 1963. EK-Verlag, Freiburg 2014, ISBN 978-3-88255-469-4 , p. 27.
  2. ↑ Wolfgang Messerschmidt: Locomotive technology in the picture - steam, diesel and electric locomotives . Motorbuchverlag Stuttgart, 1991 ISBN 3-613-01384-3 ; P. 71
  3. ↑ Joachim von Rohr: Ligurischer Drehromsommer 1963. EK-Verlag, Freiburg 2014, ISBN 978-3-88255-469-4 , p. 49.
  4. ↑ Wolfgang Messerschmidt: Locomotive technology in the picture - steam, diesel and electric locomotives . Motorbuchverlag Stuttgart, 1991 ISBN 3-613-01384-3 ; P. 71
  5. ↑ Wolfgang Messerschmidt: History of the Italian Electric and Diesel Locomotives Orell Füssli Verlag, Zurich 1969, p. 38.