PKP class ET40
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ET40-35 locomotive in Laskowice Pomorskie, Poland
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| Type and origin | |
|---|---|
| Power type | Electric |
| Builder | Škoda Works |
| Model | 77E1 (first 30 locomotives) 77E2 (last 30 locomotives) |
| Build date | 1975–1978 |
| Total produced | 60 |
| Specifications | |
|---|---|
| Configuration: |
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| • UIC | Bo'Bo'+Bo'Bo' |
| Gauge | 1,435 mm (4 ft 8 1⁄2 in) standard gauge |
| Wheel diameter | 1,250 mm (49.21 in) |
| Length | 34,420 mm (112 ft 11 1⁄8 in) |
| Width | 2,950 mm (9 ft 8 1⁄8 in) |
| Height | 3,987 mm (13 ft 1 in) |
| Axle load | 20.5 tonnes (20.2 long tons; 22.6 short tons) |
| Loco weight | 164 tonnes (161 long tons; 181 short tons) |
| Electric system/s | 3000 V DC overhead line |
| Current pickup(s) | Pantograph |
| Traction motors | 7AL484ZT, 4 off |
| Loco brake | Oerlikon |
| Train brakes | Air |
| Safety systems | SHP |
| Performance figures | |
|---|---|
| Maximum speed | 90 km/h (56 mph) (84:27 gear ratio) |
| Power output | 4,080 kW (5,470 hp) |
| Tractive effort | 490 kN (110,000 lbf) |
| Career | |
|---|---|
| Operators | PKP |
| Class | ET40 |
| Number in class | 60 |
| Nicknames | Bomba, Bombowiec |
| Delivered | 1975 |
ET40 is the name for Bo'Bo'+Bo'Bo' two-unit freight electric locomotive in service of Polish national rail operator, PKP. The locomotive was produced by Škoda Works in the Czechoslovakia.
During the 1960s and 1970s a massive increase in freight transport was seen in Poland, especially on the routes between Silesian coal mines and Polish Baltic ports. In the beginning of the 1970s the whole Trunk Coal Line (Pl: Magistrala Węglowa), which was the main route for exporting Polish coal, had been electrified. This situation caused an urgent need for suitable locomotives able to pull heavy freight trains. As a result negotiations with Škoda Works in Plzeň started. Poland sent an order for 60 articulated freight locomotives, based on the EU05, which was currently in service at the time.
As of 2007, ET40 locomotives work mostly for Bydgoszcz engine shed, but in 2000 several units were sent to Wrocław in order to serve on the highland Wrocław-Jelenia Góra line, where they are intended to replace ET21 locomotives.
One locomotive from the series - ET40-41 was rebuilt in 1990 into EP40 standard, for high-speed passenger trains (up to 160 km/h), but as the result was not satisfactory, PKP resigned from further modernisations and the only EP40 was rebuilt back to ET40 standard in 1993.
As a development of EU05 locomotive the ET40 technical features are in many ways similar to its predecessor, this refers mostly to the electric installation. The main differences are in the transmission and cooling system. The locomotive consists of two mechanically and electrically identical sections. Each part has a crew compartment on one end and doors on the other, which enable moving between sections. It is possible to drive sections separately after they have been disconnected. Sections are distinguished by an additional letter A and B added to the locomotive's designation.
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Wikipedia