PKP class ET22: Difference between revisions
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ET22 is a name for a Polish six-axle freight transport electric locomotive built in Pafawag in the period of 1969 - 1989.[1] Despite its main purpose the locomotive is widely used for passenger service.
History
Soon after Pafawag had started production of EU07 The Rolling-stock Industry Central Bureau of Construction (Pl.: Centrale Biuro Konstrukcyjne Przmysłu Taboru Kolejowego) started designing of a new heavy Co-Co locomotive. Electrical parts of the locomotive were based on electric devices (together with engines) used in EU07 locomotive. [2] First two prototypes of the 201E locomotive (building number) were ready in 1969. Large scale production started in 1971[3] Until the production had been ceased in 1989 PKP bought 1183 items of ET22 locomotive.[4] This made ET22 class the largest series of the same locomotive in Europe, excluding Russia.[5] ET22 locomotives vary depending on the date of production, some changes were made during servicing and repairing as well. Changes made to box caused a situation, when none of the locomotives resemble the prototype. There are two basic types of the box with main differences made to size and placement of side windows, resistors, air intakes, and ventilation curtains. Older type box can be observed in locomotives with serial numbers up to 240. Later engines have newer type box. In 1973 Pafawag built a prototype unit of ET22 locomotive (production number 201Ea-53) with changed transmission parameters and top speed of 160 km/h. This locomotive was classified as EP23-001. After a series of tests the decision was made not to continue construction. Possible causes are problems with maneuvering and friction. The prototype was rebuilt as ET22-121 inplace of former 121 locomotive decased in 1977.[6] Today this item is located in Jaworzyna Śląska railway museum as an exhibit.
Another two prototype items were produced in 1977 (production numbers 201Ec-1 and 201Ec-2). Main changes introduced included modernised box support, multiple steering and several different modernisations, like automatic doors steering. Those locomotives were at first given 301 and 302 numbers. As the production of ET22 continued they bore numbers 501 and 502, next 701 and 702, to finish today with numbers 1001 and 1002. In the 1980's PKP needed locomotives for servicing passenger connections and due to declining demand on freight transport pneumatic system enabling automatic closing of carriage doors. ET22-2000 was modernised in 2004 in Gliwice. Main changes included main electric and mechanical parts as well as crew cabin with modern computer and joysticks. The locomotive is painted with PKP Cargo designation.[7]
Technical data
ET22 is classified as a highly effective freight locomotive. Its power reaches 3000Kw (4080 hp) and it is the biggest single-box Co-Co locomotive in PKP service. Technical features enable this engine to pull heavy freight trains of up to 3150 t. with speed of 70 km/h.[8] Trains of up to 2700 t. are able to be pulled with the speed of 80 km/h. When used as passenger locomotive it can pull trains weighing up to 700 t. with speed of 125 km/h.[9] This being caused by several features and solutions based on passenger EU07 and EU06 locomotives. Four EE-451A engines are isolated in H class with maximum temperutere allowed of 180 Celsius degrees. They have four main and four commutative poles.[10] Because of its length and distance between axles ET22 locomotive performs poorly on tight curves, unlike older ET21 locomotives despite the fact producers gave the same parameters for minimum curve diameter. Driving ET22 at winding tracks causes severe damage both to rails and locomotive drivers. This forced several modifications, which are made presently. Such changes are essential, as fewer and fewer ET21 locomotives stay in service and ET41 are ineffective on highland tracks due to serious loss of power. Most, but not all, locomotives are painted with a narrow yellow stripe on the front and massive letters and figures used for classification and serial numbers[11]
Nicknames
See also
Resource
- ^ "Technical data of ET22 locomotive". Retrieved 2007-07-26.
- ^ Wojciech Cupiał. "Tabor, czyli co jeździ po polskich torach". Retrieved 2007-07-26.
- ^ "Gallery of ET22 locomotive". Retrieved 2007-07-26.
- ^ Wojciech Cupiał. "Tabor, czyli co jeździ po polskich torach". Retrieved 2007-07-26.
- ^ "Maszyna EU07 Symulator". Retrieved 2007-07-26.
- ^ Wojciech Cupiał. "Tabor, czyli co jeździ po polskich torach". Retrieved 2007-07-26.
- ^ Wojciech Cupiał. "Tabor, czyli co jeździ po polskich torach". Retrieved 2007-07-26.
- ^ "Technical data of ET22 locomotive". Retrieved 2007-07-26.
- ^ "Gallery of ET22 locomotive". Retrieved 2007-07-26.
- ^ "Technical data of ET22 locomotive". Retrieved 2007-07-26.
- ^ Wojciech Cupiał. "Tabor, czyli co jeździ po polskich torach". Retrieved 2007-07-26.
