Resumen
In this paper the 3 kV power supply system of Polish high-speed lines is described. Basic OCL parameters and test results of current collection quality is presented. One of the basic parameters limiting the maximum service speed on a given line is the pantograph-OCL cooperation quality. In this paper three types of overhead contact lines designed and implemented in Poland are described. There are also specified basic parameters and materials of catenaries, as well as OCL geometry or mechanical and electrical design values. The measured values obtained as a result of the performed tests are given in this paper which allows them to be compared with the design intents. One of the overhead contact line system examples is an OCL system implemented on CMK mainline. The line was built in the 1970s and nowadays is a backbone of Warsaw to Silesia rail connection. Today PKP provides 200 km/h commercial intercity services on this line. The CMK trunk line is commonly considered as a leading one on the Polish rail network. On this line several tests were performed which allowed the following two types of traction stock to enter service on the domestic network. The first of them was Siemens ES64U4 electric locomotive and the second one was ED250 Pendolino electric multiple unit, manufactured by Alstom Ferroviaria. All these tests were carried out according to the requirements described in Technical Specifications for Interoperability (TSI) of Trans-European high-speed rail network for both Test pantograph and catenary on compliance with the TSI Energy and locomotives subsystems. During the Pendolino test runs two consecutive speed records were attained, first one (250.1 km/h) by a modified FS ETR460 train in 1994 and the latter (293 km/h) by a PKP ED250 train in 2013. It is to be noticed that the speed records mentioned above were determined not only by the power supply system parameters but were dependent on other factors as well. During the test runs the current collection quality was checked, for both single-unit and multiple-unit operation. In this paper the results of pantograph-OCL cooperation are described, according to TSI ?Rolling stock? and ?Energy? subsystems. These specifications state that the general current collection quality assessment criteria are the contact wire uplift and the contact force (calculated between a collector head and the contact wire).