The manufacturers of the compensation filters installed on the Czech Pendolino has announced that these do indeed solve the problem of the train’s asynchronous traction equipment causing track circuit interference. Now this difficulty has - it is hoped - been surmounted, ČD is anticipating drafting the Class 680 tilting trains into commercial service with the start of the 2006 timetable.
In summer 2005 the 680.004 was fitted with the devices developed by AŽD Praha and ELCOM in the hope of fulfilling the strict Czech requirements regarding EMC. In the same time, the DÚ discovered that there were small, but nevertheless excessive differences between the technical diagrams of the air reservoirs and the real things.
After earlier tests in Austria (see R 5/04, p. 8; R 4/04, p. 29) 680.002 returned there between 30 August and 1 September 2005, for the measurement of current interference levels. The tests were realised at Hohenau. The Pendolino then made three return trips, towed by ÖBB’s 1063 033, across the border between Hohenau and B½eclav, to ensure that the 15/25 kV AC voltage switching devices were working satisfactorily. 680.002 then ran under its own power from Hohenau to Wien Ost-bahnhhof and back. Unfortunately this Austrian visit will not the last one for trials, since the electromagnetic current interference tests under 15 kV 16.7 Hz did not produce satisfactory results.
Photo: Kurt Feuerfeil