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The speedy, precise and cost-efficient construction of new overhead contact systems calls for simultaneous access to the contact wire and suspension cable along with uncompromising safety. Also, the tensioning points and compensators on the pylon must be easy to reach.
The Palfinger PA 1002 lifting platform and the Palfinger PFD 99 positioner have been specially developed for this task. By using them together, it is possible to carry out extensive work on the contact wire and suspension cable quickly and efficiently. |
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PA 240 - Optimal kinematics for working under contact wires
The PA 240 lifting platform is the ideal unit for the construction and maintenance of overhead contact systems. The first arm can be moved out below the current wire and the second arm with the working cage can be raised up or lowered down. As a result, the contact wires are optimally protected against damage. Because the working cage can be lowered down, it is easy to load materials and tools directly into it from the vehicle’s side doors. Even working areas well below rail level, such as pylon fastenings on bridges, can be reached safely and without difficulty.
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PA 360 - Leading technology for the construction and maintenance of overhead contact systems
The PA 360 lifting platform is Palfinger’s leading product for the construction and maintenance of overhead contact systems. It incorporates two endlessly turning slewing mechanisms with solid slewing rings. As a result, the first arm can be moved out under the contact wire and the second arm can be turned parallel to the contact wire or to any position required. What’s more, the second arm with the working cage can be moved up or down. The entire chain system is therefore optimally accessible and at the same time optimally protected against damage. The maximum working height extends to 20.5 metres above rail level. |
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Overhead contact systems provide the railway motive power units with the required electrical energy. The mechanical current collectors on the rapidly travelling trains require contact wires which have been suspended with particularly high precision. The entire system of energy transfer must therefore be regularly inspected to ensure that it can meet the high demands placed on it.
Constantly increasing train sequences mean that only very short periods of time are available for carrying out this work.
A PKR 750 with attached roller head permits the complete replacement of the suspension cable and contact wire in a flowing process.
Working from a PA 240 lifting platform transported by a train unit, the suspension cable and contact wire are fastened directly onto the pylons.
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