Railway Equipment ACIM – Advanced Catenary Installation Method Systems & Technologies
Index ACIM - Advanced Catenary Installation Method Phases of the catenary stringing Advantages of ACIM 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 2/20
ACIM - Advanced Catenary Installation Method ACIM - Advanced Catenary Installation Method - is the working system for stringing the conductors (ropes - wires) of an overhead contact line for electrification of railway infrastructure. This method allows to carry out simultaneously and in the shorter time possible all the working phases. It is used both for the electrification of "new railway lines“ and for the "renewal of the catenary". The Advanced Catenary Installation Method has been used with success for over 25 years in Europe. During this period the equipment have been designed and manufactured to develop and improve this method, each of them dedicated to a specific working phase. ACIM represents the best available working system for stringing the catenary at the final operating tension force. 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 3/20
ACIM - Advanced Catenary Installation Method The complete system is composed by: A. Traction Unit (self propelled rail truck): it has the function to tow the Constant Tension Stringing Wagon. Tesmec Traction Unit can operate at constant speed controlled by a PLC system. This provides the best working condition to the Constant Tension Stringing Wagon and to the operators. B. Flat wagon for goods transport C. Self propelled wagon with (crane and) platform for cable droppers installation: it has the function to apply the droppers between the conductor and the contact wire. Tesmec unit can perform these operations easily due a flexible working platform. 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 4/20
ACIM - Advanced Catenary Installation Method D. Constant Tension Stringing Wagon (also bidirectional type): it has the function to string with constant tension simultaneously all the cables of the lines at the same time. The conductors should be strung according to the mechanical tensions indicated by the manufacturers and with the maximum accuracy. The stringing system shall guarantee the same individual stringing force applied to the conductors from the beginning to the end of the operations without stressing the conductors. Tesmec Constant Tension Stringing Wagon assures the highest tension accuracy even in case of variation of towing direction, speed, air temperature and slope; world-class in case of computerised automatic models. E. Self propelled wagon with MAT and platform (advanced machine for cable positioning): it is a specifically designed self propelled truck, that working in combination with the Stringing Wagon, allows the stringing of the catenary on the cantilevers placed on the poles. It has the function to easy positioning of the cable to the posts. Tesmec unit can perform these operations easily due a flexible working platform and high performing MAT system. F. Multipurpose self propelled wagon equipped with developable working platform, hydraulic derricks and line pantograph to perform electrical and dynamic final tests 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 5/20
Stringing a new catenary 25 kV with n.1 messenger wire and n.1 contact wire The following drawing shows the system with a possible combination of equipment: A - Traction Unit (self propelled rail truck) D - Constant Tension Stringing Wagon C - Self propelled wagon with (crane and) hydraulic platform E - Self propelled wagon with MAT and hydraulic platform 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 6/20
Index ACIM - Advanced Catenary Installation Method Phases of the catenary stringing Advantages of ACIM 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 7/20
Introduction “Catenary stringing" consists in a series of operations carried out in sequence, to install the contact line ready to operate. We take into consideration only the technical operations, leaving out the civil works (excavations and foundations); from the poles installation to the catenary final test. The operations can be grouped into 5 different phases which are listed below: 1 st phase - poles installation on basements previously built 2 nd phase - cantilevers installation on poles 3 rd phase - cable(s) stringing (messenger wires - contact wires) 4 th phase - droppers installation 5 th phase - catenary final test 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 8/20
Phases layout 1 st PHASE - POLES INSTALLATION 2 nd PHASE - CANTILEVERS INSTALLATION ON POLES 3 rd PHASE - CABLE(S) STRINGING 4 th PHASE - DROPPERS INSTALLATION 5 th PHASE - CATENARY FINAL TEST 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 9/20
1 st Phase - Poles installation on basements The 1 st phase consists in poles installation on basements previously built. It is carried out by a traction unit (self propelled rail truck - A) equipped with hydraulic crane for the poles handling which are transported on a suitable flat wagon (B). 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 10/20
2 nd Phase - Cantilevers installation on poles The 2 nd phase consists in the cantilevers installation on poles. A self propelled wagon with platform (C), equipped with hydraulic crane is normally used to carry out this operation. A suitable flat wagon (B) is used to transport the pole cantilevers. These are fixed to the poles by the crane directly operated from the working platform. The self propelled wagon with hydraulic platform works also as traction truck of the flat wagon which transports the pole cantilevers. 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 11/20
3 rd Phase - Cable(s) stringing The 3 rd phase consists in the cable(s) stringing, messenger wires - contact wires. The constant tension stringing system guarantee the installation of the conductors at the final operating tension. This system allows the operators to carry out the next phase (droppers installation) in shorter time because the conductors are already properly positioned on their cantilevers. The system also allows to save time because more than one operation is carried out at the same time. This phase is performed by a traction unit (self propelled rail truck, A), a constant tension stringing wagon (D) and a self propelled wagon with MAT and hydraulic platform (E). 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 12/20
4 th Phase - Droppers installation The 4 th phase consists in installation of vertical wires called droppers. They connect the contact wire to the messenger wire and the job is completed. This phase starts after the self propelled wagon with MAT and platform fixes the messenger wire to the pole cantilevers. This is possible because the conductors are tensioned at the final operating tension. The messenger wire on the pole cantilevers will not vary its position as well the pole cantilevers will be kept orthogonal to the poles. This phase is carried out by is a self propelled wagon with hydraulic platform (C) able to carry at least two operators and a certain number of droppers. Normally more than one self propelled wagon are required. 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 13/20
5 th Phase - Catenary final test The 5 th phase consists in the catenary final test, in order to check the right position of the contact wire (height and wires off-set) and eventually carry out the necessary adjustments. A dedicated machine called “multipurpose self propelled wagon" (F) is used to carry out this operation. It is equipped with developable working platform, hydraulic derricks to support and move away the catenary from the pole cantilevers and allow the adjustment of the position, line pantograph to perform electrical and dynamic final tests and to draw up documents showing the correct position of the contact wire, for own use as well as for client use. 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 14/20
Index ACIM - Advanced Catenary Installation Method Phases of the catenary stringing Advantages of ACIM 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 15/20
Advantages of ACIM The aims of the “ACIM” is the construction of the Electrified Catenary for Railway Lines with the most accurate tension in the shorter time possible. Accuracy This system is in continuous development. Actually the construction of high speed train increase again the tension accuracy requirement for contact and messenger wires. It is essential that the tension applied on them is constant all times during the stringing operations, from the beginning to the end of one complete section (approx. 1400-1600 meters). Performance With the latest Equipment designed by Tesmec and its partners and a well trained working team it possible today to complete a line section of 1400-1600 meters in less than two hours. Anyone in Railways construction knows how the time factor is important for a new line and crucial in case of maintenance of existing line. 12/10/2010 Tesmec Presentation-RE-SY-ACIM-EN-Rev 02 16/20
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