IRS 70799-1-1ed.

Detail information

Designation: IRS 70799-1-1ed.

Publication date: 01/11/2019

Pages: 34

Country: International technical standard

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Anotation

This IRS contains recommendations required to ensure reliable interaction between pantographs and 1 500 V and 3 000 V DC overhead equipment for lines operated at speeds of over 160 km/h, as well as the parameters for the qualification of pantograph-OCL interaction and the definition of the interaction qualification indicator.
 
The values recommended reflect the state of the art and experience gained by the railways in the field of high speed rail whilst ensuring reliability and cost effectiveness.
 
A section is devoted to simulation programmes and measurement methods and includes suggestions on criteria to assess the validity of simulation models used, details about measurement of the contact force and measurement of electric arcs.
 
The basic OCL parameters stipulated or recommended as well design parameters including those relating to conductors and the physical parameters given for the two speed ranges in km/h:
 
160 < V ? 200, 200 < V ? 250, are set out so that these requirements may be applied to existing DC lines belonging to the European high speed network.
 
The basic parameters stipulated or recommended for OCL are classified into static, dynamic, electrical and climatic parameters.
 
The design parameters to be observed such as the design of supports, contact wire uplift at the support, sag at the reference temperature, permissible lateral deflection of the contact wire with maximum side wind, the number of spans per changeover of tensioning, contact wire run-in at stitches and contact wire tensioning are important for the OCL to operate properly at high speed.