Active standard | Published: 01/10/2025

IRS 70018-2ed.

Railway Application - Fixed Installations - Guidelines for OCL earthing systems for safety in railway tunnels

Available languages: English

Available design: electronic design (pdf)

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Detail information

Designation: IRS 70018-2ed.

Publication date: 01/10/2025

Pages: 48

Country: International technical standard

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Anotation

This IRS is prepared by UIC Energy and Electrical Traction Experts Group of the Rail System Forum to provide all the Railways with guidelines to better manage the safety in railway tunnels by appropriate OCL emergency earthing systems.

This document describes the systems, technologies, equipments and operations to perform disconnecting, securing against re-connection, verifying the dead status of OCL, carrying out the earthing sequence as well as the procedures to adopt for ascertaining the emergency earthing and the conditions to authorize rescue/emergency services to access tunnels.

In order to be applicable in Europe this document has been drafted in accordance with TSI "safety in railway tunnels". Even if the document is conformed to the European Regulation, the content of this IRS is valid, applicable and approved at worldwide level.

This document is applicable to high speed and conventional rail however not to light/urban rail.

It integrates in full or in part the following UIC leaflets:
- none

It aims to complement the following standards:
- none

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