On the 1st of February 2000, the regulations for the protection against non-ionised radiation (NISV) came into effect in Switzerland. This subject is a major concern for railway facilities, and ENOTRAC has experience in many of the relevant fields.
We measure the magnitude of the magnetic fields emitted by the existing facilities, such as overhead wires or substations. The measurements are used by the facility owners as proof of compliance with the legal limits. The measurements are also used by builders to get a feeling of the actual magnetic field density when constructing near railways.
In accordance with article 11 of the NISV, details of the non ionising radiation must be provided for each overhead line system for approve of design by the government. It must be verified that the NISV limits are respected in all sensitive places (PSU).
The verification of the limits is based on simulations with our simulation tools SIMNET and EMFCALC. Thereby the magnetic fields are calculated based on the simulated models.
In order to create calculations, a detailed model of the traction power system (contact wires, rails, earth wires, transmission lines etc.) in the affected area is created. The current used in these models is based on simulations and/or measurements.
Various validation measurements served as plausibility checks for the simulation model in SIMNET
ENOTRAC has verified compliance with NISV on a number of projects, including:
In accordance with NISV, details of the non ionising radiation must be provided for each electrical substation planning application. It must be proven that the NISV limits are respected in all sensitive places (PSU). We have used our simulation tools for following electrical substations:
On behalf of the Federal office for the environment (FOEN), ENOTRAC undertook a cost benefit analysis of the potential methods of reducing the magnetic flux density of the overhead systems. This study is available for download (in German) on the website of the FOEN.
Additionally, ENOTRAC was heavily involved in the development of an implementation aid for non-ionised radiation (NISV) protection for the FOEN, and has also conducted some basic research, and developed numerical tools.
ENOTRAC AG, Seefeldstrasse 8, 3600 Thun, Switzerland, Tel: +41 33 346 66 11, Fax +41 33 346 66 12
ENOTRAC SA, Avenue de la Gare 1, 1003 Lausanne, Switzerland, Tel: +41 33 346 66 19, Fax +41 33 346 66 12
ENOTRAC UK Ltd, Chancery House St Nicholas Way Sutton, Surrey SM1 1JB England, Tel: +44 20 8770 3501