Evaluating exposure from electric fields in a high voltage switchyard according to the EU directive
Journal article, 2019

An assessment according to Directive 2013/35/EU of exposure in a 400 kV switchyard has been performed. Part of the body was exposed to electric field strength above the high action level. We therefore performed simulations of the electric fields induced in the body to assess these accoding to the exposure limit values (ELVs). The simulations show that as long as the body is not grounded nor touching any grounded metallic objects, worker exposure is compliant with the directive. When grounded metallic objects are touched with hand or foot the ELV are exceeded. The ELV is exceeded already at very low contact currents (2-3 mu A) in the finger. If not appropriate measures are taken, this would lead to a severe limitation of the work tasks that can be performed in switchyards.

worker exposure

contact current

electric field


EU directive


Yngve Hamnerius

Chalmers, Electrical Engineering, Signal Processing and Biomedical Engineering

Tomas Nilsson

Torptronics Engineering

Edward Friman

Swedish national grid

Journal of Radiological Protection

0952-4746 (ISSN) 1361-6498 (eISSN)

Vol. 39 1 150-160

Subject Categories

Biomedical Laboratory Science/Technology

Vehicle Engineering

Environmental Health and Occupational Health





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3/5/2019 9