RESONANT SOURCE FOR THE SUPPLY OF ELECTRIC FIELD PROBE CALIBRATION SYSTEM AT FREQUENCIES BETWEEN 50Hz AND 50KHz
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2010, Vol 34, Issue 34
Abstract
Electromagnetic environmental conditions checking and provision regarding long and short time human personal and occupational exposure is regulated by international standards. Generally, the human being is exposed mainly to the field generated by the 50 Hz low, medium and high voltage equipments or transmission lines of the electric power system but in industrial applications also higher frequencies are used in certain technological processes. This low and medium frequency electric fields have values in the range 0.5V/m − 100kV/m for frequencies within 5Hz and 400kHz. Modern electric field measuring devices works on one or three axes, with software for measured data acquisition & storage and sometimes with the possibility of GPS source localization. In Romania, there are no installations for the periodical calibration of the instruments for low and medium frequency electric field measurement. The calibration in accredited foreign laboratories is expensive and the said instruments are used almost exclusively based on the certificates issued by supplier at purchasing. The paper presents an innovative calibration solution based on a double resonant source which enables field strengths up to 100 kV/m to be achieved in a wide frequency range within 50Hz and 50kHz.
Authors and Affiliations
Andrei MARINESCU
Keywords
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