DBPapers
DOI: 10.5593/sgem2017/13/S03.006

AN IMPROVEMENT ON THE IMPACT RESISTANCE TESTS FOR EXPLOSION-PROOF ELECTRICAL EQUIPMENT

V. M. Pasculescu, N.I. Vlasin, M. C. Suvar, G. D. Florea, E. Ghicioi
Monday 11 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-00-1 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 13, 39-46 pp, DOI: 10.5593/sgem2017/13/S03.006

ABSTRACT

Testing and certification of explosion-proof electrical equipment required for product conformity assessment are extremely important, taking into account the unexpected hazard of explosion occurrence due to potentially explosive atmospheres generated by mixtures of air-gas/dust. The explosion risk has to be minimized in order to ensure the health and safety of people and for preventing material damages. The new European Directive which regulates the protection to explosion field is the ATEX Directive 2014/34/EU which covers equipment and protective systems intended for use in potentially explosive atmospheres. The Directive replaces the previous Directive 94/9/EC, it defines the essential health and safety requirements and conformity assessment procedures, to be applied before products are placed on the EU market. According to the regulations and specific standards in force, electrical equipment used in potentially explosive atmospheres have to be subject to various tests, according to their destination. The impact resistance test is performed on a specific test stand, and it is a qualitative type of test. The paper presents an improvement of this type of test, by adding a force cell and by measuring, recording and analyzing (using specific software) the forces which are generated over the equipment tested. Several equipment, with different types of protection to explosion, used in industries with potentially explosive atmospheres, other than mines (ie. oil&gas industry) are subjected to this quantitative type of test. Results obtained from the physical test analysis will be used for calibrating computational simulations of the impact resistance test, which will represent a useful tool for further analysis performed on equipment and protective systems intended for use in potentially explosive atmospheres.

Keywords: explosive atmosphere, force, intrinsic safety, impact resistance test, type of protection