Documents electrical hazards 11 results

Mortality patterns of a cohort of 31,068 U.S. electrical workers who primarily worked in the construction industry were evaluated between 1982 and 1987. Comparison to the U.S. population by using the NIOSH life table showed significantly elevated proportionate mortality (PMR) for many causes. Excess mortality for leukaemia and brain tumors is similar to reports of electrical workers with occupational exposure to electric and magnetic fields in the electric utility or manufacturing industry. Excess deaths due to melanoma skin cancer are consistent with findings of other polychlorinated biphenyl-exposed workers. A significantly elevated PMR was observed for the diseases caused by asbestos (lung cancer, asbestosis, and malignant mesothelioma), and from fatal injuries, particularly electrocutions. The findings of statistically significant excess deaths for prostate cancer, musculoskeletal disease, suicide, and disorders of the blood-forming organs were unexpected.

"BACKGROUND Financial incentives, such as preferential feed-in tariffs for producers of solar-generated electricity, have supported solar photovoltaic installations in many countries all over the world.The costs of such installations, however, can be high. These include the cost for the photovoltaic array field, which converts sunlight into electric power; for the power inverter, which converts the voltage from direct current to alternating current; and for the low-to-high voltage transformer that connects the system to the distribution grid.If one of these components fails, the repair or replacement costs must be added, in which case, the payback period of the installation owner's investment increases.OBJECTIVES Since failures may occur due to overvoltages and/or overcurrents caused by atmospheric phenomena, i.e., due to the effects of lightning strikes, this paper proposes a way to select lightning protection measures to safeguard photovoltaic systems (PV array fields) from direct or nearby lightning flashes.METHODS The method proposed is based on lightning risk assessment in accordance with the requirements of standard IEC 62305-2.RESULTS On the basis of the extent of the risk posed by lightning, it is suggested to adopt suitable protection measures, which may be drawn from the standards of the IEC 62305 series and from the guide IEC 61173."

"En raison de la multiplicité de ses fonctions, la main se trouve très fréquemment en situation dangereuse. Les risques découlant de l'activité professionnelle peuvent être classés selon la nature du travail en trois catégories : - les risques mécaniques - les risques thermiques et électriques, - les risques chimiques. Bien souvent, ces risques se manifestent lors d'opérations de manipulation, de préhension, levage, transport de charges. Les causes des accidents et des maladies professionnelles de la main sont insuffisamment traitées dans le système actuel de prévention. Elles justifient la mise en place d'une prévention spécifique par des actions ciblées."

"L'objectif du document est de présenter des outils dirigeant le regard sur tous les aspects techniques, organisationnels et humains qui déterminent la problématique des risques électriques. Conformément à la stratégie SOBANE de gestion des risques professionnels, cette brochure décrit une méthode à quatre niveaux : dépistage, observation, analyse et expertise qui devrait permettre de remettre le problème des risques électriques dans le contexte général de la situation de travail. La brochure comprend une série de fiches d'aide.
Elle a été rédigée par le professeur Jacques Malchaire, chef de l'unité hygiène et physiologie du travail de l'UCL, qui a coordonné le projet SOBANE cofinancé par le SPF emploi, Travail et Concertation sociale et le Fonds social européen."

"The standards organizations CEN and CENELEC were commissioned by the EU Commission in its Mandates M/015 and M/083 to consider the relevant non-electrical hazards in standards supporting the Low Voltage Directive (73/23/EEC) which relate to machinery as if the essential health and safety requirements of the Machinery Directive (89/392/EEC) applied directly to the machines in question.
The present study provides a comprehensive overview of the current state of progress of the electrotechnical standards to be revised in accordance with the above Mandates. The results have been obtained by the commissioned party's own analyses and by consultation with experts.
The standards in the series EN 50144: "Safety of hand-held electric motor operated tools", EN 60335: "Safety of household and similar electrical appliances" and EN 61029: "Safety of transportable motor-operated electric tools" listed in the annex of Mandate M/083 were subjected to particular review in this study. In the process, the standards reviewed were found to be in need of revision, in some areas considerable, with regard to certain essential hazards. ..."