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According to IEC 60050 definition, live working is “an activity in which a worker makes contact with energized parts or encroaches inside the live working zone with either parts of his or her body or with tools, devices or equipment”. Live working is a worldwide used maintenance and repair methodology in electricity systems. In other words, it is possible to perform maintenance and repair works on...
In the field of Standards, regulations and legal aspects it is important to underline the use of IEC and CENELEC standards used to protect the electrical worker against an Arc Flash. This presentation gives a practical overview of the standardization on the subject.
Huge energies being released in electric power equipment, there is a high risk for human injury due to electric fault arcs. Persons working at electric power equipment will have to be protected efficiently, particularly, if direct arc exposure is likely. Additionally to technical and organizational control measures, Personal Protective Equipment (PPE) may essentially contribute to prevent injuries...
Today there is an increasing number of DC applications where powerful DC fault arcs are likely to occur. These arcs are of potential risk for persons while working at the DC power equipment. DC arc conditions have not yet been analysed very well. There is a lack of information and detailed strategies on how to protect workers against short-circuits with fault arcs in DC power systems. Laboratory measurements...
Cutting-off of 2-phase and 3-phase arcing faults in 400 V systems by means of LV fuse links has been analyzed in laboratory arc test series, with measuring the remaining arc energy and thermal incident energy converted in the fault arcs and limited by the fuse operation. The conditions were determined under which personal protection may be submitted by using of PPE class 1 and class 2 according to...
According to European and worldwide OSHA regulation and existing arc testing standards it is necessary for people in charge to select appropriate PPE in order to the arc energy level at the working place. Cause of two existing different arc assessment methods it's up to the manager to decide which assessment method is the proper one. While the arc assessment on the basis of NFPA 70E and IEEE 1584...
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