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Integrated AC & DC Design & Analysis
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It's important to understand the Hazard/Risk Category levels listed in NFPA 70E, but just as important to understand the limitations of these tables.
This article explains how arc flash software is essential to identifying and analyzing high-risk arc flash areas, so you can help keep your electrical staff safer.
This article sheds some light onto the assumptions and generalizations utilized by the NFPA 70E Table 130.7(C)(9)(a) and to describe its limitations and shortcomings which may lead to an improper selection of Personal Protective Equipment (PPE).
Methods available for calculating the incident energy released by an arc fault in low-voltage equipment and considerations to determine the worst-possible hazard associated with energized work at different locations of the equipment.
This article presents different methods for assessing the hazards of high- and low-voltage 1-phase equipment. One common question being asked is how to determine the hazard level associated with 1-Phase (1-P) Arc Flash (AF) incidents. There is very little information about this type of circuit in the available guidelines such as CSA Z462-08, NFPA 70E 2009 & IEEE 1584 2002. If the right risk level is not properly determined, we run the risk of over-protecting or under-protecting personnel that are working on this type of electrical system. The objective of this article is to present different methods for assessing the hazards of high and low voltage 1-P equipment, and to justify the results taking into consideration the behavior of arc faults at different voltage levels.
This Paper investigates the impact of power system harmonics on the performance of over-current relays.