![]() * Design safer power systems while insuring compliance with NEC 110. Wearing inadequate clothing is dangerous for obvious reasons, but wearing too much clothing is dangerous due to limited mobility and visibility * Provide a safer working environment by specifying the proper level of personal protective equipment. * Calculator-style interface makes complex calculations easy to understand * Add fuse and circuit breaker data including time-current characteristics for the devices that are not already featured in the built-in protection device library * Instantly determine arcing current, incident energy, arc flash, limited, restricted, prohibited approach boundaries, hazard risk category, typical clothing system * Collect information, take photos of switchgear, MCC's etc. ![]() ![]() * Detailed analysis using the IEEE 1584 equations and the Lee method Next, the incident energy, arc flash boundary, shock protection boundaries and level of personnel protective equipment are determined based on equipment configuration, selected upstream protection device ratings and working distance. The iAFA arc flash software predicts arcing fault current for a given configuration and amount of the available 3-phase short circuit current. The arc flash software enables calculations for both of the above considered cases. The IEEE 1584 proposed solution is to make two arc current and energy calculations: one using the calculated expected arc current and another one using a reduced arc current that is 15% lower. Incident energy is linear with time, and consequently arc current variations may have a big effect on incident energy. The arc flash software takes equipment configuration, gap between electrodes, grounding type, short circuit fault current value and system voltage on input, and determines arcing fault current at potential point of fault.įor protective devices operating in the steep portion of their time-current curves, a small change in current causes a big change in corresponding operating time. * system line voltages in the range of 208V to 15kVįor cases where voltage is over 15kV or gap is outside the range of the model, the theoretically derived Lee method can be applied and it is included in iAFA V1.0 * short circuit currents in the range of 700A to 106kA Those conducting flash hazard analyses must consider this boundary, and then must determine what PPE should be worn within the flash protection boundary. The IEEE 1584 empirically derived model was chosen for arc flash analysis due to the model's capability to accurately account for a wide variety of setup parameters including: The IEEE 1584 arc flash boundary equations can also be used to calculate the arc flash boundaries with boundary energy other than 1.2 cal/cm 2 such as onset to 2nd degree burn energy. The Arc Flash Analytic software has been developed based on IEEE 1584 Guide for Performing Arc-Flash Hazard Calculations as an easy to use and comprehensive tool for calculating incident energy and arc flash boundary, for determining limited, restricted, prohibited approach boundaries and hazard risk category required by NFPA 70E, NEC / CEC and OSHA when work is to be performed on or near the energized equipment.
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