![]() ![]() The new standard applies a correction factor based on system voltage, electrode configuration, enclosure height, enclosure width and enclosure depth. Generally, the incident energy decreases as enclose size increases: Previously, a distance factor based on equipment type and voltage was used to account for the effect of enclosure size. VOA: Vertical electrodes in open air Enclosure SizeĬonsideration of enclosure size is refined in the new standard. The previous version of the arc flash model was based on vertical electrodes in open air or an enclosed box. Differentiation is now given to the following electrode configurations: The range of bolted fault current supported by the new arc flash model is now dependent on voltage: Low Voltage is reclassified as 208 V though 600 V, and no longer includes equipment up to 1000 V. The supported range of voltage in the new arc flash model remains unchanged at 208 V through 15 kV. Calculations for enclosed equipment greater than 2.4 kV are now based on test results, rather than extrapolation methods previously used. Try The Software - Free Demo Sign Up for One-on-One Session Voltage Try a free demo copy of EasyPower with the new IEEE 1584 updates, to see for yourself how these new changes make the implementation of the new standard simple and straightforward. You can also contact us if you have questions, or would like to schedule a one-on-one session with an application engineer, to help you get started with your EasyPower demo. See the Effects of the Changes in Calculations For Yourself The topics below address notable changes that should be considered when performing, administering, or complying with an arc flash risk assessment. The empirically derived formulas in the new model are significantly more accurate, though equally more complex than those in its predecessor. Consequently, a collaboration between IEEE and NFPA was formed to advance research around arc flash events and the variables that affect their severity.Īfter analyzing more than 1800 tests, the IEEE 1584 working group constructed a new arc flash model. However, subsequent IEEE papers shed light on parameters not previously considered that could lead to increased hazard levels beyond those predicted by the original standard. IEEE 1584 has remained mostly unchanged since its original publication in 2002, with two minor amendments in 20. The guide is recognized by federal agencies, such as OSHA, and consensus standards, such as NFPA 70E, as a method to estimate arc flash boundary and incident energy when performing an arc flash risk assessment. IEEE 1584 Guide for Performing Arc Flash Hazard Calculations is a widely adopted and industry accepted standard that includes procedures to calculate and predict arc flash hazard levels. Arc Flash Hazard Calculations Using IEEE 1584-2018 Introduction to the Changes in IEEE 1584-2018 ![]()
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