IEEE 1584

IEEE Std 1584-2018(Guide for Performing Arc-Flash Hazard Calculations) is a standard of theInstitute of Electrical and Electronics Engineersthat provides a method of calculating the incident energy ofarc flashevent.

Purpose

IEEE 1584-2018 is an update to IEEE 1584-2002 and was developed to help protect people from arc-flash hazard dangers. The predicted arc current and incident energy are used in selecting appropriate overcurrent protective devices andpersonal protective equipment(generally abbreviated as PPE), as well as defining safe working distance. Since the magnitude of the arc current is inherently linked with the degree of arc hazard, the arc is examined as a circuit parameter. Furthermore, since estimations are often useful, simple equations for predicting ballpark arc current, arc power, and incident energy values and probable ranges are presented in this work.

Procedure

Arc Flash Hazard calculations are currently implemented in most of the industry plants due toOSHAregulations.The IEEE 1584empiricallyderived model accurately accounts for a wide variety of setup parameters including:

• Voltagesin the range of 208–15,000 V, three-phase.
• Frequenciesof 50 Hz to 60 Hz.
• Bolted fault current in the range of 700–106,000 A.
• Grounded or ungrounded.
• Equipment enclosures of commonly available sizes with various conductor configurations, or open air.
• Gaps betweenconductors.
• Faults involving three phases.

For cases where voltage is over 15 kV or gap is outside the range of the model, the theoretically derived Lee method can be applied.

IEEE 1584.1 is a guide published in July 2022 for the specification of requirements for an Arc Flash Hazard Calculation study in accordance with the IEEE 1584 Standard.