Zero-Sequence Impedance and Incident Energy
A question that I am often asked either on-line or in one of my arc flash training classes is in regards to incident energy calculations and line-ground short circuit current: […]
Short Circuit Calculations with Transformer and Source Impedance
Short Circuit Calculations – Transformer and Source Impedance An infinite bus short circuit calculation can be used to determine the maximum short circuit current on the secondary side of a […]
Utility Short Circuit Data – Different Formats
National Electrical Code 110.9 Interrupting Ratings states that: Equipment intended to interrupt current at fault levels shall have an interrupting rating at nominal circuit voltage at least equal to the current that […]
Short Circuit Data – Per Unit, Amps and Symmetrical Components
Making Sense of the NumbersUtility Company Short-circuit Data For Arc Flash Studies Electrical Contractor Magazine – November 2012Jim Phillips, P.E. One of the first steps in performing an arc flash […]
New to Arc Flash, Short Circuit and Coordination studies
Hi. I currently work as an Engineer in the energy management field. I would like to branch off in to doing Arc Flash, Short Circuit and Coordination Studies. How would […]
Short Circuit Calculations and Conduit Material
I recently came across a previous study that was completed for a facility that assumed a specific type of conduit [non-metallic/magnetic; PVC] vs what was actually installed [Rigid Meal Conduit], […]
