Short-circuit value increases due to load growth and due to increase in the capacity of the facility and electric utility power systems. Changes in the configurations of the transmission and distribution system also result is significate changes in the short circuit values.
Therefore, short circuit studies need to occur when power system is originally designed and on a regular basis, at least every 4-5 years.
To be in compliance with the national electric code, the short circuit rating of buses and interrupting devices shall be higher than the calculated fault current at the equipment. Short circuit current above the equipment ratings can cause catastrophic losses.
In the study we provide the percentage of rated short circuit current and identify all devices and equipment with insufficient rating.
Short circuit study is very important because it is the bases for protective device settings and coordination as well as the arc flash study.
Investing in these studies greatly enhances the reliability and safety of the electric power systems.
We can perform the analysis based on ANSI or IEC standards based on the client requirement.
We can use ETAP or SKM depending on the client requirements.