Section 3: Appendices B: Model One-Lines
Included is the one-line drawing of the electrical system as modeled in the power analytics software package used for the Arc-Flash study. This model is used for the arc flash and short circuit calculations in addition to being the base model for the coordination analysis. Note that some motors may appear as a lighter shade of grey, which signifies being “out of service”. This is done to ensure accuracy in the short circuit studies. The “out of service” motors have been accounted for in the TCC curves, as a load adder for total motor in-rush. Due to the nature of the software calculations, if these motors were not “out of service”, they would be accounted for twice for short circuit calculations.
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