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This study is performed in order to determine the appropriate type of protective device, location and settings for adequate equipment protection. Sufficient operating times are maintained to allow for inrush currents experienced when energizing transformers or starting motors.
Why do we need it?
This effectively reduces the amount of equipment affected by an overcurrent trip and the amount of incident energy a technician is subjected to in the event of an arc-flash. The fault current will open equipment nearest to the fault to avoid overall system blackout.
Produces time-current coordination curves that illustrate coordination among devices shown on one line diagrams.
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