Transcription of Short Circuit Current Calculations - Eaton
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Short Circuit Current Calculations - Eaton
Short Circuit Current Calculations Introduction Several sections of the National Electrical Code relate to proper overcurrent pro- Normally, Short Circuit studies involve calculating a bolted 3-phase fault condition. This tection. Safe and reliable application of overcurrent protective devices based on can be characterized as all 3-phases bolted together to create a zero impedance these sections mandate that a Short Circuit study and a selective coordination study connection. This establishes a worst case (highest Current ) condition that results in be conducted. These sections include, among others: maximum three phase thermal and mechanical stress in the system. From this calculation, other types of fault conditions can be approximated.
©2005 Cooper Bussmann 193 Short Circuit Current Calculations Three-Phase Short Circuits Basic Point-to-Point Calculation Procedure Step 1. Determine the transformer full load amps (F.L.A.) from
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