Transcription of Short Circuit Current Calculations - Electrical Sector
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Short Circuit Current Calculations - Electrical Sector
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. This worst case condi- Interrupting Rating tion should be used for interrupting rating, component protection and selective coordina- Component Protection tion.
192 ©2005 Cooper Bussmann Short Circuit Current Calculations Introduction Several sections of the National Electrical Code® relate to proper overcurrent pro-tection. Safe and reliable application of overcurrent protective devices based on
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Short-Circuit Current Calculations, ELECTRICAL, Electrical Circuit Calculations, Electrical Calculations Workbook, Circuit, Calculations are Essential for Critical, Calculations, ELECTRICAL CIRCUITS Electrical Circuits, Electrical Circuits, Basic electrical engineering, Chapter, Motor Calculations Refer to pg. 49, ATech Training, Inc