Transcription of Appendix 9C: Design Calculations for Electrical Design
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Appendix 9C: Design Calculations for Electrical Design
Chapter 9 Electrical Design SPU Design Standards and Guidelines November 2020 i Appendix 9C Design Calculations for Electrical Design Chapter 9 Electrical Design Appendix 9C Design Calculations for Electrical Design ii SPU Design Standards and Guidelines November 2020 Contents 1. Introduction .. 1 2. Software .. 1 3. Calculation Matrix .. 2 4. Basic Requirements for Electrical Calculations .. 4 5. Basic Electrical Engineering Formulas .. 4 List of Symbols .. 4 Direct Current (DC) Formulas .. 5 Alternating Current (AC) Single Phase .. 5 Alternating Current (AC), Three-Phase .. 5 Motors .. 6 Power Factor Correction .. 7 6. Sample Calculations .. 7 Load .. 7 Generator Sizing .. 7 Sizing Procedures for Generator Single or Multi-sets .. 8 Definitions: Generator Sizing .. 8 Underlying Equations .. 8 Conductor Size, General .. 10 Conduit Size and Fill .. 13 Motor Branch Circuit .. 14 Power Factor Correction Capacitors .. 16 Transformer Primary and Secondary Conductors.
Table 9C-1 describes electrical calculation required for projects, tools to do the calculations, who is responsible for the calculations, and when they should be done. Table 9C-1 Calculations for Electrical Design Calculation Description Required Tools1 Req’d All Req’d Cond2 By Engr3 By Cntr3 Design Phase (%) Load - facility, switchgear, MCC
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