Low Voltage Momentary Short Circuit Analysis Report Per Unit Method - IEEE Standards 141, 242
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1 Low Voltage Momentary Short Circuit Analysis Report Prepared By: Dan Laws Company: Dolphins Software Utility Co.: XFMR Type: Delta to Wye 1000 kva, 3Ø, 60Hz Voltages: 13,200V pri / 480V sec Impedance: 3.2% XR Ratio: 5.7 Supplied Information and Base Values Utility Line Starting Power: 1,000 MVA Base Line Voltage: 13.2 kv Base Transformer Power: 1,000 kva Base XR Ratio: 5.7 Cables' Resistence (R) Computed At: 25ºC Max. Available Fault L-L: 43,739 Amperes Max. Available Fault L-G: 30,669 Amperes Maximum Fault Amperes Protection Values Panel Name Ø Voltage Symmetrical Asymmetrical OCPD Type Duty Amperes OfficePanel H , ,916.7 LVPCB Office Panel G ,405 3,419 LVPCB Panel A LVPCB Panel A LVPCB Panel B LVPCB Panel C , ,343 LVPCB Panel D , ,027.8 LVPCB Shop Panel E , ,832.7 LVPCB Shop Panel F LVPCB MDP , ,208.3 LVPCB 2, ,013 4, ,405 4, , , , , , , , , , , , , , , , , ,044.1
2 Prepared By: Dan Laws Company: Dolphins Software Utility Co.: XFMR Type: Delta to Wye 1000 kva, 3Ø, 60Hz Voltages: 13,200V pri / 480V sec Impedance: 3.2% XR Ratio: 5.7 Supplied Information and Base Values Utility Line Starting Power: 1,000 MVA Base Line Voltage: 13.2 kv Base Transformer Power: 1,000 kva Base XR Ratio: 5.7 Cables' Resistence (R) Computed At: 25ºC Max. Available Fault L-L: 43,739 Amperes Max. Available Fault L-G: 30,669 Amperes MDP Utility Transformer 4-Sets (3) 600 kcmils, THHN, Transformer #2 MDP (3) 1/0 ga., THHN, Transformer #3 MDP (3) 1/0 ga., THHN, Transformer #1 MDP (3) 1/0 ga., THHN, Shop Panel F Transformer #1 (3) 3/0 ga., THHN, GAS HEATER Shop Panel F (1) 12 ga., THHN, LIFT Shop Panel F (2) 10 ga., THHN, GAS HEATER Shop Panel F (1) 12 ga., THHN, LIFT Shop Panel F (2) 10 ga., THHN, Shop Panel E Transformer #2 2-Sets (3) 3/0 ga., THHN, Receptacle Load #1 Shop Panel E (1) 12 ga., THHN, Receptacle Load #2 Shop Panel E (1) 12 ga., THHN, Receptacle Load #3 Shop Panel E (1) 12 ga., THHN, Receptacle Load #4 Shop Panel E (1) 12 ga., THHN, Receptacle Load #5 Shop Panel E (1) 12 ga., THHN, A A 5.46 A A 208V, 1Ø 6.58 A A 208V, 1Ø A 86,208 A 347,971 A none 878 A 97,316 A none 878 A 3,787 A none 878 A 6,020 A none 878 A 3,787 A none 878 A 6,020 A none 1,833 A 97,316 A none
3 Panel D MDP (3) 3/0 ga., THHN, W-HEATER Panel D (3) 14 ga., THHN, W-HEATER Panel D (3) 14 ga., THHN, Air Handler Panel D (3) 14 ga., THHN, Air Handler Panel D (3) 14 ga., THHN, A 9.38 A 277V, 3Ø 9.38 A 277V, 3Ø A/C UNIT Panel D (3) 8 ga., THHN, A A/C UNIT Panel D (3) 10 ga., THHN, Panel C Transformer #3 (3) 3/0 ga., THHN, Wash-Bay Lights Panel C (1) 12 ga., THHN, Shop EXIT-Lights Panel C (1) 12 ga., THHN, Office Lights #1 Panel C (1) 14 ga., THHN, Office Lights #2 Panel C (1) 14 ga., THHN, A A A 1,028 A 97,316 A none 1,028 A 9,575 A none 1,343 A 97,316 A none
4 Office Lights #3 Panel C (1) 14 ga., THHN, Office Lights #4 Panel C (1) 14 ga., THHN, Canopy- Lights Panel C (1) 14 ga., THHN, EXTERIOR-Lights Panel C (1) 12 ga., THHN, EMERG-Lights Panel C (1) 12 ga., THHN, EMERG-Lights Panel C (1) 12 ga., THHN, Panel B MDP (3) 4/0 ga., THHN, A Air Compresser Panel B (3) 2 ga., THHN, A Air Dryer Panel B (3) 14 ga., THHN, Panel A MDP (3) 250 kcmils, THHN, A A Booth 2 Panel A (3) 3 ga., THHN, A Prep Station Panel A (3) 3 ga., THHN, A Sanding Station Panel A (3) 8 ga., THHN, A Mixing Room Panel A (3) 10 ga., THHN, Welder-Spot Panel A (3) 10 ga., THHN, Panel A-1 MDP (3) 3/0 ga., THHN, A A Prep-Station Panel A-1 (3) 3 ga., THHN, A Booth 1 Panel A-1 (3) 3 ga., THHN, A Welder-Spot Panel A-1 (3) 10 ga., THHN, Welder-Spot Panel A-1 (3) 10 ga., THHN, 744 A 122,718 A none 744 A 38,486 A none 744 A 2,384 A none 542 A 144,988 A none 542 A 30,517 A none 542 A 30,517 A none 542 A 9,575 A none 542 A 6,020 A none 542 A 6,020 A none 234 A 97,316 A none 234 A 30,517 A none 234 A 30,517 A none 234 A 6,020 A none 234 A 6,020 A none
5 Office Panel G Transformer #1 (3) 3/0 ga., THHN, Receptacle Load #3 Office Panel G (1) 12 ga., THHN, Receptacle Load #1 Office Panel G (1) 12 ga., THHN, Receptacle Load #5 Office Panel G (1) 12 ga., THHN, Receptacle Load #2 Office Panel G (1) 12 ga., THHN, Receptacle Load #7 Office Panel G (1) 10 ga., THHN, Receptacle Load #4 Office Panel G (1) 12 ga., THHN, Receptacle Load #6 Office Panel G (1) 12 ga., THHN, GFCI Receptacle Load #8 Office Panel G (1) 12 ga., THHN, A OfficePanel H Office Panel G (3) 1 ga., THHN, A Receptacle Load #1 OfficePanel H (1) 14 ga., THHN, Receptacle Load #2 OfficePanel H (1) 14 ga., THHN, Receptacle Load #3 OfficePanel H (1) 14 ga., THHN, Receptacle Load #4 OfficePanel H (1) 14 ga., THHN, Receptacle Load #5 OfficePanel H (1) 14 ga., THHN, 3,419 A 97,316 A none 3,419 A 6,020 A none 2,917 A 48,539 A none
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