ML23107A017
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DSAR CHAPTER 8 - ELECTRICAL SYSTEMS TABLE 8-1 Revision 36 Page 1 of 1 SWITCHYARD SYSTEM RATINGS AND CONSTRUCTION OF COMPONENTS Breakers - 345 kV Nominal
- 3,000 A Continuous
- 63,000 A Momentary Insulators - 1,050 kV BIL Main Bus - 3,000 A Bay Bus - 2,000 A Disconnect Switches - 345 kV Nominal
- 2,000 A Continuous
- 70,000 A Momentary
DSAR CHAPTER 8 - ELECTRICAL SYSTEMS TABLE 8-2 Revision 36 Page 1 of 1 4,160 VOLT SYSTEM RATINGS AND CONSTRUCTION OF COMPONENTS Bus - 2,000 A Continuous Ratings Incoming Breakers - 2,000 A, 350 MVA Interrupting Feeder Breakers - 1,200 A, 350 MVA Interrupting Station Power Transformer 1-1 4.16-4.16 kV, 22.5/25.2 MVA, 55°/65°C 3-Winding Connected Delta-Wye-Wye Start-Up Transformers 1-1, 1-3, - 345-13.2-4.16-4.16 kV, 22.5/25.2 MVA, 4-Winding Connect Wye-Wye-Wye With 55°/65° a Delta Tertiary Station Power Transformer 1-3, - 345-2.4-4.16-4.16 kV, 4-Winding Connected Wye-Wye-Wye 22.5/25.2 MVA,55°/65°C With a Delta Tertiary
DSAR CHAPTER 8 - ELECTRICAL SYSTEMS TABLE 8-3 Revision 36 Page 1 of 1 2,400 VOLT SYSTEM RATINGS AND CONSTRUCTION OF COMPONENTS Safeguard Transformer 1-1 - 354-2.52 kV, 3 Ph, 60 Hz, 10.5 OA, 2-Winding, Wye Grounded-Delta 13.125 Future FA, 65°/65°C Automatic Load Tap Changer Station Power Transformer 1-2 - 21-2.4 kV, 3 Ph, 60 Hz, 8/9 MVA OA, 2-Winding, Delta-Delta 55°/65°C Start-Up Transformer 1-2 - 345-2.52 kV, 3 Ph, 60 Hz, 2-Winding, Wye Grounded-Delta 10.5 MVA ONAN, 55°C Automatic Load Tap Changer Bus - 2,000 A Continuous Rating Incoming Breakers - 1,200 A Continuous, 250 MVA Interrupting Feeder Breakers - 1,200 A Continuous, 150 MVA Interrupting Safeguard Bus - 3,000 A Continuous Rating Incoming Breakers - 3,000 A Continuous, 350 MVA Interrupting
DSAR CHAPTER 8 - ELECTRICAL SYSTEMS TABLE 8-4 Revision 36 Page 1 of 4 480 VOLT SYSTEM RATINGS AND CONSTRUCTION OF COMPONENTS 480 V Load Centers 11, 12, 13, 14, 15, 16 Transformers - 750 kVA AA, 3 Ph, 60 Hz, 2,400-480 V Bus - 1,000 A Continuous, 50,000 A RMS Symmetrical (Load Centers 11, 12, 13, and 14)
- 1,200 A Continuous, 25,000 A Asymmetrical (Load Centers 15 and 16)
Load Center Feeder - 22,000 A RMS Symmetrical (Load Centers 11, Breakers - Interrupting 12, 13 and 14)
Current - 18,000 A RMS Symmetrical (Load Centers 15 and 16) 480 V Motor Control Centers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Horizontal Bus - 600 A Continuous, 25,000 A RMS Symmetrical Vertical Bus - 300 A Continuous, 25,000 A RMS Symmetrical Molded Case Breakers - - 14,000 A RMS Symmetrical Interrupting Current 480 V Load Center 17 Transformer - 2,000 kVA AA, 3 Ph, 60 Hz, 4,160-480/277 V Bus - 3,200 A Continuous, 65,000 A RMS Symmetrical Load Center Feeder - 50,000 A RMS Symmetrical Breakers - Interrupting Current 480 V Load Centers 19, 20 Transformer - 750/1,000 kVA AA/FA, 3 Ph, 60 Hz, 2,400-480 V Bus - Equal to Capacity of Largest Breaker
DSAR CHAPTER 8 - ELECTRICAL SYSTEMS TABLE 8-4 Revision 36 Page 2 of 4 480 VOLT SYSTEM RATINGS AND CONSTRUCTION OF COMPONENTS Load Center Feeder - 14,000 A RMS Symmetrical (MCC 21 and 23)
Breakers - Interrupting 22,000 A RMS Symmetrical (MCC 22 and 24)
Current 480 V Motor Control Centers 21, 22, 23, 24 Horizontal Bus - 600 A Continuous, 42,000 A RMS Symmetrical Vertical Bus - 300 A Continuous, 42,000 A RMS Symmetrical Molded Case Breakers - - 10,000 A RMS Symmetrical Interrupting Current 480 V Motor Control Centers 25, 26 Horizontal Bus - 600 A Continuous, 42,000 A RMS Symmetrical Vertical Bus - 600 A Continuous, 42,000 A RMS Symmetrical Molded Case Breakers - - 25,000 A RMS Symmetrical Interrupting Current 480 V Load Centers 77, 78 Transformers - 500 kVA, 3 Ph, 60 Hz, 2,400-480 V Bus - Equal to Capacity of Largest Circuit Breaker Load Center Feeder - 22,000 A RMS Symmetrical Breakers - Interrupting Current 480 V Motor Control Centers 79, 80, 81, 82, 87 Horizontal Bus - 600 A Continuous, 25,000 A RMS Symmetrical (MCC 79, 80, 81, 82)
Vertical Bus - 300 A Continuous, 25,000 A RMS Symmetrical (MCC 79, 80, 81, 82)
- 600 A Continuous, 35,000 A RMS Symmetrical (MCC 87)
DSAR CHAPTER 8 - ELECTRICAL SYSTEMS TABLE 8-4 Revision 36 Page 3 of 4 480 VOLT SYSTEM RATINGS AND CONSTRUCTION OF COMPONENTS Molded Case Breakers - - 14,000 A RMS Symmetrical (MCC 79, 80, 81, 82)
Interrupting Current - 35,000 A RMS Symmetrical (MCC 87) 480 V Load Centers 71, 72, 73, 74, 75, 76 (Cooling Towers)
Transformers - 1,500 kVA, 3 Ph, 60 Hz, 4,160-480 V Bus - 2,000 A Continuous, 42,000 A RMS Symmetrical Load Center Feeder - 42,000 A RMS Symmetrical Breakers - Interrupting Current 480 V Load Centers 90, 91, 200 Transformers - 750 kVA, 3 Ph, 60 Hz, AA, 2,400-480 V Bus - 1,200 A Continuous, 50,000 A RMS Symmetrical (Load Center 200)
- 1600 A Continuous (Load Centers 90 and 91)
Load Center Feeder - 22,000 A RMS Symmetrical Momentary (Load Breakers - Interrupting Centers 90 and 91)
Current
- 30,00 A RMS Symmetrical Interrupting (Load Centers 90 and 91)
- 50,000 A RMS Symmetrical (Load Center 200) 480 V Motor Control Centers 92, 93, 94, 95, 96, 97, 99 Horizontal Bus - 600 A Continuous, 42,000 A Symmetrical Vertical Bus - 300 A Continuous, 42,000 A Symmetrical Molded Case Breakers - - 14,000 A RMS Symmetrical
DSAR CHAPTER 8 - ELECTRICAL SYSTEMS TABLE 8-4 Revision 36 Page 4 of 4 480 VOLT SYSTEM RATINGS AND CONSTRUCTION OF COMPONENTS Interrupting Current
- 22,000 A RMS Symmetrical (Motor Control Center 99)
DSAR CHAPTER 8 - ELECTRICAL SYSTEMS TABLE 8-5 Revision 36 Page 1 of 1 DC AND PREFERRED AC SYSTEMS RATINGS AND CONSTRUCTION OF COMPONENTS Main Bus (D-10, D-20)
Horizontal Bus Continuous: 600 amps Short Circuit: 22,000 RMS symmetrical amps Vertical Bus Continuous: 300 amps Short Circuit: 22,000 RMS symmetrical amps Main Bus Breakers Minimum Interrupting Current of (D-10, D-20) 20,000 amps at 125 Vdc DC Panel Fuses w/Disconnects Minimum Interrupting Current of (D-11-1, D-11-2, D-21-1 20,000 amps at 125 Vdc D-21-2, D-11A, D-21A)
AC Panel Breakers Minimum Interrupting Current of (Y-10, Y-20, Y-30, Y-40) 10,000 RMS symmetrical amps at 120 Vac Battery Chargers 200 A Continuous Output (D-15, D-16, D-17, D-18)
Inverters 6 kVA Continuous Output (E-6, E-7, E-8, E-9)