Transcript Slide 1
Electrical System Design For Amazon.com The Mid-South Annual Engineering and Sciences Conference MAESC 2006 By Phuc Linh Nguyen Liles Engineering Design Consultants March 31, 2005 Introduction Amazon.com opens a new customer service center in Kennewick, WA. Electrical System Design Jim Liles at Liles Engineering Design Consultants Project Scope To Provide Backup Diesel Generator To Provide UPS System To Provide load calculations To Perform Short-circuit calculations Uninterruptible Diesel Generator Power Supply Design Specifications Generator is rated at 600 KW, 750 KVA 480 V, three phase, 60Hz UPS is sized at 50 KVA and 40 KW. 480 VAC, 3-phase, 60Hz Design Specifications All Panels are sized based on total Volt-Ampere (VA) of connected loads. All the loads are summoned up throughout the entire system Electrical Panel Panels Panel ELA Volts: 120/208V Phase: 3 Wire: 4W Buzzing 225 Loads Receptacles 225/3 Main CB A B C 900 900 900 900 BKR Ck Ck BKR A 20/1 1 2 20/1 800 3 4 5 6 7 8 B C Loads Lights 800 Mech VVT's 900 300 Fan F2 Liebert Rac 8 Roof 900 720 720 9 10 11 12 13 14 Receptacle s 360 300 600 Preaction Sprink. Water HTR/Circ. Loads A Total 11040 B 10140 C BKR Ck Ck BKR 8580 A 8000 VoltageAm pere Current Voltage 19040 VA 159 A 120V B 8060 C Loads 7500 Total A: 19040 B: 18200 C: 16080 Results Panel Current (Amps) EHA 246 EHB 327 EHC 398 EHDP 123 EMSB 1369 ELA 159 ELB 194 ELC 173 System Diagram Diesel Generator Utility Power Transformer 600KW, 750KVA 277/480 3- phase, 4W Fault #1 2000Amp, 277/480 3-phase,4W Fault #2 Fault #3 1600/3 1600A trip breaker Transition Transfer Switch Fault #4 Fault #4 1600Amps, 277/480, 3-phase, 4W 400/3 400/3 400/3 400/3 ESMB Fault #5a 400Amps 277/480 3-phase, 4w Fault #5b 400Amps 277/480 3-phase, 4w EHA 125/3 Fault #6a 75KVA 480 – 120/208V 3-phase, 4W Fault #5c 400Amps 277/480 3-phase, 4w EHB 125/3 Fault #6b 75KVA 480 – 120/208V 3-phase, 4W Fault #5d 400Amps 277/480 3-phase, 4w EHC 125/3 EHDP Fault #6a 75KVA 480 – 120/208V 3-phase, 4W UPS Fault #8a Fault #7a Fault #7b Fault #7c Fault #8b Watt-stopper Relay Panel Watt-stopper Relay Panel Watt-stopper Relay Panel 225/3 Fault #7a 225/3 225/3 Fault #7b Fault #7c 225Amps 120/208 3-phase, 4W 225Amps 120/208 3-phase, 4W 225Amps 120/208 3-phase, 4W ELA ELA ELA Fault #8a Fault #8b Fault #8b Fault #8a Rectifier/ Charger Static Bypass Switch Battery Cabinet Inverter Fault #9 Fault #9 225Amps, 277/480, 3-phase, 4W 70/3 70/3 Fault #10a Fault #10b 45KVA 480 – 120/208V 3-phase, 4W 150/3 Fault #11a 45KVA 480 – 120/208V 3-phase, 4W Fault #11b 150/3 225Amps 120/208 3-phase, 4W 225Amps 120/208 3-phase, 4W CLA CLA Interrupting Rating Protective Device Normal Current Operation Short-Circuit Operation with Inadequate Interrupting Rating Short-Circuit Operation with adequate Interrupting Rating Load Available Fault Current Available Fault Current Available Fault Current Short – Circuit Calculations I FL I SCA P 3 * VL L I FLA %Z L * I SCA 3 f C * n *VL L IFLA = Rated Current P = Rated Power of Transformer VL-L = Secondary Line Voltage ISCA = Short-Circuit Current %Z = Rated Impedance of Transformer f L n C = Constant Factor = Length of Conduit = Number of Conduit Per Phase = Conductor Constant 3 * 480V 902A 902 A 20,044 A 0.9 * 0.05 20 * 20,044* 3 0.0129 28033* 4 * 480 1 0.987 1 0.0129 1 M 1 f Is.csym Isca * M 750KVA IS.CSYM = Short Circuit at a fault 20,044A * 0.987 19,783A Results Number and Short-Circuit Length Type of Number of Size of wire and conduit Current of Wires Conduit Parallel Runs (AWG or kcmil) (Amps) (feet) 1 Non-Magnetic 4 4 - 600MCM, 4"C 19,783 20 2 Steel 4 4 - 600MCM, 4"C 19,625 10 3 Steel 4 4 - 600MCM, 1 - #4/0(G), 4"C 19,331 20 4 Steel 4 4 - 600MCM, 1 - #4/0(G), 4"C 18,906 30 5a Steel 2 4 - #3/0, 1 - #1/0(G), 2 1/2"C 17,507 30 5b Steel 2 4 - 250MCM, 1 - #2(G), 2 1/2"C 10,669 373 5c Steel 2 4 - 350MCM, 1 - #1(G), 3"C 13,536 229 5d Steel 1 3 - 350MCM, 1 - #4(G), 3"C 15,701 59 6a Steel 1 3 - 3, 1 - #6(G), 1 1/4"C 14,706 22 6b Steel 1 3 - 3, 1 - #6(G), 1 1/4"C 9,559 22 6c Steel 1 3 - 3, 1 - #6(G), 1 1/4"C 11,803 22 7a Steel 1 4 - #4/0, #2(G), 2 1/2"C 3,563 25 7b Steel 1 4 - #4/0, #2(G), 2 1/2"C 3,397 25 7c Steel 1 4 - #4/0, #2(G), 2 1/2"C 3,486 25 8a Steel 1 3 - #3, 1 - #6(G), 1 1/4"C 11,996 26 8b Steel 1 3 - #3, 1 - #6(G), 1 1/4"C 11,996 26 9 Steel 1 3 - #3, 1 - #6(G), 1 1/4"C 6,705 26 10a Steel 1 3 - #4, 1 - #8(G), 1"C 6,909 44 10b Steel 1 3 - #4, 1 - #8(G), 1"C 7,094 40 11a Steel 1 4 - #1/0, 1 - #4(G), 1 - #4(IG), 2 1/2"C 1,929 16 11b Steel 4 - #1/0, 1 - #4(G), 1 - #4(IG), 2 1/2"C 1,932 16 Fault # 1 Results Ampere Interrupting Capacity (AIC) 1600A trip breaker 50,000 Transition switch 50,000 Panel EHA 35,000 Panel EHB 35,000 Panel EHC 35,000 Panel EHDP 35,000 Panel EMSB 50,000 Panel ELA 10,000 Panel ELB 10,000 Panel ELC 10,000 Panel CHDP 25,000 Panel CLA 10,000 Panel CLB 10,000 Electrical Cost Electric System Service & Distribution Material Quotes Labor EQ&Tool Total Labor Hr $24,540 $38,165 $27,795 $1,500 $92,000 546 Lighting and Control $7,795 $286,444 $45,390 $4,000 $343,629 890 Devices $3,115 0 $12,240 $2,500 $17,855 240 Branch Lighting $15,100 0 $48,093 $2,800 $65,993 943 Branch Power $25,755 0 $68,697 $1,500 $95,952 1347 Feeders $38,150 0 $23,868 $1,500 $63,518 468 Basic Materials/Misc $5,212 0 $31,875 $1,000 $38,087 625 Fire Alarm 5145% $22,296 $37,587 $1,000 $66,028 737 $10,225 $129,700 $8,568 $2,500 $150,993 168 $120 $13,880 $1,224 $1,500 $16,724 24 - $12000 $0 - $10,200 - $22,200 -200 $55,000 $0 $7,650 $13,150 150 $3,500 $2,272 $1,224 $6,996 24 $3,825 $3,825 75 $20,400 $20,400 $5,100 $5,100 Emergency Generation Lighting protection Reuse Existing CDT/Wire Temp Pwr/LTG Mob/Demob/Permits Meggar Testing/start up Second Shift Premium Overtime Premium Sub Total Prices $132,157 $492,757 $333,336 $19,800 $978,050 Mark Up At 15% $19,823.55 $73,913.55 $50,000 $2,970 $146,707.50 $151,981 $566,671 $383,336 $22,770 $1,124,758 Totals 6036 6036 Conclusion Provides power distribution Provides back up power supply Provides uninterruptible power to server room Provides adequate interrupting rating for protective devices Questions?