Electrical System DesignElectrical System DesignForFor

Amazon.comAmazon.comThe Mid-South Annual Engineering and Sciences ConferenceThe Mid-South Annual Engineering and Sciences Conference

MAESC 2006MAESC 2006

ByBy

Phuc Linh Nguyen Phuc Linh Nguyen Liles Engineering Design ConsultantsLiles Engineering Design Consultants

March 31, 2005March 31, 2005

IntroductionIntroduction

Amazon.comAmazon.com opens a new customer opens a new customer service center in Kennewick, WA.service center in Kennewick, WA.

Electrical System DesignElectrical System Design Jim Liles at Liles Engineering Design Jim Liles at Liles Engineering Design

ConsultantsConsultants

Project ScopeProject Scope

To Provide Backup To Provide Backup Diesel GeneratorDiesel Generator

To Provide UPS SystemTo Provide UPS System To Provide load To Provide load

calculationscalculations To Perform Short-To Perform Short-

circuit calculationscircuit calculationsDiesel GeneratorUninterruptible Power Supply

Design SpecificationsDesign Specifications

Generator is rated at Generator is rated at 600 KW, 750 KVA600 KW, 750 KVA 480 V, three phase, 60Hz480 V, three phase, 60Hz

UPS is sized at 50 KVA UPS is sized at 50 KVA and 40 KW.and 40 KW. 480 VAC, 3-phase, 60Hz480 VAC, 3-phase, 60Hz

Design SpecificationsDesign Specifications

All Panels are sized All Panels are sized based on total Volt-based on total Volt-Ampere (VA) of Ampere (VA) of connected loads.connected loads.

All the loads are All the loads are summoned up summoned up throughout the entire throughout the entire systemsystem Electrical Panel

PanelsPanelsPanel ELA

 

Volts: 120/208V  

 

Phase: 3

Wire: 4W

Buzzing 225 225/3 Main CB

Loads A B C BKR Ck Ck BKR A B C Loads

Receptacles 900     20/1 1 2 20/1 800     Lights

    900     3 4     800   Mech VVT's

      900   5 6       900 Fan F2

  900       7 8   300     Liebert Rac 8

    900     9 10     360  

Roof Receptacles

      720   11 12       300Preaction

Sprink.

  720       13 14   600     Water HTR/Circ.

Total 11040 10140 8580         8000 8060 7500 Total

                       

                A: 19040

                B: 18200

                    C: 16080

Loads A BC

BKR Ck Ck BKR A B C Loads

AV

VA159

120

19040

CurrentVoltage

ereVoltageAmp

ResultsResults

PanelCurrent (Amps)

EHA 246

EHB 327

EHC 398

EHDP 123

EMSB 1369

ELA 159

ELB 194

ELC 173

System DiagramSystem DiagramUtility Power

2000Amp, 277/4803-phase,4W

Transformer

Fault #1

1600/31600A trip breaker

Transition Transfer Switch

600KW, 750KVA277/4803- phase, 4W

Diesel Generator

Fault #2 Fault #3

Fault #4

Fault #4

1600Amps, 277/480, 3-phase, 4W

ESMB

EHA EHB

400Amps277/480

3-phase, 4w

400Amps277/480

3-phase, 4w

EHC

400Amps277/480

3-phase, 4w

Fault #5a

Fault #5b

Fault #5c

Fault #5d

400Amps277/480

3-phase, 4w

75KVA

480 – 120/208V3-phase, 4W

75KVA

480 – 120/208V3-phase, 4W

75KVA

480 – 120/208V3-phase, 4W

Fault #6a

Fault #6b

Fault #6a

400/3 400/3 400/3 400/3

125/3 125/3 125/3

Fault #7a

Fault #7b

Fault #7c

Fault #8a

Fault #8b

EHDP

UPS

Watt-stopperRelay Panel

Watt-stopperRelay Panel

Watt-stopperRelay Panel

ELA

225Amps120/208

3-phase, 4W

ELA

225Amps120/208

3-phase, 4W

ELA

225Amps120/208

3-phase, 4W

Fault #7a

Fault #7b

Fault #7c

Fault #8a

Fault #8b

225/3225/3 225/3

Rectifier/Charger

Inverter

Battery CabinetStatic

BypassSwitch

Fault #9

Fault #8bFault

#8a

CLA

225Amps120/208

3-phase, 4W

70/3 70/3

45KVA

480 – 120/208V3-phase, 4W

225Amps, 277/480, 3-phase, 4W

45KVA

480 – 120/208V3-phase, 4W

CLA

225Amps120/208

3-phase, 4W

150/3 150/3

Fault #9

Fault #10a Fault #10b

Fault #11a Fault #11b

Interrupting RatingInterrupting Rating

Available Fault

Current

Available Fault

Current

Available Fault

Current

Protective Device

LoadNormal Current Operation

Short-Circuit Operationwith Inadequate

Interrupting Rating

Short-Circuit Operationwith adequate

Interrupting Rating

Short – Circuit CalculationsShort – Circuit Calculations

LL

SCA

VnC

ILf

**

3*

fM

1

1

IFLA = Rated CurrentP = Rated Power of TransformerVL-L = Secondary Line Voltage

ISCA = Short-Circuit Current%Z = Rated Impedance of TransformerZ

II FLASCA %

f = Constant FactorL = Length of Conduitn = Number of Conduit Per PhaseC = Conductor Constant

AV

KVA902

480*3

750

AA

044,2005.0*9.0

902

0129.0480*4*28033

3*044,20*20

LL

FLV

PI

*3

MIscacsymIs *.

987.00129.01

1

AA 783,19987.0*044,20 IS.CSYM = Short Circuit at a fault

ResultsResults      Number and Short-Circuit Length

  Type of Number of Size of wire and conduit Current of Wires

Fault # 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 1 4 - #1/0, 1 - #4(G), 1 - #4(IG), 2 1/2"C 1,932 16

ResultsResults

  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 CostElectrical CostElectric System Material Quotes Labor EQ&Tool Total

Labor Hr

Service & Distribution $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

Emergency Generation $10,225 $129,700 $8,568 $2,500 $150,993 168

Lighting protection $120 $13,880 $1,224 $1,500 $16,724 24

Reuse Existing CDT/Wire - $12000 $0 - $10,200   - $22,200 -200

Temp Pwr/LTG $55,000 $0 $7,650   $13,150 150

Mob/Demob/Permits $3,500 $2,272 $1,224   $6,996 24

Meggar Testing/start up     $3,825   $3,825 75

Second Shift Premium     $20,400   $20,400  

Overtime Premium     $5,100   $5,100  

             

Sub Total Prices $132,157 $492,757 $333,336 $19,800 $978,050 6036

             

Mark Up At 15% $19,823.55 $73,913.55 $50,000 $2,970 $146,707.50  

             

Totals $151,981 $566,671 $383,336 $22,770 $1,124,758 6036

ConclusionConclusion

Provides power distributionProvides power distribution Provides back up power supply Provides back up power supply Provides uninterruptible power to Provides uninterruptible power to

server roomserver room Provides adequate interrupting rating Provides adequate interrupting rating

for protective devicesfor protective devices

Questions?Questions?