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keno GOMM Eieeno Ccii y
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MEMORANDUM .
04/17/07 •.°..'-
g ; TO: CONTACT: Estes Repair Service -scent Estes 4
r rt PHONE 503. 349 -1258 ` ^ 1
'' CUSTOMER NAME: HL Property Manq. /Greenway Town Center .
i ADDRESS: 12190 SW Scholl Ferry. Portland tWeStl QR 97223 ia ■ K
•, • FROM: PGE ENGR: Ken Gutierrez , Nm 7 . •
y. ,,, _ 503 - 570.4412 Mr
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� • SU BJECT: 3 -PHASE SECONDARY LINE -LINE FAULT CURRENT IRMSI Ti
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nm TRANSFORMER DATA _
XFMR Impedance (%): 1.4 % RADIAL NE1WORK f,-'
TRANSFORMER SIZE: 500 KVA XFMR? NO � .; ,
5 Secondary VOLTAGE (L to L): 208 v WYE -- ' or
S:
i f VAULT -a VAULT ( or Pole --> Pole SECONDARY �'
n
i Secondary Wire LENGTH: 0 Feet WIRE SIZE ',
Number of SECONDARY RUNS: 1 Run(a) of:
Secondary WIRE Resistance R: 0.0773 Ohms11000' a
h Secondary WIRE Reactance X: 0.0258 Ohm s /1007
I . -. _T or Pole - -> R.I. , L SECONDARY or Svc Dro . tit
Nit
51.1.1 Service Wire LENGTH: 150 Feet WIRE SIZE 'a1 s t ' .,
4 ' I { Number of Service RUNS: 4 Run(s) of: 410 AL XLP 4
!? Service WIRE Resistance R: 0.1000 Ohms11000' '
44 1 Service WIRE Reactance X: 0.0580 Ohmst1000
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m : FAULT CUR RENT: 18 751 Arn r
v " r (or S $ORr CIRCUIT CURRENT)
:; (Of INTERRUPTING CURRENT) : FU
Based on a panel stye of: 1000 Amps "M
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NiVorld tide Cu cu Pi otetion Solutions
Short;_. Circuit::Calcu at ion Results'
6/7/2007
11:23 AM
Three Phase System
Fault at the End of a Run of Cable
Three: single conductors
Copper Conductor
Magnetic Conduit
Wire Size 3/0
30 ft Length of Run
1 Conductors Per Phase
18751 amp Line -to -Line Short Circuit Current at Beginning of
Run
208 V Line -to -Line Voltage
Three Phase Line -to -Line Short Circuit Current = 13739.779 AMPS
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