13-834R-024N
May 11, 2011
Mr. Juan Cardona
CGRD Partners
2121 Ponce de Leon Blvd.
Suite 350
Coral Gables, Florida, 33134
Re $ymmetrical Fault C1111'reht for FPL
Facilities
Dear Mr,Cqrdoqa:
FloddA , ovmr -,*, Light Cqippany, ROM FL 41M11110100
You recently requested symmetrical fault current inf.ofmation at the FPi . facilities at several
locations on the main campus of South Miami Hospital. As such, the inforMation it as follows:
2-1500 kl,/A transformers in paralial, with a so,.canclary voltage; of 27-114$0 V in the main vault. The
syr-nnlelrjcal fault C'U'Rent at this facility is 54,000 Amps, This is calculated tivith an actual
i . rnpedance of 4-S% on each of the This assumes an infinite bus at the vault.
The '1500 kVA transformer in the same vault has a symmetrical fault current of 31,000 Amps at
277/480 V. Thin :also ..,ossUmes an infinite .bus at the transformer with an actual irnpedance of 4,9%,
The 1000 WA, transformer in the North Tower vault has a SyrilinFtf.k.81 fRL!lt current of 22,000
Amps. Thes.ame assumptions apply with an actual impedance rating of 4,89%
The 600. WA transformer in the mast Tower vault has a symmetrical fault current of 27,75-7
symmetrical aroperes at 1201208 V,
The F.P.L equipment. WrrenflY Sf,'Ninq Or planned to serve your facility may change over time as a
result of arty number of factors, including but not lirnited to tmnsforrner replacements due to load
grOviffi, electrical grid changet or ornergencies. As a result, although we are providing you with
this information for the sole piJapose of assisting you in the cornp)etion of your study, you should
not clesign, install or operate your oysters in refiarjue upon any expectation that the specific size
and, type of equipimn.t.cLi.fren.fly in place will rernain so. If and when the size and type of the
eqUiPrillent changes, ow employees are not always in -a position to immediately n fify custmi fs.
This calculated syrnmetricai fault current is not Intended for use a* the basis for motor starting
calculations and clues not include for any rooter contribution or fault: current
asymmetry,
ANYONE USING OR RELYING ON THIS INFORMATION DOES SO AT THEIR. OWN RISK, AND
FLORIOA POWER & L.101-1-Y COMPANY DISQLAWS ANY LIABILITY FOR EITHER
INIK'LIGENCE OR WARRANTY ARISING THER ".ROX
If you have any questions or concerns pleas- call rn-, at (3051 aa2 - ?aCty',
"P -V
He0o JI�ae-,Wij. f1:EA4,
Major Account. Wlnager
an FPL Group C"zInpmly
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REVISIONS
MARK: REMARKS:
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FAULT
CURRENT
LETTER
Job No:
412474.00
Date:
File:
Sheet Title:
Sheet No:
E6,03
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4F Yp
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FAULT
CURRENT
LETTER
Job No:
412474.00
Date:
File:
Sheet Title:
Sheet No:
E6,03