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PAGE 24 — INDUSTRIAL GENERATOR SETS — APPLICATION & INSTALLATION MANUAL — REV. #4 (09/07/07)
GENSET SIZING — DETERMINING LOAD CHARACTERISTICS
Determining Load Characteristics (continued)
5. If reduced voltage motor starting is used, determine
SkVA as in Steps 1, 2, 3, or 4 on previous page, and
then multiply the value by the appropriate multiplying
factor in Table 5. Use the following formula:
Calculate SkW as follows:
1. If SPF (Starting Power Factor) is unknown, refer to Table
4 on page 22 and use the value corresponding to the
motor horsepower.
If a resistor-type reduced voltage
motor starting is used, use the value for SPF
in Table 6
below.
2. Multiply SkW by 0.5 for motors with low inertia loads
(i.e., centrifugal fans, compressors and pumps) where
starting torque requirements are low.
scitsiretcarahCdnasdohteMgnitratSegatloVdecudeR.6elbaT
dohteMgnitratS
lluF%
egatloV
deilppA
lluF%
AVkegatloV
lluF%
egatloV
euqroT
AVkS
gniylpitluM
rotcaF
FPS
egatloVlluF0010010010.1—
egatloVdecudeR
remrofsnartotuA
08
56
05
46
24
52
46
24
52
46.0
24.0
52.0
—
—
—
rotcaeRseireS
08
56
05
08
56
05
46
24
52
08.0
56.0
05.0
—
—
—
rotsiseRseireS
08
56
05
08
56
05
46
24
52
08.0
56.0
05.0
06.0
07.0
08.0
atleDratS001333333.0—
)lacipyT(gnidniWtraP00106846.0—
rotoMrotoRdnuoW001*061*001*6.1—
ehtfoeulavehtnodnepedhcihw,tnerrucgninnurfosrotcafrostnecreperaesehT—*
.sgnidniwrotorehtotdeddasecnatsiserseires