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INDUSTRIAL GENERATOR SETS — APPLICATION & INSTALLATION MANUAL — REV. #4 (09/07/07) — PAGE 19
GENSET SIZING
Figure 1. Genset Sizing Worksheets
(Example Two-Step Loading Application)
NOTES:
a. For the two 100 HP motors, SkVA = HP x NEMA Code Letter Multiplier (Table 6) = 100 x 5.9 x 0.64 = 377.6
b. SkW = SkVA x SPF = 377.6 x 0.3 =113.3
c. RkW = HP x 0.746 / 0.91 = 81.9
d. RkVA = RkW / RPF = 81.9 / 0.92 = 89
e. A GkW total will need to be found because Load #2 is a nonlinear load. Therefore, enter values for GkW for the linear loads. GkW= RkW for
linear loads.
f. These values are twice the values in the
individual load characteristics
columns because QTY is 2 for Load #1.
g. For the fluorescent lighting, RkW = SkW. SPF and RPF both = 0.95
h. For the 100 HP VFD motor: GkW = RkW x generator sizing factor = 81.9 x 2.0 = 163.8; SkW = RkW; and SkVA = RkVA.
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