Deration – Operational characteristics consider maximum ambient conditions. Derate factors may apply under atypical site conditions. Please consult a Generac Power Systems Industrial
Dealer for additional details. All performance ratings in accordance with ISO3046, BS5514, ISO8528 and DIN6271 standards.
POWER RATINGS (kW)
STARTING CAPABILITIES (sKVA)
FUEL
COOLING
COMBUSTION AIR REQUIREMENTS
ENGINE
EXHAUST
STANDBY
PRIME
Single-Phase 120/240VAC @1.0pf
275 kW
Amps: 1146
248 kW
Amps: 1031
Three-Phase 120/208VAC @0.8pf
275 kW
Amps: 954
248 kW
Amps: 859
Three-Phase 120/240VAC @0.8pf
275 kW
Amps: 827
248 kW
Amps: 744
Three-Phase 277/480VAC @0.8pf
275 kW
Amps: 413
248 kW
Amps: 372
Three-Phase 346/600VAC @0.8pf
275 kW
Amps: 331
248 kW
Amps: 298
sKVA vs. Voltage Dip
480VAC
208/240VAC
Alternator
kW
10%
15%
20%
25%
30%
35%
10%
15%
20%
25%
30%
35%
Standard
300
303
454
605
757
908
1059
227
341
454
568
681
794
Upsize 1
350
383
575
767
958
1150
1342
280
410
535
640
770
900
Upsize 2
400
387
581
775
968
1162
1356
345
570
835
1100
1450
1710
Fuel Consumption Rates*
STANDBY
PRIME
Fuel Pump Lift - in (mm)
Percent Load
gph
lph
Percent Load
gph
lph
36 (900)
25%
6.8
25.7
25%
6.2
23.5
50%
11.7
44.2
50%
10.5
39.7
Total Fuel Pump Flow (Comb Return)
75%
15.8
59.8
75%
14.6
55.2
31 gph
100%
19.6
74.2
100%
17.8
67.4
* Refer to "Emissions Data Sheet" for maximum fuel flow for EPA and SCAQMD permitting purposes.
STANDBY
PRIME
Coolant Flow per Minute
gpm (lpm)
95 (360)
95 (360)
Heat Rejection to Coolant
BTU/hr
722,612
656,250
Inlet Air
cfm (m3/min)
14,505 (411)
14,505 (411)
Max. Operating Radiator Air Temp
Fº (Cº)
122 (50)
122 (50)
Max. Operating Ambient Temperature
Fº (Cº)
104 (40)
104 (40)
Coolant System Capacity
gal (L)
16.6 (63)
16.6 (63)
Maximum Radiator Backpressure
in H
2
O
1.5
1.5
STANDBY
PRIME
Flow at Rated Power
cfm (m3/min)
780 (22.09)
702 (19.88)
STANDBY
PRIME
Rated Engine Speed
rpm
1800
1800
Horsepower at Rated kW**
hp
449
396
Piston Speed
ft/min
1654
1654
BMEP
psi
308
277
** Refer to “Emissions Data Sheet” for maximum bHP for EPA and SCAQMD permitting purposes.
STANDBY
PRIME
Exhaust Flow (Rated Output)
cfm (m
3
/min) 2050 (58.1)
1845 (52.3)
Max. Backpressure (Post Silencer)
inHg (Kpa)
1.5 (5.1)
1.5 (5.1)
Exhaust Temp (Rated Output)
ºF (ºC)
950 (510)
855 (457)
Exhaust Outlet Size (Open Set)
NPT (male)
101.6 (4)
101.6 (4)
3 of 5
SD275
operating data (60Hz)
275 kW Diesel
