Spec Sheet
G4-290 (KG125R) 9/21d
Generator Set Ratings
Natural Gas LP Gas
130C Rise 130C Rise
Standby Rating Standby Rating
Alternator Voltage Ph Hz kW/kVA Amps kW/kVA Amps
4R12X
120/208 3 60 120/150 417 105/131 364
127/220 3 60 125/156 410 105/131 344
120/240 3 60 120/150 361 105/131 316
120/240 1 60 91/91 380 91/91 380
139/240 3 60 125/156 376 105/131 316
220/380 3 60 110/138 210 105/131 200
277/480 3 60 125/156 188 105/131 158
4R13X
120/208 3 60 125/156 434 105/131 364
127/220 3 60 125/156 410 105/131 344
120/240 3 60 125/156 376 105/131 316
120/240 1 60 105/105 438 100/100 417
139/240 3 60 125/156 376 105/131 316
220/380 3 60 120/150 228 105/131 200
277/480 3 60 125/156 188 105/131 158
4T13X 120/240 1 60 125/125 521 105/105 438
RATINGS: All three-phase units are rated at 0.8 power factor. All single-phase units are rated at 1.0 power factor. Standby Ratings: The standby rating is applicable to varying loads for the duration of a
power outage. There is no overload capability for this rating. Ratings are in accordance with ISO-8528-1 and ISO-3046-1. For limited running time and continuous ratings, consult the factory. Obtain technical
information bulletin (TIB-101) for ratings guidelines, complete ratings definitions, and site condition derates. The generator set manufacturer reserves the right to change the design or specifications without
notice and without any obligation or liability whatsoever. For dual fuel engines, use the natural gas ratings for both the primary and secondary fuels.
EPA-Certified for Stationary
Emergency Applications
Ratings Range
60 Hz
Standby: kW 91- 125
kVA 91- 156
Standard Features
Kohler Co. provides one-source responsibility for the
generating system and accessories.
The generator set and its components are prototype-tested,
factory-built, and production-tested.
The 60 Hz generator set offers a UL 2200 listing.
CSA approval is available.
The 60 Hz generator set meets NFPA 110, Level 1, when
equipped with the necessary accessories and installed per
NFPA standards.
The generator set accepts rated load in one step.
A one-year limited warranty covers all generator set systems
and components. Two- and five-year extended limited
warranties are also available.
Alternator features:
The unique Fast-Response X excitation system delivers
excellent voltage response and short-circuit capability
using a rare-earth, permanent magnet (PM)-excited
alternator.
The brushless, rotating-field alternator has broadrange
reconnectability.
Other features:
Kohler
APM402 controller. See controller features on
page 3.
The electronic, isochronous governor incorporates an
integrated drive- by- wire throttle body actuator delivering
precise frequency regulation.
Quick- ship (QS) models with selected features and a
five- year basic limited warranty are available. See your
Kohler distributor for details.
Model:
KG125R
208- 480 V Gas