Kohler KG125R-QS (125 kW) product details and specifications:

General 

• Model: KG125R 

• Fuel type: Multi-Fuel – LPG/Natural Gas 

• Voltage: 120/240 V, 1 Phase, 60 Hz 

• Standby rating, Natural Gas: 125 kW/125 kVA, 521 A 

• Standby rating, LP Gas: 105 kW/105 kVA, 438 A 

• Line circuit breaker: 600 A 

Alternator 

• Alternator model: 4T13X, 4 leads, 120/240 

• Type: 4-Pole, Rotating-Field, Brushless, Rare-Earth Permanent Magnet 

• Voltage regulator: Solid State, Volts/Hz, NEMA MG1 

• Insulation: Class H, 130°C standby temperature rise 

• Bearing: 1, sealed; coupling: flexible disc; amortisseur windings: full 

• Voltage regulation, no-load to full-load: ±0.5% 

• One-step load acceptance: 100% of rating 

• Unbalanced load capability: 100% of rated standby current 

• Sustained short-circuit current up to 300% of rated current for up to 10 seconds 

• Total harmonic distortion (THD): less than 3.2% no load to full load with linear load 

Engine 

• Manufacturer: Kohler 

• Engine model: KG6208THD, 6.2 L Turbocharged, Aftercooled 

• Cylinder arrangement: V-8 

• Displacement: 6.2 L (378 cu. in.) 

• Bore and stroke: 4.00 x 3.75 in. 

• Compression ratio: 9.8:1 

• Rated RPM: 1800 

• Max. power at rated RPM, Natural Gas: 152 kW (204 HP) 

• Max. power at rated RPM, LP Gas: 131 kW (175 HP) 

• Governor type: Electronic, isochronous 

• Frequency regulation, no-load to full-load: Isochronous 

• Frequency regulation, steady state: ±1.0% 

• Air cleaner type: Dry 

Exhaust System 

• Exhaust manifold type: Dry 

• Exhaust flow at rated kW: 1,024 cfm (29 m3/min.) 

• Exhaust temperature at rated kW, dry exhaust: 1,292°F (700°C) 

• Maximum allowable back pressure: 4.43 in. Hg (15 kPa) 

• Exhaust outlet size at engine hookup: 3.5 in. (88.9 mm) 

Engine Electrical 

• Ignition system: Coil pack 

• Battery charging alternator: 12 VDC, 130 A, negative ground 

• Starter motor rated voltage: 12 VDC 

• Recommended battery, cold cranking amps: One, 650 CCA at 0°F (-18°C) 

• Battery voltage: 12 VDC 

Fuel System 

• Fuel type: Natural Gas, LP Gas, or Dual Fuel 

• Fuel supply line inlet: 1.5 NPT 

• Fuel supply pressure: 7–11 in. H2O (1.74–2.74 kPa) 

• Natural gas fuel consumption at 100% load: 1,678 cfh (47.5 m3/hr.) 

• LP gas fuel consumption at 100% load: 664 cfh (18.8 m3/hr.) 

Lubrication 

• Type: Full pressure 

• Oil pan capacity: 6.0 qt. (5.7 L) 

• Oil pan capacity with filter and oil cooler: 9.5 qt. (9.0 L) 

• Oil filter: 1, cartridge type 

Cooling 

• Ambient temperature rating: 113°F (45°C) 

• Engine jacket water capacity: 1.93 gal. (7.3 L) 

• Radiator system capacity, including engine: 7.5 gal. (28.4 L) 

• Engine jacket water flow: 33.3 gpm (126 Lpm) 

• Heat rejected to cooling water at rated kW: 4,633 Btu/min. (81.4 kW) 

• Water pump type: Centrifugal 

• Fan diameter, including blades: 28 in. (711 mm) 

Controller 

• Kohler APM402 controller with advanced control, system monitoring, and diagnostics 

• Digital display and menu control for easy local data access 

• Measurements selectable in metric or English units 

• Remote communication via PC over network or serial configuration; supports Modbus protocol 

• Integrated hybrid voltage regulator with ±0.5% regulation 

• Built-in alternator thermal overload protection 

• NFPA 110 Level 2 capability 

Sound Enclosure 

• Sound level: 65 dB(A) during normal operation, measured at 23 ft. (7 m) 

• Acoustic insulation meets UL 94 HF1 flammability classification and repels moisture absorption 

• Vertical air inlet and outlet discharge with 90-degree bends to redirect air and reduce noise 

• Internal-mounted critical silencer and flexible exhaust connector 

• Skid-mounted, steel construction with hinged doors 

• Fade-, scratch-, and corrosion-resistant Kohler Cashmere Power Armor textured e-coat paint 

• Lockable, flush-mounted door latches 

Standard Features 

• Air cleaner restriction indicator 

• Alternator protection 

• Battery rack and cables 

• Battery charger, 12 V, 6 A 

• Block heater, 1500 W 

• cUL/UL 2200 listed, CSA certified 

• Electronic, isochronous governor 

• Engine fluids added (oil and coolant) 

• Flexible fuel line for fuel supply connection 

• Gas fuel system (fuel mixer, electronic secondary gas regulator, gas solenoid valve, flexible fuel line) 

• Integral vibration isolation 

• Line circuit breaker, 80% rated, 3 pole 

• Local emergency stop switch 

• Oil drain extension 

• Operation and installation literature 

• Rodent guards 

• Secondary gas solenoid valve 

• Steel sound enclosure 

• Three-way catalyst 

• 5-year/2000-hour basic warranty 

Certifications 

• EPA-certified to conform to New Source Performance Standard (NSPS) for stationary spark-ignited emissions 

• cUL/UL 2200 listed and CSA certified 

• Accepted by the Massachusetts Board of Registration of Plumbers and Gas Fitters 

• Meets NFPA 110, Level 2 when equipped with necessary accessories and installed per NFPA standards 

Dimensions and Weight 

• Overall size (L x W x H): 138.8 in. x 45.4 in. x 65.5 in. 

• Weight, wet, with steel sound enclosure: 3,562 lbs. 

product specifications:

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