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Kohler 300RZX Generator Set

The Kohler 300RZX is a 300 kW (375 kVA) natural gas / LP standby generator set powered by a Power Solutions International D183L engine. It is available at 480 V, 3-phase, 60 Hz and rated 1041 A. It holds about 35 L (9.2 gal) of oil and 177 L (46.8 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 2 group-Two batteries rated 925 CCA at 24 V.

300 kW
Standby
18.273 L
Displacement
35.0 L
Oil capacity
4
Document types

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Specifications

Fuelnatural gas / LP
Frequency60.0 Hz
Standby power300 kW
Standby kVA375
Prime power270 kW
ControllerAPM603
Oil capacity35.0 L
AlternatorFast-Response PMG (Class Class H insulation)
Voltage options480 V
Phase3-phase
Rated current1041 A
Power factor0.8
Battery groupTwo
Battery cranking925 CCA
Battery voltage24 V
Battery quantity2
Coolant capacity177.0 L
Engine jacket water42.0 L
Max ambient50 °C

Engine

Power Solutions International D183L
Oil capacity35.0 L
Coolant capacity42.0 L
Displacement18.273 L
AspirationTurbocharged, Charge Air-Cooled
Rated speed1800 rpm

Maintenance & consumables

for the Power Solutions International D183L
ItemSpecCapacityPart #Interval
Air filterDry—
Fuel filter—
Oil filter×2—93 hr
BatteryTwo, 925 CCA—
Belt—24 hr
Coolant—
OilKohler Genuine oil and filters—

Service specifications

30
TypeItemValueUnitCondition
Other10 in. weld flange bolt circle diameter B361.95mm (14.25 in.)
Other10 in. weld flange outside diameter C406.4mm (16.0 in.)
Other10 in. weld flange quantity of bolts / bolt hole diameter D12, 25.40mm (1.00 in.)
Other12 in. weld flange bolt circle diameter B431.80mm (17.00 in.)
Other12 in. weld flange outside diameter C482.6mm (19.0 in.)
Other12 in. weld flange quantity of bolts / bolt hole diameter D12, 25.40mm (1.00 in.)
Other14 in. weld flange bolt circle diameter B476.25mm (18.75 in.)
Other14 in. weld flange outside diameter C533.4mm (21.0 in.)
Other14 in. weld flange quantity of bolts / bolt hole diameter D12, 28.58mm (1.13 in.)
Other16 in. weld flange bolt circle diameter B539.75mm (21.25 in.)
Other16 in. weld flange outside diameter C596.9mm (23.5 in.)
Other16 in. weld flange quantity of bolts / bolt hole diameter D16, 28.58mm (1.13 in.)
Other18 in. weld flange bolt circle diameter B577.85mm (22.75 in.)
Other18 in. weld flange outside diameter C635.0mm (25.0 in.)
Other18 in. weld flange quantity of bolts / bolt hole diameter D16, 31.75mm (1.25 in.)
Other20 in. weld flange bolt circle diameter B635.00mm (25.00 in.)
Other20 in. weld flange outside diameter C698.5mm (27.5 in.)
Other20 in. weld flange quantity of bolts / bolt hole diameter D20, 31.75mm (1.25 in.)
Other5 in. weld flange bolt circle diameter B215.90mm (8.50 in.)
Other5 in. weld flange outside diameter C241.30mm (9.50 in.)
Other5 in. weld flange quantity of bolts / bolt hole diameter D8, 22.23mm (0.88 in.)
Other6 in. weld flange bolt circle diameter B254.0mm (10.0 in.)
Other6 in. weld flange outside diameter C279.4mm (11.0 in.)
Other6 in. weld flange quantity of bolts / bolt hole diameter D8, 22.23mm (0.88 in.)
Other8 in. weld flange bolt circle diameter B298.45mm (11.75 in.)
Other8 in. weld flange outside diameter C342.9mm (13.5 in.)
Other8 in. weld flange quantity of bolts / bolt hole diameter D8, 22.23mm (0.88 in.)
OtherWeld flange angle A (10, 12, 14 in. nominal pipe size)30deg.
OtherWeld flange angle A (16, 18, 20 in. nominal pipe size)22.5deg.
OtherWeld flange angle A (5, 6, 8 in. nominal pipe size)45deg.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Voltage reconnection

VoltagePhaseConnectionLeadsNotes
12-lead optional voltage connections12Alternator optional feature
4-lead dedicated voltages4Alternator standard feature
110/127/139/240/254/277single-phaseswitchableTowable generator model specifications; some models n/a
208/220/240/415/440/4803-phasereconnectableTowable generator model specifications
208/220/240/415/440/4803-phaseswitchableTowable generator model specifications

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

How many kW is the Kohler 300RZX?

The Kohler 300RZX is rated 300 kW standby (375.0 kVA).

What engine does the Kohler 300RZX use?

The Kohler 300RZX is powered by the Power Solutions International D183L engine.

What fuel does the Kohler 300RZX use?

The Kohler 300RZX runs on natural gas / LP.

What's the oil capacity on a Kohler 300RZX?

The Power Solutions International D183L engine in the Kohler 300RZX has an oil capacity of 35.0 liters.

What is the coolant capacity of the Kohler 300RZX?

The Kohler 300RZX cooling system holds 177 liters (46.8 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the continuous rating of the Kohler 300RZX?

The Kohler 300RZX is rated 270 kW prime (338 kVA), against 300 kW standby.

What voltages is the Kohler 300RZX available in?

The Kohler 300RZX is offered in 480 V, 3-phase-phase.

What size battery does the Kohler 300RZX need?

The Kohler 300RZX uses 2 batteryies, 24 V each, 925 CCA, group Two, per the manufacturer specification sheet.

Which alternator is fitted to the Kohler 300RZX?

The Kohler 300RZX uses a Fast-Response PMG alternator. Insulation class Class H.

Available documents

Spec sheet — g4300 (Kohler)Reference (Kohler)Reference — 180-450REZX G6109 (Kohler)Reference — 300-500REZX G6178 (Kohler)Reference — G6-39 0918AZ (Kohler)Reference — Katalog-promyshlennoj-produktsii (Kohler)Reference — Kohler-Gas Generators Brochure (Kohler)Parts manual — tp6706 (Kohler)Service manual — TP-6832 1218G (Kohler)

This page was generated from the 9 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.