Phasor K4-30.0 – 30kW Diesel Marine Generator 60Hz 1800 RPM

The Phasor K4-30.0 is a low-speed 60Hz marine diesel generator for vessels requiring up to 30 kW of continuous AC power. It uses a Kubota V3300-E4BG four-cylinder diesel engine operating at 1,800 RPM and a direct-coupled brushless generator with solid-state voltage regulation. The standard model supplies 120/240V single-phase AC output; confirm the exact alternator option if a three-phase configuration is required.

This open-frame generator uses freshwater cooling through a heat exchanger and a raw-water circuit. A sound enclosure may be available separately. The generator requires a complete marine installation including diesel fuel supply and return, seawater intake, exhaust system, ventilation, starting battery, AC distribution, shore-power transfer equipment, grounding, and correctly sized protection devices.

Key Specifications

- Low-speed marine diesel generator for 60Hz AC power systems.
- Provides 30 kW continuous output at 1,800 RPM.
- Uses a Kubota V3300-E4BG four-cylinder diesel engine with 202.48 cubic inches, or 3,318 cc, displacement.
- Provides 120/240V single-phase output with a listed capacity of 250A at 120V or 125A at 240V.
- Uses a direct-coupled brushless generator with solid-state voltage regulation.
- Uses freshwater heat-exchanger cooling with raw-water impeller circulation.
- Measures approximately 1,346 mm by 610 mm by 813 mm and weighs approximately 521 kg in base configuration.
- Includes a remote instrument panel, low-oil-pressure shutdown, high-coolant-temperature shutdown, and overspeed protection.

Electrical Compatibility

This model is intended for 120/240V, 60Hz single-phase electrical systems. Confirm the exact output voltage, phase, and alternator configuration before ordering; a three-phase option, if available, must be specified separately. Generator selection should account for continuous load, simultaneous demand, power factor, and the largest motor-starting surge.

Do not size the generator from nominal appliance wattage alone. Include battery chargers, HVAC equipment, refrigeration compressors, pumps, watermakers, galley appliances, inductive loads, and expected future electrical demand in the load calculation.

Installation Considerations

Install the generator on a rigid vibration-isolated foundation designed for approximately 521 kg, with access for oil, filters, belts, coolant, raw-water pump, electrical terminals, and exhaust service. Provide diesel feed and return plumbing, seawater intake and strainer, a wet-exhaust system, ventilation, start-battery circuit, AC breaker panel, grounding and bonding, and a shore-power transfer switch or interlock that prevents simultaneous shore and generator power connection. Installation and commissioning should be completed by a qualified marine generator technician.

Before Ordering

Confirm required continuous and surge load within 30 kW, 120/240V single-phase 60Hz compatibility, exact alternator and phase configuration, available installation space, structural support for approximately 521 kg, diesel fuel-system layout, raw-water intake, exhaust route, ventilation capacity, starting-battery circuit, AC distribution and transfer-switch design, grounding plan, sound-enclosure requirement, service access, and qualified marine-generator installation requirements before purchase.