The engine is rarely why a Weichai diesel generator fails its site acceptance test. In most of the failure reports we review, the cause is one of three specification errors: the l...
READ MOREProduct Advantages
Durability:
The 30KW Dongfeng Cummins generator set is equipped with a highly reliable Type B engine. The generator set features a compact and well-organized structure, small size, and light weight, yet maintains high structural strength. It delivers stable performance even under long-term operating conditions. When maintenance guidelines are strictly followed, the average time between failures can reach 1,500 hours, and the average major overhaul interval can reach 6,000 hours or more. The generator set demonstrates excellent durability, long service life, and strong stability, maintaining reliable operation even under extreme duty-cycle testing conditions.
Excellent Performance:
With an efficient combustion system and optimized power structure, the generator set achieves high power output per unit and high power density. Even small-capacity models deliver strong performance. During operation, it provides stable output, rapid power response, and strong load adaptability, ensuring excellent continuous operation and transient load handling. Additionally, it offers cleaner, quieter, and more fuel-efficient performance, with high combustion efficiency, low fuel consumption, and low operational noise, meeting the needs of multiple power applications.
High Reliability:
The Type B engine is designed to world-class reliability standards. The generator set features excellent system matching, highly stable core components, and scientifically optimized structural design, resulting in a low system failure rate. Even under frequent start-stop cycles, continuous operation, and complex working conditions, it maintains stable operation, fully demonstrating its world-class reliability and ensuring a long-term stable power supply.
Easy Maintenance:
The compact design provides a well-organized layout with ample space for inspection and maintenance. Key components are highly reliable, reducing maintenance frequency. High parts interchangeability, low maintenance costs, and efficient service operations significantly lower maintenance expenses and downtime during long-term use.
Technical Parameters
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Unit power |
30 KW |
Engine |
Dongfeng Cummins 4BT3.9-G2 |
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Generator |
Yangzhou Kangcheng KC30-4 |
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Engine: 4BT3.9-G2 |
Generator: single bearing, protection rating IP22, insulation class H |
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Radiator rated for 40°C ambient temperature, cooling fan with safety guard, air filter, fuel filter, and oil filter |
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Common steel base frame, vibration isolators, standard control panel |
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24V charging alternator, industrial-grade silencer (muffler) and standard connecting fittings |
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Maintenance-free lead-acid battery and battery connecting cables |
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Voltage level |
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Voltage V |
Frequency Hz |
Number of phases |
Rated current A |
Power KW |
Power factor |
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400/230 |
50 |
3 |
54 |
30 |
0.8 |
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Engine parameters |
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Manufacturer/Model |
Dongfeng Cummins/4BT3.9-G2 |
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Intake system |
Boost |
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Fuel system |
North Oil A Pump/Electronic Speed Regulator |
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Number of cylinders/arrangement |
4-cylinder/inline |
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Displacement |
3.9 L |
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Compression ratio |
18:1 |
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Cylinder bore * stroke |
102*120 mm |
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Rated speed |
1500rpm |
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Engine power (main/spare) |
36KW/40KW |
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Speed control system |
Electronic speed control |
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Fuel system |
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100% backup power |
212 g/kw.h |
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Basic output power 25% |
312 g/kw.h |
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Basic output power 50% |
244 g/kw.h |
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Basic output power 75% |
223 g/kw.h |
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Basic output power 100% |
214 g/kw.h |
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Lubrication system |
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Lubricating oil capacity |
10.9 L |
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Cooling system |
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Coolant capacity |
7.2 L |
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Generator parameters |
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Number of phases |
3 |
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Wiring method |
Three-phase four-wire, Y-type interconnection |
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Number of bearings |
1 |
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Power factor |
0.8 |
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Protection level |
IP22 |
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Altitude requirements |
≤1000m |
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Excitation system |
Brushless self-excited magnet |
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Insulation class/temperature rise class |
H/H |
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Telephone Influence Factor (TIF) |
<50 |
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Telephone harmonic coefficient THF |
<2% |
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Unit performance parameters |
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Voltage setting range |
≥±5% |
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Steady-state voltage regulation |
≤±1% |
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Transient voltage deviation (100% sudden power reduction) |
≤+25% |
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Transient voltage deviation (sudden power increase) |
≤-20% |
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Voltage recovery time (100% sudden power reduction) |
≤6S |
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Voltage recovery time (sudden power increase) |
≤6S |
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Frequency setting range |
0-5% |
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Steady-state frequency band |
≤1.5% |
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Transient frequency deviation (100% sudden power reduction) |
≤+12% |
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Transient frequency deviation (sudden power increase) |
≤-10% |
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Frequency recovery time (100% power drop) |
≤5S |
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Frequency recovery time (sudden power increase) |
≤5S |
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Unit weight |
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Unit size |
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