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 MOREHigh Reliability
High-quality alloy cast iron cylinder block and cylinder head ensure excellent reliability.
Superior cold-start performance with dual-reduction starter and electronic fuel injection technology for fast and stable starting.
High Power Performance
Equipped with electronic unit pump (EUP) technology for smooth operation, excellent transient speed control, and strong load-handling capability.
High Fuel Economy
Four-valve design with turbocharging and intercooling provides ample air intake, thorough combustion, and low fuel consumption.
Technical Parameters
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Unit power |
400KW |
Engine |
Guangxi Yuchai/YC6TD780-D31 |
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Generator |
Yangzhou Kangcheng KC-400 |
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Engine: YC6TD780-D31 |
Generator: single bearing, IP22 protection rating, Class H insulation |
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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 connection 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 |
90 |
50 |
0.8 |
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Engine parameters |
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Manufacturer/Model |
Guangxi Yuchai/YC6TD780-D31 |
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Intake system |
Supercharging, air-to-air intercooling |
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Fuel system |
direct injection |
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Number of cylinders/arrangement |
6-cylinder/vertical, inline |
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Displacement |
19.6L |
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Cylinder bore * stroke |
152*180 mm |
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Compression ratio |
14:1 |
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Rated speed |
1500rpm |
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Engine power (main/spare) |
520KW/572KW |
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Speed control system |
Electronic control |
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Fuel system |
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Backup fuel consumption rate |
225 g/kw.h |
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Lubrication system |
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Lubricating oil capacity |
55 L |
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Cooling system |
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Coolant capacity |
130.5 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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