50HZ YUCHAI YC6T660-D31 400kW/500kVA Diesel Generator Set

50HZ YUCHAI  400kW/500kVA Diesel Generator Set

1.  Technical Parameter

2. Core Product Features

The YUCHAI YC6T660-D31 400kW/500kVA diesel generator set is a large-displacement heavy-duty industrial power generation equipment built on Yuchai mature 6T professional power engine platform. Tailored for long-hour full-load continuous operation and high-intensity emergency power supply scenarios, this500kVA 50Hz brushless diesel generator features strong power reserve, stable speed regulation and ultra-low oil consumption rate. It solves common problems of insufficient peak power and poor load adaptability of medium-power generators, and has become a mainstream high-reliability power supply equipment widely used in industrial production, municipal engineering and commercial emergency power guarantee fields.

2.1 Large-displacement Heavy-duty Structure with Strong Load Resistance

Powered by the original YC6T660-D31 dedicated power engine with a super large 16.35L displacement and 441kW rated engine power, this genset adopts a high-rigidity integral cast iron body and reinforced crankshaft structure. The vertical inline six-cylinder four-stroke design matches four valves per cylinder and turbocharged intercooled intake system, ensuring sufficient air intake and full fuel combustion. Even under long-term 100% full-load heavy-load operation, it can maintain stable and consistent power output without power attenuation. The wet removable cylinder liner design greatly simplifies daily maintenance and parts replacement work, avoiding tedious overall engine disassembly and reducing later maintenance costs. Matched with high-qualitybrushless self-excited alternator, it completely abandons the traditional carbon brush friction structure, eliminating common faults such as carbon brush aging, electric spark interference and frequent shutdown maintenance. With H-grade high-temperature resistant insulation materials and IP23 dustproof and rainproof protection grade, the whole unit can operate stably for a long time in high-temperature, humid and dusty industrial harsh environments.

2.2 Precise Electronic Fuel Control with Low Comprehensive Consumption

This industrial diesel generator is equipped with advanced electronic unit pump fuel supply system, which can intelligently match fuel supply volume according to real-time load changes, realizing precise fuel injection and efficient combustion. After professional factory calibration, the full-load fuel consumption is stably controlled at 113.8L/H, and the ultra-low oil-fuel ratio is controlled within 0.1%, effectively reducing long-term operating fuel and lubricating oil costs. The unique direct-injection reentrant ω combustion chamber optimizes fuel atomization effect, effectively reducing exhaust smoke and carbon deposition. The whole machine fully complies with Non-road National Stage III emission standards, featuring low noise and low pollutant emissions during operation. It can smoothly pass environmental assessment inspections of industrial parks and urban key construction projects, meeting the dual needs of high-efficiency power generation and green environmental protection operation.

2.3 Excellent Transient Response and Wide Environmental Adaptability

As a high-performance 440kW standby power diesel generator, this unit has outstanding dynamic load response capability and ultra-stable industrial-grade power quality. It can quickly respond to instantaneous grid load surges and voltage fluctuations, with voltage regulation accuracy controlled within 0.5%, effectively stabilizing three-phase voltage and frequency output. The G3 industrial power quality standard fully meets the power supply requirements of precision industrial control equipment, automated production lines and core public electrical facilities, avoiding equipment damage and production losses caused by power fluctuation. In terms of environmental adaptation, it supports reliable cold start at -25℃ without auxiliary heating equipment, perfectly adapting to winter outdoor construction and power supply in alpine cold regions. It maintains non-derating stable operation at an altitude of 1500 meters, and the turbocharged intercooled system can automatically adjust air intake pressure and combustion state to adapt to plateau low-pressure working environments. The IP23 professional protection structure can resist outdoor floating dust, sundries and light rain erosion, supporting long-term open-air placement and unattended automatic operation.

2.4 Low Lifecycle Failure Rate and High Cost Performance

The Yuchai 6T series heavy-duty engine adopts mature modular industrial design with compact layout and fewer vulnerable parts, effectively reducing daily failure probability and operational maintenance pressure. The brushless alternator structure eliminates regular carbon brush replacement and routine debugging work, greatly cutting down daily maintenance workload. Backed by Yuchai’s nationwide complete after-sales service network and sufficient spare parts supply system, users can obtain convenient technical support and on-site maintenance services at any time. The ultra-long major overhaul cycle of more than 12000 hours minimizes equipment shutdown maintenance time and improves overall operational efficiency. Whether used for fixed indoor standby power or mobile field main power supply, this 400kW industrial diesel generator maintains stable long-term performance and has obvious comprehensive cost performance advantages in the medium and high-power generator market.

3. Main Application Scenarios

Benefiting from stable 400kW prime continuous heavy-load power output, 440kW emergency peak power reserve and excellent multi-condition adaptability, the YUCHAI YC6T660-D31 diesel generator set covers heavy industrial production, municipal core infrastructure, large commercial complexes, field heavy-duty engineering and urban emergency power guarantee fields. It is the preferred high-power power supply equipment for medium and large-scale high-load power demand projects.

3.1 Heavy Industrial Park and Large Factory Emergency Backup Power

This 500kVA three-phase industrial diesel generator is widely deployed as core emergency backup power for heavy machinery manufacturing bases, chemical industrial parks, metallurgical plants, new energy production workshops and large mining enterprises. For fully automated production lines, heavy processing machinery and precision industrial control instruments that cannot withstand sudden power outages, the unit achieves rapid startup and automatic power switching once the municipal grid fails. It effectively avoids massive production shutdowns, product scrapping and equipment burnout losses, ensuring uninterrupted industrial production. Additionally, it serves as the main power source for remote industrial zones and mining areas with unstable grid power or insufficient power capacity, meeting long-term heavy-load off-grid power generation demands.

3.2 Large Commercial and Public Infrastructure Power Guarantee

With ultra-stable power output and high operational reliability, the genset is an ideal standby power solution for super high-rise office buildings, large shopping mall clusters, five-star hotel groups, tertiary hospitals, university campuses and urban public service centers. It provides 24-hour uninterrupted emergency power support for critical facilities including hospital emergency rescue systems, building fire linkage equipment, large data center monitoring systems and public power distribution systems. It effectively eliminates safety hazards and operational losses caused by sudden power failures, ensuring stable operation of urban public infrastructure and large commercial facilities.

3.3 Municipal and Field Heavy-duty Engineering Main Power Supply

In municipal key projects, bridge and tunnel construction, water conservancy and hydropower engineering, railway transit construction and remote field exploration projects without stable grid coverage, this Yuchai heavy-duty generator acts as the primary power supply equipment. It steadily provides continuous power for large engineering machinery, high-power welding equipment, field assembly lines and temporary office facilities. Its excellent low-temperature startup performance and plateau non-derating capability enable stable operation in complex and harsh field environments, making it essential power guarantee equipment for large-scale infrastructure and field engineering teams.

3.4 Urban Emergency Rescue and Special Scenario Power Supply

The unit is commonly used for urban natural disaster emergency relief, power grid overhaul emergency power supply, large communication base station cluster backup power, scenic area peak power supply and remote regional power supply. When extreme weather, grid faults or large-scale power outages occur, it starts up quickly and puts into operation to sustain basic urban operational power demands. It also meets high-load temporary power needs for large outdoor exhibitions, temporary engineering construction and emergency rescue sites, featuring strong scenario compatibility and practical value.

4. Core Product Purpose

The core purpose of the YUCHAI YC6T660-D31 400kW/500kVA diesel generator set is to deliver stable, high-power and low-maintenance heavy-load power supply solutions for large industrial and commercial high-load projects. The 400kW prime power rating is designed for long-term continuous bearing of industrial heavy-load equipment, fully meeting daily off-grid main power supply and long-duration continuous power generation requirements of large enterprises, mining areas and large-scale engineering projects. The 440kW standby power reserves sufficient peak capacity to handle sudden power failure emergencies and instantaneous heavy-load power surges, solving common industry pain points such as municipal grid instability, regional power shortages and economic losses caused by unexpected power interruptions.

As a cost-effective 50Hz industrial brushless self-excited heavy-duty diesel generator set, this model focuses on industrial-grade heavy-load reliability and long-term operational economy. Adopting Yuchai 6T series large-displacement heavy-duty engine technology and high-stability brushless alternator configuration, it enhances equipment anti-interference ability and harsh environment resistance while reducing long-term operation and maintenance costs for users. It not only satisfies high-load power demands of heavy industrial production and large commercial complex operation, but also provides reliable power guarantee for harsh field engineering construction and urban comprehensive emergency rescue scenarios, standing as a practical and durable high-power generation device integrating stability, high power and energy saving.

5. Common FAQ

Q1: What is the actual usage difference between prime power and standby power of YC6T660-D31 generator set?

Prime power (400kW/500kVA) refers to the continuous usable rated power of the genset, supporting long-term cyclic full-load operation. It is mainly applied to daily main power supply, long-term off-grid power generation and stable heavy-load industrial production operation. Standby power (440kW/550kVA) is short-term emergency peak power, exclusively used for sudden grid power failure or instantaneous heavy-load surge scenarios. It only allows short-duration emergency operation and cannot run continuously at full load for a long time. Prolonged overloaded operation will accelerate aging of core engine components and shorten the unit’s overall service life. In actual engineering applications, professional operators usually control the operating load within 80% of prime power to ensure long-term stable and efficient operation.

Q2: What are the unique advantages of YC6T660-D31 large-displacement generator compared with ordinary same-power units?

The YC6T660-D31 generator set adopts Yuchai classic 6T series 16.35L super large-displacement heavy-duty engine, with higher power reserve and stronger impact resistance than ordinary same-power generators. Equipped with electronic unit pump fuel supply system, it achieves more precise fuel control and more stable speed regulation. The ultra-low 0.1% oil-fuel ratio effectively reduces daily lubricating oil consumption and long-term operating costs. Matched with industrial brushless self-excited alternator, H-grade high-temperature insulation and IP23 dustproof and rainproof protection, the whole unit has stronger environmental adaptability, lower failure rate and longer service life, which is more suitable for long-term unattended heavy-load operation in industrial and outdoor harsh scenarios.

Q3: What kind of harsh working environments can this Yuchai 400kW diesel generator adapt to?

This Yuchai 6T series heavy-duty industrial genset has passed strict extreme environment adaptation tests with excellent environmental tolerance. It achieves reliable cold start at -25℃ without auxiliary heating equipment, adapting to winter outdoor construction and industrial power supply in alpine cold regions. The unit maintains stable non-derating power output at an altitude of 1500 meters, and the turbocharged intercooled system automatically adjusts air intake and combustion status to adapt to plateau low-pressure working conditions. Supported by IP23 professional protection capability, it effectively resists outdoor dust, moisture and light rain erosion, supporting long-term open-air placement and unattended continuous operation for various complex industrial, municipal and field engineering scenarios.