50Hz SDEC 6KTAA25-G311 400kW/500kVA Diesel Generator Set

 SDEC  400kW/500kVA  Diesel Generator Set

1.  Technical Parameter

2. Product Features of SDEC 6KTAA25-G311 500kVA Diesel Generator Set

The SDEC 6KTAA25-G311 400kW/500kVA 50Hz diesel generator set is a mid-to-high power industrial genset built with SDEC mature K-series engine platform. Different from traditional V-type engine units, this generator adopts inline 6-cylinder four-valve structure, matched with turbocharged air-to-air intercooling technology and electronic high-pressure common rail fuel injection system. It balances high power output, low fuel consumption and stable operation performance, and is a cost-effective power supply equipment widely recognized in the 500kVA industrial generator market.

In terms of power performance, this 400kW prime power generator set has stable and sufficient power reserve. The rated prime power reaches 400kW (500kVA), and the standby emergency power is up to 440kW (550kVA). The 25.18L large displacement inline engine delivers more linear power output, effectively avoiding power attenuation during long-term full-load operation. With a speed governing rate controlled within 5%, the unit can resist instantaneous load impact, ensure stable frequency and voltage output, and fully adapt to continuous high-load operation of industrial mechanical equipment and precision electrical devices.

In terms of power generation quality and durability, the unit is equipped with a high-performance brushless self-excited alternator. Canceling the traditional carbon brush and slip ring structure, it avoids frequent failures such as poor contact and power jitter caused by carbon brush wear, greatly reducing daily maintenance frequency and later operation costs. Equipped with H-grade high-temperature resistant insulation materials, the alternator can operate stably for a long time under high temperature and high load conditions without insulation aging or breakdown. The IP23 professional dustproof and waterproof protection grade enables the unit to adapt to outdoor open-air construction, dusty factory workshops and other harsh working environments, with strong environmental adaptability.

Energy-saving economy is another core advantage of the 6KTAA25-G311 diesel generator set. Adopting electronic direct injection and high-pressure common rail fuel supply technology, the fuel atomization effect is uniform and combustion is sufficient. The full-load fuel consumption is only 109L/H, and the minimum fuel consumption rate is as low as 195g/kW·h. Compared with same-power competitive models, it has lower comprehensive operating fuel consumption, which can effectively reduce the long-term power consumption cost of users. The optimized water circulation cooling system ensures stable temperature rise during long-time continuous operation, preventing engine overheating failure and improving overall operational stability.

In terms of industrial practicability and safety, the whole machine adopts industrial integrated casting structure with solid and durable components. The 24V DC electric starting system ensures reliable quick start at low temperature and extreme weather, with high starting success rate. The unit supports long-term unattended operation, and the built-in AVR automatic voltage regulator can intelligently adjust voltage output to ensure pure sine wave power supply, no harmonic interference, and compatible with all kinds of industrial equipment, commercial electrical facilities and precision instruments. It is suitable for both fixed indoor installation and temporary outdoor mobile power supply scenarios.

3. Application Scenarios

As a mainstream 50Hz high-power SDEC diesel generator set, the 6KTAA25-G311 400kW/500kVA genset supports dual usage of prime power continuous power supply and standby emergency power supply. It covers multiple fields such as industrial manufacturing, infrastructure engineering, municipal public facilities, commercial real estate and remote field operation, and can meet medium and large power demand of different industries.

Industrial Manufacturing Scenarios: This 500kVA industrial diesel generator set is widely used in large processing plants, chemical enterprises, building materials factories, mining factories and other high-power industrial sites. For remote industrial parks without complete municipal grid coverage, it can be used as prime power to provide 24-hour uninterrupted power supply for production lines, transmission equipment, ventilation systems and power distribution equipment. For urban industrial enterprises, it acts as emergency standby power to cope with sudden grid power failure, peak power limitation and power grid maintenance, avoiding production shutdown and economic losses.

Infrastructure & Field Engineering Scenarios: It is the preferred temporary power supply equipment for highway and bridge construction, railway engineering, water conservancy projects, municipal renovation and field exploration operations. Most outdoor engineering sites lack fixed grid access conditions. The 550kVA standby power reserve can fully meet the centralized power consumption demand of construction machinery, welding equipment, temporary office and living electricity. Thanks to IP23 protection and strong high-low temperature resistance, it can operate stably in dusty, high-temperature and humid outdoor harsh environments.

Commercial & Public Service Scenarios: The SDEC 400kW diesel generator set is commonly used as emergency backup power for high-rise office buildings, large shopping malls, hotel complexes, hospitals, schools and government institutions. When the municipal power grid fails, the unit can start quickly and switch power supply automatically, ensuring the normal operation of fire protection systems, elevator equipment, medical precision instruments, lighting and ventilation systems, effectively avoiding public safety risks and property losses caused by power outage.

Special Off-Grid Power Supply Scenarios: It is applicable to communication base station clusters, data center auxiliary power supply, oil field operation areas, mountain remote settlements and island power supply. These scenarios have high requirements for power supply stability and continuity, and lack stable municipal grid support. The 6KTAA25-G311 high-power generator set can realize long-term stable off-grid power supply, solving the power shortage problem of remote special operation sites.

4. Core Purposes

The core value of the SDEC 6KTAA25-G311 400kW/500kVA diesel generator set is to provide stable, energy-saving and low-maintenance high-power power supply solutions for medium and large industrial and commercial scenarios. It mainly undertakes three core functions: off-grid prime power continuous power supply, grid-connected standby emergency power guarantee and industrial peak shaving power compensation, covering diversified power demand of various industries.

Prime Power Continuous Power Supply (400kW/500kVA): As the main power supply equipment for off-grid areas and areas with insufficient grid capacity, the unit supports long-term 24-hour uninterrupted operation under rated load. It is mainly used for remote industrial parks, field engineering projects, mining areas and off-grid public facilities to undertake daily continuous power supply tasks. Its excellent fuel economy and stable power output can effectively reduce the long-term operation cost of users and solve the problem of insufficient power supply in remote areas.

Standby Emergency Power Guarantee (440kW/550kVA): For grid-connected enterprises and public facilities with high power supply reliability requirements, this 550kVA standby diesel generator set serves as a key emergency power backup. Once the municipal power grid is cut off, failed or fluctuates abnormally, the unit can complete quick start and power switching in a short time, ensuring the continuous operation of key production equipment and public service facilities, avoiding production shutdown, data loss and safety accidents, and improving the safety and stability of on-site power consumption.

Industrial Grid Peak Shaving & Power Compensation: For large industrial enterprises with large power consumption and obvious peak-valley power difference, the 6KTAA25-G311 generator set can be started during grid peak power consumption periods to compensate for insufficient grid power supply. It effectively reduces enterprise peak power consumption costs, avoids production restriction and shutdown caused by grid peak regulation. Relying on brushless self-excited design and H-grade high-temperature resistance, the unit can realize long-term unattended peak shaving operation with low failure rate and minimal later maintenance workload.

5. Frequently Asked Questions (FAQ)

Q1: What is the practical difference between prime power and standby power of 6KTAA25-G311 generator set?

The 400kW/500kVA prime power refers to the long-term continuous operating power of the unit, which supports 24-hour full-load stable operation and is suitable for off-grid daily power supply scenarios. The 440kW/550kVA standby power is emergency peak power with 10% power reserve, only used for short-term power supply during municipal grid power failure. It cannot operate under full load for a long time, otherwise it will aggravate engine wear and shorten service life. In actual use, off-grid fixed power supply adopts prime power mode, and grid-connected emergency backup scenarios adopt standby power mode.

Q2: What are the advantages of inline 6-cylinder structure of SDEC 6KTAA25-G311 engine compared with V-type engines?

The 6KTAA25-G311 adopts inline 6-cylinder four-valve structure, which has more uniform fuel combustion and more linear power output than traditional V-type engines of the same power. The inline structure features lower vibration, better operational stability and longer service life during long-term full-load operation. Matched with high-pressure common rail fuel injection technology, it has higher fuel utilization efficiency and lower full-load fuel consumption. In addition, the inline engine has a simpler internal structure, more convenient daily inspection and maintenance, and lower later maintenance costs, which is more suitable for long-term industrial continuous operation.

Q3: How to reduce the operating fuel consumption of 6KTAA25-G311 500kVA diesel generator set?

The standard full-load fuel consumption of the unit is 109L/H. In daily operation, keeping the unit running at 70%-80% rated load is the most energy-efficient working state, which can significantly reduce comprehensive fuel consumption. Regular replacement of diesel filter, air filter and oil filter can ensure smooth air intake and fuel supply, maintain sufficient combustion state, and avoid increased fuel consumption caused by accessory blockage. Meanwhile, reducing frequent start-stop and long-term no-load idling can effectively optimize fuel economy. The original calibrated high-pressure common rail system can always maintain efficient combustion and balance power output and energy consumption.