50Hz SDEC SC25G690D2 400kW/500kVA Diesel Generator Set

SDEC 400kW/500kVA  Diesel Generator Set

1. Technical Parameter

2. Product Features of SDEC SC25G690D2 500kVA Diesel Generator Set

The SDEC SC25G690D2 400kW/500kVA diesel generator set is a high-power industrial power generation equipment launched by Shanghai Diesel Engine, specially optimized for medium and large industrial continuous power supply and emergency backup power scenarios. Adopting the mature SC25G series 12-cylinder V-type turbocharged intercooled diesel engine, this 50Hz diesel generator set has outstanding power performance, stable operation and strong environmental adaptability, and is one of the most cost-effective SDEC industrial generator sets in the 500kVA power segment.

In terms of power performance, the unit features strong power reserve and stable output. The rated prime power reaches 400kW (500kVA), and the standby emergency power can hit 440kW (550kVA). The 12-cylinder large-displacement engine structure matches the professional turbocharged air intake system, which effectively improves combustion efficiency and power conversion rate. It can cope with long-term full-load continuous operation and instantaneous peak load impact, avoiding voltage drop, frequency fluctuation or sudden shutdown caused by load changes. The speed regulation rate is controlled within 5%, ensuring consistent and reliable power supply for high-precision industrial equipment.

In terms of power generation quality and durability, the unit is equipped with a high-performance brushless self-excited alternator, which completely abandons the traditional carbon brush excitation structure. It has no vulnerable carbon brush parts, effectively reducing daily maintenance frequency and later operating costs. Equipped with H-grade high-temperature resistant insulation materials, the alternator can resist high-temperature aging and electrical breakdown, adapting to long-term high-load operation in harsh industrial environments. The IP23 professional protection grade can effectively block dust, moisture and splashing water, realizing stable operation in outdoor open-air construction sites, factory workshops and other complex working conditions. The built-in AVR automatic voltage regulator ensures ultra-low waveform distortion, providing pure sine wave power supply that meets national industrial power supply standards.

In terms of fuel economy and operational stability, the SC25G690D2 diesel engine adopts direct injection fuel supply technology, with accurate fuel atomization and sufficient combustion. The full-load fuel consumption is controlled at 111L/H, achieving a good balance between high power output and energy-saving operation. Compared with peer high-power generator sets, it has lower comprehensive fuel consumption and longer continuous operation cycle. The optimized water cooling circulation system ensures stable engine temperature rise during long-time full-load operation, effectively reducing mechanical failure rate and extending the overall service life of the unit.

In terms of industrial practicability, this 400kW industrial diesel generator set adopts integrated industrial design, with compact structure and reasonable layout of internal components. The 24V DC electric starting system ensures reliable quick start at low temperature and extreme weather, without manual auxiliary starting. The whole machine has strong overload resistance and low failure rate, supporting long-term unattended operation, which is very suitable for fixed backup power supply and off-grid prime power supply in industrial parks, engineering projects and public facilities.

3. Application Scenarios

As a high-power 50Hz SDEC diesel generator set with 500kVA prime power and 550kVA standby power, the SC25G690D2 model covers dual application modes of continuous prime power supply and emergency standby power supply. It is widely used in industrial production, engineering construction, municipal public facilities, commercial real estate, remote field operation and other fields, and is the mainstream power guarantee equipment for medium and large power demand scenarios.

Industrial Factory Production Scenarios: This 400kW industrial generator set is suitable for large processing factories, chemical plants, mining enterprises, building materials 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, mechanical equipment, ventilation and power distribution systems. For urban industrial enterprises, it serves as emergency standby power to prevent production shutdown, equipment damage and economic losses caused by sudden grid power failure, peak power limitation and power grid maintenance.

Outdoor Engineering & Infrastructure Construction Scenarios: It is the preferred temporary power supply equipment for highway and bridge engineering, railway construction, water conservancy projects, municipal road renovation and large-scale field construction sites. Most outdoor engineering sites lack fixed power grid access conditions. The 550kVA maximum standby power can fully meet the centralized power consumption demand of construction machinery, welding equipment, temporary office and living electricity, and adapt to dusty, high-temperature and low-temperature harsh construction environments with its IP23 protection performance.

Commercial & Public Facility Emergency Scenarios: The SDEC 500kVA diesel generator set is widely applied in 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, avoiding public safety risks and property losses caused by power outage.

Special Field & Off-Grid Operation Scenarios: It is applicable to communication base station clusters, field exploration operations, oil field working areas, mountain remote settlements and island auxiliary power supply scenarios. These scenarios have high requirements for power supply stability and continuity and lack stable grid support. The SC25G690D2 high-power generator set can realize long-term stable off-grid power supply, effectively solving the power shortage problem of remote special operation sites.

4. Core Purposes

The core purpose of the SDEC SC25G690D2 400kW/500kVA diesel generator set is to provide stable, efficient and low-cost high-power power supply solutions for medium and large industrial and commercial scenarios, covering prime power continuous power supply, standby emergency power guarantee and grid peak shaving power compensation three core usage scenarios, meeting the diversified power demand of different 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, undertaking daily continuous power supply tasks. Its stable power output and controllable fuel consumption can effectively reduce the long-term power 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 acts as a key emergency power backup. Once the municipal power grid is cut off, failed or fluctuates abnormally, the unit can start and switch power supply in a short time, ensuring the continuous operation of key equipment, avoiding production shutdown, data loss and safety accidents, and improving the safety and stability of on-site power consumption.

Grid Peak Shaving & Power Compensation: For large industrial enterprises with large power consumption and obvious peak-valley power difference, the SC25G690D2 high-power generator set can be started in the peak power consumption period to compensate for insufficient grid power supply, reduce enterprise peak power consumption costs, and avoid production restriction and shutdown caused by grid peak regulation. Relying on H-grade insulation and brushless self-excited design, the unit can realize long-term unattended peak shaving operation, with high operational efficiency and low maintenance cost.

5. Frequently Asked Questions (FAQ)

Q1: What is the actual operating difference between prime power and standby power of SC25G690D2 generator set?

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

Q2: Why is brushless self-excited alternator the mainstream configuration for this 500kVA SDEC generator set?

Different from traditional brushed alternators, the brushless self-excited alternator adopted by SC25G690D2 has no carbon brush and slip ring wearing parts. It fundamentally eliminates common faults such as poor contact and power supply jitter caused by carbon brush wear. Combined with H-grade insulation and IP23 protection capability, it adapts to long-term high-load and harsh environment operation. It greatly reduces daily maintenance workload and replacement cost of vulnerable parts, and has more stable power generation quality and longer service life, which is very in line with the long-term operation needs of industrial high-power generator sets.

Q3: How to reasonably control the fuel consumption of SC25G690D2 diesel generator set in daily operation?

The standard full-load fuel consumption of the unit is 111L/H. In daily use, keeping the unit operating at 70%-80% rated load can achieve the best energy-saving effect and lowest comprehensive fuel consumption. Regular replacement of diesel filter, air filter and oil filter can ensure sufficient engine combustion and avoid increased fuel consumption caused by blockage and aging of accessories. In addition, reducing frequent start-stop and long-term no-load idling can effectively optimize fuel economy. The original calibrated fuel injection system of SDEC engine can maintain efficient combustion state under stable load, ensuring balanced power output and fuel consumption.