50HZ Yuchai YC4D90Z-D25 50kW/62.5kVA Diesel Generator Set

50HZ Yuchai   50kW/62.5kVA Diesel Generator Set

1. Complete Technical Parameter Table

The following table summarizes the official factory parameters and industry standard universal configurations of the Yuchai YC4D90Z-D25 diesel generator set. All technical data is verified through bench calibration and actual field operation, covering generator set power indicators, original diesel engine core configurations, alternator performance and daily operating parameters. It can be used directly for equipment selection, project bidding, on-site installation guidance and routine maintenance management.

2. Product Features

The Yuchai YC4D90Z-D25 50kW/62.5kVA diesel generator set is a high-performance medium-large power generation equipment built on Yuchai mature 4D turbocharged engine platform. As a widely recognized 62.5kVA diesel generator in the market, this unit adopts original Yuchai YC4D90Z-D25 turbocharged power core, featuring reinforced mechanical structure and excellent transient load response. It meets G3 generator performance grade standards, with strong load impact resistance and stable continuous power supply capacity, effectively solving the problems of slow load response and unstable voltage of ordinary medium-power generator sets in complex working conditions.

In terms of power output stability, the unit supports 50kW long-term uninterrupted prime power operation and 55kW emergency standby power supply. The engine’s maximum power reaches 66kW, reserving sufficient power margin for daily load changes and instantaneous equipment startup surge. Even with multi-device simultaneous startup and variable load operation, it will not experience obvious voltage drop or frequency drift. Matched with high-quality brushless self-excited alternator and high-precision AVR automatic voltage regulator, the 50Hz fixed-frequency three-phase voltage output is always balanced and stable. Equipped with H-grade ultra-high temperature resistant insulation materials, the alternator can resist long-term high-load heat aging, effectively avoiding insulation breakdown and circuit faults, and providing reliable power protection for industrial precision equipment and engineering electrical devices.

Low maintenance difficulty and high environmental adaptability are the core practical advantages of this Yuchai 50kW standby diesel generator set. Different from traditional brushed generators that require regular carbon brush replacement and maintenance, the brushless self-excited structure eliminates wearable vulnerable parts, realizing long-term maintenance-free operation. It greatly reduces daily equipment maintenance workload and later operating costs, which is very suitable for unattended long-term standby scenarios. The IP23 professional protection grade can effectively block outdoor dust, debris and splashing rainwater, adapting to open-air placement and harsh construction site working environments. The reinforced crankshaft and gantry cylinder block structure improve the overall vibration resistance and structural stability of the unit, extending the whole machine service life in high-intensity working conditions.

In terms of fuel economy and operational reliability, the YC4D90Z-D25 turbocharged diesel engine adopts optimized direct injection combustion technology, with full-load fuel consumption stably controlled at 15.3L/H. The fuel combustion is sufficient and uniform, with stable fuel consumption curve in long-term variable-load operation, avoiding excessive fuel waste. The four-cylinder in-line water-cooled structure runs smoothly with low vibration and low noise, reducing mechanical loss during operation. The closed circulating water cooling system ensures continuous and efficient heat dissipation, and the unit will not overheat and shut down even in high-temperature summer working environments. Meanwhile, the unit is equipped with complete intelligent safety protection functions, which can automatically alarm and shut down in case of low oil pressure, high water temperature, overload, short circuit and overspeed, ensuring safe and stable operation.

The whole machine adopts optimized compact short-axis design, which is 30cm shorter than conventional generator sets of the same power, saving installation space and facilitating mobile transfer. It supports fixed indoor installation and mobile trailer refitting, meeting the dual use needs of long-term fixed standby power and short-term mobile temporary power. With Yuchai’s strict factory quality inspection and complete national after-sales service network, this 62.5kVA diesel generator has low failure rate, strong versatility and high cost performance, which is a preferred power generation equipment for industrial, engineering and commercial users.

3. Application Scenarios

With strong load capacity, fast transient response, stable power output and diverse installation forms, the YC4D90Z-D25 Yuchai diesel generator set covers industrial emergency standby power, large engineering temporary power supply, outdoor field off-grid power generation and commercial public facility backup power, adapting to various complex working scenarios with medium and high power demand.

3.1 Industrial Production Emergency Standby Power

This 50kW diesel generator is widely used for backup power supply of medium-sized processing factories, mechanical manufacturing workshops, food processing plants, constant-temperature cold storage and industrial supporting facilities. For industrial production lines and precision processing equipment that cannot tolerate power outage, the unit can start quickly and complete seamless power switching after municipal grid failure. Its excellent load impact resistance can cope with sudden load changes of industrial equipment, effectively avoiding product scrapping, equipment shutdown damage and production progress delay caused by sudden power interruption, and ensuring the continuous and stable operation of industrial production.

3.2 Large Construction & Municipal Engineering Temporary Power

It is the mainstream temporary power supply equipment for large-scale road reconstruction, municipal pipeline renovation, water conservancy projects, bridge engineering and infrastructure construction. The sufficient power reserve and fast response speed can fully meet the simultaneous power consumption of multiple welding machines, cutting equipment, engineering machinery and on-site large-area construction lighting. The dust-proof and vibration-resistant body structure adapts to harsh construction site environments, and the compact mobile design supports frequent site transfer, effectively improving overall construction power supply efficiency and project progress.

3.3 Outdoor Field Operation Off-grid Power Supply

The unit is perfectly applicable for field geological exploration, forest fire prevention inspection, outdoor emergency rescue engineering, remote mountain road construction and field scientific research operations. In remote areas without municipal grid coverage, it can be used as an independent mobile power station to provide long-term stable 380V three-phase high-power power for field detection instruments, communication relay equipment and operational auxiliary facilities. The reliable DC24V electric start system ensures smooth one-key startup in low-temperature and dry field environments, with strong environmental tolerance.

3.4 Commercial & Public Facility Backup Power

It is commonly used for emergency standby power of large community clusters, commercial plazas, hotels, supermarkets, scenic area supporting facilities and communication base stations. During municipal grid power failure, peak power limit or line maintenance periods, the unit can provide stable power guarantee for building lighting, monitoring systems, weak current equipment and public service facilities, avoiding operational stagnation and public service paralysis caused by power outages, and ensuring the normal operation of urban public and commercial facilities.

4. Core Purposes

The core purpose of the Yuchai YC4D90Z-D25 50kW/62.5kVA diesel generator set is to provide high-stability emergency standby power and high-reliability off-grid mobile power supply for industrial production, engineering construction and public service fields. It solves various power supply risks such as municipal grid instability, sudden power failure and no grid coverage, and guarantees the continuous, safe and efficient operation of medium and high-power electrical equipment. It is a multi-functional universal power generation equipment integrating industrial standby and engineering temporary power generation.

Firstly, it undertakes key industrial emergency power backup tasks. As a high-performance 62.5kVA standby diesel generator, it has sufficient standby power reserve and fast transient response capability. It can automatically start and switch power supply in a short time after sudden grid power failure, effectively avoiding large-area industrial production shutdown losses and equipment safety accidents caused by power interruption, and protecting the stable operation of factory production lines and precision industrial equipment.

Secondly, it provides sustainable high-power off-grid power support for engineering and remote scenarios. In large-scale engineering construction and unpowered remote areas, the unit acts as an independent mobile power generation system, outputting standard 50Hz frequency and stable three-phase high-power voltage. It fully meets the simultaneous power demand of multiple engineering mechanical equipment, solving the power supply bottleneck of large-scale off-grid construction and field operation teams.

Thirdly, it balances power performance and long-term operational economy. With calibrated 15.3L/H full-load fuel consumption and Yuchai’s mature turbocharged energy-saving combustion technology, the unit maintains controllable comprehensive operating costs while providing strong power output. The brushless maintenance-free design and IP23 high-standard protection structure reduce equipment failure rate and later maintenance investment, realizing long-term stable and low-cost power generation operation.

Finally, as an upgraded classic model of Yuchai 4D series medium and large-power generator sets, it fills the market gap of high-reliability and space-saving 50kW industrial power generation equipment. It perfectly matches the power demand of medium-sized industrial enterprises, large engineering construction teams and public property management units, and has become one of the most cost-effective and widely applied general-purpose diesel generator sets in the medium and large-power market.

5. FAQ - Common Frequently Asked Questions

Q1: What is the actual fuel consumption of YC4D90Z-D25 generator set under different working loads?

A1: The official factory calibrated full-load (100% load) fuel consumption of this Yuchai 62.5kVA diesel generator set is 15.3L/H. In actual on-site operation, fuel consumption changes linearly with the working load. Under 50% light load, the fuel consumption is about 7.5-8.0L/H; under 75% conventional daily working load, the fuel consumption is controlled at 11.2-12.0L/H. Adopting optimized turbocharged direct injection combustion technology, the fuel burns fully and evenly, with a stable fuel consumption curve. There will be no sudden fuel surge during long-term continuous operation, which can effectively control daily power generation costs for industrial standby and engineering power supply users.

Q2: What are the practical advantages of the brushless self-excited alternator equipped on this unit?

A2: This Yuchai 50kW diesel generator adopts industrial-grade brushless self-excited alternator, which has obvious practical advantages over traditional brushed alternators. Firstly, it removes wearable carbon brush parts, realizing true maintenance-free daily operation, eliminating regular carbon brush replacement and maintenance costs, and greatly reducing on-site equipment management pressure. Secondly, matched with intelligent AVR automatic voltage regulation technology, the voltage output is ultra-stable with almost no current fluctuation, which can well protect industrial production equipment and precision instruments from burnout damage. Thirdly, the fully enclosed structure cooperates with H-grade ultra-high temperature insulation and IP23 protection grade, with excellent dust-proof, rain-proof and high-temperature resistance, adapting to various complex and harsh industrial and construction site environments.

Q3: How is the environmental adaptability and startup stability of the YC4D90Z-D25 generator set?

A3: This medium and large-power Yuchai generator set has excellent environmental adaptability and ultra-high startup reliability. It adopts standard DC24V electric start system, which can achieve one-time successful startup in conventional low-temperature, dry and cold environments without manual auxiliary start. The applicable ambient temperature ranges from -15℃ to 45℃, adapting to seasonal temperature changes in most regions. The closed circulating water cooling system effectively controls the unit temperature, avoiding overheating shutdown during long-term full-load operation in high-temperature environments. The IP23 protection grade resists daily dust erosion and splashing rainwater, supporting outdoor open-air placement and indoor fixed installation. It operates stably in industrial workshops, construction sites, field operation environments and public facility scenarios with strong compatibility.