10kV/20kV/35kV Three-Phase Distribution Transformer (75kVA-2500kVA, 400V/440V, 50Hz/60Hz)
10kV/20kV/35kV Three-Phase Distribution Transformer (75kVA-2500kVA, 400V/440V, 50Hz/60Hz)
1. Product Overview
The 10kV, 20kV, and 35kV three-phase distribution transformer is a standard industrial power conversion device designed for medium-voltage power distribution systems. Covering common rated capacities of 75kVA, 100kVA, 500kVA, and 2500kVA, this series supports dual low voltage output of 400V and 440V, and adapts to both 50Hz and 60Hz grid frequency standards, fully complying with IEC and international power equipment specifications. As a core medium-voltage distribution transformer, it realizes safe, stable and efficient step-down power conversion from high-voltage grid to low-voltage terminal equipment, solving the power matching demand of different voltage levels and load capacities in global power distribution projects.
This three-phase power transformer adopts optimized core and winding structure design, with low no-load loss and low load loss performance. It is available in oil-immersed and dry-type configurations to adapt to different installation environments. Whether for urban grid renovation, industrial park power supply or overseas engineering projects requiring 60Hz frequency and 440V voltage output, this multi-specification distribution transformer can provide customized and standardized power distribution solutions. All products undergo strict factory testing for insulation performance, voltage resistance and load operation, ensuring long-term stable operation in complex power grid environments.
2. Core Product Purposes
2.1 Medium-to-Low Voltage Power Conversion
The primary core function of the 10kV/20kV/35kV distribution transformer is to convert medium high voltage grid power into usable 400V and 440V low-voltage power. It effectively reduces grid transmission voltage to match the operating voltage of industrial equipment, civil electrical facilities and commercial power devices, avoiding equipment damage and power safety risks caused by voltage mismatch. The multi-capacity design ranging from 75kVA to 2500kVA accurately covers light, medium and heavy load power conversion demands of different scenarios.
2.2 Power Grid Voltage Stabilization and Load Balancing
This high-efficiency distribution transformer maintains stable output voltage during peak and off-peak power consumption periods, suppresses grid voltage fluctuation, and improves the overall power supply quality of the distribution network. It can reasonably distribute grid load according to the actual power consumption of terminal equipment, balance regional power supply pressure, reduce grid operation loss, and improve the economic operation efficiency of urban and rural power grids, industrial power supply systems and temporary power distribution projects.
2.3 Adapt to Global Dual-Frequency Power Supply Standards
Different from ordinary single-frequency transformers, this series of three-phase transformers supports both 50Hz and 60Hz power grid operation, perfectly adapting to mainstream power frequency standards in China, Europe, Southeast Asia, America and other regions. The dual 400V/440V low-voltage output design meets the power supply requirements of domestic civil equipment and overseas industrial mechanical equipment, making it an essential core device for cross-border power engineering and international power distribution projects.
3. Main Application Scenarios
3.1 Urban and Rural Public Power Distribution
10kV 75kVA, 100kVA and 500kVA small and medium-capacity distribution transformers are widely used in urban residential communities, rural power grid renovation, urban street lighting, and community commercial supporting power supply. With stable 400V low-voltage output and 50Hz conventional grid frequency adaptation, they meet the daily civil power demand of residents and small commercial facilities, featuring low noise and low loss, which is friendly for residential living environments.
3.2 Industrial Park and Factory Power Supply
20kV and 35kV medium and high-voltage distribution transformers with 500kVA and 2500kVA large capacity are the preferred power supply equipment for manufacturing factories, industrial parks, chemical plants, and mechanical processing bases. For industrial production lines, heavy machinery and large electrical equipment that require 440V voltage and 60Hz frequency standards, this series of three-phase transformers can provide continuous and stable high-power power support, adapting to long-term high-load industrial operation conditions.
3.3 Commercial and Infrastructure Engineering
This multi-specification power transformer is suitable for shopping malls, office buildings, airports, railway stations, data centers and other large commercial and public infrastructure projects. The dry-type transformer model features fireproof, explosion-proof and maintenance-free performance, which can be installed indoors in dense crowds and high-standard buildings. The oil-immersed model is cost-effective and suitable for outdoor centralized power distribution stations of infrastructure projects.
3.4 New Energy and Overseas Engineering Projects
Adaptable to 50Hz/60Hz dual frequency and 400V/440V dual voltage output, this medium-voltage distribution transformer is widely used in new energy power generation projects such as photovoltaic power stations and wind power stations for grid-connected power distribution. Meanwhile, it is widely exported for overseas construction engineering, mining project power supply and regional power grid construction, becoming a mainstream customized power distribution device in international medium-voltage power projects.
4. Product Core Features
4.1 Full Specification Coverage and Strong Compatibility
This three-phase distribution transformer covers three mainstream medium voltage levels of 10kV, 20kV and 35kV, with complete capacity options from 75kVA, 100kVA, 500kVA up to 2500kVA. It supports 400V and 440V low-voltage output, and is compatible with 50Hz and 60Hz global common grid frequencies. It can match various domestic and foreign power grid standards and terminal equipment parameters, eliminating the need for repeated equipment selection and transformation for different project requirements, with extremely high engineering compatibility.
4.2 Low Loss and Energy-Saving Operation
Adopting high-quality cold-rolled silicon steel sheets and optimized winding process, the transformer effectively reduces no-load loss, load loss and magnetic leakage loss. Compared with traditional old-fashioned transformers, its energy-saving effect is significantly improved, which can effectively reduce long-term grid operation energy consumption and operating costs. The stable electromagnetic structure ensures no abnormal heating during long-term continuous operation, realizing energy-saving and environmentally friendly power distribution operation.
4.3 High Operational Stability and Safety
The product has excellent insulation performance, strong lightning resistance and short-circuit impact resistance, which can effectively cope with grid voltage fluctuation, instantaneous overload and other complex working conditions. The oil-immersed transformer adopts a fully sealed structure to isolate air and moisture, prevent insulation aging and oil deterioration, and extend service life. The dry-type transformer has flame-retardant, explosion-proof and pollution-free characteristics, with high operation safety and no hidden danger of fire and explosion, suitable for high-safety requirement scenarios.
4.4 Low Noise and Easy Maintenance
Through optimized iron core splicing and clamping technology, the magnetic致伸缩 noise of the equipment is effectively reduced, and the operation noise is far lower than the industry standard, which will not interfere with the surrounding living and working environment. The overall structure is compact and reasonable, with reserved maintenance space. Daily inspection, oil sampling, parameter debugging and other maintenance work are simple and convenient, reducing later operation and maintenance costs and labor input.
4.5 Wide Environmental Adaptability
This series of medium-voltage power transformers can operate stably in high temperature, high humidity, low temperature and other harsh outdoor environments, with strong dustproof and moisture-proof capabilities. It can adapt to outdoor substation open installation and indoor closed installation, with flexible installation methods and wide regional adaptability, meeting the power supply needs of different climatic regions and complex engineering environments.
5. Frequently Asked Questions (FAQ)
Q1: What is the difference between 50Hz and 60Hz operation of the 10kV-35kV distribution transformer?
This dual-frequency three-phase transformer is specially optimized for 50Hz and 60Hz grid standards. When operating at 50Hz, it is suitable for most domestic, European and Asian power grids, with standard 400V low-voltage output for conventional civil and industrial equipment. When switched to 60Hz operation, it adapts to American, Southeast Asian and other overseas power grid environments, matching 440V industrial equipment voltage requirements. The product has no difference in operation stability and service life under the two frequencies, and can automatically adapt to frequency conversion without manual parameter adjustment, fully meeting the needs of dual-standard projects.
Q2: How to select the correct capacity (75kVA/100kVA/500kVA/2500kVA) for practical projects?
Capacity selection depends on actual load power and future power expansion demand. 75kVA and 100kVA small-capacity transformers are suitable for residential communities, street lighting, small shops and other light-load civil scenarios with low daily power consumption. 500kVA medium-capacity models are the most widely used, applicable to small factories, community comprehensive power supply and medium-sized commercial buildings. 2500kVA large-capacity transformers are recommended for large industrial parks, manufacturing bases and regional centralized power distribution stations with long-term high-load operation demand. It is suggested to reserve 20% margin on the basis of actual load power to avoid long-term overload operation.
Q3: Can 10kV/20kV/35kV transformers be used interchangeably in power distribution systems?
They cannot be used interchangeably. The three voltage levels correspond to different grid transmission and distribution scenarios. 10kV distribution transformers are mainly used for urban and rural terminal power distribution with short transmission distance and decentralized load. 20kV transformers are suitable for suburban industrial zones and new urban areas, with longer transmission distance and larger single-point load capacity. 35kV transformers belong to regional medium-voltage power supply equipment, mostly used for regional main power distribution stations and large industrial enterprise step-down power supply. Users must select the corresponding voltage level transformer according to the local grid voltage standard to avoid equipment failure and power supply accidents.
