500kva 10kv 400v Oil Immersed Transformer Electrical Transformers
500kva 10kv 400v Oil Immersed Transformer Electrical Transformers
1. Product Overview
The 500kva 10kv 400v Oil Immersed Transformer Electrical Transformers are high-performance medium-capacity distribution transformers widely used in municipal power grids, industrial park power distribution and commercial power supply systems. Manufactured in full compliance with IEC 60076 international power transformer standards and global industrial electrical specifications, this 10kV to 400V step down oil immersed transformer serves as core power conversion equipment for medium and low voltage power transmission and distribution projects, delivering stable and reliable voltage transformation for medium-load power consumption scenarios.
Designed with a standard 10kV high-voltage input and 400V low-voltage output configuration, this three-phase oil immersed electrical transformer specializes in converting medium-voltage grid power into usable low-voltage industrial and civil power. Adopting premium insulating mineral oil cooling technology and fully sealed tank structure, the 500kVA oil immersed distribution transformer features excellent heat dissipation performance, strong overload resistance and outstanding environmental adaptability. Different from dry-type electrical transformers, this oil type transformer requires lower investment cost and supports long-term outdoor continuous operation, making it a mainstream choice for grid upgrading and industrial power expansion projects.
All finished 500kVA 10kV/400V oil immersed transformers undergo strict factory quality inspections, including partial discharge testing, temperature rise testing, short-circuit impact testing and full-load operation verification. With low operational loss, stable three-phase balance performance and long service life, these industrial electrical transformers have become hot-selling power equipment for urban and rural power grid renovation, factory power supply and public infrastructure power distribution projects worldwide.
2. Technical Parameters
Technical Parameter Item | 500kVA 10kV/400V Oil Immersed Electrical Transformer |
Rated Capacity | 500 KVA |
Primary Rated Voltage | 10kV (±2×2.5% / ±5% off-load tapping adjustable) |
Secondary Rated Voltage | 400V / 415V customizable (Three-phase four-wire) |
Working Frequency | 50Hz / 60Hz dual frequency optional |
Phase Structure | Three Phase |
Cooling Method | ONAN (Oil Natural Air Natural) |
Vector Group | Dyn11 / Yyn0 optional |
No-load Loss | ≤850W |
Load Loss (75℃) | ≤5950W |
Short-circuit Impedance | 4.5% |
No-load Current | ≤0.8% |
Winding Material | Pure Copper / Aluminum customizable |
Insulation Level | 10kV Medium Voltage Grade |
Operating Temperature Range | -25℃ ~ +50℃ |
Design Service Life | 25 Years |
3. Core Product Features
This 500kVA 10kV/400V oil immersed electrical transformer integrates upgraded energy-saving design, mature sealing technology and industrial-grade optimization. It delivers outstanding stability, low power consumption and strong environmental adaptability, fully meeting the long-term full-load operation requirements of medium-capacity power distribution systems:
3.1 Ultra-low Loss & High Energy Efficiency
The transformer core adopts high-permeability grain-oriented cold-rolled silicon steel sheets with full oblique lap joint technology, which effectively suppresses magnetic flux leakage and greatly reduces no-load iron loss. The precisely arranged winding structure minimizes copper loss during full-load operation. Compared with traditional old-model electrical transformers, this oil immersed step down transformer significantly reduces daily operating power consumption and grid line loss, providing stable energy-saving benefits for long-term grid operation and industrial power supply.
3.2 Reliable Oil Immersed Cooling & Insulation System
Filled with high-purity anti-aging non-PCB mineral insulating oil, the 500kVA oil immersed transformer forms a natural circulating heat dissipation system. The standard ONAN cooling mode realizes automatic heat exchange without auxiliary cooling equipment, ensuring uniform heat dissipation of windings and iron core even during 24-hour uninterrupted full-load operation. The fully sealed corrugated oil tank structure isolates internal insulating oil from external air, moisture and dust, preventing oil emulsification, oxidation and insulation aging, and maintaining stable high insulation performance in complex outdoor environments.
3.3 Stable Voltage Output & Strong Anti-interference
Equipped with professional off-load voltage tapping adjustment function, the electrical transformer can calibrate 10kV input voltage deviation within ±5% range to ensure stable 400V low-voltage output. Optional Dyn11 and Yyn0 vector group designs effectively balance three-phase current, suppress grid harmonic interference and voltage fluctuation, and adapt to dynamic load changes of industrial equipment and municipal power loads. It can resist instantaneous grid voltage surge and avoid power supply instability caused by unbalanced three-phase load.
3.4 Excellent Weather Resistance & Structural Durability
The whole machine adopts thickened steel plate welding structure and anti-corrosion electrostatic spray treatment, with excellent waterproof, dustproof, rust-proof and anti-aging performance. This 10kV/400V oil immersed electrical transformer can operate stably in outdoor open-air substations, humid industrial zones and suburban power distribution stations, adapting to extreme temperature changes and harsh climatic conditions all year round. The reinforced internal winding structure has strong vibration resistance and short-circuit impact resistance, effectively reducing equipment failure rate.
3.5 Low Maintenance & High Cost Performance
With a simple and reliable mechanical structure, this medium-capacity oil immersed transformer has almost no vulnerable parts. The fully sealed maintenance-free design greatly extends the replacement cycle of insulating oil, reducing daily inspection and maintenance workload and operational costs. Compared with dry-type transformers with the same capacity, this oil type electrical transformer has lower procurement cost and better load resistance, achieving high cost performance for medium-scale power distribution projects.
3.6 Safe & Low-noise Operation
Optimized core vibration reduction and winding fixing technology effectively control operating noise, meeting urban environmental protection noise standards. Equipped with standard oil level gauge, temperature detector and pressure relief valve, the transformer can monitor operating oil level and temperature in real time. The pressure relief device automatically releases pressure under overload and overheating faults, avoiding equipment damage and ensuring safe and stable operation of the entire power distribution system.
4. Core Product Uses
As key medium-capacity power transformation equipment for 10kV power grid systems, the 500kva 10kv 400v Oil Immersed Transformer Electrical Transformers undertake multiple core functions of voltage conversion, power distribution and grid stabilization, ensuring safe, efficient and stable operation of medium-load power consumption systems:
10kV to 400V Medium-Low Voltage Step-down Conversion: The core function is to convert 10kV medium-voltage grid transmission power into standard 400V low-voltage power, realizing safe voltage matching between overhead high-voltage lines and terminal industrial and civil electrical equipment, which is the basic guarantee for medium-scale power supply scenarios.
Centralized Regional Power Distribution: This oil immersed electrical transformer undertakes centralized power distribution tasks for industrial parks, urban communities and township power grids, reasonably distributing grid power according to actual load demand, balancing three-phase load current and reducing power transmission line loss and voltage drop.
Power Supply Quality Optimization & Stabilization: By adjusting off-load tap positions, the equipment calibrates system voltage deviation caused by long-distance transmission loss and seasonal load changes, stabilizes terminal 400V voltage within standard range, suppresses grid harmonics and three-phase unbalance, and comprehensively improves regional power supply quality.
Power Grid Fault Isolation & Safety Protection: It effectively isolates the upper 10kV medium-voltage main grid and lower 400V low-voltage load system, preventing high-voltage fault surges from spreading to the user side, limiting grid fault scope and reducing terminal equipment damage risks.
Long-term Full-load Power Guarantee: Relying on excellent heat dissipation performance and overload resistance, the 500kVA oil immersed transformer supports long-term 24-hour uninterrupted full-load operation, meeting stable power demand for medium-scale industrial production and municipal public facilities.
5. Wide Application Scenarios
With stable performance, medium-large load capacity and strong environmental adaptability, the 500kva 10kv 400v Oil Immersed Transformer Electrical Transformers are widely applied in municipal, industrial, commercial and infrastructure power distribution projects worldwide:
5.1 Urban & Township Power Grid Renovation
This 500kVA 10kV/400V oil immersed transformer is the mainstream equipment for urban suburban grid upgrading and township centralized power supply. It effectively solves the problems of insufficient power supply capacity and unstable voltage of old power grids, improving the power carrying capacity and power supply reliability of regional power distribution networks.
5.2 Medium-sized Industrial Park Power Supply
Widely used in light industrial parks, small and medium-sized manufacturing bases, food processing factories and mechanical processing plants. The 500kVA medium capacity fully meets the long-term continuous power demand of medium-scale production lines and auxiliary electrical equipment, ensuring stable industrial production power supply.
5.3 Municipal & Large Public Facilities
Suitable for power distribution of urban community clusters, schools, hospitals, scenic areas and large public service facilities. Its low-noise and stable operation will not affect public living and working environments, fully meeting the power supply standards of municipal public infrastructure projects.
5.4 New Energy Supporting Power Distribution
Applicable for supporting power transformation of distributed photovoltaic power stations, small wind power generation systems and rural new energy power supply projects. The stable voltage conversion performance ensures smooth grid connection and power balancing for new energy power generation systems.
5.5 Large Construction & Temporary Power Projects
With strong outdoor weather resistance and convenient installation, this oil immersed electrical transformer is commonly used for long-term temporary power guarantee of large construction sites, road engineering and municipal key projects, providing reliable stable power support for field engineering operation.
6. Frequently Asked Questions (FAQ)
Q1: What are the core advantages of 500kVA 10kV/400V oil immersed transformer for industrial power distribution?
This medium-capacity oil immersed electrical transformer is tailor-made for 10kV municipal and industrial power grids. Compared with small-capacity transformers, it has stronger load bearing capacity and short-term overload tolerance, fully adapting to medium-scale industrial continuous power consumption. Different from dry-type transformers, the oil immersed cooling system provides better heat dissipation effect under long-term full-load operation, with lower failure rate and wider outdoor adaptability. Meanwhile, the standardized 10kV to 400V voltage ratio matches most global power grid standards, featuring strong versatility and high cost performance for industrial and grid projects.
Q2: What is the difference between Dyn11 and Yyn0 vector groups for this 500kVA transformer?
The two vector groups apply to different power supply scenarios. The Dyn11 vector group has strong ability to suppress three-phase unbalanced load and harmonic interference, with low zero-sequence impedance, which is more suitable for industrial park power supply, new energy grid connection and scenarios with high power quality requirements. The Yyn0 vector group features simple structure and stable voltage output, perfectly adapting to conventional municipal power grids, residential cluster power supply and general public facility power distribution. We can configure the vector group freely according to customers’ on-site grid conditions.
Q3: How to maintain the 500kva 10kv 400v oil immersed electrical transformer in daily operation?
This fully sealed oil immersed transformer belongs to low-maintenance power equipment. In daily use, users only need to regularly check the oil tank sealing condition to prevent insulating oil leakage, clean the radiator surface dust to ensure unobstructed heat dissipation, and monitor three-phase voltage and current balance status. Avoid long-term overloaded operation to prevent insulation aging. It is recommended to conduct a comprehensive insulating oil quality test and internal performance inspection every 2 to 3 years. With standardized operation and simple maintenance, the equipment can achieve a 25-year stable service life, greatly reducing long-term replacement and maintenance costs.
