250kVA 10kV 400V Oil Immersed Transformer Electrical Transformers
250kVA 10kV 400V Oil Immersed Transformer Electrical Transformers Product Description
1. Product Overview
The 250kVA 10kV 400V Oil Immersed Transformer Electrical Transformer is a high-efficiency, reliable medium-to-low voltage step-down power transformation equipment designed in accordance with IEC and national power industry standards. This three-phase oil immersed distribution transformer is engineered for conventional power grid systems with a 10kV high-voltage input and a standard 400V low-voltage output, providing stable and safe voltage conversion for residential, commercial, and industrial power distribution systems.
Adopting classic oil-immersed cooling and insulating technology, the 250kVA 10kV to 400V transformer uses high-purity transformer oil as the medium for heat dissipation and electrical insulation. Equipped with high-quality silicon steel sheet core and high-conductivity windings, the equipment features low power loss, stable output voltage, and strong overload resistance. It supports long-term continuous full-load operation and serves as essential electrical transformers for medium and small-scale power distribution projects worldwide.
2. Core Technical Specifications
This 10kV 400V oil immersed transformer adopts standardized industrial design with mature and stable parameters, fully adapting to conventional civil and industrial power grid operation requirements:
• Rated Capacity: 250kVA, perfectly matching small and medium power load demand
• Rated Voltage Ratio: 10kV (High Voltage) / 400V (Low Voltage)
• Phase Type: Three-phase AC power conversion
• Cooling Mode: ONAN (Oil Natural Air Natural) self-cooling system
• Working Frequency: 50Hz/60Hz universal for global power grids
• Connection Group: Dyn11, featuring low zero-sequence current and strong anti-harmonic ability
• Insulation Performance: High-grade insulation structure, excellent lightning impulse and breakdown resistance
• Operating Efficiency: Ultra-low no-load and load loss, full-load efficiency exceeding 98%
3. Core Product Purposes
As a professional 250kVA oil immersed electrical transformer, the core purpose of the equipment is to realize safe and efficient voltage conversion and power distribution in medium and low voltage power grids. It converts 10kV high-voltage electric energy from overhead transmission lines into 400V low-voltage industrial and civilian standard electricity, solving the voltage mismatch between high-voltage power transmission and terminal power consumption equipment.
In addition, this 10kV to 400V distribution transformer undertakes grid load balancing and power supply stabilization functions. It can effectively balance three-phase load pressure, suppress grid voltage fluctuation, and ensure continuous and stable power output for terminal electrical equipment. It effectively avoids equipment damage and power supply failure caused by unstable voltage, providing basic and reliable power guarantee for various power consumption scenarios.
4. Application Scenarios
The 250kVA 10kV 400V oil immersed transformer boasts strong environmental adaptability and moderate load capacity, making it widely applicable in various small and medium-scale power supply and distribution scenarios:
4.1 Residential & Community Power Supply
It is the mainstream power distribution equipment for urban and rural residential communities, villa areas and rural centralized power supply stations. It provides stable 400V low-voltage power for household lighting, electrical equipment and community public facilities, meeting the daily power consumption needs of residential areas.
4.2 Small-Scale Industrial Scenarios
Suitable for small processing factories, workshop production lines, light industry manufacturing enterprises and individual industrial and commercial power consumption places. It can stably supply power for small motors, mechanical equipment and production auxiliary electrical devices, adapting to long-term continuous operation of small industrial loads.
4.3 Commercial & Public Facilities
Widely used in schools, hospitals, supermarkets, small shopping malls, office buildings and other public and commercial buildings. It supports the normal operation of building air conditioning, lighting, elevators and daily office electrical equipment, ensuring stable power supply for public service and commercial operation.
4.4 Municipal & Infrastructure Projects
Applicable to urban and rural power grid renovation projects, road auxiliary facilities, scenic area supporting power supply, water pump stations and other municipal infrastructure. The oil-immersed outdoor design adapts to complex outdoor environments and meets the power demand of municipal basic facilities.
5. Core Product Features
5.1 Low Energy Consumption & High Efficiency
This electrical transformer adopts high-quality oriented silicon steel sheet core and high-purity copper windings, which greatly reduces no-load loss and magnetic leakage loss. The optimized winding structure improves power transmission efficiency, realizing energy-saving and low-consumption operation. It effectively reduces long-term operating electricity costs for users and meets international energy-saving standards.
5.2 Excellent Insulation & Safety Performance
The fully sealed oil-immersed structure isolates internal electrical components from external humid air, dust and corrosive substances. The high-performance transformer oil has excellent heat dissipation, insulation and arc-extinguishing capabilities, which can quickly dissipate operating heat and prevent overheating, short circuit and insulation breakdown faults. With strong lightning resistance and overload resistance, the equipment ensures safe and stable long-term operation.
5.3 Stable Operation & Strong Adaptability
Designed with a scientific three-phase balance structure, the 250kVA 10kV transformer outputs balanced three-phase voltage with small fluctuation and strong anti-interference ability. It supports 50/60Hz dual-frequency operation, adapting to power grid standards in most countries and regions. It can operate stably in high temperature, low temperature and humid environments, with strong environmental adaptability.
5.4 Low Maintenance & Long Service Life
The ONAN natural cooling structure has no vulnerable rotating parts, with low failure rate and stable performance. The overall shell adopts anti-corrosion and rust-proof coating treatment, which effectively resists outdoor wind and rain erosion. The fully sealed oil tank prevents insulating oil deterioration and leakage, greatly reducing daily maintenance workload and maintenance costs, with a service life of up to 20 years or more.
5.5 Compact Structure & Easy Installation
The transformer adopts an integrated compact design with reasonable internal layout, small floor area and light weight. It supports multiple installation methods such as pole-mounted and ground-mounted installation. The equipment is easy to transport, hoist and debug on site, which can quickly complete grid connection and put into operation, greatly improving the construction efficiency of power distribution projects.
