35kV 400V 125kVA 160kVA 200kVA Oil Immersed Distribution Transformers
1. Product Description
35kV 400V 125kVA 160kVA 200kVA oil immersed distribution transformers are high-performance three-phase power conversion equipment tailored for medium and low voltage power distribution systems. As mainstream medium-capacity oil-filled power transformers in the power industry, this series of transformers features a standard high voltage rating of 35kV and a low voltage output of 400V, covering three mainstream rated capacities of 125kVA, 160kVA and 200kVA to meet diversified power supply demands of different load scenarios. Adopting mature oil-immersed cooling and insulation technology, the equipment takes high-purity mineral insulating oil or biodegradable environmental protection oil as the cooling and insulating medium, which fully wraps the iron core and windings inside a sealed steel tank to achieve stable voltage transformation and electric energy transmission.
Manufactured in strict accordance with international IEC standards and national power industry specifications, the transformer adopts low-loss cold-rolled silicon steel sheets and optimized winding structure design. The common vector group is Dyn11, with a rated operating frequency of 50Hz and a standard short-circuit impedance of 6.5%, supporting a high-voltage tap adjustment range of ±2×2.5% to adapt to fluctuating grid voltage conditions. This series of sealed oil immersed distribution transformers undergoes vacuum drying and full oil filling treatment in the production process, effectively eliminating internal air and moisture, avoiding insulation aging, and ensuring long-term stable operation in complex outdoor and industrial environments. Compared with traditional ordinary distribution transformers, it has more accurate parameter matching and stronger operational stability in medium-voltage distribution networks.
2. Core Purpose
The core purpose of 35kV 400V medium-capacity oil immersed distribution transformers is to realize safe, efficient and stable voltage conversion and power distribution in regional power grids. It mainly undertakes the task of stepping down 35kV medium-voltage industrial power to 400V low-voltage civil and industrial usable power, forming a key link connecting medium-voltage transmission lines and terminal power consumption equipment. For 125kVA, 160kVA and 200kVA capacity models with graded power carrying capacity, they can precisely match different power load levels, solve the problems of unstable voltage and insufficient power supply in terminal power consumption, and optimize the power distribution efficiency of regional power grids.
In addition to basic voltage transformation and power distribution functions, this energy-saving oil immersed transformer also undertakes grid load regulation and power quality optimization tasks. It can effectively suppress grid voltage fluctuation, reduce line power loss, and ensure the continuity and stability of power supply for terminal equipment. As a key equipment for urban and rural power grid upgrading and industrial power distribution renovation, it also plays an important role in balancing regional power load, improving the utilization rate of electric energy, and reducing the operating cost of power grids, which is indispensable for safe and economical operation of medium and low voltage power distribution systems.
3. Application Scenarios
3.1 Urban and Rural Civil Power Distribution
35kV 400V 125kVA 160kVA 200kVA oil immersed distribution transformers are widely used in urban residential communities, rural centralized power supply areas, towns and street power distribution stations. The 125kVA and 160kVA models are suitable for small and medium-sized residential blocks and rural village-level power supply scenarios with relatively concentrated household loads, while the 200kVA high-capacity model can meet the power demand of densely populated residential areas and supporting community commercial facilities. The equipment adapts to outdoor open-air installation conditions, can resist conventional temperature changes and environmental erosion, and provides stable low-voltage power guarantee for daily household electricity, lighting and small civil electrical equipment.
3.2 Industrial and Mining Enterprise Power Supply
This series of heavy-duty oil immersed transformers is applicable to small and medium-sized processing factories, mining enterprises, construction sites and light industrial production workshops. Industrial production equipment and construction machinery have certain instantaneous startup load and continuous operating power consumption, and the three capacity specifications of 125kVA, 160kVA and 200kVA can flexibly match the power demand of different-scale light industrial production and temporary construction power consumption. The equipment has strong overload resistance and stable voltage output capacity, which can avoid equipment failure and production shutdown caused by voltage instability, and ensure the continuous operation of industrial production lines and construction equipment.
3.3 New Energy and Public Infrastructure
With the rapid development of new energy power generation, this reliable 35kV distribution transformer is also widely used in distributed photovoltaic power stations, small wind power generation projects and energy storage supporting power distribution systems. It is responsible for converting the generated electric energy into standard 400V low-voltage electricity for grid connection or local consumption. At the same time, it is also applied to public infrastructure such as suburban highway service areas, park scenic spots, school campuses and hospital power distribution rooms, providing safe and stable power support for public service facilities and new energy terminal power consumption scenarios.
4. Product Features
4.1 Excellent Energy-Saving and Low-Loss Performance
This high-efficiency oil immersed distribution transformer adopts high-quality low-loss silicon steel sheets and electromagnetic optimization design, which greatly reduces no-load loss and load loss during operation. Compared with traditional old-fashioned transformers of the same capacity, the no-load current is significantly reduced, and the overall operating efficiency is effectively improved. The graded capacity design of 125kVA, 160kVA and 200kVA avoids the energy waste caused by mismatched load and transformer capacity, realizing energy-saving and low-consumption operation throughout the whole life cycle, and meeting the current industry's energy-saving and emission-reduction requirements for power equipment.
4.2 High Operational Stability and Safety
The product adopts a fully sealed steel tank structure and advanced vacuum oil-filling process, which completely isolates the internal insulating oil and windings from the external air, prevents insulation aging and oil deterioration, and effectively extends the service life of the equipment. The matched high-strength insulating materials have excellent heat resistance and pressure resistance, and can operate stably in the temperature range of -20℃ to +40℃. With a reasonable short-circuit impedance design and perfect over-current and over-voltage protection performance, it can resist instantaneous overload and short-circuit impact, reduce the failure rate of power supply, and ensure the safe operation of medium and low voltage power distribution systems.
4.3 Strong Environmental Adaptability and Low Noise
Designed for outdoor and complex working conditions, the shell of the 35kV 400V oil immersed transformer has excellent anti-corrosion, rain-proof and dust-proof properties, adapting to harsh environments such as suburban open air, industrial sites and rural areas. The optimized core and winding structure effectively suppresses electromagnetic vibration and operating noise, achieving ultra-low noise operation during rated load operation, which will not cause noise pollution to the surrounding living and production environment. In addition, the optional biodegradable insulating oil makes the equipment more environmentally friendly and meets the green power construction standards.
4.4 Flexible Specification Matching and Easy Maintenance
Covering three mainstream capacities of 125kVA, 160kVA and 200kVA, the product can flexibly adapt to different load demands of civil, industrial and new energy scenarios, with complete and standardized parameter specifications and strong universality. The fully sealed structure reduces the frequency of daily maintenance, avoiding the troubles of frequent oil inspection and dust cleaning required by traditional transformers. The simple and reasonable structural design facilitates later equipment inspection, oil replacement and fault maintenance, greatly reducing the daily operation and maintenance cost of power grid enterprises and users.
