10kv Three-Phase Oil Immersed Transformers 35kv Input 440v Output 50/60Hz
10kv Three-Phase Oil Immersed Transformers 35kv Input 440v Output 50/60Hz
1. Product Description
The 10kv Three-Phase Oil Immersed Transformers with 35kv input and 440v output supporting 50Hz and 60Hz dual frequency operation is a professional medium-voltage step-down power distribution device compliant with IEC and IEEE international power standards. This heavy-duty three-phase oil filled transformer is designed for global industrial and municipal power grid systems, featuring dual high-voltage grade compatibility of 10kV and 35kV, which can adapt to different medium-voltage power access standards in various regions. With a standardized low-voltage output of 440V, it perfectly matches the operating voltage of large industrial three-phase electrical equipment, filling the gap of stable power conversion for high-power industrial loads.
Adopting mature ONAN oil natural air natural cooling technology and fully sealed welded steel tank structure, this 35kv to 440v step down oil immersed transformer delivers excellent insulation performance and continuous operation stability. The internal core adopts high-quality low-loss silicon steel sheets, paired with high-purity copper three-phase windings, which effectively reduces no-load loss and load loss during long-term operation. Different from single-frequency transformers on the market, this model supports both 50Hz and 60Hz power system operation, covering mainstream power frequency standards in Asia, Europe, America and other regions, with extremely high universal applicability.
As a mainstream medium and high voltage distribution transformer, the equipment integrates overvoltage protection, short-circuit resistance and overload operation functions. The optimized three-phase winding balance design avoids current imbalance and voltage deviation, ensuring stable 440V low-voltage output under full-load and partial-load conditions. All products undergo strict factory withstand voltage testing and load debugging, with reliable structural stability, low failure rate, and full adaptability to long-term unattended outdoor and indoor power distribution operation scenarios.
2. Core Purpose
The core function of this 10kv/35kv dual-input three-phase oil immersed transformer is to complete safe and efficient medium-to-low voltage conversion in industrial and municipal power grids. It mainly steps down 10kV and 35kV medium and high voltage grid power into standard 440V three-phase industrial power, solving the voltage mismatch between high-voltage transmission lines and terminal industrial production equipment, and providing compliant and stable power guarantee for high-power electrical devices.
Beyond basic voltage step-down conversion, this 50/60Hz universal oil immersed power transformer undertakes key tasks of regional grid load balancing and power loss control. It can reasonably distribute power load according to actual on-site power consumption, effectively avoid local grid overload operation and idle power waste, and improve the overall operating efficiency of medium-voltage power distribution systems. Its dual-frequency compatible design eliminates the frequency adaptation barrier of cross-regional power equipment, realizing stable power supply switching for 50Hz and 60Hz grid systems.
In addition, the equipment acts as a critical safety isolation device in power systems. The high-performance insulating oil and fully sealed insulation structure completely isolate high-voltage and low-voltage circuits, effectively block high-voltage surge impact and electric leakage risks, protect terminal mechanical equipment and grid line safety, and ensure continuous and uninterrupted power supply for key industrial production and municipal power supply projects.
3. Application Scenarios
3.1 Heavy Industrial Production Sites
This 35kv input 440v output three-phase oil immersed transformer is widely used in heavy industrial scenarios such as machinery manufacturing plants, metallurgical factories, chemical plants, mining enterprises and processing workshops. These scenarios require long-term stable high-power three-phase power support, and the 440V low-voltage output is perfectly adapted to large motors, mechanical production lines, hydraulic equipment and industrial electrical systems. The 10kV and 35kV high-voltage access capacity meets the high-load power demand of industrial parks, and the oil-immersed heat dissipation structure can cope with continuous full-load operation of industrial equipment.
3.2 Municipal Power Grid & Substation Projects
It serves as core power distribution equipment for urban medium-voltage substations, rural power grid renovation projects and regional power distribution stations. For urban industrial zones and township centralized power supply areas with mixed industrial and public power loads, the dual-voltage input and dual-frequency adaptive design can flexibly match different grid standards. The equipment’s high safety and stability fully meet the strict operation requirements of municipal power systems, ensuring stable power supply for urban public facilities and industrial supporting electricity.
3.3 Large Commercial & Public Infrastructure
The transformer is applicable to large commercial complexes, logistics parks, airport supporting facilities, railway power distribution rooms, water supply and sewage treatment plants and other public infrastructure scenarios. These places have large power consumption and high requirements for power supply stability. The low-loss and anti-fluctuation performance of this 50/60Hz universal distribution transformer can effectively avoid equipment shutdown and operation failure caused by voltage instability, and guarantee the normal operation of public service and commercial supporting equipment.
3.4 Overseas Engineering & Cross-Regional Power Projects
Thanks to its 50Hz and 60Hz dual-frequency compatibility and 10kV/35kV universal voltage design, the equipment is the preferred power distribution device for overseas construction projects, cross-border industrial investment projects and foreign power grid renovation projects. It can adapt to different power frequency and voltage standards in various countries and regions, solving the problem of difficult equipment matching in overseas power engineering construction, and has strong global market adaptability.
4. Product Features
4.1 Dual-Voltage & Dual-Frequency Universal Compatibility
Different from single-specification transformers, this three-phase oil immersed transformer supports 10kV and 35kV dual high-voltage input, covering two mainstream medium-voltage grid levels. It is compatible with global 50Hz and 60Hz power frequency systems, eliminating equipment replacement troubles caused by grid frequency differences. The fixed 440V three-phase low-voltage output is highly matched with international industrial power consumption standards, realizing one machine for multiple scenarios and greatly improving equipment utilization rate.
4.2 Low Loss & High Operation Efficiency
Adopting high-grade oriented silicon steel sheet core and full copper winding structure, the equipment minimizes magnetic flux leakage and current loss. The optimized three-phase balance winding process makes phase current distribution uniform, with extremely low no-load loss and load loss. Compared with traditional old-fashioned transformers, this energy-saving oil immersed transformer can effectively reduce long-term operation power consumption, lower user’s electricity cost and grid operation loss, and has significant energy-saving and emission-reduction benefits.
4.3 Superior Environmental Adaptability & Durability
Equipped with a fully sealed anti-leakage oil tank and high-performance insulating mineral oil, the product has excellent waterproof, dustproof, moisture-proof and anti-corrosion capabilities. The outer shell adopts multi-layer anti-rust and anti-oxidation spraying technology, which can resist wind, sun, rain and harsh temperature changes. The ONAN natural cooling system operates stably without noise, ensuring uniform heat dissipation in high-temperature working environments. It can run continuously for a long time in outdoor open-air substations and dusty industrial workshops, with strong environmental tolerance.
4.4 High Safety & Stable Output Performance
This 35kv to 440v step down transformer is built with complete safety protection mechanisms, including overvoltage protection, overload protection and short-circuit rapid tripping functions. It can automatically cut off the circuit in case of abnormal grid voltage or equipment overload, effectively protecting terminal industrial equipment and power grid safety. The internal winding structure is stable and reliable, with extremely small voltage regulation rate, ensuring continuous and stable 440V output without fluctuation, and avoiding production equipment failure caused by voltage instability.
4.5 Easy Installation & Low Maintenance Cost
The overall structure is compact and standardized, supporting multiple installation methods such as indoor fixed installation and outdoor foundation installation. The wiring interface complies with international universal standards, with simple on-site debugging and fast construction progress. The fully sealed structure does not require frequent oil replacement and routine maintenance, greatly reducing later operation and maintenance costs. With a design service life of more than 20 years, it is a cost-effective medium-voltage power distribution device for long-term engineering operation.
5. FAQ (Frequently Asked Questions)
5.1 What is the applicable difference between 50Hz and 60Hz dual frequency of this transformer?
This 10kv three-phase oil immersed transformer is specially optimized for dual-frequency operation, which can perfectly adapt to 50Hz power systems in most Asian and European countries and 60Hz grid standards in North America, Southeast Asia and other regions. There is no difference in equipment performance and output stability under the two frequencies. The dual-frequency design mainly solves the problem of equipment incompatibility in cross-regional projects, enabling one device to be used in multiple national power grid environments without customized modification, which greatly improves the flexibility of engineering configuration.
5.2 What scenarios are suitable for 10kV and 35kV input voltage respectively?
The 10kV input mode is mostly applicable to urban industrial zones, township power grids and conventional municipal distribution stations with medium and low power load density, which meets the daily power supply demand of most small and medium-sized industrial enterprises. The 35kV high-voltage input is suitable for large industrial parks, mining areas, remote power supply projects and key industrial projects with high power consumption and long power supply lines. Users can switch the input voltage mode according to the local grid voltage level and actual load demand to ensure optimal operation efficiency.
5.3 Is the 440V output voltage suitable for conventional industrial three-phase equipment?
Absolutely yes. 440V three-phase voltage is a universal low-voltage standard for high-power industrial equipment in global industrial fields. This 35kv to 440v oil immersed step-down transformer outputs stable standard voltage, which is perfectly compatible with large industrial motors, automated production lines, industrial frequency conversion equipment and heavy mechanical devices. Compared with conventional 400V transformers, the 440V output can better adapt to high-load industrial operation scenarios, effectively avoiding equipment power shortage and insufficient starting power under long-term working conditions.
