10kv 220v Three-Phase Oil Immersed Transformers 440v Output 69kv Input Voltage 50/60Hz
10kv 220v Three-Phase Oil Immersed Transformers 440v Output 69kv Input Voltage 50/60Hz
1. Product Description
The 69kv input multi-output three-phase oil immersed transformer is a professional industrial and utility-grade power distribution device engineered for global dual-frequency power systems, supporting both 50Hz and 60Hz operating standards. This high-performance oil filled power transformer features a high 69kv primary input voltage, with flexible multi-stage output options including 10kv medium voltage, 440V three-phase industrial voltage and 220V single-phase civilian voltage, solving the graded voltage conversion needs of high-voltage grid transmission, industrial equipment operation and residential power supply in one single unit. Manufactured in full compliance with IEC and international power industry standards, this three-phase oil immersed transformer adopts mature industrial production technology, serving as a versatile and reliable core device for medium and high voltage power distribution projects worldwide.
Built with high-quality low-loss grain-oriented silicon steel core and full oxygen-free copper winding, this 69kv high voltage oil immersed power transformer effectively minimizes no-load loss, load loss and magnetic flux leakage during long-term continuous full-load operation. It adopts a proven ONAN oil natural air natural cooling system and fully sealed corrugated oil tank structure, using high-purity insulating oil to realize dual functions of internal electrical insulation and circulating heat dissipation. Unlike conventional single-voltage transformers that only support fixed voltage conversion, this multi-functional unit integrates 69kv high-voltage step-down, 10kv secondary power transmission, 440V industrial power output and 220V household power supply, with stable parameter performance and strong grid adaptability for both 50Hz and 60Hz AC power environments.
2. Core Uses
This three-phase oil immersed transformer mainly undertakes precise multi-stage voltage stepping and hierarchical power distribution for 69kv ultra-high voltage main grids. Its core operational function is to convert 69kv high-voltage grid power into stable 10kv medium voltage for regional secondary power transmission and grid shunting, while further decomposing power into standard 440V three-phase power for industrial heavy-load equipment and 220V low voltage for civilian daily power consumption. It effectively makes up for the functional defects of traditional single-output transformers, avoiding redundant equipment configuration and improving the overall efficiency of medium and high voltage power distribution systems.
In daily grid operation and industrial power supply scenarios, the 50/60Hz dual-frequency oil immersed distribution transformer also delivers critical power quality optimization and grid protection functions. It can automatically balance three-phase load distribution, suppress voltage surge and line voltage drop caused by long-distance power transmission and peak load fluctuations, and stabilize the output quality of 10kv, 440V and 220V voltage loops. The low-energy structural design reduces long-term power transmission loss, lowers operational energy consumption of power grids and industrial systems, and provides reliable overcurrent, overvoltage and short-circuit protection for downstream power distribution equipment and terminal electrical devices.
3. Application Scenarios
3.1 Regional High-Voltage Substation Power Distribution
This 69kv input three-phase oil immersed transformer is widely deployed in urban hub substations, regional power distribution centers and suburban high-voltage grid renovation projects. Most large-scale regional power transmission systems adopt 69kv high-voltage main grid standards, requiring graded voltage conversion for subsequent power supply. The 10kv medium-voltage output supports long-distance secondary power transmission to surrounding industrial zones and township grids, while 440V and 220V dual low-voltage outputs meet local industrial production and residential living power needs. The dual 50Hz and 60Hz frequency compatibility allows it to adapt to different regional grid specifications, suitable for large-scale grid construction and upgrading projects.
3.2 Heavy Industrial Park Power Supply
It is the preferred power transformation equipment for mining bases, metallurgical industrial parks, chemical manufacturing zones and large mechanical processing factories. These heavy industrial scenarios require high-capacity 69kv grid access to support continuous high-load operation. The 10kv output is used for internal plant partition power distribution and secondary transformation, the 440V three-phase output perfectly matches the operating voltage of heavy-duty motors, automated production lines and large industrial machinery, and the 220V output provides stable power for factory office areas, living facilities and on-site monitoring systems. It adapts to long-term high-load operation and frequent load fluctuations in industrial environments.
3.3 Global Overseas Power Engineering Projects
Thanks to its universal 50/60Hz dual-frequency design and multi-voltage matching capability, this oil immersed power transformer is highly suitable for overseas power engineering contracting and cross-regional grid construction. It can operate stably in 60Hz high-voltage grid systems prevalent in North America, Southeast Asia and Oceania, as well as 50Hz conventional grid systems in Europe, Africa and Asia. The flexible 10kv, 440V and 220V multi-output design can meet diversified power demand standards of different countries, making it a mainstream customized power device for overseas industrial and municipal power supply projects.
3.4 New Energy Power Station Grid Connection
In large-scale centralized photovoltaic power stations, wind power bases and energy storage power station projects, this multi-voltage oil immersed transformer serves as a key grid-connected conversion unit. It converts high-voltage electric energy generated by new energy equipment into 10kv medium voltage for 69kv main grid-connected transmission, while outputting 440V and 220V stable power for power station auxiliary equipment, intelligent monitoring systems and on-site maintenance facilities. Its strong anti-interference ability effectively optimizes new energy grid-connected power quality and ensures stable and safe operation of intermittent new energy power systems.
4. Product Features
4.1 69kv High-Voltage Input & Multi-Grade Flexible Output
Different from conventional medium and low voltage distribution transformers, this three-phase oil immersed transformer adopts professional 69kv high-voltage input design, matching large-scale high-capacity power grid transmission standards. It integrates three practical voltage outputs of 10kv medium transmission voltage, 440V industrial three-phase voltage and 220V civilian single-phase voltage, realizing three-level voltage step-down in one integrated device. The voltage conversion precision is high with tiny output fluctuation, which can fully cover regional power grid transmission, industrial heavy-load power supply and residential daily power consumption scenarios, greatly improving equipment utilization rate and reducing project procurement costs.
4.2 50/60Hz Dual-Frequency Global Universal Adaptability
Optimized for global mainstream power frequency standards, this oil immersed power transformer supports stable operation under both 50Hz and 60Hz AC power systems without manual parameter adjustment or structural modification. The internal core magnetic circuit and winding parameters are precisely calibrated for dual-frequency working conditions, with no abnormal heat generation, magnetic saturation or power efficiency attenuation during frequency switching. It has excellent grid compatibility, adapting to most municipal and industrial power grid standards around the world, and is ideal for cross-regional power engineering and equipment replacement projects.
4.3 Low-Loss Energy-Saving & High Operational Reliability
Adopting high-permeability low-loss silicon steel core and high-conductivity oxygen-free copper winding, the transformer optimizes internal magnetic circuit and winding layout, effectively reducing no-load loss, load loss and magnetic flux leakage loss. Compared with traditional old-fashioned high-voltage transformers of the same specification, the overall power transmission efficiency is significantly improved. It can maintain stable operation under long-term full-load and variable-load conditions, resist instantaneous short-circuit impact and peak load surge, and effectively reduce long-term power consumption and grid line loss, meeting the energy-saving and low-consumption requirements of modern smart power grids.
4.4 Fully Sealed Oil Immersed Structure & Maintenance-Free Operation
The whole machine adopts an integrated fully sealed corrugated oil tank and vacuum pressure oil injection process, completely isolating internal insulating oil from external air, dust and moisture. It effectively prevents insulating oil oxidation, emulsification and internal insulation aging, realizing long-term maintenance-free operation. The mature ONAN natural circulating cooling system ensures uniform and efficient heat dissipation, quickly exporting heat generated by high-load operation. The overall structural design avoids oil leakage and insulation failure, with low daily failure rate and long service life.
4.5 Strong Environmental Adaptability & Wide Application Range
The transformer shell undergoes professional anti-corrosion, rust-proof and weather-resistant coating treatment, adapting to indoor closed substations and outdoor open-air installation environments. It can operate stably in high temperature, low temperature, humid, dusty and other harsh working conditions. With strong overload resistance and electromagnetic anti-interference ability, it can cope with complex grid fluctuation and variable load operation, suitable for industrial parks, municipal substations, new energy power stations and overseas engineering projects with diverse working conditions.
5. Frequently Asked Questions (FAQ)
5.1 What are the specific application differences between 10kv, 440V and 220V outputs?
Each voltage output targets independent professional power supply scenarios. The 10kv medium-voltage output is mainly used for regional long-distance power transmission and substation secondary power distribution, which can effectively reduce high-voltage line transmission loss and improve grid power supply radius. The 440V three-phase output is dedicated to large industrial motors, automated production lines and heavy mechanical equipment, matching global industrial standard voltage requirements. The 220V single-phase output is applied to residential power supply, office equipment, lighting systems and municipal public facilities for daily civilian power consumption. The multi-output design realizes one machine for multi-scenario use, saving installation space and equipment investment.
5.2 Does switching between 50Hz and 60Hz operating frequency affect transformer performance?
No frequency switching impact on performance and service life will occur. This three-phase oil immersed transformer is professionally optimized and factory tested for dual 50Hz and 60Hz operation. All internal electrical parameters, core magnetic circuit structure and heat dissipation systems are adapted to dual-frequency working conditions. Whether operating steadily under single frequency or switching between two frequencies, the equipment maintains stable voltage conversion accuracy, low loss performance and heat dissipation efficiency, without overheating, voltage deviation or efficiency drop. It can fully adapt to different global grid frequency standards.
5.3 Is this 69kv high-voltage transformer suitable for long-term outdoor unattended operation?
Absolutely suitable for long-term outdoor unattended operation. This high-voltage oil immersed transformer adopts a fully sealed anti-aging structural design, with excellent waterproof, dustproof and moisture-proof performance. The sealed oil tank completely isolates internal components from external harsh environments, preventing insulation aging and oil deterioration. The weather-resistant shell can resist extreme temperature changes, strong wind and rain erosion. With maintenance-free operation and strong short-circuit resistance, it requires only regular routine external inspection, which is very suitable for outdoor municipal substations, remote new energy power stations and unattended industrial power distribution stations.
