3 Phase 10kv 440v Transformer Electricity 125kva 160kva 200kva Class Oil Immersed Transformer
3 Phase 10kv 440v Transformer Electricity 125kva 160kva 200kva Class Oil Immersed Transformer
1. Product Description
The 3 Phase 10kv 440v Transformer Electricity 125kva 160kva 200kva Class Oil Immersed Transformer is a standard medium-voltage three-phase oil-filled distribution transformer designed for industrial and municipal power conversion projects. Belonging to the professional 10kV class oil immersed transformer series, this electrical power transformer features a fixed high voltage input of 10kV and low voltage output of 440V three-phase power, covering three practical rated capacities including 125kVA, 160kVA and 200kVA to fit small and medium-load power distribution demands. Fully manufactured and tested in compliance with IEC and ANSI international electrical standards, this low-loss oil immersed power equipment supports stable operation for both 50Hz and 60Hz global power grid systems, serving as a reliable voltage conversion unit for industrial facilities and public power networks.
This three-phase 10kV to 440V oil immersed transformer adopts high-permeability grain-oriented cold-rolled silicon steel core and full copper winding structure, effectively reducing no-load current and operational power loss during long-term continuous running. It applies mature ONAN oil natural air natural self-cooling technology and fully sealed corrugated tank design, using high-purity insulating oil to realize internal insulation and circulating heat dissipation without auxiliary cooling equipment. Optimized with standard Dyn11 vector group configuration, the transformer delivers balanced three-phase voltage output, low partial discharge and minimal operating noise. All capacity models of 125kVA, 160kVA and 200kVA adopt unified modular manufacturing standards, ensuring consistent structural stability, installation compatibility and field adaptability for indoor and outdoor power distribution environments.
2. Core Purpose
The core purpose of the 10kV class 3 phase 440V oil immersed transformer is to achieve safe, stable and energy-efficient step-down conversion from 10kV medium-voltage grid power to standard 440V three-phase industrial electricity. It solves the common voltage mismatch issue between public 10kV high-voltage distribution networks and industrial mechanical equipment, commercial electrical systems and factory power loads that require 440V operating voltage. With graded capacity options from 125kVA to 200kVA, this oil immersed distribution transformer provides flexible power matching for different load scales, avoiding insufficient power supply margin or redundant capacity waste in actual engineering applications.
Beyond basic voltage transformation, this industrial electrical transformer undertakes critical power quality regulation and grid stabilization functions in daily operation. It effectively balances three-phase current distribution, suppresses terminal voltage fluctuation caused by load switching, and filters minor harmonic interference generated by industrial frequency conversion equipment. The sealed oil cooling structure ensures consistent heat dissipation performance under continuous full-load and short-term overload conditions, lowering long-term operating temperature rise and extending equipment service life. By stabilizing 440V low-voltage output, it protects downstream electrical devices from overvoltage and undervoltage damage, improving the overall safety and efficiency of regional power distribution systems.
3. Application Scenarios
3.1 Small and Medium Industrial Factory Power Distribution
This 3 Phase 10kv 440v Class Oil Immersed Transformer is widely deployed in small manufacturing factories, mechanical processing workshops, packaging plants and light industrial production bases. Most industrial mechanical equipment, motors and production lines in these facilities are designed for 440V three-phase power supply, while the municipal power grid only provides 10kV medium-voltage power input. The 125kVA, 160kVA and 200kVA capacity models perfectly match the daily power consumption of small and medium industrial loads, steadily converting grid high voltage to usable 440V industrial power to support continuous production operation.
3.2 Commercial Complex and Public Facilities Power Supply
It is commonly used for power distribution support of large shopping malls, comprehensive commercial buildings, logistics parks and public service facilities. These sites feature mixed three-phase and single-phase loads, with centralized power demand for central air conditioning, mechanical ventilation equipment and power distribution cabinets. This 10kV to 440V oil immersed transformer provides stable low-voltage power output, ensuring the normal operation of commercial electromechanical systems and building power distribution equipment, and adapting to long-term unattended operation of public infrastructure.
3.3 Urban and Rural Power Grid Renovation Projects
In rural power grid upgrading, suburban community power optimization and old urban grid renovation work, this medium-capacity oil immersed distribution transformer acts as core terminal power conversion equipment. It converts 10kV overhead line high voltage into standard 440V low-voltage power for regional industrial and commercial use, solving the problems of unstable terminal voltage and low power supply capacity of old power grids. Its fully sealed outdoor structure adapts outdoor pole-mounted and platform-mounted installation, greatly improving the power supply reliability of urban and rural grassroots power distribution networks.
3.4 Distributed Energy and Auxiliary Power Projects
The transformer is also applicable to supporting power distribution of small distributed photovoltaic power stations, factory energy storage systems and standby generator sets. It can cooperate with power generation and energy storage equipment to complete secondary voltage regulation and power distribution, stabilize 440V terminal power quality, and provide reliable power guarantee for peak load supplement and emergency standby power scenarios in industrial parks.
4. Product Features
4.1 Multi-Capacity Gradient Design, Flexible Load Matching
This 10kV class oil immersed electrical transformer comes with three mainstream capacity specifications of 125kva, 160kva and 200kva, covering all common small and medium industrial power distribution scenarios. Users can select the most suitable model according to actual average load, peak power consumption and future capacity expansion plans. The graded capacity design realizes precise load matching, effectively avoiding long-term full-load operation of undersized transformers and energy waste caused by oversized equipment, delivering higher practical flexibility for engineering design and on-site deployment.
4.2 Low-Loss Electromagnetic Design, Energy Saving and Cost Effective
Adopting high-quality low-loss silicon steel core and optimized magnetic circuit structure, this three-phase 10kV/440V transformer greatly reduces no-load loss and no-load current compared with traditional ordinary transformers. The full copper winding structure features lower resistivity and better electrical conductivity, minimizing load loss during long-term operation. The overall energy efficiency fully meets international energy-saving standards, effectively reducing daily power consumption and long-term operation costs for industrial and grid users, with outstanding energy-saving and emission-reduction effects.
4.3 Fully Sealed Oil Immersed Structure, High Stability and Low Maintenance
Built with fully sealed welded corrugated steel tank, this oil immersed power transformer completely isolates internal insulating oil from external air, moisture and dust, preventing oil emulsification, oxidation and insulation aging. The natural circulating oil cooling system ensures uniform heat dissipation and low operating temperature rise, supporting long-term full-load and intermittent overload operation. Different from open-type transformers, this maintenance-free structure requires no frequent oil replacement, greatly reducing daily inspection and maintenance workload, and adapting to long-term outdoor unattended operation.
4.4 Excellent Power Quality and Strong Fault Resistance
Equipped with standard Dyn11 connection group, the transformer effectively suppresses three-phase current imbalance and grid harmonic pollution, improving the stability of 440V low-voltage output. The reinforced multi-layer composite insulation structure enhances lightning impulse resistance and short-circuit impact resistance, avoiding coil deformation and insulation damage caused by sudden grid faults. Built-in overvoltage, overcurrent and short-circuit protection mechanisms ensure rapid fault isolation, protecting both the transformer body and downstream electrical equipment safely.
4.5 Strong Environmental Adaptability and Long Service Life
The external tank adopts weather-resistant anti-corrosion coating, with excellent rainproof, dustproof and windproof performance, adapting to harsh outdoor environments with temperature ranging from -25℃ to +50℃. The whole machine features compact structure, low operating noise and stable mechanical performance, with a designed service life of more than 30 years under standard operating conditions. It supports multiple installation methods including pole mounting and ground mounting, bringing high convenience and comprehensive cost performance for various power distribution projects.
5. Frequently Asked Questions (FAQ)
5.1 What are the main application scenarios for this 10kV 440V oil immersed transformer?
This 3 Phase 10kv 440v Oil Immersed Transformer is specially designed for scenarios that require converting 10kV medium-voltage grid power to 440V three-phase industrial power. It is mainly used for power distribution in small and medium-sized industrial factories, light manufacturing workshops and commercial facilities, as well as terminal voltage conversion for urban and rural power grid renovation. It is also widely applied in supporting power distribution of small distributed energy projects and outdoor public infrastructure power supply, ideal for all small and medium-load 440V industrial power consumption scenarios.
5.2 How to choose between 125kva, 160kva and 200kva capacity models?
Capacity selection depends on actual operating load and future expansion requirements. The 125kVA model is suitable for small workshops and facilities with stable low industrial load and small peak-valley difference. The 160kVA model is the most universal specification, applicable to most standard medium-load industrial and commercial power distribution scenarios. The 200kVA high-capacity model is recommended for sites with large peak power consumption and reserved equipment expansion plans. It is always suggested to reserve 10%–20% load margin to avoid long-term full-load operation and extend transformer service life.
5.3 Does this fully sealed oil immersed transformer need regular oil maintenance?
This 10kV class fully sealed oil immersed transformer requires minimal routine maintenance. The closed welded tank structure prevents external moisture and dust intrusion, keeping internal high-purity insulating oil stable for a long time. Daily operation only needs simple visual inspection of oil temperature, running noise and tank anti-corrosion condition. Professional oil quality sampling test is only required every 3 to 5 years, and oil replacement is only needed when insulation performance fails to meet standards. Compared with traditional open-type transformers, it greatly reduces long-term maintenance costs and equipment downtime risks.
