200KVA 250KVA 315KVA 10KV/10.5KV 0.38KV/0.22KV Three Phase Oil Immersed Transformer
200KVA 250KVA 315KVA 10KV/10.5KV 0.38KV/0.22KV Three Phase Oil Immersed Transformer
1. Product Overview
The 200KVA, 250KVA and 315KVA 10KV/10.5KV to 0.38KV/0.22KV three phase oil immersed transformer is a widely used medium-voltage distribution transformer for civil, commercial and industrial power grid systems. Covering three mainstream rated capacities of 200KVA, 250KVA and 315KVA, this oil filled power transformer supports dual high input voltages of 10KV and 10.5KV, and can stably output standard 0.38KV three-phase industrial power and 0.22KV single-phase residential power, fully matching diverse terminal power consumption demands of modern power distribution projects.
Manufactured in accordance with IEC 60076 international standards and national power industry specifications, this low-loss oil immersed distribution transformer adopts high-grade cold-rolled silicon steel sheet core and high-purity copper winding structure. It features a fully sealed corrugated oil tank design and standard ONAN oil-natural air-natural cooling system, which effectively solves heat dissipation and insulation aging problems during long-term continuous operation. Compared with traditional old-fashioned transformers, this upgraded three-phase power transformer has lower no-load loss, smaller operating vibration and more stable voltage output, making it a preferred power transformation device for urban and rural power grid renovation and new construction projects.
This multi-specification oil immersed power transformer is designed for flexible power distribution scenarios. The optional 10KV and 10.5KV primary voltage adapts to different regional medium-voltage grid standards, while the dual secondary voltage of 0.38KV and 0.22KV can simultaneously supply power for industrial mechanical equipment, residential living electricity and commercial electrical facilities. With moderate capacity, compact structure and strong load adaptability, it perfectly fills the market demand for medium and small capacity high-efficiency power transformation equipment.
2. Core Product Uses
The core function of the 200KVA–315KVA 10KV/10.5KV oil immersed transformer is to complete safe and efficient voltage step-down, electric energy conversion and terminal power distribution in 10kV medium-voltage power grids, realizing accurate matching between medium-voltage transmission lines and low-voltage power consumption equipment.
Primarily, it undertakes the key voltage reduction task of regional power grids. The equipment steps down 10KV or 10.5KV medium-voltage grid power to standard 0.38KV three-phase AC power and 0.22KV single-phase AC power, providing compliant and stable power supply for industrial production, residential life and commercial operation. The multi-capacity and multi-voltage design allows users to select 200KVA, 250KVA or 315KVA models according to actual load size, avoiding equipment waste or insufficient power supply capacity, and greatly improving the refinement of power grid distribution.
In addition, this energy-saving oil immersed transformer effectively reduces electric energy loss during power conversion, stabilizes terminal grid voltage, and suppresses low-frequency voltage fluctuation and harmonic interference. It has excellent short-circuit resistance and overload tolerance, which can buffer instantaneous current impact caused by equipment startup and grid load changes, protect subsequent power distribution equipment and electrical appliances from damage, and improve the overall safety and stability of regional power supply systems. It also supports long-term unattended outdoor operation, reducing manual operation and maintenance pressure for power grid enterprises.
3. Typical Application Scenarios
3.1 Urban & Rural Power Grid Renovation Projects
This series of 10KV/10.5KV three phase oil immersed transformers is the core equipment for rural power grid upgrading, urban community power distribution and suburban grid reconstruction. Most urban and rural regional power grids adopt 10KV or 10.5KV overhead line power transmission, and the 200KVA, 250KVA and 315KVA medium and small capacity models are perfectly adapted to the decentralized power load characteristics of residential communities, rural villages and townships. The fully sealed outdoor design can resist wind, rain, high temperature and low temperature erosion, ensuring 24-hour stable power supply for residents’ daily electricity, domestic water pumping and community public facilities.
3.2 Small & Medium Industrial Factory Power Supply
It is widely applied in small processing workshops, light industrial factories, agricultural product processing plants and small mining enterprises. Most suburban industrial parks and independent factory areas access 10KV medium-voltage power grids, and this oil immersed distribution transformer can convert medium voltage to 0.38KV industrial power for production equipment, workshop transmission devices and mechanical facilities, while outputting 0.22KV voltage for factory office lighting and daily living electricity. The 315KVA high-capacity model is suitable for factories with slightly larger power load, while 200KVA and 250KVA models match conventional light industrial production needs, with high cost performance and flexible matching.
3.3 Commercial & Public Infrastructure Power Distribution
The transformer series is commonly used in shopping malls, office buildings, schools, hospitals, scenic spots and other public places. These commercial and public facilities have stable and diversified power demand, requiring both three-phase power for central air conditioning, elevator equipment and water supply systems, and single-phase power for lighting, office equipment and monitoring systems. The dual-voltage output feature of 0.38KV and 0.22KV can fully meet the comprehensive power demand of public buildings, and the low-noise and stable operation performance will not affect the working and living environment of surrounding personnel.
3.4 Temporary Engineering & Field Operation Power Supply
It is also applicable to construction site temporary power supply, road and bridge engineering, field exploration projects and rural water conservancy projects. The oil immersed structure has strong environmental adaptability, can adapt to dusty, humid and temperature-changing field working conditions, and is convenient for outdoor hoisting and installation. Multiple capacity models can flexibly cope with different temporary power loads of engineering construction, effectively solving the problem of unstable power supply for field engineering equipment and temporary living facilities.
4. Core Product Features
4.1 Multi-Specification & Flexible Voltage Matching
Covering three mainstream capacities of 200KVA, 250KVA and 315KVA, this oil immersed power transformer supports dual primary voltage options of 10KV and 10.5KV, and can stably output 0.38KV three-phase and 0.22KV single-phase low voltage. The diversified specification design realizes flexible matching with different regional grid voltage standards and different user load demands, avoiding the limitation of single-specification equipment. Users can freely select models according to project scale, grid parameters and power consumption load, which greatly improves the applicability and versatility of the equipment.
4.2 Low Energy Loss & High Operation Efficiency
Adopting high-quality oriented silicon steel sheet core and optimized winding layout, this energy-saving distribution transformer effectively reduces no-load loss, load loss and magnetizing current. Compared with traditional ordinary transformers, the energy-saving effect is significantly improved, which can effectively reduce long-term power consumption and operation costs for power grid operation and enterprise power consumption. The reasonable magnetic circuit design avoids magnetic flux leakage, ensures high-efficiency electric energy conversion, and maintains stable operation efficiency even under long-term partial load and full-load operation.
4.3 Excellent Environmental Adaptability & Durability
The whole machine adopts fully sealed welded oil tank and corrugated heat dissipation structure, with good sealing performance, which can effectively prevent rainwater, dust and humid air from invading the interior, and avoid insulating oil deterioration and insulation damp failure. The surface is treated with high-temperature weather-resistant and anti-corrosion coating, which can adapt to extreme temperatures from -40℃ to +45℃, and operate stably in outdoor open-air, humid coastal, dry inland and dusty industrial environments. The oil immersed insulation system has strong thermal stability and long service life, far exceeding dry-type transformers in outdoor harsh environment adaptability.
4.4 Strong Operational Stability & Safety Performance
The internal winding adopts integral fastening and multi-layer insulation structure, with strong mechanical stability and short-circuit impact resistance, which can effectively resist instantaneous grid short-circuit current and load impact, and prevent coil deformation and equipment damage. Equipped with standard pressure relief valve, oil level gauge and temperature detection device, it can realize real-time monitoring of operating status and automatic pressure release to avoid equipment explosion and burnout caused by overheating and overpressure. The oil immersed insulation has high dielectric strength, stable insulation performance and low partial discharge rate, ensuring long-term safe and fault-free operation.
4.5 Simple Maintenance & Low Comprehensive Cost
This series of three-phase oil immersed transformers has a mature and simple internal structure without complex vulnerable parts, with low failure rate and reliable operation. The fully sealed design does not require frequent oil replacement and internal cleaning, and daily maintenance only needs regular oil level inspection, oil quality detection and appearance anti-corrosion check. It supports long-term unattended outdoor operation, greatly reducing later operation and maintenance manpower and material investment. With moderate manufacturing cost, flexible installation and long service life, it has extremely high comprehensive cost performance in medium and small power distribution projects.
5. Frequently Asked Questions (FAQ)
Q1: How to choose between 200KVA, 250KVA and 315KVA transformer models for actual projects?
The model selection mainly depends on the actual maximum power load and future expansion demand of the project. The 200KVA oil immersed transformer is suitable for small rural communities, single small workshops and simple public facilities with low and stable power load. The 250KVA model is the most versatile specification, perfectly matching most urban community power distribution, conventional light industrial factories and school daily power supply scenarios. The 315KVA high-capacity model is recommended for scenarios with large power consumption, multiple electrical equipment and certain load peak values, such as medium-sized processing factories, comprehensive commercial buildings and centralized residential communities. It is recommended to reserve 10%–20% capacity margin during selection to adapt to future power load growth.
Q2: What is the difference between 10KV and 10.5KV primary voltage transformers in use?
In terms of basic performance, the two voltage grade transformers have consistent insulation level, heat dissipation performance and structural design, and both support 0.38KV/0.22KV dual low-voltage output. The core difference lies in the applicable grid access standards. The 10KV input model is suitable for conventional urban and rural 10KV standard power distribution grids, which is the most widely used specification in daily projects. The 10.5KV model is aimed at regional power grids with slightly higher grid voltage and industrial dedicated power grids, which can effectively avoid output voltage drop caused by long-distance power transmission and grid voltage deviation. Users only need to select the corresponding primary voltage model according to the local power grid access voltage.
Q3: What are the key maintenance points for outdoor installed 10KV oil immersed transformers?
Daily maintenance focuses on four key points to ensure long-term stable operation. First, regularly check the transformer oil level and insulating oil clarity, replace deteriorated and turbid insulating oil in time to maintain insulation and heat dissipation performance. Second, inspect the oil tank welding seams and sealing parts to eliminate hidden dangers of oil leakage, and clean the corrugated radiator dust and sundries to ensure unobstructed heat dissipation. Third, regularly test the insulation resistance of high and low voltage windings to avoid insulation aging and breakdown. Fourth, check the surface anti-corrosion coating and grounding device regularly, repair rusted and peeled parts in time, and ensure reliable grounding to prevent static electricity and lightning strike hazards.
