15KVA 50KVA 80KVA 100KVA Three Phase oil type transformer
15KVA 50KVA 80KVA 100KVA Three Phase oil type transformer
1. Product Description
15KVA 50KVA 80KVA 100KVA Three Phase oil type transformer is a series of compact small-capacity oil immersed distribution transformers widely used in global civil power grids, light industrial power distribution and decentralized power supply systems. Covering four mainstream miniature capacity specifications including 15KVA, 50KVA, 80KVA and 100KVA, this three-phase oil type power transformer follows IEC 60076 international standards and GB/T 6451 national manufacturing specifications, fully adapting to 50Hz and 60Hz three-phase AC power distribution systems. As the most commonly used low-capacity medium-to-low voltage conversion equipment, it perfectly solves the power matching demand of scattered small-load power consumption scenarios.
This series of three-phase oil immersed transformers adopts high-quality low-loss grain-oriented silicon steel core and high-purity copper winding structure, with optimized magnetic circuit and winding layout to effectively control no-load loss and load operation loss. The fully sealed corrugated steel tank is filled with PCB-free environmentally friendly mineral insulating oil, which undertakes dual functions of electrical insulation and natural circulating heat dissipation. Different from large industrial transformers, these 15KVA to 100KVA small oil type transformers feature ultra-compact size, lightweight structure and flexible installation methods, supporting pole-mounted, pad-mounted and indoor substation installation. With stable voltage output, low operating noise and strong weather resistance, it can run continuously and unattended for a long time in outdoor and harsh field environments, being a cost-effective basic power transformation device for terminal power distribution.
2. Core Product Features
This series of 15KVA, 50KVA, 80KVA and 100KVA three-phase oil type transformers has outstanding practical advantages in energy efficiency, operational stability, environmental adaptability and later maintenance. It makes up for the defects of high energy consumption and poor durability of traditional old-fashioned small transformers, and is the preferred equipment for rural power grid renovation, scattered engineering power supply and small civil power distribution.
2.1 Complete Capacity Gradient for Precise Load Matching
The four graded capacities cover all mainstream miniature power load scenarios, realizing accurate one-to-one matching for different power demands. The 15KVA three-phase oil type transformer is tailored for ultra-light load equipment and single-point power supply; the 50KVA model adapts to small community and public facility conventional power consumption; the 80KVA specification is suitable for light industrial auxiliary power distribution with slight load fluctuation; the 100KVA oil immersed transformer reserves sufficient load margin for small centralized power supply scenarios. Users can select the corresponding model according to actual peak load and daily average power consumption, effectively avoiding equipment overload operation or idle resource waste.
2.2 Low Loss Energy-Saving Operation and High Conversion Efficiency
Adopting advanced full-mitered core stacking technology and balanced three-phase winding design, this small-capacity oil immersed distribution transformer greatly reduces no-load current and magnetic leakage loss. Compared with traditional outdated transformers of the same capacity, the overall operating power consumption is significantly reduced, and the power conversion efficiency remains above 98% under long-term light and medium load operation. It fully meets modern power grid energy-saving and low-carbon standards, effectively reducing daily operating power costs for power grid operators and end users, and achieving stable and economical power operation.
2.3 Reliable Oil Immersed Heat Dissipation and Insulation Performance
Equipped with mature ONAN natural air cooling system, the internal insulating oil forms automatic natural circulation with temperature changes, realizing uniform and efficient passive heat exchange without auxiliary cooling fans or power equipment. The high-purity insulating oil has excellent dielectric strength, which can effectively isolate windings and iron core, prevent partial discharge and electric breakdown, and ensure safe and stable operation of internal components. This passive heat dissipation structure has no mechanical wearing parts, low failure rate and strong continuous operation capability, and can cope with seasonal temperature changes and short-term peak load impact.
2.4 Fully Sealed Maintenance-Free Structure
The integral fully welded sealed steel tank completely isolates internal windings and insulating oil from external air, dust and moisture. It fundamentally avoids insulating oil oxidation, moisture absorption and aging deterioration caused by long-term exposure to the external environment. The precision sealing process effectively prevents oil leakage faults, realizing long-term maintenance-free operation. The outer shell adopts electrostatic anti-corrosion and weather-resistant spraying treatment, which can resist ultraviolet aging, rain erosion and rust deformation, greatly reducing later operation and maintenance workload and comprehensive cost.
2.5 Strong Safety and Wide Environmental Adaptability
Built-in multi-dimensional safety protection mechanisms including overload protection, short-circuit protection and over-temperature protection can quickly respond to grid voltage fluctuation and sudden fault impact to protect internal equipment safety. The whole machine can operate stably in the ambient temperature range of -25℃ to +45℃ and altitude below 1000 meters, adapting to outdoor open-air, humid, high-temperature and low-temperature harsh working environments. With strong seismic performance and lightning surge resistance, the service life of this three-phase oil type transformer can reach more than 30 years under standard operating conditions.
3. Core Usage
As basic terminal power transformation equipment for small-load power distribution systems, 15KVA 50KVA 80KVA 100KVA Three Phase oil type transformer is mainly used for medium-voltage to low-voltage step-down conversion and terminal decentralized power distribution. It converts standard grid medium voltage into 380V/400V three-phase low-voltage power, providing compliant and stable power supply for civil electrical equipment, light industrial machinery and public facility systems.
In actual power grid operation, this small-capacity three-phase oil immersed transformer can effectively stabilize terminal power supply voltage, restrain grid harmonic interference and voltage fluctuation, and balance regional scattered power load distribution. It reduces electric energy loss in short-distance power transmission links and improves the overall power supply quality and reliability of rural and suburban decentralized power distribution networks. In addition, it can support voltage matching and power collection for small distributed new energy equipment, optimize the operation efficiency of miniature power supply systems, and solve the problems of unstable voltage and insufficient power supply capacity in remote scattered power consumption points.
4. Application Scenarios
With flexible capacity matching, low operating noise, low energy consumption and strong outdoor adaptability, this series of three-phase oil type transformers are widely used in civil power supply, light industrial production, public infrastructure, field engineering and small new energy supporting scenarios, covering almost all miniature three-phase power distribution demands.
4.1 Rural and Suburban Residential Power Supply
This is the most common application scenario for the series products. 15KVA and 50KVA three-phase oil immersed transformers are widely used for single-village and cluster residential terminal power distribution in rural and remote suburban areas, meeting daily living power consumption such as household lighting, electrical appliances and water pumps. 80KVA and 100KVA models are suitable for centralized power supply of suburban small communities, effectively solving the problem of voltage drop and insufficient power supply in peak power consumption periods of rural power grids.
4.2 Light Industrial and Small Workshop Power Distribution
Suitable for power supporting of small processing workshops, textile factories, food processing plants and rural small handicraft factories. These light industrial scenarios have stable small and medium power loads. 80KVA and 100KVA oil type transformers can continuously and stably supply power for small production machinery, while 15KVA and 50KVA specifications are used for auxiliary equipment power distribution and workshop lighting power supply, with high cost performance and low failure rate.
4.3 Public Infrastructure and Municipal Facilities
Widely applied in power supply of schools, village clinics, community service centers, rural street lighting systems and environmental monitoring stations. Public facilities require long-term stable and uninterrupted power supply. The low-noise and high-stability operation performance of three-phase oil immersed transformers can fully meet the unattended operation demand of municipal public equipment, ensuring the normal operation of basic public service facilities.
4.4 Small Distributed New Energy Projects
Matched with household small photovoltaic power stations, micro wind power systems and rural biomass power generation equipment. This small-capacity oil type transformer completes step-down conversion and grid-connected power distribution of new energy power, adapts to the unstable output characteristics of miniature new energy power generation, improves clean energy utilization rate, and realizes safe and efficient grid-connected power transmission of decentralized new energy systems.
4.5 Field Engineering and Remote Monitoring Power Supply
Ideal for temporary power supply of field exploration, highway monitoring equipment, remote scenic spot facilities and pastoral breeding bases. Relying on excellent outdoor weather resistance, dustproof and waterproof performance, the transformer can operate stably in complex field open-air environments for a long time, providing reliable continuous power guarantee for remote unattended equipment and temporary engineering projects.
5. FAQ
5.1 How to select the right capacity from 15KVA, 50KVA, 80KVA and 100KVA three-phase oil type transformers?
All four specifications adopt the same three-phase oil immersed structure and manufacturing standards, with consistent safety and environmental adaptability, only differing in rated load capacity. The 15KVA model is suitable for ultra-light load scenarios such as single monitoring equipment, individual rural households and miniature auxiliary power supply with stable low power consumption. The 50KVA transformer is the most widely used general specification, perfect for village public facilities, small shops and ordinary rural cluster power supply. The 80KVA specification is applicable for light industrial workshops and small breeding farms with slight load growth. The 100KVA oil immersed transformer is used for small community centralized power supply and miniature new energy power stations, reserving enough load margin for future power demand increase. Reasonable capacity selection can avoid overload faults and equipment waste.
5.2 What are the advantages of three-phase oil type transformers over dry-type transformers in small-load scenarios?
For 15KVA to 100KVA miniature power distribution scenarios, three-phase oil immersed transformers have more prominent practical advantages. The oil circulating heat dissipation system has larger heat capacity and better temperature resistance, which can adapt to long-term outdoor full-load operation and sudden peak load impact, while dry-type transformers are prone to overheating under continuous load. In addition, oil type transformers support pole-mounted outdoor installation with wider environmental adaptability, lower manufacturing cost and longer service life. Dry-type products are only suitable for indoor closed environments. For rural power grids, field engineering and outdoor decentralized power supply, three-phase oil type transformers have higher stability and long-term cost performance.
5.3 What daily maintenance is required for this small-capacity three-phase oil type transformer?
This fully sealed three-phase oil immersed transformer belongs to typical low-maintenance power equipment, with extremely simple daily management. Operators only need to conduct regular visual inspections to check for tank oil leakage, shell corrosion and loose terminal connections, and observe operating noise and oil temperature to ensure no abnormal operation. It is necessary to regularly clean dust on the radiator surface to keep smooth natural heat dissipation. Thanks to the fully sealed structure, internal insulating oil will not be damp or oxidized, and frequent oil replacement is not required. Professional oil quality testing and performance debugging can be carried out every 6–8 years. Simple standardized maintenance can effectively extend the service life and ensure long-term stable operation of the equipment.
