100KVA 200KVA 500KVA oil type transformer
100KVA 200KVA 500KVA oil type transformer
1. Product Description
100KVA 200KVA 500KVA oil type transformer is a mainstream medium and small-capacity liquid immersed distribution transformer widely deployed in civil power grids, industrial power distribution and decentralized power supply systems. Covering three most commonly used rated capacities of 100KVA, 200KVA and 500KVA, this oil immersed power transformer adopts classic oil natural air natural cooling technology and standard industrial insulation design, fully complying with IEC 60076 and global power distribution equipment standards. It is designed for 50Hz/60Hz three-phase AC power systems, supporting conventional medium-to-low voltage step-down conversion for daily power transmission and distribution.
Manufactured with high-quality low-loss grain-oriented silicon steel core and high-purity copper windings, the 100KVA to 500KVA oil type distribution transformer effectively reduces no-load loss and operating magnetic leakage, ensuring stable power conversion efficiency under light load and full load conditions. The integral sealed steel tank is filled with standard ASTM D3487 mineral insulating oil, which provides reliable electrical insulation and passive circulating heat dissipation for internal components. Different from high-capacity industrial transformers, this series features compact structure, lightweight body and flexible installation methods, adapting to pole-mounted, pad-mounted and indoor substation layout. As the most cost-effective small and medium power transformation equipment, it solves the matching problem of scattered small-load power demand in urban, rural and industrial scenarios.
2. Core Product Features
This series of 100KVA 200KVA 500KVA oil type transformers has comprehensive advantages in energy efficiency, operational stability, environmental adaptability and maintenance cost. It avoids the high failure rate and high energy consumption defects of traditional old-fashioned transformers, and is the preferred upgraded equipment for rural power grid renovation, factory power distribution and commercial building power supply.
2.1 Graded Capacity Matching for Diversified Loads
The three capacity specifications cover all common small and medium power load scenarios. The 100KVA oil type transformer is suitable for ultra-light load decentralized power supply, the 200KVA model adapts to conventional residential and small commercial loads, and the 500KVA oil immersed transformer meets the medium-load power demand of small factories and regional centralized power distribution. Users can select targeted models according to actual peak load and daily average power consumption, effectively avoiding equipment idle waste and insufficient power supply margin.
2.2 Low Loss and High Energy-Saving Performance
Adopting optimized core stacking process and balanced winding layout, this oil immersed distribution transformer greatly reduces no-load current and load loss. Compared with outdated transformers of the same capacity, its comprehensive operating power consumption is reduced significantly. The high energy conversion efficiency above 98% ensures long-term low-carbon operation, effectively saving daily power consumption costs for power grid operators and end users, and fully meets modern power grid energy-saving and emission-reduction standards.
2.3 Stable Oil Immersed Heat Dissipation and Insulation
Equipped with mature ONAN passive cooling system, the insulating oil forms natural circulation flow with temperature changes, realizing uniform and efficient heat exchange without auxiliary cooling fans. The high-dielectric mineral oil maintains stable insulation performance in long-term operation, effectively preventing partial discharge and electric breakdown. This heat dissipation structure has low mechanical failure rate, strong continuous operation capability, and can stably cope with seasonal temperature changes and short-term peak load impact.
2.4 Fully Sealed Low-Maintenance Structure
The fully welded sealed tank body completely isolates internal windings and iron core from external air, moisture and dust. It prevents insulating oil oxidation, moisture absorption and aging deterioration, eliminating frequent oil testing and replacement work required by open-type transformers. The anti-corrosion and weather-resistant shell treatment avoids rust and structural deformation in outdoor environments, realizing long-term maintenance-free operation and greatly reducing later operational and maintenance investment.
2.5 Strong Safety and Wide Environmental Adaptability
Built-in overload protection, short-circuit protection and over-temperature protection mechanisms can quickly respond to grid abnormal faults to protect internal components. The whole machine can operate stably in the ambient temperature range of -25℃ to +45℃, 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 oil type transformer can reach more than 30 years under standard operating conditions.
3. Core Usage
As core terminal power transformation equipment in medium and low voltage power distribution systems, 100KVA 200KVA 500KVA oil type transformers mainly undertake medium-voltage to low-voltage step-down conversion and regional terminal power distribution tasks. It converts standard grid medium voltage into 400V low-voltage industrial and civil power, providing compliant and stable power supply for terminal electrical equipment.
In actual power grid operation, this oil immersed power transformer can effectively stabilize terminal power supply voltage, restrain grid voltage fluctuation and harmonic interference, and balance regional power load distribution. It reduces electric energy loss in power transmission links, improves the overall power supply quality and reliability of decentralized power distribution networks. In addition, it can cooperate with small distributed new energy power generation equipment to complete voltage matching and power collection, optimizing the operating efficiency of civil and industrial power systems, and solving the problem of unstable power supply in remote and scattered power consumption areas.
4. Application Scenarios
With flexible capacity matching, low operating cost and strong environmental adaptability, 100KVA, 200KVA and 500KVA oil immersed transformers are widely used in civil power supply, small industrial production, public infrastructure and new energy supporting scenarios, covering most small and medium-load power distribution demands.
4.1 Urban and Rural Residential Power Supply
This is the most mainstream application scenario for the series oil type transformers. 100KVA and 200KVA models are widely used in rural power grid renovation, urban community terminal power distribution and suburban residential area power supply, meeting the daily lighting, household appliance and living power consumption of scattered residential users. The 500KVA transformer is suitable for centralized power supply of large residential communities, solving the problem of insufficient power supply capacity in peak power consumption periods.
4.2 Small Industrial and Workshop Power Distribution
Suitable for power supply transformation of small processing factories, mechanical workshops, garment factories and rural small enterprises. Small industrial sites have medium and stable power load, and the 500KVA oil immersed distribution transformer can fully meet the continuous operation demand of production equipment, while 100KVA and 200KVA specifications are used for auxiliary equipment power distribution and workshop partial power supply, with high cost performance and low operation failure rate.
4.3 Public Infrastructure and Commercial Facilities
Widely applied in power supporting of schools, hospitals, street lighting systems, community service centers and small shopping malls. These public facilities require stable and uninterrupted power supply, and the oil type transformer’s long-term stable operation performance can effectively guarantee the normal operation of public electrical equipment and municipal supporting systems.
4.4 Small Distributed New Energy Projects
Matched with household photovoltaic power stations, small wind power systems and rural biomass power generation projects. It completes step-down conversion and grid-connected power distribution of new energy power, solving the problem of unstable output of small new energy power generation, improving clean energy utilization rate, and realizing safe grid-connected power transmission of decentralized new energy equipment.
4.5 Outdoor Engineering and Remote Power Supply
Suitable for temporary power supply of field engineering, highway monitoring stations, remote scenic spots and pastoral breeding bases. Relying on excellent outdoor weather resistance and unattended operation capability, the 100KVA to 500KVA oil type transformer can adapt to complex field environments, providing long-term stable power guarantee for remote decentralized power consumption equipment.
5. FAQ
5.1 How to choose correctly among 100KVA, 200KVA and 500KVA oil type transformers?
The three specifications adopt consistent oil immersed structure and performance standards, with only different rated load capacities, and the selection is mainly based on actual project load demand. The 100KVA oil type transformer is ideal for single village power supply, independent monitoring equipment and ultra-light load scenarios with stable low power consumption. The 200KVA model is the most versatile specification, suitable for ordinary residential communities, small shops and conventional public facility power supply with slight load fluctuation. The 500KVA oil immersed transformer is used for medium-load scenarios such as small factories and centralized community power supply, reserving sufficient load margin for future power demand growth. Matching the capacity reasonably can avoid overload operation or equipment resource waste.
5.2 What are the core advantages of oil type transformers compared with dry-type transformers in small and medium-load scenarios?
For conventional 100KVA to 500KVA small and medium-load power distribution scenarios, oil immersed transformers have obvious practical advantages. The oil type structure adopts insulating oil circulating heat dissipation, with larger heat capacity and stronger overload resistance, which can adapt to long-term continuous outdoor operation and seasonal peak load impact. It features lower manufacturing cost, simpler later maintenance and longer service life than dry-type transformers of the same capacity. Dry-type transformers are only suitable for indoor closed environments, while oil type distribution transformers support pole-mounted and outdoor open-air installation, with wider scene adaptability and higher long-term operational cost performance.
5.3 What routine maintenance does this oil type transformer need in daily operation?
This sealed oil immersed transformer belongs to low-maintenance power equipment with simple daily management. Operators only need to conduct regular visual inspections to check for tank oil leakage, terminal aging and abnormal operating noise and temperature. It is necessary to clean the dust on the radiator surface regularly to ensure unobstructed natural heat dissipation. Thanks to the fully sealed structure, internal insulating oil is isolated from external air, with slow aging speed, and does not need annual replacement. Professional oil quality testing and equipment performance inspection can be carried out every 6–8 years. Simple standardized maintenance can effectively extend the service life and ensure stable long-term operation.
