Oil Immersed Transformer 30kva 50kva 80kva 10kv 0.38kv 0.4kv Three 380V/440V 6kv 50Hz
1. Product Description
This three phase oil immersed transformer is a versatile medium-voltage distribution power equipment tailored for standard 50Hz power grid systems, covering mainstream small and medium capacities of 30kva, 50kva and 80kva. It supports dual high input voltage grades of 6kv and 10kv, and matches multiple low output voltage specifications including 0.38kv, 0.4kv, 380V and 440V, perfectly adapting to diverse voltage matching demands of domestic and industrial power distribution scenarios. As a widely used low-loss oil filled distribution transformer, it fills the gap of flexible voltage conversion for small-load industrial and civilian power grids.
Manufactured in strict accordance with IEC and national power industry standards, the equipment adopts high-quality silicon steel sheet core and full copper three-phase winding structure, paired with mature oil natural air natural (ONAN) cooling technology and fully sealed welded steel tank design. The optimized three-phase magnetic circuit balance structure effectively reduces magnetic flux leakage and current imbalance, ensuring stable voltage conversion under 50Hz fixed frequency operation. Multiple voltage combination designs enable this 6kv/10kv step down transformer to switch freely between civilian 380V/0.38kv and industrial 440V/0.4kv output modes, with strong parameter compatibility and scene adaptability.
All capacity models from 30kva to 80kva undergo strict factory pressure resistance testing, load debugging and insulation performance detection. The fully sealed oil tank structure effectively prevents insulating oil aging, moisture intrusion and dust accumulation, solving common faults of traditional open-type transformers such as poor insulation and unstable output. With compact overall structure, standardized wiring interface and reliable operational performance, this 50Hz three-phase oil immersed power transformer is a cost-effective universal power distribution device for medium and low voltage power grid construction and renovation projects.
2. Core Purpose
The core purpose of this 30kva-80kva three phase oil immersed transformer is safe and efficient medium-to-low voltage step-down conversion and regional power distribution regulation in 50Hz power systems. It mainly converts 6kv and 10kv medium-voltage grid electricity into usable 0.38kv/380V civilian power and 0.4kv/440V industrial power, solving the voltage mismatch between high-voltage transmission lines and terminal electrical equipment, and realizing safe grid power transmission and distribution.
Beyond basic voltage conversion, the low-loss structural design of this 6kv/10kv oil immersed distribution transformer effectively reduces no-load loss and load operation loss, helping power supply departments and end enterprises reduce long-term power consumption and grid operation costs. It can balance three-phase load deviation in decentralized power supply systems, restrain grid voltage fluctuation and instantaneous current surge, stabilize regional power quality, and avoid equipment failure caused by unbalanced three-phase power and voltage instability.
In addition, the high-strength oil insulation structure realizes physical isolation between high-voltage and low-voltage circuits, providing reliable electrical safety protection for power grid lines and terminal loads. It can adapt to long-term continuous operation and intermittent peak load switching in small and medium power consumption scenarios, ensuring uninterrupted stable power supply for civilian living electricity, small industrial production and public facility power consumption under standard 50Hz grid frequency.
3. Application Scenarios
3.1 Urban and Rural Civil Power Grid Distribution
The 30kva and 50kva small-capacity models are widely applied in urban residential communities, rural centralized power supply areas, suburban towns and village-level power grid renovation projects. The 0.38kv and 380V low-voltage output fully meets daily household electricity, community public lighting, residential auxiliary equipment and village public facility power demands. The equipment’s stable voltage regulation performance effectively solves the problems of low terminal voltage and unstable power supply in rural long-distance power supply lines, greatly improving civilian power consumption quality.
3.2 Small and Medium Light Industrial Production Scenarios
The 50kva and 80kva medium-capacity three-phase oil immersed transformers are the preferred power distribution equipment for small processing workshops, handicraft factories, food processing plants and light industrial production sites. The 0.4kv and 440V industrial-grade output voltage perfectly matches small mechanical equipment, production auxiliary motors and industrial electrical systems. Adapted to standard 50Hz industrial power frequency, it can stably cope with intermittent load switching and long-term low-load continuous operation of light industrial production, meeting daily production power demands of small and medium-sized enterprises.
3.3 Municipal Public Infrastructure Projects
This multi-voltage oil immersed power transformer is commonly deployed in school campuses, hospital auxiliary power distribution rooms, urban road lighting systems, sewage treatment stations and community service facilities. Public infrastructure has high requirements for power supply stability and safety, and the equipment’s low failure rate, strong anti-interference ability and excellent insulation performance can fully meet long-term unattended operation demands of public facilities, ensuring safe and uninterrupted operation of municipal public service equipment.
3.4 Remote and Decentralized Power Supply Projects
Suitable for remote mountainous areas, pastoral areas, highway service stations, field engineering bases and rural independent power supply points. The dual 6kv/10kv high-voltage input design adapts to different regional medium-voltage grid standards, while the fully sealed outdoor waterproof and dustproof structure can resist harsh outdoor environments such as wind, rain and high temperature. The flexible capacity configuration of 30kva to 80kva accurately matches decentralized small-scale power load demands, effectively solving power supply difficulties in off-grid and remote areas.
4. Product Features
4.1 Full-Coverage Voltage and Capacity Specifications
This three-phase oil immersed transformer integrates multiple mainstream parameters, covering 6kv and 10kv dual high-voltage input, as well as 0.38kv, 0.4kv, 380V, 440V multi-specification low-voltage output. It supports three common capacity grades of 30kva, 50kva and 80kva, fully covering civilian and small industrial power consumption scenarios. All parameters are calibrated for standard 50Hz power grid operation, realizing one machine multi-purpose, avoiding customized equipment costs, and greatly improving project matching flexibility.
4.2 Low-Loss Energy-Saving Operation Performance
Adopting high-permeability low-loss silicon steel core and high-purity copper winding, the equipment minimizes magnetic flux loss and coil resistance loss. The optimized three-phase balance winding process ensures uniform current distribution of each phase, with extremely low no-load current and temperature rise. Compared with traditional old-fashioned transformers, this energy-saving oil immersed distribution transformer significantly reduces daily operation power consumption, with outstanding energy-saving effects, effectively lowering long-term grid operation and user electricity costs.
4.3 Excellent Insulation and Weather Resistance
Equipped with a fully sealed integral welded steel tank and high-performance anti-aging insulating oil, the product has superior waterproof, moisture-proof, dust-proof and dielectric insulation properties. The outer shell adopts multi-layer anti-rust and anti-corrosion spraying technology, which can resist outdoor wind and sun erosion, high temperature and low temperature temperature changes. The ONAN natural cooling system operates stably and efficiently, ensuring uniform heat dissipation under variable load conditions, and supporting long-term unattended outdoor and indoor operation.
4.4 High Safety and Stable Output Quality
Built with complete overvoltage, overload and short-circuit protection mechanisms, this 50Hz oil immersed power transformer can quickly cut off faulty circuits when encountering grid voltage surge, overload operation and line short-circuit faults, protecting terminal equipment and grid safety. The professional magnetic circuit design avoids core saturation and voltage deviation, ensuring stable 380V/440V low-voltage output, effectively restraining grid harmonic interference, and maintaining high-quality power supply under complex working conditions.
4.5 Simple Installation and Low Maintenance Cost
The overall structure is compact and standardized, supporting multiple installation methods such as indoor fixed installation, outdoor foundation installation and pole-mounted installation. The universal wiring interface simplifies on-site installation and debugging procedures, shortening construction cycle. The fully sealed structure avoids frequent oil replacement and daily maintenance work, with low later operation cost and long service life, which is very suitable for large-scale popularization in power grid renovation and small industrial and commercial power distribution projects.
5. Frequently Asked Questions (FAQ)
5.1 How to choose between 6kv and 10kv input voltage and 380V/440V output voltage?
The input voltage needs to be matched according to the local medium-voltage grid standard: 6kv input is suitable for old urban and rural small-scale power grids, while 10kv input adapts to most new municipal and industrial power grid systems. For output voltage selection, 0.38kv/380V is mainly used for residential living electricity, community public facilities and conventional civilian electrical equipment; 0.4kv/440V is targeted at small light industrial machinery, production equipment and industrial electrical loads. Matching the correct voltage combination can ensure optimal operating efficiency and avoid equipment mismatch failure.
5.2 What scenarios are the 30kva, 50kva and 80kva capacities suitable for respectively?
The 30kva model is the most suitable for single-village power supply, small community public power consumption and scattered low-load civilian scenarios. The 50kva capacity is a universal model, applicable to both small residential clusters and ordinary small commercial and light industrial loads. The 80kva high-capacity model is recommended for small processing factories, multi-household centralized residential areas and scenarios with frequent peak power consumption. Selecting capacity according to actual load can effectively avoid long-term overload operation or idle energy waste.
5.3 Why is this transformer limited to 50Hz operation and can it adapt to 60Hz grids?
This three-phase oil immersed transformer is professionally parameter calibrated and structurally optimized for standard 50Hz power grid frequency, which perfectly matches the power supply standards of most Asian and European regional power grids, achieving the lowest loss and most stable operating state. Although it can work temporarily in a 60Hz grid environment, long-term 60Hz operation will cause increased core loss, accelerated heat generation and shortened service life. Therefore, it is recommended to be used strictly in 50Hz frequency power systems to ensure long-term stable and efficient operation of the equipment.
