Single Phase 380v To 220v 30kva Step Down Transformer Isolation 10kva Oil Immersed Transformer

Single Phase 380v To 220v 30kva Step Down Transformer Isolation 10kva Oil Immersed Transformer

1. Product Description

Single Phase 380v To 220v 30kva Step Down Transformer Isolation 10kva Oil Immersed Transformer covers two mainstream single-phase capacity specifications of 10kVA and 30kVA, serving as practical oil-immersed step-down and isolation power conversion equipment for low-voltage industrial and civil power distribution systems. Designed specifically for single-phase voltage conversion scenarios, this dual-capacity oil filled transformer reliably converts 380V AC input voltage into standard 220V single-phase output voltage, solving the voltage mismatch issue between industrial three-phase power grids and single-phase electrical loads. Different from common dry-type transformers, this oil immersed single-phase transformer adopts traditional mature oil cooling and insulation technology, featuring stronger overload resistance and better outdoor environmental adaptability.

This step-down isolation transformer integrates dual functions of voltage reduction and electrical isolation, effectively isolating surge current, static interference and harmonic noise transmitted from the power grid to terminal equipment. The 10kVA compact model is suitable for small-load precision equipment power supply, while the 30kVA high-capacity version meets continuous medium-load power consumption demands. Manufactured with high-quality low-loss silicon steel core and high-purity copper windings, the equipment maintains low no-load loss and stable output accuracy during long-term operation. The fully sealed oil tank structure prevents insulating oil aging and leakage, ensuring stable performance in outdoor open-air, workshop and field working conditions. As a widely used single-phase 380V to 220V power transformation device, it is favored by users for its simple structure, reliable isolation performance and low long-term maintenance cost.

2.Technical Parameters

3. Core Purpose

The core purpose of Single Phase 380v To 220v 30kva Step Down Transformer Isolation 10kva Oil Immersed Transformer is to solve single-phase voltage conversion and electrical safety isolation problems in low-voltage power distribution systems. Most industrial on-site power grids adopt 380V three-phase power supply, while a large number of single-phase equipment, instrumentation and civil facilities only support 220V working voltage. This oil immersed step-down transformer efficiently converts 380V high voltage to standard 220V single-phase voltage, ensuring terminal electrical equipment obtains matching working voltage.

Different from ordinary voltage conversion transformers, this single-phase isolation transformer completely isolates the input power grid and output load circuit through insulated windings, cutting off ground loop current, grid surge interference and harmonic pollution. The 10kVA small-capacity model focuses on precise power supply and anti-interference protection for precision instruments, while the 30kVA model undertakes continuous medium-load voltage transformation and stable power supply work. It effectively avoids equipment burnout, data deviation and circuit damage caused by grid voltage fluctuation and abnormal surge, improving the overall safety and stability of single-phase power consumption systems in industrial and civil scenarios.

4. Application Scenarios

With dual advantages of accurate step-down performance and reliable electrical isolation, plus excellent outdoor adaptability of oil immersed structure, this dual-capacity single-phase transformer covers various industrial, civil and field engineering power consumption scenarios. It is the preferred voltage conversion and safety protection equipment for 380V to 220V single-phase power distribution:

• Industrial Workshop Single-phase Equipment Power Supply: Suitable for small industrial machinery, assembly line auxiliary equipment, workshop lighting systems and electrical control cabinets. The 30kVA model stably supports long-term continuous operation of multiple sets of single-phase equipment, while the 10kVA version is used for independent precision equipment power supply.

• Precision Instrument & Laboratory Power Protection: Widely applied in laboratory detection instruments, testing equipment and electronic precision devices. The high-isolation design filters grid clutter and voltage spikes, ensuring stable power supply and accurate operating data of precision electrical equipment.

• Outdoor Field Engineering Power Distribution: Ideal for construction site temporary power consumption, field monitoring equipment, roadside communication facilities and outdoor maintenance work. The oil immersed structure is resistant to high temperature, humidity and dust, adapting to harsh outdoor working environments that dry-type transformers cannot withstand.

• Residential & Community Auxiliary Power Supply: Used for community public lighting, elevator auxiliary power supply and property management equipment power distribution. It converts industrial 380V power to civilian standard 220V voltage, ensuring safe and compliant operation of public facilities.

• Commercial Facility Power Transformation: Applicable for shopping mall auxiliary equipment, office building electrical systems and hotel supporting facilities. It solves the problem of insufficient 220V power supply capacity in commercial areas with dominant 380V grid voltage, realizing balanced power distribution.

• Renewable Energy Auxiliary Voltage Regulation: Matched with small photovoltaic power generation systems and energy storage equipment, completing 380V to 220V single-phase voltage conversion, stabilizing output voltage quality and supporting safe grid connection of small new energy equipment.

5. Product Features

Single Phase 380v To 220v 30kva Step Down Transformer Isolation 10kva Oil Immersed Transformer adopts mature oil immersed manufacturing technology and optimized single-phase winding structure. Compared with dry-type single-phase transformers on the market, this series has obvious advantages in isolation performance, heat dissipation efficiency and environmental adaptability, fully meeting long-term stable operation requirements of various single-phase power consumption scenarios:

• Dual-capacity Flexible Matching: Integrates 10kVA small-load and 30kVA medium-load specifications, which can flexibly adapt to precision low-power equipment and continuous medium-power load scenarios. Users can select corresponding capacity according to actual power demand, avoiding capacity waste or insufficient load margin.

• High-precision Step-down & Stable Output: Optimized single-phase winding layout ensures accurate conversion from 380V to 220V, with ultra-low voltage deviation. It can automatically adapt to slight grid voltage fluctuation, maintaining constant 220V output voltage and effectively protecting terminal electrical equipment from voltage instability damage.

• Strong Electrical Isolation Performance: Strict isolation design between primary and secondary windings realizes physical electrical isolation. It effectively isolates grid surge, static electricity, harmonic interference and zero-sequence current, eliminates ground loop interference, and greatly improves power consumption safety and equipment anti-interference ability.

• Oil Immersed Efficient Heat Dissipation: Adopting standard ONAN natural oil circulation cooling mode, the internal insulating oil conducts and takes away operating heat evenly. The heat dissipation effect is far better than dry-type structure, supporting long-term full-load continuous operation without overheating.

• Excellent Outdoor Environmental Adaptability: Fully sealed anti-corrosion oil tank structure is dust-proof, moisture-proof and anti-aging. It can operate stably in high temperature, low temperature, humid and dusty harsh environments, solving the problem of poor weather resistance of ordinary dry-type transformers.

• Low Loss & Long Service Life: Low-loss silicon steel core and high-conductivity copper windings reduce no-load and load power consumption. The stable oil insulation system delays internal component aging, with low daily failure rate and service life up to 25 years under standardized operation.

6. FAQ (Frequently Asked Questions)

Q1: What is the difference between 10kVA and 30kVA 380V to 220V oil immersed isolation transformers?

The core difference lies in load capacity and application scenarios. The 10kVA single-phase oil immersed transformer is compact in size, with lower no-load loss, more suitable for low-power precision instruments, single small equipment and laboratory anti-interference power supply scenarios, focusing on power quality optimization. The 30kVA model has larger load margin and stronger continuous operation capability, which can support multiple sets of single-phase equipment working simultaneously, suitable for workshop centralized power supply and outdoor medium-load engineering scenarios. Both have the same 380V to 220V step-down and electrical isolation functions, users only need to select according to actual total load power and future expansion demand.

Q2: Why choose oil immersed type instead of dry type for 380V to 220V single-phase isolation transformers?

Oil immersed single-phase transformers have irreplaceable advantages in outdoor and long-term continuous operation scenarios. First, the natural oil circulation cooling system provides more uniform and efficient heat dissipation, with stronger overload resistance than dry-type products, and is not easy to overheat during long-term full-load operation. Second, the fully sealed oil tank structure has better moisture-proof, dust-proof and anti-corrosion performance, adapting to harsh outdoor construction sites and field environments where dry-type transformers are prone to damp and aging. In addition, oil immersed transformers have lower long-term operating temperature rise, more stable performance and longer service life, with higher cost performance in long-term engineering and industrial application.

Q3: Can this single-phase 380V to 220V step-down isolation transformer resist grid voltage surge?

Yes, this oil immersed isolation transformer has excellent anti-surge and anti-interference capability. The isolated winding structure completely cuts off the direct conduction path of grid surge and spike voltage. When the 380V input grid has instantaneous voltage surge or harmonic impact, the internal insulation structure can effectively buffer and filter abnormal voltage, avoiding sudden high voltage transmission to the 220V output terminal. It can well protect terminal electrical equipment from grid abnormal impact, which is especially suitable for equipment with strict power quality requirements and outdoor power consumption scenarios with complex grid conditions.