Overview of High Voltage Main Power Transformer

Distribution Transformer 3 Phase Transformer 5kVA 10kVA 20kVA 30kVA 50kVA 63kVA 10KV To 400V Step Down Transformer is a device used to convert high voltage to lower voltage. It is critical in power systems, especially high-voltage transmission and distribution networks. The primary function of the high-voltage main power transformer is to ensure the stable operation of the power system while providing the required voltage for various power equipment.

Functional Principle of Distribution Transformer 3 Phase Transformer 5kVA 10kVA 20kVA 30kVA 50kVA 63kVA 10KV To 400V Step Down Transformer

• Voltage conversion: The most basic function of a high-voltage main power transformer is to perform voltage conversion. It reduces the high voltage in the power system to the voltage level required by the user. By changing the turn ratio of the primary side (high-voltage side) and secondary side (low-voltage side) coils, voltage rise and fall can be achieved.
• Impedance matching: Transformers can also play a role in impedance matching. For different loads, their impedance values also vary. Through the transformer’s voltage transformation effect, the impedance of the load can be matched with the impedance of the power supply system, thereby ensuring stable current transmission.
• Voltage regulation: By changing the number of turns of the primary side coil or the number of turns of the secondary side coil, the output voltage can be adjusted. In the power system, transformers are used to achieve segmented voltage control to meet the electricity needs of different users and equipment.
• Filtering function: Some particular types of high-voltage main power transformers also have a filtering function, which can filter out harmonics and reactive power components in the power supply and improve the quality of the power supply.

Specifications of Distribution Transformer 3 Phase Transformer 5kVA 10kVA 20kVA 30kVA 50kVA 63kVA 10KV To 400V Step Down Transformer

These distribution transformers handle three-phase power conversion. They step high voltage down to usable levels. The models cover 5kVA, 10kVA, 20kVA, 30kVA, 50kVA, and 63kVA capacities. Each unit transforms 10,000 volts (10kV) input down to 400 volts (400V) output. This suits commercial buildings, industrial sites, and smaller utility applications.

Primary voltage is 10,000V. Secondary voltage is 400V. The frequency is 50Hz or 60Hz, depending on regional needs. The transformers use mineral oil for insulation and cooling. Cooling type is ONAN (Oil Natural Air Natural). The core is built from high-grade, grain-oriented silicon steel laminations. This minimizes energy losses. Windings are high-purity electrolytic copper. Copper ensures efficient power transfer and durability.

Impedance voltage stays around 4% for most models. This manages fault currents effectively. The maximum temperature rise is 65K above ambient temperature. Noise levels are low, typically under 50dB(A) at rated load. Efficiency is high, exceeding 98% at full load for larger units. This saves operating costs.

Construction follows the IEC 60076 standard. Tanks are robust welded steel, painted for corrosion resistance. Terminals are accessible. They accept standard cable connections. Optional features include tap changers (off-circuit type), temperature gauges, oil level indicators, and pressure relief devices. Basic protection comes standard.

Physical size and weight increase with kVA rating. The 5kVA unit is compact. The 63kVA unit requires more space. Oil quantity also rises with capacity. All units are suitable for pole mounting or pad mounting. Installation is straightforward.

These transformers deliver reliable voltage transformation. They are built for long service life with minimal maintenance. Performance meets demanding operational conditions. Choose the kVA rating matching your specific load requirements.

Applications of Distribution Transformer 3 Phase Transformer 5kVA 10kVA 20kVA 30kVA 50kVA 63kVA 10KV To 400V Step Down Transformer

These transformers take high voltage power and make it usable for everyday needs. They step down 10,000 volts to 400 volts. This lower voltage is safe for standard equipment. Three-phase power is essential for heavy machinery and larger buildings. It provides a stable, powerful electricity supply.

Factories rely heavily on these transformers. They power motors, assembly lines, and large industrial tools. The 20kVA, 30kVA, 50kVA, and 63kVA sizes are common here. They handle the big energy demands of manufacturing.

Commercial buildings need them too. Shopping centers, offices, and hospitals use these transformers. They distribute power for lighting, heating, air conditioning, and elevators. Sizes like 10kVA, 20kVA, and 30kVA often fit these applications well.

Smaller units serve specific purposes. The 5kVA and 10kVA models are very practical. They power small workshops, farm equipment, water pumps, or groups of houses. They are ideal where the power demand is lower but three-phase is still required.

These transformers are found at the final stage before electricity reaches users. You see them on utility poles, in ground-level cabinets, or inside building substations. They are the last link in the power distribution chain. Their job is delivering the right voltage reliably.

The range from 5kVA to 63kVA covers many needs. Selecting the correct size depends on the total electrical load. Proper sizing ensures efficient operation and prevents overloads. These units are built for continuous service in various environments. They provide the essential voltage conversion for modern infrastructure.

Company Profile

PDDN Photoelectron Technology Co., Ltd. is one of the leading enterprises in power electronics technology and power products, which is fully involved in developing solar inverters， transformers, voltage regulators, distribution cabinets, thyristors， modules， diodes， heaters, and other electronic devices or semiconductors. We will be committed to providing users with high-quality, efficient products and considerate service.

It accepts payment via Credit Card, T/T, West Union, and Paypal. PDDN will ship the goods to customers overseas through FedEx, DHL, by sea, or by air. If you want high-quality Distribution Transformer 3 Phase Transformer 5kVA 10kVA 20kVA 30kVA 50kVA 63kVA 10KV To 400V Step Down Transformer, please send us inquiries; we will be here to help you.

Payment Methods

L/C, T/T, Western Union, Paypal, Credit Card etc.

Shipment

By sea, by air, by express, as customers request.

Storage Conditions

1) Store in a dry environment at room temperature.

2) Avoid damp and high temperature.

3) Use immediately after opening the inner packing bag.

5 FAQs of Distribution Transformer 3 Phase Transformer 5kVA 10kVA 20kVA 30kVA 50kVA 63kVA 10KV To 400V Step Down Transformer

What does this transformer do?
It lowers high voltage electricity. It takes 10,000 volts from power lines. It steps this down to 400 volts. This safe voltage powers factories, shops, or buildings.

Why pick a 3-phase transformer?
Three-phase power is standard for industry. It runs heavy machinery efficiently. Motors need three-phase power. This transformer delivers it reliably. Single-phase transformers won’t work for large equipment.

How do I choose the right size (kVA)?
Add up all the power your equipment needs. Get the total in kilowatts (kW). Multiply this by 1.25. This gives the minimum kVA transformer size you need. It adds a safety buffer. Always check your actual load requirements. A 50kVA unit handles more than a 20kVA unit.

Where are these transformers installed?
You see them on poles or pads near buildings. They feed power to whole facilities. Factories, shopping centers, apartment blocks use them. They connect the main grid to your local power distribution. They are outdoors. They need space for air cooling.

What maintenance is needed?
Check oil levels and leaks regularly. Look for damage to the casing. Keep vents clean. Ensure bushings and connections are tight. Schedule professional checks yearly. They test the oil and inspect internal parts. Proper maintenance prevents failures. It extends the transformer’s life.