Overview of Low Voltage Transformers

20kva 380v to 220v Three Phase Low Voltage Dry Type Autotransformer is critical power equipment that uses the axiom of electromagnetic induction to convert AC voltage, including voltage, current, impedance conversion, isolation, and stability functions. It usually consists of three parts: primary coil, secondary coil, and iron core (or magnetic core). Low-voltage transformers are widely used in power systems for voltage regulation, impedance matching, and safety isolation. It is also commonly used in various electronic devices and circuits, such as audio devices, TV receivers, computer power supplies, etc., to achieve functions such as voltage, current, and impedance conversion. In addition, low-voltage transformers also play an essential role in safety, preventing excessive recent or circuit failures from posing a threat to equipment or personal safety and protecting equipment from harmful effects such as sudden power changes and surge currnts.

Features of Low Voltage Transformers

Small size, low power, easy installation, suitable for low-power equipment and short distance power transmission.

Not using oil as an insulation medium is more environmentally friendly.

Has excellent moisture and corrosion resistance, suitable for harsh working environments.

Strong isolation, with high safety and reliability.

No need for oil inspection, filling, and replacement, reducing maintenance costs and workload.

Low magnetization current, low noise, low temperature rise, stable performance and high efficiency.

Specification of 20kva 380v to 220v Three Phase Low Voltage Dry Type Autotransformer

This 20kVA autotransformer steps down three-phase voltage. It converts 380V input to 220V output. This suits applications needing a stable 220V supply. It’s a low voltage, dry-type unit. This means it uses air for cooling. It doesn’t use oil. This makes it safer. It’s cleaner for indoor use.

The core uses high-grade silicon steel. This minimizes energy losses. It reduces heat buildup. The windings are copper. Copper conducts electricity well. It ensures good efficiency. The unit handles 20,000 volt-amperes. This is its power rating. It manages significant electrical loads reliably.

Input connects to 380V three-phase lines. Output delivers 220V three-phase power. The voltage change is fixed. It’s designed for this specific ratio. The autotransformer design is simpler. It uses fewer materials. This keeps costs lower. It also makes the unit lighter. It takes up less space. Installation is easier.

The enclosure is robust. It’s often made of steel. This protects internal components. It shields against dust. It prevents accidental contact. Ventilation openings allow air flow. Good cooling is essential. Thermal protection may be included. This guards against overheating. It enhances safety. Long service life is expected.

Efficiency is a key benefit. Less energy gets wasted as heat. This saves operating costs. It runs quietly. No moving parts create noise. It’s suitable for offices. Workshops benefit from it. Medical facilities use this type. It powers machinery needing 220V. It supports lighting systems reliably. It stabilizes voltage for sensitive equipment. Proper installation by an electrician is necessary. Correct sizing ensures optimal performance.

Applications of 20kva 380v to 220v Three Phase Low Voltage Dry Type Autotransformer

This 20kVA autotransformer converts 380V three-phase power down to 220V three-phase. It handles low voltage applications. The dry type design means it uses air for cooling. This avoids messy oil. This makes it safer for indoor use. It also needs less maintenance.

Many industrial settings need this voltage step-down. Factories often have machines built for 220V. Newer power supplies might deliver 380V. This transformer bridges that gap. It powers older equipment reliably. Think machine tools like lathes or milling machines. Think conveyor systems or packaging lines. It keeps essential production running.

Testing labs use this transformer too. Equipment testing often requires specific voltages. Providing stable 220V from a 380V source is crucial. This ensures accurate test results. It protects sensitive instruments.

Construction sites need temporary power. Large tools might require 220V. The main site supply could be 380V. This autotransformer provides the right voltage. It supports drills, pumps, or welding gear. Its robust design handles tough conditions.

Upgrading electrical systems happens. Parts of a building might still use 220V equipment. The main distribution could be upgraded to 380V. Installing this transformer solves the problem. It avoids replacing all the 220V machines. This saves significant cost.

The autotransformer design is key. It uses a single winding. This makes it smaller and lighter than isolation transformers. It costs less too. Efficiency is high. Less energy is lost as heat. This lowers operating expenses over time.

Installation is straightforward. Wall mounting or floor standing are options. Its compact size saves valuable space. Ventilation is important. Keep it clear for proper air cooling. Safety is enhanced. No flammable oil is present. This reduces fire risk significantly.

Rugged construction ensures long life. It handles typical electrical loads well. Voltage regulation is stable. Your 220V equipment gets consistent power. This protects motors and electronics. Downtime is minimized.

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 20kva 380v to 220v Three Phase Low Voltage Dry Type Autotransformer, 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 20kva 380v to 220v Three Phase Low Voltage Dry Type Autotransformer

Here are 5 key things to know about the 20kVA 380V to 220V Three Phase Low Voltage Dry Type Autotransformer:

What does this transformer actually do?
It changes three-phase voltage levels. It takes 380V input power. It steps this down to 220V output. This lets you run 220V equipment directly from a 380V supply. It handles loads up to 20,000 VA (20kVA).

Why pick an autotransformer over a regular isolation transformer?
Autotransformers are simpler. They share a winding between input and output. This makes them smaller. It makes them lighter. It makes them more affordable. They are very efficient for direct voltage conversion like 380V to 220V. You save space and money.

Is it safe? It doesn’t isolate the circuits?
Safety is built in. The dry-type design uses no oil. It uses air for cooling. It has tough insulation. Internal protection guards against overheating. Automatic cut-offs trigger if it gets too hot. It meets safety standards. Remember, autotransformers connect input and output electrically. You must ensure correct grounding. Follow all electrical codes.

What kind of equipment needs this transformer?
Use it for machines needing 220V three-phase power. This includes industrial motors. It includes machine tools. It includes certain types of heaters. It includes other factory equipment. Connect it where your main supply is 380V three-phase. It bridges the voltage gap.

Are there any special features?
Yes. Being dry-type means no fire risk from oil. It requires less maintenance. It runs quietly. The design is compact. It fits easily into panels or equipment rooms. It provides reliable voltage conversion. It protects your 220V equipment from the higher 380V supply.