High Quality 3 Phase 250Kva 315 Kva 400kva 500kva 22kv 25kv Oil Immersed Distribution Transformer

Overview of High Quality 3 Phase 250Kva 315 Kva 400kva 500kva 22kv 25kv Oil Immersed Distribution Transformer

An oil-immersed transformer is a type of electrical transformer where the core and windings are submerged in an insulating oil. This oil serves two primary functions: it acts as a highly effective insulator between conductive parts and as a coolant to dissipate heat generated during operation. These transformers are robust, reliable, and highly efficient, making them the standard choice for high-voltage power distribution and transmission networks, typically installed outdoors in substations.

Features of High Quality 3 Phase 250Kva 315 Kva 400kva 500kva 22kv 25kv Oil Immersed Distribution Transformer

• Effective Cooling: The insulating oil efficiently absorbs heat from the core and windings and transfers it to the radiator fins, allowing for natural or forced circulation and higher overload capacity.
• Superior Insulation: The oil provides much better dielectric strength than air, allowing for a more compact design for a given voltage rating and protecting against short circuits.
• Robust Construction: Designed for long-term, reliable operation (often 25-30 years) in harsh outdoor environments.
• Overload Capacity: Can handle temporary power overloads better than dry-type transformers due to the thermal mass and cooling properties of the oil.
• Protection System: Equipped with a conservator tank (to allow for oil expansion), breather (to absorb moisture from air), and protective relays (Buchholz relay) for internal fault detection.
• Cost-Effective: Generally more economical for high-power applications compared to dry-type transformers.

Specifications of High Quality 3 Phase 250Kva 315 Kva 400kva 500kva 22kv 25kv Oil Immersed Distribution Transformer

These transformers handle demanding electrical loads reliably. They come in common power ratings like 250kVA, 315kVA, 400kVA, and 500kVA. They work with medium voltage systems, specifically rated for primary voltages of 22kV or 25kV. The secondary voltage is typically 400V or 415V, suitable for standard industrial use. These are oil-immersed types, meaning the core and windings sit inside a tank filled with insulating oil. This oil cools the transformer and provides vital electrical insulation.

The core uses high-grade, grain-oriented silicon steel. This material minimizes energy losses during operation. Copper or aluminum conductors form the windings. The design ensures low impedance, helping manage short-circuit currents effectively. The tank itself is robust steel, welded for strength and complete oil containment. It includes essential features like an oil conservator tank. The conservator allows the oil to expand and contract safely with temperature changes. A silica gel breather keeps moisture out of the oil.

Cooling is crucial. These transformers often use ONAN cooling (Oil Natural Air Natural). Heat from the windings transfers to the oil. The warm oil naturally circulates, rising to the tank walls. The tank walls then release the heat into the surrounding air. Larger units might need radiators for extra cooling surface. Safety is paramount. A pressure relief device protects the tank from internal overpressure events. An oil level gauge provides a clear view of the oil quantity inside.

These transformers meet strict performance standards. They achieve high efficiency levels, reducing wasted energy. They are built tough for long service life in demanding conditions. Noise levels are kept low during normal operation. They undergo rigorous testing before leaving the factory. This includes routine tests and sometimes special tests. Key checks measure resistance, voltage ratio, losses, and impedance. Dielectric tests confirm the insulation strength, including the Basic Impulse Level (BIL). The BIL rating shows the transformer’s resilience against high-voltage surges. Leak tests guarantee the tank and welds are completely sealed.

Applications of High Quality 3 Phase 250Kva 315 Kva 400kva 500kva 22kv 25kv Oil Immersed Distribution Transformer

High quality oil immersed distribution transformers handle heavy power loads reliably. These units come in common ratings like 250kVA, 315kVA, 400kVA, and 500kVA. They operate at 22kV or 25kV voltages. Factories use them extensively. Manufacturing plants need stable power for large machinery. These transformers deliver that. They step down high voltage electricity from the grid. Then it becomes safe for factory equipment.

Commercial buildings benefit too. Shopping malls and office complexes require robust power distribution. These transformers supply it. They manage the electrical load efficiently. This prevents overloads. It also cuts energy waste.

Utility companies install them in substations. They form the backbone of local power networks. Transformers distribute electricity to neighborhoods. They handle peak demand periods smoothly. Their oil cooling system is key. It keeps temperatures stable during continuous operation. This extends the equipment lifespan. Maintenance needs stay low.

Renewable energy projects use these transformers. Solar farms and wind parks connect to the grid. Transformers adjust voltage levels for transmission. They ensure clean energy flows without interruption.

The oil immersed design offers durability. It withstands harsh weather. Outdoor installations are common. These transformers resist moisture and dust. Internal components stay protected. The oil acts as insulation and coolant. Performance stays consistent year after year. Reliability is critical in power distribution. These units provide it. They are built for long term service.

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 High Quality 3 Phase 250Kva 315 Kva 400kva 500kva 22kv 25kv Oil Immersed Distribution 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 High Quality 3 Phase 250Kva 315 Kva 400kva 500kva 22kv 25kv Oil Immersed Distribution Transformer

What are these transformers mainly used for?
These power big buildings, factories, and large equipment. They step down high voltage electricity from the grid. This makes it safe and usable for machinery and lighting. They handle heavy loads reliably.

Is the oil inside safe?
Yes, the oil is special transformer oil. It insulates and cools the windings effectively. The tank is sealed tightly. This prevents leaks and keeps the oil stable. It meets strict safety standards. Fire safety features are included.

How often do they need maintenance?
Regular checks are vital. Inspect the oil level and condition yearly. Look for leaks or damage to the tank. Professional servicing every few years is recommended. This keeps the transformer running efficiently. It prevents unexpected breakdowns.

Do they come with safety approvals?
Absolutely. These transformers carry international certifications. They meet IEC standards. They also comply with local grid codes. This ensures safe operation. It guarantees compatibility with your power system.

How long do they typically last?
These are built tough. Expect 25 years or more of service. Proper installation is key. Consistent maintenance is essential. Good quality materials and manufacturing ensure this long lifespan. They are a solid investment.