50KVA 100KVA 150KVA 200KVA 250KVA 300KVA 400KVA 450KVA 500KVA 20KV Oil Immersed Electrical Power Distribution Transformer

Overview of 50KVA 100KVA 150KVA 200KVA 250KVA 300KVA 400KVA 450KVA 500KVA 20KV Oil Immersed Electrical Power 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 50KVA 100KVA 150KVA 200KVA 250KVA 300KVA 400KVA 450KVA 500KVA 20KV Oil Immersed Electrical Power 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 50KVA 100KVA 150KVA 200KVA 250KVA 300KVA 400KVA 450KVA 500KVA 20KV Oil Immersed Electrical Power Distribution Transformer

These transformers supply reliable power distribution. They handle loads from 50kVA up to 500kVA. The primary voltage is 20kV. Secondary voltages are common like 400V or 415V. Mineral oil insulates and cools the core and windings. This oil extends the transformer’s life.

The core uses high-grade silicon steel. This design minimizes energy loss. Core losses are low even without load. Copper losses increase with the load. Total losses meet strict efficiency standards. The transformers are efficient across their operating range.

Cooling happens naturally. Heat rises through the oil. The oil circulates inside the tank. The tank has cooling fins or radiators. These parts increase the surface area. Heat dissipates into the surrounding air. This keeps the transformer within safe temperatures.

Windings are copper or aluminum. They are carefully wound. They are then fully submerged in oil. The tank is welded steel. It provides strong protection. Bushings connect the high and low voltage cables. They are designed for 20kV operation. Basic protection devices are often included.

Basic Impulse Level (BIL) is high. This protects against voltage surges. Lightning strikes are a common cause. The transformers are built for longevity. They need little maintenance. Oil levels and quality should be checked periodically. Connections must stay tight.

Physical size and weight grow with capacity. A 50kVA unit is relatively compact. A 500kVA unit is significantly larger. Weight ranges from roughly 400kg for 50kVA to over 3000kg for 500kVA. Oil volume also increases. Small units need hundreds of liters. Large units need over 800 liters. Installation needs solid foundations.

Applications of 50KVA 100KVA 150KVA 200KVA 250KVA 300KVA 400KVA 450KVA 500KVA 20KV Oil Immersed Electrical Power Distribution Transformer

These transformers handle medium voltage power distribution. They step down 20,000 volts to safer, usable levels. Many industries and places need them. Their oil cooling keeps them running reliably for years.

The 50kVA unit suits small operations. Think small workshops, farms, or large pumps. It powers essential equipment without taking much space. The 100kVA size fits larger needs. It powers small commercial buildings, cell towers, or water treatment plants effectively.

Need more power? The 150kVA transformer helps. It supports larger retail stores, bigger pumps, or small manufacturing lines. The 200kVA model steps up again. It powers small factories, apartment complexes, or large irrigation systems well.

Factories need robust power. The 250kVA transformer handles multiple heavy machines. It’s common in light industrial settings. The 300kVA size is even stronger. It powers larger manufacturing plants or big commercial buildings reliably.

Big facilities demand serious capacity. The 400kVA transformer delivers. It runs large factories, hospitals, or big office complexes. Need just a bit more? The 450kVA unit bridges the gap before the largest size. It supports expanding industrial sites or large data centers temporarily.

The 500kVA transformer is a powerhouse. It feeds big factories, large shopping centers, or major hospital wings. All these sizes use oil for cooling and insulation. This makes them tough and long-lasting. They work outdoors in substations or inside dedicated rooms. They form the core link between high-voltage lines and the power you actually use.

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 50KVA 100KVA 150KVA 200KVA 250KVA 300KVA 400KVA 450KVA 500KVA 20KV Oil Immersed Electrical Power 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 50KVA 100KVA 150KVA 200KVA 250KVA 300KVA 400KVA 450KVA 500KVA 20KV Oil Immersed Electrical Power Distribution Transformer

What are these transformers used for?
These oil-filled transformers step down high voltage electricity. They work for factories, big buildings, and power distribution networks needing 50kVA to 500kVA capacity. They handle the 20kV input voltage common in many systems.

How do they stay cool?
The transformer core and windings sit inside a tank filled with special insulating oil. This oil absorbs heat generated during operation. The heated oil rises. It flows through radiator fins or cooling tubes on the outside. Air passes over these surfaces. This cools the oil. The cooled oil sinks back down to absorb more heat. This cycle keeps the transformer at a safe temperature.

Where can I install one?
These transformers are designed for outdoor installation. They mount directly on a strong, level concrete pad. You need enough space around it for safety and airflow. Keep it away from walls or other equipment. Good ventilation is critical for cooling. Follow local electrical codes precisely.

What protects them from problems?
The tank has protective devices. A pressure relief valve releases excess pressure inside. This prevents tank rupture if a serious internal fault happens. An oil level gauge shows if the oil is too low. Low oil means bad cooling and danger. The conservator tank helps manage oil expansion and contraction. It keeps the main tank full. Regular checks are essential.

What maintenance is required?
Check the oil level regularly using the sight gauge. Look for leaks around the tank, welds, and gaskets. Listen for unusual humming or buzzing sounds. Test the insulating oil quality periodically. Dirt or moisture weakens the oil’s insulating ability. Keep the cooling fins clean. Blocked fins cause overheating. Schedule professional inspections as the manufacturer recommends.