High-Capacity Oil-Immersed Distribution Power Transformer 40/50 MVA

Pearl Electric's high-capacity oil-Immersed distribution power transformer (40/50 MVA) is designed for high-performance power distribution in industrial, commercial, and grid applications. This transformer provides efficient energy conversion and reliable operation, making it an ideal choice for large-scale power distribution networks and renewable energy integration.

This transformer's capacity ranges from 40 MVA to 50 MVA, catering to high-capacity energy demands. Its primary voltage is customizable, typically 33kV, 66kV, or 110KV, ensuring compatibility with a wide range of power systems. The transformer is built with a durable, oil-immersed cooling system, enhancing its ability to handle high-load operations and ensuring long-term reliability.

Equipped with an on-load tap changer (OLTC), the transformer allows for voltage adjustments (±4x1.25% or as required) to maintain optimal performance under varying load conditions. Designed for three-phase systems, it ensures stable and efficient power transmission across large networks.

The transformer features Class A insulation, ensuring reliable operation even under harsh environmental conditions. Its robust construction and advanced cooling system make it suitable for both indoor and outdoor installations, including remote and challenging locations.

Product Parameters

Features of High-Capacity Oil-Immersed Distribution Power Transformer 40/50 MVA

Oil-Immersed Technology: The transformers are designed with oil-immersed cooling technology to ensure optimal performance and temperature regulation for efficient power transmission.

High Capacity: The transformers are 40 MVA to 50 MVA, designed to handle high power demands in industrial, commercial, and grid applications.

Fuse Protection: The transformers are equipped with a fuse-fuse system to protect against overloads and short circuits, providing enhanced safety and operational reliability.

Class A Insulation: Ensures reliable operation under harsh environmental conditions, including high temperatures and humidity.

Customization Options: Primary voltage customizable to 33kV, 66kV, or 110KV, with secondary voltage tailored to project needs.

Advatages of High-Capacity Oil-Immersed Distribution Power Transformer 40/50 MVA

Enhanced Safety: The fuse-fuse provides an additional layer of protection, cutting off power in the event of overload or fault, ensuring minimal risk to the transformer and connected systems.

Efficient Power Distribution: Designed to reduce no-load and load losses, ensuring high energy efficiency and lower operational costs.

Superior Cooling: Provides efficient heat dissipation, enhancing the transformer's ability to operate reliably under heavy loads and harsh conditions.

Low Maintenance Requirements: Built with high-quality materials and components, reducing the need for frequent maintenance.

Cost-Effectiveness: High efficiency and minimal maintenance requirements result in significant cost savings over the transformer's lifecycle.

Applications of High-Capacity Oil-Immersed Distribution Power Transformer 40/50 MVA

Grid: This transformer is ideal for use in regional and national power grids where reliable energy distribution is critical.

Industrial Facilities: Transformers are commonly used in manufacturing plants, refineries, and heavy industrial applications to ensure a stable energy supply.

Renewable energy projects: This transformer is also suitable for renewable energy projects of solar, wind, and hydroelectric power systems etc. to ensure efficient energy conversion and transmission.

Commercial infrastructure: From large commercial buildings to data centers, this transformer provides stable and reliable power to critical infrastructure.

Transformer Production Technology

• TRANSFORMER WINDINGS

For the low and high voltage coils, either copper or aluminum can be used as conductor material according to the standards or customer requirements. Winding are separated as LV Windings and HV Windings.

Conductor types according to voltage level and load losses:

-On LV coil: Foil (sheet) or paper insulated rectangular sectioned

-On HV coil: Enamel insulated round or paper insulated rectangular sectioned conductors are used.

The windings are made of resin coated DDP and special Kraft paper resistant to high shock and electrical withstand. The structure of this specially formed layer insulation increases the impulse voltage properties. The layer insulation also helps in achieving another important goal: to produce a rigid coil without space.

• VENTILATION

Transformers are naturally cooled with ONAN ventilation. According to customer requirements, transformers with ONAF ventilation can be also manufactured.

• TRANSFORMER CORE

The core transformers are made of cold rolled grain oriented silicon steel (CRGO).

The steels are choosen according to no-load loss value M5, MOH, HI-BI quality class and 0,30-0,23 mm thickness range.

Cores are cut fast and without burr by modern transformer lamination cut machine. The cores are aligned according to the project data with step-lap method to reduce losses and noise.

• ACTIVE PARTS

Active part is formed by the placement of the coils to core legs and alignment of the upper core. Yoke clamps and wedges are placed to compress the coils. Cover, terminal and tap changer installations are done to make it ready for first pre-tests. The alignment of the insulations on the cover, accessories and other equipments are done according to the customer requirements

• TANK AND PAINT

Tanks are in 2 types: with radiator and corrugated walls. Tank base and top covers are made of mild steel. Corrugated walls of front and side surfaces o the tank also forms the cooling surfaces.

Front and side surfaces are made of steel sheet in tank with radiator,

Tanks are sealed with welding. Tanks are cleaned with special chemicals and dry before painting. Corrosion resistant and hardly adhesive undercoat paint is applied as two layers. After undercoating the tanks are subjected to drying process. After drying process, topcoat paint is applied on the undercoating according to the customer's dye thickness requests. The tanks wait in the drying Owens. RAL 7033 color code is used as to coating paint (or with different colors as per customer requests). Inner surface of the tank is coated with special varnish.

• DRYING AND FILLING

Low Frequency Technology for Drying and Filling Oil immersed type distribution transformer, the insulation materials have to be dried before oil filling. This drying process affects the quality of the transformer directly. Pearl Electric chose Vacuum Drying Technology for drying and filling under vacuum environment. Humidity is reduced to minimum in the oil and in the active part of the tank by this process.

TECHNICAL DATASHEET FOR POWER TRANSFORMER

FAQs of High-Capacity Oil-Immersed Distribution Power Transformer 40/50 MVA

1. What are the advantages of the oil-immersed design?

The oil-immersed design provides efficient cooling, enhances durability, and ensures reliable operation under high-load conditions.

2. Does the transformer comply with international standards? 

Yes, the transformer complies with IEC, IEEE, and other international standards for safety, performance, and efficiency.

3. What cooling system does the transformer use?

It uses an oil-immersed cooling system, available in ONAN (Oil Natural Air Natural) or ONAF (Oil Natural Air Forced) configurations for efficient heat dissipation.

4. Is the transformer suitable for outdoor installation?

Yes, the transformer is designed with a weatherproof and fully sealed structure, making it ideal for both indoor and outdoor installations, even in harsh environments.

5. Can this high-capacity oil-immersed transformers be customized?

Yes, transformers can be customized to specific requirements, including winding material (copper or aluminum) and insulation options (mineral oil or FR3 oil).