Pad Mounted Power Tank

The transformer tank, also referred to as the transformer tank body, serves multiple crucial functions within an electrical distribution transformer. It serves as a container to house, shield, and cool the winding and core components. Furthermore, the tank body acts as a barrier, isolating the oil and core from external elements. As the transformer operates under load and ambient temperatures rise, the volume of oil inside the transformer expands. The tank provides the necessary space to accommodate this expansion, ensuring optimal performance. Additionally, it functions as a reservoir for transformer insulating oil, contributing to the efficient operation of the transformer.

Open Tank

An open tank represents the simplest design for transformer tanks, typically suited for smaller transformers with less complex insulation and cooling systems. In this configuration, the core and coils reside within an open vessel without any enclosure. While this design may lack protections against dust and water, it facilitates easier monitoring and maintenance.

Closed Tank

A closed tank offers enhanced protection for the core and coils. In this design, the tank is fully enclosed with walls and a top cover. This configuration is well-suited for larger transformers with intricate insulation and cooling systems, shielding the core and coils from environmental pollutants.

Corrugated Tank

Constructed with corrugated steel walls and covers, this tank design provides added strength and resistance to damage during transportation and assembly. The corrugation enhances the tank's structural integrity while also improving heat dissipation, reducing noise, and enhancing insulation.

Radiator Tank

Equipped with a radiator, this tank facilitates efficient heat exchange between the transformer oil and the surrounding air. The radiator enhances cooling, thereby extending the transformer's lifespan and preventing overheating.

As ambient temperature and load increase, the level of insulating oil in the transformer rises, causing the space above it in the conservator to be partially filled by the expanding oil. Consequently, the corresponding volume of air in this gap is expelled through a breather. Conversely, when the transformer load decreases or ambient temperature drops, the transformer is deactivated, leading to contraction of the oil. This contraction primarily results from outside air entering the tank through a silica gel breather.

About Oil Level

While it's not critical to meticulously maintain the transformer oil level within the conservator tank, ensuring a sufficient amount of oil is present is essential for optimal functioning. It's imperative to prevent both overflow and depletion of the oil tank, as an empty tank should be avoided during low load conditions and overload must be prevented during full load conditions. The level of transformer oil is predominantly influenced by factors such as oil temperature, solar radiation, transformer loading, and ambient temperature. The design of the tank is primarily based on accommodating changes in the transformer oil level. As per the guidelines of the International Electrotechnical Commission (IEC), the conservator tank design should be capable of withstanding temperatures ranging from -25°C to +110°C.

Mainly used for photovoltaic power generation and wind farms.

The fuel tank adopts a fully enclosed structure, which isolates the oil from the atmosphere, reduces the oxidation process and the intervention of water vapor, and improves the stability, reliability and stability of the system equipment. At the same time, it uses a chip radiator, which is easy to disassemble and maintain.

The cabinet is treated with a special shot peening process and sprayed with anti-corrosion C3-C5 paint. It has good anti-corrosion and anti-exposure capabilities, and can effectively resist the erosion of wind and sand.

Pressure Regulation and Safety

Variations in load result in temperature fluctuations, affecting the volume of insulating oil. Serving as a safety valve, the conservator prevents over-pressurization within the main tank, ensuring the structural integrity and safety of the entire system. This pressure control is essential not only for safeguarding the transformer but also for protecting the surrounding environment, making it an indispensable feature for transformer operation. Without this control mechanism, the risk of transformer damage due to excessive pressure would be significantly higher.

Preservation of Transformer Oil Quality

The controlled environment within the conservator ensures optimal oil condition by preventing moisture infiltration, thereby keeping it dry and uncontaminated. Preserving the quality of transformer oil is critical for its insulation properties. Higher quality oil provides better insulation, ensuring efficient and safe transformer operation, especially under heavy loads.

Enhancement of Efficiency

With the appropriate oil level and quality, the transformer can dissipate heat more effectively, operating at peak efficiency. Controlled oil level and quality enhance heat dissipation, making them essential elements for optimal transformer performance.

Extended Operational Lifespan

Transformers equipped with conservator tanks tend to have longer operational lifespans. The synergistic relationship between the conservator tank and the main tank ensures the transformer is better equipped to withstand continuous operation. This contributes to the extended longevity of the transformer, reducing the frequency of maintenance and replacement, and providing a cost-effective solution for electricity distribution.

Three phase pad mounted transformer tank

Tank integrity is essential for reliability and long transformer life. Yawei designs all transformer tanks to meet high internal standards and customized customer specifications, guaranteeing a perfect fit for each application:

1. Fabricated from hot-rolled, low-carbon steel plates, plasma cutting is employed to achieve critical tolerances, and the pieces are then joined using submerged arc welding to prevent cracked seams and irregularities.
2. These tanks are equipped with tank wall stiffeners, ensuring that the walls are braced to withstand full vacuum and pressures up to 25% greater than those encountered during normal operation.
3. Corner welds are avoided by constructing tanks with bent corners.
4. Jack pads and lifting hooks are integrated into the design, facilitating lifting, jacking, or pulling operations.
5. Guides are engineered to securely fit and brace the completed core and coil assembly inside the tank, preventing shifting during shipment.
6. The covers are slightly domed to prevent water accumulation.
7. Raised flanges and machined gasket grooves are incorporated into cover openings for improved sealing.
8. Conveniently located hand holes and/or manholes provide easy access to the lower end of bushings, terminal boards, and the upper portion of the core and coil assembly.

Tank Body:

Typically constructed from steel or other robust materials, the tank body is engineered to withstand the high pressures and temperatures generated within the transformer.

Cover:

The cover, either bolted or welded onto the top of the tank body, provides a secure and leak-proof seal, ensuring the integrity of the transformer oil containment.

Inlet and Outlet Pipes:

Inlet and outlet pipes are integral components connected to the tank, facilitating the flow of transformer oil in and out of the tank, and enabling efficient operation.

Cooling System:

A dedicated cooling system is incorporated to regulate and maintain the optimal temperature of the transformer oil, preventing overheating and ensuring smooth performance.

Insulation System:

Comprising specialized materials, the insulation system is designed to insulate the transformer oil effectively and prevent electrical arcing, safeguarding the transformer and enhancing its operational safety.

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