what is oil immersed hermetically sealed type transformer?
A hermetically sealed transformer, such as an oil immersed hermetically sealed type transformer, is a type of transformer that is completely sealed from the external environment, preventing the ingress of moisture and air. This design enhances the longevity and reliability of the transformer by protecting it from environmental factors that could cause corrosion or insulation degradation. The core and windings are immersed in oil, which serves both as an insulator and a coolant. The hermetically sealed design ensures that the oil remains pure, maintaining the transformer’s efficiency and performance over time.
- Maintenance-Free: The sealed design minimizes the need for regular maintenance since the oil remains uncontaminated by external factors.
- Durability: Enhanced protection against environmental elements increases the lifespan of the transformer.
- Space-Saving: Often more compact due to the absence of a conservator tank.
Key Takeaways
- Hermetically sealed transformers are designed to prevent air and moisture from entering, which significantly enhances their durability and reduces the need for maintenance.
- The oil immersed hermetically sealed type transformer utilizes oil as both a coolant and an insulator, ensuring optimal performance and longevity.
- The development of hermetically sealed transformers in the mid-20th century was a pivotal advancement, addressing common issues related to oxidation and insulation degradation.
- These transformers are ideal for use in environments where reliability is crucial and maintenance access is limited, making them a cost-effective choice for long-term operations.
Skid Mounted Transformer（Small-substastion Transformer）
Single Phase Pole Mounted Transformer
Oil Immersed Power Transformer
Table of Content
What is a Hermetically Sealed Transformer?
An oil immersed hermetically sealed type transformer is designed to offer maximum protection against environmental contamination. The oil, which surrounds the windings and core, plays a crucial role in cooling and insulating the transformer. Since the unit is hermetically sealed, the oil remains uncontaminated by air or moisture, significantly reducing the risk of oxidation and extending the transformer’s operational life.
History of Hermetically Sealed Transformers
The development of hermetically sealed transformers dates back to the mid-20th century when the need for more reliable and durable transformers became apparent in both industrial and utility sectors. Early transformers were often prone to failures due to exposure to air and moisture, which led to oxidation of the insulating oil and subsequent breakdown of the insulation system. The introduction of hermetically sealed designs in the 1950s and 1960s was a significant advancement, as it addressed these issues by completely isolating the internal components from the external environment. This innovation not only extended the lifespan of transformers but also reduced the frequency of maintenance and operational downtime, making it a popular choice for critical applications.
Get it now: Basic Guide To Oil Immersed Transformer
Benefits of Using Hermetically Sealed Transformers
One of the primary benefits of using an oil immersed hermetically sealed type transformer is its enhanced durability. By preventing external contaminants from entering the transformer, this design reduces the likelihood of insulation failure, which is a common issue in non-sealed transformers. Additionally, the sealed environment minimizes the need for regular maintenance, making these transformers a cost-effective solution for long-term operations.
Applications of Oil Immersed Hermetically Sealed Type Transformers
These transformers are particularly suited for environments where high reliability is required, such as in industrial settings, remote locations, or areas with harsh environmental conditions. The oil immersed hermetically sealed type transformer is also ideal for use in locations where maintenance access is limited, as the sealed design requires less frequent inspection and servicing compared to other transformer types.
Get it now: What is a mini substation transformer?
Hermetically Sealed Transformer vs. Conservator Type Transformer
A hermetically sealed transformer and a conservator type transformer are two different designs, each with distinct features, advantages, and applications. Understanding the differences between these two types can help in selecting the right transformer for specific needs.
Conservator Type Transformer
A conservator type transformer, on the other hand, includes a conservator tank, which acts as an oil reservoir. This design allows the insulating oil to expand and contract as it heats up or cools down. The conservator tank is typically connected to the main transformer tank and is partially filled with oil. The remaining space in the conservator tank contains air, which is separated from the oil by a flexible diaphragm or bladder to prevent moisture from entering the oil.
- Improved Cooling: The ability to accommodate oil expansion and contraction helps in better thermal management, particularly in large transformers.
- Ease of Maintenance: The presence of a conservator tank allows for easier monitoring of oil levels and quality, facilitating maintenance and inspection.
- Commonly used in large-scale utility applications, such as in power distribution networks, where regular maintenance and monitoring are feasible.
Comparative Analysis
Design and Construction: The hermetically sealed transformer is fully enclosed, while the conservator type transformer has an additional conservator tank for oil expansion. This makes the conservator type typically larger and more suitable for higher power ratings.
Maintenance Requirements: Hermetically sealed transformers are virtually maintenance-free due to their sealed design. In contrast, conservator type transformers require regular maintenance to monitor and manage the oil and ensure the integrity of the conservator system.
Environmental Suitability: Hermetically sealed transformers are better suited for harsh or remote environments where minimal maintenance is desired. Conservator type transformers are more appropriate for installations where regular monitoring and maintenance are possible.
How to Choose the Hermetically Sealed Transformer or Conservator Type Transformer?
When deciding between an oil immersed hermetically sealed type transformer and a conservator type transformer, consider the specific application requirements, environmental conditions, and maintenance capabilities. Hermetically sealed transformers are often preferred in situations where reliability and minimal maintenance are critical, while conservator type transformers are chosen for their superior cooling capabilities and suitability for high-capacity applications.
This comparison highlights the practical considerations for selecting the appropriate transformer type, ensuring that the choice aligns with operational needs and environmental conditions.
Get it now: What is a Skid Mounted Substation?
