315kV enclosed transformer

　　The term "315kV enclosed transformer" may indeed be confusing. The standard specification is typically "315kVA enclosed transformer" ("kVA" is the unit of capacity, while "kV" is the unit of voltage). Below is an introduction to the 315kVA enclosed transformer:

　　Technical Parameters

　　Rated Capacity: The common specification is 315kVA, with various other capacities available such as 30kVA, 50kVA, 100kVA, 125kVA, 160kVA, 200kVA, 250kVA, 400kVA, 500kVA, 630kVA, etc.

　　Rated Voltage: The high-voltage side is commonly 10kV, and the low-voltage side is commonly 0.4kV.

　　Rated Current: Calculated using the formula In=3UnSn (where In is the rated current, Sn is the capacity, Un is the rated voltage, and 3≈1.732), the rated current on the high-voltage side (10kV) is approximately 315÷(1.732×10)≈18.2A, and on the low-voltage side (0.4kV) is approximately 315÷(1.732×0.4)≈454.7A.

　　Connection Group Symbol: A common symbol is Dyn11, but the specific symbol may vary depending on the manufacturer and design.

　　Impedance Voltage: It is generally around 6%.

　　Performance Advantages

　　High Efficiency and Energy Saving: Advanced designs and materials are employed to reduce no-load and load losses, enhancing energy utilization efficiency.

　　Safety and Reliability: The fully enclosed structure prevents foreign objects from entering, reducing the likelihood of failures. It also effectively prevents oil pollution and fire accidents, improving the safety of equipment operation.

　　Strong Environmental Adaptability: Suitable for various harsh environments, such as high altitudes, low temperatures, and high humidity, ensuring stable operation under different working conditions.

　　Convenient Maintenance: It eliminates periodic maintenance tasks such as replacing silica gel in traditional breathers and oil filtration, reducing maintenance costs and workload.

　　Structural Features

　　Fully Enclosed Housing: A sealed metal housing is used to completely enclose the transformer's oil tank, windings, and cooling facilities within, forming a sealed space that prevents oxygen and moisture from entering, thereby extending the service life of the insulating oil.

　　High-Quality Materials: The core is made of high-quality grain-oriented cold-rolled silicon steel sheets, the windings use high-quality conductors, and the insulation system employs advanced materials, enhancing the performance and reliability of the transformer.

　　Reasonable Layout: The high-voltage and low-voltage chambers are separated individually. The low-voltage chamber is equipped with a temperature controller, and the transformer chamber is equipped with fans. Sufficient heat dissipation channels are left on the top to ensure effective heat dissipation during transformer operation.

　　Application Scenarios

　　Urban Power Grids: Meeting the demands of urban power grids for efficient, energy-saving, and safe power supply, it can be used in urban power distribution systems.

　　Industrial Sector: Widely applied in industries such as steel manufacturing, petrochemicals, and industrial automation, providing stable power support for various industrial equipment.

　　Commercial Buildings: Suitable for places like commercial centers, airports, and railway stations to ensure normal power supply.

　　Special Environments: Applicable to special industrial scenarios with dense dust and significant humidity fluctuations, as well as harsh environments such as high altitudes and low temperatures.