Oil immersed power transformer 10kV distribution energy-saving copper core S13 series

Description :

  Power transformer is the core electrical equipment used for voltage conversion in the power grid system, mainly solving the loss problem in long-distance transmission of electrical energy and the voltage matching requirements of terminal electrical equipment. This device converts high-voltage electrical energy into low-voltage electrical energy through the principle of electromagnetic induction, or vice versa, and is widely used in urban distribution networks, industrial parks, residential areas, and commercial complexes. Typical application scenarios include voltage reduction and distribution from 10kV to 0.4kV, ensuring stable operation of backend loads. As a static electrical equipment, power transformers have the characteristics of compact structure, reliable operation, and easy maintenance. They are the key nodes to ensure the safe power supply of the power system and are suitable for various industrial and civilian facilities that require stable voltage input.

  The specification parameters of power transformers include key indicators such as rated capacity, voltage level, connection group, and impedance voltage. The common capacity range is from 30kVA to 2500kVA, with a rated voltage of 10kV or 35kV on the high voltage side and 0.4kV on the low voltage side. The iron core is made of high-quality cold-rolled silicon steel sheets stacked together, and the coil is wound with high-purity oxygen free copper to ensure low loss and high mechanical strength. The shell is mostly a corrugated oil tank or a sealed structure, filled with insulating oil inside to enhance heat dissipation and insulation performance. The product complies with the GB 1094 series national standards and IEC international electrical standards, and has passed no-load loss, load loss, and temperature rise tests to ensure long-term stable operation under rated conditions. Some models meet the second or first level energy efficiency standards.

  When selecting power transformers, it is necessary to comprehensively consider the nature of the load, environmental temperature, and installation space. For places with large load fluctuations, it is recommended to choose oil immersed transformers with strong overload capacity; For indoor environments with high fire prevention requirements, such as basements or high-rise buildings, dry-type transformers (such as SCB series) should be selected. It is necessary to clearly distinguish the application boundary between oil immersed and dry type: the former has good heat dissipation, low cost, and is suitable for outdoor or independent substations; The latter is flame retardant, maintenance free, and suitable for indoor intensive installation. At the same time, the appropriate capacity should be selected based on the actual maximum load rate to avoid energy waste caused by "big horses pulling small cars" or long-term overload affecting equipment life. Pay attention to checking the impedance voltage value to ensure that the short-circuit current is controlled within the allowable range of the protective equipment.

  The installation of power transformers should follow the electrical engineering construction specifications, and the foundation should be horizontal and stable. The grounding resistance should meet the design requirements (usually not greater than 4 Ω). Daily maintenance includes regular inspections of oil level, oil temperature, and sound to ensure they are normal, checking for cracks or discharge marks on the casing, and checking for discoloration of the respirator silicone. It is recommended to conduct a preventive test once a year to measure DC resistance, insulation resistance, and transformation ratio error, in order to promptly detect potential faults. Common faults such as local overheating, abnormal noise, or oil leakage require immediate shutdown for troubleshooting. Maintain good ventilation, clean up surrounding debris, and prevent small animals from entering and causing short circuits. Reasonable maintenance can significantly extend the service life of power transformers and ensure power supply continuity.

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