Oil immersed transformer three-phase power distribution copper core coil is energy-saving and environmentally friendly, suitable for industrial and mining enterprises

Description :

  Oil immersed transformer is a static electrical equipment that uses insulating oil as a cooling and insulating medium, mainly used to change the AC voltage level, solve long-distance transmission losses and voltage matching problems of different electrical equipment. Its typical operating conditions include the distribution systems of urban power grids, industrial parks, mines, and large building complexes. This category works through the electromagnetic induction principle of the iron core and winding, and has the characteristics of strong overload capacity, good heat dissipation performance, and stable operation. It is an indispensable core component in the power system and widely used in distribution networks with voltage levels of 10kV and below.

  In terms of specifications, oil immersed transformers usually use iron cores made of cold-rolled silicon steel sheets stacked together, and the coils are mostly wound with oxygen free copper wire to ensure low loss and high efficiency. The shell is a corrugated oil tank or a plate type radiator structure, enhancing the heat dissipation area. The implementation standards follow national specifications such as GB 1094 series and GB/T 6451, and have complete indicators for short-circuit impedance, no-load loss, and load loss. The common rated capacity ranges from 30kVA to 2500kVA, with a high voltage side rated voltage of 10kV or 35kV and a low voltage side rated voltage of 0.4kV. The insulation level meets the requirements of lightning impulse withstand voltage, ensuring long-term reliable operation in harsh environments.

  When selecting, it is necessary to clarify the nature of the load, environmental temperature, and installation location. Suitable for outdoor column installation, pier installation, or indoor substations, especially suitable for scenarios with large load fluctuations and high requirements for overload capacity. If located in densely populated indoor areas with extremely high fire prevention requirements, it is recommended to compare dry-type transformers, which are maintenance free but have relatively weaker overload capacity and higher costs. Oil immersed transformers have advantages in cost-effectiveness and maintenance convenience, but attention should be paid to fire separation distance and oil tank setting. When purchasing, special attention should be paid to energy efficiency levels, and products that meet the new national standard's first or second level energy efficiency should be prioritized to reduce the operating costs throughout the entire lifecycle.

  Before installation, it is necessary to check the appearance for no damage, normal oil level, correct valve opening, and conduct insulation resistance testing and DC resistance measurement. Regularly inspect the oil temperature, color, and leakage during operation. It is recommended to conduct an oil sample test every six months to monitor breakdown voltage and micro water content. Daily maintenance includes cleaning radiator dust, tightening wiring terminals, and checking the integrity of the grounding system. Common faults such as gas relay operation and abnormal oil temperature rise require immediate shutdown to investigate whether there is a turn to turn short circuit or poor contact inside. Reasonable maintenance can significantly extend the service life of oil immersed transformers and ensure power supply continuity.

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