The epoxy immersed and the oil immersed transformer ,which one is more durable

       Epoxy-immersed transformers and oil-immersed transformers have their own advantages and disadvantages.

     Epoxy immersed transformers are preferred in certain applications because they are completely sealed and do not require regular oil maintenance. They also have a lower risk of environmental contamination in the event of a leak or malfunction. However, epoxy immersed transformers may be more expensive and may have limited cooling methods, which may affect their lifespan and durability.

     An oil-immersed transformer is an electrical transformer that uses oil as a coolant and insulating medium. These transformers consist of a core, windings and insulating material, all of which are completely immersed in insulating oil. There are several advantages to using insulating oil. First, the oil provides good insulation against arcing and corona discharges, which can cause damage to transformer windings. Second, the oil helps cool the transformer, thereby dissipating the heat generated during operation. This increases the efficiency of the transformer and extends its service life.

     The oil used in these transformers is usually mineral oil, although other types of oil such as silicone and vegetable oils can also be used. The oil is selected based on its dielectric strength and ability to withstand high temperatures without decomposing.Oil-immersed transformers have been used for a long time and their quality has been fully verified. They are cheaper than epoxy immersed transformers and have better heat dissipation, which can increase their durability and lifespan. However, oil-immersed transformers rely on oil as a cooling and insulating medium, which can cause environmental problems if there is a leak or failure. They also require regular oil maintenance.

     Overall, the durability of a transformer depends on various factors such as operating conditions, maintenance and the quality of materials used. Both epoxy-immersed and oil-immersed transformers have good durability and longevity if properly designed, manufactured and maintained.