GlobeCore / Oil Heating / Transformer Oil Heating

Transformer Oil Heating

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This article looks into when oil heating for use in transformers is necessary and discusses the equipment needed.

When transformer oil heating is necessary

The first reason for oil heating is due to the changes of viscosity with the temperature. The higher the temperature, the lower the viscosity and visa versa. Oil pumping may be difficult in low temperatures. Heating can alleviate this problem. Viscosity also influences the cooling of transformers with natural and forced oil circulation.

GlobeCore transformer oil heating equipment

Oil heaters are specifically designed for oil heating. These units are equipped with stip heaters, which have several important benefits:

  • small size, making the heating system compact and easily transportable;
  • low heat capacity;
  • no overheating;
  • simple servicing and operation.

Oil heaters are also used in the CMM type machines. It is installed to facilitate the removal of water and gases from the oil, along with a vacuum system. These systems are also equipped with filters to extract particulate matter from the oil.

Oil heating is a part of the complete oil regeneration process in the CMM-R units. The machines pump the oil through filters, process it under vacuum and run it through a special sorbent. The latest stage deserves a better look. While filtration, heating and vacuum can remove particulate matter, water and gases from the oil, they are ineffective against oil aging and oxidation products. It is impossible to fully restore oil without this stage. Therefore, oil passes through columns filled with a microporous sorbent, which captures the aging products. The oil is clarified, and its chemical parameters are restored. Regenerated oil can be reused as an insulator and coolant in power transformer again.

Oil heating is an important part of transformer oil purification and regeneration. It can be applied separately by a stand-alone heating system (such as the PPM), but is usually included in oil processing machines.

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