The normal operation of the continuous exposure to climatic factors , high temperatures achieved by these teams , continuous vibration and electrical effects of overvoltage and overcurrent , transformers make the constructive elements of the transformer reach deteriorating and needed revision maintenance and replacement . Within the service and maintenance of transformers perform: change of packing , painting , silica gel , some protection elements in the control system and mechanical protection , ensuring the proper functioning and preservation of equipment

The dielectric oil removes the heat generated by the coils and the magnetic core , soon to dispel the outside , thus controlling the temperature of the transformer. The main functions of the dielectric transformer oil are cool , isolate and carry information. There are two large groups of analysis transformer oil : A) Gas chromatographic analyzes to determine the operating status of the transformer B ) Physicochemical analysis to determine the state of insulating oil and the both solid and liquid insulation transformer .