What Are The Precautions for Operation of Oil-immersed Transformer?

Oil-immersed transformers can be used for grounding and multipoint grounding. In fact, if the medium oil-immersed transformer is grounded more, a current circuit will be generated, which will lead to the failure of the iron core, local heating, oil decomposition of the oil-immersed transformer, and deformation of the silicon steel core, making it difficult for the oil-immersed transformer to work normally.

The iron core of the oil-immersed transformer is grounded a lot. There are two processing methods. One is to check out of the box. Using this simple and straightforward method, remove the cover connection location of the oil immersed transformer. At the same time, confirm the use status of the insulating board paper, find out the influence on normal use in time, and exchange it. Another method is to connect a DC current pulse and use the heating effect of the DC current to burn most of the core ground point. Usually, the redundant contact point problem can be solved after 4 to 5 times the DC current impulse.

The moisture of the oil-immersed transformer may be the reason why the internal water leakage of the oil-immersed transformer and the external water pipes and parts enter the mailbox and insulating oil. The insulation of oil-immersed transformers is affected by moisture, which affects the safe operation of oil-immersed transformers. There are many reasons for oil leakage of oil-immersed transformers, and different forms of welding treatment are required for oil leakage caused by the reasons. Cracks on flat surfaces can be handled directly by welding. Cracks on different planes should be welded with iron plates according to the shape of the main shaft to prevent oil leakage in the future. Different oil spill areas require different treatment methods. The tank must be welded directly to the flat area after a leak. Corner cracks must first find the hole location, and then carry out special welding.