What is the role of a molecular sieve in transformer oil for power transformers?

The role of a molecular sieve in transformer oil for power transformers is to remove moisture and other polar contaminants from the oil. Molecular sieves are porous materials that selectively adsorb water molecules, thereby enhancing the dielectric strength and overall performance of the transformer oil. By maintaining the purity of the transformer oil, molecular sieves help to prolong the lifespan of power transformers and ensure reliable operation.