Oil Testing Set
Oil and other insulating liquids suffer from electrical and mechanical stresses while a transformer is in operation. In addition there are contamination caused due to chemical interactions with winding and other solid insulation, catalyzed by high operating temperature. As a result the original chemical properties of Transformer Oil changes gradually, rendering it ineffective for its intended purpose after many years.
Hence this oil has to be periodically tested to ascertain its basic electrical properties, and make sure it is suitable for further use or initiate necessary actions like filtration/regeneration by OIL TESTING SET.