There are many issues that cause transformer failure. Aging, internal or external faults, moisture ingress, or temperature extremes can cause damage to the liquid or solid insulation. This damage not only threatens stability, but re-energizing a faulted transformer is a safety risk for field personnel. How can you know when the transformer tank is over-pressured before restoring power to the transformer?
Case Study VII: Dielectric measurement in a wind farm
By measurements, the actual operation conditions to which a series of transformers was subjected, has been verified. This helped to demonstrate that the technical specification of the transformers were not appropriate to the real
environment in which they should operate.