Automatic sensing of changes in transformer dielectrics

The performance of transformers depends directly on the quality of the dielectric medium (fluid). However, this dielectric fluid degrades with use and, at some point, will change sufficiently that the transformer will no longer operate properly. In some cases, the degradation of the dielectric fluid can cause catastrophic failure of the transformer. Therefore, methods to automatically sense the condition of the transformer dielectric material are both useful and compelling. A new device has been developed that allows automatic sensing of the transformer dielectric. This device is small and simple, yet demonstrates a surprising capability to detect subtle changes in the material. The device also detects changes in other nonconductive fluids such as fuels (oils, gasoline, diesel, etc.), polymers, and even for sensing the water content in low conductivity fluids.