SAFETY APPARATUS AND MONITORING METHOD FOR A POWER TRANSFORMER, AND RELATED POWER TRANSFORMER

摘要

A safety apparatus suitable to be associated to and a method for monitoring a liquid-filled power transformer wherein there is provided a sensing device associated to an electronic unit. The sensing device is suitable to be at least partially immersed into the liquid and comprises at least one movable part displaceable by movements of the liquid; the electronic unit detects signals indicative of the actual position of the movable part and is arranged to elaborate, based on the detected signals, data related to actual conditions of the transformer and/or of its cooling liquid.