Improving the power system safety in hospitals by means of periodical sfra tests on medical isolation transformers

Abstract

The paper has the main aim of demonstrating a possible use of the well consolidated monitoring SFRA (Sweep Frequency Response Analysis) technique for preventive maintenance procedure applied to isolation medical transformers operating in hospitals’ group 2 medical locations. In particular, a novel testing platform has been implemented that can perform the monitoring test on IT-M during normal periodical verification provided by specific standard. In the paper, some results of the practical application of such a platform to several transformers in currently in operation in various Italian hospitals have been reported.