ESA encompasses many different electrical analysis techniques including current signature analysis (CSA/MCSA), voltage signature analysis (VSA), and instantaneous power signature analysis (IPSA). Combining these different techniques provides a comprehensive characterization of motor and generator health that can be used to inform maintenance and replacement decisions.
ESA can be applied in a variety of industries, on basically any type of motor or generator. In the nuclear industry, critical motors associated with feedwater pumps, reactor coolant pumps, and even CRDM motor-generator sets are ideal candidates for the additional condition monitoring provided by ESA. In addition to nuclear power plants, wind turbines are another common application for ESA, as you can monitor the health of “up-tower” components from the tower base without having to install additional equipment.