Research and Application of an Electromechanical Dual Protection System with Intelligent Protector and DCS Coordination

This study aims to address the issues of "delayed response, single functionality, and lack of early warning" in traditional motor protection schemes for polylactic acid production. Based on a case, the failure mechanisms of centrifugal pumps and gear pumps were analyzed, and a three-level closed-loop protection system (early warning-intervention-protection) integrating "intelligent protector and DCS" was designed. After the transformation, the response speed of protection increased by tens of times, with five effective early warnings achieved within one month, preventing motor burnout and unplanned shutdowns.