current transformer 7a412 3 800 5aProduct Description The 7A412. 3 800 5A is a high capacity current transformer designed for precision current measurement and protection in heavy duty electrical systems. With a primary current rating of 800 A and a standard secondary output of 5 A, this model is engineered for applications in industrial substations, energy monitoring systems, and protective relay schemes. It offers a robust, compact design with excellent thermal and electrical