current transformer 9a615 3 2500 5aProduct Description The 9A615. 3 2500 5A is a robust, high capacity current transformer designed for precise current measurement and protection in very high load electrical systems, such as those found in power plants, substations, and heavy industrial facilities. With a primary current rating of 2500 A and a standard 5 A secondary output, this CT ensures accurate signal transformation for energy metering and protective relaying. Its durable design,