The E683 flexible rope style CTs measure AC current up to 5000 Amps. The coil opens at the connector junction for fast and easy installation onto an existing cable or buss-bar. The twist locking feature makes the connection secure and the flexible core makes it easy to fit in tight enclosures. The E683 series works exclusively with the E2xxx & E5xxxA power and energy meters. These meters have a built in power supply and integrator, so CT connection is fast and simple.