PowerPacT M, P, and R-Frame circuit breakers offer a whole range of field installable accessories, allowing modifying the circuit breaker at any time in the design and build cycle. This current transformer is for applications requiring ground fault protection and metering. It is not for source ground return (SGR) or modified differential ground fault (MDGF) applications. It is for use with PowerPacT P-Frame circuit breakers. This current transformer is rated for 400A to 1600A and must be compatible with the rating of the circuit breaker. This product complies with UL standards.