630A fuse - CT?


I have a 3-Phase System that I want to monitor.

However it has a 630A fuse on each phase.

What happens if a 600A CT ist overloaded? Is it destroyed? Is it just “limited” to 600A and I will not get a higher reading? Something else?


600A CT should be OK. With a 640A fuse the circuit should not be operating above about 500A for any time. General design is 25% safety. In any event, the CT should not be damaged.