But, it's not.
However, my 3 hp VFD calls for a circuit breaker of 20 amps or 30 amps, or a fuse of 30 amps or 40 amps.
That may give you some idea. I'd guess that you'd at least double the breaker size for 7.5 amps.
You might want to call one of the VFD suppliers and ask them. Of call GE. Their tech support number is listed in my VFD manual.