Just look at the current/time plots for them.So why wouldn't a 13amp fuse blow before a 32amp circuit breaker?
Typically with a fuse and larger MCB you will find generally:
- The fuse blows first (up for PFC up to the MCB magnetic trip point)
- Then you find the MCB trips first, and the fuse survives (if MCB I2t let-through is below the per-arcing I2t of the fuse)
- At very high PFC you find the MCB trips but the fuse has also blown (as the blows in under the time for the MCB to operate, typically 5-10ms).