Of a sort. If it's a phase mismatch of a few degrees, the generator may attempt to physically rotate to match the phase.
This kills the generator. Also, less amusingly, anyone nearby at the time.
If it's a larger mismatch, then that's more likely to fry the wiring before too much other damage happens. On rare occasions generators get connected while they are (exactly) 180 degrees out of phase; this is a dead short, and its internals will instantly vaporize. The vaporized copper may then proceed to explore the outer limits of the generator's physical integrity.
(Disclaimer, etc: I've only worked with DC generation, AC would be somewhat different especially if it's three-phase.)
This kills the generator. Also, less amusingly, anyone nearby at the time.
If it's a larger mismatch, then that's more likely to fry the wiring before too much other damage happens. On rare occasions generators get connected while they are (exactly) 180 degrees out of phase; this is a dead short, and its internals will instantly vaporize. The vaporized copper may then proceed to explore the outer limits of the generator's physical integrity.
(Disclaimer, etc: I've only worked with DC generation, AC would be somewhat different especially if it's three-phase.)