Why alternator is much less likely to burn out on sustained short circuit than a separately excited dc shunt generatror?

An alternator is less likely to burn out during a sustained short circuit because it operates with a rotating magnetic field and can adjust its output based on load conditions. In contrast, a separately excited DC shunt generator has a fixed field excitation, which can lead to excessive current flow and overheating when a short circuit occurs. Additionally, the alternator's design allows for built-in protective features like circuit breakers and automatic voltage regulation, further reducing the risk of damage. These factors collectively contribute to the alternator's enhanced durability under fault conditions compared to a DC shunt generator.