What is “Over excited” in electrical system?

"Over excited" in an electrical system means that the magnetic field created by the excitation current is stronger than the normal or rated level.
For instance, in a generator, over excitation can result in an output voltage that is higher than the intended value. This could cause problems for connected electrical equipment that is not designed to handle such high voltages.
In transformers, over excitation can lead to excessive heating, increased core losses, and potential damage to the insulation.
It's important to control and avoid over excitation as it can have adverse effects on the performance, reliability, and lifespan of electrical components and the overall stability of the power system.