Table 18.1 provides an overview of synchronous generator protections, as discussed in
six different references. 1 Although not an exhaustive list, it is clear from this tabulation that
there are a relatively large number of conditions for which generators are provided special
protection. None of the cited references covers all of the items, which reflects the generator
owner preference for the importance of the different subjects. There are still other protective
systems that are used occasionally but are not shown at all in Table 18.1, and these will be
discussed briefly at the end of this section.