Summary Update of Practices on Breaker Failure Protection

In the July/August 1970 issue of IEEE Transactions on Power Apparatus and Systems, an IEEE committee report was published entitled "Local Backup Relaying Protection." That report compiled the results of a survey on the current preferences on duplicate relays, dc and ac sources, control power, and breaker failure protection. Since that time, the industry has gained experience with breaker failure schemes and practices are much better defined. These practices have been compiled and are submitted in this report.