Protection against loss of synchronism on synchronous
machines, based on calculated active power.
2 types of operation:

• tripping according to the equal-area criterion, time-delayed
• tripping according to power swing (number of active power swings):

*suitable for generators capable of withstanding high electrical and mechanical constraints

*to be set as a number of rotations.

The 2 types of operation may be used independently or at the same time.

Released for: Schneider Electric Saudi Arabia