In some relays, the entire sampled data is kept for oscillographic records, but in the relay, only the fundamental component is needed for most protection algorithms, unless a high speed algorithm is used that uses subcycle data to monitor for fast changing issues.
The entire sampled data is kept for oscillographic records. This was in some relays. Only the fundamental component is needed for most protection algorithms. This was in the relay. A high speed algorithm is used that uses subcycle data to monitor for fast changing issues.