Standard alarms have a detection rate equal to the 50/60 meter cycle, which is nominally 1 second if the meter’s frequency setting is configured to match the system frequency (50 or 60 Hz).
Many of the standard alarms are three-phase alarms. Alarm setpoints are evaluated for each of the three phases individually, but the alarm is reported as a single alarm. The alarm pickup occurs when the first phase exceeds the alarm pickup magnitude for the pickup time delay. The alarm is active as long as any phase remains in an alarm state. The alarm dropout occurs when the last phase drops below the dropout magnitude for the dropout time delay.