Schneider Electric 4000 manual Pickup Setpoint Dropout Setpoint, Pickup Delay Dropout Delay

Chapter 6—Alarms	63230-300-212
About Alarms			April 2001
(EV2)		(Max2)

(EV1)

(Max1)

Figure 6–1: Sample alarm log entry

	Max2
Max1
Pickup Setpoint
Dropout Setpoint
∆T	∆T
Pickup Delay	Dropout Delay
EV1	EV2
	Alarm Period

Figure 6–2: How the circuit monitor handles setpoint-driven alarms

EV1—The circuit monitor records the date and time that the pickup setpoint and time delay were satisfied, and the maximum value reached (Max1) during the pickup delay period (∆T). Also, the circuit monitor performs any tasks assigned to the event such as waveform captures or forced data log entries.

EV2—The circuit monitor records the date and time that the dropout setpoint and time delay were satisfied, and the maximum value reached (Max2) during the alarm period.

The circuit monitor also stores a correlation sequence number (CSN) for each event (such as Under Voltage Phase A Pickup, Under Voltage Phase A Dropout). The CSN lets you relate pickups and dropouts in the alarm log. You can sort pickups and dropouts by CSN to correlate the pickups and dropouts of a particular alarm. The pickup and dropout entries of an alarm will have the same CSN. You can also calculate the duration of an event by looking at pickups and dropouts with the same CSN.

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