Schneider Electric PM5300 Digital Alarms, How the power meter handles setpoint-driven alarms

PowerLogic™ PM5300 series user guide Chapter 7—Alarms

Many of the 1-second 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. See Figure 7–2below.

Figure 7–2: How the power meter handles setpoint-driven alarms

Pickup

Setpoint

Dropout

Setpoint

Max2

Max1

	ΔT				ΔT
Pickup Delay				Dropout Delay
		EV1				EV2
			Alarm Period

EV1—The power meter 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 (ΔT). Also, the power meter performs any tasks assigned to the event such as operation of a digital output.

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

Digital Alarms

The power meter has two digital alarms for alarming on status input status. By default, the digital alarms are active when the associated status input is ON. The pickup and dropout time delays are configured in seconds.

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