Schneider Electric HRB1684301-01 user manual Digital alarms, Standard alarms

Chapter 10—Alarms PowerLogic™ PM5500 series user manual

Digital alarms

Digital alarms monitor the ON or OFF state of the meter’s digital inputs (S1 to S4).

Digital alarms

Alarm label	Description
Digital Alarm S1	Digital input 1
Digital Alarm S2	Digital input 2
Digital Alarm S3	Digital input 3
Digital Alarm S4	Digital input 4

Digital alarm with setpoint delay

To prevent false triggers from erratic signals, you can set up a time delay for the digital alarm.

Adding setpoint delays to a digital alarm

1
ΔT1	ΔT2
0
	ΔT3
EV1	EV2

APickup setpoint (1 = ON)

BDropout setpoint (0 = OFF)

∆T1 Pickup time delay (in seconds)

EV1 Start of alarm condition

∆T2	Dropout time delay (in seconds)
EV2	End of alarm condition
∆T3	Alarm duration (in seconds)

NOTE: To prevent filling the alarm log with nuisance alarm trips, the digital alarm is automatically disabled if the digital input changes state more than 4 times in one second or more than 10 times in ten seconds. See “Digital input setup” on page 72 to adjust the Debounce setting for the digital inputs.

Standard alarms

Standard (1-Sec) 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). These setpoint-driven alarms monitor certain behaviors, events or unwanted conditions in your electrical system.

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.

Standard (1-Sec) alarms

Alarm label		Valid range and resolution1		Units
ION Setup	Meter display	ION Setup	Meter display
Over Phase Current	Over Current, Ph	0.000 to 99999.000	0 to 99999	A
Under Phase Current	Under Current, Ph	0.000 to 99999.000	0 to 99999	A
Over Neutral Current	Over Current, N	0.000 to 99999.000	0 to 99999	A

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