© 2008 Siemens Energy & Automation, Inc. All Rights Reserved.
ACCESS 9340 and 9360 Meters PMCM-9340D-0208
Chapter 6—Basic Alarms 2/2008
EN–74
EV1—The 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 meter performs
any tasks assigned to the event such as waveform captures or forced
data log entries.
EV2—The 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.
The meter 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.
Figure 6–2: How the meter handles setpoint-driven alarms
PLSD110143
EV1
Max1
EV2
Max2
Pickup
Setpoint
Dropout
Setpoint
Pickup Delay
Alarm Period
Dropout Delay
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