63230-300-212 Chapter6—Alarms
April 2001 AlarmConditions andAlarm Numbers
97
© 2001 Schneider Electric All Rights Reserved
054 Leading Power Factor
Theleading power factoralarm will occur whenthe test register value becomesmore leading than
thepickup setpoint(such as closer to 0.010)and remains more leadinglong enough to satisfythe
pickupdelay period.W henthe value becomes equalto or less leading thanthe dropout setpoint,
thatis 1.000, and remains less leadingfor the dropoutdelay period, the alarm willdropout. Both
thepickup setpoint and thedropout setpoint mustbe positive values representingleading power
factor. Enter setpoints as int eger values representi ng power factor in thousand ths. For example, to
definea dropout setpoint of 0.5, enter500. Delays are in seconds.
055 Lagging Power Factor
Thelagging power factoralarm will occur whenthe test register value becomesmore lagging than
the pickup setpoint (suc h as closer to –0.010)and remains more lagginglong enough to satisfythe
pickupdelay period.W henthe value becomes equalto or less lagging thanthe dropout setpoint,
thatis 1.000, and remains less laggingfor the dropoutdelay period, the alarm willdropout. Both
thepickup setpoint and thedropout setpoint mustbe positive values representinglagging power
factor. Enter setpoints as int eger values representi ng power factor in thousand ths. For example, to
definea dropout setpoint of –0.5, enter 500. Delays are in se conds.
High Speed
010 OverValue Alarm
If thetest register valueexceeds the setpointlong enough to satisfy thepickup delay period,the
alarmcondition willbe true. When the valuein the test registerfallsbelow the dropout setpointlong
enoughto satisfy the dropoutdelay period, the alarmwill dropout. Pickupand dropout setpoints
are positive,delaysare in hundreds of milliseconds.
011 Over Power Alarm
Ifthe absolutevalue in the test registerexceedsthe setpoint long enoughto satisfy the pickupdelay
period,the alarm condition will be true.When the value in the test registerfalls below thedropout
setpointlong enoughto satisfy the dropoutdelay period,the alarm will dropout. Pickupand dropout
setpointsare positive,delays are in hundredsof milliseconds.
012 OverReverse PowerAlarm
Ifthe absolutevalue in the test registerexceedsthe setpoint long enoughto satisfy the pickupdelay
period,the alarm condition will be true.When the value in the test registerfalls below thedropout
setpoint long enough to sat isfy the dropout delay peri od, the alarm will drop out. This alarm will only
holdtrue for reversepower conditions. Positivepower valueswill not cause thealarm to occur.
Pickupand dropout setpointsare positive,delays are in hundredsof milliseconds.
020 UnderValue Alarm
If thetest register valueis below the setpoint longenough to satisfy thepickup delay period,the
alarmcondition will be true.When the value in the testregister rises abovethe dropout setpoint
longenough to satisfy the dropoutdelay period, thealarm will dropout. Pickupand dropout
setpointsare positive,delays are in hundredsof milliseconds.
021 UnderPower Alarm
Ifthe absolute valuein the test registeris below the setpointlong enough to satisfythe pickup delay
period,the alarm conditionwill be true. Whenthe value in thetest register rises abovethe dropout
setpointlong enoughto satisfy the dropoutdelay period,the alarm will dropout. Pickupand dropout
setpointsare positive,delays are in hundredsof milliseconds.
051 PhaseReversal
Thephase reversalalarm will occurwhen everthe phase voltagewaveformrotation differsfrom the
default phase rotation. T he ABC phase rotation is assumed to be n ormal. If a CBA normal phas e
rotation is normal, the us er should reprogram the circuit m onitor’s phase rotation ABC to CBA
phaserotation. The pickupand dropout setpointsand delays for phasereversal do no apply.
052 PhaseLoss, Voltage
The phase loss voltag e alarm will occur whe n any one or two phase volt ages (but not all) fall t o the
pickup value and remain at or below the pickup value long enough to satis fy the specified pickup
delay.When al l of the phases remain at or above t he dropout value for the d ropout delay period, or
whenall of the phases drop belowthe specified phase losspickup value,the alarm will dropout.
Pickupand dropout setpointsare positive,delays are in seconds.
053 PhaseLoss, Current
Thephase loss currentalarm will occur when anyone or two phase currents(but not all) fallto the
pickup value and remain at or below the pickup value long enough to satis fy the specified pickup
delay.When al l of the phases remain at or above t he dropout value for the d ropout delay period, or
whenall of the phases drop belowthe specified phase losspickup value,the alarm will dropout.
Pickupand dropout setpointsare positive,delays are in hundredsof milliseconds.
Table 6 –4: Alarm Types
Type Description Operation