ABB SACE Tmax XT2 - Page 109

1SDH002031A1002 ECN000092998 Rev. B SACE Tmax XT2 – XT4 | 109
Above V Th and
Below V Th
In the Counters - Day -1 and Counters - Cumulative submenus some counters are available for
sequence measurements:
Counters
Description
Over V Th
Counts the times when the average value of the positive sequence (with the sense of
rotation of the phases set: 1-2-3) or negative sequence (with the rotation direction of
the phases set: 3-2-1) exceeds V Threshold High. The count refers to the interval of
the menu of reference (previous day or cumulative)
Under V Th
Counts the times when the average value of the positive sequence (with the sense of
rotation of the phases set: 1-2-3) or negative sequence (with the rotation direction of
the phases set: 3-2-1) falls below V Threshold Low. The count refers to the interval of
the menu of reference (previous day or cumulative)
Supplemental list
Counters (Overvoltage)
Description
Last time stamp
Date and time referred to the last Over V Th counter record
Last value
Value of the last breach of the Over V Th threshold [V]
Actual number of O.
Count of Over V Th referring to the current day
Actual [day -2 ... day -7]
number of O.
Count of Over V Th detected in the last seven days of activity,
calculated using the unit's internal clock
Counters (Undervoltage)
Description
Last time stamp
Date and time referred to the last Under V Th counter record
Last value
Value of the last sag below the Under V Th threshold [V]
Actual number of O.
Count of Under V Th referring to the current day
Actual [day -2 ... day -7]
number of O.
Count of Under V Th detected in the last seven days of activity,
calculated using the unit's internal clock
V Interruption
(Interruption)
The counter V Interruption is to be understood as the reduction of the RMS value of the line-to-
line voltage below the V Interruption threshold. Th set, for a duration of less than 40 ms (short
voltage sag).
The counter is available in the two sub-menus Counters - Day -1 and Counters - Cumulative
(previous day or cumulative)
NOTE: Since the counter is based on the calculation of the RMS value, it is possible
that two interruption of equal duration may be evaluated differently depending on the
moment in which they occur:
Figure 27
Supplemental list
Counters (Interruptions)
Description
Last record
Date and time referred to the last V Interruption counter record
Last value
Value of the last sag below the V Interruption threshold [V]
Last Duration
Duration of the last sag below the V Interruption threshold [ms]
Actual number of I.
Count of V Interruption referring to the current day
Actual [day -2 ... day -7]
number of I.
Count of V Interruption detected in the last seven days of activity,
calculated using the unit's internal clock