Page 126 - Sace Emax 2 Manual for design engineers

ABB | SACE Emax 2
Spikes The Spikes counter should be understood as increase of the RMS value of the line-to-line voltage above the
set V Spike Threshold threshold for less than 40 ms (short time voltage spike).
The counter is available in the two submenus Counters - Day -1 and Counters - Cumulative (previous day or
cumulative)
NOTE: Since the counter is based on the RMS value calculation, two rapid voltage spikes of
equal duration may be evaluated differently, depending on their amplitude:
Increase detected Increase not detected

t t

Additional List
Counters Description
(Interruptions)
Last time stamp Date and time of last recording of the Spikes counter
Last value Value of last swell above Spikes [V] threshold
Last duration Duration of last swell above Spikes [ms] threshold
Actual number of S. Spikes count for the current day
Actual [day -2 ... day -7] Spikes count of the last seven days of activity, calculated using the internal
number of S. clock of the unit

Sags Certain counters relating to sags are available in the Counters - Day -1 and Counters - Cumulative submenus:
Counters (Interrup- Description
tions)
Counts the number of times that any line-to-line voltage falls below the V sag
Sags Short
Th Short threshold for longer than V sag dur Short
Counts the number of times that any line-to-line voltage falls below the V sag
Sags Middle
Th Middle threshold for longer than V sag dur Middle
Counts the number of times that any line-to-line voltage falls below the V sag
Sags Long
Th Long threshold for longer than V sag dur Long

The count refers to the reference menu interval (previous day or cumulative)
NOTE: since an event may fall under more than one category, only the counter of the main
type (Long > Middle > Short) is increased
Additional List
Counters
(Interruptions) Description
Last time stamp Date and time of last recording of the Sags Short counter
Sags Middle Value of last sag below the Sags Short [V] threshold
Sags Long Duration of last sag below the Sags Short [ms] threshold
Actual number of S. Sags Short count for the current day
Actual [day -2 ... day -7] Sags Short count of the last seven days of activity, calculated using the internal
number of S. clock of the unit

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