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ABB | SACE Emax 2
Ekip Touch protection release | 16 - Hi-Touch measurements
139 | © 2013
ABB |
1SDH001000R0002 - L7804
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Short duration voltage drops
The short duration voltage drop is to be understood as the reduction of any phase-to-phase
voltage below the set threshold, for a duration less than 40 ms.
The alarm threshold is expressed as % Un.
The corresponding alarm counter is called
Interruptions
.
Short duration voltage increases
The short duration voltage increase is to be understood as the increase in any phase-to-phase
voltage above the set threshold, for a duration less than 40 ms.
The alarm threshold is expressed as % Un.
The corresponding alarm counter is called
Spikes
.
Slow voltage drops
The slow voltage drop is the lowering of any phase-to-phase voltage, under one of the set
thresholds, for a duration greater than the set time.
The corresponding alarm counter is called
Sags
.
Parameters that can be set for the check are:
Parameter
Description
Sag Threshold
(First Class)
Defines the first alarm threshold.
It is expressed as % Un.
Sag Time (First
Class)
In the event of dropping under the first alarm threshold, it defines
the time beyond which the alarm counter is increased.
Sag Threshold
(Second Class)
It defines the second alarm threshold.
It is expressed as % Un.
Sag Time (Second
Class)
In the event of dropping under the second alarm threshold, it
defines the time beyond which the alarm counter is increased.
Sag Threshold
(Third Class)
Defines the third alarm threshold.
It is expressed as % Un.
Sag Time (Third
Class)
In the event of dropping under the third alarm threshold, it defines
the time beyond which the alarm counter is increased.
IMPORTANT: in order to intercept all the voltage drop events (both slow and
short duration drops), it is recommended to set:
•
Sag Threshold (First Class) = Interruptions threshold.
•
Sag Time (First Class) = 40ms.
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Содержание SACE Emax 2
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