ABB 615 Series ANSI, Technical Manual

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Section 8
1MAC050144-MB C
Measurement functions
580 615 series ANSI
Technical Manual
for dips, but the different limits for the signal magnitude and times and the inherent
operating zone change (here, Voltage swell set x > 1.0 xVn) are applied.
Figure 313: Voltage swell operational regions
For interruption, as shown in Figure 314, there is only one magnitude limit but four
duration limits for interruption classification. Now the event and counter type depends
only on variation duration time.
Figure 314: Interruption operating regions
Generally, no event detection is done if both the magnitude and duration requirements are
not fulfilled. For example, the dip event does not indicate if the TRMS voltage magnitude
remains between Voltage dip set 3 and Voltage dip set 2 for a period shorter than VVa dip
time 3 before rising back above Voltage dip set 3.
The event indication ends and possible detection is done when the TRMS voltage returns
above (for dip and interruption) or below (for swell) the activation pickup limit. For
example, after an instantaneous dip, the event indication when the voltage magnitude
Voltage swell set 3
Voltage swell set 2
Voltage swell set 1
Voltage
xVref
Time (ms)
0
0
VVa Dur Max VVa swell time 3 VVa swell time 1 VVa swell time 2
1.40
Instantaneous
swell
Temporary
swell
Momentary
swell Maximum duration
swell
1.00
Voltage Int set
Voltage
xVref
Time (ms)
0
0
VVa Dur Max
VVa Int time 3
VVa Int time 1 VVa Int time 2
1.00
Momentary
interruption
Sustained
interruption
Temporary
interruption
Maximum duration
interruption