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Flicker Depending on Connection Types
Table 2-17
Flicker Depending on Connection Types in Power Systems
Measured
Quantity
Circuit
1-Phase
System
3-Wire
Network
(Delta)
(Balanced
(1I)
3-Wire
Network
(Delta)
Unbalanced
(3I)
3-Wire
Network
(Delta)
Unbalanced
(2I)
4-Wire
Network
(Star)
Balanced (1I)
4-Wire
Network
(Star)
Unbalanced
(3I)
Short-Term Flicker
Pst (a-n)
a-N
x
–
–
–
x
x
Pst (b-n)
b-N
–
–
–
–
–
x
Pst (c-n)
c-N
–
–
–
–
–
x
Pst (a-b)
a-b
–
x
x
x
–
–
Pst (b-c)
b-c
–
x
x
x
–
–
Pst (c-a)
c-a
–
x
x
x
–
–
Long-Term Flicker
Plt (a-n)
a-N
x
–
–
–
x
x
Plt (b-n)
b-N
–
–
–
–
–
x
Plt (c-n)
c-N
–
–
–
–
–
x
Plt (a-b)
a-b
–
x
x
x
–
–
Plt (b-c)
b-c
–
x
x
x
–
–
Plt (c-a)
c-a
–
x
x
x
–
–
Instantaneous Flicker Sensation
Pinst (a-n)
a-N
x
–
–
–
x
x
Pinst (b-n)
b-N
–
–
–
–
–
x
Pinst (c-n)
c-N
–
–
–
–
–
x
Pinst (a-b)
a-b
–
x
x
x
–
–
Pinst (b-c)
b-c
–
x
x
x
–
–
Pinst (c-a)
c-a
–
x
x
x
–
–
AC Operational Values
Function Description
Following basic AC operational values are gathered during measurement and shown both on the Web pages
and numerically on the display.
•
Frequency f
•
Voltage magnitudes Va, Vb, Vc, Vab, Vbc, Vca
•
Current magnitudes Ia, Ib, Ic
•
Neutral-point displacement voltage V
N
•
Average value of the voltages Vavg
•
Average value of the phase-phase voltages Vavg ph-ph
•
Negative-sequence unbalance ratio u2 and i2
•
Neutral current I
N
•
Average value of the currents Iavg
•
Phase angles φab V, φca V, φab I, φca I
2.5.4.5
2.5.5
2.5.5.1
Basic Functions
2.5 AC Measurement
56
SICAM, SICAM P850/P855 7KG85X, Manual
E50417-H1040-C482-A9, Edition 03.2022
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