Siemens SICAM 7KG85X - Flicker Depending on Connection Types; AC Operational Values; Function Description

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