Siemens SICAM 7KG85X - Measurands; Operational Measured Quantities Depending on the Connection Types

Measurands
Operational Measured Quantities Depending on the Connection Types
Table 2-13 Operational Measured Quantities Depending on the Connection Types in Power Systems
(10/12 cycles)
Measured Quan-
tity
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)
Voltage
Va a-N x – – – x x
Vb b-N – – – – – x
Vc c-N – – – – – x
Vab a-b – x x x – x
Vbc b-c – x x x – x
Vca c-a – x x x – x
V
N
a+b+c – – – – – x
Vavg
a-N
b-N
c-N
– – – – –
1/3 Σ V
ph-n
Vavg
a-b
b-c
c-a
–
1/3 Σ V
ph-ph
– –
Vunbal
a-b
b-c
c-a
– x x x – x
Current
Ia a x x x x x x
Ib b – – x x – x
Ic c – – x x – x
I
N
a+b+c – – – – – x
Iavg a+b+c – – x x –
1/3 Σ I
ph
Iunbal a+b+c – – x x – x
Fundamental Power Factor
cos φ(a) a x – – – – x
cos φ(b) b – – – – – x
cos φ(c) c – – – – – x
cos φ a+b+c – x x x x
1/3 Σ cos φ
ph
Power Factor
PFa a x – – – – x
PFb b – – – – – x
PFc c – – – – – x
PF a+b+c – x x x x
1/3 Σ PF
ph
Phase Angle
φa a x – – – x x
φb b – – – – – x
2.5.4
2.5.4.1
Basic Functions
2.5 AC Measurement
52 SICAM, SICAM P850/P855 7KG85X, Manual
E50417-H1040-C482-A9, Edition 03.2022