Siemens 7KG85 Series - Harmonics; Measured Quantities of Power Depending on the Connection Types

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)
φc c – – – – – x
φVI a+b+c – x x x x
1/3 Σ φVI
ph
Frequency
System
frequency
a x x x x x x
Harmonics
Table 2-14 Harmonics Depending on the Connection Types in Power Systems
Measured Quan-
tity
(x = 1 to 40)
x = 1: Funda-
mental
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)
Magnitude of Voltage Harmonics
H_Va-x a-N x – – – x x
H_Vb-x b-N – – – – – x
H_Vc-x c-N – – – – – x
Magnitude of Harmonic Currents
H_Ia-x a x x x x x x
H_Ib-x b – – x x – x
H_Ic-x c – – x x – x
THDS, Voltage
THDS_Va a-N x – – – x x
THDS_Vb b-N – – – – – x
THDS_Vc c-N – – – – – x
THDS_Vab a-b x – – – x x
THDS_Vbc b-c – – – – – x
THDS_Vca c-a – – – – – x
THDS, Current
THDS_Ia a x x x x x x
THDS_Ib b – – x x – x
THDS_Ic c – – x x – x
Measured Quantities of Power Depending on the Connection Types
Table 2-15
Measured Quantities of Power Depending on the 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)
Active Power
Pa a x – – – – x
Pb b – – – – – x
2.5.4.2
2.5.4.3
Basic Functions
2.5 AC Measurement
SICAM, SICAM P850/P855 7KG85X, Manual 53
E50417-H1040-C482-A9, Edition 03.2022