ABB PQFS Installation, Operation And Maintenance Instructions page 152

∆ T
ϕ
360
= ∗ °
1
T
For an inductive and non-regenerative load, the current signal should lag the voltage by
a phase shift lower than 90°.
8.6.2.3.2 Measurement of the CT in phase L2 and L3
The same operations as those described in the previous paragraph must be repeated
with the phase L2
For a balanced load (which is usually the case in most of the three phase systems), the
phase shift should be approximately the same for all the three phases.
Supply side
Figure 78: Connection of the scopemeter for checking CT in phase L2
152 Commissioning instructions  Manual Power Quality Filter PQFS
where T1 is the fundamental period duration.
U
I1
Figure 77: Phase shift evaluation between two waveforms
(Figure 78) and phase L3
L1 K
L2
L3
I k
N
∆T
T
1
(Figure 78
(Figure 79).
L
K L
K L
I k
I k
Positive direction
Ch1
and Figure 79)
Load side
N L1 L2 L3
X21.1
X21.2
X21.3
X21.4
PQF
X21.5
X21.6
X21.7
X21.8
X21.9
Ch2