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5.4.8
Calculation of voltage imbalances (TRIDENT 3U3V)
The rate of imbalance measured by TRIDENT 3U3V is, classically, equal to the ratio of the RMS
values of the inverse and direct components.
The rate of unbalance that is commonly used is defined by the ratio |Vi|/|Vd |, modulus of the
inverse component over the modulus of the direct component.
TRIDENT 3U3V calculates the unbalance rate from the mean phase-to-neutral voltage values over
1second:
)
V
V
(V
1/3
)
V
V
V
V
V
V
V
V
(V
1/9
Taux
3
2
1
1
3
3
2
2
1
2
3
2
2
2
1
