Technical description
4 Measurement functions
4.4 Symmetric components
VM55.EN005
VAMP 24h support phone +358 (0)20 753 3264
103
Figure 4.4-1 shows a geometric solution. The input values have been scaled
with
3/100 to make the calculation easier.
Example 1, single phase injection
U
N
= 100 V
Voltage measurement mode is "2LL+Uo+LLy/LNy".
Injection:
U
A
= U
12
= 100 V
U
B
= U
23
= 0
33
33
0
100
0
100
3
1
0
0
100
1
1
3
1
2
2
1
a
a
U
U
U
1
= 33 %
U
2
= 33 %
U
2
/U
1
= 100 %
When using a single phase test device, the relative unbalance
U
2
/U
1
will always be 100 %.
