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4.4 Symmetric components
4 Measurement functions
Technical description
102
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VM55.EN005
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 %.
Example 2, two phase injection with adjustable phase angle
U
N
= 100 V
Voltage measurement mode is "2LL+Uo+LLy/LNy".
Injection:
U
A
= U
12
= 100 V
0°
U
B
= U
23
= 100/
3 V
150° = 57.7 V
150°
30
2
.
19
30
5
.
38
30
3
/
1
30
3
/
2
3
100
30
3
/
1
0
1
90
3
/
1
0
1
3
100
150
3
/
100
0
100
1
1
3
1
2
2
1
a
a
U
U
U
1
= 38.5 %
U
2
= 19.2 %
U
2
/U
1
= 50 %
Содержание VAMP 55
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