VAMP VAMP 55, Installation, Operation And Configuration Instructions, Page: 104 / 186

4.4 Symmetric components 4 Measurement functions Technical description
104
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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 %
Figure 4.4-2 shows a geometric solution. The input values have been scaled
with  3/100 to make the calculation easier.