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Voltage threshold value monitoring
Transformat_angle
r0094
VSM inp u1-u2
2
r3661
VSM inp u2-u3
r3662
α / β
( )
² x
Current threshold value monitoring
VSM CT 1 I_act
r3671
1
VSM CT 2 I_act
r3672
VSM CT 1 I_act
r7310[0...n]
1
VSM CT 2 I_act
r7311[0...n]
1 2
DO: A_INF, R_INF
Line transformer (r0108.4 = 1) - Line filter monitoring
y
t
U thresh
U
β,max p3679[0]
U thresh
y
p3678[0]
t
2
x
2/p0211
T 0
T 0
T
Parallel connection
I thresh
r0108.15
p3678[1]
0
1
3 4
1
U thresh F06855 (fault value = 0)
p3678[0] "Voltage threshold, alpha/beta voltage monitoring fallen below (p3678[0])"
1
F06855 (fault value = 2)
"Voltage threshold value of the phase voltage monitoring fallen below (p3678[0])"
0
I thresh
p3679[1]
T 0
F06855 (fault value = 1)
"Current threshold value exceeded (p3678[1]"
5 6
fp_7991_01_eng.vsd
09.11.18 V05.02.03
p0115[0]
7 8
Function diagram
- 7991 -
SINAMICS S120