26
Technical guide VUC
|
1ZSC000562-AAX en, Rev. 1
Short-circuit current strength
The short circuit current strength is verified with three applications of 3 seconds duration
2)
, without moving the contacts
between the three applications. Each application has an initial value of at least 2.5 times the rms value.
Diverter switch
Tap selector
Max rated through-current,
A rms
Type of connection
3 s duration, kA
rms
Peak value, kA
VUCG
C
450, 600
N,B,E,T
6
1)
15
C
700, 800
E,T
12
30
III
450, 600, 700, 800
N,B,E,T
9
23
F
450, 600, 700, 800
N,B,E,T
9
23
VUCL
III
700, 1000
N,B,E,T
12
30
III
1300
E,T
16
40
F
700, 1000, 1300
N,B,E,T
16
40
Table 12.
1) In case of VUC..E,T higher values are possible on request.
2) For times longer than 3 s, contact ABB for advice.
VUCL with tap selector F
All values given as 1.2/50 µs impulse withstand voltage (kV) – power frequency withstand voltage (kV).
Type of
regulation
No. of
positions
Within one phase
Between phases for neutral
point
a1
a2
c1
f1
f2
e1
b2
b1
d1
L
-18
300-125
550-180
-
-
-
100-20
100-20
600-180
-
R
-35
300-125
550-180
-
-
-
100-20
100-20
600-180
-
D
-35
300-125
550-180
600-200
620-200
650-200
100-20
100-20
600-180
600-200
Table 11.
