ABB VUCG.N - Short-Circuit Current Strength; VUCL with Tap Selector F

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.