Siemens SENTRON - Page 187

Technical specifications
11.2 Technical specifications 3KC4 and 3KC8 from 1250 A to 3200 A
Manual, 08/2017, L1V30368969104A-02
187
3KC4.52
3KC8.52
3KC4.54
3KC8.54
3KC4.56
3KC8.56
3KC4.58
3KC8.58
3KC4.60
3KC8.60
Short-circuit behavior
Short-circuit current ratings in compliance with IEC 60947-6-1
• Short-time withstand current
(
I
cw
, 60 ms, 415 V)
kA 25 32 50 50 50
• Short-circuit current making
capacity
(
I
cm
, 415 V)
kA 52.5 67.2 105 105 105
Short-circuit current ratings in compliance with IEC 60947-3
• Short-time withstand current
(
I
cw
, 60 ms, 415 V)
kA 35 50 50 50 50
• Short-circuit current making
capacity
(
I
cm
, 415 V)
kA 73.5 105 105 105 105
Conditional short-circuit current with fuse
• Continuous current of upstream
fuse
A 1250 2 x 800 -- -- --
• Conditional short-circuit current
with fuse (690 V) IEC 60947-3
kA 100 100 -- -- --
• Conditional short-circuit current
with fuse (415 V) IEC 60947-6-1
kA 100 100 -- -- --
• Let-through current of gG fuse at
415 V; max. permissible
kA 100 100 -- -- --
• I
2
t value of the gG fuse at
400/500 V; max. permissible
kA
2
s -- -- -- -- --
Transfer switching properties
Switching time I-0 & II-0 RTSE /
ATSE
s 1.4 1.4 1.6 1.6 1.6
Switch-off time I-0-II & II-0-I
IEC 60947-6-1
s 1.4 1.5 1.2 1.2 1.2
Transfer time I-0-II & II-0-I
IEC 60947-6-1
s 2.8 2.9 2.8 2.8 2.8
Transfer time I-0-II & II-0-I
IEC 60947-6-1 with source monitor-
ing
s 3.1 3.3 2.8 2.8 2.8
Motor operator rated apparent pow-
er at 230 V AC
VA 184 230 322 322 322
Motor operator peak inrush current
at 230 V AC
A 2 2 3.5 3.5 3.5