Main Busbar, Horizontal - Siemens Sivacon S8 Planning Information

2.3

Main busbar, horizontal

Tab. 2/7 lists the rating data for the two possibilities how to
position the main busbar – top or rear – (Fig. 2/4). Chapter
10 describes how ambient temperatures must be observed
in respect of the current carrying capacity.
Fig. 2/4: Variable busbar position for SIVACON S8
16 SIVACON S8 Planning Principles – SIVACON S8 – System overview
Tab. 2/7: Rating of the main busbar
Top busbar position
Rated current I at 35 °C ambient
n
temperature
Ventilated Non-ventilated
1,190 A 965 A
1,630 A 1,310 A
1,920 A 1,480 A
2,470 A 1,870 A
3,010 A 2,250 A
3,270 A 2,450 A
1)
3,700 A 3,000 A
1)
4,660 A 3,680 A
1)
5,620 A 4,360 A
1)
6,300 A 4,980 A
1)
If circuit-breakers with a very high power loss are used, the
following correction factors must be applied:
3WL1350: 0.95
3WL1363: 0.88
1)
Rear busbar position
Rated current I at 35 °C ambient
n
temperature
Ventilated Non-ventilated
1,280 A 1,160 A
1,630 A 1,400 A
2,200 A 1,800 A
2,520 A 2,010 A
2,830 A 2,210 A
3,170 A 2,490 A
4,000 A 3,160 A
2)
4,910 A 3,730 A
2)
5,340 A 4,080 A
2)
5,780 A 4,440 A
2)
7,010 A 5,440 A
1)
When operating two systems per cubicle at the same time
(busbar position rear top and rear bottom),
a reduction factor has to be considered::
for ventilated boards:
for unventilated boards:
2) Busbar position rear top or rear bottom
Rated short-time
withstand current
I (1 s)
cw
35 kA
50 kA
65 kA
85 kA
100 kA
100 kA
1)
100 kA
1)
100 kA
1)
150 kA
1)
150 kA
Rated short-time
withstand current
I
(1 s)
cw
50 kA
65 kA
65 kA
85 kA
100 kA
100 kA
100 kA
2)
100 kA
2)
100 kA
2)
100 kA
2)
150 kA
0,94
0,98