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SIVACON S8 Planning Principles – Circuit-breaker design
3.3 Cubicles with one MCCB (3VL)
The widths for the different cubicle types are listed by
MCCB type in Tab. 3/10. Information about cable connec-
tion and rated currents for the different configurations of
Cubicle widths for
3VL5763 (630 A), 3VL6780 (800 A), 3VL7712 (1,250 A), 3VL8716 (1,600 A)
Top busbar position Rear top busbar position Rear bottom busbar position
Cable entry from the top or bottom
Cable entry from the
top
Cable entry from the
bottom
Cable entry from the
top
Cable entry from the
bottom
The position of the connecting bars is identical
for cable entry from the top or bottom
Two main busbar systems in the cubicle are also possible
3-pole: cubicle width 400 mm 3-pole: cubicle width 400 mm
4-pole: cubicle width 400 mm 4-pole: cubicle width 600 mm
MCCB, busbar position, cable entry and ventilation condi-
tions is given in Tab. 3/11 and Tab. 3/12.
Tab. 3/10: Widths for incoming/outgoing feeder cubicles with MCCB
Tab. 3/11: Cable connection for cubicles with MCCB of type 3VL
MCCB type
Nominal
device
current
Rated current at 35 °C ambient temperature
Top busbar position Rear busbar position
Cable connection Cable entry from the bottom Cable entry from the top
Non-ventilated Ventilated Non-ventilated Ventilated Non-ventilated Ventilated
3VL5763 630 A
540 A 570 A 515 A 570 A 475 A 520 A
3VL6780 800 A
685 A 720 A 655 A 720 A 605 A 660 A
3VL7712 1,250 A
890 A 1,100 A 890 A 1,100 A 775 A 980 A
3VL8716 1,600 A
900 A 1,100 A 1,050 A 1,200 A 915 A 1,070 A
Tab. 3/12: Rated currents for cubicles with 3VL
Cable lug DIN 46235
(240 mm
2
, M12)
1)
Max. number of cables connectible
per phase dependent on rated current
Up to 800 A
From 1,250
to 1,600 A
4 6
1)
It is possible to use 300 mm
2
cable lugs with an M12 screw (cable
lug is not in compliance with DIN 46235, although it is available
from some manufacturers)
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