3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
97
Connecting
8
8.1 Cables and busbars
SENTRON VL molded-case circuit breakers can be connected using cables, flexible copper
bars or busbars. Either copper or aluminum can be used.
Thermal and electrodynamic loads affect these conductors if a short-circuit occurs. To avoid
dangerous effects, it is necessary to size them properly and to ground them correctly.
The diagrams and tables below show the recommendeded maximum clearance between the
circuit breaker and the first support.
Overview of cable and busbar mounting methods
$
%
Cable mounting
&
Busbar mounting
Table 8- 1 Recommended cable mounting clearances
Support
dimensions
VL160X VL160 VL250 VL400 VL630 VL800 VL1250 VL1600
A cable mm 100 100 130 150 300
B cable mm 400 400 400 400 600
C bar mm 250
This table applies for all switching capacities
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