Connecting; Cables And Busbars - Siemens SENTRON 3VL160X System Manual

Connecting

7.1

Cables and busbars

The 3VL molded case circuit breaker can be connected using cables, flexible copper bars or
busbars.
Thermal and electrodynamic stresses affect these conductors in the event of a short-circuit.
To avoid dangerous effects, it is necessary to asses them correctly and to take appropriate
measures to suppress them.
The diagrams and tables below show the recommended maximum clearance between the
molded case circuit breaker and the first point.
Overview of cable and busbar mounting methods
Cable mounting
Table 7- 1
A cable mm
B cable mm
C bar mm
This table applies for all switching capacities.
3VL IEC molded case circuit breakers
System Manual, 11/2013, 110 0110 - 02 DS 03
Recommended cable mounting clearances
VL160X VL160
100 100
400 400
Busbar mounting
VL250 VL400 VL630
130 150
400 400
250
7
VL800 VL1250 VL1600
300
600
89