Siemens SIVACON 8PS Configuration Manual page 24

Product description
3.5 System sizes and structure
Structure of the busbars
The bars in the LX busbar system are usually tinned and enclosed in a sleeve made of
highly resistant insulating material. The LXA system features aluminium conductors and the
LXC system copper conductors. In addition to tinning, aluminium bars are also coated with a
layer of nickel.
Mounting positions and rated current
The sandwich design means that the current carrying capacity of the LX busbar system is
not affected by the mounting position. This guarantees high flexibility for positioning the
busbar runs. Current derating is not normally required for busbars in edgewise and flat
positions on horizontal busbar runs or on rising main busbars (vertical busbar runs).
Deviations for the horizontal flat mounting position are listed in the technical data of the
relevant system sizes.
Horizontal busbar run,
edgewise busbars
22
①
Aluminium bar (LXA), copper bar (LXC)
② Layer of nickel, layer of tin (LXA), layer of tin (LXC)
③ Insulating material sleeve with high heat resistance
Horizontal busbar run, flat
busbars
Configuration Manual, 10/2011, A5E02194899-02
Vertical busbar run
SIVACON 8PS - Configuring with LX system