Busbar Compartment; Main Busbars - ABB MNS R System Manual

Busbar compartment

The busbar compartment is located
in the middle section of the
switchgear. Main busbars can be lo-
cated at the top, in the centre or at
the bottom of the panel depending on
the selected design and they distrib-
ute the power to the various
switchgear panels. In some of the ex-
isting configurations main busbars
can be directly connected to a circuit-
breaker as well. Distribution busbars
are located into the single column and
positioned vertically to feed panel cir-
cuit-breakers. The busbar system can
be composed by 1, 2 or 3 busbars
per phase, according to requested
rated current, short-circuit level and
operational ambient conditions in
terms of temperature, altitude and
humidity. Busbars are normally bare
copper made, on request can be suit-
ably treated with tinning, silver-plating
and/or sheathing.

Main busbars

MNS R main busbars are available for
currents up to 6300 A. Main busbars,
as well as distribution busbars, can be
completely segregated. Each MNS R
panel can be fitted with three busbar
systems at the same time (top-cen-
tre-bottom) each segregated from the
others.
ABB SACE
Main busbar system with connections for incoming busbars and bus-tie from the top
Detail of a compartment with entry from the top and connection on the main busbar system
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