ABB Uniswitch Operation And Maintenance Manual page 13

Compartments
ABB
Uniswitc h Operation and
Maintenanc e Manual
The cubicle is divided into the following compartments (for all
compartments, see Figure 3.2):
Figure 3.3
View into the busbar compartment.
1) Busbar compartment (1) (see Figure 3.2)
The busbars (40) have a profile cross-section made of copper and are
laid in sections from cubicle to cubicle. The partition is non-metallic in
accordance with IEC 60298 standards.
The busbar compartment requires tools for opening. It is designated a
"tool-based accessible compartment".
When opening, the user should take measures to ensure
safety (ie. Busbar must be dead).
If the sectionalizing cubicle and bus riser cubicles are included in the
switchboard, the busbar compartment is divided into two different
sections by means of metallic partition.
2) Circuit-breaker & cable compartment (3 & 5) (see also Figure 3.2
and Figure 3.9)
There are interlocks to ensure that live parts inside are dead and
earthed before opening. This compartment is designated an "interlock-
controlled accessible compartment".
•
The common circuit-breaker & cable compartment contains all the
necessary equipment for reciprocal operation of the withdrawable
part and the cubicle.
•
The compartment is constructed for the installation of three current
transformers. Should all three current transformers (45.1) not be
required, dummies will be installed in their place, using the same
installation and connection procedures.
•
The non-metallic shutters (10.5), cover the insertion openings to the
busbar compartment. The shutters are opened by means of shutter
rolls of the withdrawable circuit-breaker part, using a lever when
inserting into the service position, and are closed when the
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UNI S14GB 05-02