Withdrawable Isolation unit
The isolation unit is mounted on a cradle with integral
racking mechanism and is used to provide isolation gap
between the busbars and the cable.
Refer to separate Operations and Maintenance Manual
for the Withdrawable Isolation unit
Withdrawable Earthing unit
Earthing truck assembly is mounted on a withdrawable
cradle, with integral racking mechanism used to earth the
busbar or cable depending on the configuration.
Refer to separate Operations and Maintenance Manual
for the Withdrawable Earthing unit
2.1.10 Interlocks
Power Xpert
®
UX switchgear is equipped with interlocks
to prevent undesirable switching operations. For further
information, please see par. 4.3.2.
2.2 Panel types
All Power Xpert
®
UX switchgear is constructed in
modular fashion with a series of panels with different
functions. Each panel is made up of 4 compartments.
Below is a summary of the types of panels fitted as
standard in Power Xpert
®
switchgear. It is possible that
they are not all included in any particular installation; it is
also possible that an installation contains one or more
custom panels.
2.2.1 Circuit-breaker panel
A circuit-breaker panel is a cable panel fitted with a
switch, to provide short-circuit-proof power switching.
1. Arc channel
2. Low voltage wire way
3. Busbar
4. Branch busbar
5. Automatic shutter
6. Fixed Contact Spout
7. Withdrawable circuit-breaker
8. Current transformer
9. Earthing switch
10. Cable connection point
11. Earthing switch operating shaft
12. Earthing busbar
To Next Page
Loading...
