Cranes or hoists having adequate
lifting capacities should be available for handling material during
installation. Nylon web slings provide an ideal means for lifting
equipment without damaging it.
Gas is handled through commercially
available gas-processing trailers that contain vacuum pumping
equipment, gas storage tanks, compressors, filters, and dryers. The
size of the individual gas compartments and the evacuating and
storage capacity of the gas-handling equipment is especially
important in large stations.
Suitable evacuating equipment and a
heat source to counteract the chilling effect of the expanding gas
may permit filling directly from gas cylinders or gas-handling
equipment. High-voltage test equipment is required for checking the
quality of the insulation after installation.
Adapters for high voltage testing may
be required. These include a suitable entrance bushing for connecting
the high voltage to the gas insulated conductor and a termination for
closing off the end of the equipment when the entire assembly has not
been completed. In many cases, it may be possible to use an entrance
bushing that is a part of the installation.
When tools and alignment templates not
readily available on the open market are required for installation
and maintenance of the equipment, one set should be furnished, by the
supplier, with the equipment when it is delivered.
The following materials should be on
hand before the bus is opened:
a) Gas-processing equipment with
adequate storage capacity
b) Electrolytic or electronic
hygrometer or comparable equipment for measuring moisture levels
c) Insulating gas leak detector (Where
double “O” rings are used, a manometer can sometimes be connected
at the sensing hole to measure any increase in pressure between the
“O” rings. Commercial high-viscosity, noncorrosive solutions may
be used to locate larger leaks at a sensing hole, at welds, or at
bolted flanges.)
d) Dry air
e) Clean plastic gloves and work
uniforms
f) Lint-free cloths and
manufacturer-recommended solvents
g) Temporary plastic bags or covers for
sealing openings after components have been removed
h) Commercial-type vacuum cleaner with
high efficiency particulate air (HEPA) filters and nonmetallic
accessories
i) Tools supplied and recommended by
the manufacturer
j) Ventilating equipment
k) Handling and lifting equipment
l) Maintenance manual and erection
drawings
m) Ladders and platforms as required
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