Issue 14.2
Continued from page 1
The design of the panel consisted
of multiple step configurations
with 12 output steps, which were
either 50KVAr or 75KVAr
automatically switching steps. It is
controlled by an intelligent
automatic reactive controller,
which is responsible for switching
the capacitors in and out as
required for control or protective
functions.
Saftronics always aims to ensure
that we work with our clients to
ensure that we offer not only the
best possible solutions for the
application but also the most cost
effective solutions. We therefore
used an existing silo shoot that
was filled up as a transformer
Plinth, and specially built cable
bridge was designed to be 4,8m
high, and 12 meters long to
ensure that trucks can still pass
under the bridge, without
disrupting the power cabling
from the Transformer to the
Plant.
Zone 21/22 lighting installed in mill.
Saftronics also did the new
light installation for the newly
refurbished area of the plant.
The lighting in the mill is all
rated for Zone 21/22 as the
area that the lights are
installed is a very dusty
environment. As seen in the
pictures the lights are all fitted
in suspended cable trays. The
total kilometres of cable laid
down for this section of the
project was 3.5Km.
The Power Factor Correction
section of the project was very
essential, as the power factor
load at maximum demand was
registering at 0.65 lagging.
Cable Bridge built over road to
carry cables
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A power factor correction
panel rated for 850KVAr was
installed. The panel consisted
of oil filled capacitors and
detuning reactors to protect
the capacitors against harmful
harmonic currents.
Subsequent to the installation our
client is enjoying a lower
maximum demand charge due to a
system that is now running at an
acceptable power factor. The
financial savings gained from this
installation means that the
payback period on this project is
only 12 months.
Transformer fitted onto improvised
Plinth on site
Power Factor Installation