The herald and news. [volume] (Newberry S.C.) 1903-1937, 1913-08-29

large blocks of granite being mixed
in with the concrete. The dam is
built to withstand five times the nor
NAL pressure. Integral with tne dam
itself are tle cIuice-gates, forebay
racks and fumes. The upstream face
is perpendicular. The downstream
face has the outline, in section, of
an ogee moulding, that is, with a
combination of concave and convex
surface, curving from crest to base
along the spillWay, so that the water
may flow over more easily and with
the least washing at the foot. 1nte-
grail with the dam also will be the
power house at the eastern end, par
allel with the DAM This power house
is to be of brick and steel. 1t will
be approximately 24O feet long, 80
feet wide and in height about 40 fees
above the level of the crest. In this
building provision will be made for
the ultimate installation Of eight
electrical generators of 3,1OO K. V. A.
capacity each, which will develop 25,-
600 horsepower of electrical power.
These generators are of the umbrella
type, and will be directly connected
to vertical Waterwheels or turbines.
Each turbine will receive its water
through individual forebays and
fumes, the gates of which will be op-
Grated electrically, so that water may
be fed to or shut off from any unit
without affecting the operation Of
other parts of the plant. In the build
ing will be placed also all necessary
sWitchboards, transforming devices,
exciters, and other appurtenances in
cidental to the transmission of cleo
trical power. There will be nine wat
ercooled transformers Of 1900 K. V.
A. capacity each.
The immediate installation, on COM
pletion OF the power house, will be
five units, or generators, capable Of
developing approximately $4,000
horsepower of electrical power under
a 35-foot head, leaving three units to
be installed later on, Wien the de-
mand for power shall warrant the
installation.
The electrical energy will be de-
veloped by the generators at 2,300
volts. This current will then be
transformed to a voltage of $4,000
volts, at which pressure it is to, be
delivered to the transmission line for
its journey to Columbia.
The high tension transmission line
will be run in two circuits of three
wires, strung on steel towers and
will be between 26 and % miles long.
It is estimated, at the high pressure
used IN transmitting the current that
the line loss will be not more than
4 per cent. when both circuits are
operated at the same time, and about
8 per cent. wnen only one is operat-
ed.
At Columbia a terminal transfor-
sner station has been constructed, in
dimensions. about "a by At feet, in
which will be installed large $500 K.
V. A. reducing transformers, with the
necessary high tension oil swithchlng
devices, lighting arresters and
switchboard apparatus, giving tull
control over the current.
The electrical current from the
power house at Parr Shoals will be
delivered to the transformer station
il Columbia at pressure of $4,000
volts. When it reaches Columbia this
high pressure current will be passed
through the reducing transformers,
by means of which it will be reduced
to a pressure of 1850 volts for dis
tribution to large power consumers,
cotton mills, etc., and to- $500 volts
for distribution to small consumers
and for lighting purposes.
The substation at Columbia will be
equipped with II circuits for lighting
and small power consumers and with
seven circuits for the large consum-
ers. Provisions will also be made for
line from this station to Cayce, as
we'll as for lines to the State institu-
tions near Columbia.
W. 1FoLo - S&o%ouiEo