The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1895-09-24

wood Power company. Salt Lake clty
IS receiving not a little splendid adj
vertising through the medium of the
press of the United States, and the
world, in fact, for many of the for
eign journals have made mention of
the unique enterprise. One of the
former is the Electrical Engineer,
which. in one of its recent issues, de-
votes four and half pages to the Big
Cottonwood project, giving a concise
and well-written description of not
only the power enterprise, but the
city and territory, with statements Of
the many advantages and resources
which are 10 be found here. The arti-
Gle in question is embellished with
numerous cuts one of which is a.
photograv1re of Engineer Jones, to
whom is given a good deal of deserved
credit for the work he has done in
connection With the designing and
launching of the enterprise.
What the Plant viii Do.
After giving a description Of the To-
cation of the power station. which is
fourteen miles from the distributing
plant of the Salt Lake and ogden Gas
and Electric Light company, the En-
gineer states that the minimum flow
of the Big Cottonwood creek at the
station is 3,400 cubic feet per minute,
and then proceeds with the assertion
that this stream working under $50
feet head, produces 2.447 horse power
any and every hour in the year. Dur
ing nine months of each year it will
give nearly 1000 horse power The
storage reservoir at the head of the
stairs" has an available capacity of
fWenty-four hours continuous flow of
the So cam, making all Of the water
available by using an excess during
maximum loads and allowing the res
ervoir to accumulate during minimum
loads. a capacity Of $500 horse pow
er hours per day of twenty-four hours
is looked for from this source. of which
6S per cent can be delivered in Salt
Lake city in contract form, making
10000 horse power hours net daily. The
6S per cent efficiency is derived from:
PeIton water wheels, so per cent; G.
z. generators, "a per cent; G. E. trans
formers (rafsing) 9735 per cent; line
Transmission, 95 per cent; G.. z. trans
formers (reducing) 971a per cent, or a
total OF 6S1a per cent. The map of the
reservoir shows a pipe line extending
from the head-gates, submerged IN
the bottom of the reservoir. to a PEN
SLOGk VI IGCNlNSI M0Ou housing Win
grizzlies" located Just below the
bridge. This pipe. Of steel-banded red
wood, is anchored 70 the ~attom by
rock piles. and is to be used in the
event of its being necessary to drain
the reservoir, without interfering with
the running of the station. This is ac-
complished by closing the head-gate
valves and opeI.ing the reservoir valves
in the drainage tunnel, and the sta
Nfnf7 will films hA oT he
natural flow of the stream. during
such time as the reservoir might be
empty
Dimensions of stations.
'The outside dimensions of the gem
Grating station are "a feet by 100 feet.
The generating plant consists of four
$50 k. w. three-phase General Electric
generators, separately excited, nom
compounded, set with armatures,
parallel to each other, facing up in
true line in the building as shown in
plan and elevation on page 24S. Each
generator is driven by one heavy
special Pelton wheel. sixty inches in
diameter, provided with two nozzles
three and one-quarter inch diameter.
The straight nozzles are provided with
a gate valve for shutting off and the
lower nozzle is equipped with a hood
regulator so that both good regula-
ton and economical use of water are
secured. Each nozzle at $40 feet eff
fective head, produces 80 mechanical
=. p, and runs at 300 revolutions per
minute, its economical speed The
water wheel is keyed directly on the
armature shaft, in lieu of pulley.
In addition to the generators named.
fOUc 1212 k. ". eXciterS, made up in
two sets, viii be used; both generators
OF each set being connected together
by friction couplings. and each gen.
orator to be driven by a 14-inch Pei
ton wheel with cast housings. Each
set will consist of two generators. and
two wheels viii be built up on a
cast-iron base-plate, making a rigid
ana direct connection. This applica-
ton provides exciting energy in two
units, and at all times either one or
two exciters are in reserve The ex-
citers are to be run in multiple. and
all connected to one common "bus
line on the switchboard. The three
phase generators will also be operated
IN parallel. There will be six raising
transformers 265 k. m. each
That Electric Light Contract.
'sThe poles for the line construction
were selected from live growth of
Sand Point idaho cedar. The small
lest are 40 feet long, and inches in
diameter at the top. They are placed
100 feet apart. The line conductors
consist of y wires, four four circuits
of three wires each; all NO. 2. soft
drawn bare copper, and connected to
the same common 'fbUs line" at the
generating and at the distributing
station. The lire loss, in delivering
1890 kilowatts at 10000 volts. will be
something less than per cent
1.-THE transmission line from general
ing to distributing station is IA miles
by pole line. The distributing station
as owned by che Salt Lake & ogden
Gas and Electric Light company, who
rent it to the Big Cottonwood Power
company at a nominal rent It con-
iains, for 'tstep-down'' transforma-
ton, nine 175 k w air blast trans
formers. from the secondary side of
which the Electric Light company
buys the current wholesale by meter.
This arrangement is a most convenient
one for both companies. The actual
terms Of tfle contract are that the
electric light company is to be sup
piled with all the current it can dis
pose of for electric lighting and
power in units OF 10 h. o., and under,
the Big Cottonwood company reserv-
ing the right to supply power to
motors il units exceeding 10 h. D., and
the right to reach such wholesale users
of power by wires erected on the cleo
trio light company's poles, throughout
o11 ~, -iefc 10 ,;+