The Morris County chronicle. [volume] (Morristown, N.J.) 1877-1915, 1907-06-18

in the center of the engine A third
generator of 100 K. W., to be known
as No. 5, is set up ready to be belted
to the outside or governor pulley of
| the same engine.
The Arlington & Sims engine,
ed to drive a 800 K. w Stanley unit;
| 2phase, so cycle, 2200 volts.
On account of the fact that single
phase machines are difficult of sue
found necessary to divide the light
| ing business of the City into at least
! as many circuits as there are genera
tors.
There are at present four separate
| feeder circuits running out from the
switchboard, and as no two machines
can be run on the same circuit, care
full attention is necessary that no one
circuit shall demand more than the
capacity of the largest station unit.
At the time of our observation, which
was at $50 p. m. on the Saturday
night peak load, there was a total of
This was being supplied by No. gen
orator at about one-third of it's ca
pacity. On No. 2 circuit there was a
| total load of 6S amperes. This was
supplied by No. 2 generator at about
| one-h half of it capacity. On No. 8
circuit there was a total load of 119
amperes. This was supplied by No. 8
generator at about full capacity. On
No. circuit there was a total load
of 90 amperes, or about three-quar-
tiers OF It's capacity. No z generator
total load of both No. and No. 2
circuits and ordinarily these circuits
might have been both thrown on No.
2. Owing, however, to the fact that
same engine with no way of stopping
one without also stopping the other,
there would have been little gained
by doing this, as No. l would then
n
At nine o'clock, however, the excit-
er belt ran off the pulley, and put all
the stores and residences which We're
connected on that circuit in total
at once switched this circuit on with
No. circuit on No. 4 generator, Civ
ing it 1913 amperes, or nearly full
load. 1t was then necessary to run
No. l generator idle until the load on
the circuits had fallen off sufficiently
to allow No. circuit to be switched
done, the engine driving No. ! and
No. 2 might shut down for the night.
The manner of betting and con-
Meeting is the principal weakness of
ty of service. The generators are
supplied with field current from small
belted exciters, which are all, with
one exception, of obsolete type. Their
number increases the liability of petty
troubles, whereas. one large independ-
entity driven EXETER with field rheos-
tats for generators, would reduce
troubles on this score to minimum
Again, in the case of the generators
and engines themselves, No. 1 and No.
2 generators are belted each to fly
wheel of the smaller engine. If acct
dent should necessitate the shutting
down of one of these generators, the
other must be shut down also. SINH
lar conditions exist with regard to
both driven from one band wheel. 1t
is now proposed to add still another
unit No. 5, to this larger engine,
which will have three units of 420 K.
w. combined capacity belted from it.
The engine cannot possibly. carry
these all at full load without distress
and heating, and any accident to this
engine would practically shut down
the plant. as far as adequate service
is concerned.
One peculiar feature of the installa-
ton, from an engineering standpoint,
is the fact that on account of the inn
practicability of running these small
single phase machines In parallel, j..
e., together on the same bus bars and
feeders, very large Investment in
switchboard and controlling appara-
us was considered necessary, where
as, little if any more investment would
have provided 3-phase belted genera
tors, and a switchboard better and
simpler in all respects. For example,
the switchboard, counting labor of
erecting, ETC., must stand the Compa-
ny between seven and eight thousand
monocyclic generators, with com
bined capacity of $40 K. w. One new
3-phase generator of $50 X. W., for
the small engine, would cost $4,000,
and one of 300 X w, for the large
engine, $3,600 The four monocyclic
generators could have been sold Sec
ond hand and would have realized $2,-
900, making an investment for the
$50 X. w, 3-phase, of $4,000, or, in
GLIDING incidentals, $4,000. A suitable
switchboard could have been built for
$4,000 at an outside figure. This ar
rangement would have supplied an
up to- date three phase lighting and
power system, with switchboard, at
switchboard alone
SUMMARY.
1t may be fairly said that Norris
town has outgrown the present equip
ment There comes time ir the his
tory of every electric plant in grow :
ing town. when it becomes necessary
to practically scrap all the apparatus
included in the original installation
and put in modern equipment of
greater economy and capacity That
time has apparently arrived in this
case. Our observation and inquiries
part of the year to ran all the boil
ers at present installed, with litt1e
| il any reserve capacity. More or less
| interruption of service is bound to
| occur under this condition, with no
surplus power for expansion of bust
ness. The fact that the present boil
ers have seen some ten or twelve
| years. hard service tends to increase
| the liability of accident.