The times., 1897-12-26

opera ting the direct-connected low-ten
sion generatots, either one oil which beine
capable of carrying the entire load rue
arc ma chimes may be thrown In or OUT
of service as required by means OF the
hating by steel clutches five feet in
| diameter. This arrangement economically
provides FOR tie operating OF both ehe
three-wire low-tension and the arc light
ing systems from one engine during 'he
period of light load The shaftins was
| installed by the Hill Clutch Company,
4 Cleveland, Ohio.
'Eesides the Brush machines, there WI
be helted to the line shafting two Gen ,ral
| Electric Company's alternating dyaamps,
1 one A-7O, ,040-volt, l25-cycle, and one
| A-30, I.o46-volt, 125-cycle. Another
| alternating machine is to he run by motor
Spanning the engine e-room is an electric
crane OF twenty five tons lifting capacity
| with a seventy -twofoot span, capable or
| lifting its load and depositing it in any
portion of the room in few moments.
'In order to cut off the high peak and
more nearly equalize the twenty four hours
load principally, and incidentally to help
| out the pfesent plant during the remedel
| ing, the company has purchased and in
stalled a large storage battery from the
| Electric Storage Battery Company, of
| Philadelphia, Pa. This battery comprises
| 15o cells, and has a capacity of 1000
| amperes on a side for three hours, and is
| SO arranged as to be connected with
| either or all feeders or the main bus, and
1 thus can always be used to the best ad
vantage. The battery is discharged at from
| $50 to 135 volts. 1t is charged at the
| period OF the lightest load: that is, from l
q. m.. to a. In., and from a. m, to .
| p. m, and at very low pressure. Atcertain
periods il will be able, if necessary, to
run the entire plant, and will easily carry
any unexpected demand, such as darkness,
| due to = sudden storm, or an accident To
| any portion Of the machinery. The bat
| tery is located in large building I'M
| mediately adjoining its present station.
| Installed at the Fourteenth street end,
| and extending the full width Of the engine
| room will be the switchboards operating
| the entire service of tie company, co IL
prising the low tension tbree-wire system,
arc and alternating systems and the storage
| battery. The boards are made OF blue
Rutland CVt.) marble, highly finished and
| containing the latest and finest instrn-
ments and appliances known to the cleo
| trcal art.
The low-tensiun board which is being
made by the General Incandesc Arc
Light Comi,any, of New York, is com
| posed of eight cen panels, five panels At
| the left erd to form the generator boaTi,
eleven panels at the right end, the feeder
| board, end two panels between the gen
orator and feeder panels, the pressure
board, II is to be provided with Two sets
| of busbars which can be run at different
presseres Or each of the three gen
| orator panels, controlling six 24o-kilowatt,
| 160-volt generators, are to be mounted
| two 2,o0o-ampere ammeters, three 1000
| ampere switches, two balance indicators
! and two galvanometer switches. On the
| generator panel, 10 control two 4So-kilo-
watt. 160-volt generators, are two 1000
| ampere amnietrrs, three 4 4,oo0-ampere
switches, two balance indicators and two
| pilot lamps, ard the last generator panel
is to he left blank for additional 4So-
kilowatt generators TO be installed in the
| future.
.'of tie feeder panels are to control
l6 SOC, 900 circular mil feeders, and on
each are mounted four 50o-ampere ann
meters. four 5o0-ampere switches, and
two 250-ampeTe switches on the neutrals.
One feeder panelis to ocontroltwo 900 900
circular mil feeders, and ON it are mounted
| four / ,00o-ampere ammeters and two
600 -ampere switches on neutrals. Two
| feeder panels are left blank for two addi-
| tional .0G0, ,O0o o-circular- feeders each.
''On the pressure panel next to the
generator board, are Two volunteers 70.
pressure regulation, four 24-point volt
meter sv itches, one 8 S,0O0-ampere Thomson
| recording wattmeter and one $500 aInrera
Thomson recording wattmeter. On the
| pressure panel next to the feeder boarl
are two 24-port voltmeter switches, one
2.000-amreTe neutral amIneter, one 5000
ampeTe Thomson recording wattmeter, and
| one 5, 5,500-anpcre Thomson recording watt
| meter. Switches for volunteers are wired
so that they can be connected with the
pressure wires of any feeder or to eithar
buS-har. The instruments used are from
the Weston Electrical Instrument Com
pany, with .heeXception of the wattmeters.
1.-The alternating switc hboards, construct
ed by tho GeicTal Electric Company, consists
of sever panels-three for the genera .or
and fol for the feeder board. Two panels
control two 6o-kilowatt, .040 volt, 1875
cycle alternating-c generators and
eXciteTs, andon each are mount ed two fuse
blocks one ammeter, one 150-y1lt volt
meter, one ground ietector, one ground de
teotor lamp, one ground detector switch,
one douMe-throw, direct-potential
generator switch, one double-pole
switch for EXETER and one Thomson Ie-
cortiing VI attueter. T wo feeder pa nels IN
troll four feeders, and on each are mounted
four 5o-ampcre fuse blocks, two 50-amp..re,
dauhle-polc, direct potential switch IS, and
on the hack of these panels re four 300
volt station lightning arresters. Two
feeder panels are left blank. Carpenter
rheostats are used on all Of the boards ex-
centing the arc, and are placed i'm the ear
under the floor being controlled by gear
ing with hand wheels on Spindles.
THE arc switchboard is composed OF
eleven panels, and is divided into three
sect ions of three panels each, and be-
tween the sections are two smaller panels
which are used in transferring the machines
of one section to another. 7 he board is
made fci sixteen Brush arc ma chimes, but
at present only thirty-two circuits will De
used from eight arc machines, four circuits
to each dynamo
''In addition to the Switchboards men
toned, there is to be placed alongside
of them the storage battery swift chboa rd.
This is to be made of the same ma .srrial
as the Others and is composed of practically
but one horizontal panel, but this is
divided into two parts. On this are
moutneo instruments to control for wenty-
point ceil-regulatin switches, two on
each SIDE of the system, each capable of
carrying 1000 amperes. These switches
are located i'll the storage battery room
and are provided with motors and ndi-
Gators to enable them to be operate from