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,ii j-fnl *a? oi i tio nx nwoi (iicr To oLla rioae no slliri erW ai elenciuJ on rii^lw •vt-iujs BsIIm ii ei. ;ti £nB ,esls ytijs 'lo frwo;^ d-estiien eAi t.l atâqi on eiB atedi aioêiertT ,owit eri* rrsewitscf esi i elcf.^rosrtoc^. 03*^0 j-nwoJ ovf?i 0* rred-fiê aoi r-eirrerusTCt e eoffJL;«l cfdîm rioiriw artolîiaoo nJoltf-re .eenil ?Jt :.uo yjCtv.Bl mdw aolisiîleaoo Jee^tl'îfe ericf ?JlBwroTT eriT .wole -^ciev ad IIlw, J^.r ;Jj-x.-i* ev9lIs>Q od aoLiSdi vt. vs tX eiecid- , anuiti/^ •A-6't 4 ,9LiiOi:b a ai olgoeq 0'. fliv erf;^ o^nx eioion I jtnlnrf T'VO Llxv ttv.i tr If/^j-îjoo :-:2 dJ sioleioriT .005 Jboioxe ôrr vJJiidotq JTlr .sliTi B tleii tiJrirf eTom rioum JiiQTxuo '>o «oi eimRns'^d lo'l y^^' ^î^so^" ori^^ etf eitt 'io Y.Jiciixoiq edj oi eui ,ê^© jbru; dJ-rton etli 03 wot^ JOjuiso nwoi erl' Lcta ,m:oi idi lo iîiq ttir,divoe sdi ai k.i)iAOoL ei i!iBX.q isv.oq orlT .slllu TiO'f'T elim i-rJ-iiJtJu c. ii.nrid eeel bii; nol Josiii; Bir(J nl ''.itr^.t£ e-r^Cflv erfd' dsntf oe fkTByrAiL'Oi ei Ifiw 0;.*alllv odd- to rf;twx>i^ Liawod yoiiebne;^ IlA ,il bI e-tiod isadS'! 1: odi eio'»?cf notio&ilL afffJ' nt ©Idsiycisnoo wofv} o.'tô ;ti .;trfal(i rirt;f moit eoa&iP.tL Bld&lostqqs n& . eefrrjeuLnx to eoasecfe erLt to siujm ased îjijsailB esx( ooI^neM eno '•.! 3'i6riT .6l
In the 18 typical plants Investigated ten used the 110 volt 2-wire ssrstera, five used the 110/220 volt three wire system and three the straight 220 11, volt system* The predominance of the 110 volt system is probably due to lack of general knowledge ooncaming the 110/220 volt system, it is supprisixig to note the frequency with which this system is given no consideration by village boards or even electrical contractors in the prep- aration of specifications for these small plants. It is the opinion of the writer that the 3-wire system should be invariably recommended for the lighting of village -vtiere d. c. is advisable. The straight 220 volt system has proven to be dangerous when used on lighting circuits and should never be given consideration except for power purposes. The use of the straight 110 volt system results in extra investment in copper which is practically useless . The copper alone in a plant such as that under consideration represents approximately 7fa of the total investment • To substantiate this point, complete calculations ware made as tabulated in Table Nos . Ill and IV. Figure 2 shows the diagram of the three feeder circuits. The first column of Table No. Ill refers to the sections of the feeder circuits corresponding to the lettering on Figure No. 2. ing assumptions. In these calculations it was necessary to make the follow- Average size of lamp used, - 40 Iffatts Maximum load of average block of 12 residences, > 1200 Watts.
Page 2 and 3: Illinois Institute of Technology UN
Page 7 and 8: THE INSTALLATION OF AN ELECTRIC LIC
Page 9 and 10: TABLE OP COITENTS, —oooOooo— Se
Page 11 and 12: oooOnoo ?ig. 1 Plat of the Village
Page 13 and 14: THE mSHALLATIOS OP AN ELECTRIC LIGH
Page 15 and 16: SECTION I, HISTORY. The Village of
Page 17 and 18: SECTIOir II, Size of the Generator,
Page 19 and 20: This estimate is very liberal. The
Page 21 and 22: station capacity. This figure may a
Page 23 and 24: the residence district. Gasoline st
Page 25 and 26: Ihs total estimated load le therefo
Page 27 and 28: sfeLOWs that •ttiis estimate chec
Page 29 and 30: Compensator ; This generator shall
Page 31 and 32: Alternating Current System ; SECTIO
Page 33: tunnels in the hills on each side o
Page 37 and 38: TABLE NO. 3 COPPER CALCULATIONS Len
Page 39 and 40: 125/250 VOLT SYSTEM. peet Of Size o
Page 41 and 42: In addition to Its advaatages from
Page 43 and 44: SECTIOS IV* The Storage Battery. 15
Page 45 and 46: 16. longer psrlod of time each day
Page 47 and 48: to accomodate four additional plate
Page 49 and 50: apparatus is special and therefore
Page 51 and 52: SBCTION T. The Switchboard. In the
Page 53 and 54: 20. Is required. For intelligent op
Page 55 and 56: panel contains all the apparatus sr
Page 57 and 58: I!FEM #2 ; Egxtlpnent 1 - DJ. Type
Page 59 and 60: ITEM #4; 2 - D»PJ).T. 250 V. 60 am
Page 61 and 62: Poles ; SECTION VI. The Line Constm
Page 63 and 64: are 3 feet long, four-pin arms 4 fe
Page 65 and 66: The lamp can be lowered by means of
Page 67 and 68: 400 - 3/8" X 4" galT. carriage bolt
Page 69 and 70: eluding the cost of erection, SECTI
Page 72 and 73: .II? .JGITO;;;;:. -xo iaelq b:
Page 77: O JiOO Too -^
Page 85 and 86:
ELECTRIC SERVICE SUPPLIES COMPANY I
Page 87:
ELECTRIC SERVICE U P P L I E S COMP
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