Pacific service magazine . , namely, theautomatic type. Substation E will betaken for purpose of illustration. This sub-station operates without the necessity ofthe presence of a single human everything that an operator usedto do manually in a substation is now ac-complished by an operator at a distant sta-tion, in this case Station L, Oakland, bymeans of electrical impulses carried over thefour control wires which connect the twostations. Station E, technically speaking,is operated by a combination of full auto-matic and supervisory control apparatus,thus combining two of
Pacific service magazine . , namely, theautomatic type. Substation E will betaken for purpose of illustration. This sub-station operates without the necessity ofthe presence of a single human everything that an operator usedto do manually in a substation is now ac-complished by an operator at a distant sta-tion, in this case Station L, Oakland, bymeans of electrical impulses carried over thefour control wires which connect the twostations. Station E, technically speaking,is operated by a combination of full auto-matic and supervisory control apparatus,thus combining two of the most moderndevelopments in electrical substation designat the same plant. Both types of equipmentoperate without attendants, the supervisoryequipment operating, as the name wouldindicate, under the supervision of an opera-tor at the distant station, while the fullautomatic equipment operates without evenbeing supervised from any point. The load carried by Station E is of twokinds, alternating current which is supplied. Station E, Piedmont, a truly representative modernelectric substation. 384 Pacific Service Magazine to residential territory andstreet lighting for generalstreet illumination, anddirect current power forthe use of the Key SystemTransit Company. All ofour high-voltage transmis-sion lines carry alternatingcurrent, and it is necessaryonly to reduce the voltageto make it suitable to oper-ate electric lights, toasters,and washing motors which drivethe Key Route interurbantrains, however, are notdesigned to operate on alternating current,so it is necessary to change the power fromalternating to direct current before it canbe used by them. This is done at StationE, Piedmont, by means of two motor-generator sets, each of which is essentiallya large alternating current, synchronousmotor, which is coupled to and drives alarge generator which produces direct cur-rent. Thus, the current goes in as alternat-ing and comes out as direct current of avoltage sui
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Keywords: ., bookcentury1900, bookdecade1910, bookidpacificservi, bookyear1912
