. American hydroelectric practice; a compilation of useful data and information on the design, construction and operation of hydroelectric systems, from the penstocks to distribution lines . nt being used onthe bus and a slip-and-shrink joint onthe branch 48 gives datafor copper tubingand lengths of con-tact required. The lightning ar-rester horn gaps are mounted on pipe framework over their respective tanks. All choke coilsand disconnecting switches are suspended from steel bases, being attachedthereto by pin-type petticoat insulators. Potential fuses are disconnect-ing switch t
. American hydroelectric practice; a compilation of useful data and information on the design, construction and operation of hydroelectric systems, from the penstocks to distribution lines . nt being used onthe bus and a slip-and-shrink joint onthe branch 48 gives datafor copper tubingand lengths of con-tact required. The lightning ar-rester horn gaps are mounted on pipe framework over their respective tanks. All choke coilsand disconnecting switches are suspended from steel bases, being attachedthereto by pin-type petticoat insulators. Potential fuses are disconnect-ing switch type. In no case were pin-type insulators inclined from the vertical to supportvertical or sloping runs of conductors. Instead, special supports were con-structed by tying together with steel plates two pin-type insulators asshown in Fig. 170. At right angles to one of the plates connecting the insu-lators was fastened an angle iron. A U-clamp in one end of the bracket thusformed and another in the tie plate hold the conductor at the proper dis-tance from the pole and cross-beam and permit making right-angle bendsin the conductor without depreciating the function of the insulator. The. Fig. 170.—Insulated-Bracket Support for Vertical Conduc-tors that Permits Installing Pin Type Insulators in NaturalPosition 298 HYDROELECTRIC PRACTICE insulators supporting vertical runs are similar but have U-clamps only atthe end of the angle-iron bracket. The 11,000-volt hues lead from their respective switches to a triangle-section pole, indicated as X in Fig. 169 (E-E), and from there extend inthe direction of the transfer track to another triangle-section pole, F,opposite the 33,000-volt switches. From this point on the 33,000-volt and11,000-volt circuits, as well as some 2300-volt feeders, are carried on jointly-used poles. Clearances for Live Elements.—All of the outdoor substation apparatusis mounted so that no Hve parts are within reach of persons standing onthe ground. Furthermore,
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkmcgrawhillb
