816 INDEX 



PAGE 



Seepage 164 



canals 110 



Shipping limitations . 193 



Short-circuit currents 458 



calculation of three-phase 46G, 468 



calculation of single-phase 480 



mechanical stresses 471 



synchronous generators 292 



Short-circuit suppressors 620 



Signal systems 583 



Skin effect 569 



Slope, hydraulic 106, 117, 119 



Spacing of conductors 627 



Specific speed of tjurbines 206, 209 



Speed, exciters 353 



generators , 315 



turbines 214 



Speed regulation 122, 246 



turbines . 220 



Spillways 83 



Stand pipes. See Surge tanks 141 



Starting up of station 198 



Station wiring. See Wiring 625 



Steam auxiliary stations 692 



base-load stations 697 



cost 745 



low-water stations 695 



peak-load stations 697 



prime movers 693 



stand-by stations '. 694 



Steam power, cost 745 



relation to water and gas power 27 



Steel pipe 125 



Storage batteries, excitation 361 



oil circuit breaker 589 



Storage reservoirs 59, 159 



intakes 163 



limitations 160 



location 160 



prevention of floods 22 



regulating effect 59 



seepage and evaporation 1 64 



storage and pondage 159 



Storage of water 650, 685 



Stream flow 53 



definition of terms 53 



duration curves . . 676 



