Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. . IN Inches Self-in-ductanceL Henrys SizeB. &S. Diameter IN Inches Distance IN Inches Self-in- DUCT.\NCE L Henrys 0000 .46 12 .00234 4 .204 12 .00280 18 .00256 18 .00300 24 .00270 24 .00315 48 .00312 48 .00358 000 .41 12 .00241 5 .182 12 .00286 18 .00262 18 .00307 24 .00277 24 .00323 48 .00
Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. . IN Inches Self-in-ductanceL Henrys SizeB. &S. Diameter IN Inches Distance IN Inches Self-in- DUCT.\NCE L Henrys 0000 .46 12 .00234 4 .204 12 .00280 18 .00256 18 .00300 24 .00270 24 .00315 48 .00312 48 .00358 000 .41 12 .00241 5 .182 12 .00286 18 .00262 18 .00307 24 .00277 24 .00323 48 .00318 48 .00356 00 .365 12 .00248 6 .162 12 .00291 18 .00269 18 .00313 24 .00285 24 .00329 48 .00330 48 .00369 0 .325 12 .00254 7 .144 12 .00298 18 .00276 18 .00310 24 .00293 24 .00336 48 .00331 48 .00377 1 .289 12 .00260 8 .128 12 .00303 18 .00281 18 .00325 24 .00308 24 .00341 4S .00338 48 .00384 2 .258 12 .00267 9 .114 12 .00310 18 .00288 18 .00332 24 .00304 24 .00348 48 .00314 48 .00389 3 .229 12 .00274 10 .102 12 .00318 18 .00294 18 .00340 24 .00310 24 .00355 48 .00351 48 .00396 In Tables VI and VII a mile of circuit refers to one mile of pole line. For a single-phase line the inductance of a loop for a mile ofline or circuit, two miles of wire, the formula is L= .000644 [ log ^^ + .25] 42. HIGH TENSION TRANSMISSION LINE CROSSING THE KENNEBEC RIVER NEAR AUGUSTA, MAINE Courtesy of Archbold-Brady Company POWER TRANSMISSION 33 Where we use the inductance of one wire we haveL= .000322 [ log ^^ + .25] Table VII is based on the above formula for a three-phaseline. Self-inductance is reduced by decreasing the distance betweenwires and it disappears entirely in concentric conductors. Sub-dividing the conductors decreases the drop in voltage due to self-inductance but it complicates the wiring. Circuits formed of con-ductors twisted together have very little inductance. When alter-nating-current wires are run in iron pipes, both wires of the circuitmust be run in the same pi
Size: 1268px × 1969px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramericantechnicalsoci, bookcentury1900, bookdecade1910
