. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . 1 / n 100 200 300 400 Amperes perlBail 500 600 Fig. 125. —Current Ratio Curves, 55 lb. Rail, A. C. Rail Tests. amperes per rail, for the several given frequencies, includingzero frequency or continuous current. Fig. 132 shows the relation of the ratio of impedance resistance and the frequency, for given values of current;while Fig. 133 shows the same ratio compared with the current, 410 ELECTRIC RAILWAY TEST COMMISSION for several given values of frequency. The data shown aresomewhat
. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . 1 / n 100 200 300 400 Amperes perlBail 500 600 Fig. 125. —Current Ratio Curves, 55 lb. Rail, A. C. Rail Tests. amperes per rail, for the several given frequencies, includingzero frequency or continuous current. Fig. 132 shows the relation of the ratio of impedance resistance and the frequency, for given values of current;while Fig. 133 shows the same ratio compared with the current, 410 ELECTRIC RAILWAY TEST COMMISSION for several given values of frequency. The data shown aresomewhat inconclusive as far as high current densities are 8UU ^ ^ i / X ^ y 1 • ^ 200 s, e 1 ^ / ^ « 1501 / ..eT!^ ^ / t\ h^ <o S 100o -«0 / V / .teft / V / ■^ # / :/ A^ ^ -Ami exes ^/ / ^ {Jib ^ -^ ~210 ( ) 1 0 2 0Cyc 3es p£ 0 4r second 0 50 6C F/gr. 126. —Frequency Power Curves, 56 lb. rail, A. C. Rail Tests. concerned, but they serve to show the general relation of thevariables. Figs. 134 and 135 give the power loss data for the severalcurrents and frequencies per mile of continuous 360 400 450 500 Amperes per Kail 350 60Q Fig. 127, —Current Power Curves, 56 Itf. Rails, A. 0. Rail Tests. ALTERNATING CURRENT LOSSES 411 Tests Nos. 40 to 44. Square, Round, and Pipe Sections.— The limits of this Report have not permitted of a graphicalpresentation of the results of the tests upon sections otherthan standard rail sections. The results of the latter testsare not as satisfactory as those upon standard rail sections;the Executive Committee being obliged to use the materialwhich could be most readily obtained. As several of thesesections were in short lengths and of hard steel, only general
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Keywords: ., bookauthorlouisian, bookcentury1900, bookdecade1900, bookyear1906
