. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . ^ \ k^ s\ \ ^ ^ ^^ S \ \ \ s^ \ \ > a \ N> \ s\ \ \ \ s. N. \ ^ \ \ ^ s. 1 \ \ \ ^ k^^ s ^1 \ X k tr^ k \ s. 9^ -^ K-l N \ \ \ \ s ^ ^ \ \ V \ \ ,& V \ V \ \ \ \ ^ . \ \ \^ v^ o ^ ^ ^ N^ \ ^ :::^ _J ■?g. ?;^S 3 H S ^ * ^ ^ ALTERNATING CURRENT LOSSES 415 300 ^0 1 ^ ^ ^ 1 ^^^ =.^^ e^ p> ^ r^ o 150% / .-^^^ ^ / p^ / y y ,^^^V^ lea^ — — ^ / / / ^ ^ / / / ^ 5\6 50 ^212^- ^ // X ^^ olft Woeres c- = nsSpTperes 20 30 40 Cycles per second 0 10 Fig. 134—Frequency Power Curijes. 80 lb, Rail.


. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . ^ \ k^ s\ \ ^ ^ ^^ S \ \ \ s^ \ \ > a \ N> \ s\ \ \ \ s. N. \ ^ \ \ ^ s. 1 \ \ \ ^ k^^ s ^1 \ X k tr^ k \ s. 9^ -^ K-l N \ \ \ \ s ^ ^ \ \ V \ \ ,& V \ V \ \ \ \ ^ . \ \ \^ v^ o ^ ^ ^ N^ \ ^ :::^ _J ■?g. ?;^S 3 H S ^ * ^ ^ ALTERNATING CURRENT LOSSES 415 300 ^0 1 ^ ^ ^ 1 ^^^ =.^^ e^ p> ^ r^ o 150% / .-^^^ ^ / p^ / y y ,^^^V^ lea^ — — ^ / / / ^ ^ / / / ^ 5\6 50 ^212^- ^ // X ^^ olft Woeres c- = nsSpTperes 20 30 40 Cycles per second 0 10 Fig. 134—Frequency Power Curijes. 80 lb, Rail. A. C, 400 450 500 Amperes per Rail Fig. 135.—Current Power Curves, 80 lb. Rail, A, C. Tests. 416 ELECTRIC RAILWAY TEST COMMISSION Test No. 40. Table LIX. — Losses in Square Section. DiAM. In. Area Sq. Ix. Length Ft. Frequency, 10 Cycles per Second. Ratio Im- Current. Volts. Watts. Impedance. pedance TO Resistance. 526 108 421 141 316 74 263 50 210 31 153 15 103 6 78 2 Frequency, 15 Cycles per Second. 621 322 526 258 421 158 316 99 263 64 210 38 153 20 103 8 78 3 52 Frequency, 20 Cycles per Second. 621 404 526 289 421 220 316 119 283 82 210


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