Transformer Indicator Diagrams. 

 Table II. — Non-inductive Load. 



479 



1st Harmonic. 



Output 



Iron loss 



Copper loss, I. 

 Copper loss. II. 



Sum 



Input 



499-80 

 2563 

 12-79 



971 

 547-93 

 543-8 



i-d Harmonic. 



2-53 

 •24 



•07 



•05 



2-89 



3-02 



Total. 



502 33 



25-87 



12-S6 



9-76 



550-82 

 546-82 



Table III. — Inductive Load. 



1st Harmonic. 



3rd Harmonic. 



Total. 



Output ' 340-5 



•51 

 •01 

 ■01 



02 



•55 

 •69 



■ 



341-01 



23-19 



12-30 



9-15 



385-65 



386-69 



Copper loss, I. ... 1229 



Copper loss, IT.... 9" 13 

 Sum 1 38510 



! Input | 3860 



The output in Table III. is the mean value of E 2 C 2 . A 

 second determination of it, obtained from the mean value of 

 RC 2 2 , where E is the external resistance (76*52 ohms), gives 

 342-86 watts as against 341. 



8. Other tests can be applied to the harmonic expressions 

 given in § 5, and though their results may not be so good as 

 those in § 7, vet they will prove fairly satisfactory when the 

 number of independent determinations involved in obtaining 

 each series is considered. 



Thus the pressure drop from E : to E 2 /6 is too small in both 

 series 2 and 3 ; and this is probably due to a common error 

 or errors. Moreover the speed never remained quite constant 

 throughout a complete series. Again in series 3, knowing 

 the external secondary resistance, and assuming as correct 

 tbe value given for the external inductance ('212 henry), C 2 

 can be calculated from E 2 . When this is done we find that 



C 2 ='2966 sin (c^-232'58) --014 sin 3(^-213) 



-•002 sin 5 {at -239), 



which agrees well with the value of C 2 obtained with the 

 wave-tracer. 



Conversely from E 2 and C 2 obtained with the wave-tracer, 



