o 0.20 



System 120 — 



1 1 1 I -I 



1 1 1 



119— .>.,.___^ 





- 



14-dav values -^"'" ~~- 



^-^_ 





191 ^^^ 





y 



116 - 



___^^^^^^;;^ 



-^ 



2-hour values — *' "~— -^ 



122______ "" 







1 1 1 1 1 





200 



500 



1,000 



2,000 



5,000 



Frequency (Hz) 

 Figure 20. Dissipation factors at different frequencies for Systems 1 1 1, 

 116, 119, 120, 121, and 122. (Dashed System 119 curve is 

 for values after 2 hours, other curves are for 14-day values.) 



200 500 1,000 2,000 5,000 



Frequency (Hz) 



Figure 21 . Dissipation factors at different frequencies for Systems 112, 

 113, 114, 117, 118, and 123. (All curves based on 14-day 

 values.) 



10,000 



25 



