From: noone@nospam.com   
      
   Στις 11/3/2020 3:33 μ.μ., ο J.B. Wood έγραψε:   
   > On 3/11/20 9:02 AM, Dimitris Tzortzakakis wrote:   
   >   
   >> as I am sure you know, measuring the PF on MV lines would need to   
   >> interrupt the circuit and mount potential and current transformers to   
   >> feed the measuring equipment.   
   >   
   > Hello, and that would certainly be the way via direct measurement, but   
   > hardly practical if you're dealing with something like a 34.5/19.9 kV   
   > 4-wire distribution system, as is common in my residential environs. I'm   
   > unsure if MV PF measurement equipment even exists.  Sincerely,   
   >   
   >   
   Certainly as big consumers are billed with real energy, also kWh, and   
   reactive energy (kVArh). There is a formula to calculate the PF. So if   
   the utility knows that downstream there are two factories, with, say a   
   PF of .60, will know what capacitors to use. There is also a penalty if   
   their PF is too boad (too much reactive). economical penalty-so   
   sometimes it is worth to do PF compensation on site. with capacitors   
   goes without saying.the compensation is being done on the low side   
   (230/400 Volt in Europe).   
      
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