Impulse RT750

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   
         .          
       .           
.       
(MHR)      =(THR) =    
220 –      = (MHR)
MHR × 0.60 =60       %
MHR × 0.75 =75       %
    
30 :         
220-30=190
190×0.60=114   )60  %MHR(
190×0.75=142   )75  %MHR(
    (THR) 30   114 142
     
   .                
      .       .       
.          