  
 example 4 22   
 total energy requirement 1.20e+006kWH 
 maximum demand 375KVA 
 (a)HV supply   
 cost of HV equipment Rs1.875000e+005
 interest and depreciation charges Rs22500 
 energy received 1.263158e+006kWh
 demand charges Rs18750 
 energy charges Rs1.263000e+006 
 total annual cost Rs1304250 
 (b) LV supply   
 demand charges Rs22500 
 energy charges Rs1e+006 
 total annual cost Rs1342500 
 difference in annual cost Rs38250 