پارامتر های برق

I = Amperes      E = Volts       kW = Kilowatts         kVA = Kilo volt-Amperes

HP = Horsepower      %eff. = Percent Efficiency       pf = Power Factor

 

برای تک فازSingle-Phase 

TO FIND :

• Amperes when kVA is known –>   I = kVA x 1000 / E
• Amperes when horsepower is known –>  ( HP x 746) / ( E  x  % eff.  x pf )
• Amperes when kilowatts are known –>  ( kW x 1000 ) / ( E x pf )
• Kilowatts  –>  ( I x E x pf ) /1000
• Kilovolt-Amperes  –>  ( I x E ) / 1000
• Horsepower  –>  ( I x E x % eff. x pf  ) / 746
• Watts   –>  E x I x pf
• Energy Efficiency  –>  Load Horsepower x 746 / Load Input kVA x 1000
• Power Factor  @ cos θ –>  Power Consumed /ApparentPower ( W / VA ) @ ( kW / kVA )

Two-Phase  برای دو فاز

TO FIND :

• Amperes when kVA is known –>   I = ( kVA x 1000 )  / ( E x 2 )
  
• Amperes when horsepower is known –>  ( HP x 746) / ( E  x  2  x % eff.  x pf )
• Amperes when kilowatts are known –>  ( kW x 1000 ) / ( E x 2 x pf )
• Kilowatts  –>  ( I x E x 2 x pf ) /1000
• Kilovolt-Amperes  –>  ( I x E x 2 ) / 1000
• Horsepower  –>  ( I x E x 2 x % eff. x pf  ) / 746
• Watts   –>  E x I x 2 x pf
• Energy Efficiency  –>  Load Horsepower x 746 / Load Input kVA x 1000
• Power Factor  @ cos θ –>  Power Consumed /ApparentPower ( W / VA ) @ ( kW / kVA )

Three-Phase   برای سه فاز

TO FIND :

• Amperes when kVA is known –>   I = ( kVA x 1000 )  / ( E x 1.73 )
  
• Amperes when horsepower is known –>  ( HP x 746) / ( E  x  1.73  x % eff.  x pf )
• Amperes when kilowatts are known –>  ( kW x 1000 ) / ( E x 1.73 x pf )
• Kilowatts  –>  ( I x E x 1.73 x pf ) /1000
• Kilovolt-Amperes  –>  ( I x E x 1.73 ) / 1000
• Horsepower  –>  ( I x E x 1.73 x % eff. x pf  ) / 746
• Watts   –>  E x I x 1.73 x pf
• Energy Efficiency  –>  Load Horsepower x 746 / Load Input kVA x 1000
• Power Factor  @ cos θ –>  Power Consumed /ApparentPower ( W / VA ) @ ( kW / kVA )