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Ohm's law - calculator D6 Mobile  
Free technical programs - Visit the website: Tecnico Facile.com  
  Data                      
 
  V Voltage Volt V    
              I Current Ampere A    
 
  R Resistance Ohm W    
  Results in: Volt Ampere Ohm Watt   P Power Watt W    
  Direct current V I R P   Fattore di potenza phase shift n cos φ    
                 
Results in:
  Alternating current Cos Ø V I R P (Watt) P= V x I x cos φ        
               
Results in:
  Three phase alternating current Cos Ø √3 V I R P (Watt) P= V x I x cos φ x 1,73      
             
  In blue changeable values   Power factor =  cos φ =  P active = VI cos φ    
          P apparent VI    
                     
Ohm's law - calculator D6 Desktop  
Free technical programs - Visit the website: Tecnico Facile.com  
  Data                      
 
  V Voltage Volt V    
              I Current Ampere A    
 
  R Resistance Ohm W    
  Results in: Volt Ampere Ohm Watt   P Power Watt W    
  Direct current V I R P   Fattore di potenza phase shift n cos φ    
                 
Results in:
  Alternating current Cos Ø V I R P (Watt) P= V x I x cos φ        
               
Results in:
  Three phase alternating current Cos Ø √3 V I R P (Watt) P= V x I x cos φ x 1,73      
             
  In blue changeable values   Power factor =  cos φ =  P active = VI cos φ    
          P apparent VI    
               
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Triangle Ohm  
If one bears in mind the triangle, it will be easy to trace the various operations: To obtain one of the values below, we have to divide the one above the other. To get to the above must be multiplied by those from below.  
 
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formulario.jpg
 
               
    V= I =   V R =   V    
    I x R R I    
                 
        The Ohm's circle    
                 
Typical values cos φ
equipment Power factor cos φ
asynchronous motor with load factor at 0% 0,17
asynchronous motor with load factor to 25% 0,55
asynchronous motor with load factor 50% 0,73
asynchronous motor with load factor 75% 0,8
asynchronous motor with load factor 100% 0,85
Incandescent lamps 1
Fluorescent lamps without power factor compensation 0,5
power factor corrected fluorescent lamps 0,93
Discharge lamp 0,4 - 0,6
Furnaces Resistance 1
Induction furnaces 0,85
Furnaces dielectric loss 0,85
points welder 0,8 - 0,9
arc welding powered by single-phase solid state relay 0,5
arc welding powered by rotating assembly 0,7 - 0,9
arc welding powered by transformer / rectifier 0,7 - 0,8
arc furnaces 0,8