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Electricity problem

  1. Sep 26, 2007 #1
    a heat pump is connected to a 240v, 60hz power line. the compressor has a current draw of 34 amperes when operating. the compressor has a power factor of 70%. the back up strip heat is rated at 10kw. what is the total current draw that will occur if the strip heat comes on while the compressor is operating
     
  2. jcsd
  3. Sep 26, 2007 #2
    Break the compressor current into real and reactive parts. Calculate the current of the strip heater (real). Add the real parts. Total = square root (real^2 + reactive^2)
     
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