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electrical engineening
Last Post 25 Mar 2012 05:02 AM by missDH2. 1 Replies.
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missDH2
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25 Mar 2012 12:28 AM
    hello guys... can you all help with this question.. thanks a lot..
    Question 2
    A residential electric supply three-wire circuit from transformer is shown in Figure 2 (a) below while the circuit model in Figure 2 (b).From its nameplate, the refrigerator is known to have rated current of 8.5 A rms. It is reasonable to assume an inductive impedance angle of 45˚ for a small motor at rated load. Lamp and range loads are 100W and 12 kW, respectively.
    a) Calculate the current in line 1, line 2 and neutral line.
    b) Calculate Prefrig, Qrefrig, Plamp, Qlamp, Ptotal, Qtotal, Stotal and overall power factor.
    c) The neutral connection resistance increases, because of corrosion and looseness, to 20 Ohm (this must be included as part of neutral wire). Use mesh analysis and calculate the voltage across the lamp.

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    missDH2
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    Posts:2

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    25 Mar 2012 05:02 AM
    pls. help me with this question .. please... :"(


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