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Question: en2000electrical engineering page 5 of 6 total 20 a 400...

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EN2000-ELECTRICAL ENGINEERING (PAGE 5 OF 6) [Total: 20] A 400 V (50 Hz) (RMS) three-phase supply supplies the following balanced star-connected three- Question 4 phase loads (powers are the total for all three phases) ten 100 kW induction motors with power factors of 0,8 lagging and efficiencies of 0,93 300 k two 60 kW heating loads (unity power factor) W of modern compact fluorescent lighting with a power factor of 0,95 leading (a) With no power factor correction capacitors connected, determine (i) (ii) (ii) (iv) The total customer average power The total customer apparent power The total customer supply line current The total customer power factor With three star-connected power factor correction capacitors connected, such that the power factor is corrected to 0,94 (lagging) determine (b) (i) (ii) The total customer supply line current and apparent power The value of capacitance (star connected) connected (in F and in kVAr) Total: 20]

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