Question

QUESTION 3 31A cable is required to supply a welding set taking a current of 225 A at 110 V alternating current, the average power factor being 0 5 lagging An available cable has a rating of 175 A and it is decided to use this cable by installing a capacitor across the terminals of the welding set Fınd 311 the required capacitor current and reactive power to limit the cable current to 175 A the overall power factor with the capacitor in circuit 312 32 A 230 V, single-phase supply feeds the following loads (a) incandescent lamps taking a current of 8 A at unity power factor, (b) fluorescent lamps taking a current of 5 A at 0 8 leading power factor, (c) a motor taking a current of 7 A at 0 75 lagging power factor 321 Sketch the phasor diagram 322 Determine the total current, 3 23 Active power and reactive power taken from the supply 323 The overall power factor [20]

Answer 1

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p+29 2. 36626-12656.25 : ↓17968.45 13404A Regad pocitor urren e 194-85-134. Oy 606- 60 8 1ox9C aco 60-8 The 6ver poe -l cowrth the capoo sing 2-792 /12

6 2659 cp9:49.987 .、 P 1 ) = cos(4) p12 こcos C49, 987 ) Pc