Q1 Example 8-11. A 5000 hp, wye-connected motor is connected to a 4000 V (line-to-line), 3-phase, 60 Hz line (Fig. 8.21)

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Q1 Example 8 11 A 5000 Hp Wye Connected Motor Is Connected To A 4000 V Line To Line 3 Phase 60 Hz Line Fig 8 21 1 (46.21 KiB) Viewed 44 times

Q1 Example 8-11. A 5000 hp, wye-connected motor is connected to a 4000 V (line-to-line), 3-phase, 60 Hz line (Fig. 8.21). A delta-connected capacitor bank rated at 1800 kvar is also connected to the line. If the motor produces an output of 3594 hp at an efficiency of 93 percent and a power factor of 90 percent (lagging), calcu- late the following: a. The active power absorbed by the motor b. The reactive power absorbed by the motor c. The reactive power supplied by the transmission line d. The apparent power supplied by the transmission line e. The transmission line current f. The motor line current g. Draw the complete phasor diagram for one phase Om 4000 V 3-phase 3504 HP O 1-92% Fp - 90% 46 1800 kvar Figure 8.21 Industrial motor and capacitor. See Example 8-11. Answer: Pm=2883 kW Sm=3203 kVA Qm 1395 kVAR QL-405 KVAR IL=420 A Im = 462 A ELN=2309 V Theta =25,8 Ic=260 A #11 #1