Engineering Board Exam Reviewer · Three-Phase Systems in Power Applications · medium
A balanced wye-connected load, with Z=16+j12, in each phase, is supplied from a three-phase line of 400 V (line-to-line, rms). Find the total real power absorbed by the load.
- 8 kW
- 6.4 kW
- 11.1 kW
- 12.8 kW
Answer
B. 6.4 kW
Solution
Vph=VL/ 3= 400 V 3=231 V and |Z|=20, . IL= Vph|Z|=11.5 A. Each phase dissipates I2R, so P=3I2R=3(11.5 A)2(16, )=6.4 kW.
More Three-Phase Systems in Power Applications questions
- A balanced wye-connected load, with Z=15+j20, in each phase, is supplied from a three-phase line of 208 V (line-to-line, rms). Find the…
- In a balanced three-phase, four-wire wye system the current in the neutral conductor is
- A balanced three-phase load draws 10 A from a 400 V line at a power factor of 0.8. What total real power does it absorb?
- A wye-connected three-phase source has a line-to-line voltage of 480 V. What is its phase voltage?
- The three voltages of a balanced three-phase supply are displaced from each other by
- In a balanced delta-connected load, the relationship between the line current IL and the phase current Iph is
- In a balanced wye-connected system, the relationship between the line voltage VL and the phase voltage Vph is
- The balanced wye-connected load shown is supplied from a three-phase line of 240 V (line-to-line, rms). What is the voltage across each…
- A balanced three-phase resistive load is connected in delta. One of the three line wires opens. Compared with the original total power…
- In a balanced three-phase system with abc (positive) phase sequence, VAN=120 0° V. Find the line voltage VBC=VBN-VCN in polar form.