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1. A balanced delta connected load of impedance Z0 = (17 + j13) Ω is supplied 3-phase electrical energy from a synchronous generator. Its supply line voltage is given by the following expression:

767_Determine the loads phase currents.png

 

Determine:

(a) The loads phase currents.
(b) The line currents.
(c) The power taken by the delta load

2. An unbalanced delta load has the follow impedances:

Z12 = (15+ j5)Ω

Z23 = (30)

Z31 = (415+ j15)Ω

it is supplied from a 3-phase synchronous generator via tables and Is connected across this balanced 3-phase line voltages given by:

1328_Determine the loads phase currents1.png

calculate

(a) The current in each leg of the delta.
(b) The line currents.
(c) The power delivered to the load

3. Explain, with relevant diagrams, the difference between delta and star loads in 3-phase electrical systems and the voltages, currents and powers in each leg.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M91058028

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