A three phase engine has an usable power of 90 kW and an efficiency of 91%....

A three phase engine has an usable power of 90 kW and an efficiency of 91%. The rating plate indicates the following values:
- 90 kW
- Power factor: 0.89 (i)
- Voltage (volts): 230 delta - 400 wye
Taking as a reference of line voltages V1=V∠90º; direct sequence and a phase oltage of the supply network of 230 V, find:
a) The phasors of the line and phase voltages of the supply network
b) The true, reactive and apparent power
c) The phasors of the line and phase currents
When the engine is connected to a supply network of 400 V and direct sequence, find:
d) The phasors of the line and phase voltages of the supply network
e) The true, reactive and apparent powers
f) The phasors of the line and phase currents

Expert Solution

Manojponduru answered 7 months ago

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