Question: A three phase Y connected balanced load having phase impedance of 4 0 + j 3 0 , The neutral is grounded through a 1

three

phase

connected

balanced

load

having

phase

impedance

40 +

30,

The

neutral

grounded

through

10

resistor

.

Find

the

sequence

impedance

matrix

.

Using

symmetrical

components,

determine

the

phase

currents

when

connected

unbalanced

supply

voltages

= 380 0

,

= 280 140

and

= 160 90

.

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