A 7970 V 120 V, 60 Hz potential transformer has the following parameters as seen from the high voltage (primary) winding X1 1721 X2 1897 Xm 782k , R1 1378 R2 1602 a Assuming that the secondary is open circuited and that the primary is connected to a 7 97 kV source, calculate the magnitude and phase...

part a The transformer turns ratio is N 7970120 664 The sec ondary voltage will th ...

A 7970-V: 120-V, 60-Hz potential transformer has the following parameters as seen from the high-voltage (primary) winding:

Question:

A 7970-V: 120-V, 60-Hz potential transformer has the following parameters as seen from the high-voltage (primary) winding: X1 = 1721 Ω X2 = 1897 Ω Xm = 782k Ω, R1 = 1378 Ω R2 = 1602 Ω

a. Assuming that the secondary is open-circuited and that the primary is connected to a 7.97-kV source, calculate the magnitude and phase angle (with respect to the high-voltage source) of the voltage at the secondary terminals.

b. Calculate the magnitude and phase angle of the secondary voltage if a 1-kfl resistive load is connected to the secondary terminals.

c. Repeat part (b) if the burden is changed to a 1-k Ω reactance.