25 A 6000/500-V step down transformer takes 80 A, absorbs 500 W when 25 V is applied to the low voltage winding, the high voltage winding being short circuited. What voltage must be applied to the primary terminals when the output is 120 A at 500 V at unity pf. A. 6114 V 8.6128 V C. 6154 V D. 6272 V

25 A 6000/500-V step down transformer takes 80 A, absorbs 500 W when 25 V is applied to the low voltage winding, the high voltage winding being short circuited. What voltage must be applied to the primary terminals when the output is 120 A at 500 V at unity pf. A. 6114 V 8.6128 V C. 6154 V D. 6272 V

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.32MCQ

See similar textbooks

Similar questions

For the following circuit if the secondary voltage of the transformer is 20V rms, the PIV of the diodes are ZV +1H +1 C3 D₂ D₁ 000 000000000 + C₁ O 55 V O 61.61 V 33 V O56.56 V C₂ HE 2V + m D3 + Ca H 2V
For the following circuit if the secondary voltage of the transformer is 20V rms, the output voltage and the PIV of the diodes are V. 2 Vm C3 D, D2 D3 A D4 C2 C4 + 2Vm 2Vm O 130.1 V, 55 V O 113.1 V, 56.56 V 123.2, 61.61 V 55.5 V, 33 V
1. An ideal transformer with a 450 turn primary connected to a 600 V, 60 Hz supply line needs to output 240 V from the secondary. A 100 load is connected across the secondary. How many turns the secondary must have to output the desired voltage? What is the current through the load? What is the current drawn through the primary?
Determine Rz for a 12 V Zener regulator is used with a dc input of 20 V, a load current of 65 mA, and a Zener current of 20 mA. Rz DC Input Zener R diode 91.4 ohms O 14.9 ohms 49.1 ohms O 94.1 ohms
In the given circuit, a step down transformer with an RMS voltage as 110V /11-0-11 V is used with RL = 1 KO. Assume diode as Germanium and the input frequency is F= 50HZ. D, CT Vin RL D2 1- Name the given circuit. 2- Find The PIV. 3- Find Current trough load resistance. 4- Draw the Input and Output wave forms. all
A 12V rms ac supply is connected to the primary winding of a transformer with a turns ratio of 0.052. calculate the RMS secondary voltage given a voltage regulation of 4.0%.
Q5. For the following center tapped transformer, show the waveform across each half of the secondary winding and across R, when a 100 V peak sine wave is applied to the primarywinding. What is the PIV rating must the diodeshave? (Use constant voltage drop model for the Silicon diode) D IN4001 OV 10 kN IN4001 DELL
5. A power-supply transformer has a secondary voltage if the primary is connected to a 120 V rms source? 6. Determine the peak and average power delivered to RL in figure. turns ratio of 5:1. What is the 2:1 120 V rms 220 N ell lelll
In a step-up transformer, the turn ratio is 1: 20. The resistance of 100 connected across the secondary is drawing a current of 2 A. What are the primary voltage and current respectively?
Determine the peak-to-peak ripple and dc output voltages. The transformer has a 36 Vrms secondary voltage rating, and the line voltage has a frequency of 60 Hz. Use germanium diodes. 110 Vrms 00000 lllll Rsurge www 10 Ω C 100 μF ww RL 3.3 ΚΩ
The rated power of a certain transformer is 1 kVA. The transformer operates at 60 Hz and 120 V ac. at 60 Hz and 120 V ac. The secondary voltage is 600 V. (a) What is the maximum current at the load? (b) What is the smallest RL value that can be excited? (c) What is the largest capacitor that can be connected as a load?
The primary of a current transformer takes 1 A at a power factor of 0.4 when it is connected across a 200-V, 50Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 50 A at a lagging power factor of 0.8 is now connected across the secondary. What is now the value of primary current?