The following information concerns the operation of a 75 kVA (nominal) real transformer R JX₂ JX, illustrated in the figure, during full load R₂ operation. R₂ = 17 Q R, = 0.005 Q V₂ = 14.4 kV (nominal) V, 240 V (nominal) X₂ = 40 Q2, X, = 0.01 Ω Use the nominal values as base values to calculate the following: a) The equivalent transformer impedance [Q] referred to the secondary side. b) The per-unit equivalent impedance of the transformer referred to the secondary side. c) The equivalent transformer impedance [Q] referred to the primary side.

The following information concerns the operation of a 75 kVA (nominal) real transformer R JX₂ JX, illustrated in the figure, during full load R₂ operation. R₂ = 17 Q R, = 0.005 Q V₂ = 14.4 kV (nominal) V, 240 V (nominal) X₂ = 40 Q2, X, = 0.01 Ω Use the nominal values as base values to calculate the following: a) The equivalent transformer impedance [Q] referred to the secondary side. b) The per-unit equivalent impedance of the transformer referred to the secondary side. c) The equivalent transformer impedance [Q] referred to the primary side.

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 3.33P: Consider the three single-phase two-winding transformers shown in Figure 3.37. The high-voltage...

See similar textbooks

Similar questions

The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d. air core transformer.
For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the rated voltage on the other winding? (a) Yes (b) No
Consider the three single-phase two-winding transformers shown in Figure 3.37. The high-voltage windings are connected in Y. (a) For the low-voltage side, connect the windings in , place the polarity marks, and label the terminals a, b, and c in accordance with the American standard. (b) Relabel the terminals a, b, and c such that VAN is 90 out of phase with Va for positive sequence.
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
SOLVE STEP BY STEP IN DIGITAL FORMAT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 2. A transformer with a 10/1 turns ratio has a maximum flux density of 60,000 lines/in2, when the primary winding is connected to a 2300 V power supply at 60 cps. What will be the maximum flux density if the secondary is connected to a 115 volt supply at 25 cps with the primary open?
Find out the equivalent inductance for the combination when 2 inductances L1 and L2 are connected in parallel such that their fluxes oppose each other Determine the efficiency of the transformer and find out the value of load at which efficiency will be maximum 3
The equivalent resistance of the primary of a transformer having K = 5 and R₁ = 0.1 ohm when referred to secondary becomes ............. ohm a) 0.5 b) 0.02 c) 0.004 d) 2.5
Transformer 1) Enumerate the way/s by which the voltage of the large coil may be: a) increased (AC source) b) reduced to zero (AC source) c) increased (DC source) d) reduced to zero (DC source)
In the circuit in Figure 2, the capacitor connected to the a-b terminals of the transformer anda circuit consisting of resistance is defined as a load circuit. a)Find the average power spent by the load circuit? b) How much of the average power calculated in a) by the resistance in the load circuit and how muchspent by the capacitor? Comment on the results obtained?
A transformer has primary and secondary turns of 1250 and 125 respectively. It has core cross-sectionof 36 cm2 and its rms flux density is to be limited to 1.4 T (to prevent core saturation). Whatmaximum 50 Hz voltage can be applied on the primary side and the corresponding open-circuitsecondary voltage?The core has a mean length of 150 cm and its relative permeability can be assumed to be 8000. Whatwould be the rms exciting current when the transformer’s primary winding is excited at a voltage ascalculated above? Also calculate the magnetizing susceptance as seen from primary and secondarysides.If the transformer were to be excited at 60 Hz, 1. What should be the maximum primary voltage for thecore flux density limit not to be exceeded? 2. What would be the magnetizing susceptance as seen oneach side in this case?
With base MVA of 150 and base voltage of 33. If the reactance of the transformer is 0.23 pu. The parameter of the reactance of the transformer in the Neplan software is O 1.66 2.30 23 0.23 O Non of them
The core of a transformer operating at 50 Hz has an eddy current loss of 100 W/m3 and the corelaminations have a thickness of 0.50 mm. The core is redesigned so as to operate with the same eddycurrent loss but at a different voltage and at a frequency of 250 Hz. Assuming that at the new voltage themaximum flux density is one-third of its original value and the resistivity of the core remains unaltered,determine the necessary new thickness of the laminations. Clear and detailed solution.