Three-phase, 50 Hz 34500/10500 delta-star connected transformer, single phase visible on high voltage (primary) windings side equivalent circuit parameters are given below. Each of the low voltage (secondary) windings of this transformer When a 7.5 ohm star connected resistive load is connected and the rated voltage is applied to the high voltage windings find transformer efficiency. Total iron losses of three phases will be taken as 85000 W. Primer sargı iç direnci (R1) Primer sargı kaçak reaktansı (X1) Sekonder sargı iç direnci (primere taşınmış) (R2') Sekonder sargı kaçak reaktansı (primere taşınmış) (X2') 1,25 2 1,85 2 1,25 2 1,82 2

Three-phase, 50 Hz 34500/10500 delta-star connected transformer, single phase visible on high voltage (primary) windings side equivalent circuit parameters are given below. Each of the low voltage (secondary) windings of this transformer When a 7.5 ohm star connected resistive load is connected and the rated voltage is applied to the high voltage windings find transformer efficiency. Total iron losses of three phases will be taken as 85000 W. Primer sargı iç direnci (R1) Primer sargı kaçak reaktansı (X1) Sekonder sargı iç direnci (primere taşınmış) (R2') Sekonder sargı kaçak reaktansı (primere taşınmış) (X2') 1,25 2 1,85 2 1,25 2 1,82 2

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 3.16P: A single-phase, 50-kVA,2400/240-V,60-Hz distribution transformer has the following parameters:...

See similar textbooks

Similar questions

For an ideal transformer, the efficiency is (a) 0 (b) 100 (c) 50
A single-phase step-down transformer is rated 13MVA,66kV/11.5kV. With the 11.5 kV winding short-circuited, rated current flows when the voltage applied to the primary is 5.5 kV. The power input is read as 100 kW. Determine Req1andXeq1 in ohms referred to the high-voltage winding.
The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d. air core transformer.
For an ideal 2-winding transformer, an impedance Z2 connected across winding 2 (secondary) is referred to winding 1 (primary) by multiplying Z2 by (a) The turns ratio (N1/N2) (b) The square of the turns ratio (N1/N2)2 (c) The cubed turns ratio (N1/N2)3
Rework Problem 3.14 if the transformer is delivering rated load at rated secondary voltage and at (a) unity power factor, (b) 0.8 power factor leading. Compare the results with those of Problem 3.14. -
A single-phase, 50-kVA,2400/240-V,60-Hz distribution transformer has the following parameters: Resistance of the 2400-V winding: R1=0.75 Resistance of the 240-V winding: R2=0.0075 Leakage reactance of the 2400-V winding: X1=1.0 Leakage reactance of the 240-V winding: X2=0.01 Exciting admittance on the 240-V side =0.003j0.02S (a) Draw the equivalent circuit referred to the high-voltage side of the transformer. (b) Draw the equivalent circuit referred to the low-voltage side of the transformer. Show the numerical values of impedances on the equivalent circuits.
All values of a transformer are proportional to its __________________ ___________________.
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.
Answer only please The resistance of a transformer winding is 0.25 ohm at 25oC. When operating at full load, the temperature of the winding is 75oC. The temperature coefficient of resistance for copper at 0oC is 0.00427 per oC. What is the winding resistance at full load? a. 0.512 ohm b. 0.315 ohm c. 0.298 ohm d. 0.271 ohm
Three-phase, 50 Hz 34500/10500 T/S connected transformer single-phase visible on the side of the high voltage (primary) windings Equivalent circuit parameters are given below. Each of the low voltage (secondary) windings of this transformer When a 7.5 ohm star connected resistive load is connected and the rated voltage is applied to the high voltage windings Find the transformer efficiency. Total iron losses of three phases will be taken as 85000 W. Primary winding internal resistance (?1) 1,85 ohm Primary winding leak reactance (?1) 1,25 ohm Secondary winding internal resistance (moved to primary) (?2′) 1,82 ohm Secondary winding leakage reactance (primary moved) (?2′) 1,25 ohm
Please explain each step
Seconday winding of transformer is made-up of material. O insulated CRGO conductor O insulated copper conductor O Cold Rolled Grain Oriented (CRGO) conductor Cold Rolled Grain Oriented (CRGO) Silicon Steel