Equivalent circuit parameters reduced to single phase and reflected to the primary r1 = 22Ω , r2' = 18Ω , x1 = x2' = 100Ω , Rc = 150 , Xm = 750 three-phase, 50Hz, Y/∆ connected, 60kVA, 4000V:400V a transformer feeds a full load with a power factor cosφ2=0.6 back on its secondary at its rated values. For this study, the transformer's total iron and copper losses, total input and output powers, efficiency and Calculate the regulation. Use approximately equivalent circuit.

Equivalent circuit parameters reduced to single phase and reflected to the primary r1 = 22Ω , r2' = 18Ω , x1 = x2' = 100Ω , Rc = 150 , Xm = 750 three-phase, 50Hz, Y/∆ connected, 60kVA, 4000V:400V a transformer feeds a full load with a power factor cosφ2=0.6 back on its secondary at its rated values. For this study, the transformer's total iron and copper losses, total input and output powers, efficiency and Calculate the regulation. Use approximately equivalent circuit.

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 3.54P: An infinite bus, which is a constant voltage source, is connected to the primary of the...

See similar textbooks

Similar questions

Mr. Musa Al Biruni is analyzing a 100 kVA, 60 Hz, 7200-480V, single phase transformer, which hasthe following parameters expressed in ohms: RHS=3.06, XHS=6.05, XM,HS=17809, RLS=0.014,XLS=0.027, Rfe,HS=71400The transformer is supplying a distribution side load that draws a rated current at 480V and 75percent power-factor lagging. Sketch the appropriate equivalent circuit and determine (a) theequivalent resistance and equivalent reactance referred to high side (b) the input voltage to thetransformer
Primary side-reduced equivalent circuit parameters of a 25 KVA, 50 Hz, 4000/400 Volt transformer R1 = 32 Ω, X1 = 45 Ω, Rc = 250000 Ω, R2 '= 66.14 Ω, X2' = 79.34 Ω, Xm It is given as = 30000 Ω. Since the secondary of the transformer is fed at a full load rated voltage with an advanced power factor of 0.9, for these operating conditions; a) Calculate the primary voltage using the T equivalent circuit. (Only the amplitude of the voltage and the phase value will not be entered.) b) Calculate the efficiency of the transformer. c )Calculate the voltage regulation of the transformer.
A 1100/110V step down single phase transformer has the following parameters. Rc= 2 KΩ, Xm= 1.5 KΩ, R1=4Ω, X1=3 Ω, R2=0.04 Ω, X2=0.03 Ω. If the transformer delivers its output to a load of 5.5 kVA with 0.8 lagging power factor at 110V. Calculate the primary voltage, voltage regulation and the transformer efficiency.
The figure shows an unreduced approximate L-type equivalent circuit to the High voltage (Primary) side of a 30 kVA, 4000V/120V, 60Hz transformer (Here, the parallel arms are shifted to the right, not to the left). In a transformer with parameters RH=1.6 Ohm, RL=1.44 milli Ohm, LH=21 milli Ohm, LL=19 micro Henry, RcH=160 kilo Ohm and LmH=450 Henry;Calculate the phasor V1 on the high voltage side, since it is known that a load with pf=0.6 (lagging) characteristics is connected at VL=120V on the low voltage side, and it is known that P2=20kW power is consumed.
1. A 30KVA, 6000/230V, 50Hz single phase transformer has HV and LV winding resistances of 10.2Ω and0.0016Ω respectively. The equivalent leakage reactance as referred to HV side is 34Ω. Find the voltageto be applied to the HV side in order to circulate the full load current with LV side short circuited. Alsoestimate the full load %regulation of the transformer at 0.8 lagging power factor.
1) An ideal transformer, connected to a 240V mains supplies 12V, 150W lamp. Calculate the transformer turns ratio and current taken from the supply. 2) A 5kVA single phase transformer has turns ratio of 10:1 and is fed from 2.5kV supply. Neglecting losses, Determine; a) full load secondary current b) minimum load resistance which can be connected to the secondary windings to give full load kVA c) primary current at full load. 3) A current of 5A is passed through a 1000 turn coil wound on a circular magnetic circuit of radius 120mm, calculate; a) magnetomotive force b) magnetic field strength
The parameters of a 1000/250V, 50HZ single phase transformer are: R1=1.3 N, X1=2.8 N, R2=0.11 N, X2=0.2 N, R,=250 N, X,=900 N. If the load voltage is 220V, load power is 10kW, and load power factor is 0.8 lagging. Find by using the exact equivalent circuit: (i) Input current, (ii) The input voltage and power factor, (iii) The magnetizing current, (iv) The copper losses, (v) The voltage regulation.
We have 10kVA, 4800/240 V, 50Hz single phase transformer. R1 is measured as R1 = 20 Ω From the short circuit test (secondary short circuited) : Usc = 179V, Psc = 181W, Isc = 2A From the no load test (secondary open circuited) : U20 = 240V, P20 = 60W, I20 = 1,5A When the output power is 10kVA with cosφ2=0,9 inductive, find: Calculate the transformer parameters Iron loss and Copper loss Output power Efficiency "check image - please clearly "
Q22) A 5KVA single phase transformer has a truns ratio of 10:1 and is fed from a 2.5kV supply. Neglecting losses, i) Calculate the full-load secondary current. ii) Estimate the minimum load resistance which can be connected across the secondary winding to give full load K iii) Calculate the primary current at full load KVA.
A step-down transformer is rated 10kVA, 7500/250 V and has the following equivalent circuit parameters:Rp = 2.92 Ω Rs = 0.00432 Ω Rm = 51,840 ΩXp = 14.6 Ω Xs = 0.02160 Ω Xm = 12,960 ΩAssume that this transformer is supplying rated load at 250 V and 0.85 PF lagging.(i)Find the equivalent winding impedance referred to the high voltage side.(ii)Determine this transformer’s input voltage.(iii)Determine its voltage regulation.
A single phase transformer is rated 2400V/240V, 500kVA 50HZ yields the following primary side equivalent parameters R=19ohm, X=0,148ohm, G=4,25x10^-4 S and B=4,14x10^-3 S. By using base values calculate per-unit values for primary side of the transformer (Vbase=2400V, Sbase=500x10^3 VA)
Solve the following problems with complete solutions and unitsusing two(2) decimal digits. Use your own analysis andcomputations. 2. A 3-phase transformer, ratio 33/6.6-kV, Δ-Y, 2-MVA has a primary resistance of 8 Ω per phase and a secondary resistance of 0.08 Ω per phase. The percentage impedance is 7%. Calculate the secondary voltage with rated primary voltage and hence the regulation for full-load 0.75 power factor lagging conditions.