Question

Problem 4: A single phase 60 Hz two-winding power transformer is rated at 2400V/240V and 100...

Problem 4: A single phase 60 Hz two-winding power transformer is rated at 2400V/240V and 100 kVA. If an
autotransformer is built from this conventional transformer to supply a load at 2400V with supply voltage
2640V. Draw the autotransformer and calculate the voltage, current and apparent power rating of the auto
transformer. Also calculate the apparent power rating advantage of autotransformer over conventional
transformer.

Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A single phase transformer rated at 3000 KVA, 69kV, 60 Hz has a total internal impedance...
A single phase transformer rated at 3000 KVA, 69kV, 60 Hz has a total internal impedance Zp of 127ohm, referred to the primary side. Calculate: a) primary and secondary currents b) voltage regulation from no load to full load for 2000 kW resistive load, knowing that the primary voltage supply is fixed at 69 kV. c) primary and secondary currents if the secondary is accidentally short circuited.
A 20 kVA single phase transformer 4800/480V has primary resistance and reactance of 5Ω and 15Ω...
A 20 kVA single phase transformer 4800/480V has primary resistance and reactance of 5Ω and 15Ω respectively, while the resistance and reactance of secondary winding is 0.1Ω and 0.15 Ω respectively. Calculate: (i) The parameter referred to primary side of transformer and draw the equivalent circuit (ii) The approximate value of secondary voltage at full load power factor of 0.8 lagging if 4.8kV primary supply
Problem 2. A three phase transformer rated at 5 MVA, 115/13.2 kV has a per phase...
Problem 2. A three phase transformer rated at 5 MVA, 115/13.2 kV has a per phase series impedance of 0.007 + j0.075 per unit (shunt parameters are ignored). The low voltage side is connected to a short distribution line which modeled by a series per phase impedance of 0.02 +j0.1 per unit on the base of 10 MVA. The line supplies a balanced three phase constant impedance load at 4 MVA, 13.2 kV with power factor of 0.85 lagging •...
Transformer Specifications S = 100 kVA 4800 – 240 V 60 Hz Core Loss = 0.5%...
Transformer Specifications S = 100 kVA 4800 – 240 V 60 Hz Core Loss = 0.5% Resistance = 1.5% Reactance = 3.4% It is operating at rated conditions with an 80% power factor. a. Determine the efficiency at the rated load. b. Determine the efficiency at 70% of the rated load and 80% power factor.
A 10-kVA, 250 / 100-V, 50-Hz single-phase transformer gave the following open and short circuit test...
A 10-kVA, 250 / 100-V, 50-Hz single-phase transformer gave the following open and short circuit test results: Open circuit test: 250 V, 2.6 A, power factor: 0.3 on HV side. Short circuit test: 18 V, 80 A, input power: 240 W on HV side. Calculate the following: 4.1 The equivalent circuit parameters of the transformer. (6) 4.2 The efficiency at full load unity power factor. (NB the test current is not at full load) (6) 4.3 The load at which...
A 400-k VA, 2300 230, 60-hz transformer supplies a 0.8 lagging power-factor load whose KVA Is...
A 400-k VA, 2300 230, 60-hz transformer supplies a 0.8 lagging power-factor load whose KVA Is adjustable from no load to 120 percent rated KVA. The percent resistance, percent reactance, and percent core loss are 56, 3.16, and 0.42 respectively. For 2 KVA increments of load, tabulate and plot the efficiency of the transformer from no load to 120 percent rated load. Please state the formulas clearly
Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V,...
Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V, 50 Hz, io = 1.2%; ukN = 6%, idle losses 2450 W, rated copper losses of power 14500 W; Dy5. a) Calculate primary and secondary line and phase currents. b) Secondary at 75% load in power factor with 0.85 inductance and 0.85 capacity calculate the voltage separately. Compare and interpret the results. capacity at what time of day can the upload be seen? To...
Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V,...
Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V, 50 Hz, io = 1.2%; ukN = 6%, idle losses 2450 W, rated copper losses of power 14500 W; Dy5. a) Calculate primary and secondary line and phase currents. b) Secondary at 75% load in power factor with 0.85 inductance and 0.85 capacity calculate the voltage separately. Compare and interpret the results. capacity at what time of day can the upload be seen? To...
A 2.2 KVA, 440---220 V, 60 Hz, step-down transformer has the following parameters: Rp= 3.0 Ω,...
A 2.2 KVA, 440---220 V, 60 Hz, step-down transformer has the following parameters: Rp= 3.0 Ω, Xp= 4.0 Ω, Rs= 2.5 Ω, Xs= 2.0 Ω, Rc= 60 KΩ, and Xm = 15 KΩ. The transformer is operating at full load with a power factor of 0.707 lagging. The magnetizing branch impedance can be ignored. a) Draw the transformer’s equivalent T-circuit, b) Find the equivalent winding impedance referred to the high side, c) Calculate the primary and secondary currents, d) Determine...
Plate values of a three-phase transformer are given below: 1600 kVA, 15 kV / 0,4 kV,...
Plate values of a three-phase transformer are given below: 1600 kVA, 15 kV / 0,4 kV, 50 Hz, i0 = 1.2%; ukN= 6%, idle losses 2450 W, rated power copper losses 14500 W; Dy5 connected.. III) There is 75% load in the power factor with 0.85 inductance and 0.85 capacity. At what times of the day can capacity loading be seen? What solution should be applied to prevent voltage change? IV) Draw the fastening group. How can this transformer be...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT