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Problem (1): A 15-KVA, 2400:240-V, 60 Hz transformer has the following equivalent circuit parameters: R =...
The short-circuit test readings for a 50-kVA 2400:240-V transformer are 48 V, 20.8 A, and 617...
The short-circuit test readings for a 50-kVA 2400:240-V transformer are 48 V, 20.8 A, and 617 W, with the instruments located on the high-voltage side and the low-voltage side short- circuited. An open-circuit test with the low-voltage side energized gives instrument readings on that side of 240 V, 5.41 A, and 186 W. 1. Calculate the equivalent parameters of the transformer as referred to the high-voltage side. 2. Draw the equivalent approximate circuit of that transformer referred to the high...
Q1: A 20-kVA 8000/480-V distribution transformer has the following resistances and reactances: Rp...
Q1: A 20-kVA 8000/480-V distribution transformer has the following resistances and reactances: Rp 322 X,-45 Ω R,-0.05 Ω X,-0.06 Ω The excitation branch impedances are given referred to the high-voltage side of the transformer. (a) Find the equivalent circuit of this transformer referred to the high-voltage side. (b) Assume that this transformer is supplying rated load (20kVA) at 480 V and 0.8 PF lagging. What is this transformer's input voltage? What is its voltage regulation? (c) What is the transformer's...
1) A single-phase 50-kVA, 2400/240 volt, 60 Hz distribution transformer is used as a step-down tr...
1) A single-phase 50-kVA, 2400/240 volt, 60 Hz distribution transformer is used as a step-down transformer at the load end of a 2400-volt feeder whose series impedance is (1.0+2.0) Ω. The equivalent series impedance of the transformer is (10+j25) Ω referred to the high voltage (primary) side. The transformer is delivering rated load at 0.8 power factor lagging and at rated secondary volitage. Neglect the transformer exciting curent. Using the transtormer raltings as base quantities work this problem in per...
13. The parameters of the equivalents circuit of a 150 kVA, 2400/240 V transformer are: Ri-...
13. The parameters of the equivalents circuit of a 150 kVA, 2400/240 V transformer are: Ri- 0.2 Q, X1= 0.45 Q, X2-4.5 x 103 , R2=2 x 103 Q, Xm= 1.6 k0, Rc 10 kQ as seen from 2400 volts side. Calculate: Open circuit current, power and PF when LV side is excited at rated voltage [23.69 mA; 5.6 W; 0.987] i. The voltage at which the HV side should be excited to conduct a short-circuit test (LV side) with...
A 20 kVA, 60 Hz, 2400/240 V single-phase distribution transformer has been tested to determine its...
A 20 kVA, 60 Hz, 2400/240 V single-phase distribution transformer has been tested to determine its equivalent circuit. The results of the test are shown below: Open circuit Test (on low voltage side) Voc=240V, Ioc=1.028A, Poc=122W. Short circuit test (On high voltage side) Vsc=61.3V, Isc=8.33A, Psc=257W. The transformer is supplying power to a load that draws 15 kVA at 240 V. The load power factor is 0.90 lagging. Calculate the voltage regulation for this operation condition.
4. The figure below shows the equivalent circuit of a 2400/240-V, 60-Hz transformer. The high-side leakage...
4. The figure below shows the equivalent circuit of a 2400/240-V, 60-Hz transformer. The high-side leakage impedance is (1.2+j 2.0) 2. the low-side leakage impedance is (0.012 ti 0.02) S2, and Xm at the high-side is 1800 2. Neglect the Hysteresis and Eddy current loss resistance Rhe Calculate the input voltage if the output voltage is 240 V (rms). Given the load resistance is 1.5 12 and the power factor is 0.8 (lagging). ཉིས་པ་དེ། དེ་ | ༼ ། ༼། །
A single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm...
A single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm magnetizing reactance referred to the high-voltage side. If rated voltage is applied to the high-voltage winding, calculate the open-circuit secondary voltage. Neglect 'R and G^V losses. Assume equal series leakage reactances for the primary and the referred secondary
6. A 20 kVA. 60 Hz, 8000/277 V transformer has the following impedances referred to the high volt...
6. A 20 kVA. 60 Hz, 8000/277 V transformer has the following impedances referred to the high voltage side: Req-320, xe,-45Ω,R.-250kQ,Xm-30kQ. A) Calculate the voltage across rated load impedance with PF= 0.707 lagging when the transformer is connected to rated input voltage. B) Draw the phasor diagram showing the load voltage and current, voltage drop across the series impedance and voltage at the low voltage side of the ideal transformer, C) Calculate the efficiency of the transformer D) What adjustments...
please solve it clearly A 1000-VA, 230/115-V has the following equivalent circuit parameters Referred to high...
please solve it clearly
A 1000-VA, 230/115-V has the following equivalent circuit parameters Referred to high voltage side Referred to low voltage side Req=0.503 Ohm Rc=3383 Ohm Xeq=1.905 Ohm XM=1099 Ohm (Find the expected values for the open and short circuit tests and fill the following table (show all steps Short Circuit test (High voltage side) =VSC - Isc-rated current Pse Open Circuit test (Low voltage side) -Voc -Ioc Poc Then .a) Find the equivalent circuit of this transformer referred...
A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which...
A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which is connected to the 240-volt secondary winding, absorbs 80 kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: a) primary voltage. b) load impedance. c) load impedance referred to the primary. d) the real and reactive power supplied to the primary winding
The short-circuit test readings for a 50-kVA 2400:240-V transformer are 48 V, 20.8 A, and 617 W, with the instruments located on the high-voltage side and the low-voltage side short- circuited. An open-circuit test with the low-voltage side energized gives instrument readings on that side of 240 V, 5.41 A, and 186 W. 1. Calculate the equivalent parameters of the transformer as referred to the high-voltage side. 2. Draw the equivalent approximate circuit of that transformer referred to the high...
Q1: A 20-kVA 8000/480-V distribution transformer has the following resistances and reactances: Rp 322 X,-45 Ω R,-0.05 Ω X,-0.06 Ω The excitation branch impedances are given referred to the high-voltage side of the transformer. (a) Find the equivalent circuit of this transformer referred to the high-voltage side. (b) Assume that this transformer is supplying rated load (20kVA) at 480 V and 0.8 PF lagging. What is this transformer's input voltage? What is its voltage regulation? (c) What is the transformer's...
1) A single-phase 50-kVA, 2400/240 volt, 60 Hz distribution transformer is used as a step-down transformer at the load end of a 2400-volt feeder whose series impedance is (1.0+2.0) Ω. The equivalent series impedance of the transformer is (10+j25) Ω referred to the high voltage (primary) side. The transformer is delivering rated load at 0.8 power factor lagging and at rated secondary volitage. Neglect the transformer exciting curent. Using the transtormer raltings as base quantities work this problem in per...
13. The parameters of the equivalents circuit of a 150 kVA, 2400/240 V transformer are: Ri- 0.2 Q, X1= 0.45 Q, X2-4.5 x 103 , R2=2 x 103 Q, Xm= 1.6 k0, Rc 10 kQ as seen from 2400 volts side. Calculate: Open circuit current, power and PF when LV side is excited at rated voltage [23.69 mA; 5.6 W; 0.987] i. The voltage at which the HV side should be excited to conduct a short-circuit test (LV side) with...
4. The figure below shows the equivalent circuit of a 2400/240-V, 60-Hz transformer. The high-side leakage impedance is (1.2+j 2.0) 2. the low-side leakage impedance is (0.012 ti 0.02) S2, and Xm at the high-side is 1800 2. Neglect the Hysteresis and Eddy current loss resistance Rhe Calculate the input voltage if the output voltage is 240 V (rms). Given the load resistance is 1.5 12 and the power factor is 0.8 (lagging). ཉིས་པ་དེ། དེ་ | ༼ ། ༼། །
A single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm magnetizing reactance referred to the high-voltage side. If rated voltage is applied to the high-voltage winding, calculate the open-circuit secondary voltage. Neglect 'R and G^V losses. Assume equal series leakage reactances for the primary and the referred secondary
6. A 20 kVA. 60 Hz, 8000/277 V transformer has the following impedances referred to the high voltage side: Req-320, xe,-45Ω,R.-250kQ,Xm-30kQ. A) Calculate the voltage across rated load impedance with PF= 0.707 lagging when the transformer is connected to rated input voltage. B) Draw the phasor diagram showing the load voltage and current, voltage drop across the series impedance and voltage at the low voltage side of the ideal transformer, C) Calculate the efficiency of the transformer D) What adjustments...
please solve it clearly
A 1000-VA, 230/115-V has the following equivalent circuit parameters Referred to high voltage side Referred to low voltage side Req=0.503 Ohm Rc=3383 Ohm Xeq=1.905 Ohm XM=1099 Ohm (Find the expected values for the open and short circuit tests and fill the following table (show all steps Short Circuit test (High voltage side) =VSC - Isc-rated current Pse Open Circuit test (Low voltage side) -Voc -Ioc Poc Then .a) Find the equivalent circuit of this transformer referred...
A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which is connected to the 240-volt secondary winding, absorbs 80 kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: a) primary voltage. b) load impedance. c) load impedance referred to the primary. d) the real and reactive power supplied to the primary winding
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