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13. The parameters of the equivalents circuit of a 150 kVA, 2400/240 V transformer are: Ri-...
Problem (1): A 15-KVA, 2400:240-V, 60 Hz transformer has the following equivalent circuit parameters: R =...
Problem (1): A 15-KVA, 2400:240-V, 60 Hz transformer has the following equivalent circuit parameters: R = 2.522 R2 = 0.02522 Xi = 722 X = 0.0712 Re = 32 kl Xm = 11.5 k12 If the transformer is supplying a 10-kW, 0.8 PF lagging load at rated voltage, assuming the output voltage is the reference, draw the transformer's exact equivalent circuit referred to the primary (H.V) side and use it to calculate: 1. The input current 2. The input voltage...
lI. A single-phase 100 KVA, 2000/200 V transformer has the following test results Open-circuit (OC) test (LV side): 200 V, 8,0 A, 600 W Short-Circuit (SC) test (HV side): 100 V,50 A, 2000 W a. De...
lI. A single-phase 100 KVA, 2000/200 V transformer has the following test results Open-circuit (OC) test (LV side): 200 V, 8,0 A, 600 W Short-Circuit (SC) test (HV side): 100 V,50 A, 2000 W a. Determine the approximate equivalent circuit referred to the HV side. b. Find the voltage regulation at full-rated current delivering rated voltage and PF of 0.8 lagging. c. Calculate efficiency of transformer d. Assume that, voltage at HV side is 2000 V. Calculate the voltage at...
3.10 A 240/120 V, 4.8 kVA, 60 Hz, single-phase transformer is used to supply a 4.8...
3.10 A 240/120 V, 4.8 kVA, 60 Hz, single-phase transformer is used to supply a 4.8 kVA resistive load (i.e., the load has a power factor of 1.0) at rated voltage of 120 V a) If you assume the transformer is ideal, what would be the magni- tude of the expected primary side (240 V side) current? b) Again, if you assume the transformer is ideal, what is the apparent impedance of the load viewed from the high-voltage side of...
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...
Problem 1 A 60Hz transformer is rated 30 (kVA), 4000(V)/120(V). The open circuit test, with the...
Problem 1 A 60Hz transformer is rated 30 (kVA), 4000(V)/120(V). The open circuit test, with the high voltage side open, gives Po= 100 (W), loc = 1.1455 (A). The short circuit test, measured with the low voltage side shorted, gives Pse = 180 (W), Vse = 129.79 (V). a) Determine the equivalent circuit for the transformer (both open and short circuit) b) Calculate the circuit components. (Req, Xeq, Rc, Xm)
Electric Machines Problem 1 (40 points) The following data were obtained for a 20 kVA,60 H...
Electric Machines
Problem 1 (40 points) The following data were obtained for a 20 kVA,60 H z, 2400/240 V distribution transformer tested at 60 Hz: HV open circuited: Voc 240 V, loc 1.038 A, Poc 122 W LV short circuited: Vc 61.3 V,Is8.33 A, Pc 257 W 1) Find the parameters of the transformer and equivalent circuit referred to LV side 2) Find voltage regulation when the transformer oper ates as step down and delivers its rated kVA at rated...
Question 2 A single-phase transformer has the following nameplate ratings: 100 kVA, 7200/240 V and 60...
Question 2 A single-phase transformer has the following nameplate ratings: 100 kVA, 7200/240 V and 60 Hz. The following results are obtained from open-circuit and short-circuit tests: Test Open-circuit Short-circuit Voltage 7200 V 250 V Current 0.65 A 13.89 A Real Power Input 425 W 1420 W a) Determine the parameters of this transformer, all referred to the primary side. b) The secondary of this transformer is connected to a load that draws 100% of the rated power at rated...
2) A 50kVA, 2400/240V single phase transformer has the test measurements: (20) Open circuit test: 240V,...
2) A 50kVA, 2400/240V single phase transformer has the test measurements: (20) Open circuit test: 240V, 5.0A, 450W (HV open) Short circuit test: 55V, 20.8A, 600W (LV short) a Caleulate the transformer equivalent circuit parameters and draw the transformer equivalent circuit. b) Find the voltage regulation and efficiency when the transformer is connected to a load that is 75% of the rated load current at 0.8 pf lagging. c) Find the voltage regulation and efficiency when the transformer is full...
JUST PART E VOLTAGE REGULATION PLEASE!! 2) The series impedance referred to the HV side of...
JUST PART E VOLTAGE REGULATION PLEASE!!
2) The series impedance referred to the HV side of a 30 kVA, 8800/220 V distribution transformer is Zeq = 20 + j80 N. The components of the excitation branch referred to the HV side are Rc = 200 kN and XM = 20 kN. Suppose the transformer is supplying the load connected to the LV winding with the rated apparent power and the rated voltage (220 V) at a 0.8 lagging P.F. Use...
Q2: A single-phase 10 KVA, 2400/240 V, 50 Hz transformer used in distribution network has the...
Q2: A single-phase 10 KVA, 2400/240 V, 50 Hz transformer used in distribution network has the following wattmeter reading: (10 X 3 = 30 Marks) Open-circuit Test wattmeter reading: 100 W (at rated voltage) Short-circuit Test wattmeter reading: 60 W (test conducted at 50% load condition) (a) Calculate the efficiency of the transformer when it delivers full load at 0.8 pflagging. (b) Calculate the output when transformer operating at maximum efficiency and also calculate the maximum efficiency. (c) Load on...
Problem (1): A 15-KVA, 2400:240-V, 60 Hz transformer has the following equivalent circuit parameters: R = 2.522 R2 = 0.02522 Xi = 722 X = 0.0712 Re = 32 kl Xm = 11.5 k12 If the transformer is supplying a 10-kW, 0.8 PF lagging load at rated voltage, assuming the output voltage is the reference, draw the transformer's exact equivalent circuit referred to the primary (H.V) side and use it to calculate: 1. The input current 2. The input voltage...
lI. A single-phase 100 KVA, 2000/200 V transformer has the following test results Open-circuit (OC) test (LV side): 200 V, 8,0 A, 600 W Short-Circuit (SC) test (HV side): 100 V,50 A, 2000 W a. Determine the approximate equivalent circuit referred to the HV side. b. Find the voltage regulation at full-rated current delivering rated voltage and PF of 0.8 lagging. c. Calculate efficiency of transformer d. Assume that, voltage at HV side is 2000 V. Calculate the voltage at...
3.10 A 240/120 V, 4.8 kVA, 60 Hz, single-phase transformer is used to supply a 4.8 kVA resistive load (i.e., the load has a power factor of 1.0) at rated voltage of 120 V a) If you assume the transformer is ideal, what would be the magni- tude of the expected primary side (240 V side) current? b) Again, if you assume the transformer is ideal, what is the apparent impedance of the load viewed from the high-voltage side of...
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...
Problem 1 A 60Hz transformer is rated 30 (kVA), 4000(V)/120(V). The open circuit test, with the high voltage side open, gives Po= 100 (W), loc = 1.1455 (A). The short circuit test, measured with the low voltage side shorted, gives Pse = 180 (W), Vse = 129.79 (V). a) Determine the equivalent circuit for the transformer (both open and short circuit) b) Calculate the circuit components. (Req, Xeq, Rc, Xm)
Electric Machines
Problem 1 (40 points) The following data were obtained for a 20 kVA,60 H z, 2400/240 V distribution transformer tested at 60 Hz: HV open circuited: Voc 240 V, loc 1.038 A, Poc 122 W LV short circuited: Vc 61.3 V,Is8.33 A, Pc 257 W 1) Find the parameters of the transformer and equivalent circuit referred to LV side 2) Find voltage regulation when the transformer oper ates as step down and delivers its rated kVA at rated...
Question 2 A single-phase transformer has the following nameplate ratings: 100 kVA, 7200/240 V and 60 Hz. The following results are obtained from open-circuit and short-circuit tests: Test Open-circuit Short-circuit Voltage 7200 V 250 V Current 0.65 A 13.89 A Real Power Input 425 W 1420 W a) Determine the parameters of this transformer, all referred to the primary side. b) The secondary of this transformer is connected to a load that draws 100% of the rated power at rated...
2) A 50kVA, 2400/240V single phase transformer has the test measurements: (20) Open circuit test: 240V, 5.0A, 450W (HV open) Short circuit test: 55V, 20.8A, 600W (LV short) a Caleulate the transformer equivalent circuit parameters and draw the transformer equivalent circuit. b) Find the voltage regulation and efficiency when the transformer is connected to a load that is 75% of the rated load current at 0.8 pf lagging. c) Find the voltage regulation and efficiency when the transformer is full...
JUST PART E VOLTAGE REGULATION PLEASE!!
2) The series impedance referred to the HV side of a 30 kVA, 8800/220 V distribution transformer is Zeq = 20 + j80 N. The components of the excitation branch referred to the HV side are Rc = 200 kN and XM = 20 kN. Suppose the transformer is supplying the load connected to the LV winding with the rated apparent power and the rated voltage (220 V) at a 0.8 lagging P.F. Use...
Q2: A single-phase 10 KVA, 2400/240 V, 50 Hz transformer used in distribution network has the following wattmeter reading: (10 X 3 = 30 Marks) Open-circuit Test wattmeter reading: 100 W (at rated voltage) Short-circuit Test wattmeter reading: 60 W (test conducted at 50% load condition) (a) Calculate the efficiency of the transformer when it delivers full load at 0.8 pflagging. (b) Calculate the output when transformer operating at maximum efficiency and also calculate the maximum efficiency. (c) Load on...
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