A 75 kva, 230v/115v, 60hz transformer was tested with the following results: short circuit test:9.5v,326A,1200w, open...
A 75 kva, 230v/115v, 60hz transformer was tested with the following results: short circuit test:9.5v,326A,1200w, open circuit test:115v,16.3A,750w. Determine the percent voltage regulation at rated load 0.8 lagging?
a)3.1%
b)3.6%
c)3.4%
d)2.8%
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A 75 kva, 230v/115v, 60hz transformer was tested with
the following results: short circuit test:9.5v,326A,1200w, open...
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...
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...
Question-2) A single phase 100 kVA, 100/1000 V transformer has the following results from the open-...
Question-2) A single phase 100 kVA, 100/1000 V transformer has the following results from the open- circuit and short-circuit tests. Open circuit Short Circuit Voltage 100V 50V Current 6A 100A Power 400W 1800W (a) Determine the rated parameters for the high voltage and low voltage sides. (b) Determine the circuit parameters and draw the equivalent circuit referred to the High Voltage side. (©) Determine the voltage regulation for a 0.8 power factor lagging at full load.
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)
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...
single phase transformer with open circuit test and short circuit test
A 20 kVA, 12,000/380 V, single-phase transformer has the following test results:open circuit (low voltage side): V = 380, I = 2, P = 250short circuit (high voltage side): V = 200, I = 2.5, P = 250a)Determine the approximate equivalent circuit parameters of the transformer in per-unit values.b) the transformer is working at 80% full load with 0.85 power factor lagging. what is the secondary current at this working condition in both actual and per-unit values.
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...
The following readings were taken during an open-circuit test and short-circuit test on a three-phase, 10...
The following readings were taken during an open-circuit test and short-circuit test on a three-phase, 10 MVA, 13.8 kV, 50 Hz synchronous generator driven at rated speed. Open Circuit Test Field Current 150 A 180 A 200 A 250 A 300 A 350 A Line voltage 11.2 kV 12.0 kV 12.5 kV 13.5 kV 14.3 kV 14.8 kV Short Circuit Test Field Current 150 A 180 A Short Circuit Current 400 A 480 A a) Plot the open-circuit and short-circuit...
A 200 kVA, 7200/600 V, 60 Hz transformer is operating at rated load and 0.9 p.f....
A 200 kVA, 7200/600 V, 60 Hz transformer is operating at rated
load and 0.9 p.f. lagging. The core loss, winding resistances and
leakage reactances, expressed in per unit are 0.0056, 0.0133 and
0.0557 respectively. Determine: a) The efficiency. b) The voltage
regulation. c) The efficiency and regulation at 0.3 load and 0.8
p.f. lagging.
A 200 kVA, 7200/600 V, 60 Hz transformer is operating at rated load and 0.9 p.f. lagging. The core loss, winding resistances and leakage reactances,...
4. Figure shows a power source that feeds a 100 kVA 14/2.4 kV transformer through a...
4. Figure shows a power source that feeds a 100 kVA 14/2.4 kV transformer through a feeder with impedance of 100/60° Ω Load 90 kw 0.85 PF lagging Feeder transmission line) Source Transformer Load The transformer has been tested to determine its equivalent circuit. The results of the tests are: Open-circuit test Voc = 14 kV oc 0.1 A Рос-800 w Short-circuit test Vsc 800 V Isc = 7A Psc 2 kW The load on the transformer is 90 kW...
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...
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...
Question-2) A single phase 100 kVA, 100/1000 V transformer has the following results from the open- circuit and short-circuit tests. Open circuit Short Circuit Voltage 100V 50V Current 6A 100A Power 400W 1800W (a) Determine the rated parameters for the high voltage and low voltage sides. (b) Determine the circuit parameters and draw the equivalent circuit referred to the High Voltage side. (©) Determine the voltage regulation for a 0.8 power factor lagging at full load.
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)
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...
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...
A 200 kVA, 7200/600 V, 60 Hz transformer is operating at rated
load and 0.9 p.f. lagging. The core loss, winding resistances and
leakage reactances, expressed in per unit are 0.0056, 0.0133 and
0.0557 respectively. Determine: a) The efficiency. b) The voltage
regulation. c) The efficiency and regulation at 0.3 load and 0.8
p.f. lagging.
A 200 kVA, 7200/600 V, 60 Hz transformer is operating at rated load and 0.9 p.f. lagging. The core loss, winding resistances and leakage reactances,...
4. Figure shows a power source that feeds a 100 kVA 14/2.4 kV transformer through a feeder with impedance of 100/60° Ω Load 90 kw 0.85 PF lagging Feeder transmission line) Source Transformer Load The transformer has been tested to determine its equivalent circuit. The results of the tests are: Open-circuit test Voc = 14 kV oc 0.1 A Рос-800 w Short-circuit test Vsc 800 V Isc = 7A Psc 2 kW The load on the transformer is 90 kW...
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