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Electric Machinery
Problem 2: [50 points] A 15-KVA, 230/2300-V transformer is considered. The following test data...
The following data was obtained when open circuit and short circuit tests were performed on a...
The following data was obtained when open circuit and short circuit tests were performed on a single phase, 50 KVA, 2,400:240 V, 60 Hz distribution transformer: With high voltage winding open circuited: Voc = 240 V, Ioc = 4.85 A, Poc = 173 W With low voltage winding short circuited: Vsc = 52 V, Isc = 20.8 A, Psc = 650 W a) Determine the equivalent circuit of the transformer referred to its high voltage side and to its low...
A 2.2KVA 600/120 V, transformer has the following data for its OC test and SC test:...
A 2.2KVA 600/120 V, transformer has the following data for its OC test and SC test: OC Test: Voc: 120V Ioc: 0.6A Poc: 16W SC Test Vsc = 12V Isc = 3.67A Psc= 30W (a) Find the equivalent circuit referred to its HV and LV side. (b) If it operating as a step-down transformer, and delivering its rated current at the rated voltage and 0.85 pf lagging, find what will be the input voltage. (c) Find the Voltage regulation of...
Choose the base power as 50-KVA, the primary base voltage as 2400-V, the secondary voltage as...
Choose the base power as 50-KVA, the primary base voltage as 2400-V, the secondary voltage as 240-V: (a) Calculate and sketch the transformer equivalent circuit in per unit values' (b) The transformer is carrying rate load of 1.0 pu at.8 power factor lagging. Calculate the primary voltage in per unit. (c) Calculate the efficiency of the transformer at this load. A 50-KVA 2400/240-V, 60-Hz distribution transformer is tested with the following results: Open circuit Test Short Circuit Test Voc =...
Question 31 (17 points) 120/120 single-phase transformer. Calculate the values for the equivalent circuit for the single-phase transformer for the given short and open circuit test shown below. (2 po...
Question 31 (17 points) 120/120 single-phase transformer. Calculate the values for the equivalent circuit for the single-phase transformer for the given short and open circuit test shown below. (2 points) Draw the equivalent circuit. (1 point each) Find Ssc, QSC, Soc, Qoc, R1, R2, XI, X2, Rc, Xm, PFsc, PFoc, (esc θ。c) phase angel between V and I. What is the power rating of this transformer? Short circuit test (performed at High Voltage side) Vsc 16.20V rms, Isc 5.00 A...
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 1000-VA 230/115-V transformer has been tested to determine its equivalent circuit. The results of the...
A 1000-VA 230/115-V transformer has been tested to determine its equivalent circuit. The results of the tests are shown below Open-circuit test Voc= 230 V loc= 0.45 A Poc 30 W Short-circuit test Vsc= 19.1 V lsc=8.7 A Psc= 42.3 W All data given were taken from the primary side of the transformer. Determine all the transformer parameters shown in Fig. 3. jXM Ns V. Ideal transformer Fig. 3
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...
A 1200 kVA, 11/3.3 kV, 50-Hz, three phase Dyn 11 transformer is subjected to both the...
A 1200 kVA, 11/3.3 kV, 50-Hz, three phase Dyn 11 transformer is subjected to both the open, and short circuit tests, yielding the following results: OPEN CIRCUIT TEST SHORT CIRCUIT TEST Vsupply = 3.3 kV Vsupply = 650 V Io = 7.3 A Isc = 54.4A Po = 6.71 kW Psc = 8.89 kW Determine: 1.1 The no load current per phase, in RECTANGULAR form, referred to the H.V. side. (5) 1.2 How would you know, without being told, that...
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...
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...
Choose the base power as 50-KVA, the primary base voltage as 2400-V, the secondary voltage as 240-V: (a) Calculate and sketch the transformer equivalent circuit in per unit values' (b) The transformer is carrying rate load of 1.0 pu at.8 power factor lagging. Calculate the primary voltage in per unit. (c) Calculate the efficiency of the transformer at this load. A 50-KVA 2400/240-V, 60-Hz distribution transformer is tested with the following results: Open circuit Test Short Circuit Test Voc =...
Question 31 (17 points) 120/120 single-phase transformer. Calculate the values for the equivalent circuit for the single-phase transformer for the given short and open circuit test shown below. (2 points) Draw the equivalent circuit. (1 point each) Find Ssc, QSC, Soc, Qoc, R1, R2, XI, X2, Rc, Xm, PFsc, PFoc, (esc θ。c) phase angel between V and I. What is the power rating of this transformer? Short circuit test (performed at High Voltage side) Vsc 16.20V rms, Isc 5.00 A...
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 1000-VA 230/115-V transformer has been tested to determine its equivalent circuit. The results of the tests are shown below Open-circuit test Voc= 230 V loc= 0.45 A Poc 30 W Short-circuit test Vsc= 19.1 V lsc=8.7 A Psc= 42.3 W All data given were taken from the primary side of the transformer. Determine all the transformer parameters shown in Fig. 3. jXM Ns V. Ideal transformer Fig. 3
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...
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...
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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