A transformer with three single phases having the values of 10kVA, 60Hz, and 460/120V are connected...
A transformer with three single phases having the values of 10kVA, 60Hz, and 460/120V are connected to form a transformer bank of 460/208V. EACH transformer has an equivalent impedance of 1.0+j2.0 Ohms when referred to the high side. The transformer bank supplies 20kW at 0.8 pf lagging at rated voltage 208V.
What is the voltage regulation of the transformer bank? Solve with real OR per-unit values.
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A transformer with three single phases having the values of
10kVA, 60Hz, and 460/120V are connected...
3. Three single-phase, 10 kVA, 460/120 V, 60 Hz transformers are connected to form a three-phase...
3. Three single-phase, 10 kVA, 460/120 V, 60 Hz transformers are connected to form a three-phase 460/208 V transformer bank. The equivalent impedance of each transformer referred to HV side is 1.0 + j2.0 Ω. The transformer delivers 25 kW at 0.9 pf lagging at rated voltage. Answer the following questions: (a) Draw a schematic diagram showing the transformer connection. Draw three separate single-phase transformers and complete their primary and secondary connections. (b) Determine the magnitude of transformer primary and...
A single-phase transformer of nominal values of 10kVA, 440/220 V and 60 Hz supplies nominal load...
A single-phase transformer of nominal values of 10kVA, 440/220 V and 60 Hz supplies nominal load at a power factor of 0.85 lagging connected to the side of low voltage. The load operates at a nominal voltage and the transformer has the following parameters: R=0.160, X,=0.48 , R=0.040, X=0.12, R900, Xy=1300. Determine: 1. The voltage regulation of the transformer. 2. The efficiency of the transformer.
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...
Solvein pu sysvem 2-10. A 13,800/480 V three-phase Y-A-connected transformer bank consists of thr...
please solve the question in pu sysyem !!!!
Solvein pu sysvem 2-10. A 13,800/480 V three-phase Y-A-connected transformer bank consists of three identical 100-kVA 967/480-V transformers. I is supplied with power directly from a large constant-voltage bus. In the short-circuit test, the recorded values on the high-voltage side for one of these transformers are Isc 12.6 A Pc3300 w (a) If this bank delivers a rated load at 0.85 PF lagging and rated voltage, what is the line-to-line voltage on...
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...
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...
2. The transformer is loaded: 15 KW load, 0.9 lagging PF, and Vs=450 V. a) Find...
2. The transformer is loaded: 15 KW load, 0.9 lagging PF, and
Vs=450 V.
a) Find the voltage at the high-voltage side of the
transformer (Vp).
b) Find the Voltage Regulation and the Efficiency of this
transformer under this load.
Page 2 of
Problem 3 The equivalent circuit of a 22KVA, 11700/450 V, 60Hz, single phase transformer when referred to its low-voltage side is considered in this problem. The transformer is connected to a load. 0.225+j1.12 's ROXO + Up...
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...
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...
Problem 1 | (30 points) followery A test 10,000 VA 115/230v transformer has the data Short-cacuit...
Problem 1 | (30 points) followery A test 10,000 VA 115/230v transformer has the data Short-cacuit 1 Open Current test Vse av Isc=104 Pse = 40 W Voc= 1151 Ioc=0.54 Poc=10w a) Find the equivalent carunt referred to the high voltage side 6) find the equivalent circut referred to the low voltage side Assume Shag = 10KVA and Voace = 230v on high Voltage side Find the equise bhut cjuit in per-unit 1) Using per-unit circuits fröd the wolting regulation...
A single-phase transformer of nominal values of 10kVA, 440/220 V and 60 Hz supplies nominal load at a power factor of 0.85 lagging connected to the side of low voltage. The load operates at a nominal voltage and the transformer has the following parameters: R=0.160, X,=0.48 , R=0.040, X=0.12, R900, Xy=1300. Determine: 1. The voltage regulation of the transformer. 2. The efficiency of the transformer.
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...
please solve the question in pu sysyem !!!!
Solvein pu sysvem 2-10. A 13,800/480 V three-phase Y-A-connected transformer bank consists of three identical 100-kVA 967/480-V transformers. I is supplied with power directly from a large constant-voltage bus. In the short-circuit test, the recorded values on the high-voltage side for one of these transformers are Isc 12.6 A Pc3300 w (a) If this bank delivers a rated load at 0.85 PF lagging and rated voltage, what is the line-to-line voltage on...
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...
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...
2. The transformer is loaded: 15 KW load, 0.9 lagging PF, and
Vs=450 V.
a) Find the voltage at the high-voltage side of the
transformer (Vp).
b) Find the Voltage Regulation and the Efficiency of this
transformer under this load.
Page 2 of
Problem 3 The equivalent circuit of a 22KVA, 11700/450 V, 60Hz, single phase transformer when referred to its low-voltage side is considered in this problem. The transformer is connected to a load. 0.225+j1.12 's ROXO + Up...
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...
Problem 1 | (30 points) followery A test 10,000 VA 115/230v transformer has the data Short-cacuit 1 Open Current test Vse av Isc=104 Pse = 40 W Voc= 1151 Ioc=0.54 Poc=10w a) Find the equivalent carunt referred to the high voltage side 6) find the equivalent circut referred to the low voltage side Assume Shag = 10KVA and Voace = 230v on high Voltage side Find the equise bhut cjuit in per-unit 1) Using per-unit circuits fröd the wolting regulation...
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