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A single-phase transformer of nominal values of 10kVA, 440/220 V and 60 Hz supplies nominal load...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting thre...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting three single phase transformers in the Dynll vector group as shown in Fig.P1. The per phase equivalent circuit parameters on the high voltage side are: R1-0.72 Ω, Xi,-0.92 Ω, R2-0.70 Ω, Xp-0.90 Ω, R.-308.49 Ω, and X,,-44.61 Ω (a) Sketch the corresponding phasor diagram of the primary and secondary voltages for the Dynll vector group; lagging; terminal voltage is 415 V line to line, and...
can you calculate this question and explain why? thanks 1. A 250-kVA, 11000/2200-V, 50-Hz, single-phase transformer...
can you calculate this question and explain why?
thanks
1. A 250-kVA, 11000/2200-V, 50-Hz, single-phase transformer has the following parameters: RI 1.3 , R2 0.05 , Rel 193 k2, X1 4.5 Q X2 0.16 2 I,- 80 kQ Xml (a) Draw the approximate equivalent circuit of the transformer showing all the circuit parameters referred to the low-voltage side. Use the approximate equivalent circuit to calculate the input voltage and voltage regulation of the transformer when it delivers full load at...
3 phase, 37.3 Kw, 440 V, 50 Hz induction motor operates at full load with efficiency...
3 phase, 37.3 Kw, 440 V, 50 Hz induction motor operates at full load with efficiency 89% and power factor 0.85 lagging. Calculate: A) The total KVA rating of capacitor required to rise full load power factor to 0.95 lagging. B) What is capacitance per phase if capacitor: 1) Delta connected. 2) Star connected.
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,...
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...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA at 0.8 p.f. lagging Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA...
A single-phase transformer has the following data: 10 kVA, 2200/220 V, 60 Hz and its circuit...
A single-phase transformer has the following data: 10 kVA, 2200/220 V, 60 Hz and its circuit parameters are as follows: L1 = 23.75 H, L2 = 0.2375 H, R1 = 5.2 Ω, R2 = 0.052 Ω, M = 2.37 H. The transformer was connected to the supply of rated voltage. Write the voltage equations,
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 Ohm/km, x = 0.88 Ohm/km, y = 4.1 * 10^-6 s/km. Calculate the ABCD constants of this transmission line. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? What is the voltage regulation of the transmission line for the conditions in question 11. What is the efficiency of the...
A single-phase 10 kVA, 460/120 V, 60 Hz, transformer has an efficiency of 96% when it...
A single-phase 10 kVA, 460/120 V, 60 Hz, transformer has an efficiency of 96% when it delivers 9 kW at 0.9 pf lagging. The transformer is connected as an autotransformer to supply load to a 460 V circuit from a 580 V source. Show the autotransformer connection Determine kVA rating of the autotransformer Determine the efficiency of the autotransformer at full-load with 0.9 pf lagging
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 ohm/km, x = 0.88 ohm/km, y = 4.1 * 10^-6 S/km. 10. Calculate the ABCD constants of this transmission line. 11. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? 12. What is the voltage regulation of the transmission line for the conditions in question 11. 13. What is...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting three single phase transformers in the Dynll vector group as shown in Fig.P1. The per phase equivalent circuit parameters on the high voltage side are: R1-0.72 Ω, Xi,-0.92 Ω, R2-0.70 Ω, Xp-0.90 Ω, R.-308.49 Ω, and X,,-44.61 Ω (a) Sketch the corresponding phasor diagram of the primary and secondary voltages for the Dynll vector group; lagging; terminal voltage is 415 V line to line, and...
can you calculate this question and explain why?
thanks
1. A 250-kVA, 11000/2200-V, 50-Hz, single-phase transformer has the following parameters: RI 1.3 , R2 0.05 , Rel 193 k2, X1 4.5 Q X2 0.16 2 I,- 80 kQ Xml (a) Draw the approximate equivalent circuit of the transformer showing all the circuit parameters referred to the low-voltage side. Use the approximate equivalent circuit to calculate the input voltage and voltage regulation of the transformer when it delivers full load at...
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,...
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...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA at 0.8 p.f. lagging Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 Ohm/km, x = 0.88 Ohm/km, y = 4.1 * 10^-6 s/km. Calculate the ABCD constants of this transmission line. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? What is the voltage regulation of the transmission line for the conditions in question 11. What is the efficiency of the...
A 220-kV, 150 MVA, 60-Hz, three-phase transmission line is 140 km long with the characteristic parameters of r = 0.09 ohm/km, x = 0.88 ohm/km, y = 4.1 * 10^-6 S/km. 10. Calculate the ABCD constants of this transmission line. 11. What is the sending end voltage if the line is supplying rated voltage and apparent power at 0.85 PF lagging? 12. What is the voltage regulation of the transmission line for the conditions in question 11. 13. What is...
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