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o, Mc Pildly WINUM on the same leg of the iron-core. Question 13: Which of the...
4-9 Question Completion Status: QUESTION 4 A three phase delta source is connected to a three...
4-9
Question Completion Status: QUESTION 4 A three phase delta source is connected to a three phase transformer. The primary of the transformer is connected in a delta configuration The line voltage on the primary is 240V. The turns ratio is 2:1. The secondary of the transformer is connected in a wye configuration. A wye connected load is attached to the secondary of the transformer. Each of the three load resistors has a resistance of 10 ohms. What is the...
The primary of an ideal iron-core transformer with a 10:1 (primary:secondary) turns ratio is connected to...
The primary of an ideal iron-core transformer with a 10:1 (primary:secondary) turns ratio is connected to an ideal sinusoidal voltage source whose rms phasor is a real number Vi. The secondary is connected to a load impedance of 3 + 2j Ohms. a) Find the rms phasor for the current flowing through the primary.. b) Find the maximum instantaneous current flowing through the primary.
A delta-wye connected transformer is shown in Figure below. This is a 220 kV to 450...
A delta-wye connected transformer is shown in Figure below. This is a 220 kV to 450 kV transformer, line-line, RMS. The 'X' side is the 220 kV side. Assume that Phase A voltage on the X' side has zero phase angle (that is, use VaX as the phase reference) 1) What is the turns ratio NX: NH? 2) Draw phasor diagrams of the primary and secondary voltages. Be sure to get relative phase angles right. 3) If a balanced load...
help me please please answer many as possible 10. The hysteresis loss in the core of a transformer can be reduced by A. increasing the frequency of the aliemating current, B. using a solid iro...
help me please
please answer many as possible
10. The hysteresis loss in the core of a transformer can be reduced by A. increasing the frequency of the aliemating current, B. using a solid iron core. C. using grain-oriented-steel D, reducing the connected load. 11. In Fig. 1(b) in the text, the phasor I, It is the resultant of the A. exciting and the magnetizing current. B. active and the reactive secondary current. C. primary and the exciting current. D....
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...
QUESTION 3 A 200 - MVA, 15/200 kV single-phase power transformer has a per – unit...
QUESTION 3 A 200 - MVA, 15/200 kV single-phase power transformer has a per – unit resistance of 1.2 percent and a per-unit reactance of 5 percent (data taken from the transformer's nameplate). The magnetizing impedance is impedance is j80 per unit. a. Find the equivalent circuit referred to the low-voltage side of this transformer. b. Calculate the voltage regulation of this transformer for a full-load current at power factor of 0.8 lagging. c. Assume that the primary voltage of...
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...
d) Consider an ideal, single-phase 2400V-240V transformer. The primary is connected to a 2200V source and...
d) Consider an ideal, single-phase 2400V-240V transformer. The
primary is connected to a 2200V source and the secondary is
connected to an impedance of 2Ω ∠36.9o , find all the values in
Table 1.
Table 1
No
Parameters
1
The secondary output current and voltage.
2
The primary input current
3
The load impedance as seen from the primary side.
4
The input and output apparent power
5
The output power factor
e) A 30MVA 33/11 kV star-delta three phase...
SHORT ANSWER Weite the T imeter 200 cant iron core re-10x 102 1- 2A Figare 123...
SHORT ANSWER Weite the T imeter 200 cant iron core re-10x 102 1- 2A Figare 123 12) See Figure 12.5, A flux of s 10-5 Wh exists in this magnetic ciecult, permeability of ai 12) is 4π· 10-7 wb/A-n, what is the magretning force of ee air gap? MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question. 13) Which of the terms below describes the ratio of the number of tums of the primary...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
4-9
Question Completion Status: QUESTION 4 A three phase delta source is connected to a three phase transformer. The primary of the transformer is connected in a delta configuration The line voltage on the primary is 240V. The turns ratio is 2:1. The secondary of the transformer is connected in a wye configuration. A wye connected load is attached to the secondary of the transformer. Each of the three load resistors has a resistance of 10 ohms. What is the...
A delta-wye connected transformer is shown in Figure below. This is a 220 kV to 450 kV transformer, line-line, RMS. The 'X' side is the 220 kV side. Assume that Phase A voltage on the X' side has zero phase angle (that is, use VaX as the phase reference) 1) What is the turns ratio NX: NH? 2) Draw phasor diagrams of the primary and secondary voltages. Be sure to get relative phase angles right. 3) If a balanced load...
help me please
please answer many as possible
10. The hysteresis loss in the core of a transformer can be reduced by A. increasing the frequency of the aliemating current, B. using a solid iron core. C. using grain-oriented-steel D, reducing the connected load. 11. In Fig. 1(b) in the text, the phasor I, It is the resultant of the A. exciting and the magnetizing current. B. active and the reactive secondary current. C. primary and the exciting current. D....
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...
QUESTION 3 A 200 - MVA, 15/200 kV single-phase power transformer has a per – unit resistance of 1.2 percent and a per-unit reactance of 5 percent (data taken from the transformer's nameplate). The magnetizing impedance is impedance is j80 per unit. a. Find the equivalent circuit referred to the low-voltage side of this transformer. b. Calculate the voltage regulation of this transformer for a full-load current at power factor of 0.8 lagging. c. Assume that the primary voltage of...
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...
d) Consider an ideal, single-phase 2400V-240V transformer. The
primary is connected to a 2200V source and the secondary is
connected to an impedance of 2Ω ∠36.9o , find all the values in
Table 1.
Table 1
No
Parameters
1
The secondary output current and voltage.
2
The primary input current
3
The load impedance as seen from the primary side.
4
The input and output apparent power
5
The output power factor
e) A 30MVA 33/11 kV star-delta three phase...
SHORT ANSWER Weite the T imeter 200 cant iron core re-10x 102 1- 2A Figare 123 12) See Figure 12.5, A flux of s 10-5 Wh exists in this magnetic ciecult, permeability of ai 12) is 4π· 10-7 wb/A-n, what is the magretning force of ee air gap? MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question. 13) Which of the terms below describes the ratio of the number of tums of the primary...
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