A generator has a terminal voltage 480V at no load. At full load, the terminal voltage...
A generator has a terminal voltage 480V at no load. At full load, the terminal voltage drops to 466V. What is the voltage regulation of the generator in (%)?
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A generator has a terminal voltage 480V at no load. At full
load, the terminal voltage...
A 3-phase 480V, 4-pole, 60Hz, Delta- connected synchronous generator with the OCC shown here has an armature resistance of RA-0015Ω and 400 synchronous reactance ofX, 0.1.2. At full load, the mac...
A 3-phase 480V, 4-pole, 60Hz, Delta- connected synchronous generator with the OCC shown here has an armature resistance of RA-0015Ω and 400 synchronous reactance ofX, 0.1.2. At full load, the machine supplies 1200A at 0.8PF lagging. Under full-load conditions, the friction and windage losses are 40kW, and the core losses are 30kW. Ignore field 300 200 circuit losses. a) If the generator is operated at full load, how much field current is required to keep the terminal 100 voltage constant...
A 480-V, 50-Hz, Y-connected, 6-pole synchronous generator has a synchronous reactance of 1 Ohm. Its full...
A 480-V, 50-Hz, Y-connected, 6-pole synchronous generator has a synchronous reactance of 1 Ohm. Its full load armature current is 60 A at 0.8 pf lagging. Under full load conditions, the friction and windage losses are 1.5 kW, and core losses are 1 kW at 50 Hz. Ignore armature copper losses. The field has been adjusted so that the terminal voltage is 480 V at no load. a.What is the speed of rotation of this gen? b.What is the generator...
e. A three phase generator turning at 1500 rpm has a terminal voltage of 15 kV,...
e. A three phase generator turning at 1500 rpm has a terminal voltage of 15 kV, 50 Hz. If the synchronous reactance is 5 per phase, calculate the generated voltage if the following are connected to its terminals: i. Resistive load is 12 MW (5 marks) ii. Inductive load is 12 MVAR (5 marks) iii. Capacitive load is 12 MVAR. (5 marks) f. How will the generated voltage be affected in each of the case (a), (b) & (c) above?...
a single phase transformer is rated for 0.5kVa, a primary voltage of 480V, and a secondary...
a single phase transformer is rated for 0.5kVa, a primary voltage of 480V, and a secondary voltage of 120V. what is the maximum full load that can be supplied by the secondary?
A 3 KVA load is operating at a terminal voltage ? = 380 < 0° ?....
A 3 KVA load is operating at a terminal voltage ? = 380 < 0° ?. It is supplied from a synchronous generator whose synchronous impedance ?? = .5+? 1.5 Ω . Calculate the excitation voltage ?? of the generator, and the armature current ??, if the load is operating at .71 pf lagging. Also draw the phasor diagram corresponding to the question
A second separately excited DC generator has the same electrical parameters as the generator in part...
A second separately excited DC generator has the same electrical
parameters as the generator in part (a) first but does not have
compensating windings. The full-load demagnetising armature
reaction is equivalent to 500 Ampere-turns. (i) With Radj = 63Ω and
the generator is driven at 1600rpm, what is the no-load terminal
voltage? (ii) What would be the output terminal voltage if 364A
were drawn from the armature at 1600rpm?
Q2. (a) Fig. Q20) shows a separately excited DC generator with...
LAB MANUAL LAB EXPERIMENT - 04: LOAD CHARACTERISTICS OF SEPARATELY EXCITED DC GE ATELY EXCITED DC...
LAB MANUAL LAB EXPERIMENT - 04: LOAD CHARACTERISTICS OF SEPARATELY EXCITED DC GE ATELY EXCITED DC GENERATOR REVIEW QUESTIONS: 1. A separately excited generator has constant: a Field Strength b Load Current c Terminal Voltage The terminal voltage of a separately-excited generator a Goes up as load increases b Goes down as load increases C Stays the same as load increases. 3. The current drawn from a separately-excited generator by the load a is also its armature current b Has...
Problem 4 A synchronous generator rated 480V, 500kVA, 0.9pf, has a synchronous impedance of 160% on...
Problem 4 A synchronous generator rated 480V, 500kVA, 0.9pf, has a synchronous impedance of 160% on the generator base rating of 500kVA. The generator requires 5A of excitation current to maintain and open circuit voltage of 480V. If the generator is operating at 400k W at 0.9 p.fleading (delivering kVAR to the system), calculate the following assuming operated connected to a 480V infinite bus: (neglect internal resistance and losses) a) Armature current, I(a): (include magnitude and angle referenced to V(a)-277/0...
Question 1 (Synchronous Generator Voltage Regulation Calculations) The synchronous impedance of a 13.2 kVA, 440 V,...
Question 1 (Synchronous Generator Voltage Regulation Calculations) The synchronous impedance of a 13.2 kVA, 440 V, A-connected, three-phase, synchronous generator s itj 10 Ω/phase. Calculate the voltage regulation when the generator supplies the full load at a power factor of (a) 0.866 lagging, (b) unity, and (c) 0.866 leading. 10 Mark:s
please answer the following with all explanations included: Question 1 (25 points): The no-load voltage of...
please answer the following with all explanations included:
Question 1 (25 points): The no-load voltage of a PM de generator at 1800 rpm is 120 V. The armature circuit resistance is 0.02 ?. The rotational loss at 1800 rpm is 2.5 kW. If the generator is rated at e voltage regulation, and (c) the efficiency. 200 A, determine (a) the terminal voltage, (b) th
A 3-phase 480V, 4-pole, 60Hz, Delta- connected synchronous generator with the OCC shown here has an armature resistance of RA-0015Ω and 400 synchronous reactance ofX, 0.1.2. At full load, the machine supplies 1200A at 0.8PF lagging. Under full-load conditions, the friction and windage losses are 40kW, and the core losses are 30kW. Ignore field 300 200 circuit losses. a) If the generator is operated at full load, how much field current is required to keep the terminal 100 voltage constant...
e. A three phase generator turning at 1500 rpm has a terminal voltage of 15 kV, 50 Hz. If the synchronous reactance is 5 per phase, calculate the generated voltage if the following are connected to its terminals: i. Resistive load is 12 MW (5 marks) ii. Inductive load is 12 MVAR (5 marks) iii. Capacitive load is 12 MVAR. (5 marks) f. How will the generated voltage be affected in each of the case (a), (b) & (c) above?...
A second separately excited DC generator has the same electrical
parameters as the generator in part (a) first but does not have
compensating windings. The full-load demagnetising armature
reaction is equivalent to 500 Ampere-turns. (i) With Radj = 63Ω and
the generator is driven at 1600rpm, what is the no-load terminal
voltage? (ii) What would be the output terminal voltage if 364A
were drawn from the armature at 1600rpm?
Q2. (a) Fig. Q20) shows a separately excited DC generator with...
LAB MANUAL LAB EXPERIMENT - 04: LOAD CHARACTERISTICS OF SEPARATELY EXCITED DC GE ATELY EXCITED DC GENERATOR REVIEW QUESTIONS: 1. A separately excited generator has constant: a Field Strength b Load Current c Terminal Voltage The terminal voltage of a separately-excited generator a Goes up as load increases b Goes down as load increases C Stays the same as load increases. 3. The current drawn from a separately-excited generator by the load a is also its armature current b Has...
Problem 4 A synchronous generator rated 480V, 500kVA, 0.9pf, has a synchronous impedance of 160% on the generator base rating of 500kVA. The generator requires 5A of excitation current to maintain and open circuit voltage of 480V. If the generator is operating at 400k W at 0.9 p.fleading (delivering kVAR to the system), calculate the following assuming operated connected to a 480V infinite bus: (neglect internal resistance and losses) a) Armature current, I(a): (include magnitude and angle referenced to V(a)-277/0...
Question 1 (Synchronous Generator Voltage Regulation Calculations) The synchronous impedance of a 13.2 kVA, 440 V, A-connected, three-phase, synchronous generator s itj 10 Ω/phase. Calculate the voltage regulation when the generator supplies the full load at a power factor of (a) 0.866 lagging, (b) unity, and (c) 0.866 leading. 10 Mark:s
please answer the following with all explanations included:
Question 1 (25 points): The no-load voltage of a PM de generator at 1800 rpm is 120 V. The armature circuit resistance is 0.02 ?. The rotational loss at 1800 rpm is 2.5 kW. If the generator is rated at e voltage regulation, and (c) the efficiency. 200 A, determine (a) the terminal voltage, (b) th
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