10.1 A 3 MVA, 50 Hz, 11 kV, 3-phase, star-connected Alternator when supplying 100 A at zero pf leading has a line to line voltage of 12.37 kV. When the load is removed the terminal voltage falls down to 11 kV. Determine the voltage regulation of the Alternator when supplying full load at 0.8 pf lagging. Assume an effective resistance per phase of 0.4
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- Alternator A (100 kVA, 3-f, 240 V, 60 Hz, 1800 rpm) is operating in parallel with alternator B (125 kVA, 3-f, 240 V, 60 Hz, 1800 rpm). The load of alternator A is 70 kW at 85% pf leading and the load of alternator B is 85 kW at 75% pf leading. Determine the pf of load.b) Two alternators are connected in parallel to feed a load together. The no-load frequency of the first alternator is 51.5 Hz and its slope is 1MW / Hz. The no-load frequency of the second alternator is 51.0 Hz and its slope is 1MW / Hz. The total power of the load fed by these two alternators is 2.5MW and the power factor is 0.8. Accordingly, at what frequency does this system work and what are the power values transferred to the load by each alternator.A three-phase 3300V. 50 Hz star-connected alternator has an effective resistance of 0.5 ohm/phase. A field current to of 30A produces full-load current of 180A on short- circit and a line to line emf of 1000V on open circit Determine(i) the power angle of the alternator when it delivers full-load at 0.8p.f(lag) (ii)the SCR of the alternator D
- Please solve the problem and show the circuit diagram. Thank you. 3. A 5 MVA, 13.2 kv, 3-phase wye-connected alternator has an effective resistance of 0.8 ohm and a reactance of 15 ohms per phase. It delivers full-load current at 0.707 lagging power factor at rated voltage. What will be the terminal voltage for the same excitation and load current, if the power factor is 0.6 leading?Kindly solve the problem with step by step complete solution. Also, put the given and formula used so that I can understand. Thank you. A 2200V, 60 Hz, three-phase, Y-connected alternator has an effective resistance per phase of 0.5 ohm. A field current of 30A produces a full load current of 200A on short circuit and a line-to-line emf of 1100 V on open circuit. Determine the power angle of the alternator when it delivers full load at .80 lagging pf.A 4MVA, 13.3 kV, 60 Hz, 3 phase, delta connected alternator has aneffective resistance of 5.2 ohm per phase and a combined armaturereactance of 54 ohm per phase. Determine the full load generatedvoltage per phase :a) At unity power factorb) At 0.8 power factor leadingc) At 0. 866 at power factor lagging Whole Solution
- Two identical, 3-phase, Y-connected alternators A and B share equally a load of 10MW at 33kV at 0.8pf lagging. The synchronous reactance of each machine is 4 ohms per phase and the armature resistance is negligible. Alternator A has its field excitation adjusted to carry 125A lagging current. What is the current supplied by alternator B?Don't use other platforms answer and also don't use chatgpt. A 3 phase 6000 kVA, 6600V, Y connected 2 pole 60 Hz alternator has the following characteristics: a. Field current= 125A, Open Circuit Voltage line value=8000V, Short circuit current=800A At full load the resistance drop is 3%. Find voltage regulation at power factor of 0.8 lagging.A 3-phase star connected, 1500 kVA, 13 kV alternator has an armature resistance of 0.9 ohm and a synchronous reactance of 8.0 ohms. When carrying rated load voltage, calculate the generated voltage per phase at loads of I.) Unity P.F. ii.) 0.8 lagging P.F. iii.) 0.8 leading P.F. iv.) calculate the voltage regulation for each load and determine best regulation.
- A 1200 kVA, 6600 volts, 3-phase Y connected alternator, has an effective resistance of 0.4 ohms and a synchronous reactance of 6 ohms per phase. It delivers full load current at 0.8 lagging power factor at rated voltage. What will be the generated voltage if the power factor is change to 0.8 leading. Solve for the % voltage regulation both for 0.8 lagging and 0.8 leading power factors.The voltage regulation of an alternator having 0.75 leading p.f. load, no-load induced e.m.f. of 2400V and rated terminal voltage of 3000V is............... percent. *A 1200 kVA, 6600 volt, 3-phase, Y-connected alternator has an effective resistance of 0.40 ohm and a reactance of 6 ohms per phase. It delivers full load current of 0.80 lagging power factor at rated voltage. What will be the terminal voltage for the same excitation and load current if the power factor is 0.80 leading? a. 4,560 V b. 9.878 V c. 7.898 V d. 4,250 V Choose the letter of the correct answer. Show your solution.