PROBLEM 5.7 A 200 KVA, 2300 Volt, 3 phase alternator, star connection. Calculate the no-load voltage...
PROBLEM 5.7
A 200 KVA, 2300 Volt, 3 phase alternator, star connection.
Calculate the no-load voltage the alternator must have when:
A) The regulation percentage is 10.5.
B) The regulation percentage is 26.3.
C) The regulation percentage is -13.2.
Homework Answers
Add Answer to:
PROBLEM 5.7
A 200 KVA, 2300 Volt, 3 phase alternator, star connection.
Calculate the no-load voltage...
A 750-kVA, 11-kV, 4-pole, 3-phase, star-connected alternator has percentage resistance and reactance of 1 and 15...
A 750-kVA, 11-kV, 4-pole, 3-phase, star-connected alternator has percentage resistance and reactance of 1 and 15 respectively. Using approximate method, calculate the synchronising power and torque per mechanical degree of displacement at full-load 0.8 pf lag. The terminal voltage in each case is 11 kV.
1- A 25-kVA, 3-phase, wye-connected, 400-V alternator has a synchronous reactance of 1.6 ohms per phase....
1- A 25-kVA, 3-phase, wye-connected, 400-V alternator has a synchronous reactance of 1.6 ohms per phase. The alternator is to have zero voltage regulation at half-load. Neglecting the armature resistance, find the operating power factor and the developed power 2. A 500-kVA, 3600-V, 3-phase, 60-Hz alternator has an effective armature resistance per phase of 0.40 ohm Mechanical and iron losses is 10 kW, field current at full load unity power factor is 70 A. The exciter voltage is constant at...
A 400 v, 50 Hz, three phase alternator, rated at 75 kVA, is star connected and...
A 400 v, 50 Hz, three phase alternator, rated at 75 kVA, is star connected and driven at 1000 r/min. The windings of the alternator have a resistance, per phase, of 0.03 Ω and synchronous reactance, at 50 Hz per phase, of j0.325 Ω. The stator of the alternator has 108 slots, with 8 conductors, per slots, in a double layer. The maximum pole flux is 8.772 x 10-3 Wb. To improve the wave form only 80% of the pole...
A 1,500 kVA, 3-phase alternator is connected to an infinite busbar at constant voltage of 11,000...
A 1,500 kVA, 3-phase alternator is connected to an infinite busbar at constant voltage of 11,000 volts. The resistance and reactance per phase are 0.10 ohm and 2.4 ohms respectively. Find (a) the maximum external load that the machine can supply when the machine is excited to give an emf of 12,500 volts, (b) the current and pf at the maximum output.
A wye-connected 200 kVA, 440 V, 3-phase alternator yields 150 V between the terminals on short...
A wye-connected 200 kVA, 440 V, 3-phase alternator yields 150 V between the terminals on short circuit. With the field excitation unchanged, the short circuit current is 300 A. The ohmic resistance of this machine between line terminals is 0.10 ohm and the ratio of the effective to ohmic resistance is 1.25. Calculate the full load terminal voltage of the machine when the excitation is adjusted to yield a no-load of 500 volts between lines and the power factor is...
Calculate the apparent power in kVA for a 200 amp, 120/208 volt, 3-phase service. Select one:...
Calculate the apparent power in kVA for a 200 amp, 120/208 volt, 3-phase service. Select one: a. 769 kVA b. 72 kVA c. 576 kVA d. 432 kVA
3 A 11-KV, has a full-load quadrature-axil IV. three-phase, 20-pole, star-connected, salient-pole synchronous alternator full-load current...
3 A 11-KV, has a full-load quadrature-axil IV. three-phase, 20-pole, star-connected, salient-pole synchronous alternator full-load current of 1000 A The resistance of the rotor is 1,2 phase The rature-axis synchronous reactance per phase is 4.8 and the direct-axis nchronous reactance per phase is 3, 62 Determine for a lagging power factor of 0,8 a) the load angle, b) the developed power, c) the reluctance torque, and d) the voltage regulation СНАР 245 MM401EE
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
A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which...
A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which is connected to the 240-volt secondary winding, absorbs 80 kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: a) primary voltage. b) load impedance. c) load impedance referred to the primary. d) the real and reactive power supplied to the primary winding
3.4 A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load,...
3.4 A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which is connected to the 240-volt secondary wind- ing, absorbs 80 kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: (a) primary voltage, (b) load impedance, (c) load impedance referred to the primary, and (d) the real and reactive power sup- plied to the primary winding.
3 A 11-KV, has a full-load quadrature-axil IV. three-phase, 20-pole, star-connected, salient-pole synchronous alternator full-load current of 1000 A The resistance of the rotor is 1,2 phase The rature-axis synchronous reactance per phase is 4.8 and the direct-axis nchronous reactance per phase is 3, 62 Determine for a lagging power factor of 0,8 a) the load angle, b) the developed power, c) the reluctance torque, and d) the voltage regulation СНАР 245 MM401EE
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
A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which is connected to the 240-volt secondary winding, absorbs 80 kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: a) primary voltage. b) load impedance. c) load impedance referred to the primary. d) the real and reactive power supplied to the primary winding
Most questions answered within 3 hours.
-
The froghopper (an insect, not a frog), Philaenus spumarius,
holds the world record for insect jumps....
asked 14 seconds ago -
PLEASE USE R FOR THE FOLLOWING! I NEED THE CALCULATIONS FROM R
TO THE NEAREST 0.0001...
asked 3 minutes ago -
A ligand is any ________ forming a coordinate bond to a metal
cation.
A. Lewis acid...
asked 2 minutes ago -
Net Present Value Method The following data are accumulated by
Reynolds Company in evaluating the purchase...
asked 19 minutes ago -
In a radiobiology experiment a mouse is irradiated by
γ-ray. The lethal dose (dose which kills...
asked 21 minutes ago -
Derive the relationship between the half-life of a first order
reaction, t½ , and the rate...
asked 24 minutes ago -
The Blasco case involved a payday loan, for which she
was paying 6,500 percent interest. Some...
asked 33 minutes ago -
Of the following, which is/are true about the process of
swapping a page out of DRAM...
asked 32 minutes ago -
A scientist purchases two samples of pure polystyrene. One is
opaque and the other is not....
asked 41 minutes ago -
The table and graph below describe the supply of umbrellas per
month in Peoria.
Supply of...
asked 1 hour ago -
You want to determine the control lines for a "P" chart for
quality control purposes. If...
asked 1 hour ago -
C Programming Homework
Question 1.
The task is to demonstrate the knowledge of using
conditional statements...
asked 58 minutes ago