A 100-kVA synchronous generator has a total loss of 5.5 kW when it delivers rated kVA...
A 1500-kVA, 6.6 kV, 50 Hz, 6-pole, three-phase, star-connected synchronous generator has a resistance 0.5Q/phase and a synchronous reactance of 5Q/phase. The generator is supplying its rated power at its rated voltage and at a power factor lagging. The rotational loss is 2 kW. Calculate: (a) the power developed, (b) the power angle, (c) the voltage regulation, and (d) the shaft torque. A 1500-kVA, 6.6 kV, 50 Hz, 6-pole, three-phase, star-connected synchronous generator has a resistance 0.50/phase and a synchronous...
Please correctly answer question and post all steps! Will rate! Thanks! A 480 V, 375 kVA, Y-connected synchronous generator has a synchronous reactance of 0.4 Ω and a negligible armature resistance. This generator is supplying power to a 480 V, 80 kW, Y-connected synchronous motor with a synchronous reactance of 1.1 Ω and a negligible armature resistance. The synchronous generator is adjusted to have a terminal voltage of 480 V when the motor is drawing the rated power at unity...
Tebuiativit is wi t hin PP- A 10-KVA, 380-V, 60-Hz, 2-pole, three-phase, Y-connected, synchronous generator delivers the rated load at 0.8 pf lagging. The synchronous im- pedance is 1.2 + j4 N/phase. Determine (a) the synchronous speed, (b) the generated voltage per phase, and (c) the efficiency if the fixed loss is 1 kW. T i ll munghronous menerator has a
Consider a 3-phase, 4 pole, 60Hz, 450 V synchronous generator rated to supply 1687.5 kVA to a ship distribution system requiring a 0.8 lagging power factor. (a) If this machine was operating at rated conditions, what would the real (P) and reactive (Q) power and the current being supplied? (b) If the generator has an efficiency ( η ) of 95%, what torque does the prime mover provide? (c) What is the speed of the rotor (rpm)?
A four pole, Y-connected synchronous generator rated at 200 kVA, 4.62 kV, 0.82 lagging, and 50 Hz has an armature resistance of 0.97 ohms, a synchronous reactance of 8.7 ohms, core loss of 12.3 kW, and friction+windage loss of 13.9 kW. a. find the mechanical speed of the shaft. b. find the rated current, expressing the answer in polar form. c. compute the internally-generated voltage, expressing the answer in polar form. d. find the input power without neglecting the armature...
please answer 13.16 at rated load of unity power factor and rated terminal voltage, determine efficienc including field rheostat loss. Ans. 93.139 13.11 A generator under test is rated at 100 KVA, 3-phase, 60-Hz; 2,400 volts. (a) If driven b a de motor unexcited, the motor output is 1.26 KW. (b) If driven by a de motor, generato on open circuit and excited to generate rated potential, the motor output is 2.5 KW. ( Ifdriven by a de motor, generator...
For the 480 V, 900 kVA ABB AMG0400 synchronous generator (specifications) operating at 480 V, 900 kVA and 0.9 lagging power factor, calculate: a. The internal voltage (answer: 310 V) b. The power lost in the windings. (12.3 kW) For the 480 V, 900 kVA ABB AMG0400 synchronous generator Ģpecifications) operating at 480 V,900 kVA and 0.9 lagging power factor, calculate: a. The internal voltage (answer: 310 V) b. The power lost in the windings. (12.3 kW) Notes: For the...
Question 5 (Svnchronous machines) a. A synchronous generator connected to an infinite grid has its frequency and terminal b. A six-pole, Y-connected three-phase synchronous machine rated 208 V (line-to- voltage fixed. What is the effect of increasing the excitation current in this case? line), 5500 VA has a synchronous reactance of 8 2 per phase at rated terminal voltage. It is operating as a generator connected to an infinite grid Determine the excitation voltage and the power angle if the...
A synchronous generator is driven by a diesel engine to provide electricity to a remote mining operation. The generator is three-phase, Y-connected, 60 Hz, 900 rpm, 600 V, 3300 kW, 4125 kVA, and it has a synchronous reactance of 0.120 Ω per phase. Ignore all losses, and assume the machine iron is not saturated.(a) The generator is set to deliver its rated active power at unity power factorand rated terminal voltage. Determine:i. The speed of the diesel engine driving the generator;ii. The rotor electrical...
Question 4 (10 marks) A) A 10-kVA, 415-V, three phase, Y -connected synchronous generator has a winding resistance of 0.3 Q and a synchronous reactance of 0.6 on a per phase basis. Determine its voltage regulation at full load when the power factor is (a) 75% lagging and (b) 75% leading. B) (10 marks) A 220-V, Y-connected, three-phase, synchronous motor has a synchronous reactance of 4 O/phase and negligible armature winding resistance. At a certain load the motor takes 7.5...