Determine the electrical power the motor draws.
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Determine the electrical power the motor draws.
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- Maz a) A sinewave is having a frequency of 50 Hz and instantaneous value of 250 Volts at 1.3 milli seconds. Find D The maximum value of sinusoidal voltage waveform and i) The value of voltage at 2.1 milli seconds. b) Determine the instantaneous equation for the voltage waveform shown in figure, if Vp=100 Volts, Time period is 10 milli seconds and 0 =40 degrees. on Vp Upload your Answers steps in the "Final Answer Submission" Link provided in the Moodle. a) (i) Maximnum value = a) (ii) Value of voltage at 2.1 ms = b) Angular frequency =Real Power Versus Voltage curve may be used to assess the a.Steady state voltage stability b.Loading of that particular AC Generator c.Dynamic voltage stability d.Complete Voltage stability 2- kinetic energy stored in the rotor of a synchronous alternator is given by a.G * H * w b.m * a c.0.5*m*v*v d.S * Hb) A newly built institution has bought a D.C. shunt generator to supply a library in order for students to study using electrical power from this machine when there is load shedding on the national grid. The total load of the library is 50 kW through the cables of total resistance of 0.04. The winding resistance of the generator is 5092 and the armature resistance is 0.072832. The library is to be supplied at 0.4kV. i. Draw the circuit diagram indicating all the above stated values. ii. Determine the load current (IL). iii.Determine the terminal voltage of the generator. iv. Determine the armature current. v.Determine the E.M.F. generated in the armature.
- 8. The two winding transformer and the autotransformer of the circuit shown in Figure are ideal. Determine the conducting and transformed currents of auto transformer. N1=200 NBC=20 N2=100 NBA=30 10A B 200 V 50,Hz N1 : N2 lellll8 = 0 Q1: What does happen if we change two currents? Q2: What does happen if we have a three-phase four poles machine? a Q3: What does happen if we have a two-phase two poles machine? Q4: What does happen if we apply a capacitance in phase b and then use same voltage for both phase. Dr. Ali K....p. . --A docs.google.com/f 0 :D welding purpose is a shunt generator Indicate whether the following - * statement are true or false False True In a dc machine for the same value of Z, N, O armatūre, e.m.f. is more with wave winding than with lap winding
- A generating voltmeter is required to measure voltage between 15kV and 250kV. If the indicating meter reads a minimum current of 2uA and maximum of 35uA. Assume that the speed of driving synchronous motor is 1500rpm. Determine the capacitance of the generating voltmeter. A. 1,2 pF B. 6.5 pF C. 15,2pF D. 1 pFSHOW THE CIRCUIT AND COMPLETE SOLUTION A 75-KW, 440V DC generator has 90% efficiency during full- load and the maximum efficiency of the generator is recorded at 95.64%. Determine the constant loss and the variable loss.The terminal voltage of a 150 kW series generator is 600 V at rated load. The armature resistance is 0.06 ohms and the series field resistance is 0.04 ohms. Find generated emf.
- Q-4 100 MVA, 50 Hz alternator is operating at rated speed. The H constant of the machine is 5 MJMVA. The load suddenly increases by 50 MW. Due to delay in governor action, there is a delay of 0.5 sec in opening of steam value. The frequency deviation in percentage isThe DC shunt generator with the terminal voltage 300 V, armature drop 8 V and the each brush drop 4 v, then the value of generated emf is When the load on a series generator is decreased, then the flux produced will be decreased in direct proportion. Select one: O True O False6. Home Works: a) The figure below shows the per-phase equivalent circuit of a two- pole three-phase induction motor operating at 50 Hz. The voltage (E1) across the magnetizing inductance is 210 V, and the slip (s) is 0.05. What is the developed torque produced by the motor ? 0.04 N jo.22 Q j0.22 0 0.05 0 j6.28 NE E1 V