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1. A 3 phase, wye connected synchronous generator rated at 10kVA, 230V has a synchronous reactance of 1.2 ohms per phase and an armature resistance of 0.5 ohms per phase. Calculate the percent voltage regulation at full load if the power factor is 0.8 lagging. Draw the phasor diagram. Then, determine the power factor such that the voltage regulation is zero on full-load. 2. 150kVA 480 V, 60 Hz wye connected synchronous generator with a rated field current of 5 amps was tested and the following data was taken: The open circuit terminal voltage at rated field current was 530 volts The armature current at the short circuit condition was 300A When a DC voltage of 15 volts was applied to the two terminals, 30 amps was measured. Find the values of the armature resistance and synchronous reactance that would be used in the generator model at rated conditions. 3. A 480 volt, 60 Hz, Wye connected synchronous generator has eight poles. The synchronous reactance is 1.3 ohms. The full load armature current is 80A at 0.85 pf lagging. Friction and windage losses are 2kW and core losses are 1kW. Assume the armature resistance is negligible. The field current has been adjuested to make the terminal voltage 480V at no load. Determine the following: Speed of rotation Terminal voltage with at rated current with 0.85 pf lagging, rated current with unity power factor, and rated current with 0.85 pf leading. Draw a phasor diagram for each. What is the efficiency when operated at rated current and 0.8 pf lagging?. What is the shaft torque at full load? What is the voltage regulation at 0.8 pf lagging?
A ball is dropped from a height of 10 feet. Each time it strikes the ground, it bounces up to 80% of the previous height a.What height will the ball bounce to after it strikes the ground for the third time b.How high will it bounce after it strikes ..
A person accidentally grabs conductors connected to each end of adc voltage source, one in each hand. Assume that the resistance of an arm is 400Ohms, the resistance of a leg is 200 Ohms and the resistance of the trunk is 50Ohms.
A variant of the binary symmetric communication channel described in class is called a binary erasure channel. The transmitter sends a ‘0' or ‘1,' but at the receiver there are three possibilities: a ‘0' or ‘1' or ‘undecided bit..
According to the Nyquist sampling theorem, faithful reconstruction of an analog signal with a bandwidth of 29 kHz would require a sampling frequency of at least. what is the decimal equivalent of the following binary coded decimal number.
Design a circuit that takes the output from each of the five microphones your band uses and adds the voltage to create a single voltage signal which is fed to the amplifer. Except not all voltages should be equaly amplified.
How would you implement in the assembler a logical-shift-left(LSL) pseudo-operation for a machine that didn.t have this particular instruction Be sure your LSL instruction can shift up to W-bits where W is the machine word size in bits.
An unusual capacitor has a capacitance that is a function of time given by C = 2 + cos(2000t) μF in which the arugument of the cosine functionis in radians. A constant voltage of 50V is applied to this capacitor.
A computer employs RAM chips of 256 x 8and ROM chips of 1024 x 8. The computer system needs 2K bytes of RAM, 4K bytes of ROM, and four interface units, each with four registers. A memory-mapped I/0 configuration is used.
you have the task of ordering a replacement inductor for one that has become defective. The information on the nameplate has been painted over and cannnot be read. The machine that contains the inductor on 480V at a frequency of 60 Hz.
Problem Feeder - Transformer, A single-phase load is supplied through a 35 kV feeder whose impedance is 115 + j380 Ohms and a 35 kV, 2400 V transformer whose equivalent impedance is 0.26 + j1.21 Ohms referred to its low voltage side.
(1) What might be an example of an input and an output What are some simple examples of what constitutes the distinction between input into a program and output from the program (2) What type of arithmetic operations are supported in C++
Using DC Operating point analysis in Multisim (DO NOT USE MULTIMETER INSTRUMENT-NO CREDIT) determine the emitter voltage and emitter current. Provide a screenshot of the results window.
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