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A factory takes a steady load of 200 kW at a lagging power factor of 0·8. The tariff is Rs 100 per kVA of maximum demand per annum plus 5 paise per kWh. The phase advancing plant costs Rs 500 per kVAR and the annual interest and depreciation together amount to 10%.Find:(i) the value to which the power factor be improved so that annual expenditure is minimum
(ii) the capacity of the phase advancing plant
(iii) the new bill for energy, assuming that the factory works for 5000 hours per annum.
design an excess-2 code inverters( in excess-2 code 0 isrepresented by0010,1 is represented by 0011, 2 is represented by0100 etc) . the four inputs to the converter circuit (A,B,C,D)represent an excess-2 code decimal digit.
Assume a 16-bit fixed point, two's complement representationwith 8-bits of integer and 8-bits of fraction. What is therepresentation of the following values in hexidecimal.
Find the distance in millimeters between the plates of a parallel plate capacitor if the maximum voltage that can be applied across the capacitor is 1250 V.
Derive the relationship between output phase angle and input phase angle.
How much force will be necessary to get it started sliding?
Design a Phase lag controller that will have a phse margin of about 60 degrees (you will need to be within 5 degrees for your design) A. Where are the poles and zeros B. What is the approximate value of the gain crossover frequency of the plant with..
A CT has a current ratio of 100/1. If the primary load current is 100 A, determine the excitation current, the maximum ratio error and the maximum phase angle error if the burden is 5 ohms. The CT characteristic gives an excitation current of 0.01..
Determine the controller parameters. Plot the system step response and analyze DS1, DS3 and DS4. Plot the system ramp response and analyze DS2.
Determine the output of the system described by the following difference equations with input and initial conditions as specified: y[n]+6y[n-1]-16y[n-2]=3x[n] x[n]=((-1)^n)*u[n] y[-1]=2 y[-2]=-1
A coil wound on a magnetic core is excited with the followingAC voltage sources: a) 100 volts, 50 Hz, b) 110 volts, 60 Hz.Compare the hysteresis losses and eddy current losses (ratio) forthe two different sources. For the hysteresis losses, assume..
Use the above transfer function and BLT to design a corresponding IIR digital lowpass filter with a cutoff freqency of 15 Hz and a sampling rate of 120 Hz. a. Write the transfer function of the digital filter.
The outer surface temperatures of the brick and insulation are 1260 degreeR and 560 degreeR, respectively , and there is perfect contact at the interface between the two layers. Determine at steady state the instantaneous rate of heat transfer
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