Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Question 1:
The diagram below is the schematic of a protection system for a 33/11kV double transformer substation in which the 33kV switchboard and the 11kV switchboard are at the same location. The protection arrangements for T2 are the same as those for T1. Define and describe the system components, their mode of operation and where appropriate their zone limits. Indicate with reasons those elements that need to discriminate (grade) with other elements and those which do not.
Question 2:
In the above schematic, two Neutral Earthing Resistors are used. Would it be possible to use only one for both transformers? If so, what are the operational or other disadvantages and how could they be overcome?
Question 3:
The diagram below is the schematic of a protection system for a 33/11kV double transformer substation arranged as transformer feeders with no 33kV switchgear at the supplied substation.
The protection arrangements for T2 are the same as those for T1. Describe the operation of the protection scheme and contrast and compare it with the scheme described for Question 1. Indicate with reasons those elements that need to discriminate (grade) with other elements and those which do not
Fundamentals of Electric Circuits fourth edition: alexander, sadiku chapter 12 problem 12.29 A balanced three phase wye-delta system has Van= 120 angle 0 Vrms and Zdelta= 51+ j45 ohms. if the line impedance per phase is 0.4 + j1.2 ohms,
The sampling frequency in a DSP system is fs=8 kHz. Anti-aliasing filter used in the system is the second-order Butterworth filter with cutoff frequency of fc=3.4 kHz. What is the percentage of aliasing level at the frequency f=2.5 kHz
CdS photodetector is irradiated by light with wave-length of 450nm and intensity of 30Wm^-2. If the band gap of CdS is 2.4 eV and all electron-hole pairs are extracted without recombination. What is current density of this photodetector
Compare the Bandwidths of Two Inverting Amplifiers a) Use Signal Express to measure the 3 dB bandwidth for the inverting amplifier with a gain of -10 and for an inverting amplifier with a gain of -50. b) How does the bandwidth change with gain
Prove the validity of the simple rule for finding 2's complement of a number. Recall that the rule states that scanning a number from right to left, all 0s and the first 1 are copied; then all remaining bits are complemented.
When a cloud passes over a certain spot on the surface of the earth a vertical electric field of E = 100 V/m is recorded there. The bottom of the cloud is a height d = 300m above the earth and the top of the cloud is 600m above the ground.
A circular line charge of uniform line charge density q(C/m) is located in z=0 plane with its center at the origin. Determine, a. The electrostatic potential V at a point along the z-axis (0, 0, z) b. The electrostatic field E a point along the z-axi..
Define X and Y to be two discrete random variables whose joint probability mass function is given as follows: P(X = m, Y = n) = e^7*4^m*3^n?m / m!(n m)! , for m = 0, 1, . . . , n and n = 0, 1, 2, . . . , while P(X = m, Y = n) = 0
What is the (approximate) maximum electric field intensity for which constant mobility may be assumed for electrons in silicon. In a digital circuit with a supply voltage of 1V, what is the corresponding gate length for MOS transistors.
The relative dielectric constant of the printed circuit board (PCB) is 4 and the microstrip lines have a characteristic impedance of 80W. The length of the microstrip lines are 30mm and 45mm, respectively.
1. Determine the peak-to-peak current ripple in the output inductor for a forward converter and determine the output voltage ripple of the converter. We know the following parameters: duty cycle d, input voltage Vin, turn ratio.
An altimeter can measure 0-100m; using a signal conditioner, this high position is distributed over a voltage range of 0-5V. If an ADC covering the same voltage range outputs 1000 0000, what is the distance measured
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd