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1. Name the three parts of a programmable logic controller (PLC) and explain why the PLC is preferred by designers over electromechanical relays.
2. Medium-voltage circuit breakers operating on system voltages between 600 volts and 15 kilovolts generally contain blow-out coils and a puffer. Describe a puffer.What is its funtion?
3. How is an electrical distribution system protected from lightning strikes? Name and describe the device used and describe its electrical connection to the distribution system it protects.
4. The first step in preparing a primary distribution cable for connection to a transformer, tap box, or other terminal equipment is to remove the semiconducting jacket. The next step is to crimp a flat lug onto the cable connector. List in any order any three of the next six steps in making the connection.
find E*(s) for E(s)=1-e/s(s+1)
Q. Enumerate different types of errors in measurement. How can these errors be minimized. Sol. Types of errors: Errors may arise from different sources and
Consider the circuit shown in Figure in the t -domain as well as in the s-domain. Formulate the s-domain nodal equations and use MATLAB to solve for V A (s) and V B (s).
Q. Prove mathematically that the operating point does not depend on beta, in a potential divider bias circuit ? To determine the operating point, consider the input section of
Q. A60-Hz, three-phase transmission line has a total per-phase series impedance of 35+j140 .Ifit delivers 40 MW at 220 kV and 0.9 power factor lagging, find: (a) The voltage, c
Q. Elucidate the nature of signals produced on subscriber's loop by a pulse dialer and a touch tone dialer. Ans: DTMF is a simple two-of -eight encoding scheme where every
Q. Two 1150:115-V transformers are to be inter connected for (a) 2300:230-V operation, and (b) 1150:230-V operation. Show the interconnections and appropriate polarity markings.
Q. What is Message Demodulation? The major advantage of the conventional (standard) DSB AMsignal transmission is the ease with which the signal can be demodulated. Themessage s
just to put an assignment Give only short details that are important Specially bised clamper
Transmission: The policy emphasizes in which adequate and timely investment along within efficient and coordinated operation is essential for developing a robust and integrate
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