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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.
force and torque in magnetic field system
Describe properties of the conducting materials . Conducting materials are classified by low resistivity materials and high resistivity materials. Low resistivity mater
What do you understand by solid modeling and wireframe modeling in CAD systems? Explain and compare the both modellings. Describe the following 1. Boundary representation 2.
Q. Show Crystal - Oscillator Circuits? The simplest crystal-oscillator circuit is shown in Fig. 6-2A. An equivalent circuit is shown in Fig. 6-2B., where C4 represents the grid
Illustration the basic working principle, process parameters, economics, safety precautions and applications of plasma Arc Machining process(PAM) Discuss Electron Beam Machining
Impurities in Semiconductors Can be added in accurately controlled amounts. Can modify the electronic and optical properties. Used to change conductivity over wide ra
Q. For themagnetic circuit shown in Figure, neglecting leakage and fringing, determine the mmf of the exciting coil required to produce a flux density of 1.6 T in the air gap. Them
Q. Explain working of Shaded-pole motors? Shaded-pole motors: The least expensive of the fractional-horsepower motors, generally rated up to 1 / 20 hp, they have salient stator
Factors Contributing To High Technical Losses Power distribution systems in developing countries have faced a phenomenal and rapid growth within the last two decades. Although
No-load and blocked-rotor tests are conducted on a three-phase,wye-connected inductionmotor with the following results. The line-to-line voltage, line current, and total input powe
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