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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.
Q A handbook lists the 60-Hz resistance at 50°C of a 900-kcmil aluminumconductor as 0.1185/mile. If four such conductors are used in parallel to form a line, determine the 60-Hz r
Uninterruptable power Supply An uninterruptible power supply provides emergency power when utility power is not available. It maintains the supply under all condition
Q. Describe about Boltzmann constant? The constant η in Figure (b) stands for the noise power spectral density, expressed in terms of power per unit frequency (W/Hz). Statistic
just to put an assignment Give only short details that are important Specially bised clamper
Discuss DOS function call with one example. DOS function call: So as to use DOS function calls, always place the function number in register AH and load all other pertinent
Q. Show Advantages of Oscillators? Although oscillations can be produced by mechanical devices (e.g. alternators), but electronic oscillators have the following advantages:
Transparent latch D flip Flop A typical example of this type of D flop is 7475 shown in figure when CLK connected is enable signal is high and the flip flop is enabled
Q. A table for the direct 3-bit binary decoding is given. Show a block diagram for a 3-to-8 decoder and suggest a method for its implementation.
physics of solids
Tools for Power Supply The several universal tools those could be applied in the power-sector for the improvement of organizational efficiency and effectiveness. These tools v
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