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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.
Give three reasons why a chamfer shouldn't be considered an "unimportant" dimension. When conducting an audit, what is the first step and what is its purpose? Why will calcul
Q. An FM station's modulator has a sensitivity k FM = 5π × 10 4 rad/s·V. A receiver uses a discriminator that has a gain constant of 10 -5 /π V·s/rad. Neglecting noise, determin
Balanced Wye-Connected Load Let us consider a three-phase, four-wire 208-V supply system connected to a balanced wye connected load with an impedance of 10 20° , as shown in F
Q. Explain the fixed bias circuit? The Fig refers to the common emitter collector characteristics and the ac and dc load lines.The Fig shows the points Q 1 and Q 2
Determine i L (t) and v C (t) for t> 0 in the circuit given in Figure.
find Ic Vc Icsat Vcutoff
The covers of electrical machines are made of (A) Soft magnetic materials. (B) Hard magnetic materials. (C) Super conductors. (D) Semicond
Stratos Corporation is a privately held tablet semiconductor technology firm with bright growth prospects.The past 5 years have seen the firm evolve from a pure startup to a profit
A balanced star-connected load is connected across a three phase 450V 50 Hz AC supply. Each load element has an impedance of 5+j12 Ω. Calculate: (i) The power factor of the
if load is removed so which motor will run fast? series or shunt?
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