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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.
wht is a zener diode
What is Inductor Inductor, also known as a choke, is another passive type electrical component designed to take benefit of this relationship by forming a much stronger magnetic
Norton's Theorem Nortons Theorem states: "Any linear circuit containing several energy sources and resistances can be replaced by a single Constant Current generator in para
The present window that is being used.
Q. Explain working of Digital Process Control? Figure shows a block diagram for microcomputer-based control of a physical process, such as a chemical plant. A slight variation
Binary Division Similar to multiplication division can be seen multiple subtractions. For example if we have to divide 9 by 4 we can subtract 4 ,2, times until is is
Q. Consider the circuit of Figure with V S = 94 V, V Z = 12 V, R = 820 , R L = 220 , R S = 0, and R Z = 25 . Assume the reverse saturation current of the zener diode to be
When both MT 2 and Gate are positive In this junction P 1 N 1 and P 2 N 2 are forward biased whereas junction N 1 P 2 is reverse biased. The gate current flows thr
Decrement contents of Register The contents of register R will be decremented by one and the result is stored in the same register R. It is also an exceptional case i
A four-pole, three-phase inductionmotor is energized from a 60-Hz supply. It is running at a load condition for which the slip is 0.03. Determine: (a) The rotor speed in r/min.
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