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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.
simplified common base hybrid model
Rise Time (t r ) During rise time voltage falls from 90% V a to 10% where V a where V a is the initial anode voltage. In terms of current time taken by anode curre
The devices in power system shown in Figure 2 have the following ratings: G1 : 100 MVA, 13.8 kV grounded Y, X” = 0.15 pu, X2 = 0.015 pu Xo = 0.05 pu G2 : 50 MVA, 20.0 kV grounded
short note on priming
Power Supply and Clock Frequency there are following pins for power supply and clock frequency signals. V CC + 5 V power supply. V SS Ground reference X 1
A three-phase, six-pole, wye-connected synchronous generator is rated at 550 V and has a synchronous reactance Xs = 2 . When the generator supplies 50 kVA at rated voltage and a p
If a television station operates on UHF channel 20 (band 506-512 MHz), determine the station's visual-carrier frequency.
The goal of this project is to model a system and to design a controller for the system so that the closed-loop system performs satisfactorily.
advantages over other theorams
Q. Explain about Rotating Machines? Themost widely used electromechanical device is a rotatingmachine, which utilizes themagnetic field to store energy. The main purpose of mos
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