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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. Working of Equalizer circuit? Equalizer circuit: Equalizers are combination of passive components (capacitors, resistors and so on) that are used to regulate the amplitude a
Q. A three-phase, 50-Hz induction motor has a full load speed of 700 r/min and a no-load speed of 740 r/min. (a) How many poles does the machine have? (b) Find the slip and t
For the circuit of Fig: (i) using Kirchoff's Laws , find all the currents (ii) determine the voltage across each resistor and check that all loops comply with KVL (iii
role of trigger circuit in cro
Q. What do you mean by Retention of Risk? Retention of Risk: In case of this method, the organization voluntarily accepts the risk since either the risk is insignificant or its
Q. Show Applications for Synchronous Motors? With constant-speed operation, power factor control, and high operating efficiency, three-phase synchronous motors are employed in
i have selected this paper as my semester project according to teacher we have to fully implement it. i need its full written matlab code simulink model and results. can you help m
a) Define the blending function reparanetrization. b) Four position vectors P1[0 , 0], P2[1 ,1], P3[2 ,-1] ,P4[3, 0] are provided with tangent vectors P1'[1,1] and P4'[1,1]. Cal
Q. Show a block diagram of a 4-bit, parallel-input shift-right register and brie?y explain its operation.
An oil-filled transformer has a c.m.r. of 500 kVA which allows it to run continuously in an ambient of 35°C with an oil temperature rise of 50°C. The transformer has a time constan
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