Describe with neat sketch the constructional details of IGBT.

State the necessity of synchroscope and with neat sketch explain its working.
Answer : ### Necessity of a Synchroscope A **synchroscope** is an important device used to measure and indicate the **synchronization** of the speed, frequency, and phase of an incoming alternator (generator) ... generator is in sync with the grid, and the circuit breaker can be closed to connect them....

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With the neat sketch explain working of Dynamometer type wattmeter.

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With neat sketch of PMMC instrument explain its working briefly.

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With neat sketch explain four modes of operation of a TRIAC.

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Explain the principle of operation of Doppler type ultrasonic flow meter with a neat labeled sketch.

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Illustrate with neat sketch the working of automatic power factor corrector as an energy conservation device.

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With neat sketch, explain working of directional overcurrent relay.

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State the possible location of mounting a projector in flood lighting with a neat sketch.

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Explain the working principle of transformer dimmers with the help of a neat sketch.

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Explain the different types of DC motors with a neat sketch.

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With neat sketch state the working principle of Star-Delta starter.

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Explain with neat sketch basic trip circuit of protection relaying.

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Explain working of vertical break isolator with neat sketch.

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Explain the working of a drinking water cooler with a neat sketch.

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Explain with neat sketch: (i) Earth resistance measurement using earth tester (ii) High resistance measurement using megger.

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Explain the shackle type insulator with neat sketch.

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Explain with a neat sketch the Pilot wire protection scheme applied to transmission line.

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Explain the differential protection scheme for busbars with a neat sketch.

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Explain with a neat sketch fault bus protection scheme.

Explain with a neat sketch fault bus protection scheme.
Answer : **Fault Bus Protection Scheme** A fault bus protection scheme is used to detect and isolate faults occurring on a busbar in electrical power systems. A busbar is a central connection ... widespread system disturbances and ensures continuity in the operation of other parts of the electrical network....

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Explain electric arc welding with a neat sketch.

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Describe with neat circuit diagram the measurement procedure of earth resistance for an installation.

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Describe the construction of an SF6 circuit breaker with a neat diagram.

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Describe the construction and operation of the Buchholz relay with a neat labeled diagram.

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Describe the working of an HRC fuse with a neat diagram.

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Describe the working of synchronous reluctance motor with the help of neat diagram.

Describe the working of synchronous reluctance motor with the help of neat diagram.
Answer : ### Working of Synchronous Reluctance Motor (SynRM) A **Synchronous Reluctance Motor (SynRM)** is a type of electric motor that operates on the principle of reluctance, similar to a ... certain applications, though it does have some limitations in terms of starting torque and power density....

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Describe emergency lighting system with neat diagram.

Describe emergency lighting system with neat diagram.
Answer : ### Emergency Lighting System An **emergency lighting system** is designed to provide illumination in the event of a power failure or when the normal lighting system is not functioning. These ... buildings of all sizes, especially in places like schools, hospitals, hotels, and office buildings....

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Describe spot welding and projection welding with neat sketches.

Describe spot welding and projection welding with neat sketches.
Answer : ### Spot Welding **Spot welding** is a type of resistance welding used to join two or more metal sheets by applying heat and pressure to a small, localized area. It works ... processes are efficient for mass production and can be automated, especially in industries like automotive manufacturing....

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