Draw a neat labeled sketch of a three-point starter.

A three-phase transformer having a line voltage ratio of 0.4 kV/11kV is connected Star/Delta and protective transformers on the 0.4 kV side have a current ratio of 500/5. Calculate the ratio of ... on the 11 kV side. Draw a neat circuit diagram and indicate the given values at appropriate places.

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Explain with neat labeled diagram measurement of flow using a venturimeter.

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

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Explain the “Differential Protection Scheme” used for alternators with a neat labeled diagram.

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Explain working of autotransformer starter for a 3 phase induction motor with neat diagram.

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Explain with a neat sketch the construction and working of Pelton turbine used in hydro power plant.

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Explain the function of different parts of a typical nuclear power plant with a neat sketch.

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

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Describe the operation of a current differential relay with a neat sketch.

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

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Describe the process of ultrasonic welding with a neat sketch and mention its applications.

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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.

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Describe the vapour compression refrigeration system with a neat sketch.

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Explain electric arc welding with a neat sketch.

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Why is a 4 point starter used?

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Why is a 3 point starter used?

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What is the necessity of synchroscope in power system? Explain with neat sketch the working of synchroscope.

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State the necessity of synchroscope and with neat sketch explain its working.

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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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Describe with neat sketch the constructional details of IGBT.

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Describe with neat sketch the construction and working principle of MOSFET.

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Describe with neat sketch the installation of plate earthing.

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Describe with neat sketch any one type of earthing system.

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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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Describe with neat sketch working of hysteresis motor.

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Describe with neat sketch the working of shaded pole induction motor.

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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 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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Describe with neat sketch the arc extinction in SF6 circuit breakers.

Describe with neat sketch the arc extinction in SF6 circuit breakers.
Answer : Arc extinction in SF6 (Sulfur Hexafluoride) circuit breakers is an important process to safely interrupt electrical arcs formed when the contacts of the breaker open under high-voltage conditions. SF6 is used in circuit breakers because it has excellent ... | | | B |...

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