Answer Posted / sandeep m. parmar

yes a step down transformer can be used as step up if the
connections are reversed.

At what factor resistance r of a conductor depends?

1154

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what is the safe meggar values for motor, transformer HT, LT and Cables? IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace. why we generally use 3.5 core cable or in other word 1/2 core for neutral and also confirm me that in balance conditiob(3 phase)current in neutral will zero

2324

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In what condition the HT fuse breakes?

2086

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EXPLAIN THE TRANSFORMER MAINTENANCE?

2337

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Why two phase welding machine is used instead of three phase welding machine.

2004

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What is Primary And Secondary Injection Test of Relay and Other Electrical Devices. How IT is carried out.

3571

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How to Decide the Location of Earth pit for Compressor in Oil Depo? and How to measure the resistance of earth pit Pls explain me with the help of Circuit Diagram?

2562

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The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason

2499

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An impedance of 100 ohms resistance and an unknown inductance is connected across the capacitor. The resulting impedance is a pure resistance of 500 ohms ifω = 10^5 rad/sec. calculate the values of inductor and capacitor.

1476

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what is cathodic protection and why it use in industries?

2352

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Why do not we prefer non conventional sources of energy to conventional sources?

1247

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Briefing the effects of ASR and ACR of a double closed-loop speed regulating system.

2288

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mostly the questions were from machines... d.c. machines, transformer, synchronous and induction all theory paper........ few from power system... but the level of paper was easy.....

2025

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What is the relation between frequency and motor rpm?

1901

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Should power factor be low or high?

1220

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