Answer Posted / rajesh tokalapudi

This is mainly due to magnetostriction.means whenever a
ferro magnetic material is subjected to magnetism its
dimenstions will change.this will results in some noise.

description about dry type transformers

1951

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Whether amorphous core transformer is commercialized or not:Name of company making amorphous core transformer and what are different rating?

1853

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What are the effects of adding a zero to a system?

1373

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What is the basic principle of welding process?

2196

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What is the exact minimum vale of voltage between an earth and netural which can damage or can do malfunction of the electronic equipments ? If this is mentioned in any book, pl.give reference.

2338

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why we are not giving the zone 1 trip command to the master trip relay

1796

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Why derivative controller is not used in control systems?

1240

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As i want some model question paper in basic computer science and history please send me immediately sir

1945

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how can we understand that where we have to use ac or dc coil for solenoid valve and why?what is the different between coil of ac and dc explain please.

2027

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define the active power?

2093

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What is the suitable transmission voltage?

1115

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What is minimum permicible value of leackage current for LT Panle when applying voltage up to 3 KV for 5 Minuits?

2305

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what are the standard IR values should be of R-E, Y-E, B-E, R-Y, Y-B, B-R of VCB in closed condition and in open condition for 500KVA & 1000KVA transformers. and what is the acceptable range when tested by 5000V megger.

2388

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Whether should be the oil level in OCTC transfomer? It should be upto winding immersed completely or should be upto tap changer s/w? How it will affect the performance of the transformer. Rating may be 33KVA

1898

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in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know

1857

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