Answer / chaitanya

when the core of the solenoid is cojusted or less than the
required area.as the windings are placed very closer the local
currents will diffuse with each other (or collide) which will
cause in production of the humming sound...this i had
personally experienced when i am preparing a solenoid core
transformer for my project....

Answer / ashok bhatnagar

The core vibrates at the frequency of supply and therefore
produces sound due to phenomenon of magnetostriction

Where can I get Iidian straderd specifications for electrical items or works in web? please help me.

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what is the meaning of improving the power factor (give technical ans not therotical)

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two 100W/230V bulb are connected in series. what would be the voltage drop across 1 bulb

6 Answers  

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The principle of switching circuits for different types of batteries in application of storage systems

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Explain why the Voltage drop will happen in 3 Phase line?

3 Answers  

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if reactive power become zero in transmission system then what effect on system.???

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what about the input current fan when regulator regulates to speed low?

1 Answers  

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I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase, before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???

1 Answers  

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Why not implimenting power factor in Diesel generator

6 Answers   HP,

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