why the colour of insultor stack , petticoat is brown. Is it has some technical reason.

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In Indian Railways , how the AC motor is driven? Please explain clearly starting from the overhead 25kV supply.

1 Answers  

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Can u explain : how capacitor act when the supply is given is a.c and d.c. I know that when d.c supply is given then the capacitor charges and becomes open circuited. But please say about when a.c is given. I have seen that when a.c supply is given ,it charges and discharges, But when we plug in capacitor to our daily supply and take it out ,then we join those wires spark will appear,which seems charge is present ,but when a.c is given it should charge and discharge

3 Answers  

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what is the reason for choosing DYn11 in transformer, why not DYn12 or something else

1 Answers  

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we use Dyn11 trafo for distribution purpose, if it`s possible for replacing Dyn1. if it`s change means what will happen?

1 Answers  

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what is the difference between changer, converter and transformer?

0 Answers  

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When semiconductor fuse does save thyristor in each cycle of conduction? Why under voltage setting keep less in SPRS and more in DC drive?

0 Answers  

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what type of protection and safety req. in the 220kv substaion and area around the substation

2 Answers  

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what is the difference between earthed cables and unearthed cables

2 Answers   Bhel,

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What is primary distribution and secondary distribution of ac power?

3 Answers  

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As we know induction squirrel cage motor torque Directly praprortinal to applied voltage in star connection & delta also. If I connect 55KW Motor to DOL starter in load condition does motor withstand the load & what will be the current withdrawn ? motor will not fail ?

0 Answers  

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what is the difference between ELCB and RCCB

5 Answers   Concorde, Hyundai,

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