Answer / poorna

two voltages time displaced by 90 deg `can be called as two
phase if both the voltage are same then it is balanced one,
similarly three voltages time displaced by 120 deg forms a
3 phase system.

why we are giving D.C. supply to field of an alternator, why can't we give the a.C. supply

12 Answers   APTransco, Proman,

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can a generator with 15AH specified battery for starting can be connected to a battery of greater capacity?

2 Answers  

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We have two Al.busbars each of size 125mm*10 mm connected in parallel.To increase the current rating ,can we connect third busbar of size 100mm*10mm in parallel to existing two busbars?In my opinion ,if we connect busbars of different sizes in parallel,then the busbar of lowest size will take much current.So this type of paralleling should be avoided .Am I correct?

1 Answers   PDP Steel,

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What is the allowalable frequency variation in India and in US? Why there is the difference?

3 Answers  

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What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)

0 Answers   Equate,

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HOW WE CHOOSE EARTH'S POTENTIAL AS ZERO V?

0 Answers  

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orifice sizing how done, checking & selection

0 Answers  

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transformer spections :: input voltage 0-110-230v; output volage 0-10-12-14v; amp=3A using CRNO CORE, capcaity=50VA primary turns = ? ; secondry turns =?

0 Answers   Bhel,

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What is the difference between cylindrical-type and sandwich-type winding?

0 Answers  

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In a 3 phase system a neutral exists so that any unbalanced currents can flow through it towards earth.... but a phase demands a particular current as per the load attached to it....then where does the extra current come from the goes in the neutral??....I mean in an unbalanced system a phase demands a current as per its load attached....then where does the unbalanced current come from??

1 Answers  

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Why in 6 KV XLPE cable termination kit used and why not in 380 V xlpe cable same is not used

0 Answers  

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Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

0 Answers  

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