Answer / rvg

SMPS- switch mode power supply is the best solution for
such frequency variable supplies.

Answer / yuvi

I completely agree with Rvg. SMPS is the best possible
solution when it comes to varying the frequency and
voltage. Good thinking Rvg. Compact, efficient and
effective, the only disadvantage is radio noise created by
it which can be easily shielded.

Answer / vinay

using PIU(POWER INTER FACE UNIT).its working is i/p voltage
is HIGH r LOW.but o/p is CONSTANT.

Answer / k.prakashchandra

Frequency is dependent on the prime mover, the speed
regulation of which, is very bad.

Answer / vikramsenareddy

please arrange AVR( autometic voltage regulator)

Answer / shilpa

the logic behind stabilising the frequency fluctuations is
to slow down the rate of change of current in the circiut.
we should use a proper rating inductor in serieswith the
supply....thats it.

Answer / mubashar ali

Question is not clear , bcz i dont know about source of
power, if generator then u should be istalled AVR, not
possible this fault in grid supply

A 100KVA SINGLE PHASE TRANSFORMER 10000/200V,50HZ REQUIRES 300V AT HV SIDE TO CIRCULATE FULL LOAD CURRENT WITH LV SHORT CIRCUITED.THE INTAKE IS 1000W.THE % OF REGULATION ON FULL LOAD AT 0.8 PF LAGGING WILL BE HOW MUCH AND THE SECONDARY TERMINAL VOLTAGE ON 0.8 PF LEADING WILL BE

0 Answers   IAS, TATA,

what is subtransient , transient and steady stateac components

0 Answers  

Explain What will happen when direction of field current is changed (i.e, field excitation is reversed) in the following machines? 1) Alternator 2) Synchronous Motor 3) D.C Generator ( Shunt or Seies ) 4) D.C Motor ( Shunt or Seies )

3 Answers   NTPC, Transco,

to vary valtage from 0 - max a variac is necessary . so how to design for high power applications nearly about 200KW power

0 Answers  

what is the minning of propotional, integral, derivative ?

1 Answers  

-What shall be short circuit current of LV switchgear for a 1000 kva, 11.415kv, 3 phase tranformer with 5% reactance.

0 Answers  

what is difference b/w squirrel cage rotor and wound rotor

2 Answers   Bhel, Electrical,

hai friends i have BSNL JTO exam on next month so if any body have model question paper or give preparation tips to my mail id kumar4486@yahoo.co.in this will helpfull for my future .plz & thank u by kumar

0 Answers  

explain the Trip supervision circuit

0 Answers   NCC,

4.In which type of welding is a pool of molten metal used.....

3 Answers   ISRO, SSC, Vizag Steel,

what is ground clearence in transmission system.is it varies wit conductor size,height of poles,span.

1 Answers  

which have higher efficiency transformer or induction moter

8 Answers   BARC,