Answer / omar aziz

HVDC is a new development in the transmission industry.
Advantages are jwL tends to 0 and 1/jwC tends to infinity.
that means in your DC steady state operation inductors act
as a short circuit and capacitors act as open circuits
hance no reactive and active power . you alaway run a unity
pf.
Initially it was not feasible due to transformation but
thans to inverters and rectifiers, we wan convert DC into
AC transform it using a transformer and convert if back to
DC using a rectifier . Its is that simple,.

how we calculate the knee point of a protection and metering CT and what is the testing procedure.

1 Answers   CS,

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why the secondary current transformer cannot left open

1 Answers  

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Can we inject more current in ct primary paralleling 2 loading transformers/Injection kit at a time?let ct ratio be (5000/1A)(per kit rating 2000A range),i need to inject 5000A,if this cant b done means wat is d optional?

1 Answers  

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which one is rotating transformer-single phase induction motor or 3 phase squirrel cage motor?

1 Answers  

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why transformer impedance measure in % (percentage)

4 Answers   Hindalco,

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Why temperature rise test is conducted in bus bars and Isolators?

5 Answers   Areva,

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haw to calculate resistance of induction motar

1 Answers  

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why do we use 3 single phase instead of one 3 phase?? though vee connection is its advantage but what is the hidden reason behind it??

2 Answers  

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where the protection CT in neutral of transformer be located, before bifurcation or after bifurcation and why.

2 Answers  

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What is the selection process of breakers. Can any one please give a formulation on same?

0 Answers   Sterling Wilson,

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pls tell us AC plant are how do work and parts name with picture

0 Answers   Mukand,

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can the measured percentage error during calibration of single phase energy meter be negative?

0 Answers  

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