Usually busbar sizes selection depends mainly on two
factors. Which is current + temperature. The size which you
are going to select must carry the current you need and
must not create much heat which excess the limits.
We have consider so many factors to calculate Busbar sizing.
a) Current carrying capacity : for that Copper can go upto
1.6A/Sq.mm and Aluminium is 1A/Sq.mm
b) Ambient temp. and temp. rise to considered.
c) Heat loss to be considered.
d) Short circuit current to be considered.
i want to ask that as everybody knows that in star
connection on star point is called neutral. my question is
that why on that poin called neutral. what is the reason
behind it. what is the logic behind it. i heared somewhere
that on this point all phases current become zero thats
why. if this answer is right then prove why on that point
is current become zero. if this answer is not right then
tell me the right answer. post ur answer here or on my mail
For a Potential Transformer(PT), the primary neutral
terminal must be grounded before energization. Why....?
What will be heppend if we energize the PT without grounded
the primary neutral point? Why..........?