Question { 12580 }

What is meant by the KA-rating of a circuit breaker? In
this regard, discuss the stresses experienced by the
circuit breakers

Answer

KA Rating of Circuit Breaker is nothing but a Short Circuit
Breaking Current Capacity of Circuit Breakers which is
around 40 KA EHV Circuit Breaker.
The Circuit Breakers do experience Mechanical Stresses
during closing & opening operations.

Question { 13324 }

whatis the difference between electrical and electronics?

Answer

The basic differrence between Electrical & Electronics is
that Electrical-deals with linear device wheras Electronics-
deals with non-linear device.
For example, if you draw a chart of V / I (Ohm's Law) for
electrical device you'll get a straight line & for a
semiconductor device like a diode you'll get a non-linear
curve.

Question { Amara Raja, 16671 }

What do you mean by creepage distance?

Answer

In technical design of electrical equipments like CT, PT,
Circuit Breakers etc. the height of support insulator used
in it, to give enough ground clearance is of most
importance. However, this height is not absolute vertical
but it is measured following the curves of the insulator
with the help of cello-tape.