The 3 indicates RYB and .5 Neutral. In normal conditions,
power supplied is balanced. So, no neutral current flows.
But in case of small unbalanced condtions, low amount of
neutral current has been found and hence to provide the
path for it, neutral wire is provided with half of the
cross section that of phase.
1.What is the proper definition of power system stability?
2.some times a blue spark is visible in the secondary side
of a distribution transformer at the contact position of
bushings and fuse wire,why?