Question { 6841 }

why is a avtomatic voltage regulator used for?

Answer

Hi...
i have one query.
in my native place We have Fridge , i put Stabilizer for fridge, spec is as follows
Input 130-270 ,Output- 230.....But the problem is that voltage we are getting from Electricity supply company is low it is below 110 V . so fridge doesn't start,,i think it is not meeting the spec of the stabilizer..is there any solution over it

Question { Birla, 4055 }

when an induction motor runs on load.at that time if we
reduce the supply voltage the current increases.But when it
runs without load,if we reduce the supply voltage the
current also reduced.why?.i checked it practically also.

Answer

when motor runs on load ;there is a load who will draw
more current if u reduce the voltage load will draw more
current because it is essential to run the desire load ,
Formull V=IR,...when ther is no load nobody is there to
draw the more current ,so current reduce if u reduce the
supply voltage