Answer / sakthivel

Er sushil saini i understand in your answer but in power
house batter is not available other wise power pack power
supply available , power pack is nothing but it is a in our
three phase power supply converted in to dc 110 volts , in
this circumstance what can i do vanthni@yahoo.com please
answer Er sushil saini

Answer / nishant2110

hey guys ....what a funny answers !!!! we have only two
extreams either open or closed. which can be serve by dc
only ..means if dc is given to trip coil,coil gets
magnetise in one direction.so that breaker gets opened.
Suppose if Ac would have been given two coil,magnetic
direction must gets changed according to frequency of
supply. So breaker starts to-n-fro motion. practically
there wont be any to-n-fro motin also because its frequency
is so high it will stay at same position. so it wont serve
the use of breaker.

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