what is the difference between thermal magnetic release and
microprocessor based release breakers. what are the advantages
of latter over the first one...
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Answer Posted / manojkrishnan
The thermal-magnetic release tripping circuit works with the
advantage of bimetallic strip, on which a heating element is
wound and so it needs particular time to trip ( heat up the
metallic strip > open circuit the holding coil > opens the
contacts ) .But the microprocessor based CB trips more
rapidly as we can set the tripping current,sensitivity and
tripping time more accurately with the help of a CT or a
current sensing resistor (in DC ).
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