What is mean by making & breaking capacity of circuit
breakers?
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Answer Posted / naresh kumar dhal
making capacity=2.55*symmetrical breaking capacity
Always ckt breakers are rated in its symmetrical breaking
capacity.It is the rms value of fault current that a ckt
breaker can handle for short duration of time,which is
called short time rating.
If breaker is rated 10 mva,then its symmetrical breaking
capacity is 10mva.i.e root3*v*I*10-6=10mva,from this u
calculate current.Which is the symmetrical breaking current
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