Answer / abishekmittal

Answer number 1 is o.k. but to add to that in D-TYPE MCBs,
instantaneous tripping occurs only for currents greater
than 10 x times the rated value of MCB.

Answer / jayaseelan

d-curve mcbs appl. to avoid high inrush current
ex.transformer,induction motors etc.

Answer / expert

I think the first ans is wrong, D curve only refers to
the shape of back side of MCB , by which it is mounted on
the mounting strip

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